Rustfmt layout crate

components/layout/animation.rs

@@ -32,8 +32,7 @@ pub fn update_animation_state<E>(
     new_animations_receiver: &Receiver<Animation>,
     pipeline_id: PipelineId,
     timer: &Timer,
-)
-where
+) where
     E: TElement,
 {
     let mut new_running_animations = vec![];
@@ -66,7 +65,7 @@ where
     if running_animations.is_empty() && new_running_animations.is_empty() {
         // Nothing to do. Return early so we don't flood the compositor with
         // `ChangeRunningAnimationsState` messages.
-        return
+        return;
     }
 
     let now = timer.seconds();
@@ -82,30 +81,32 @@ where
             let still_running = !running_animation.is_expired() && match running_animation {
                 Animation::Transition(_, started_at, ref frame, _expired) => {
                     now < started_at + frame.duration
-                }
+                },
                 Animation::Keyframes(_, _, _, ref mut state) => {
                     // This animation is still running, or we need to keep
                     // iterating.
                     now < state.started_at + state.duration || state.tick()
-                }
+                },
             };
 
             if still_running {
                 animations_still_running.push(running_animation);
-                continue
+                continue;
             }
 
             if let Animation::Transition(node, _, ref frame, _) = running_animation {
-                script_chan.send(ConstellationControlMsg::TransitionEnd(node.to_untrusted_node_address(),
-                                                                        frame.property_animation
-                                                                             .property_name().into(),
-                                                                        frame.duration))
-                           .unwrap();
+                script_chan
+                    .send(ConstellationControlMsg::TransitionEnd(
+                        node.to_untrusted_node_address(),
+                        frame.property_animation.property_name().into(),
+                        frame.duration,
+                    )).unwrap();
             }
 
-            expired_animations.entry(*key)
-                              .or_insert_with(Vec::new)
-                              .push(running_animation);
+            expired_animations
+                .entry(*key)
+                .or_insert_with(Vec::new)
+                .push(running_animation);
         }
 
         if animations_still_running.is_empty() {
@@ -125,16 +126,17 @@ where
             match newly_transitioning_nodes {
                 Some(ref mut nodes) => {
                     nodes.push(new_running_animation.node().to_untrusted_node_address());
-                }
+                },
                 None => {
                     warn!("New transition encountered from compositor-initiated layout.");
-                }
+                },
             }
         }
 
-        running_animations.entry(*new_running_animation.node())
-                          .or_insert_with(Vec::new)
-                          .push(new_running_animation)
+        running_animations
+            .entry(*new_running_animation.node())
+            .or_insert_with(Vec::new)
+            .push(new_running_animation)
     }
 
     let animation_state = if running_animations.is_empty() {
@@ -143,9 +145,11 @@ where
         AnimationState::AnimationsPresent
     };
 
-    constellation_chan.send(ConstellationMsg::ChangeRunningAnimationsState(pipeline_id,
-                                                                           animation_state))
-                      .unwrap();
+    constellation_chan
+        .send(ConstellationMsg::ChangeRunningAnimationsState(
+            pipeline_id,
+            animation_state,
+        )).unwrap();
 }
 
 /// Recalculates style for a set of animations. This does *not* run with the DOM
@@ -154,8 +158,7 @@ pub fn recalc_style_for_animations<E>(
     context: &LayoutContext,
     flow: &mut Flow,
     animations: &FxHashMap<OpaqueNode, Vec<Animation>>,
-)
-where
+) where
     E: TElement,
 {
     let mut damage = RestyleDamage::empty();
@@ -170,10 +173,7 @@ where
                     &ServoMetricsProvider,
                 );
                 let difference =
-                    RestyleDamage::compute_style_difference(
-                        &old_style,
-                        &fragment.style,
-                    );
+                    RestyleDamage::compute_style_difference(&old_style, &fragment.style);
                 damage |= difference.damage;
             }
         }

components/layout/context.rs

@@ -32,7 +32,8 @@ pub type LayoutFontContext = FontContext<FontCacheThread>;
 thread_local!(static FONT_CONTEXT_KEY: RefCell<Option<LayoutFontContext>> = RefCell::new(None));
 
 pub fn with_thread_local_font_context<F, R>(layout_context: &LayoutContext, f: F) -> R
-    where F: FnOnce(&mut LayoutFontContext) -> R
+where
+    F: FnOnce(&mut LayoutFontContext) -> R,
 {
     FONT_CONTEXT_KEY.with(|k| {
         let mut font_context = k.borrow_mut();
@@ -69,9 +70,11 @@ pub struct LayoutContext<'a> {
     pub font_cache_thread: Mutex<FontCacheThread>,
 
     /// A cache of WebRender image info.
-    pub webrender_image_cache: Arc<RwLock<HashMap<(ServoUrl, UsePlaceholder),
-                                                  WebRenderImageInfo,
-                                                  BuildHasherDefault<FnvHasher>>>>,
+    pub webrender_image_cache: Arc<
+        RwLock<
+            HashMap<(ServoUrl, UsePlaceholder), WebRenderImageInfo, BuildHasherDefault<FnvHasher>>,
+        >,
+    >,
 
     /// Paint worklets
     pub registered_painters: &'a RegisteredPainters,
@@ -101,11 +104,12 @@ impl<'a> LayoutContext<'a> {
         &self.style_context
     }
 
-    pub fn get_or_request_image_or_meta(&self,
-                                        node: OpaqueNode,
-                                        url: ServoUrl,
-                                        use_placeholder: UsePlaceholder)
-                                        -> Option<ImageOrMetadataAvailable> {
+    pub fn get_or_request_image_or_meta(
+        &self,
+        node: OpaqueNode,
+        url: ServoUrl,
+        use_placeholder: UsePlaceholder,
+    ) -> Option<ImageOrMetadataAvailable> {
         //XXXjdm For cases where we do not request an image, we still need to
         //       ensure the node gets another script-initiated reflow or it
         //       won't be requested at all.
@@ -116,9 +120,9 @@ impl<'a> LayoutContext<'a> {
         };
 
         // See if the image is already available
-        let result = self.image_cache.find_image_or_metadata(url.clone(),
-                                                             use_placeholder,
-                                                             can_request);
+        let result =
+            self.image_cache
+                .find_image_or_metadata(url.clone(), use_placeholder, can_request);
         match result {
             Ok(image_or_metadata) => Some(image_or_metadata),
             // Image failed to load, so just return nothing
@@ -130,9 +134,14 @@ impl<'a> LayoutContext<'a> {
                     node: node.to_untrusted_node_address(),
                     id: id,
                 };
-                self.pending_images.as_ref().unwrap().lock().unwrap().push(image);
+                self.pending_images
+                    .as_ref()
+                    .unwrap()
+                    .lock()
+                    .unwrap()
+                    .push(image);
                 None
-            }
+            },
             // Image has been requested, is still pending. Return no image for this paint loop.
             // When the image loads it will trigger a reflow and/or repaint.
             Err(ImageState::Pending(id)) => {
@@ -148,19 +157,22 @@ impl<'a> LayoutContext<'a> {
                     pending_images.lock().unwrap().push(image);
                 }
                 None
-            }
+            },
         }
     }
 
-    pub fn get_webrender_image_for_url(&self,
-                                       node: OpaqueNode,
-                                       url: ServoUrl,
-                                       use_placeholder: UsePlaceholder)
-                                       -> Option<WebRenderImageInfo> {
-        if let Some(existing_webrender_image) = self.webrender_image_cache
-                                                    .read()
-                                                    .get(&(url.clone(), use_placeholder)) {
-            return Some((*existing_webrender_image).clone())
+    pub fn get_webrender_image_for_url(
+        &self,
+        node: OpaqueNode,
+        url: ServoUrl,
+        use_placeholder: UsePlaceholder,
+    ) -> Option<WebRenderImageInfo> {
+        if let Some(existing_webrender_image) = self
+            .webrender_image_cache
+            .read()
+            .get(&(url.clone(), use_placeholder))
+        {
+            return Some((*existing_webrender_image).clone());
         }
 
         match self.get_or_request_image_or_meta(node, url.clone(), use_placeholder) {
@@ -170,11 +182,10 @@ impl<'a> LayoutContext<'a> {
                     Some(image_info)
                 } else {
                     let mut webrender_image_cache = self.webrender_image_cache.write();
-                    webrender_image_cache.insert((url, use_placeholder),
-                                                 image_info);
+                    webrender_image_cache.insert((url, use_placeholder), image_info);
                     Some(image_info)
                 }
-            }
+            },
             None | Some(ImageOrMetadataAvailable::MetadataAvailable(_)) => None,
         }
     }

components/layout/data.rs

@@ -24,7 +24,6 @@ impl StyleAndLayoutData {
     }
 }
 
-
 /// Data that layout associates with a node.
 #[repr(C)]
 pub struct LayoutData {

components/layout/display_list/background.rs

@@ -444,8 +444,7 @@ fn convert_gradient_stops(
         .filter_map(|item| match *item {
             GenericGradientItem::ColorStop(ref stop) => Some(*stop),
             _ => None,
-        })
-        .collect::<Vec<_>>();
+        }).collect::<Vec<_>>();
 
     assert!(stop_items.len() >= 2);
 

components/layout/display_list/builder.rs

@@ -1414,8 +1414,7 @@ impl FragmentDisplayListBuilding for Fragment {
                         url.clone(),
                         UsePlaceholder::No,
                     )
-                })
-                .and_then(|image| {
+                }).and_then(|image| {
                     build_image_border_details(image, border_style_struct, outset_layout)
                 }),
         };
@@ -1957,8 +1956,7 @@ impl FragmentDisplayListBuilding for Fragment {
                                 .send(CanvasMsg::FromLayout(
                                     FromLayoutMsg::SendData(sender),
                                     canvas_fragment_info.canvas_id.clone(),
-                                ))
-                                .unwrap();
+                                )).unwrap();
                             receiver.recv().unwrap().image_key
                         },
                         None => return,
@@ -2070,10 +2068,12 @@ impl FragmentDisplayListBuilding for Fragment {
         // FIXME(pcwalton): Get the real container size.
         let container_size = Size2D::zero();
         let metrics = &text_fragment.run.font_metrics;
-        let baseline_origin = stacking_relative_content_box.origin +
-            LogicalPoint::new(self.style.writing_mode, Au(0), metrics.ascent)
-                .to_physical(self.style.writing_mode, container_size)
-                .to_vector();
+        let baseline_origin = stacking_relative_content_box.origin + LogicalPoint::new(
+            self.style.writing_mode,
+            Au(0),
+            metrics.ascent,
+        ).to_physical(self.style.writing_mode, container_size)
+        .to_vector();
 
         // Base item for all text/shadows
         let base = state.create_base_display_item(

components/layout/display_list/items.rs

@@ -513,27 +513,29 @@ impl ClippingRegion {
     /// This is a quick, not a precise, test; it can yield false positives.
     #[inline]
     pub fn might_intersect_point(&self, point: &LayoutPoint) -> bool {
-        self.main.contains(point) &&
-            self.complex
-                .iter()
-                .all(|complex| complex.rect.contains(point))
+        self.main.contains(point) && self
+            .complex
+            .iter()
+            .all(|complex| complex.rect.contains(point))
     }
 
     /// Returns true if this clipping region might intersect the given rectangle and false
     /// otherwise. This is a quick, not a precise, test; it can yield false positives.
     #[inline]
     pub fn might_intersect_rect(&self, rect: &LayoutRect) -> bool {
-        self.main.intersects(rect) &&
-            self.complex
-                .iter()
-                .all(|complex| complex.rect.intersects(rect))
+        self.main.intersects(rect) && self
+            .complex
+            .iter()
+            .all(|complex| complex.rect.intersects(rect))
     }
 
     /// Returns true if this clipping region completely surrounds the given rect.
     #[inline]
     pub fn does_not_clip_rect(&self, rect: &LayoutRect) -> bool {
-        self.main.contains(&rect.origin) && self.main.contains(&rect.bottom_right()) &&
-            self.complex.iter().all(|complex| {
+        self.main.contains(&rect.origin) && self.main.contains(&rect.bottom_right()) && self
+            .complex
+            .iter()
+            .all(|complex| {
                 complex.rect.contains(&rect.origin) && complex.rect.contains(&rect.bottom_right())
             })
     }
@@ -588,8 +590,7 @@ impl ClippingRegion {
                     rect: complex.rect.translate(delta),
                     radii: complex.radii,
                     mode: complex.mode,
-                })
-                .collect(),
+                }).collect(),
         }
     }
 

components/layout/flex.rs

@@ -45,25 +45,25 @@ enum AxisSize {
 impl AxisSize {
     /// Generate a new available cross or main axis size from the specified size of the container,
     /// containing block size, min constraint, and max constraint
-    pub fn new(size: LengthOrPercentageOrAuto, content_size: Option<Au>, min: LengthOrPercentage,
-               max: LengthOrPercentageOrNone) -> AxisSize {
+    pub fn new(
+        size: LengthOrPercentageOrAuto,
+        content_size: Option<Au>,
+        min: LengthOrPercentage,
+        max: LengthOrPercentageOrNone,
+    ) -> AxisSize {
         match size {
             LengthOrPercentageOrAuto::Length(length) => AxisSize::Definite(Au::from(length)),
-            LengthOrPercentageOrAuto::Percentage(percent) => {
-                match content_size {
-                    Some(size) => AxisSize::Definite(size.scale_by(percent.0)),
-                    None => AxisSize::Infinite
-                }
-            }
-            LengthOrPercentageOrAuto::Calc(calc) => {
-                match calc.to_used_value(content_size) {
-                    Some(length) => AxisSize::Definite(length),
-                    None => AxisSize::Infinite,
-                }
-            }
+            LengthOrPercentageOrAuto::Percentage(percent) => match content_size {
+                Some(size) => AxisSize::Definite(size.scale_by(percent.0)),
+                None => AxisSize::Infinite,
+            },
+            LengthOrPercentageOrAuto::Calc(calc) => match calc.to_used_value(content_size) {
+                Some(length) => AxisSize::Definite(length),
+                None => AxisSize::Infinite,
+            },
             LengthOrPercentageOrAuto::Auto => {
                 AxisSize::MinMax(SizeConstraint::new(content_size, min, max, None))
-            }
+            },
         }
     }
 }
@@ -112,7 +112,7 @@ struct FlexItem {
     /// Whether the main size has met its constraint.
     pub is_frozen: bool,
     /// True if this flow has property 'visibility::collapse'.
-    pub is_strut: bool
+    pub is_strut: bool,
 }
 
 impl FlexItem {
@@ -133,7 +133,7 @@ impl FlexItem {
             flex_shrink: flex_shrink.into(),
             order: order,
             is_frozen: false,
-            is_strut: false
+            is_strut: false,
         }
     }
 
@@ -147,41 +147,61 @@ impl FlexItem {
             // should change to LengthOrPercentageOrAuto for automatic implied minimal size.
             // https://drafts.csswg.org/css-flexbox-1/#min-size-auto
             Direction::Inline => {
-                let basis = from_flex_basis(block.fragment.style.get_position().flex_basis,
-                                            block.fragment.style.content_inline_size(),
-                                            containing_length);
+                let basis = from_flex_basis(
+                    block.fragment.style.get_position().flex_basis,
+                    block.fragment.style.content_inline_size(),
+                    containing_length,
+                );
 
                 // These methods compute auto margins to zero length, which is exactly what we want.
                 block.fragment.compute_border_and_padding(containing_length);
-                block.fragment.compute_inline_direction_margins(containing_length);
-                block.fragment.compute_block_direction_margins(containing_length);
+                block
+                    .fragment
+                    .compute_inline_direction_margins(containing_length);
+                block
+                    .fragment
+                    .compute_block_direction_margins(containing_length);
 
                 let (border_padding, margin) = block.fragment.surrounding_intrinsic_inline_size();
-                let content_size = block.base.intrinsic_inline_sizes.preferred_inline_size
-                    - border_padding
-                    - margin
-                    + block.fragment.box_sizing_boundary(direction);
+                let content_size = block.base.intrinsic_inline_sizes.preferred_inline_size -
+                    border_padding -
+                    margin +
+                    block.fragment.box_sizing_boundary(direction);
                 self.base_size = basis.specified_or_default(content_size);
-                self.max_size =
-                    block.fragment.style.max_inline_size()
-                         .to_used_value(containing_length)
-                         .unwrap_or(MAX_AU);
-                self.min_size = block.fragment.style.min_inline_size().to_used_value(containing_length);
-            }
+                self.max_size = block
+                    .fragment
+                    .style
+                    .max_inline_size()
+                    .to_used_value(containing_length)
+                    .unwrap_or(MAX_AU);
+                self.min_size = block
+                    .fragment
+                    .style
+                    .min_inline_size()
+                    .to_used_value(containing_length);
+            },
             Direction::Block => {
-                let basis = from_flex_basis(block.fragment.style.get_position().flex_basis,
-                                            block.fragment.style.content_block_size(),
-                                            containing_length);
-                let content_size = block.fragment.border_box.size.block
-                    - block.fragment.border_padding.block_start_end()
-                    + block.fragment.box_sizing_boundary(direction);
+                let basis = from_flex_basis(
+                    block.fragment.style.get_position().flex_basis,
+                    block.fragment.style.content_block_size(),
+                    containing_length,
+                );
+                let content_size = block.fragment.border_box.size.block -
+                    block.fragment.border_padding.block_start_end() +
+                    block.fragment.box_sizing_boundary(direction);
                 self.base_size = basis.specified_or_default(content_size);
-                self.max_size =
-                    block.fragment.style.max_block_size()
-                         .to_used_value(containing_length)
-                         .unwrap_or(MAX_AU);
-                self.min_size = block.fragment.style.min_block_size().to_used_value(containing_length);
-            }
+                self.max_size = block
+                    .fragment
+                    .style
+                    .max_block_size()
+                    .to_used_value(containing_length)
+                    .unwrap_or(MAX_AU);
+                self.min_size = block
+                    .fragment
+                    .style
+                    .min_block_size()
+                    .to_used_value(containing_length);
+            },
         }
     }
 
@@ -192,13 +212,14 @@ impl FlexItem {
         let outer_width = match direction {
             Direction::Inline => {
                 fragment.border_padding.inline_start_end() + fragment.margin.inline_start_end()
-            }
+            },
             Direction::Block => {
                 fragment.border_padding.block_start_end() + fragment.margin.block_start_end()
-            }
+            },
         };
-        max(self.min_size, min(self.base_size, self.max_size))
-            - fragment.box_sizing_boundary(direction) + outer_width
+        max(self.min_size, min(self.base_size, self.max_size)) -
+            fragment.box_sizing_boundary(direction) +
+            outer_width
     }
 
     /// Returns the number of auto margins in given direction.
@@ -213,7 +234,7 @@ impl FlexItem {
                 if margin.inline_end == LengthOrPercentageOrAuto::Auto {
                     margin_count += 1;
                 }
-            }
+            },
             Direction::Block => {
                 if margin.block_start == LengthOrPercentageOrAuto::Auto {
                     margin_count += 1;
@@ -221,7 +242,7 @@ impl FlexItem {
                 if margin.block_end == LengthOrPercentageOrAuto::Auto {
                     margin_count += 1;
                 }
-            }
+            },
         }
         margin_count
     }
@@ -247,7 +268,7 @@ impl FlexLine {
             range: range,
             auto_margin_count: auto_margin_count,
             free_space: free_space,
-            cross_size: Au(0)
+            cross_size: Au(0),
         }
     }
 
@@ -265,17 +286,20 @@ impl FlexLine {
         // https://drafts.csswg.org/css-flexbox/#resolve-flexible-lengths
         for item in items.iter_mut().filter(|i| !(i.is_strut && collapse)) {
             item.main_size = max(item.min_size, min(item.base_size, item.max_size));
-            if (self.free_space > Au(0) && (item.flex_grow == 0.0 || item.base_size >= item.max_size)) ||
-                (self.free_space < Au(0) && (item.flex_shrink == 0.0 || item.base_size <= item.min_size)) {
-                    item.is_frozen = true;
-                } else {
-                    item.is_frozen = false;
-                    total_grow += item.flex_grow;
-                    total_shrink += item.flex_shrink;
-                    // The scaled factor is used to calculate flex shrink
-                    total_scaled += item.flex_shrink * item.base_size.0 as f32;
-                    active_count += 1;
-                }
+            if (self.free_space > Au(0) &&
+                (item.flex_grow == 0.0 || item.base_size >= item.max_size)) ||
+                (self.free_space < Au(0) &&
+                    (item.flex_shrink == 0.0 || item.base_size <= item.min_size))
+            {
+                item.is_frozen = true;
+            } else {
+                item.is_frozen = false;
+                total_grow += item.flex_grow;
+                total_shrink += item.flex_shrink;
+                // The scaled factor is used to calculate flex shrink
+                total_scaled += item.flex_shrink * item.base_size.0 as f32;
+                active_count += 1;
+            }
         }
 
         let initial_free_space = self.free_space;
@@ -291,12 +315,19 @@ impl FlexLine {
                 };
 
             total_variation = Au(0);
-            for item in items.iter_mut().filter(|i| !i.is_frozen).filter(|i| !(i.is_strut && collapse)) {
+            for item in items
+                .iter_mut()
+                .filter(|i| !i.is_frozen)
+                .filter(|i| !(i.is_strut && collapse))
+            {
                 // Use this and the 'abs()' below to make the code work in both grow and shrink scenarios.
                 let (factor, end_size) = if self.free_space > Au(0) {
                     (item.flex_grow / total_grow, item.max_size)
                 } else {
-                    (item.flex_shrink * item.base_size.0 as f32 / total_scaled, item.min_size)
+                    (
+                        item.flex_shrink * item.base_size.0 as f32 / total_scaled,
+                        item.min_size,
+                    )
                 };
                 let variation = self.free_space.scale_by(factor);
                 if variation.0.abs() >= (end_size - item.main_size).0.abs() {
@@ -343,13 +374,11 @@ pub struct FlexFlow {
     /// True if this flex container can be multiline.
     is_wrappable: bool,
     /// True if the cross direction is reversed.
-    cross_reverse: bool
+    cross_reverse: bool,
 }
 
 impl FlexFlow {
-    pub fn from_fragment(fragment: Fragment,
-                         flotation: Option<FloatKind>)
-                         -> FlexFlow {
+    pub fn from_fragment(fragment: Fragment, flotation: Option<FloatKind>) -> FlexFlow {
         let main_mode;
         let main_reverse;
         let is_wrappable;
@@ -363,8 +392,7 @@ impl FlexFlow {
                 FlexDirection::ColumnReverse => (Direction::Block, true),
             };
             main_mode = mode;
-            main_reverse =
-                reverse == style.writing_mode.is_bidi_ltr();
+            main_reverse = reverse == style.writing_mode.is_bidi_ltr();
             let (wrappable, reverse) = match fragment.style.get_position().flex_wrap {
                 FlexWrap::Nowrap => (false, false),
                 FlexWrap::Wrap => (true, false),
@@ -384,7 +412,7 @@ impl FlexFlow {
             items: Vec::new(),
             main_reverse: main_reverse,
             is_wrappable: is_wrappable,
-            cross_reverse: cross_reverse
+            cross_reverse: cross_reverse,
         }
     }
 
@@ -414,7 +442,10 @@ impl FlexFlow {
             let kid = children.get(item.index);
             item.init_sizes(kid, container_size, self.main_mode);
             let outer_main_size = item.outer_main_size(kid, self.main_mode);
-            if total_line_size + outer_main_size > container_size && end != start && self.is_wrappable {
+            if total_line_size + outer_main_size > container_size &&
+                end != start &&
+                self.is_wrappable
+            {
                 break;
             }
             margin_count += item.auto_margin_count(kid, self.main_mode);
@@ -439,7 +470,8 @@ impl FlexFlow {
         if !fixed_width {
             for kid in self.block_flow.base.children.iter_mut() {
                 let base = kid.mut_base();
-                let is_absolutely_positioned = base.flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED);
+                let is_absolutely_positioned =
+                    base.flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED);
                 if !is_absolutely_positioned {
                     let flex_item_inline_sizes = IntrinsicISizes {
                         minimum_inline_size: base.intrinsic_inline_sizes.minimum_inline_size,
@@ -465,15 +497,18 @@ impl FlexFlow {
         if !fixed_width {
             for kid in self.block_flow.base.children.iter_mut() {
                 let base = kid.mut_base();
-                let is_absolutely_positioned = base.flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED);
+                let is_absolutely_positioned =
+                    base.flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED);
                 if !is_absolutely_positioned {
-                    computation.content_intrinsic_sizes.minimum_inline_size =
-                        max(computation.content_intrinsic_sizes.minimum_inline_size,
-                            base.intrinsic_inline_sizes.minimum_inline_size);
+                    computation.content_intrinsic_sizes.minimum_inline_size = max(
+                        computation.content_intrinsic_sizes.minimum_inline_size,
+                        base.intrinsic_inline_sizes.minimum_inline_size,
+                    );
 
-                    computation.content_intrinsic_sizes.preferred_inline_size =
-                        max(computation.content_intrinsic_sizes.preferred_inline_size,
-                            base.intrinsic_inline_sizes.preferred_inline_size);
+                    computation.content_intrinsic_sizes.preferred_inline_size = max(
+                        computation.content_intrinsic_sizes.preferred_inline_size,
+                        base.intrinsic_inline_sizes.preferred_inline_size,
+                    );
                 }
             }
         }
@@ -483,11 +518,13 @@ impl FlexFlow {
     // TODO(zentner): This function needs to be radically different for multi-line flexbox.
     // Currently, this is the core of BlockFlow::propagate_assigned_inline_size_to_children() with
     // all float and table logic stripped out.
-    fn block_mode_assign_inline_sizes(&mut self,
-                                      _layout_context: &LayoutContext,
-                                      inline_start_content_edge: Au,
-                                      inline_end_content_edge: Au,
-                                      content_inline_size: Au) {
+    fn block_mode_assign_inline_sizes(
+        &mut self,
+        _layout_context: &LayoutContext,
+        inline_start_content_edge: Au,
+        inline_end_content_edge: Au,
+        content_inline_size: Au,
+    ) {
         let _scope = layout_debug_scope!("flex::block_mode_assign_inline_sizes");
         debug!("flex::block_mode_assign_inline_sizes");
 
@@ -496,19 +533,22 @@ impl FlexFlow {
 
         let container_block_size = match self.available_main_size {
             AxisSize::Definite(length) => Some(length),
-            _ => None
+            _ => None,
         };
         let container_inline_size = match self.available_cross_size {
             AxisSize::Definite(length) => length,
             AxisSize::MinMax(ref constraint) => constraint.clamp(content_inline_size),
-            AxisSize::Infinite => content_inline_size
+            AxisSize::Infinite => content_inline_size,
         };
 
         let mut children = self.block_flow.base.children.random_access_mut();
         for kid in &mut self.items {
             let kid_base = children.get(kid.index).mut_base();
             kid_base.block_container_explicit_block_size = container_block_size;
-            if kid_base.flags.contains(FlowFlags::INLINE_POSITION_IS_STATIC) {
+            if kid_base
+                .flags
+                .contains(FlowFlags::INLINE_POSITION_IS_STATIC)
+            {
                 // The inline-start margin edge of the child flow is at our inline-start content
                 // edge, and its inline-size is our content inline-size.
                 kid_base.position.start.i =
@@ -525,11 +565,13 @@ impl FlexFlow {
         }
     }
 
-    fn inline_mode_assign_inline_sizes(&mut self,
-                                       layout_context: &LayoutContext,
-                                       inline_start_content_edge: Au,
-                                       _inline_end_content_edge: Au,
-                                       content_inline_size: Au) {
+    fn inline_mode_assign_inline_sizes(
+        &mut self,
+        layout_context: &LayoutContext,
+        inline_start_content_edge: Au,
+        _inline_end_content_edge: Au,
+        content_inline_size: Au,
+    ) {
         let _scope = layout_debug_scope!("flex::inline_mode_assign_inline_sizes");
         debug!("inline_mode_assign_inline_sizes");
 
@@ -551,17 +593,25 @@ impl FlexFlow {
         self.block_flow.base.position.size.inline = inline_size;
 
         // Calculate non-auto block size to pass to children.
-        let box_border = self.block_flow.fragment.box_sizing_boundary(Direction::Block);
+        let box_border = self
+            .block_flow
+            .fragment
+            .box_sizing_boundary(Direction::Block);
 
-        let parent_container_size =
-            self.block_flow.explicit_block_containing_size(layout_context.shared_context());
+        let parent_container_size = self
+            .block_flow
+            .explicit_block_containing_size(layout_context.shared_context());
         // https://drafts.csswg.org/css-ui-3/#box-sizing
         let explicit_content_size = self
-                                    .block_flow
-                                    .explicit_block_size(parent_container_size)
-                                    .map(|x| max(x - box_border, Au(0)));
-        let containing_block_text_align =
-            self.block_flow.fragment.style().get_inherited_text().text_align;
+            .block_flow
+            .explicit_block_size(parent_container_size)
+            .map(|x| max(x - box_border, Au(0)));
+        let containing_block_text_align = self
+            .block_flow
+            .fragment
+            .style()
+            .get_inherited_text()
+            .text_align;
 
         while let Some(mut line) = self.get_flex_line(inline_size) {
             let items = &mut self.items[line.range.clone()];
@@ -572,32 +622,42 @@ impl FlexFlow {
             let item_count = items.len() as i32;
             let mut cur_i = inline_start_content_edge;
             let item_interval = if line.free_space >= Au(0) && line.auto_margin_count == 0 {
-                match self.block_flow.fragment.style().get_position().justify_content {
+                match self
+                    .block_flow
+                    .fragment
+                    .style()
+                    .get_position()
+                    .justify_content
+                {
                     JustifyContent::SpaceBetween => {
                         if item_count == 1 {
                             Au(0)
                         } else {
                             line.free_space / (item_count - 1)
                         }
-                    }
-                    JustifyContent::SpaceAround => {
-                        line.free_space / item_count
-                    }
+                    },
+                    JustifyContent::SpaceAround => line.free_space / item_count,
                     _ => Au(0),
                 }
             } else {
                 Au(0)
             };
 
-            match self.block_flow.fragment.style().get_position().justify_content {
+            match self
+                .block_flow
+                .fragment
+                .style()
+                .get_position()
+                .justify_content
+            {
                 // Overflow equally in both ends of line.
                 JustifyContent::Center | JustifyContent::SpaceAround => {
                     cur_i += (line.free_space - item_interval * (item_count - 1)) / 2;
-                }
+                },
                 JustifyContent::FlexEnd => {
                     cur_i += line.free_space;
-                }
-                _ => {}
+                },
+                _ => {},
             }
 
             let mut children = self.block_flow.base.children.random_access_mut();
@@ -613,19 +673,18 @@ impl FlexFlow {
                 block.base.flags.set_text_align(containing_block_text_align);
 
                 let margin = block.fragment.style().logical_margin();
-                let auto_len =
-                    if line.auto_margin_count == 0 || line.free_space <= Au(0) {
-                        Au(0)
-                    } else {
-                        line.free_space / line.auto_margin_count
-                    };
+                let auto_len = if line.auto_margin_count == 0 || line.free_space <= Au(0) {
+                    Au(0)
+                } else {
+                    line.free_space / line.auto_margin_count
+                };
                 let margin_inline_start = MaybeAuto::from_style(margin.inline_start, inline_size)
                     .specified_or_default(auto_len);
                 let margin_inline_end = MaybeAuto::from_style(margin.inline_end, inline_size)
                     .specified_or_default(auto_len);
-                let item_inline_size = item.main_size
-                    - block.fragment.box_sizing_boundary(self.main_mode)
-                    + block.fragment.border_padding.inline_start_end();
+                let item_inline_size = item.main_size -
+                    block.fragment.box_sizing_boundary(self.main_mode) +
+                    block.fragment.border_padding.inline_start_end();
                 let item_outer_size = item_inline_size + block.fragment.margin.inline_start_end();
 
                 block.fragment.margin.inline_start = margin_inline_start;
@@ -635,7 +694,7 @@ impl FlexFlow {
                 block.base.position.start.i = if !self.main_reverse {
                     cur_i
                 } else {
-                    inline_start_content_edge * 2 + content_inline_size - cur_i  - item_outer_size
+                    inline_start_content_edge * 2 + content_inline_size - cur_i - item_outer_size
                 };
                 block.base.position.size.inline = item_outer_size;
                 cur_i += item_outer_size + item_interval;
@@ -669,7 +728,12 @@ impl FlexFlow {
         let _scope = layout_debug_scope!("flex::inline_mode_assign_block_size");
 
         let line_count = self.lines.len() as i32;
-        let line_align = self.block_flow.fragment.style().get_position().align_content;
+        let line_align = self
+            .block_flow
+            .fragment
+            .style()
+            .get_position()
+            .align_content;
         let mut cur_b = self.block_flow.fragment.border_padding.block_start;
         let mut total_cross_size = Au(0);
         let mut line_interval = Au(0);
@@ -679,22 +743,27 @@ impl FlexFlow {
             for line in self.lines.iter_mut() {
                 for item in &self.items[line.range.clone()] {
                     let fragment = &children.get(item.index).as_block().fragment;
-                    line.cross_size = max(line.cross_size,
-                                          fragment.border_box.size.block +
-                                          fragment.margin.block_start_end());
+                    line.cross_size = max(
+                        line.cross_size,
+                        fragment.border_box.size.block + fragment.margin.block_start_end(),
+                    );
                 }
                 total_cross_size += line.cross_size;
             }
         }
 
-        let box_border = self.block_flow.fragment.box_sizing_boundary(Direction::Block);
-        let parent_container_size =
-            self.block_flow.explicit_block_containing_size(layout_context.shared_context());
+        let box_border = self
+            .block_flow
+            .fragment
+            .box_sizing_boundary(Direction::Block);
+        let parent_container_size = self
+            .block_flow
+            .explicit_block_containing_size(layout_context.shared_context());
         // https://drafts.csswg.org/css-ui-3/#box-sizing
         let explicit_content_size = self
-                                    .block_flow
-                                    .explicit_block_size(parent_container_size)
-                                    .map(|x| max(x - box_border, Au(0)));
+            .block_flow
+            .explicit_block_size(parent_container_size)
+            .map(|x| max(x - box_border, Au(0)));
 
         if let Some(container_block_size) = explicit_content_size {
             let free_space = container_block_size - total_cross_size;
@@ -713,25 +782,25 @@ impl FlexFlow {
                     } else {
                         free_space / (line_count - 1)
                     }
-                }
+                },
                 AlignContent::SpaceAround => {
                     if line_count == 0 {
                         Au(0)
                     } else {
                         free_space / line_count
                     }
-                }
+                },
                 _ => Au(0),
             };
 
             match line_align {
                 AlignContent::Center | AlignContent::SpaceAround => {
                     cur_b += (free_space - line_interval * (line_count - 1)) / 2;
-                }
+                },
                 AlignContent::FlexEnd => {
                     cur_b += free_space;
-                }
-                _ => {}
+                },
+                _ => {},
             }
         }
 
@@ -744,8 +813,9 @@ impl FlexFlow {
 
                 let mut margin_block_start = block.fragment.margin.block_start;
                 let mut margin_block_end = block.fragment.margin.block_end;
-                let mut free_space = line.cross_size - block.base.position.size.block
-                    - block.fragment.margin.block_start_end();
+                let mut free_space = line.cross_size -
+                    block.base.position.size.block -
+                    block.fragment.margin.block_start_end();
 
                 // The spec is a little vague here, but if I understand it correctly, the outer
                 // cross size of item should equal to the line size if any auto margin exists.
@@ -758,29 +828,31 @@ impl FlexFlow {
                             free_space / auto_margin_count
                         };
                     }
-                    margin_block_end = line.cross_size - margin_block_start - block.base.position.size.block;
+                    margin_block_end =
+                        line.cross_size - margin_block_start - block.base.position.size.block;
                     free_space = Au(0);
                 }
 
                 let self_align = block.fragment.style().get_position().align_self;
                 if self_align == AlignSelf::Stretch &&
-                    block.fragment.style().content_block_size() == LengthOrPercentageOrAuto::Auto {
-                        free_space = Au(0);
-                        block.base.block_container_explicit_block_size = Some(line.cross_size);
-                        block.base.position.size.block =
-                            line.cross_size - margin_block_start - margin_block_end;
-                        block.fragment.border_box.size.block = block.base.position.size.block;
-                        // FIXME(stshine): item with 'align-self: stretch' and auto cross size should act
-                        // as if it has a fixed cross size, all child blocks should resolve against it.
-                        // block.assign_block_size(layout_context);
-                    }
-                block.base.position.start.b = margin_block_start +
-                    if !self.cross_reverse {
-                        cur_b
-                    } else {
-                        self.block_flow.fragment.border_padding.block_start * 2
-                            + total_cross_size - cur_b - line.cross_size
-                    };
+                    block.fragment.style().content_block_size() == LengthOrPercentageOrAuto::Auto
+                {
+                    free_space = Au(0);
+                    block.base.block_container_explicit_block_size = Some(line.cross_size);
+                    block.base.position.size.block =
+                        line.cross_size - margin_block_start - margin_block_end;
+                    block.fragment.border_box.size.block = block.base.position.size.block;
+                    // FIXME(stshine): item with 'align-self: stretch' and auto cross size should act
+                    // as if it has a fixed cross size, all child blocks should resolve against it.
+                    // block.assign_block_size(layout_context);
+                }
+                block.base.position.start.b = margin_block_start + if !self.cross_reverse {
+                    cur_b
+                } else {
+                    self.block_flow.fragment.border_padding.block_start * 2 + total_cross_size -
+                        cur_b -
+                        line.cross_size
+                };
                 // TODO(stshine): support baseline alignment.
                 if free_space != Au(0) {
                     let flex_cross = match self_align {
@@ -788,17 +860,17 @@ impl FlexFlow {
                         AlignSelf::Center => free_space / 2,
                         _ => Au(0),
                     };
-                    block.base.position.start.b +=
-                        if !self.cross_reverse {
-                            flex_cross
-                        } else {
-                            free_space - flex_cross
-                        };
+                    block.base.position.start.b += if !self.cross_reverse {
+                        flex_cross
+                    } else {
+                        free_space - flex_cross
+                    };
                 }
             }
             cur_b += line_interval + line.cross_size;
         }
-        let total_block_size = total_cross_size + self.block_flow.fragment.border_padding.block_start_end();
+        let total_block_size =
+            total_cross_size + self.block_flow.fragment.border_padding.block_start_end();
         self.block_flow.fragment.border_box.size.block = total_block_size;
         self.block_flow.base.position.size.block = total_block_size;
     }
@@ -830,72 +902,96 @@ impl Flow for FlexFlow {
     }
 
     fn bubble_inline_sizes(&mut self) {
-        let _scope = layout_debug_scope!("flex::bubble_inline_sizes {:x}",
-                                         self.block_flow.base.debug_id());
+        let _scope = layout_debug_scope!(
+            "flex::bubble_inline_sizes {:x}",
+            self.block_flow.base.debug_id()
+        );
 
         // Flexbox Section 9.0: Generate anonymous flex items:
         // This part was handled in the flow constructor.
 
         // Flexbox Section 9.1: Re-order flex items according to their order.
         // FIXME(stshine): This should be done during flow construction.
-        let mut items: Vec<FlexItem> =
-            self.block_flow
-                .base
-                .children
-                .iter()
-                .enumerate()
-                .filter(|&(_, flow)| {
-                    !flow.as_block().base.flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED)
-                })
-                .map(|(index, flow)| FlexItem::new(index, flow))
-                .collect();
+        let mut items: Vec<FlexItem> = self
+            .block_flow
+            .base
+            .children
+            .iter()
+            .enumerate()
+            .filter(|&(_, flow)| {
+                !flow
+                    .as_block()
+                    .base
+                    .flags
+                    .contains(FlowFlags::IS_ABSOLUTELY_POSITIONED)
+            }).map(|(index, flow)| FlexItem::new(index, flow))
+            .collect();
 
         items.sort_by_key(|item| item.order);
         self.items = items;
 
         match self.main_mode {
             Direction::Inline => self.inline_mode_bubble_inline_sizes(),
-            Direction::Block  => self.block_mode_bubble_inline_sizes()
+            Direction::Block => self.block_mode_bubble_inline_sizes(),
         }
     }
 
     fn assign_inline_sizes(&mut self, layout_context: &LayoutContext) {
-        let _scope = layout_debug_scope!("flex::assign_inline_sizes {:x}", self.block_flow.base.debug_id());
+        let _scope = layout_debug_scope!(
+            "flex::assign_inline_sizes {:x}",
+            self.block_flow.base.debug_id()
+        );
         debug!("assign_inline_sizes");
 
-        if !self.block_flow.base.restyle_damage.intersects(ServoRestyleDamage::REFLOW_OUT_OF_FLOW |
-                                                           ServoRestyleDamage::REFLOW) {
-            return
+        if !self
+            .block_flow
+            .base
+            .restyle_damage
+            .intersects(ServoRestyleDamage::REFLOW_OUT_OF_FLOW | ServoRestyleDamage::REFLOW)
+        {
+            return;
         }
 
-        self.block_flow.initialize_container_size_for_root(layout_context.shared_context());
+        self.block_flow
+            .initialize_container_size_for_root(layout_context.shared_context());
 
         // Our inline-size was set to the inline-size of the containing block by the flow's parent.
         // Now compute the real value.
         let containing_block_inline_size = self.block_flow.base.block_container_inline_size;
-        self.block_flow.compute_used_inline_size(layout_context.shared_context(),
-                                                 containing_block_inline_size);
+        self.block_flow.compute_used_inline_size(
+            layout_context.shared_context(),
+            containing_block_inline_size,
+        );
         if self.block_flow.base.flags.is_float() {
-            self.block_flow.float.as_mut().unwrap().containing_inline_size = containing_block_inline_size
+            self.block_flow
+                .float
+                .as_mut()
+                .unwrap()
+                .containing_inline_size = containing_block_inline_size
         }
 
         let (available_block_size, available_inline_size) = {
             let style = &self.block_flow.fragment.style;
-            let (specified_block_size, specified_inline_size) = if style.writing_mode.is_vertical() {
+            let (specified_block_size, specified_inline_size) = if style.writing_mode.is_vertical()
+            {
                 (style.get_position().width, style.get_position().height)
             } else {
                 (style.get_position().height, style.get_position().width)
             };
 
-            let available_inline_size = AxisSize::new(specified_inline_size,
-                                                      Some(self.block_flow.base.block_container_inline_size),
-                                                      style.min_inline_size(),
-                                                      style.max_inline_size());
+            let available_inline_size = AxisSize::new(
+                specified_inline_size,
+                Some(self.block_flow.base.block_container_inline_size),
+                style.min_inline_size(),
+                style.max_inline_size(),
+            );
 
-            let available_block_size = AxisSize::new(specified_block_size,
-                                                     self.block_flow.base.block_container_explicit_block_size,
-                                                     style.min_block_size(),
-                                                     style.max_block_size());
+            let available_block_size = AxisSize::new(
+                specified_block_size,
+                self.block_flow.base.block_container_explicit_block_size,
+                style.min_block_size(),
+                style.max_block_size(),
+            );
             (available_block_size, available_inline_size)
         };
 
@@ -903,37 +999,46 @@ impl Flow for FlexFlow {
         let inline_start_content_edge = self.block_flow.fragment.border_box.start.i +
             self.block_flow.fragment.border_padding.inline_start;
 
-        debug!("inline_start_content_edge = {:?}", inline_start_content_edge);
+        debug!(
+            "inline_start_content_edge = {:?}",
+            inline_start_content_edge
+        );
 
         let padding_and_borders = self.block_flow.fragment.border_padding.inline_start_end();
 
         // Distance from the inline-end margin edge to the inline-end content edge.
-        let inline_end_content_edge =
-            self.block_flow.fragment.margin.inline_end +
+        let inline_end_content_edge = self.block_flow.fragment.margin.inline_end +
             self.block_flow.fragment.border_padding.inline_end;
 
         debug!("padding_and_borders = {:?}", padding_and_borders);
-        debug!("self.block_flow.fragment.border_box.size.inline = {:?}",
-               self.block_flow.fragment.border_box.size.inline);
-        let content_inline_size = self.block_flow.fragment.border_box.size.inline - padding_and_borders;
+        debug!(
+            "self.block_flow.fragment.border_box.size.inline = {:?}",
+            self.block_flow.fragment.border_box.size.inline
+        );
+        let content_inline_size =
+            self.block_flow.fragment.border_box.size.inline - padding_and_borders;
 
         match self.main_mode {
             Direction::Inline => {
                 self.available_main_size = available_inline_size;
                 self.available_cross_size = available_block_size;
-                self.inline_mode_assign_inline_sizes(layout_context,
-                                                     inline_start_content_edge,
-                                                     inline_end_content_edge,
-                                                     content_inline_size)
-            }
-            Direction::Block  => {
+                self.inline_mode_assign_inline_sizes(
+                    layout_context,
+                    inline_start_content_edge,
+                    inline_end_content_edge,
+                    content_inline_size,
+                )
+            },
+            Direction::Block => {
                 self.available_main_size = available_block_size;
                 self.available_cross_size = available_inline_size;
-                self.block_mode_assign_inline_sizes(layout_context,
-                                                    inline_start_content_edge,
-                                                    inline_end_content_edge,
-                                                    content_inline_size)
-            }
+                self.block_mode_assign_inline_sizes(
+                    layout_context,
+                    inline_start_content_edge,
+                    inline_end_content_edge,
+                    content_inline_size,
+                )
+            },
         }
     }
 
@@ -941,31 +1046,37 @@ impl Flow for FlexFlow {
         match self.main_mode {
             Direction::Inline => {
                 self.inline_mode_assign_block_size(layout_context);
-                let block_start = AdjoiningMargins::from_margin(self.block_flow.fragment.margin.block_start);
-                let block_end = AdjoiningMargins::from_margin(self.block_flow.fragment.margin.block_end);
-                self.block_flow.base.collapsible_margins = CollapsibleMargins::Collapse(block_start, block_end);
+                let block_start =
+                    AdjoiningMargins::from_margin(self.block_flow.fragment.margin.block_start);
+                let block_end =
+                    AdjoiningMargins::from_margin(self.block_flow.fragment.margin.block_end);
+                self.block_flow.base.collapsible_margins =
+                    CollapsibleMargins::Collapse(block_start, block_end);
 
                 // TODO(stshine): assign proper static position for absolute descendants.
                 if (&*self as &Flow).contains_roots_of_absolute_flow_tree() {
                     // Assign block-sizes for all flows in this absolute flow tree.
                     // This is preorder because the block-size of an absolute flow may depend on
                     // the block-size of its containing block, which may also be an absolute flow.
-                    let assign_abs_b_sizes = AbsoluteAssignBSizesTraversal(layout_context.shared_context());
+                    let assign_abs_b_sizes =
+                        AbsoluteAssignBSizesTraversal(layout_context.shared_context());
                     assign_abs_b_sizes.traverse_absolute_flows(&mut *self);
                 }
-            }
-            Direction::Block =>{
-                self.block_flow
-                    .assign_block_size_block_base(layout_context,
-                                                  None,
-                                                  MarginsMayCollapseFlag::MarginsMayNotCollapse);
+            },
+            Direction::Block => {
+                self.block_flow.assign_block_size_block_base(
+                    layout_context,
+                    None,
+                    MarginsMayCollapseFlag::MarginsMayNotCollapse,
+                );
                 self.block_mode_assign_block_size();
-            }
+            },
         }
     }
 
     fn compute_stacking_relative_position(&mut self, layout_context: &LayoutContext) {
-        self.block_flow.compute_stacking_relative_position(layout_context)
+        self.block_flow
+            .compute_stacking_relative_position(layout_context)
     }
 
     fn place_float_if_applicable<'a>(&mut self) {
@@ -973,11 +1084,13 @@ impl Flow for FlexFlow {
     }
 
     fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
-        self.block_flow.update_late_computed_inline_position_if_necessary(inline_position)
+        self.block_flow
+            .update_late_computed_inline_position_if_necessary(inline_position)
     }
 
     fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
-        self.block_flow.update_late_computed_block_position_if_necessary(block_position)
+        self.block_flow
+            .update_late_computed_block_position_if_necessary(block_position)
     }
 
     fn build_display_list(&mut self, state: &mut DisplayListBuildState) {
@@ -1008,11 +1121,17 @@ impl Flow for FlexFlow {
         self.block_flow.generated_containing_block_size(flow)
     }
 
-    fn iterate_through_fragment_border_boxes(&self,
-                                             iterator: &mut FragmentBorderBoxIterator,
-                                             level: i32,
-                                             stacking_context_position: &Point2D<Au>) {
-        self.block_flow.iterate_through_fragment_border_boxes(iterator, level, stacking_context_position);
+    fn iterate_through_fragment_border_boxes(
+        &self,
+        iterator: &mut FragmentBorderBoxIterator,
+        level: i32,
+        stacking_context_position: &Point2D<Au>,
+    ) {
+        self.block_flow.iterate_through_fragment_border_boxes(
+            iterator,
+            level,
+            stacking_context_position,
+        );
     }
 
     fn mutate_fragments(&mut self, mutator: &mut FnMut(&mut Fragment)) {

components/layout/floats.rs

@@ -16,7 +16,7 @@ use style::values::computed::LengthOrPercentageOrAuto;
 #[derive(Clone, Copy, Debug, Serialize)]
 pub enum FloatKind {
     Left,
-    Right
+    Right,
 }
 
 impl FloatKind {
@@ -78,7 +78,12 @@ impl FloatList {
 
 impl fmt::Debug for FloatList {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "max_block_start={:?} floats={}", self.max_block_start, self.floats.len())?;
+        write!(
+            f,
+            "max_block_start={:?} floats={}",
+            self.max_block_start,
+            self.floats.len()
+        )?;
         for float in self.floats.iter() {
             write!(f, " {:?}", float)?;
         }
@@ -95,22 +100,29 @@ pub struct PlacementInfo {
     /// The maximum inline-end position of the float, generally determined by the containing block.
     pub max_inline_size: Au,
     /// The kind of float.
-    pub kind: FloatKind
+    pub kind: FloatKind,
 }
 
 impl fmt::Debug for PlacementInfo {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f,
-               "size={:?} ceiling={:?} max_inline_size={:?} kind={:?}",
-               self.size,
-               self.ceiling,
-               self.max_inline_size,
-               self.kind)
+        write!(
+            f,
+            "size={:?} ceiling={:?} max_inline_size={:?} kind={:?}",
+            self.size, self.ceiling, self.max_inline_size, self.kind
+        )
     }
 }
 
-fn range_intersect(block_start_1: Au, block_end_1: Au, block_start_2: Au, block_end_2: Au) -> (Au, Au) {
-    (max(block_start_1, block_start_2), min(block_end_1, block_end_2))
+fn range_intersect(
+    block_start_1: Au,
+    block_end_1: Au,
+    block_start_2: Au,
+    block_end_2: Au,
+) -> (Au, Au) {
+    (
+        max(block_start_1, block_start_2),
+        min(block_end_1, block_end_2),
+    )
 }
 
 /// Encapsulates information about floats. This is optimized to avoid allocation if there are
@@ -162,8 +174,12 @@ impl Floats {
     /// with inline-size small enough that it doesn't collide with any floats. max_x is the
     /// inline-size beyond which floats have no effect. (Generally this is the containing block
     /// inline-size.)
-    pub fn available_rect(&self, block_start: Au, block_size: Au, max_x: Au)
-                          -> Option<LogicalRect<Au>> {
+    pub fn available_rect(
+        &self,
+        block_start: Au,
+        block_size: Au,
+        max_x: Au,
+    ) -> Option<LogicalRect<Au>> {
         let list = &self.list;
         let block_start = block_start - self.offset.block;
 
@@ -186,30 +202,38 @@ impl Floats {
 
             debug!("float_pos: {:?}, float_size: {:?}", float_pos, float_size);
             match float.kind {
-                FloatKind::Left if float_pos.i + float_size.inline > max_inline_start &&
+                FloatKind::Left
+                    if float_pos.i + float_size.inline > max_inline_start &&
                         float_pos.b + float_size.block > block_start &&
-                        float_pos.b < block_start + block_size => {
+                        float_pos.b < block_start + block_size =>
+                {
                     max_inline_start = float_pos.i + float_size.inline;
 
                     l_block_start = Some(float_pos.b);
                     l_block_end = Some(float_pos.b + float_size.block);
 
-                    debug!("available_rect: collision with inline_start float: new \
-                            max_inline_start is {:?}",
-                           max_inline_start);
+                    debug!(
+                        "available_rect: collision with inline_start float: new \
+                         max_inline_start is {:?}",
+                        max_inline_start
+                    );
                 }
-                FloatKind::Right if float_pos.i < min_inline_end &&
-                       float_pos.b + float_size.block > block_start &&
-                       float_pos.b < block_start + block_size => {
+                FloatKind::Right
+                    if float_pos.i < min_inline_end &&
+                        float_pos.b + float_size.block > block_start &&
+                        float_pos.b < block_start + block_size =>
+                {
                     min_inline_end = float_pos.i;
 
                     r_block_start = Some(float_pos.b);
                     r_block_end = Some(float_pos.b + float_size.block);
-                    debug!("available_rect: collision with inline_end float: new min_inline_end \
-                            is {:?}",
-                            min_inline_end);
+                    debug!(
+                        "available_rect: collision with inline_end float: new min_inline_end \
+                         is {:?}",
+                        min_inline_end
+                    );
                 }
-                FloatKind::Left | FloatKind::Right => {}
+                FloatKind::Left | FloatKind::Right => {},
             }
         }
 
@@ -217,25 +241,28 @@ impl Floats {
         // If there are floats on both sides, take the intersection of the
         // two areas. Also make sure we never return a block-start smaller than the
         // given upper bound.
-        let (block_start, block_end) = match (r_block_start,
-                                              r_block_end,
-                                              l_block_start,
-                                              l_block_end) {
-            (Some(r_block_start), Some(r_block_end), Some(l_block_start), Some(l_block_end)) => {
-                range_intersect(max(block_start, r_block_start),
-                                r_block_end,
-                                max(block_start, l_block_start),
-                                l_block_end)
-            }
-            (None, None, Some(l_block_start), Some(l_block_end)) => {
-                (max(block_start, l_block_start), l_block_end)
-            }
-            (Some(r_block_start), Some(r_block_end), None, None) => {
-                (max(block_start, r_block_start), r_block_end)
-            }
-            (None, None, None, None) => return None,
-            _ => panic!("Reached unreachable state when computing float area")
-        };
+        let (block_start, block_end) =
+            match (r_block_start, r_block_end, l_block_start, l_block_end) {
+                (
+                    Some(r_block_start),
+                    Some(r_block_end),
+                    Some(l_block_start),
+                    Some(l_block_end),
+                ) => range_intersect(
+                    max(block_start, r_block_start),
+                    r_block_end,
+                    max(block_start, l_block_start),
+                    l_block_end,
+                ),
+                (None, None, Some(l_block_start), Some(l_block_end)) => {
+                    (max(block_start, l_block_start), l_block_end)
+                },
+                (Some(r_block_start), Some(r_block_end), None, None) => {
+                    (max(block_start, r_block_start), r_block_end)
+                },
+                (None, None, None, None) => return None,
+                _ => panic!("Reached unreachable state when computing float area"),
+            };
 
         // FIXME(eatkinson): This assertion is too strong and fails in some cases. It is OK to
         // return negative inline-sizes since we check against that inline-end away, but we should
@@ -244,11 +271,13 @@ impl Floats {
 
         assert!(block_start <= block_end, "Float position error");
 
-        Some(LogicalRect::new(self.writing_mode,
-                              max_inline_start + self.offset.inline,
-                              block_start + self.offset.block,
-                              min_inline_end - max_inline_start,
-                              block_end - block_start))
+        Some(LogicalRect::new(
+            self.writing_mode,
+            max_inline_start + self.offset.inline,
+            block_start + self.offset.block,
+            min_inline_end - max_inline_start,
+            block_end - block_start,
+        ))
     }
 
     /// Adds a new float to the list.
@@ -260,7 +289,7 @@ impl Floats {
                 Some(max_block_start) => max(info.ceiling, max_block_start + self.offset.block),
             },
             max_inline_size: info.max_inline_size,
-            kind: info.kind
+            kind: info.kind,
         };
 
         debug!("add_float: added float with info {:?}", new_info);
@@ -271,7 +300,7 @@ impl Floats {
                 self.place_between_floats(&new_info).start - self.offset,
                 info.size,
             ),
-            kind: info.kind
+            kind: info.kind,
         };
 
         self.list.floats = self.list.floats.prepend_elem(new_float);
@@ -284,8 +313,12 @@ impl Floats {
     /// Given the three sides of the bounding rectangle in the block-start direction, finds the
     /// largest block-size that will result in the rectangle not colliding with any floats. Returns
     /// `None` if that block-size is infinite.
-    fn max_block_size_for_bounds(&self, inline_start: Au, block_start: Au, inline_size: Au)
-                                 -> Option<Au> {
+    fn max_block_size_for_bounds(
+        &self,
+        inline_start: Au,
+        block_start: Au,
+        inline_size: Au,
+    ) -> Option<Au> {
         let list = &self.list;
 
         let block_start = block_start - self.offset.block;
@@ -294,10 +327,11 @@ impl Floats {
 
         for float in list.floats.iter() {
             if float.bounds.start.b + float.bounds.size.block > block_start &&
-                   float.bounds.start.i + float.bounds.size.inline > inline_start &&
-                   float.bounds.start.i < inline_start + inline_size {
-               let new_y = float.bounds.start.b;
-               max_block_size = Some(min(max_block_size.unwrap_or(new_y), new_y));
+                float.bounds.start.i + float.bounds.size.inline > inline_start &&
+                float.bounds.start.i < inline_start + inline_size
+            {
+                let new_y = float.bounds.start.b;
+                max_block_size = Some(min(max_block_size.unwrap_or(new_y), new_y));
             }
         }
 
@@ -318,85 +352,88 @@ impl Floats {
                         Au(0),
                         info.ceiling,
                         info.max_inline_size,
-                        MAX_AU)
-                }
+                        MAX_AU,
+                    )
+                },
                 FloatKind::Right => {
                     return LogicalRect::new(
                         self.writing_mode,
                         info.max_inline_size - info.size.inline,
                         info.ceiling,
                         info.max_inline_size,
-                        MAX_AU)
-                }
+                        MAX_AU,
+                    )
+                },
             }
         }
 
         // Can't go any higher than previous floats or previous elements in the document.
         let mut float_b = info.ceiling;
         loop {
-            let maybe_location = self.available_rect(float_b,
-                                                     info.size.block,
-                                                     info.max_inline_size);
-            debug!("place_float: got available rect: {:?} for block-pos: {:?}",
-                   maybe_location,
-                   float_b);
+            let maybe_location =
+                self.available_rect(float_b, info.size.block, info.max_inline_size);
+            debug!(
+                "place_float: got available rect: {:?} for block-pos: {:?}",
+                maybe_location, float_b
+            );
             match maybe_location {
                 // If there are no floats blocking us, return the current location
                 // TODO(eatkinson): integrate with overflow
                 None => {
                     return match info.kind {
-                        FloatKind::Left => {
-                            LogicalRect::new(
-                                self.writing_mode,
-                                Au(0),
-                                float_b,
-                                info.max_inline_size,
-                                MAX_AU)
-                        }
-                        FloatKind::Right => {
-                            LogicalRect::new(
-                                self.writing_mode,
-                                info.max_inline_size - info.size.inline,
-                                float_b,
-                                info.max_inline_size,
-                                MAX_AU)
-                        }
+                        FloatKind::Left => LogicalRect::new(
+                            self.writing_mode,
+                            Au(0),
+                            float_b,
+                            info.max_inline_size,
+                            MAX_AU,
+                        ),
+                        FloatKind::Right => LogicalRect::new(
+                            self.writing_mode,
+                            info.max_inline_size - info.size.inline,
+                            float_b,
+                            info.max_inline_size,
+                            MAX_AU,
+                        ),
                     }
-                }
+                },
                 Some(rect) => {
-                    assert_ne!(rect.start.b + rect.size.block, float_b,
-                               "Non-terminating float placement");
+                    assert_ne!(
+                        rect.start.b + rect.size.block,
+                        float_b,
+                        "Non-terminating float placement"
+                    );
 
                     // Place here if there is enough room
                     if rect.size.inline >= info.size.inline {
-                        let block_size = self.max_block_size_for_bounds(rect.start.i,
-                                                                        rect.start.b,
-                                                                        rect.size.inline);
+                        let block_size = self.max_block_size_for_bounds(
+                            rect.start.i,
+                            rect.start.b,
+                            rect.size.inline,
+                        );
                         let block_size = block_size.unwrap_or(MAX_AU);
                         return match info.kind {
-                            FloatKind::Left => {
-                                LogicalRect::new(
-                                    self.writing_mode,
-                                    rect.start.i,
-                                    float_b,
-                                    rect.size.inline,
-                                    block_size)
-                            }
-                            FloatKind::Right => {
-                                LogicalRect::new(
-                                    self.writing_mode,
-                                    rect.start.i + rect.size.inline - info.size.inline,
-                                    float_b,
-                                    rect.size.inline,
-                                    block_size)
-                            }
-                        }
+                            FloatKind::Left => LogicalRect::new(
+                                self.writing_mode,
+                                rect.start.i,
+                                float_b,
+                                rect.size.inline,
+                                block_size,
+                            ),
+                            FloatKind::Right => LogicalRect::new(
+                                self.writing_mode,
+                                rect.start.i + rect.size.inline - info.size.inline,
+                                float_b,
+                                rect.size.inline,
+                                block_size,
+                            ),
+                        };
                     }
 
                     // Try to place at the next-lowest location.
                     // Need to be careful of fencepost errors.
                     float_b = rect.start.b + rect.size.block;
-                }
+                },
             }
         }
     }
@@ -411,8 +448,8 @@ impl Floats {
                 (ClearType::Both, _) => {
                     let b = self.offset.block + float.bounds.start.b + float.bounds.size.block;
                     clearance = max(clearance, b);
-                }
-                _ => {}
+                },
+                _ => {},
             }
         }
         clearance
@@ -486,14 +523,20 @@ impl SpeculatedFloatPlacement {
                     }
                 }
 
-                self.left = max(self.left, block_flow.base.speculated_float_placement_in.left);
-                self.right = max(self.right, block_flow.base.speculated_float_placement_in.right);
+                self.left = max(
+                    self.left,
+                    block_flow.base.speculated_float_placement_in.left,
+                );
+                self.right = max(
+                    self.right,
+                    block_flow.base.speculated_float_placement_in.right,
+                );
             }
         }
 
         let base_flow = flow.base();
         if !base_flow.flags.is_float() {
-            return
+            return;
         }
 
         let mut float_inline_size = base_flow.intrinsic_inline_sizes.preferred_inline_size;
@@ -504,7 +547,8 @@ impl SpeculatedFloatPlacement {
                 // that the layout traversal logic will know that objects later in the document
                 // might flow around this float.
                 if let LengthOrPercentageOrAuto::Percentage(percentage) =
-                        flow.as_block().fragment.style.content_inline_size() {
+                    flow.as_block().fragment.style.content_inline_size()
+                {
                     if percentage.0 > 0.0 {
                         float_inline_size = Au::from_px(1)
                     }
@@ -513,7 +557,7 @@ impl SpeculatedFloatPlacement {
         }
 
         match base_flow.flags.float_kind() {
-            StyleFloat::None => {}
+            StyleFloat::None => {},
             StyleFloat::Left => self.left = self.left + float_inline_size,
             StyleFloat::Right => self.right = self.right + float_inline_size,
         }
@@ -522,17 +566,18 @@ impl SpeculatedFloatPlacement {
     /// Given a flow, computes the speculated inline size of the floats in of its first child.
     pub fn compute_floats_in_for_first_child(parent_flow: &mut Flow) -> SpeculatedFloatPlacement {
         if !parent_flow.is_block_like() {
-            return parent_flow.base().speculated_float_placement_in
+            return parent_flow.base().speculated_float_placement_in;
         }
 
         let parent_block_flow = parent_flow.as_block();
         if parent_block_flow.formatting_context_type() != FormattingContextType::None {
-            return SpeculatedFloatPlacement::zero()
+            return SpeculatedFloatPlacement::zero();
         }
 
         let mut placement = parent_block_flow.base.speculated_float_placement_in;
-        let speculated_inline_content_edge_offsets =
-            parent_block_flow.fragment.guess_inline_content_edge_offsets();
+        let speculated_inline_content_edge_offsets = parent_block_flow
+            .fragment
+            .guess_inline_content_edge_offsets();
 
         if speculated_inline_content_edge_offsets.start > Au(0) {
             placement.left = if placement.left > speculated_inline_content_edge_offsets.start {
@@ -552,4 +597,3 @@ impl SpeculatedFloatPlacement {
         placement
     }
 }
-

components/layout/flow.rs

@@ -251,11 +251,15 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
     /// and return a new flow similar to `self` with the rest of the content.
     ///
     /// The default is to make a flow "atomic": it can not be fragmented.
-    fn fragment(&mut self,
-                layout_context: &LayoutContext,
-                _fragmentation_context: Option<FragmentationContext>)
-                -> Option<Arc<Flow>> {
-        fn recursive_assign_block_size<F: ?Sized + Flow + GetBaseFlow>(flow: &mut F, ctx: &LayoutContext) {
+    fn fragment(
+        &mut self,
+        layout_context: &LayoutContext,
+        _fragmentation_context: Option<FragmentationContext>,
+    ) -> Option<Arc<Flow>> {
+        fn recursive_assign_block_size<F: ?Sized + Flow + GetBaseFlow>(
+            flow: &mut F,
+            ctx: &LayoutContext,
+        ) {
             for child in flow.mut_base().child_iter_mut() {
                 recursive_assign_block_size(child, ctx)
             }
@@ -277,17 +281,20 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
     /// `parent_thread_id` is the thread ID of the parent. This is used for the layout tinting
     /// debug mode; if the block size of this flow was determined by its parent, we should treat
     /// it as laid out by its parent.
-    fn assign_block_size_for_inorder_child_if_necessary(&mut self,
-                                                        layout_context: &LayoutContext,
-                                                        parent_thread_id: u8,
-                                                        _content_box: LogicalRect<Au>)
-                                                        -> bool {
-        let might_have_floats_in_or_out = self.base().might_have_floats_in() ||
-            self.base().might_have_floats_out();
+    fn assign_block_size_for_inorder_child_if_necessary(
+        &mut self,
+        layout_context: &LayoutContext,
+        parent_thread_id: u8,
+        _content_box: LogicalRect<Au>,
+    ) -> bool {
+        let might_have_floats_in_or_out =
+            self.base().might_have_floats_in() || self.base().might_have_floats_out();
         if might_have_floats_in_or_out {
             self.mut_base().thread_id = parent_thread_id;
             self.assign_block_size(layout_context);
-            self.mut_base().restyle_damage.remove(ServoRestyleDamage::REFLOW_OUT_OF_FLOW | ServoRestyleDamage::REFLOW);
+            self.mut_base()
+                .restyle_damage
+                .remove(ServoRestyleDamage::REFLOW_OUT_OF_FLOW | ServoRestyleDamage::REFLOW);
         }
         might_have_floats_in_or_out
     }
@@ -295,23 +302,32 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
     fn get_overflow_in_parent_coordinates(&self) -> Overflow {
         // FIXME(#2795): Get the real container size.
         let container_size = Size2D::zero();
-        let position = self.base().position.to_physical(self.base().writing_mode, container_size);
+        let position = self
+            .base()
+            .position
+            .to_physical(self.base().writing_mode, container_size);
 
         let mut overflow = self.base().overflow;
 
         match self.class() {
-            FlowClass::Block | FlowClass::TableCaption | FlowClass::TableCell => {}
+            FlowClass::Block | FlowClass::TableCaption | FlowClass::TableCell => {},
             _ => {
                 overflow.translate(&position.origin.to_vector());
                 return overflow;
-            }
+            },
         }
 
         let border_box = self.as_block().fragment.stacking_relative_border_box(
             &self.base().stacking_relative_position,
-            &self.base().early_absolute_position_info.relative_containing_block_size,
-            self.base().early_absolute_position_info.relative_containing_block_mode,
-            CoordinateSystem::Own);
+            &self
+                .base()
+                .early_absolute_position_info
+                .relative_containing_block_size,
+            self.base()
+                .early_absolute_position_info
+                .relative_containing_block_mode,
+            CoordinateSystem::Own,
+        );
         if StyleOverflow::Visible != self.as_block().fragment.style.get_box().overflow_x {
             overflow.paint.origin.x = Au(0);
             overflow.paint.size.width = border_box.size.width;
@@ -325,24 +341,35 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
             overflow.scroll.size.height = border_box.size.height;
         }
 
-        if !self.as_block().fragment.establishes_stacking_context() ||
-           self.as_block().fragment.style.get_box().transform.0.is_empty() {
+        if !self.as_block().fragment.establishes_stacking_context() || self
+            .as_block()
+            .fragment
+            .style
+            .get_box()
+            .transform
+            .0
+            .is_empty()
+        {
             overflow.translate(&position.origin.to_vector());
             return overflow;
         }
 
         // TODO: Take into account 3d transforms, even though it's a fairly
         // uncommon case.
-        let transform_2d = self.as_block()
-                               .fragment
-                               .transform_matrix(&position)
-                               .unwrap_or(LayoutTransform::identity())
-                               .to_2d().to_untyped();
+        let transform_2d = self
+            .as_block()
+            .fragment
+            .transform_matrix(&position)
+            .unwrap_or(LayoutTransform::identity())
+            .to_2d()
+            .to_untyped();
         let transformed_overflow = Overflow {
-            paint: f32_rect_to_au_rect(transform_2d.transform_rect(
-                                       &au_rect_to_f32_rect(overflow.paint))),
-            scroll: f32_rect_to_au_rect(transform_2d.transform_rect(
-                                       &au_rect_to_f32_rect(overflow.scroll))),
+            paint: f32_rect_to_au_rect(
+                transform_2d.transform_rect(&au_rect_to_f32_rect(overflow.paint)),
+            ),
+            scroll: f32_rect_to_au_rect(
+                transform_2d.transform_rect(&au_rect_to_f32_rect(overflow.scroll)),
+            ),
         };
 
         // TODO: We are taking the union of the overflow and transformed overflow here, which
@@ -369,14 +396,12 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
         // Calculate overflow on a per-fragment basis.
         let mut overflow = self.compute_overflow();
         match self.class() {
-            FlowClass::Block |
-            FlowClass::TableCaption |
-            FlowClass::TableCell => {
+            FlowClass::Block | FlowClass::TableCaption | FlowClass::TableCell => {
                 for kid in self.mut_base().children.iter_mut() {
                     overflow.union(&kid.get_overflow_in_parent_coordinates());
                 }
-            }
-            _ => {}
+            },
+            _ => {},
         }
         self.mut_base().overflow = overflow
     }
@@ -396,17 +421,21 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
     /// Iterates through border boxes of all of this flow's fragments.
     /// Level provides a zero based index indicating the current
     /// depth of the flow tree during fragment iteration.
-    fn iterate_through_fragment_border_boxes(&self,
-                                             iterator: &mut FragmentBorderBoxIterator,
-                                             level: i32,
-                                             stacking_context_position: &Point2D<Au>);
+    fn iterate_through_fragment_border_boxes(
+        &self,
+        iterator: &mut FragmentBorderBoxIterator,
+        level: i32,
+        stacking_context_position: &Point2D<Au>,
+    );
 
     /// Mutably iterates through fragments in this flow.
     fn mutate_fragments(&mut self, mutator: &mut FnMut(&mut Fragment));
 
-    fn compute_collapsible_block_start_margin(&mut self,
-                                              _layout_context: &mut LayoutContext,
-                                              _margin_collapse_info: &mut MarginCollapseInfo) {
+    fn compute_collapsible_block_start_margin(
+        &mut self,
+        _layout_context: &mut LayoutContext,
+        _margin_collapse_info: &mut MarginCollapseInfo,
+    ) {
         // The default implementation is a no-op.
     }
 
@@ -436,8 +465,10 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
     }
 
     fn contains_positioned_fragments(&self) -> bool {
-        self.contains_relatively_positioned_fragments() ||
-            self.base().flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED)
+        self.contains_relatively_positioned_fragments() || self
+            .base()
+            .flags
+            .contains(FlowFlags::IS_ABSOLUTELY_POSITIONED)
     }
 
     fn contains_relatively_positioned_fragments(&self) -> bool {
@@ -476,7 +507,7 @@ pub trait Flow: HasBaseFlow + fmt::Debug + Sync + Send + 'static {
     /// Print any extra children (such as fragments) contained in this Flow
     /// for debugging purposes. Any items inserted into the tree will become
     /// children of this flow.
-    fn print_extra_flow_children(&self, _: &mut PrintTree) { }
+    fn print_extra_flow_children(&self, _: &mut PrintTree) {}
 
     fn clipping_and_scrolling(&self) -> ClippingAndScrolling {
         match self.base().clipping_and_scrolling {
@@ -566,8 +597,10 @@ pub trait MutableOwnedFlowUtils {
     ///     </span>
     /// </div>
     /// ```
-    fn take_applicable_absolute_descendants(&mut self,
-                                            absolute_descendants: &mut AbsoluteDescendants);
+    fn take_applicable_absolute_descendants(
+        &mut self,
+        absolute_descendants: &mut AbsoluteDescendants,
+    );
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Serialize)]
@@ -590,9 +623,15 @@ pub enum FlowClass {
 impl FlowClass {
     fn is_block_like(self) -> bool {
         match self {
-            FlowClass::Block | FlowClass::ListItem | FlowClass::Table | FlowClass::TableRowGroup |
-            FlowClass::TableRow | FlowClass::TableCaption | FlowClass::TableCell |
-            FlowClass::TableWrapper | FlowClass::Flex => true,
+            FlowClass::Block |
+            FlowClass::ListItem |
+            FlowClass::Table |
+            FlowClass::TableRowGroup |
+            FlowClass::TableRow |
+            FlowClass::TableCaption |
+            FlowClass::TableCell |
+            FlowClass::TableWrapper |
+            FlowClass::Flex => true,
             _ => false,
         }
     }
@@ -663,7 +702,7 @@ impl FlowFlags {
     #[inline]
     pub fn set_text_align(&mut self, value: TextAlign) {
         *self = (*self & !FlowFlags::TEXT_ALIGN) |
-                FlowFlags::from_bits((value as u32) << TEXT_ALIGN_SHIFT).unwrap();
+            FlowFlags::from_bits((value as u32) << TEXT_ALIGN_SHIFT).unwrap();
     }
 
     #[inline]
@@ -776,7 +815,9 @@ pub struct AbsoluteDescendantIter<'a> {
 impl<'a> Iterator for AbsoluteDescendantIter<'a> {
     type Item = &'a mut Flow;
     fn next(&mut self) -> Option<&'a mut Flow> {
-        self.iter.next().map(|info| FlowRef::deref_mut(&mut info.flow))
+        self.iter
+            .next()
+            .map(|info| FlowRef::deref_mut(&mut info.flow))
     }
 
     fn size_hint(&self) -> (usize, Option<usize>) {
@@ -953,22 +994,32 @@ impl fmt::Debug for BaseFlow {
             "".to_owned()
         };
 
-        write!(f,
-               "\nsc={:?}\
-                \npos={:?}{}{}\
-                \nfloatspec-in={:?}\
-                \nfloatspec-out={:?}\
-                \noverflow={:?}{}{}{}",
-               self.stacking_context_id,
-               self.position,
-               if self.flags.contains(FlowFlags::FLOATS_LEFT) { "FL" } else { "" },
-               if self.flags.contains(FlowFlags::FLOATS_RIGHT) { "FR" } else { "" },
-               self.speculated_float_placement_in,
-               self.speculated_float_placement_out,
-               self.overflow,
-               child_count_string,
-               absolute_descendants_string,
-               damage_string)
+        write!(
+            f,
+            "\nsc={:?}\
+             \npos={:?}{}{}\
+             \nfloatspec-in={:?}\
+             \nfloatspec-out={:?}\
+             \noverflow={:?}{}{}{}",
+            self.stacking_context_id,
+            self.position,
+            if self.flags.contains(FlowFlags::FLOATS_LEFT) {
+                "FL"
+            } else {
+                ""
+            },
+            if self.flags.contains(FlowFlags::FLOATS_RIGHT) {
+                "FR"
+            } else {
+                ""
+            },
+            self.speculated_float_placement_in,
+            self.speculated_float_placement_out,
+            self.overflow,
+            child_count_string,
+            absolute_descendants_string,
+            damage_string
+        )
     }
 }
 
@@ -976,7 +1027,10 @@ impl Serialize for BaseFlow {
     fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
         let mut serializer = serializer.serialize_struct("base", 5)?;
         serializer.serialize_field("id", &self.debug_id())?;
-        serializer.serialize_field("stacking_relative_position", &self.stacking_relative_position)?;
+        serializer.serialize_field(
+            "stacking_relative_position",
+            &self.stacking_relative_position,
+        )?;
         serializer.serialize_field("intrinsic_inline_sizes", &self.intrinsic_inline_sizes)?;
         serializer.serialize_field("position", &self.position)?;
         serializer.serialize_field("children", &self.children)?;
@@ -996,10 +1050,11 @@ pub enum ForceNonfloatedFlag {
 
 impl BaseFlow {
     #[inline]
-    pub fn new(style: Option<&ComputedValues>,
-               writing_mode: WritingMode,
-               force_nonfloated: ForceNonfloatedFlag)
-               -> BaseFlow {
+    pub fn new(
+        style: Option<&ComputedValues>,
+        writing_mode: WritingMode,
+        force_nonfloated: ForceNonfloatedFlag,
+    ) -> BaseFlow {
         let mut flags = FlowFlags::empty();
         match style {
             Some(style) => {
@@ -1013,41 +1068,47 @@ impl BaseFlow {
 
                         let logical_position = style.logical_position();
                         if logical_position.inline_start == LengthOrPercentageOrAuto::Auto &&
-                                logical_position.inline_end == LengthOrPercentageOrAuto::Auto {
+                            logical_position.inline_end == LengthOrPercentageOrAuto::Auto
+                        {
                             flags.insert(FlowFlags::INLINE_POSITION_IS_STATIC);
                         }
                         if logical_position.block_start == LengthOrPercentageOrAuto::Auto &&
-                                logical_position.block_end == LengthOrPercentageOrAuto::Auto {
+                            logical_position.block_end == LengthOrPercentageOrAuto::Auto
+                        {
                             flags.insert(FlowFlags::BLOCK_POSITION_IS_STATIC);
                         }
-                    }
-                    _ => flags.insert(FlowFlags::BLOCK_POSITION_IS_STATIC | FlowFlags::INLINE_POSITION_IS_STATIC),
+                    },
+                    _ => flags.insert(
+                        FlowFlags::BLOCK_POSITION_IS_STATIC | FlowFlags::INLINE_POSITION_IS_STATIC,
+                    ),
                 }
 
                 if force_nonfloated == ForceNonfloatedFlag::FloatIfNecessary {
                     match style.get_box().float {
-                        Float::None => {}
+                        Float::None => {},
                         Float::Left => flags.insert(FlowFlags::FLOATS_LEFT),
                         Float::Right => flags.insert(FlowFlags::FLOATS_RIGHT),
                     }
                 }
 
                 match style.get_box().clear {
-                    Clear::None => {}
+                    Clear::None => {},
                     Clear::Left => flags.insert(FlowFlags::CLEARS_LEFT),
                     Clear::Right => flags.insert(FlowFlags::CLEARS_RIGHT),
                     Clear::Both => {
                         flags.insert(FlowFlags::CLEARS_LEFT);
                         flags.insert(FlowFlags::CLEARS_RIGHT);
-                    }
+                    },
                 }
 
                 if !style.get_counters().counter_reset.is_empty() ||
-                        !style.get_counters().counter_increment.is_empty() {
+                    !style.get_counters().counter_increment.is_empty()
+                {
                     flags.insert(FlowFlags::AFFECTS_COUNTERS)
                 }
-            }
-            None => flags.insert(FlowFlags::BLOCK_POSITION_IS_STATIC | FlowFlags::INLINE_POSITION_IS_STATIC),
+            },
+            None => flags
+                .insert(FlowFlags::BLOCK_POSITION_IS_STATIC | FlowFlags::INLINE_POSITION_IS_STATIC),
         }
 
         // New flows start out as fully damaged.
@@ -1089,17 +1150,24 @@ impl BaseFlow {
     pub fn update_flags_if_needed(&mut self, style: &ComputedValues) {
         // For absolutely-positioned flows, changes to top/bottom/left/right can cause these flags
         // to get out of date:
-        if self.restyle_damage.contains(ServoRestyleDamage::REFLOW_OUT_OF_FLOW) {
+        if self
+            .restyle_damage
+            .contains(ServoRestyleDamage::REFLOW_OUT_OF_FLOW)
+        {
             // Note: We don't need to check whether IS_ABSOLUTELY_POSITIONED has changed, because
             // changes to the 'position' property trigger flow reconstruction.
             if self.flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED) {
                 let logical_position = style.logical_position();
-                self.flags.set(FlowFlags::INLINE_POSITION_IS_STATIC,
+                self.flags.set(
+                    FlowFlags::INLINE_POSITION_IS_STATIC,
                     logical_position.inline_start == LengthOrPercentageOrAuto::Auto &&
-                    logical_position.inline_end == LengthOrPercentageOrAuto::Auto);
-                self.flags.set(FlowFlags::BLOCK_POSITION_IS_STATIC,
+                        logical_position.inline_end == LengthOrPercentageOrAuto::Auto,
+                );
+                self.flags.set(
+                    FlowFlags::BLOCK_POSITION_IS_STATIC,
                     logical_position.block_start == LengthOrPercentageOrAuto::Auto &&
-                    logical_position.block_end == LengthOrPercentageOrAuto::Auto);
+                        logical_position.block_end == LengthOrPercentageOrAuto::Auto,
+                );
             }
         }
     }
@@ -1108,8 +1176,10 @@ impl BaseFlow {
     pub fn clone_with_children(&self, children: FlowList) -> BaseFlow {
         BaseFlow {
             children: children,
-            restyle_damage: self.restyle_damage | ServoRestyleDamage::REPAINT |
-                            ServoRestyleDamage::REFLOW_OUT_OF_FLOW | ServoRestyleDamage::REFLOW,
+            restyle_damage: self.restyle_damage |
+                ServoRestyleDamage::REPAINT |
+                ServoRestyleDamage::REFLOW_OUT_OF_FLOW |
+                ServoRestyleDamage::REFLOW,
             parallel: FlowParallelInfo::new(),
             floats: self.floats.clone(),
             abs_descendants: self.abs_descendants.clone(),
@@ -1138,8 +1208,10 @@ impl BaseFlow {
         return self as *const BaseFlow as usize;
     }
 
-    pub fn collect_stacking_contexts_for_children(&mut self,
-                                                  state: &mut StackingContextCollectionState) {
+    pub fn collect_stacking_contexts_for_children(
+        &mut self,
+        state: &mut StackingContextCollectionState,
+    ) {
         for kid in self.children.iter_mut() {
             kid.collect_stacking_contexts(state);
         }
@@ -1157,15 +1229,17 @@ impl BaseFlow {
             self.speculated_float_placement_out.right > Au(0)
     }
 
-
     /// Compute the fragment position relative to the parent stacking context. If the fragment
     /// itself establishes a stacking context, then the origin of its position will be (0, 0)
     /// for the purposes of this computation.
     pub fn stacking_relative_border_box_for_display_list(&self, fragment: &Fragment) -> Rect<Au> {
         fragment.stacking_relative_border_box(
             &self.stacking_relative_position,
-            &self.early_absolute_position_info.relative_containing_block_size,
-            self.early_absolute_position_info.relative_containing_block_mode,
+            &self
+                .early_absolute_position_info
+                .relative_containing_block_size,
+            self.early_absolute_position_info
+                .relative_containing_block_mode,
             CoordinateSystem::Own,
         )
     }
@@ -1182,8 +1256,10 @@ impl<'a> ImmutableFlowUtils for &'a Flow {
     /// table-column-group flow, or table-caption flow.
     fn is_proper_table_child(self) -> bool {
         match self.class() {
-            FlowClass::TableRow | FlowClass::TableRowGroup |
-                FlowClass::TableColGroup | FlowClass::TableCaption => true,
+            FlowClass::TableRow |
+            FlowClass::TableRowGroup |
+            FlowClass::TableColGroup |
+            FlowClass::TableCaption => true,
             _ => false,
         }
     }
@@ -1239,9 +1315,13 @@ impl<'a> ImmutableFlowUtils for &'a Flow {
     /// Returns true if this flow is one of table-related flows.
     fn is_table_kind(self) -> bool {
         match self.class() {
-            FlowClass::TableWrapper | FlowClass::Table |
-                FlowClass::TableColGroup | FlowClass::TableRowGroup |
-                FlowClass::TableRow | FlowClass::TableCaption | FlowClass::TableCell => true,
+            FlowClass::TableWrapper |
+            FlowClass::Table |
+            FlowClass::TableColGroup |
+            FlowClass::TableRowGroup |
+            FlowClass::TableRow |
+            FlowClass::TableCaption |
+            FlowClass::TableCell => true,
             _ => false,
         }
     }
@@ -1268,7 +1348,7 @@ impl<'a> ImmutableFlowUtils for &'a Flow {
             FlowClass::Block | FlowClass::TableCaption | FlowClass::TableCell => {
                 // FIXME: Actually check the type of the node
                 self.child_count() != 0
-            }
+            },
             _ => false,
         }
     }
@@ -1307,13 +1387,13 @@ impl<'a> ImmutableFlowUtils for &'a Flow {
 
     fn floats_might_flow_through(self) -> bool {
         if !self.base().might_have_floats_in() && !self.base().might_have_floats_out() {
-            return false
+            return false;
         }
         if self.is_root() {
-            return false
+            return false;
         }
         if !self.is_block_like() {
-            return true
+            return true;
         }
         self.as_block().formatting_context_type() == FormattingContextType::None
     }
@@ -1322,12 +1402,16 @@ impl<'a> ImmutableFlowUtils for &'a Flow {
         for kid in self.base().children.iter().rev() {
             if kid.is_inline_flow() {
                 if let Some(baseline_offset) = kid.as_inline().baseline_offset_of_last_line() {
-                    return Some(kid.base().position.start.b + baseline_offset)
+                    return Some(kid.base().position.start.b + baseline_offset);
                 }
             }
-            if kid.is_block_like() && !kid.base().flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED) {
+            if kid.is_block_like() && !kid
+                .base()
+                .flags
+                .contains(FlowFlags::IS_ABSOLUTELY_POSITIONED)
+            {
                 if let Some(baseline_offset) = kid.baseline_offset_of_last_line_box_in_flow() {
-                    return Some(kid.base().position.start.b + baseline_offset)
+                    return Some(kid.base().position.start.b + baseline_offset);
                 }
             }
         }
@@ -1374,17 +1458,19 @@ impl MutableOwnedFlowUtils for FlowRef {
     ///     </span>
     /// </div>
     /// ```
-    fn take_applicable_absolute_descendants(&mut self,
-                                            absolute_descendants: &mut AbsoluteDescendants) {
+    fn take_applicable_absolute_descendants(
+        &mut self,
+        absolute_descendants: &mut AbsoluteDescendants,
+    ) {
         let mut applicable_absolute_descendants = AbsoluteDescendants::new();
         for absolute_descendant in absolute_descendants.descendant_links.iter() {
             if absolute_descendant.has_reached_containing_block {
                 applicable_absolute_descendants.push(absolute_descendant.flow.clone());
             }
         }
-        absolute_descendants.descendant_links.retain(|descendant| {
-            !descendant.has_reached_containing_block
-        });
+        absolute_descendants
+            .descendant_links
+            .retain(|descendant| !descendant.has_reached_containing_block);
 
         let this = self.clone();
         let base = FlowRef::deref_mut(self).mut_base();
@@ -1412,9 +1498,7 @@ pub struct ContainingBlockLink {
 
 impl ContainingBlockLink {
     fn new() -> ContainingBlockLink {
-        ContainingBlockLink {
-            link: None,
-        }
+        ContainingBlockLink { link: None }
     }
 
     fn set(&mut self, link: FlowRef) {
@@ -1424,34 +1508,38 @@ impl ContainingBlockLink {
     #[inline]
     pub fn generated_containing_block_size(&self, for_flow: OpaqueFlow) -> LogicalSize<Au> {
         match self.link {
-            None => {
-                panic!("Link to containing block not established; perhaps you forgot to call \
-                        `set_absolute_descendants`?")
-            }
+            None => panic!(
+                "Link to containing block not established; perhaps you forgot to call \
+                 `set_absolute_descendants`?"
+            ),
             Some(ref link) => {
                 let flow = link.upgrade().unwrap();
                 flow.generated_containing_block_size(for_flow)
-            }
+            },
         }
     }
 
     #[inline]
-    pub fn explicit_block_containing_size(&self, shared_context: &SharedStyleContext) -> Option<Au> {
+    pub fn explicit_block_containing_size(
+        &self,
+        shared_context: &SharedStyleContext,
+    ) -> Option<Au> {
         match self.link {
-            None => {
-                panic!("Link to containing block not established; perhaps you forgot to call \
-                        `set_absolute_descendants`?")
-            }
+            None => panic!(
+                "Link to containing block not established; perhaps you forgot to call \
+                 `set_absolute_descendants`?"
+            ),
             Some(ref link) => {
                 let flow = link.upgrade().unwrap();
                 if flow.is_block_like() {
-                    flow.as_block().explicit_block_containing_size(shared_context)
+                    flow.as_block()
+                        .explicit_block_containing_size(shared_context)
                 } else if flow.is_inline_flow() {
                     Some(flow.as_inline().minimum_line_metrics.space_above_baseline)
                 } else {
                     None
                 }
-            }
+            },
         }
     }
 }

components/layout/flow_list.rs

@@ -38,10 +38,13 @@ impl Serialize for FlowList {
                 FlowClass::TableRow => to_value(f.as_table_row()).unwrap(),
                 FlowClass::TableCell => to_value(f.as_table_cell()).unwrap(),
                 FlowClass::Flex => to_value(f.as_flex()).unwrap(),
-                FlowClass::ListItem | FlowClass::TableColGroup | FlowClass::TableCaption |
-                FlowClass::Multicol | FlowClass::MulticolColumn => {
+                FlowClass::ListItem |
+                FlowClass::TableColGroup |
+                FlowClass::TableCaption |
+                FlowClass::Multicol |
+                FlowClass::MulticolColumn => {
                     Value::Null // Not implemented yet
-                }
+                },
             };
             flow_val.insert("data".to_owned(), data);
             serializer.serialize_element(&flow_val)?;
@@ -152,7 +155,7 @@ impl FlowList {
     #[inline]
     pub fn split_off(&mut self, i: usize) -> Self {
         FlowList {
-            flows: self.flows.split_off(i)
+            flows: self.flows.split_off(i),
         }
     }
 }

components/layout/flow_ref.rs

@@ -8,7 +8,6 @@
 //! be superfluous. This design is largely duplicating logic of Arc<T> and
 //! Weak<T>; please see comments there for details.
 
-
 use flow::Flow;
 use std::ops::Deref;
 use std::sync::{Arc, Weak};
@@ -63,4 +62,3 @@ impl WeakFlowRef {
         self.0.upgrade().map(FlowRef)
     }
 }
-

components/layout/generated_content.rs

@@ -25,73 +25,103 @@ use text::TextRunScanner;
 use traversal::InorderFlowTraversal;
 
 // Decimal styles per CSS-COUNTER-STYLES § 6.1:
-static DECIMAL: [char; 10] = [ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' ];
+static DECIMAL: [char; 10] = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
 // TODO(pcwalton): `decimal-leading-zero`
-static ARABIC_INDIC: [char; 10] = [ '٠', '١', '٢', '٣', '٤', '٥', '٦', '٧', '٨', '٩' ];
+static ARABIC_INDIC: [char; 10] = ['٠', '١', '٢', '٣', '٤', '٥', '٦', '٧', '٨', '٩'];
 // TODO(pcwalton): `armenian`, `upper-armenian`, `lower-armenian`
-static BENGALI: [char; 10] = [ '০', '১', '২', '৩', '৪', '৫', '৬', '৭', '৮', '৯' ];
-static CAMBODIAN: [char; 10] = [ '០', '១', '២', '៣', '៤', '៥', '៦', '៧', '៨', '៩' ];
+static BENGALI: [char; 10] = [
+    '০', '১', '২', '৩', '৪', '৫', '৬', '৭', '৮', '৯',
+];
+static CAMBODIAN: [char; 10] = [
+    '០', '១', '២', '៣', '៤', '៥', '៦', '៧', '៨', '៩',
+];
 // TODO(pcwalton): Suffix for CJK decimal.
-static CJK_DECIMAL: [char; 10] = [ '〇', '一', '二', '三', '四', '五', '六', '七', '八', '九' ];
-static DEVANAGARI: [char; 10] = [ '०', '१', '२', '३', '४', '५', '६', '७', '८', '९' ];
+static CJK_DECIMAL: [char; 10] = [
+    '〇', '一', '二', '三', '四', '五', '六', '七', '八', '九',
+];
+static DEVANAGARI: [char; 10] = [
+    '०', '१', '२', '३', '४', '५', '६', '७', '८', '९',
+];
 // TODO(pcwalton): `georgian`
-static GUJARATI: [char; 10] = ['૦', '૧', '૨', '૩', '૪', '૫', '૬', '૭', '૮', '૯'];
-static GURMUKHI: [char; 10] = ['੦', '੧', '੨', '੩', '੪', '੫', '੬', '੭', '੮', '੯'];
+static GUJARATI: [char; 10] = [
+    '૦', '૧', '૨', '૩', '૪', '૫', '૬', '૭', '૮', '૯',
+];
+static GURMUKHI: [char; 10] = [
+    '੦', '੧', '੨', '੩', '੪', '੫', '੬', '੭', '੮', '੯',
+];
 // TODO(pcwalton): `hebrew`
-static KANNADA: [char; 10] = ['೦', '೧', '೨', '೩', '೪', '೫', '೬', '೭', '೮', '೯'];
-static LAO: [char; 10] = ['໐', '໑', '໒', '໓', '໔', '໕', '໖', '໗', '໘', '໙'];
-static MALAYALAM: [char; 10] = ['൦', '൧', '൨', '൩', '൪', '൫', '൬', '൭', '൮', '൯'];
-static MONGOLIAN: [char; 10] = ['᠐', '᠑', '᠒', '᠓', '᠔', '᠕', '᠖', '᠗', '᠘', '᠙'];
-static MYANMAR: [char; 10] = ['၀', '၁', '၂', '၃', '၄', '၅', '၆', '၇', '၈', '၉'];
-static ORIYA: [char; 10] = ['୦', '୧', '୨', '୩', '୪', '୫', '୬', '୭', '୮', '୯'];
+static KANNADA: [char; 10] = [
+    '೦', '೧', '೨', '೩', '೪', '೫', '೬', '೭', '೮', '೯',
+];
+static LAO: [char; 10] = [
+    '໐', '໑', '໒', '໓', '໔', '໕', '໖', '໗', '໘', '໙',
+];
+static MALAYALAM: [char; 10] = [
+    '൦', '൧', '൨', '൩', '൪', '൫', '൬', '൭', '൮', '൯',
+];
+static MONGOLIAN: [char; 10] = [
+    '᠐', '᠑', '᠒', '᠓', '᠔', '᠕', '᠖', '᠗', '᠘', '᠙',
+];
+static MYANMAR: [char; 10] = [
+    '၀', '၁', '၂', '၃', '၄', '၅', '၆', '၇', '၈', '၉',
+];
+static ORIYA: [char; 10] = [
+    '୦', '୧', '୨', '୩', '୪', '୫', '୬', '୭', '୮', '୯',
+];
 static PERSIAN: [char; 10] = ['۰', '۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹'];
 // TODO(pcwalton): `lower-roman`, `upper-roman`
-static TELUGU: [char; 10] = ['౦', '౧', '౨', '౩', '౪', '౫', '౬', '౭', '౮', '౯'];
-static THAI: [char; 10] = ['๐', '๑', '๒', '๓', '๔', '๕', '๖', '๗', '๘', '๙'];
-static TIBETAN: [char; 10] = ['༠', '༡', '༢', '༣', '༤', '༥', '༦', '༧', '༨', '༩'];
+static TELUGU: [char; 10] = [
+    '౦', '౧', '౨', '౩', '౪', '౫', '౬', '౭', '౮', '౯',
+];
+static THAI: [char; 10] = [
+    '๐', '๑', '๒', '๓', '๔', '๕', '๖', '๗', '๘', '๙',
+];
+static TIBETAN: [char; 10] = [
+    '༠', '༡', '༢', '༣', '༤', '༥', '༦', '༧', '༨', '༩',
+];
 
 // Alphabetic styles per CSS-COUNTER-STYLES § 6.2:
 static LOWER_ALPHA: [char; 26] = [
     'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's',
-    't', 'u', 'v', 'w', 'x', 'y', 'z'
+    't', 'u', 'v', 'w', 'x', 'y', 'z',
 ];
 static UPPER_ALPHA: [char; 26] = [
     'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S',
-    'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
+    'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
 ];
 static CJK_EARTHLY_BRANCH: [char; 12] = [
-    '子', '丑', '寅', '卯', '辰', '巳', '午', '未', '申', '酉', '戌', '亥'
+    '子', '丑', '寅', '卯', '辰', '巳', '午', '未', '申', '酉', '戌', '亥',
 ];
 static CJK_HEAVENLY_STEM: [char; 10] = [
-    '甲', '乙', '丙', '丁', '戊', '己', '庚', '辛', '壬', '癸'
+    '甲', '乙', '丙', '丁', '戊', '己', '庚', '辛', '壬', '癸',
 ];
 static LOWER_GREEK: [char; 24] = [
-    'α', 'β', 'γ', 'δ', 'ε', 'ζ', 'η', 'θ', 'ι', 'κ', 'λ', 'μ', 'ν', 'ξ', 'ο', 'π', 'ρ', 'σ', 'τ',
-    'υ', 'φ', 'χ', 'ψ', 'ω'
+    'α', 'β', 'γ', 'δ', 'ε', 'ζ', 'η', 'θ', 'ι', 'κ', 'λ', 'μ', 'ν', 'ξ', 'ο', 'π',
+    'ρ', 'σ', 'τ', 'υ', 'φ', 'χ', 'ψ', 'ω',
 ];
 static HIRAGANA: [char; 48] = [
-    'あ', 'い', 'う', 'え', 'お', 'か', 'き', 'く', 'け', 'こ', 'さ', 'し', 'す', 'せ', 'そ',
-    'た', 'ち', 'つ', 'て', 'と', 'な', 'に', 'ぬ', 'ね', 'の', 'は', 'ひ', 'ふ', 'へ', 'ほ',
-    'ま', 'み', 'む', 'め', 'も', 'や', 'ゆ', 'よ', 'ら', 'り', 'る', 'れ', 'ろ',
-    'わ', 'ゐ', 'ゑ', 'を', 'ん'
+    'あ', 'い', 'う', 'え', 'お', 'か', 'き', 'く', 'け', 'こ', 'さ', 'し', 'す',
+    'せ', 'そ', 'た', 'ち', 'つ', 'て', 'と', 'な', 'に', 'ぬ', 'ね', 'の', 'は',
+    'ひ', 'ふ', 'へ', 'ほ', 'ま', 'み', 'む', 'め', 'も', 'や', 'ゆ', 'よ', 'ら',
+    'り', 'る', 'れ', 'ろ', 'わ', 'ゐ', 'ゑ', 'を', 'ん',
 ];
 static HIRAGANA_IROHA: [char; 47] = [
-    'い', 'ろ', 'は', 'に', 'ほ', 'へ', 'と', 'ち', 'り', 'ぬ', 'る', 'を', 'わ', 'か', 'よ',
-    'た', 'れ', 'そ', 'つ', 'ね', 'な', 'ら', 'む', 'う', 'ゐ', 'の', 'お', 'く', 'や', 'ま',
-    'け', 'ふ', 'こ', 'え', 'て', 'あ', 'さ', 'き', 'ゆ', 'め', 'み', 'し', 'ゑ',
-    'ひ', 'も', 'せ', 'す'
+    'い', 'ろ', 'は', 'に', 'ほ', 'へ', 'と', 'ち', 'り', 'ぬ', 'る', 'を', 'わ',
+    'か', 'よ', 'た', 'れ', 'そ', 'つ', 'ね', 'な', 'ら', 'む', 'う', 'ゐ', 'の',
+    'お', 'く', 'や', 'ま', 'け', 'ふ', 'こ', 'え', 'て', 'あ', 'さ', 'き', 'ゆ',
+    'め', 'み', 'し', 'ゑ', 'ひ', 'も', 'せ', 'す',
 ];
 static KATAKANA: [char; 48] = [
-    'ア', 'イ', 'ウ', 'エ', 'オ', 'カ', 'キ', 'ク', 'ケ', 'コ', 'サ', 'シ', 'ス', 'セ', 'ソ',
-    'タ', 'チ', 'ツ', 'テ', 'ト', 'ナ', 'ニ', 'ヌ', 'ネ', 'ノ', 'ハ', 'ヒ', 'フ', 'ヘ', 'ホ',
-    'マ', 'ミ', 'ム', 'メ', 'モ', 'ヤ', 'ユ', 'ヨ', 'ラ', 'リ', 'ル', 'レ', 'ロ',
-    'ワ', 'ヰ', 'ヱ', 'ヲ', 'ン'
+    'ア', 'イ', 'ウ', 'エ', 'オ', 'カ', 'キ', 'ク', 'ケ', 'コ', 'サ', 'シ', 'ス',
+    'セ', 'ソ', 'タ', 'チ', 'ツ', 'テ', 'ト', 'ナ', 'ニ', 'ヌ', 'ネ', 'ノ', 'ハ',
+    'ヒ', 'フ', 'ヘ', 'ホ', 'マ', 'ミ', 'ム', 'メ', 'モ', 'ヤ', 'ユ', 'ヨ', 'ラ',
+    'リ', 'ル', 'レ', 'ロ', 'ワ', 'ヰ', 'ヱ', 'ヲ', 'ン',
 ];
 static KATAKANA_IROHA: [char; 47] = [
-    'イ', 'ロ', 'ハ', 'ニ', 'ホ', 'ヘ', 'ト', 'チ', 'リ', 'ヌ', 'ル', 'ヲ', 'ワ', 'カ', 'ヨ',
-    'タ', 'レ', 'ソ', 'ツ', 'ネ', 'ナ', 'ラ', 'ム', 'ウ', 'ヰ', 'ノ', 'オ', 'ク', 'ヤ', 'マ',
-    'ケ', 'フ', 'コ', 'エ', 'テ', 'ア', 'サ', 'キ', 'ユ', 'メ', 'ミ', 'シ', 'ヱ',
-    'ヒ', 'モ', 'セ', 'ス'
+    'イ', 'ロ', 'ハ', 'ニ', 'ホ', 'ヘ', 'ト', 'チ', 'リ', 'ヌ', 'ル', 'ヲ', 'ワ',
+    'カ', 'ヨ', 'タ', 'レ', 'ソ', 'ツ', 'ネ', 'ナ', 'ラ', 'ム', 'ウ', 'ヰ', 'ノ',
+    'オ', 'ク', 'ヤ', 'マ', 'ケ', 'フ', 'コ', 'エ', 'テ', 'ア', 'サ', 'キ', 'ユ',
+    'メ', 'ミ', 'シ', 'ヱ', 'ヒ', 'モ', 'セ', 'ス',
 ];
 
 /// The generated content resolution traversal.
@@ -132,8 +162,12 @@ impl<'a> InorderFlowTraversal for ResolveGeneratedContent<'a> {
 
     #[inline]
     fn should_process_subtree(&mut self, flow: &mut Flow) -> bool {
-        flow.base().restyle_damage.intersects(ServoRestyleDamage::RESOLVE_GENERATED_CONTENT) ||
-            flow.base().flags.intersects(FlowFlags::AFFECTS_COUNTERS | FlowFlags::HAS_COUNTER_AFFECTING_CHILDREN)
+        flow.base()
+            .restyle_damage
+            .intersects(ServoRestyleDamage::RESOLVE_GENERATED_CONTENT) ||
+            flow.base().flags.intersects(
+                FlowFlags::AFFECTS_COUNTERS | FlowFlags::HAS_COUNTER_AFFECTING_CHILDREN,
+            )
     }
 }
 
@@ -168,81 +202,97 @@ impl<'a, 'b> ResolveGeneratedContentFragmentMutator<'a, 'b> {
                 if let SpecificFragmentInfo::GeneratedContent(ref mut info) = fragment.specific {
                     info
                 } else {
-                    return
+                    return;
                 };
 
             match **info {
                 GeneratedContentInfo::ListItem => {
-                    new_info = self.traversal.list_item.render(self.traversal.layout_context,
-                                                               fragment.node,
-                                                               fragment.pseudo.clone(),
-                                                               fragment.style.clone(),
-                                                               list_style_type,
-                                                               RenderingMode::Suffix(".\u{00a0}"))
-                }
+                    new_info = self.traversal.list_item.render(
+                        self.traversal.layout_context,
+                        fragment.node,
+                        fragment.pseudo.clone(),
+                        fragment.style.clone(),
+                        list_style_type,
+                        RenderingMode::Suffix(".\u{00a0}"),
+                    )
+                },
                 GeneratedContentInfo::Empty |
                 GeneratedContentInfo::ContentItem(ContentItem::String(_)) => {
                     // Nothing to do here.
-                }
-                GeneratedContentInfo::ContentItem(ContentItem::Counter(ref counter_name,
-                                                                       counter_style)) => {
+                },
+                GeneratedContentInfo::ContentItem(ContentItem::Counter(
+                    ref counter_name,
+                    counter_style,
+                )) => {
                     let temporary_counter = Counter::new();
-                    let counter = self.traversal
+                    let counter = self
+                        .traversal
                         .counters
                         .get(&*counter_name.0)
                         .unwrap_or(&temporary_counter);
-                    new_info = counter.render(self.traversal.layout_context,
-                                              fragment.node,
-                                              fragment.pseudo.clone(),
-                                              fragment.style.clone(),
-                                              counter_style,
-                                              RenderingMode::Plain)
-                }
-                GeneratedContentInfo::ContentItem(ContentItem::Counters(ref counter_name,
-                                                                        ref separator,
-                                                                        counter_style)) => {
+                    new_info = counter.render(
+                        self.traversal.layout_context,
+                        fragment.node,
+                        fragment.pseudo.clone(),
+                        fragment.style.clone(),
+                        counter_style,
+                        RenderingMode::Plain,
+                    )
+                },
+                GeneratedContentInfo::ContentItem(ContentItem::Counters(
+                    ref counter_name,
+                    ref separator,
+                    counter_style,
+                )) => {
                     let temporary_counter = Counter::new();
-                    let counter = self.traversal
+                    let counter = self
+                        .traversal
                         .counters
                         .get(&*counter_name.0)
                         .unwrap_or(&temporary_counter);
-                    new_info = counter.render(self.traversal.layout_context,
-                                              fragment.node,
-                                              fragment.pseudo,
-                                              fragment.style.clone(),
-                                              counter_style,
-                                              RenderingMode::All(&separator));
-                }
+                    new_info = counter.render(
+                        self.traversal.layout_context,
+                        fragment.node,
+                        fragment.pseudo,
+                        fragment.style.clone(),
+                        counter_style,
+                        RenderingMode::All(&separator),
+                    );
+                },
                 GeneratedContentInfo::ContentItem(ContentItem::OpenQuote) => {
-                    new_info = render_text(self.traversal.layout_context,
-                                           fragment.node,
-                                           fragment.pseudo,
-                                           fragment.style.clone(),
-                                           self.quote(&*fragment.style, false));
+                    new_info = render_text(
+                        self.traversal.layout_context,
+                        fragment.node,
+                        fragment.pseudo,
+                        fragment.style.clone(),
+                        self.quote(&*fragment.style, false),
+                    );
                     self.traversal.quote += 1
-                }
+                },
                 GeneratedContentInfo::ContentItem(ContentItem::CloseQuote) => {
                     if self.traversal.quote >= 1 {
                         self.traversal.quote -= 1
                     }
 
-                    new_info = render_text(self.traversal.layout_context,
-                                           fragment.node,
-                                           fragment.pseudo,
-                                           fragment.style.clone(),
-                                           self.quote(&*fragment.style, true));
-                }
+                    new_info = render_text(
+                        self.traversal.layout_context,
+                        fragment.node,
+                        fragment.pseudo,
+                        fragment.style.clone(),
+                        self.quote(&*fragment.style, true),
+                    );
+                },
                 GeneratedContentInfo::ContentItem(ContentItem::NoOpenQuote) => {
                     self.traversal.quote += 1
-                }
+                },
                 GeneratedContentInfo::ContentItem(ContentItem::NoCloseQuote) => {
                     if self.traversal.quote >= 1 {
                         self.traversal.quote -= 1
                     }
-                }
+                },
                 GeneratedContentInfo::ContentItem(ContentItem::Url(..)) => {
                     unreachable!("Servo doesn't parse content: url(..) yet")
-                }
+                },
             }
         };
 
@@ -252,7 +302,7 @@ impl<'a, 'b> ResolveGeneratedContentFragmentMutator<'a, 'b> {
             // so that it isn't processed again on the next layout.  FIXME (mbrubeck): When
             // processing an inline flow, this traversal should be allowed to insert or remove
             // fragments.  Then we can just remove these fragments rather than adding placeholders.
-            None => SpecificFragmentInfo::GeneratedContent(Box::new(GeneratedContentInfo::Empty))
+            None => SpecificFragmentInfo::GeneratedContent(Box::new(GeneratedContentInfo::Empty)),
         };
     }
 
@@ -263,9 +313,12 @@ impl<'a, 'b> ResolveGeneratedContentFragmentMutator<'a, 'b> {
         }
 
         match list_style_type {
-            ListStyleType::Disc | ListStyleType::None | ListStyleType::Circle |
-            ListStyleType::Square | ListStyleType::DisclosureOpen |
-            ListStyleType::DisclosureClosed => {}
+            ListStyleType::Disc |
+            ListStyleType::None |
+            ListStyleType::Circle |
+            ListStyleType::Square |
+            ListStyleType::DisclosureOpen |
+            ListStyleType::DisclosureClosed => {},
             _ => self.traversal.list_item.increment(self.level, 1),
         }
 
@@ -278,25 +331,29 @@ impl<'a, 'b> ResolveGeneratedContentFragmentMutator<'a, 'b> {
         for pair in &*fragment.style().get_counters().counter_reset {
             let counter_name = &*pair.name.0;
             if let Some(ref mut counter) = self.traversal.counters.get_mut(counter_name) {
-                 counter.reset(self.level, pair.value);
-                 continue
+                counter.reset(self.level, pair.value);
+                continue;
             }
 
             let mut counter = Counter::new();
             counter.reset(self.level, pair.value);
-            self.traversal.counters.insert(counter_name.to_owned(), counter);
+            self.traversal
+                .counters
+                .insert(counter_name.to_owned(), counter);
         }
 
         for pair in &*fragment.style().get_counters().counter_increment {
             let counter_name = &*pair.name.0;
             if let Some(ref mut counter) = self.traversal.counters.get_mut(counter_name) {
                 counter.increment(self.level, pair.value);
-                continue
+                continue;
             }
 
             let mut counter = Counter::new();
             counter.increment(self.level, pair.value);
-            self.traversal.counters.insert(counter_name.to_owned(), counter);
+            self.traversal
+                .counters
+                .insert(counter_name.to_owned(), counter);
         }
 
         self.incremented = true
@@ -305,14 +362,14 @@ impl<'a, 'b> ResolveGeneratedContentFragmentMutator<'a, 'b> {
     fn quote(&self, style: &ComputedValues, close: bool) -> String {
         let quotes = &style.get_list().quotes;
         if quotes.0.is_empty() {
-            return String::new()
+            return String::new();
         }
-        let &(ref open_quote, ref close_quote) =
-            if self.traversal.quote as usize >= quotes.0.len() {
-                quotes.0.last().unwrap()
-            } else {
-                &quotes.0[self.traversal.quote as usize]
-            };
+        let &(ref open_quote, ref close_quote) = if self.traversal.quote as usize >= quotes.0.len()
+        {
+            quotes.0.last().unwrap()
+        } else {
+            &quotes.0[self.traversal.quote as usize]
+        };
         if close {
             close_quote.to_string()
         } else {
@@ -329,9 +386,7 @@ struct Counter {
 
 impl Counter {
     fn new() -> Counter {
-        Counter {
-            values: Vec::new(),
-        }
+        Counter { values: Vec::new() }
     }
 
     fn reset(&mut self, level: u32, value: i32) {
@@ -339,7 +394,7 @@ impl Counter {
         if let Some(ref mut existing_value) = self.values.last_mut() {
             if level == existing_value.level {
                 existing_value.value = value;
-                return
+                return;
             }
         }
 
@@ -359,7 +414,7 @@ impl Counter {
     fn increment(&mut self, level: u32, amount: i32) {
         if let Some(ref mut value) = self.values.last_mut() {
             value.value += amount;
-            return
+            return;
         }
 
         self.values.push(CounterValue {
@@ -368,14 +423,15 @@ impl Counter {
         })
     }
 
-    fn render(&self,
-              layout_context: &LayoutContext,
-              node: OpaqueNode,
-              pseudo: PseudoElementType,
-              style: ::ServoArc<ComputedValues>,
-              list_style_type: ListStyleType,
-              mode: RenderingMode)
-              -> Option<SpecificFragmentInfo> {
+    fn render(
+        &self,
+        layout_context: &LayoutContext,
+        node: OpaqueNode,
+        pseudo: PseudoElementType,
+        style: ::ServoArc<ComputedValues>,
+        list_style_type: ListStyleType,
+        mode: RenderingMode,
+    ) -> Option<SpecificFragmentInfo> {
         let mut string = String::new();
         match mode {
             RenderingMode::Plain => {
@@ -384,7 +440,7 @@ impl Counter {
                     None => 0,
                 };
                 push_representation(value, list_style_type, &mut string)
-            }
+            },
             RenderingMode::Suffix(suffix) => {
                 let value = match self.values.last() {
                     Some(ref value) => value.value,
@@ -392,7 +448,7 @@ impl Counter {
                 };
                 push_representation(value, list_style_type, &mut string);
                 string.push_str(suffix)
-            }
+            },
             RenderingMode::All(separator) => {
                 let mut first = true;
                 for value in &self.values {
@@ -402,7 +458,7 @@ impl Counter {
                     first = false;
                     push_representation(value.value, list_style_type, &mut string)
                 }
-            }
+            },
         }
 
         if string.is_empty() {
@@ -432,22 +488,26 @@ struct CounterValue {
 }
 
 /// Creates fragment info for a literal string.
-fn render_text(layout_context: &LayoutContext,
-               node: OpaqueNode,
-               pseudo: PseudoElementType,
-               style: ::ServoArc<ComputedValues>,
-               string: String)
-               -> Option<SpecificFragmentInfo> {
+fn render_text(
+    layout_context: &LayoutContext,
+    node: OpaqueNode,
+    pseudo: PseudoElementType,
+    style: ::ServoArc<ComputedValues>,
+    string: String,
+) -> Option<SpecificFragmentInfo> {
     let mut fragments = LinkedList::new();
-    let info = SpecificFragmentInfo::UnscannedText(
-        Box::new(UnscannedTextFragmentInfo::new(string.into_boxed_str(), None))
-    );
-    fragments.push_back(Fragment::from_opaque_node_and_style(node,
-                                                             pseudo,
-                                                             style.clone(),
-                                                             style,
-                                                             RestyleDamage::rebuild_and_reflow(),
-                                                             info));
+    let info = SpecificFragmentInfo::UnscannedText(Box::new(UnscannedTextFragmentInfo::new(
+        string.into_boxed_str(),
+        None,
+    )));
+    fragments.push_back(Fragment::from_opaque_node_and_style(
+        node,
+        pseudo,
+        style.clone(),
+        style,
+        RestyleDamage::rebuild_and_reflow(),
+        info,
+    ));
     // FIXME(pcwalton): This should properly handle multiple marker fragments. This could happen
     // due to text run splitting.
     let fragments = with_thread_local_font_context(layout_context, |font_context| {
@@ -464,39 +524,28 @@ fn render_text(layout_context: &LayoutContext,
 /// `list-style-type` onto the given string.
 fn push_representation(value: i32, list_style_type: ListStyleType, accumulator: &mut String) {
     match list_style_type {
-        ListStyleType::None => {}
+        ListStyleType::None => {},
         ListStyleType::Disc |
         ListStyleType::Circle |
         ListStyleType::Square |
         ListStyleType::DisclosureOpen |
-        ListStyleType::DisclosureClosed => {
-            accumulator.push(static_representation(list_style_type))
-        }
+        ListStyleType::DisclosureClosed => accumulator.push(static_representation(list_style_type)),
         ListStyleType::Decimal => push_numeric_representation(value, &DECIMAL, accumulator),
         ListStyleType::ArabicIndic => {
             push_numeric_representation(value, &ARABIC_INDIC, accumulator)
-        }
+        },
         ListStyleType::Bengali => push_numeric_representation(value, &BENGALI, accumulator),
-        ListStyleType::Cambodian |
-        ListStyleType::Khmer => {
+        ListStyleType::Cambodian | ListStyleType::Khmer => {
             push_numeric_representation(value, &CAMBODIAN, accumulator)
-        }
-        ListStyleType::CjkDecimal => {
-            push_numeric_representation(value, &CJK_DECIMAL, accumulator)
-        }
-        ListStyleType::Devanagari => {
-            push_numeric_representation(value, &DEVANAGARI, accumulator)
-        }
+        },
+        ListStyleType::CjkDecimal => push_numeric_representation(value, &CJK_DECIMAL, accumulator),
+        ListStyleType::Devanagari => push_numeric_representation(value, &DEVANAGARI, accumulator),
         ListStyleType::Gujarati => push_numeric_representation(value, &GUJARATI, accumulator),
         ListStyleType::Gurmukhi => push_numeric_representation(value, &GURMUKHI, accumulator),
         ListStyleType::Kannada => push_numeric_representation(value, &KANNADA, accumulator),
         ListStyleType::Lao => push_numeric_representation(value, &LAO, accumulator),
-        ListStyleType::Malayalam => {
-            push_numeric_representation(value, &MALAYALAM, accumulator)
-        }
-        ListStyleType::Mongolian => {
-            push_numeric_representation(value, &MONGOLIAN, accumulator)
-        }
+        ListStyleType::Malayalam => push_numeric_representation(value, &MALAYALAM, accumulator),
+        ListStyleType::Mongolian => push_numeric_representation(value, &MONGOLIAN, accumulator),
         ListStyleType::Myanmar => push_numeric_representation(value, &MYANMAR, accumulator),
         ListStyleType::Oriya => push_numeric_representation(value, &ORIYA, accumulator),
         ListStyleType::Persian => push_numeric_representation(value, &PERSIAN, accumulator),
@@ -505,31 +554,27 @@ fn push_representation(value: i32, list_style_type: ListStyleType, accumulator:
         ListStyleType::Tibetan => push_numeric_representation(value, &TIBETAN, accumulator),
         ListStyleType::LowerAlpha => {
             push_alphabetic_representation(value, &LOWER_ALPHA, accumulator)
-        }
+        },
         ListStyleType::UpperAlpha => {
             push_alphabetic_representation(value, &UPPER_ALPHA, accumulator)
-        }
+        },
         ListStyleType::CjkEarthlyBranch => {
             push_alphabetic_representation(value, &CJK_EARTHLY_BRANCH, accumulator)
-        }
+        },
         ListStyleType::CjkHeavenlyStem => {
             push_alphabetic_representation(value, &CJK_HEAVENLY_STEM, accumulator)
-        }
+        },
         ListStyleType::LowerGreek => {
             push_alphabetic_representation(value, &LOWER_GREEK, accumulator)
-        }
-        ListStyleType::Hiragana => {
-            push_alphabetic_representation(value, &HIRAGANA, accumulator)
-        }
+        },
+        ListStyleType::Hiragana => push_alphabetic_representation(value, &HIRAGANA, accumulator),
         ListStyleType::HiraganaIroha => {
             push_alphabetic_representation(value, &HIRAGANA_IROHA, accumulator)
-        }
-        ListStyleType::Katakana => {
-            push_alphabetic_representation(value, &KATAKANA, accumulator)
-        }
+        },
+        ListStyleType::Katakana => push_alphabetic_representation(value, &KATAKANA, accumulator),
         ListStyleType::KatakanaIroha => {
             push_alphabetic_representation(value, &KATAKANA_IROHA, accumulator)
-        }
+        },
     }
 }
 
@@ -572,7 +617,7 @@ fn push_numeric_representation(value: i32, system: &[char], accumulator: &mut St
     // Step 1.
     if abs_value == 0 {
         accumulator.push(system[0]);
-        return
+        return;
     }
 
     // Step 2.

components/layout/incremental.rs

@@ -11,7 +11,7 @@ use style::servo::restyle_damage::ServoRestyleDamage;
 #[derive(Clone, Copy, PartialEq)]
 pub enum RelayoutMode {
     Incremental,
-    Force
+    Force,
 }
 
 bitflags! {
@@ -30,7 +30,10 @@ pub trait LayoutDamageComputation {
 impl<'a> LayoutDamageComputation for &'a mut Flow {
     fn compute_layout_damage(self) -> SpecialRestyleDamage {
         let mut special_damage = SpecialRestyleDamage::empty();
-        let is_absolutely_positioned = self.base().flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED);
+        let is_absolutely_positioned = self
+            .base()
+            .flags
+            .contains(FlowFlags::IS_ABSOLUTELY_POSITIONED);
 
         // In addition to damage, we use this phase to compute whether nodes affect CSS counters.
         let mut has_counter_affecting_children = false;
@@ -41,35 +44,47 @@ impl<'a> LayoutDamageComputation for &'a mut Flow {
             let parent_damage = self_base.restyle_damage;
 
             for kid in self_base.children.iter_mut() {
-                let child_is_absolutely_positioned =
-                    kid.base().flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED);
+                let child_is_absolutely_positioned = kid
+                    .base()
+                    .flags
+                    .contains(FlowFlags::IS_ABSOLUTELY_POSITIONED);
                 kid.mut_base().restyle_damage.insert(
-                    parent_damage.damage_for_child(is_absolutely_positioned,
-                                                   child_is_absolutely_positioned));
+                    parent_damage
+                        .damage_for_child(is_absolutely_positioned, child_is_absolutely_positioned),
+                );
                 {
                     let kid: &mut Flow = kid;
                     special_damage.insert(kid.compute_layout_damage());
                 }
-                self_base.restyle_damage
-                         .insert(kid.base().restyle_damage.damage_for_parent(
-                                 child_is_absolutely_positioned));
+                self_base.restyle_damage.insert(
+                    kid.base()
+                        .restyle_damage
+                        .damage_for_parent(child_is_absolutely_positioned),
+                );
 
-                has_counter_affecting_children = has_counter_affecting_children ||
-                    kid.base().flags.intersects(FlowFlags::AFFECTS_COUNTERS |
-                                                     FlowFlags::HAS_COUNTER_AFFECTING_CHILDREN);
+                has_counter_affecting_children =
+                    has_counter_affecting_children || kid.base().flags.intersects(
+                        FlowFlags::AFFECTS_COUNTERS | FlowFlags::HAS_COUNTER_AFFECTING_CHILDREN,
+                    );
             }
         }
 
         let self_base = self.mut_base();
-        if self_base.flags.float_kind() != Float::None &&
-                self_base.restyle_damage.intersects(ServoRestyleDamage::REFLOW) {
+        if self_base.flags.float_kind() != Float::None && self_base
+            .restyle_damage
+            .intersects(ServoRestyleDamage::REFLOW)
+        {
             special_damage.insert(SpecialRestyleDamage::REFLOW_ENTIRE_DOCUMENT);
         }
 
         if has_counter_affecting_children {
-            self_base.flags.insert(FlowFlags::HAS_COUNTER_AFFECTING_CHILDREN)
+            self_base
+                .flags
+                .insert(FlowFlags::HAS_COUNTER_AFFECTING_CHILDREN)
         } else {
-            self_base.flags.remove(FlowFlags::HAS_COUNTER_AFFECTING_CHILDREN)
+            self_base
+                .flags
+                .remove(FlowFlags::HAS_COUNTER_AFFECTING_CHILDREN)
         }
 
         special_damage
@@ -77,8 +92,12 @@ impl<'a> LayoutDamageComputation for &'a mut Flow {
 
     fn reflow_entire_document(self) {
         let self_base = self.mut_base();
-        self_base.restyle_damage.insert(RestyleDamage::rebuild_and_reflow());
-        self_base.restyle_damage.remove(ServoRestyleDamage::RECONSTRUCT_FLOW);
+        self_base
+            .restyle_damage
+            .insert(RestyleDamage::rebuild_and_reflow());
+        self_base
+            .restyle_damage
+            .remove(ServoRestyleDamage::RECONSTRUCT_FLOW);
         for kid in self_base.children.iter_mut() {
             kid.reflow_entire_document();
         }

components/layout/layout_debug.rs

@@ -47,7 +47,7 @@ impl ScopeData {
             name: name,
             pre: pre,
             post: Value::Null,
-            children: vec!(),
+            children: vec![],
         }
     }
 }

components/layout/lib.rs

@@ -14,7 +14,8 @@ extern crate fnv;
 extern crate fxhash;
 extern crate gfx;
 extern crate gfx_traits;
-#[macro_use] extern crate html5ever;
+#[macro_use]
+extern crate html5ever;
 extern crate ipc_channel;
 extern crate libc;
 #[macro_use]
@@ -30,7 +31,8 @@ extern crate range;
 extern crate rayon;
 extern crate script_layout_interface;
 extern crate script_traits;
-#[macro_use] extern crate serde;
+#[macro_use]
+extern crate serde;
 extern crate serde_json;
 extern crate servo_arc;
 extern crate servo_atoms;

components/layout/list_item.rs

@@ -40,10 +40,11 @@ pub struct ListItemFlow {
 }
 
 impl ListItemFlow {
-    pub fn from_fragments_and_flotation(main_fragment: Fragment,
-                                        marker_fragments: Vec<Fragment>,
-                                        flotation: Option<FloatKind>)
-                                        -> ListItemFlow {
+    pub fn from_fragments_and_flotation(
+        main_fragment: Fragment,
+        marker_fragments: Vec<Fragment>,
+        flotation: Option<FloatKind>,
+    ) -> ListItemFlow {
         let mut this = ListItemFlow {
             block_flow: BlockFlow::from_fragment_and_float_kind(main_fragment, flotation),
             marker_fragments: marker_fragments,
@@ -56,8 +57,12 @@ impl ListItemFlow {
                 ListStyleType::Circle |
                 ListStyleType::Square |
                 ListStyleType::DisclosureOpen |
-                ListStyleType::DisclosureClosed => {}
-                _ => this.block_flow.base.restyle_damage.insert(ServoRestyleDamage::RESOLVE_GENERATED_CONTENT),
+                ListStyleType::DisclosureClosed => {},
+                _ => this
+                    .block_flow
+                    .base
+                    .restyle_damage
+                    .insert(ServoRestyleDamage::RESOLVE_GENERATED_CONTENT),
             }
         }
 
@@ -77,20 +82,29 @@ impl ListItemFlow {
         let available_rect = base.floats.available_rect(
             -base.position.size.block,
             base.position.size.block,
-            base.block_container_inline_size);
-        let mut marker_inline_start = available_rect.unwrap_or(self.block_flow.fragment.border_box).start.i;
+            base.block_container_inline_size,
+        );
+        let mut marker_inline_start = available_rect
+            .unwrap_or(self.block_flow.fragment.border_box)
+            .start
+            .i;
 
         for marker in self.marker_fragments.iter_mut().rev() {
-            let container_block_size =
-                self.block_flow.explicit_block_containing_size(layout_context.shared_context());
-            marker.assign_replaced_inline_size_if_necessary(base.block_container_inline_size, container_block_size);
+            let container_block_size = self
+                .block_flow
+                .explicit_block_containing_size(layout_context.shared_context());
+            marker.assign_replaced_inline_size_if_necessary(
+                base.block_container_inline_size,
+                container_block_size,
+            );
 
             // Do this now. There's no need to do this in bubble-widths, since markers do not
             // contribute to the inline size of this flow.
             let intrinsic_inline_sizes = marker.compute_intrinsic_inline_sizes();
 
-            marker.border_box.size.inline =
-                intrinsic_inline_sizes.content_intrinsic_sizes.preferred_inline_size;
+            marker.border_box.size.inline = intrinsic_inline_sizes
+                .content_intrinsic_sizes
+                .preferred_inline_size;
             marker_inline_start = marker_inline_start - marker.border_box.size.inline;
             marker.border_box.start.i = marker_inline_start;
         }
@@ -99,18 +113,22 @@ impl ListItemFlow {
     fn assign_marker_block_sizes(&mut self, layout_context: &LayoutContext) {
         // FIXME(pcwalton): Do this during flow construction, like `InlineFlow` does?
         let marker_line_metrics = with_thread_local_font_context(layout_context, |font_context| {
-            InlineFlow::minimum_line_metrics_for_fragments(&self.marker_fragments,
-                                                           font_context,
-                                                           &*self.block_flow.fragment.style)
+            InlineFlow::minimum_line_metrics_for_fragments(
+                &self.marker_fragments,
+                font_context,
+                &*self.block_flow.fragment.style,
+            )
         });
 
         for marker in &mut self.marker_fragments {
             marker.assign_replaced_block_size_if_necessary();
-            let marker_inline_metrics = marker.aligned_inline_metrics(layout_context,
-                                                                      &marker_line_metrics,
-                                                                      Some(&marker_line_metrics));
-            marker.border_box.start.b = marker_line_metrics.space_above_baseline -
-                marker_inline_metrics.ascent;
+            let marker_inline_metrics = marker.aligned_inline_metrics(
+                layout_context,
+                &marker_line_metrics,
+                Some(&marker_line_metrics),
+            );
+            marker.border_box.start.b =
+                marker_line_metrics.space_above_baseline - marker_inline_metrics.ascent;
         }
     }
 }
@@ -144,7 +162,8 @@ impl Flow for ListItemFlow {
     }
 
     fn compute_stacking_relative_position(&mut self, layout_context: &LayoutContext) {
-        self.block_flow.compute_stacking_relative_position(layout_context)
+        self.block_flow
+            .compute_stacking_relative_position(layout_context)
     }
 
     fn place_float_if_applicable<'a>(&mut self) {
@@ -160,11 +179,13 @@ impl Flow for ListItemFlow {
     }
 
     fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
-        self.block_flow.update_late_computed_inline_position_if_necessary(inline_position)
+        self.block_flow
+            .update_late_computed_inline_position_if_necessary(inline_position)
     }
 
     fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
-        self.block_flow.update_late_computed_block_position_if_necessary(block_position)
+        self.block_flow
+            .update_late_computed_block_position_if_necessary(block_position)
     }
 
     fn build_display_list(&mut self, state: &mut DisplayListBuildState) {
@@ -181,9 +202,17 @@ impl Flow for ListItemFlow {
 
     fn compute_overflow(&self) -> Overflow {
         let mut overflow = self.block_flow.compute_overflow();
-        let flow_size = self.block_flow.base.position.size.to_physical(self.block_flow.base.writing_mode);
-        let relative_containing_block_size =
-            &self.block_flow.base.early_absolute_position_info.relative_containing_block_size;
+        let flow_size = self
+            .block_flow
+            .base
+            .position
+            .size
+            .to_physical(self.block_flow.base.writing_mode);
+        let relative_containing_block_size = &self
+            .block_flow
+            .base
+            .early_absolute_position_info
+            .relative_containing_block_size;
 
         for fragment in &self.marker_fragments {
             overflow.union(&fragment.compute_overflow(&flow_size, &relative_containing_block_size))
@@ -200,32 +229,38 @@ impl Flow for ListItemFlow {
         self.block_flow.positioning()
     }
 
-    fn iterate_through_fragment_border_boxes(&self,
-                                             iterator: &mut FragmentBorderBoxIterator,
-                                             level: i32,
-                                             stacking_context_position: &Point2D<Au>) {
-        self.block_flow.iterate_through_fragment_border_boxes(iterator,
-                                                              level,
-                                                              stacking_context_position);
+    fn iterate_through_fragment_border_boxes(
+        &self,
+        iterator: &mut FragmentBorderBoxIterator,
+        level: i32,
+        stacking_context_position: &Point2D<Au>,
+    ) {
+        self.block_flow.iterate_through_fragment_border_boxes(
+            iterator,
+            level,
+            stacking_context_position,
+        );
 
         for marker in &self.marker_fragments {
             if iterator.should_process(marker) {
                 iterator.process(
                     marker,
                     level,
-                    &marker.stacking_relative_border_box(&self.block_flow
-                                                              .base
-                                                              .stacking_relative_position,
-                                                         &self.block_flow
-                                                              .base
-                                                              .early_absolute_position_info
-                                                              .relative_containing_block_size,
-                                                         self.block_flow
-                                                             .base
-                                                             .early_absolute_position_info
-                                                             .relative_containing_block_mode,
-                                                         CoordinateSystem::Own)
-                           .translate(&stacking_context_position.to_vector()));
+                    &marker
+                        .stacking_relative_border_box(
+                            &self.block_flow.base.stacking_relative_position,
+                            &self
+                                .block_flow
+                                .base
+                                .early_absolute_position_info
+                                .relative_containing_block_size,
+                            self.block_flow
+                                .base
+                                .early_absolute_position_info
+                                .relative_containing_block_mode,
+                            CoordinateSystem::Own,
+                        ).translate(&stacking_context_position.to_vector()),
+                );
             }
         }
     }
@@ -260,7 +295,7 @@ impl ListStyleTypeContent {
             ListStyleType::DisclosureClosed => {
                 let text = generated_content::static_representation(list_style_type);
                 ListStyleTypeContent::StaticText(text)
-            }
+            },
             _ => ListStyleTypeContent::GeneratedContent(Box::new(GeneratedContentInfo::ListItem)),
         }
     }

components/layout/model.rs

@@ -126,21 +126,22 @@ impl MarginCollapseInfo {
         }
     }
 
-    pub fn finish_and_compute_collapsible_margins(mut self,
-                                                  fragment: &Fragment,
-                                                  containing_block_size: Option<Au>,
-                                                  can_collapse_block_end_margin_with_kids: bool,
-                                                  mut may_collapse_through: bool)
-                                                  -> (CollapsibleMargins, Au) {
+    pub fn finish_and_compute_collapsible_margins(
+        mut self,
+        fragment: &Fragment,
+        containing_block_size: Option<Au>,
+        can_collapse_block_end_margin_with_kids: bool,
+        mut may_collapse_through: bool,
+    ) -> (CollapsibleMargins, Au) {
         let state = match self.state {
             MarginCollapseState::AccumulatingCollapsibleTopMargin => {
-                may_collapse_through = may_collapse_through &&
-                    match fragment.style().content_block_size() {
+                may_collapse_through =
+                    may_collapse_through && match fragment.style().content_block_size() {
                         LengthOrPercentageOrAuto::Auto => true,
                         LengthOrPercentageOrAuto::Length(l) => l.px() == 0.,
                         LengthOrPercentageOrAuto::Percentage(v) => {
                             v.0 == 0. || containing_block_size.is_none()
-                        }
+                        },
                         LengthOrPercentageOrAuto::Calc(_) => false,
                     };
 
@@ -156,14 +157,14 @@ impl MarginCollapseInfo {
                             // If the fragment has non-zero min-block-size, margins may not
                             // collapse through it.
                             FinalMarginState::BottomMarginCollapses
-                        }
+                        },
                     }
                 } else {
                     // If the fragment has an explicitly specified block-size, margins may not
                     // collapse through it.
                     FinalMarginState::BottomMarginCollapses
                 }
-            }
+            },
             MarginCollapseState::AccumulatingMarginIn => FinalMarginState::BottomMarginCollapses,
         };
 
@@ -174,27 +175,41 @@ impl MarginCollapseInfo {
             match state {
                 FinalMarginState::MarginsCollapseThrough => {
                     let advance = self.block_start_margin.collapse();
-                    self.margin_in.union(AdjoiningMargins::from_margin(block_end_margin));
-                    (CollapsibleMargins::Collapse(self.block_start_margin, self.margin_in),
-                                                  advance)
-                }
+                    self.margin_in
+                        .union(AdjoiningMargins::from_margin(block_end_margin));
+                    (
+                        CollapsibleMargins::Collapse(self.block_start_margin, self.margin_in),
+                        advance,
+                    )
+                },
                 FinalMarginState::BottomMarginCollapses => {
                     let advance = self.margin_in.collapse();
-                    self.margin_in.union(AdjoiningMargins::from_margin(block_end_margin));
-                    (CollapsibleMargins::Collapse(self.block_start_margin, self.margin_in),
-                                                  advance)
-                }
+                    self.margin_in
+                        .union(AdjoiningMargins::from_margin(block_end_margin));
+                    (
+                        CollapsibleMargins::Collapse(self.block_start_margin, self.margin_in),
+                        advance,
+                    )
+                },
             }
         } else {
             match state {
                 FinalMarginState::MarginsCollapseThrough => {
-                    self.block_start_margin.union(AdjoiningMargins::from_margin(block_end_margin));
-                    (CollapsibleMargins::CollapseThrough(self.block_start_margin), Au(0))
-                }
+                    self.block_start_margin
+                        .union(AdjoiningMargins::from_margin(block_end_margin));
+                    (
+                        CollapsibleMargins::CollapseThrough(self.block_start_margin),
+                        Au(0),
+                    )
+                },
                 FinalMarginState::BottomMarginCollapses => {
-                    self.margin_in.union(AdjoiningMargins::from_margin(block_end_margin));
-                    (CollapsibleMargins::Collapse(self.block_start_margin, self.margin_in), Au(0))
-                }
+                    self.margin_in
+                        .union(AdjoiningMargins::from_margin(block_end_margin));
+                    (
+                        CollapsibleMargins::Collapse(self.block_start_margin, self.margin_in),
+                        Au(0),
+                    )
+                },
             }
         }
     }
@@ -206,7 +221,7 @@ impl MarginCollapseInfo {
                 // needs to be positioned relative to our *border box*, not our margin box. See
                 // `tests/ref/float_under_top_margin_a.html`.
                 Au(0)
-            }
+            },
             MarginCollapseState::AccumulatingMarginIn => self.margin_in.collapse(),
         }
     }
@@ -214,78 +229,99 @@ impl MarginCollapseInfo {
     /// Adds the child's potentially collapsible block-start margin to the current margin state and
     /// advances the Y offset by the appropriate amount to handle that margin. Returns the amount
     /// that should be added to the Y offset during block layout.
-    pub fn advance_block_start_margin(&mut self,
-                                      child_collapsible_margins: &CollapsibleMargins,
-                                      can_collapse_block_start_margin: bool)
-                                      -> Au {
+    pub fn advance_block_start_margin(
+        &mut self,
+        child_collapsible_margins: &CollapsibleMargins,
+        can_collapse_block_start_margin: bool,
+    ) -> Au {
         if !can_collapse_block_start_margin {
             self.state = MarginCollapseState::AccumulatingMarginIn
         }
 
         match (self.state, *child_collapsible_margins) {
-            (MarginCollapseState::AccumulatingCollapsibleTopMargin,
-             CollapsibleMargins::None(block_start, _)) => {
+            (
+                MarginCollapseState::AccumulatingCollapsibleTopMargin,
+                CollapsibleMargins::None(block_start, _),
+            ) => {
                 self.state = MarginCollapseState::AccumulatingMarginIn;
                 block_start
-            }
-            (MarginCollapseState::AccumulatingCollapsibleTopMargin,
-             CollapsibleMargins::Collapse(block_start, _)) => {
+            },
+            (
+                MarginCollapseState::AccumulatingCollapsibleTopMargin,
+                CollapsibleMargins::Collapse(block_start, _),
+            ) => {
                 self.block_start_margin.union(block_start);
                 self.state = MarginCollapseState::AccumulatingMarginIn;
                 Au(0)
-            }
-            (MarginCollapseState::AccumulatingMarginIn,
-             CollapsibleMargins::None(block_start, _)) => {
+            },
+            (
+                MarginCollapseState::AccumulatingMarginIn,
+                CollapsibleMargins::None(block_start, _),
+            ) => {
                 let previous_margin_value = self.margin_in.collapse();
                 self.margin_in = AdjoiningMargins::new();
                 previous_margin_value + block_start
-            }
-            (MarginCollapseState::AccumulatingMarginIn,
-             CollapsibleMargins::Collapse(block_start, _)) => {
+            },
+            (
+                MarginCollapseState::AccumulatingMarginIn,
+                CollapsibleMargins::Collapse(block_start, _),
+            ) => {
                 self.margin_in.union(block_start);
                 let margin_value = self.margin_in.collapse();
                 self.margin_in = AdjoiningMargins::new();
                 margin_value
-            }
+            },
             (_, CollapsibleMargins::CollapseThrough(_)) => {
                 // For now, we ignore this; this will be handled by `advance_block_end_margin`
                 // below.
                 Au(0)
-            }
+            },
         }
     }
 
     /// Adds the child's potentially collapsible block-end margin to the current margin state and
     /// advances the Y offset by the appropriate amount to handle that margin. Returns the amount
     /// that should be added to the Y offset during block layout.
-    pub fn advance_block_end_margin(&mut self, child_collapsible_margins: &CollapsibleMargins)
-                                    -> Au {
+    pub fn advance_block_end_margin(
+        &mut self,
+        child_collapsible_margins: &CollapsibleMargins,
+    ) -> Au {
         match (self.state, *child_collapsible_margins) {
-            (MarginCollapseState::AccumulatingCollapsibleTopMargin, CollapsibleMargins::None(..)) |
-            (MarginCollapseState::AccumulatingCollapsibleTopMargin,
-             CollapsibleMargins::Collapse(..)) => {
+            (
+                MarginCollapseState::AccumulatingCollapsibleTopMargin,
+                CollapsibleMargins::None(..),
+            ) |
+            (
+                MarginCollapseState::AccumulatingCollapsibleTopMargin,
+                CollapsibleMargins::Collapse(..),
+            ) => {
                 // Can't happen because the state will have been replaced with
                 // `MarginCollapseState::AccumulatingMarginIn` above.
                 panic!("should not be accumulating collapsible block_start margins anymore!")
-            }
-            (MarginCollapseState::AccumulatingCollapsibleTopMargin,
-             CollapsibleMargins::CollapseThrough(margin)) => {
+            },
+            (
+                MarginCollapseState::AccumulatingCollapsibleTopMargin,
+                CollapsibleMargins::CollapseThrough(margin),
+            ) => {
                 self.block_start_margin.union(margin);
                 Au(0)
-            }
-            (MarginCollapseState::AccumulatingMarginIn,
-             CollapsibleMargins::None(_, block_end)) => {
+            },
+            (MarginCollapseState::AccumulatingMarginIn, CollapsibleMargins::None(_, block_end)) => {
                 assert_eq!(self.margin_in.most_positive, Au(0));
                 assert_eq!(self.margin_in.most_negative, Au(0));
                 block_end
-            }
-            (MarginCollapseState::AccumulatingMarginIn,
-             CollapsibleMargins::Collapse(_, block_end)) |
-            (MarginCollapseState::AccumulatingMarginIn,
-             CollapsibleMargins::CollapseThrough(block_end)) => {
+            },
+            (
+                MarginCollapseState::AccumulatingMarginIn,
+                CollapsibleMargins::Collapse(_, block_end),
+            ) |
+            (
+                MarginCollapseState::AccumulatingMarginIn,
+                CollapsibleMargins::CollapseThrough(block_end),
+            ) => {
                 self.margin_in.union(block_end);
                 Au(0)
-            }
+            },
         }
     }
 }
@@ -309,7 +345,11 @@ pub struct IntrinsicISizes {
 
 impl fmt::Debug for IntrinsicISizes {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "min={:?}, pref={:?}", self.minimum_inline_size, self.preferred_inline_size)
+        write!(
+            f,
+            "min={:?}, pref={:?}",
+            self.minimum_inline_size, self.preferred_inline_size
+        )
     }
 }
 
@@ -345,9 +385,9 @@ impl IntrinsicISizesContribution {
     pub fn finish(self) -> IntrinsicISizes {
         IntrinsicISizes {
             minimum_inline_size: self.content_intrinsic_sizes.minimum_inline_size +
-                                     self.surrounding_size,
+                self.surrounding_size,
             preferred_inline_size: self.content_intrinsic_sizes.preferred_inline_size +
-                                     self.surrounding_size,
+                self.surrounding_size,
         }
     }
 
@@ -358,8 +398,10 @@ impl IntrinsicISizesContribution {
     /// FIXME(pcwalton): This is incorrect when the inline fragment contains forced line breaks
     /// (e.g. `<br>` or `white-space: pre`).
     pub fn union_inline(&mut self, sizes: &IntrinsicISizes) {
-        self.content_intrinsic_sizes.minimum_inline_size =
-            max(self.content_intrinsic_sizes.minimum_inline_size, sizes.minimum_inline_size);
+        self.content_intrinsic_sizes.minimum_inline_size = max(
+            self.content_intrinsic_sizes.minimum_inline_size,
+            sizes.minimum_inline_size,
+        );
         self.content_intrinsic_sizes.preferred_inline_size =
             self.content_intrinsic_sizes.preferred_inline_size + sizes.preferred_inline_size
     }
@@ -382,10 +424,14 @@ impl IntrinsicISizesContribution {
     ///
     /// This is used when contributing the intrinsic sizes for individual fragments.
     pub fn union_block(&mut self, sizes: &IntrinsicISizes) {
-        self.content_intrinsic_sizes.minimum_inline_size =
-            max(self.content_intrinsic_sizes.minimum_inline_size, sizes.minimum_inline_size);
-        self.content_intrinsic_sizes.preferred_inline_size =
-            max(self.content_intrinsic_sizes.preferred_inline_size, sizes.preferred_inline_size)
+        self.content_intrinsic_sizes.minimum_inline_size = max(
+            self.content_intrinsic_sizes.minimum_inline_size,
+            sizes.minimum_inline_size,
+        );
+        self.content_intrinsic_sizes.preferred_inline_size = max(
+            self.content_intrinsic_sizes.preferred_inline_size,
+            sizes.preferred_inline_size,
+        )
     }
 }
 
@@ -398,17 +444,16 @@ pub enum MaybeAuto {
 
 impl MaybeAuto {
     #[inline]
-    pub fn from_style(length: LengthOrPercentageOrAuto, containing_length: Au)
-                      -> MaybeAuto {
+    pub fn from_style(length: LengthOrPercentageOrAuto, containing_length: Au) -> MaybeAuto {
         match length {
             LengthOrPercentageOrAuto::Auto => MaybeAuto::Auto,
             LengthOrPercentageOrAuto::Percentage(percent) => {
                 MaybeAuto::Specified(containing_length.scale_by(percent.0))
-            }
+            },
             LengthOrPercentageOrAuto::Calc(calc) => {
                 MaybeAuto::from_option(calc.to_used_value(Some(containing_length)))
-            }
-            LengthOrPercentageOrAuto::Length(length) => MaybeAuto::Specified(Au::from(length))
+            },
+            LengthOrPercentageOrAuto::Length(length) => MaybeAuto::Specified(Au::from(length)),
         }
     }
 
@@ -442,7 +487,10 @@ impl MaybeAuto {
     }
 
     #[inline]
-    pub fn map<F>(&self, mapper: F) -> MaybeAuto where F: FnOnce(Au) -> Au {
+    pub fn map<F>(&self, mapper: F) -> MaybeAuto
+    where
+        F: FnOnce(Au) -> Au,
+    {
         match *self {
             MaybeAuto::Auto => MaybeAuto::Auto,
             MaybeAuto::Specified(value) => MaybeAuto::Specified(mapper(value)),
@@ -453,15 +501,17 @@ impl MaybeAuto {
 /// Receive an optional container size and return used value for width or height.
 ///
 /// `style_length`: content size as given in the CSS.
-pub fn style_length(style_length: LengthOrPercentageOrAuto,
-                    container_size: Option<Au>) -> MaybeAuto {
+pub fn style_length(
+    style_length: LengthOrPercentageOrAuto,
+    container_size: Option<Au>,
+) -> MaybeAuto {
     match container_size {
         Some(length) => MaybeAuto::from_style(style_length, length),
         None => if let LengthOrPercentageOrAuto::Length(length) = style_length {
             MaybeAuto::Specified(Au::from(length))
         } else {
             MaybeAuto::Auto
-        }
+        },
     }
 }
 
@@ -475,25 +525,37 @@ pub fn style_length(style_length: LengthOrPercentageOrAuto,
 /// [1]: https://drafts.csswg.org/css-backgrounds-3/#border-radius
 pub fn specified_border_radius(
     radius: BorderCornerRadius,
-    containing_size: Size2D<Au>)
-    -> Size2D<Au>
-{
+    containing_size: Size2D<Au>,
+) -> Size2D<Au> {
     let w = radius.0.width().to_used_value(containing_size.width);
     let h = radius.0.height().to_used_value(containing_size.height);
     Size2D::new(w, h)
 }
 
 #[inline]
-pub fn padding_from_style(style: &ComputedValues,
-                          containing_block_inline_size: Au,
-                          writing_mode: WritingMode)
-                          -> LogicalMargin<Au> {
+pub fn padding_from_style(
+    style: &ComputedValues,
+    containing_block_inline_size: Au,
+    writing_mode: WritingMode,
+) -> LogicalMargin<Au> {
     let padding_style = style.get_padding();
-    LogicalMargin::from_physical(writing_mode, SideOffsets2D::new(
-        padding_style.padding_top.to_used_value(containing_block_inline_size),
-        padding_style.padding_right.to_used_value(containing_block_inline_size),
-        padding_style.padding_bottom.to_used_value(containing_block_inline_size),
-        padding_style.padding_left.to_used_value(containing_block_inline_size)))
+    LogicalMargin::from_physical(
+        writing_mode,
+        SideOffsets2D::new(
+            padding_style
+                .padding_top
+                .to_used_value(containing_block_inline_size),
+            padding_style
+                .padding_right
+                .to_used_value(containing_block_inline_size),
+            padding_style
+                .padding_bottom
+                .to_used_value(containing_block_inline_size),
+            padding_style
+                .padding_left
+                .to_used_value(containing_block_inline_size),
+        ),
+    )
 }
 
 /// Returns the explicitly-specified margin lengths from the given style. Percentage and auto
@@ -501,14 +563,20 @@ pub fn padding_from_style(style: &ComputedValues,
 ///
 /// This is used when calculating intrinsic inline sizes.
 #[inline]
-pub fn specified_margin_from_style(style: &ComputedValues,
-                                   writing_mode: WritingMode) -> LogicalMargin<Au> {
+pub fn specified_margin_from_style(
+    style: &ComputedValues,
+    writing_mode: WritingMode,
+) -> LogicalMargin<Au> {
     let margin_style = style.get_margin();
-    LogicalMargin::from_physical(writing_mode, SideOffsets2D::new(
-        MaybeAuto::from_style(margin_style.margin_top, Au(0)).specified_or_zero(),
-        MaybeAuto::from_style(margin_style.margin_right, Au(0)).specified_or_zero(),
-        MaybeAuto::from_style(margin_style.margin_bottom, Au(0)).specified_or_zero(),
-        MaybeAuto::from_style(margin_style.margin_left, Au(0)).specified_or_zero()))
+    LogicalMargin::from_physical(
+        writing_mode,
+        SideOffsets2D::new(
+            MaybeAuto::from_style(margin_style.margin_top, Au(0)).specified_or_zero(),
+            MaybeAuto::from_style(margin_style.margin_right, Au(0)).specified_or_zero(),
+            MaybeAuto::from_style(margin_style.margin_bottom, Au(0)).specified_or_zero(),
+            MaybeAuto::from_style(margin_style.margin_left, Au(0)).specified_or_zero(),
+        ),
+    )
 }
 
 /// A min-size and max-size constraint. The constructor has a optional `border`
@@ -523,17 +591,19 @@ pub struct SizeConstraint {
 
 impl SizeConstraint {
     /// Create a `SizeConstraint` for an axis.
-    pub fn new(container_size: Option<Au>,
-               min_size: LengthOrPercentage,
-               max_size: LengthOrPercentageOrNone,
-               border: Option<Au>) -> SizeConstraint {
+    pub fn new(
+        container_size: Option<Au>,
+        min_size: LengthOrPercentage,
+        max_size: LengthOrPercentageOrNone,
+        border: Option<Au>,
+    ) -> SizeConstraint {
         let mut min_size = match container_size {
             Some(container_size) => min_size.to_used_value(container_size),
             None => if let LengthOrPercentage::Length(length) = min_size {
                 Au::from(length)
             } else {
                 Au(0)
-            }
+            },
         };
 
         let mut max_size = match container_size {
@@ -542,7 +612,7 @@ impl SizeConstraint {
                 Some(Au::from(length))
             } else {
                 None
-            }
+            },
         };
         // Make sure max size is not smaller than min size.
         max_size = max_size.map(|x| max(x, min_size));
@@ -554,7 +624,7 @@ impl SizeConstraint {
 
         SizeConstraint {
             min_size: min_size,
-            max_size: max_size
+            max_size: max_size,
         }
     }
 
@@ -565,7 +635,7 @@ impl SizeConstraint {
         } else {
             match self.max_size {
                 Some(max_size) if max_size < other => max_size,
-                _ => other
+                _ => other,
             }
         }
     }

components/layout/multicol.rs

@@ -85,7 +85,10 @@ impl Flow for MulticolFlow {
     }
 
     fn assign_inline_sizes(&mut self, layout_context: &LayoutContext) {
-        debug!("assign_inline_sizes({}): assigning inline_size for flow", "multicol");
+        debug!(
+            "assign_inline_sizes({}): assigning inline_size for flow",
+            "multicol"
+        );
         let shared_context = layout_context.shared_context();
         self.block_flow.compute_inline_sizes(shared_context);
 
@@ -94,8 +97,7 @@ impl Flow for MulticolFlow {
             self.block_flow.fragment.border_padding.inline_start;
 
         // Distance from the inline-end margin edge to the inline-end content edge.
-        let inline_end_content_edge =
-            self.block_flow.fragment.margin.inline_end +
+        let inline_end_content_edge = self.block_flow.fragment.margin.inline_end +
             self.block_flow.fragment.border_padding.inline_end;
 
         self.block_flow.assign_inline_sizes(layout_context);
@@ -107,15 +109,19 @@ impl Flow for MulticolFlow {
             let style = &self.block_flow.fragment.style;
             let column_gap = match style.get_position().column_gap {
                 Either::First(len) => len.0.to_pixel_length(content_inline_size).into(),
-                Either::Second(_normal) => self.block_flow.fragment.style.get_font().font_size.size(),
+                Either::Second(_normal) => {
+                    self.block_flow.fragment.style.get_font().font_size.size()
+                },
             };
 
             let column_style = style.get_column();
             let mut column_count;
             if let Either::First(column_width) = column_style.column_width {
                 let column_width = Au::from(column_width);
-                column_count =
-                    max(1, (content_inline_size + column_gap).0 / (column_width + column_gap).0);
+                column_count = max(
+                    1,
+                    (content_inline_size + column_gap).0 / (column_width + column_gap).0,
+                );
                 if let ColumnCount::Integer(specified_column_count) = column_style.column_count {
                     column_count = min(column_count, specified_column_count.0 as i32);
                 }
@@ -125,16 +131,22 @@ impl Flow for MulticolFlow {
                     _ => unreachable!(),
                 }
             }
-            column_width =
-                max(Au(0), (content_inline_size + column_gap) / column_count - column_gap);
+            column_width = max(
+                Au(0),
+                (content_inline_size + column_gap) / column_count - column_gap,
+            );
             self.column_pitch = column_width + column_gap;
         }
 
         self.block_flow.fragment.border_box.size.inline = content_inline_size + padding_and_borders;
 
         self.block_flow.propagate_assigned_inline_size_to_children(
-            shared_context, inline_start_content_edge, inline_end_content_edge, column_width,
-            |_, _, _, _, _, _| {});
+            shared_context,
+            inline_start_content_edge,
+            inline_end_content_edge,
+            column_width,
+            |_, _, _, _, _, _| {},
+        );
     }
 
     fn assign_block_size(&mut self, ctx: &LayoutContext) {
@@ -156,7 +168,7 @@ impl Flow for MulticolFlow {
                         ctx.shared_context().viewport_size(),
                     ).block
                 }
-            }
+            },
         });
 
         // Before layout, everything is in a single "column"
@@ -167,17 +179,20 @@ impl Flow for MulticolFlow {
         self.block_flow.assign_block_size(ctx);
 
         loop {
-            let remaining = Arc::get_mut(&mut column).unwrap().fragment(ctx, fragmentation_context);
+            let remaining = Arc::get_mut(&mut column)
+                .unwrap()
+                .fragment(ctx, fragmentation_context);
             self.block_flow.base.children.push_back_arc(column);
             column = match remaining {
                 Some(remaining) => remaining,
-                None => break
+                None => break,
             };
         }
     }
 
     fn compute_stacking_relative_position(&mut self, layout_context: &LayoutContext) {
-        self.block_flow.compute_stacking_relative_position(layout_context);
+        self.block_flow
+            .compute_stacking_relative_position(layout_context);
         let pitch = LogicalSize::new(self.block_flow.base.writing_mode, self.column_pitch, Au(0));
         let pitch = pitch.to_physical(self.block_flow.base.writing_mode);
         for (i, child) in self.block_flow.base.children.iter_mut().enumerate() {
@@ -187,11 +202,13 @@ impl Flow for MulticolFlow {
     }
 
     fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
-        self.block_flow.update_late_computed_inline_position_if_necessary(inline_position)
+        self.block_flow
+            .update_late_computed_inline_position_if_necessary(inline_position)
     }
 
     fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
-        self.block_flow.update_late_computed_block_position_if_necessary(block_position)
+        self.block_flow
+            .update_late_computed_block_position_if_necessary(block_position)
     }
 
     fn build_display_list(&mut self, state: &mut DisplayListBuildState) {
@@ -223,11 +240,17 @@ impl Flow for MulticolFlow {
         self.block_flow.generated_containing_block_size(flow)
     }
 
-    fn iterate_through_fragment_border_boxes(&self,
-                                             iterator: &mut FragmentBorderBoxIterator,
-                                             level: i32,
-                                             stacking_context_position: &Point2D<Au>) {
-        self.block_flow.iterate_through_fragment_border_boxes(iterator, level, stacking_context_position);
+    fn iterate_through_fragment_border_boxes(
+        &self,
+        iterator: &mut FragmentBorderBoxIterator,
+        level: i32,
+        stacking_context_position: &Point2D<Au>,
+    ) {
+        self.block_flow.iterate_through_fragment_border_boxes(
+            iterator,
+            level,
+            stacking_context_position,
+        );
     }
 
     fn mutate_fragments(&mut self, mutator: &mut FnMut(&mut Fragment)) {
@@ -257,7 +280,10 @@ impl Flow for MulticolColumnFlow {
     }
 
     fn assign_inline_sizes(&mut self, layout_context: &LayoutContext) {
-        debug!("assign_inline_sizes({}): assigning inline_size for flow", "multicol column");
+        debug!(
+            "assign_inline_sizes({}): assigning inline_size for flow",
+            "multicol column"
+        );
         self.block_flow.assign_inline_sizes(layout_context);
     }
 
@@ -266,22 +292,27 @@ impl Flow for MulticolColumnFlow {
         self.block_flow.assign_block_size(ctx);
     }
 
-    fn fragment(&mut self, layout_context: &LayoutContext,
-                fragmentation_context: Option<FragmentationContext>)
-                -> Option<Arc<Flow>> {
+    fn fragment(
+        &mut self,
+        layout_context: &LayoutContext,
+        fragmentation_context: Option<FragmentationContext>,
+    ) -> Option<Arc<Flow>> {
         Flow::fragment(&mut self.block_flow, layout_context, fragmentation_context)
     }
 
     fn compute_stacking_relative_position(&mut self, layout_context: &LayoutContext) {
-        self.block_flow.compute_stacking_relative_position(layout_context)
+        self.block_flow
+            .compute_stacking_relative_position(layout_context)
     }
 
     fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
-        self.block_flow.update_late_computed_inline_position_if_necessary(inline_position)
+        self.block_flow
+            .update_late_computed_inline_position_if_necessary(inline_position)
     }
 
     fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
-        self.block_flow.update_late_computed_block_position_if_necessary(block_position)
+        self.block_flow
+            .update_late_computed_block_position_if_necessary(block_position)
     }
 
     fn build_display_list(&mut self, state: &mut DisplayListBuildState) {
@@ -313,11 +344,17 @@ impl Flow for MulticolColumnFlow {
         self.block_flow.generated_containing_block_size(flow)
     }
 
-    fn iterate_through_fragment_border_boxes(&self,
-                                             iterator: &mut FragmentBorderBoxIterator,
-                                             level: i32,
-                                             stacking_context_position: &Point2D<Au>) {
-        self.block_flow.iterate_through_fragment_border_boxes(iterator, level, stacking_context_position);
+    fn iterate_through_fragment_border_boxes(
+        &self,
+        iterator: &mut FragmentBorderBoxIterator,
+        level: i32,
+        stacking_context_position: &Point2D<Au>,
+    ) {
+        self.block_flow.iterate_through_fragment_border_boxes(
+            iterator,
+            level,
+            stacking_context_position,
+        );
     }
 
     fn mutate_fragments(&mut self, mutator: &mut FnMut(&mut Fragment)) {

components/layout/parallel.rs

@@ -70,56 +70,57 @@ impl FlowParallelInfo {
 ///
 /// The only communication between siblings is that they both
 /// fetch-and-subtract the parent's children count.
-fn bottom_up_flow(mut unsafe_flow: UnsafeFlow,
-                  assign_bsize_traversal: &AssignBSizes) {
+fn bottom_up_flow(mut unsafe_flow: UnsafeFlow, assign_bsize_traversal: &AssignBSizes) {
     loop {
         // Get a real flow.
-        let flow: &mut Flow = unsafe {
-            mem::transmute(unsafe_flow)
-        };
+        let flow: &mut Flow = unsafe { mem::transmute(unsafe_flow) };
 
         // Perform the appropriate traversal.
         if assign_bsize_traversal.should_process(flow) {
             assign_bsize_traversal.process(flow);
         }
 
-
         let base = flow.mut_base();
 
         // Reset the count of children for the next layout traversal.
-        base.parallel.children_count.store(base.children.len() as isize,
-                                           Ordering::Relaxed);
+        base.parallel
+            .children_count
+            .store(base.children.len() as isize, Ordering::Relaxed);
 
         // Possibly enqueue the parent.
         let unsafe_parent = base.parallel.parent;
         if unsafe_parent == null_unsafe_flow() {
             // We're done!
-            break
+            break;
         }
 
         // No, we're not at the root yet. Then are we the last child
         // of our parent to finish processing? If so, we can continue
         // on with our parent; otherwise, we've gotta wait.
-        let parent: &mut Flow = unsafe {
-            &mut *(unsafe_parent.0 as *mut Flow)
-        };
+        let parent: &mut Flow = unsafe { &mut *(unsafe_parent.0 as *mut Flow) };
         let parent_base = parent.mut_base();
-        if parent_base.parallel.children_count.fetch_sub(1, Ordering::Relaxed) == 1 {
+        if parent_base
+            .parallel
+            .children_count
+            .fetch_sub(1, Ordering::Relaxed) ==
+            1
+        {
             // We were the last child of our parent. Reflow our parent.
             unsafe_flow = unsafe_parent
         } else {
             // Stop.
-            break
+            break;
         }
     }
 }
 
-fn top_down_flow<'scope>(unsafe_flows: &[UnsafeFlow],
-                         pool: &'scope rayon::ThreadPool,
-                         scope: &rayon::Scope<'scope>,
-                         assign_isize_traversal: &'scope AssignISizes,
-                         assign_bsize_traversal: &'scope AssignBSizes)
-{
+fn top_down_flow<'scope>(
+    unsafe_flows: &[UnsafeFlow],
+    pool: &'scope rayon::ThreadPool,
+    scope: &rayon::Scope<'scope>,
+    assign_isize_traversal: &'scope AssignISizes,
+    assign_bsize_traversal: &'scope AssignBSizes,
+) {
     let mut discovered_child_flows = FlowList::new();
 
     for unsafe_flow in unsafe_flows {
@@ -127,8 +128,7 @@ fn top_down_flow<'scope>(unsafe_flows: &[UnsafeFlow],
         unsafe {
             // Get a real flow.
             let flow: &mut Flow = mem::transmute(*unsafe_flow);
-            flow.mut_base().thread_id =
-                pool.current_thread_index().unwrap() as u8;
+            flow.mut_base().thread_id = pool.current_thread_index().unwrap() as u8;
 
             if assign_isize_traversal.should_process(flow) {
                 // Perform the appropriate traversal.
@@ -149,16 +149,18 @@ fn top_down_flow<'scope>(unsafe_flows: &[UnsafeFlow],
     }
 
     if discovered_child_flows.is_empty() {
-        return
+        return;
     }
 
     if discovered_child_flows.len() <= CHUNK_SIZE {
         // We can handle all the children in this work unit.
-        top_down_flow(&discovered_child_flows,
-                      pool,
-                      scope,
-                      &assign_isize_traversal,
-                      &assign_bsize_traversal);
+        top_down_flow(
+            &discovered_child_flows,
+            pool,
+            scope,
+            &assign_isize_traversal,
+            &assign_bsize_traversal,
+        );
     } else {
         // Spawn a new work unit for each chunk after the first.
         let mut chunks = discovered_child_flows.chunks(CHUNK_SIZE);
@@ -166,37 +168,66 @@ fn top_down_flow<'scope>(unsafe_flows: &[UnsafeFlow],
         for chunk in chunks {
             let nodes = chunk.iter().cloned().collect::<FlowList>();
             scope.spawn(move |scope| {
-                top_down_flow(&nodes, pool, scope, &assign_isize_traversal, &assign_bsize_traversal);
+                top_down_flow(
+                    &nodes,
+                    pool,
+                    scope,
+                    &assign_isize_traversal,
+                    &assign_bsize_traversal,
+                );
             });
         }
         if let Some(chunk) = first_chunk {
-            top_down_flow(chunk, pool, scope, &assign_isize_traversal, &assign_bsize_traversal);
+            top_down_flow(
+                chunk,
+                pool,
+                scope,
+                &assign_isize_traversal,
+                &assign_bsize_traversal,
+            );
         }
     }
 }
 
 /// Run the main layout passes in parallel.
 pub fn reflow(
-        root: &mut Flow,
-        profiler_metadata: Option<TimerMetadata>,
-        time_profiler_chan: time::ProfilerChan,
-        context: &LayoutContext,
-        queue: &rayon::ThreadPool) {
+    root: &mut Flow,
+    profiler_metadata: Option<TimerMetadata>,
+    time_profiler_chan: time::ProfilerChan,
+    context: &LayoutContext,
+    queue: &rayon::ThreadPool,
+) {
     if opts::get().bubble_inline_sizes_separately {
-        let bubble_inline_sizes = BubbleISizes { layout_context: &context };
+        let bubble_inline_sizes = BubbleISizes {
+            layout_context: &context,
+        };
         bubble_inline_sizes.traverse(root);
     }
 
-    let assign_isize_traversal = &AssignISizes { layout_context: &context };
-    let assign_bsize_traversal = &AssignBSizes { layout_context: &context };
+    let assign_isize_traversal = &AssignISizes {
+        layout_context: &context,
+    };
+    let assign_bsize_traversal = &AssignBSizes {
+        layout_context: &context,
+    };
     let nodes = [UnsafeFlow(root)];
 
     queue.install(move || {
         rayon::scope(move |scope| {
-            profile(time::ProfilerCategory::LayoutParallelWarmup,
-                    profiler_metadata, time_profiler_chan, move || {
-                        top_down_flow(&nodes, queue, scope, assign_isize_traversal, assign_bsize_traversal);
-            });
+            profile(
+                time::ProfilerCategory::LayoutParallelWarmup,
+                profiler_metadata,
+                time_profiler_chan,
+                move || {
+                    top_down_flow(
+                        &nodes,
+                        queue,
+                        scope,
+                        assign_isize_traversal,
+                        assign_bsize_traversal,
+                    );
+                },
+            );
         });
     });
 }

components/layout/persistent_list.rs

@@ -18,7 +18,10 @@ struct PersistentListEntry<T> {
 
 type PersistentListLink<T> = Option<Arc<PersistentListEntry<T>>>;
 
-impl<T> PersistentList<T> where T: Send + Sync {
+impl<T> PersistentList<T>
+where
+    T: Send + Sync,
+{
     #[inline]
     pub fn new() -> PersistentList<T> {
         PersistentList {
@@ -58,7 +61,10 @@ impl<T> PersistentList<T> where T: Send + Sync {
     }
 }
 
-impl<T> Clone for PersistentList<T> where T: Send + Sync {
+impl<T> Clone for PersistentList<T>
+where
+    T: Send + Sync,
+{
     fn clone(&self) -> PersistentList<T> {
         // This establishes the persistent nature of this list: we can clone a list by just cloning
         // its head.
@@ -69,11 +75,17 @@ impl<T> Clone for PersistentList<T> where T: Send + Sync {
     }
 }
 
-pub struct PersistentListIterator<'a, T> where T: 'a + Send + Sync {
+pub struct PersistentListIterator<'a, T>
+where
+    T: 'a + Send + Sync,
+{
     entry: Option<&'a PersistentListEntry<T>>,
 }
 
-impl<'a, T> Iterator for PersistentListIterator<'a, T> where T: Send + Sync + 'static {
+impl<'a, T> Iterator for PersistentListIterator<'a, T>
+where
+    T: Send + Sync + 'static,
+{
     type Item = &'a T;
 
     #[inline]

components/layout/query.rs

@@ -94,13 +94,24 @@ pub struct LayoutRPCImpl(pub Arc<Mutex<LayoutThreadData>>);
 
 // https://drafts.csswg.org/cssom-view/#overflow-directions
 fn overflow_direction(writing_mode: &WritingMode) -> OverflowDirection {
-    match (writing_mode.block_flow_direction(), writing_mode.inline_base_direction()) {
+    match (
+        writing_mode.block_flow_direction(),
+        writing_mode.inline_base_direction(),
+    ) {
         (BlockFlowDirection::TopToBottom, InlineBaseDirection::LeftToRight) |
-            (BlockFlowDirection::LeftToRight, InlineBaseDirection::LeftToRight) => OverflowDirection::RightAndDown,
+        (BlockFlowDirection::LeftToRight, InlineBaseDirection::LeftToRight) => {
+            OverflowDirection::RightAndDown
+        },
         (BlockFlowDirection::TopToBottom, InlineBaseDirection::RightToLeft) |
-            (BlockFlowDirection::RightToLeft, InlineBaseDirection::LeftToRight) => OverflowDirection::LeftAndDown,
-        (BlockFlowDirection::RightToLeft, InlineBaseDirection::RightToLeft) => OverflowDirection::LeftAndUp,
-        (BlockFlowDirection::LeftToRight, InlineBaseDirection::RightToLeft) => OverflowDirection::RightAndUp
+        (BlockFlowDirection::RightToLeft, InlineBaseDirection::LeftToRight) => {
+            OverflowDirection::LeftAndDown
+        },
+        (BlockFlowDirection::RightToLeft, InlineBaseDirection::RightToLeft) => {
+            OverflowDirection::LeftAndUp
+        },
+        (BlockFlowDirection::LeftToRight, InlineBaseDirection::RightToLeft) => {
+            OverflowDirection::RightAndUp
+        },
     }
 }
 
@@ -130,20 +141,24 @@ impl LayoutRPC for LayoutRPCImpl {
         let &LayoutRPCImpl(ref rw_data) = self;
         let rw_data = rw_data.lock().unwrap();
         NodeGeometryResponse {
-            client_rect: rw_data.client_rect_response
+            client_rect: rw_data.client_rect_response,
         }
     }
 
     fn node_scroll_area(&self) -> NodeGeometryResponse {
         NodeGeometryResponse {
-            client_rect: self.0.lock().unwrap().scroll_area_response
+            client_rect: self.0.lock().unwrap().scroll_area_response,
         }
     }
 
     fn node_scroll_id(&self) -> NodeScrollIdResponse {
-        NodeScrollIdResponse(self.0.lock()
-                             .unwrap().scroll_id_response
-                             .expect("scroll id is not correctly fetched"))
+        NodeScrollIdResponse(
+            self.0
+                .lock()
+                .unwrap()
+                .scroll_id_response
+                .expect("scroll id is not correctly fetched"),
+        )
     }
 
     /// Retrieves the resolved value for a CSS style property.
@@ -187,7 +202,7 @@ impl UnioningFragmentBorderBoxIterator {
     fn new(node_address: OpaqueNode) -> UnioningFragmentBorderBoxIterator {
         UnioningFragmentBorderBoxIterator {
             node_address: node_address,
-            rect: None
+            rect: None,
         }
     }
 }
@@ -195,12 +210,8 @@ impl UnioningFragmentBorderBoxIterator {
 impl FragmentBorderBoxIterator for UnioningFragmentBorderBoxIterator {
     fn process(&mut self, _: &Fragment, _: i32, border_box: &Rect<Au>) {
         self.rect = match self.rect {
-            Some(rect) => {
-                Some(rect.union(border_box))
-            }
-            None => {
-                Some(*border_box)
-            }
+            Some(rect) => Some(rect.union(border_box)),
+            None => Some(*border_box),
         };
     }
 
@@ -237,12 +248,12 @@ enum Side {
     Left,
     Right,
     Bottom,
-    Top
+    Top,
 }
 
 enum MarginPadding {
     Margin,
-    Padding
+    Padding,
 }
 
 enum PositionProperty {
@@ -270,9 +281,11 @@ struct PositionRetrievingFragmentBorderBoxIterator {
 }
 
 impl PositionRetrievingFragmentBorderBoxIterator {
-    fn new(node_address: OpaqueNode,
-           property: PositionProperty,
-           position: Point2D<Au>) -> PositionRetrievingFragmentBorderBoxIterator {
+    fn new(
+        node_address: OpaqueNode,
+        property: PositionProperty,
+        position: Point2D<Au>,
+    ) -> PositionRetrievingFragmentBorderBoxIterator {
         PositionRetrievingFragmentBorderBoxIterator {
             node_address: node_address,
             position: position,
@@ -284,18 +297,19 @@ impl PositionRetrievingFragmentBorderBoxIterator {
 
 impl FragmentBorderBoxIterator for PositionRetrievingFragmentBorderBoxIterator {
     fn process(&mut self, fragment: &Fragment, _: i32, border_box: &Rect<Au>) {
-        let border_padding = fragment.border_padding.to_physical(fragment.style.writing_mode);
-        self.result =
-            Some(match self.property {
-                     PositionProperty::Left => self.position.x,
-                     PositionProperty::Top => self.position.y,
-                     PositionProperty::Width => border_box.size.width - border_padding.horizontal(),
-                     PositionProperty::Height => border_box.size.height - border_padding.vertical(),
-                     // TODO: the following 2 calculations are completely wrong.
-                     // They should return the difference between the parent's and this
-                     // fragment's border boxes.
-                     PositionProperty::Right => border_box.max_x() + self.position.x,
-                     PositionProperty::Bottom => border_box.max_y() + self.position.y,
+        let border_padding = fragment
+            .border_padding
+            .to_physical(fragment.style.writing_mode);
+        self.result = Some(match self.property {
+            PositionProperty::Left => self.position.x,
+            PositionProperty::Top => self.position.y,
+            PositionProperty::Width => border_box.size.width - border_padding.horizontal(),
+            PositionProperty::Height => border_box.size.height - border_padding.vertical(),
+            // TODO: the following 2 calculations are completely wrong.
+            // They should return the difference between the parent's and this
+            // fragment's border boxes.
+            PositionProperty::Right => border_box.max_x() + self.position.x,
+            PositionProperty::Bottom => border_box.max_y() + self.position.y,
         });
     }
 
@@ -313,8 +327,12 @@ struct MarginRetrievingFragmentBorderBoxIterator {
 }
 
 impl MarginRetrievingFragmentBorderBoxIterator {
-    fn new(node_address: OpaqueNode, side: Side, margin_padding:
-    MarginPadding, writing_mode: WritingMode) -> MarginRetrievingFragmentBorderBoxIterator {
+    fn new(
+        node_address: OpaqueNode,
+        side: Side,
+        margin_padding: MarginPadding,
+        writing_mode: WritingMode,
+    ) -> MarginRetrievingFragmentBorderBoxIterator {
         MarginRetrievingFragmentBorderBoxIterator {
             node_address: node_address,
             side: side,
@@ -329,13 +347,13 @@ impl FragmentBorderBoxIterator for MarginRetrievingFragmentBorderBoxIterator {
     fn process(&mut self, fragment: &Fragment, _: i32, _: &Rect<Au>) {
         let rect = match self.margin_padding {
             MarginPadding::Margin => &fragment.margin,
-            MarginPadding::Padding => &fragment.border_padding
+            MarginPadding::Padding => &fragment.border_padding,
         };
         self.result = Some(match self.side {
-                               Side::Left => rect.left(self.writing_mode),
-                               Side::Right => rect.right(self.writing_mode),
-                               Side::Bottom => rect.bottom(self.writing_mode),
-                               Side::Top => rect.top(self.writing_mode)
+            Side::Left => rect.left(self.writing_mode),
+            Side::Right => rect.right(self.writing_mode),
+            Side::Bottom => rect.bottom(self.writing_mode),
+            Side::Top => rect.top(self.writing_mode),
         });
     }
 
@@ -345,7 +363,9 @@ impl FragmentBorderBoxIterator for MarginRetrievingFragmentBorderBoxIterator {
 }
 
 pub fn process_content_box_request<N: LayoutNode>(
-        requested_node: N, layout_root: &mut Flow) -> Option<Rect<Au>> {
+    requested_node: N,
+    layout_root: &mut Flow,
+) -> Option<Rect<Au>> {
     // FIXME(pcwalton): This has not been updated to handle the stacking context relative
     // stuff. So the position is wrong in most cases.
     let mut iterator = UnioningFragmentBorderBoxIterator::new(requested_node.opaque());
@@ -353,8 +373,10 @@ pub fn process_content_box_request<N: LayoutNode>(
     iterator.rect
 }
 
-pub fn process_content_boxes_request<N: LayoutNode>(requested_node: N, layout_root: &mut Flow)
-        -> Vec<Rect<Au>> {
+pub fn process_content_boxes_request<N: LayoutNode>(
+    requested_node: N,
+    layout_root: &mut Flow,
+) -> Vec<Rect<Au>> {
     // FIXME(pcwalton): This has not been updated to handle the stacking context relative
     // stuff. So the position is wrong in most cases.
     let mut iterator = CollectingFragmentBorderBoxIterator::new(requested_node.opaque());
@@ -371,7 +393,7 @@ impl FragmentLocatingFragmentIterator {
     fn new(node_address: OpaqueNode) -> FragmentLocatingFragmentIterator {
         FragmentLocatingFragmentIterator {
             node_address: node_address,
-            client_rect: Rect::zero()
+            client_rect: Rect::zero(),
         }
     }
 }
@@ -382,7 +404,7 @@ struct UnioningFragmentScrollAreaIterator {
     origin_rect: Rect<i32>,
     level: Option<i32>,
     is_child: bool,
-    overflow_direction: OverflowDirection
+    overflow_direction: OverflowDirection,
 }
 
 impl UnioningFragmentScrollAreaIterator {
@@ -394,7 +416,7 @@ impl UnioningFragmentScrollAreaIterator {
             level: None,
             is_child: false,
             // FIXME(#20867)
-            overflow_direction: OverflowDirection::RightAndDown
+            overflow_direction: OverflowDirection::RightAndDown,
         }
     }
 }
@@ -469,29 +491,38 @@ impl FragmentBorderBoxIterator for UnioningFragmentScrollAreaIterator {
         let (left_border, right_border) = (left_border.px(), right_border.px());
         let (top_border, bottom_border) = (top_border.px(), bottom_border.px());
         let right_padding = (border_box.size.width.to_f32_px() - right_border - left_border) as i32;
-        let bottom_padding = (border_box.size.height.to_f32_px() - bottom_border - top_border) as i32;
+        let bottom_padding =
+            (border_box.size.height.to_f32_px() - bottom_border - top_border) as i32;
         let top_padding = top_border as i32;
         let left_padding = left_border as i32;
 
         match self.level {
-            Some(start_level) if level <= start_level => { self.is_child = false; }
+            Some(start_level) if level <= start_level => {
+                self.is_child = false;
+            },
             Some(_) => {
-                let padding = Rect::new(Point2D::new(left_padding, top_padding),
-                                        Size2D::new(right_padding, bottom_padding));
+                let padding = Rect::new(
+                    Point2D::new(left_padding, top_padding),
+                    Size2D::new(right_padding, bottom_padding),
+                );
                 let top_margin = fragment.margin.top(fragment.style.writing_mode).to_px();
                 let left_margin = fragment.margin.left(fragment.style.writing_mode).to_px();
                 let bottom_margin = fragment.margin.bottom(fragment.style.writing_mode).to_px();
                 let right_margin = fragment.margin.right(fragment.style.writing_mode).to_px();
-                let margin = Rect::new(Point2D::new(left_margin, top_margin),
-                                       Size2D::new(right_margin, bottom_margin));
+                let margin = Rect::new(
+                    Point2D::new(left_margin, top_margin),
+                    Size2D::new(right_margin, bottom_margin),
+                );
                 self.union_rect = self.union_rect.union(&margin).union(&padding);
-            }
+            },
             None => {
                 self.level = Some(level);
                 self.is_child = true;
                 self.overflow_direction = overflow_direction(&fragment.style.writing_mode);
-                self.origin_rect = Rect::new(Point2D::new(left_padding, top_padding),
-                                             Size2D::new(right_padding, bottom_padding));
+                self.origin_rect = Rect::new(
+                    Point2D::new(left_padding, top_padding),
+                    Size2D::new(right_padding, bottom_padding),
+                );
             },
         };
     }
@@ -509,8 +540,11 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
             // for its parent. Remove all nodes at this level or
             // higher, as they can't be parents of this node.
             self.parent_nodes.truncate(level as usize);
-            assert_eq!(self.parent_nodes.len(), level as usize,
-                "Skipped at least one level in the flow tree!");
+            assert_eq!(
+                self.parent_nodes.len(),
+                level as usize,
+                "Skipped at least one level in the flow tree!"
+            );
         }
 
         if !fragment.is_primary_fragment() {
@@ -530,8 +564,10 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
             // Found the fragment in the flow tree that matches the
             // DOM node being looked for.
 
-            assert!(self.node_offset_box.is_none(),
-                "Node was being treated as inline, but it has an associated fragment!");
+            assert!(
+                self.node_offset_box.is_none(),
+                "Node was being treated as inline, but it has an associated fragment!"
+            );
 
             self.has_processed_node = true;
             self.node_offset_box = Some(NodeOffsetBoxInfo {
@@ -544,7 +580,10 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
                 self.parent_nodes.clear();
             }
         } else if let Some(node) = fragment.inline_context.as_ref().and_then(|inline_context| {
-            inline_context.nodes.iter().find(|node| node.address == self.node_address)
+            inline_context
+                .nodes
+                .iter()
+                .find(|node| node.address == self.node_address)
         }) {
             // TODO: Handle cases where the `offsetParent` is an inline
             // element. This will likely be impossible until
@@ -554,7 +593,9 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
             // contains the DOM node we're looking for, i.e. the node
             // is inline and contains this fragment.
             match self.node_offset_box {
-                Some(NodeOffsetBoxInfo { ref mut rectangle, .. }) => {
+                Some(NodeOffsetBoxInfo {
+                    ref mut rectangle, ..
+                }) => {
                     *rectangle = rectangle.union(border_box);
                 },
                 None => {
@@ -571,7 +612,10 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
                 },
             }
 
-            if node.flags.contains(InlineFragmentNodeFlags::LAST_FRAGMENT_OF_ELEMENT) {
+            if node
+                .flags
+                .contains(InlineFragmentNodeFlags::LAST_FRAGMENT_OF_ELEMENT)
+            {
                 self.has_processed_node = true;
             }
         } else if self.node_offset_box.is_none() {
@@ -580,9 +624,11 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
             // it's at level 1 (below the root node)?
             let is_body_element = level == 1;
 
-            let is_valid_parent = match (is_body_element,
-                                         fragment.style.get_box().position,
-                                         &fragment.specific) {
+            let is_valid_parent = match (
+                is_body_element,
+                fragment.style.get_box().position,
+                &fragment.specific,
+            ) {
                 // Spec says it's valid if any of these are true:
                 //  1) Is the body element
                 //  2) Is static position *and* is a table or table cell
@@ -600,7 +646,9 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
             };
 
             let parent_info = if is_valid_parent {
-                let border_width = fragment.border_width().to_physical(fragment.style.writing_mode);
+                let border_width = fragment
+                    .border_width()
+                    .to_physical(fragment.style.writing_mode);
 
                 Some(ParentBorderBoxInfo {
                     node_address: fragment.node,
@@ -619,9 +667,10 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
     }
 }
 
-
-pub fn process_node_geometry_request<N: LayoutNode>(requested_node: N, layout_root: &mut Flow)
-        -> Rect<i32> {
+pub fn process_node_geometry_request<N: LayoutNode>(
+    requested_node: N,
+    layout_root: &mut Flow,
+) -> Rect<i32> {
     let mut iterator = FragmentLocatingFragmentIterator::new(requested_node.opaque());
     sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
     iterator.client_rect
@@ -629,28 +678,41 @@ pub fn process_node_geometry_request<N: LayoutNode>(requested_node: N, layout_ro
 
 pub fn process_node_scroll_id_request<N: LayoutNode>(
     id: PipelineId,
-    requested_node: N
+    requested_node: N,
 ) -> ExternalScrollId {
     let layout_node = requested_node.to_threadsafe();
     layout_node.generate_scroll_id(id)
 }
 
 /// https://drafts.csswg.org/cssom-view/#scrolling-area
-pub fn process_node_scroll_area_request< N: LayoutNode>(requested_node: N, layout_root: &mut Flow)
-        -> Rect<i32> {
+pub fn process_node_scroll_area_request<N: LayoutNode>(
+    requested_node: N,
+    layout_root: &mut Flow,
+) -> Rect<i32> {
     let mut iterator = UnioningFragmentScrollAreaIterator::new(requested_node.opaque());
     sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
     match iterator.overflow_direction {
         OverflowDirection::RightAndDown => {
-            let right = max(iterator.union_rect.size.width, iterator.origin_rect.size.width);
-            let bottom = max(iterator.union_rect.size.height, iterator.origin_rect.size.height);
+            let right = max(
+                iterator.union_rect.size.width,
+                iterator.origin_rect.size.width,
+            );
+            let bottom = max(
+                iterator.union_rect.size.height,
+                iterator.origin_rect.size.height,
+            );
             Rect::new(iterator.origin_rect.origin, Size2D::new(right, bottom))
         },
         OverflowDirection::LeftAndDown => {
-            let bottom = max(iterator.union_rect.size.height, iterator.origin_rect.size.height);
+            let bottom = max(
+                iterator.union_rect.size.height,
+                iterator.origin_rect.size.height,
+            );
             let left = min(iterator.union_rect.origin.x, iterator.origin_rect.origin.x);
-            Rect::new(Point2D::new(left, iterator.origin_rect.origin.y),
-                      Size2D::new(iterator.origin_rect.size.width, bottom))
+            Rect::new(
+                Point2D::new(left, iterator.origin_rect.origin.y),
+                Size2D::new(iterator.origin_rect.size.width, bottom),
+            )
         },
         OverflowDirection::LeftAndUp => {
             let top = min(iterator.union_rect.origin.y, iterator.origin_rect.origin.y);
@@ -659,21 +721,29 @@ pub fn process_node_scroll_area_request< N: LayoutNode>(requested_node: N, layou
         },
         OverflowDirection::RightAndUp => {
             let top = min(iterator.union_rect.origin.y, iterator.origin_rect.origin.y);
-            let right = max(iterator.union_rect.size.width, iterator.origin_rect.size.width);
-            Rect::new(Point2D::new(iterator.origin_rect.origin.x, top),
-                      Size2D::new(right, iterator.origin_rect.size.height))
-        }
+            let right = max(
+                iterator.union_rect.size.width,
+                iterator.origin_rect.size.width,
+            );
+            Rect::new(
+                Point2D::new(iterator.origin_rect.origin.x, top),
+                Size2D::new(right, iterator.origin_rect.size.height),
+            )
+        },
     }
 }
 
 /// Return the resolved value of property for a given (pseudo)element.
 /// <https://drafts.csswg.org/cssom/#resolved-value>
-pub fn process_resolved_style_request<'a, N>(context: &LayoutContext,
-                                             node: N,
-                                             pseudo: &Option<PseudoElement>,
-                                             property: &PropertyId,
-                                             layout_root: &mut Flow) -> String
-    where N: LayoutNode,
+pub fn process_resolved_style_request<'a, N>(
+    context: &LayoutContext,
+    node: N,
+    pseudo: &Option<PseudoElement>,
+    property: &PropertyId,
+    layout_root: &mut Flow,
+) -> String
+where
+    N: LayoutNode,
 {
     use style::stylist::RuleInclusion;
     use style::traversal::resolve_style;
@@ -700,15 +770,13 @@ pub fn process_resolved_style_request<'a, N>(context: &LayoutContext,
     let styles = resolve_style(&mut context, element, RuleInclusion::All, pseudo.as_ref());
     let style = styles.primary();
     let longhand_id = match *property {
-        PropertyId::LonghandAlias(id, _) |
-        PropertyId::Longhand(id) => id,
+        PropertyId::LonghandAlias(id, _) | PropertyId::Longhand(id) => id,
         // Firefox returns blank strings for the computed value of shorthands,
         // so this should be web-compatible.
-        PropertyId::ShorthandAlias(..) |
-        PropertyId::Shorthand(_) => return String::new(),
+        PropertyId::ShorthandAlias(..) | PropertyId::Shorthand(_) => return String::new(),
         PropertyId::Custom(ref name) => {
             return style.computed_value_to_string(PropertyDeclarationId::Custom(name))
-        }
+        },
     };
 
     // No need to care about used values here, since we're on a display: none
@@ -735,7 +803,7 @@ where
         Some(PseudoElement::Selection) => None,
         // FIXME(emilio): What about the other pseudos? Probably they shouldn't
         // just return the element's style!
-        _ => Some(layout_el)
+        _ => Some(layout_el),
     };
 
     let layout_el = match layout_el {
@@ -744,29 +812,24 @@ where
             // the element itself in this case, Firefox uses the resolved value.
             // https://www.w3.org/Bugs/Public/show_bug.cgi?id=29006
             return String::new();
-        }
-        Some(layout_el) => layout_el
+        },
+        Some(layout_el) => layout_el,
     };
 
     let style = &*layout_el.resolved_style();
     let longhand_id = match *property {
-        PropertyId::LonghandAlias(id, _) |
-        PropertyId::Longhand(id) => id,
+        PropertyId::LonghandAlias(id, _) | PropertyId::Longhand(id) => id,
         // Firefox returns blank strings for the computed value of shorthands,
         // so this should be web-compatible.
-        PropertyId::ShorthandAlias(..) |
-        PropertyId::Shorthand(_) => return String::new(),
+        PropertyId::ShorthandAlias(..) | PropertyId::Shorthand(_) => return String::new(),
         PropertyId::Custom(ref name) => {
             return style.computed_value_to_string(PropertyDeclarationId::Custom(name))
-        }
+        },
     };
 
     let positioned = match style.get_box().position {
-        Position::Relative |
-        Position::Sticky |
-        Position::Fixed |
-        Position::Absolute => true,
-        _ => false
+        Position::Relative | Position::Sticky | Position::Fixed | Position::Absolute => true,
+        _ => false,
     };
 
     //TODO: determine whether requested property applies to the element.
@@ -780,15 +843,20 @@ where
             layout_el: <N::ConcreteThreadSafeLayoutNode as ThreadSafeLayoutNode>::ConcreteThreadSafeLayoutElement,
             layout_root: &mut Flow,
             requested_node: N,
-            longhand_id: LonghandId) -> String {
+            longhand_id: LonghandId,
+        ) -> String
+    {
         let maybe_data = layout_el.borrow_layout_data();
         let position = maybe_data.map_or(Point2D::zero(), |data| {
             match (*data).flow_construction_result {
-                ConstructionResult::Flow(ref flow_ref, _) =>
-                    flow_ref.deref().base().stacking_relative_position.to_point(),
+                ConstructionResult::Flow(ref flow_ref, _) => flow_ref
+                    .deref()
+                    .base()
+                    .stacking_relative_position
+                    .to_point(),
                 // TODO(dzbarsky) search parents until we find node with a flow ref.
                 // https://github.com/servo/servo/issues/8307
-                _ => Point2D::zero()
+                _ => Point2D::zero(),
             }
         });
         let property = match longhand_id {
@@ -798,24 +866,32 @@ where
             LonghandId::Right => PositionProperty::Right,
             LonghandId::Width => PositionProperty::Width,
             LonghandId::Height => PositionProperty::Height,
-            _ => unreachable!()
+            _ => unreachable!(),
         };
-        let mut iterator =
-            PositionRetrievingFragmentBorderBoxIterator::new(requested_node.opaque(),
-                                                             property,
-                                                             position);
-        sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root,
-                                                                    &mut iterator);
-        iterator.result.map(|r| r.to_css_string()).unwrap_or(String::new())
+        let mut iterator = PositionRetrievingFragmentBorderBoxIterator::new(
+            requested_node.opaque(),
+            property,
+            position,
+        );
+        sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
+        iterator
+            .result
+            .map(|r| r.to_css_string())
+            .unwrap_or(String::new())
     }
 
     // TODO: we will return neither the computed nor used value for margin and padding.
     match longhand_id {
-        LonghandId::MarginBottom | LonghandId::MarginTop |
-        LonghandId::MarginLeft | LonghandId::MarginRight |
-        LonghandId::PaddingBottom | LonghandId::PaddingTop |
-        LonghandId::PaddingLeft | LonghandId::PaddingRight
-        if applies && style.get_box().display != Display::None => {
+        LonghandId::MarginBottom |
+        LonghandId::MarginTop |
+        LonghandId::MarginLeft |
+        LonghandId::MarginRight |
+        LonghandId::PaddingBottom |
+        LonghandId::PaddingTop |
+        LonghandId::PaddingLeft |
+        LonghandId::PaddingRight
+            if applies && style.get_box().display != Display::None =>
+        {
             let (margin_padding, side) = match longhand_id {
                 LonghandId::MarginBottom => (MarginPadding::Margin, Side::Bottom),
                 LonghandId::MarginTop => (MarginPadding::Margin, Side::Top),
@@ -825,40 +901,50 @@ where
                 LonghandId::PaddingTop => (MarginPadding::Padding, Side::Top),
                 LonghandId::PaddingLeft => (MarginPadding::Padding, Side::Left),
                 LonghandId::PaddingRight => (MarginPadding::Padding, Side::Right),
-                _ => unreachable!()
+                _ => unreachable!(),
             };
-            let mut iterator =
-                MarginRetrievingFragmentBorderBoxIterator::new(requested_node.opaque(),
-                                                               side,
-                                                               margin_padding,
-                                                               style.writing_mode);
-            sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root,
-                                                                        &mut iterator);
-            iterator.result.map(|r| r.to_css_string()).unwrap_or(String::new())
-        },
+            let mut iterator = MarginRetrievingFragmentBorderBoxIterator::new(
+                requested_node.opaque(),
+                side,
+                margin_padding,
+                style.writing_mode,
+            );
+            sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
+            iterator
+                .result
+                .map(|r| r.to_css_string())
+                .unwrap_or(String::new())
+        }
 
         LonghandId::Bottom | LonghandId::Top | LonghandId::Right | LonghandId::Left
-        if applies && positioned && style.get_box().display != Display::None => {
+            if applies && positioned && style.get_box().display != Display::None =>
+        {
             used_value_for_position_property(layout_el, layout_root, requested_node, longhand_id)
-        }
+        },
         LonghandId::Width | LonghandId::Height
-        if applies && style.get_box().display != Display::None => {
+            if applies && style.get_box().display != Display::None =>
+        {
             used_value_for_position_property(layout_el, layout_root, requested_node, longhand_id)
-        }
+        },
         // FIXME: implement used value computation for line-height
-        _ => {
-            style.computed_value_to_string(PropertyDeclarationId::Longhand(longhand_id))
-        }
+        _ => style.computed_value_to_string(PropertyDeclarationId::Longhand(longhand_id)),
     }
 }
 
-pub fn process_offset_parent_query<N: LayoutNode>(requested_node: N, layout_root: &mut Flow)
-        -> OffsetParentResponse {
+pub fn process_offset_parent_query<N: LayoutNode>(
+    requested_node: N,
+    layout_root: &mut Flow,
+) -> OffsetParentResponse {
     let mut iterator = ParentOffsetBorderBoxIterator::new(requested_node.opaque());
     sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
 
     let node_offset_box = iterator.node_offset_box;
-    let parent_info = iterator.parent_nodes.into_iter().rev().filter_map(|info| info).next();
+    let parent_info = iterator
+        .parent_nodes
+        .into_iter()
+        .rev()
+        .filter_map(|info| info)
+        .next();
     match (node_offset_box, parent_info) {
         (Some(node_offset_box), Some(parent_info)) => {
             let origin = node_offset_box.offset - parent_info.origin.to_vector();
@@ -867,15 +953,12 @@ pub fn process_offset_parent_query<N: LayoutNode>(requested_node: N, layout_root
                 node_address: Some(parent_info.node_address.to_untrusted_node_address()),
                 rect: Rect::new(origin, size),
             }
-        }
-        _ => {
-            OffsetParentResponse::empty()
-        }
+        },
+        _ => OffsetParentResponse::empty(),
     }
 }
 
-pub fn process_style_query<N: LayoutNode>(requested_node: N)
-        -> StyleResponse {
+pub fn process_style_query<N: LayoutNode>(requested_node: N) -> StyleResponse {
     let element = requested_node.as_element().unwrap();
     let data = element.borrow_data();
 
@@ -888,8 +971,10 @@ enum InnerTextItem {
 }
 
 // https://html.spec.whatwg.org/multipage/#the-innertext-idl-attribute
-pub fn process_element_inner_text_query<N: LayoutNode>(node: N,
-                                                       indexable_text: &IndexableText) -> String {
+pub fn process_element_inner_text_query<N: LayoutNode>(
+    node: N,
+    indexable_text: &IndexableText,
+) -> String {
     // Step 1.
     let mut results = Vec::new();
     // Step 2.
@@ -923,7 +1008,7 @@ pub fn process_element_inner_text_query<N: LayoutNode>(node: N,
                 if count > max_req_line_break_count {
                     max_req_line_break_count = count;
                 }
-            }
+            },
         }
     }
     inner_text.into_iter().collect()
@@ -931,22 +1016,21 @@ pub fn process_element_inner_text_query<N: LayoutNode>(node: N,
 
 // https://html.spec.whatwg.org/multipage/#inner-text-collection-steps
 #[allow(unsafe_code)]
-fn inner_text_collection_steps<N: LayoutNode>(node: N,
-                                              indexable_text: &IndexableText,
-                                              results: &mut Vec<InnerTextItem>) {
+fn inner_text_collection_steps<N: LayoutNode>(
+    node: N,
+    indexable_text: &IndexableText,
+    results: &mut Vec<InnerTextItem>,
+) {
     let mut items = Vec::new();
     for child in node.traverse_preorder() {
         let node = match child.type_id() {
-            LayoutNodeType::Text => {
-                child.parent_node().unwrap()
-            },
+            LayoutNodeType::Text => child.parent_node().unwrap(),
             _ => child,
         };
 
         let element_data = unsafe {
-            node.get_style_and_layout_data().map(|d| {
-                &(*(d.ptr.as_ptr() as *mut StyleData)).element_data
-            })
+            node.get_style_and_layout_data()
+                .map(|d| &(*(d.ptr.as_ptr() as *mut StyleData)).element_data)
         };
 
         if element_data.is_none() {
@@ -980,15 +1064,16 @@ fn inner_text_collection_steps<N: LayoutNode>(node: N,
             },
             LayoutNodeType::Element(LayoutElementType::HTMLBRElement) => {
                 // Step 5.
-                items.push(InnerTextItem::Text(String::from("\u{000A}" /* line feed */)));
+                items.push(InnerTextItem::Text(String::from(
+                    "\u{000A}", /* line feed */
+                )));
             },
             LayoutNodeType::Element(LayoutElementType::HTMLParagraphElement) => {
                 // Step 8.
                 items.insert(0, InnerTextItem::RequiredLineBreakCount(2));
                 items.push(InnerTextItem::RequiredLineBreakCount(2));
-            }
+            },
             _ => {},
-
         }
 
         match display {

components/layout/sequential.rs

@@ -25,10 +25,12 @@ pub fn resolve_generated_content(root: &mut Flow, layout_context: &LayoutContext
 
 /// Run the main layout passes sequentially.
 pub fn reflow(root: &mut Flow, layout_context: &LayoutContext, relayout_mode: RelayoutMode) {
-    fn doit(flow: &mut Flow,
-            assign_inline_sizes: AssignISizes,
-            assign_block_sizes: AssignBSizes,
-            relayout_mode: RelayoutMode) {
+    fn doit(
+        flow: &mut Flow,
+        assign_inline_sizes: AssignISizes,
+        assign_block_sizes: AssignBSizes,
+        relayout_mode: RelayoutMode,
+    ) {
         // Force reflow children during this traversal. This is needed when we failed
         // the float speculation of a block formatting context and need to fix it.
         if relayout_mode == RelayoutMode::Force {
@@ -67,42 +69,47 @@ pub fn reflow(root: &mut Flow, layout_context: &LayoutContext, relayout_mode: Re
     doit(root, assign_inline_sizes, assign_block_sizes, relayout_mode);
 }
 
-pub fn build_display_list_for_subtree<'a>(flow_root: &mut Flow,
-                                          layout_context: &'a LayoutContext)
-                                          -> DisplayListBuildState<'a> {
+pub fn build_display_list_for_subtree<'a>(
+    flow_root: &mut Flow,
+    layout_context: &'a LayoutContext,
+) -> DisplayListBuildState<'a> {
     let mut state = StackingContextCollectionState::new(layout_context.id);
     flow_root.collect_stacking_contexts(&mut state);
 
     let state = DisplayListBuildState::new(layout_context, state);
-    let mut build_display_list = BuildDisplayList {
-        state: state,
-    };
+    let mut build_display_list = BuildDisplayList { state: state };
     build_display_list.traverse(flow_root);
     build_display_list.state
 }
 
-pub fn iterate_through_flow_tree_fragment_border_boxes(root: &mut Flow, iterator: &mut FragmentBorderBoxIterator) {
-    fn doit(flow: &mut Flow,
-            level: i32,
-            iterator: &mut FragmentBorderBoxIterator,
-            stacking_context_position: &Point2D<Au>) {
+pub fn iterate_through_flow_tree_fragment_border_boxes(
+    root: &mut Flow,
+    iterator: &mut FragmentBorderBoxIterator,
+) {
+    fn doit(
+        flow: &mut Flow,
+        level: i32,
+        iterator: &mut FragmentBorderBoxIterator,
+        stacking_context_position: &Point2D<Au>,
+    ) {
         flow.iterate_through_fragment_border_boxes(iterator, level, stacking_context_position);
 
         for kid in flow.mut_base().child_iter_mut() {
             let mut stacking_context_position = *stacking_context_position;
             if kid.is_block_flow() && kid.as_block().fragment.establishes_stacking_context() {
-                stacking_context_position = Point2D::new(kid.as_block().fragment.margin.inline_start, Au(0)) +
-                                            kid.base().stacking_relative_position +
-                                            stacking_context_position.to_vector();
-                let relative_position = kid.as_block()
+                stacking_context_position =
+                    Point2D::new(kid.as_block().fragment.margin.inline_start, Au(0)) +
+                        kid.base().stacking_relative_position +
+                        stacking_context_position.to_vector();
+                let relative_position = kid
+                    .as_block()
                     .stacking_relative_border_box(CoordinateSystem::Own);
-                if let Some(matrix) = kid.as_block()
-                       .fragment
-                       .transform_matrix(&relative_position) {
+                if let Some(matrix) = kid.as_block().fragment.transform_matrix(&relative_position) {
                     let transform_matrix = matrix.transform_point2d(&LayoutPoint::zero()).unwrap();
-                    stacking_context_position = stacking_context_position +
-                                                Vector2D::new(Au::from_f32_px(transform_matrix.x),
-                                                              Au::from_f32_px(transform_matrix.y))
+                    stacking_context_position = stacking_context_position + Vector2D::new(
+                        Au::from_f32_px(transform_matrix.x),
+                        Au::from_f32_px(transform_matrix.y),
+                    )
                 }
             }
             doit(kid, level + 1, iterator, &stacking_context_position);
@@ -113,7 +120,11 @@ pub fn iterate_through_flow_tree_fragment_border_boxes(root: &mut Flow, iterator
 }
 
 pub fn store_overflow(layout_context: &LayoutContext, flow: &mut Flow) {
-    if !flow.base().restyle_damage.contains(ServoRestyleDamage::STORE_OVERFLOW) {
+    if !flow
+        .base()
+        .restyle_damage
+        .contains(ServoRestyleDamage::STORE_OVERFLOW)
+    {
         return;
     }
 
@@ -132,13 +143,21 @@ pub fn store_overflow(layout_context: &LayoutContext, flow: &mut Flow) {
 /// given flow. This is needed to speculatively calculate the inline sizes of block formatting
 /// contexts. The speculation typically succeeds, but if it doesn't we have to lay it out again.
 pub fn guess_float_placement(flow: &mut Flow) {
-    if !flow.base().restyle_damage.intersects(ServoRestyleDamage::REFLOW) {
+    if !flow
+        .base()
+        .restyle_damage
+        .intersects(ServoRestyleDamage::REFLOW)
+    {
         return;
     }
 
     let mut floats_in = SpeculatedFloatPlacement::compute_floats_in_for_first_child(flow);
     for kid in flow.mut_base().child_iter_mut() {
-        if kid.base().flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED) {
+        if kid
+            .base()
+            .flags
+            .contains(FlowFlags::IS_ABSOLUTELY_POSITIONED)
+        {
             // Do not propagate floats in or out, but do propogate between kids.
             guess_float_placement(kid);
         } else {

components/layout/table_caption.rs

@@ -58,7 +58,10 @@ impl Flow for TableCaptionFlow {
     }
 
     fn assign_inline_sizes(&mut self, layout_context: &LayoutContext) {
-        debug!("assign_inline_sizes({}): assigning inline_size for flow", "table_caption");
+        debug!(
+            "assign_inline_sizes({}): assigning inline_size for flow",
+            "table_caption"
+        );
         self.block_flow.assign_inline_sizes(layout_context);
     }
 
@@ -68,15 +71,18 @@ impl Flow for TableCaptionFlow {
     }
 
     fn compute_stacking_relative_position(&mut self, layout_context: &LayoutContext) {
-        self.block_flow.compute_stacking_relative_position(layout_context)
+        self.block_flow
+            .compute_stacking_relative_position(layout_context)
     }
 
     fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
-        self.block_flow.update_late_computed_inline_position_if_necessary(inline_position)
+        self.block_flow
+            .update_late_computed_inline_position_if_necessary(inline_position)
     }
 
     fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
-        self.block_flow.update_late_computed_block_position_if_necessary(block_position)
+        self.block_flow
+            .update_late_computed_block_position_if_necessary(block_position)
     }
 
     fn build_display_list(&mut self, state: &mut DisplayListBuildState) {
@@ -85,8 +91,8 @@ impl Flow for TableCaptionFlow {
     }
 
     fn collect_stacking_contexts(&mut self, state: &mut StackingContextCollectionState) {
-        self.block_flow.collect_stacking_contexts_for_block(state,
-                                                            StackingContextCollectionFlags::empty());
+        self.block_flow
+            .collect_stacking_contexts_for_block(state, StackingContextCollectionFlags::empty());
     }
 
     fn repair_style(&mut self, new_style: &::ServoArc<ComputedValues>) {
@@ -109,11 +115,17 @@ impl Flow for TableCaptionFlow {
         self.block_flow.generated_containing_block_size(flow)
     }
 
-    fn iterate_through_fragment_border_boxes(&self,
-                                             iterator: &mut FragmentBorderBoxIterator,
-                                             level: i32,
-                                             stacking_context_position: &Point2D<Au>) {
-        self.block_flow.iterate_through_fragment_border_boxes(iterator, level, stacking_context_position)
+    fn iterate_through_fragment_border_boxes(
+        &self,
+        iterator: &mut FragmentBorderBoxIterator,
+        level: i32,
+        stacking_context_position: &Point2D<Au>,
+    ) {
+        self.block_flow.iterate_through_fragment_border_boxes(
+            iterator,
+            level,
+            stacking_context_position,
+        )
     }
 
     fn mutate_fragments(&mut self, mutator: &mut FnMut(&mut Fragment)) {

components/layout/table_cell.rs

@@ -63,7 +63,10 @@ impl TableCellFlow {
     }
 
     pub fn from_node_fragment_and_visibility_flag<N: ThreadSafeLayoutNode>(
-            node: &N, fragment: Fragment, visible: bool) -> TableCellFlow {
+        node: &N,
+        fragment: Fragment,
+        visible: bool,
+    ) -> TableCellFlow {
         TableCellFlow {
             block_flow: BlockFlow::from_fragment(fragment),
             collapsed_borders: CollapsedBordersForCell::new(),
@@ -90,7 +93,8 @@ impl TableCellFlow {
         let remaining = self.block_flow.assign_block_size_block_base(
             layout_context,
             None,
-            MarginsMayCollapseFlag::MarginsMayNotCollapse);
+            MarginsMayCollapseFlag::MarginsMayNotCollapse,
+        );
         debug_assert!(remaining.is_none());
     }
 
@@ -102,12 +106,14 @@ impl TableCellFlow {
         for kid in self.base().children.iter() {
             let kid_base = kid.base();
             if kid_base.flags.contains(FlowFlags::IS_ABSOLUTELY_POSITIONED) {
-                continue
+                continue;
             }
-            let start = kid_base.position.start.b -
-                kid_base.collapsible_margins.block_start_margin_for_noncollapsible_context();
-            let end = kid_base.position.start.b + kid_base.position.size.block +
-                kid_base.collapsible_margins.block_end_margin_for_noncollapsible_context();
+            let start = kid_base.position.start.b - kid_base
+                .collapsible_margins
+                .block_start_margin_for_noncollapsible_context();
+            let end = kid_base.position.start.b + kid_base.position.size.block + kid_base
+                .collapsible_margins
+                .block_end_margin_for_noncollapsible_context();
             match extents {
                 Some((ref mut first_start, ref mut last_end)) => {
                     if start < *first_start {
@@ -116,7 +122,7 @@ impl TableCellFlow {
                     if end > *last_end {
                         *last_end = end
                     }
-                }
+                },
                 None => extents = Some((start, end)),
             }
         }
@@ -138,7 +144,7 @@ impl TableCellFlow {
             _ => Au(0),
         };
         if offset == Au(0) {
-            return
+            return;
         }
 
         for kid in self.mut_base().children.iter_mut() {
@@ -154,9 +160,8 @@ impl TableCellFlow {
     // Call after block size calculation
     pub fn total_block_size(&mut self) -> Au {
         // TODO: Percentage block-size
-        let specified = MaybeAuto::from_style(self.fragment().style()
-                                                  .content_block_size(),
-                                              Au(0)).specified_or_zero();
+        let specified = MaybeAuto::from_style(self.fragment().style().content_block_size(), Au(0))
+            .specified_or_zero();
         specified + self.fragment().border_padding.block_start_end()
     }
 }
@@ -185,23 +190,46 @@ impl Flow for TableCellFlow {
     /// Minimum/preferred inline-sizes set by this function are used in automatic table layout
     /// calculation.
     fn bubble_inline_sizes(&mut self) {
-        let _scope = layout_debug_scope!("table_cell::bubble_inline_sizes {:x}",
-                                         self.block_flow.base.debug_id());
+        let _scope = layout_debug_scope!(
+            "table_cell::bubble_inline_sizes {:x}",
+            self.block_flow.base.debug_id()
+        );
 
         self.block_flow.bubble_inline_sizes_for_block(true);
-        let specified_inline_size = MaybeAuto::from_style(self.block_flow
-                                                              .fragment
-                                                              .style()
-                                                              .content_inline_size(),
-                                                          Au(0)).specified_or_zero();
-        if self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size <
-                specified_inline_size {
-            self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size = specified_inline_size
+        let specified_inline_size = MaybeAuto::from_style(
+            self.block_flow.fragment.style().content_inline_size(),
+            Au(0),
+        ).specified_or_zero();
+        if self
+            .block_flow
+            .base
+            .intrinsic_inline_sizes
+            .minimum_inline_size <
+            specified_inline_size
+        {
+            self.block_flow
+                .base
+                .intrinsic_inline_sizes
+                .minimum_inline_size = specified_inline_size
         }
-        if self.block_flow.base.intrinsic_inline_sizes.preferred_inline_size <
-                self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size {
-            self.block_flow.base.intrinsic_inline_sizes.preferred_inline_size =
-                self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size;
+        if self
+            .block_flow
+            .base
+            .intrinsic_inline_sizes
+            .preferred_inline_size <
+            self.block_flow
+                .base
+                .intrinsic_inline_sizes
+                .minimum_inline_size
+        {
+            self.block_flow
+                .base
+                .intrinsic_inline_sizes
+                .preferred_inline_size = self
+                .block_flow
+                .base
+                .intrinsic_inline_sizes
+                .minimum_inline_size;
         }
     }
 
@@ -209,35 +237,42 @@ impl Flow for TableCellFlow {
     /// When called on this context, the context has had its inline-size set by the parent table
     /// row.
     fn assign_inline_sizes(&mut self, layout_context: &LayoutContext) {
-        let _scope = layout_debug_scope!("table_cell::assign_inline_sizes {:x}",
-                                            self.block_flow.base.debug_id());
-        debug!("assign_inline_sizes({}): assigning inline_size for flow", "table_cell");
+        let _scope = layout_debug_scope!(
+            "table_cell::assign_inline_sizes {:x}",
+            self.block_flow.base.debug_id()
+        );
+        debug!(
+            "assign_inline_sizes({}): assigning inline_size for flow",
+            "table_cell"
+        );
 
         let shared_context = layout_context.shared_context();
         // The position was set to the column inline-size by the parent flow, table row flow.
         let containing_block_inline_size = self.block_flow.base.block_container_inline_size;
 
         let inline_size_computer = InternalTable;
-        inline_size_computer.compute_used_inline_size(&mut self.block_flow,
-                                                      shared_context,
-                                                      containing_block_inline_size);
+        inline_size_computer.compute_used_inline_size(
+            &mut self.block_flow,
+            shared_context,
+            containing_block_inline_size,
+        );
 
-        let inline_start_content_edge =
-            self.block_flow.fragment.border_box.start.i +
+        let inline_start_content_edge = self.block_flow.fragment.border_box.start.i +
             self.block_flow.fragment.border_padding.inline_start;
-        let inline_end_content_edge =
-            self.block_flow.base.block_container_inline_size -
+        let inline_end_content_edge = self.block_flow.base.block_container_inline_size -
             self.block_flow.fragment.border_padding.inline_start_end() -
             self.block_flow.fragment.border_box.size.inline;
         let padding_and_borders = self.block_flow.fragment.border_padding.inline_start_end();
         let content_inline_size =
             self.block_flow.fragment.border_box.size.inline - padding_and_borders;
 
-        self.block_flow.propagate_assigned_inline_size_to_children(shared_context,
-                                                                   inline_start_content_edge,
-                                                                   inline_end_content_edge,
-                                                                   content_inline_size,
-                                                                   |_, _, _, _, _, _| {});
+        self.block_flow.propagate_assigned_inline_size_to_children(
+            shared_context,
+            inline_start_content_edge,
+            inline_end_content_edge,
+            content_inline_size,
+            |_, _, _, _, _, _| {},
+        );
     }
 
     fn assign_block_size(&mut self, layout_context: &LayoutContext) {
@@ -246,15 +281,18 @@ impl Flow for TableCellFlow {
     }
 
     fn compute_stacking_relative_position(&mut self, layout_context: &LayoutContext) {
-        self.block_flow.compute_stacking_relative_position(layout_context)
+        self.block_flow
+            .compute_stacking_relative_position(layout_context)
     }
 
     fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
-        self.block_flow.update_late_computed_inline_position_if_necessary(inline_position)
+        self.block_flow
+            .update_late_computed_inline_position_if_necessary(inline_position)
     }
 
     fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
-        self.block_flow.update_late_computed_block_position_if_necessary(block_position)
+        self.block_flow
+            .update_late_computed_block_position_if_necessary(block_position)
     }
 
     fn build_display_list(&mut self, _: &mut DisplayListBuildState) {
@@ -264,12 +302,15 @@ impl Flow for TableCellFlow {
 
         // we skip setting the damage in TableCellStyleInfo::build_display_list()
         // because we only have immutable access
-        self.block_flow.fragment.restyle_damage.remove(ServoRestyleDamage::REPAINT);
+        self.block_flow
+            .fragment
+            .restyle_damage
+            .remove(ServoRestyleDamage::REPAINT);
     }
 
     fn collect_stacking_contexts(&mut self, state: &mut StackingContextCollectionState) {
-        self.block_flow.collect_stacking_contexts_for_block(state,
-                                                            StackingContextCollectionFlags::empty());
+        self.block_flow
+            .collect_stacking_contexts_for_block(state, StackingContextCollectionFlags::empty());
     }
 
     fn repair_style(&mut self, new_style: &::ServoArc<ComputedValues>) {
@@ -292,11 +333,17 @@ impl Flow for TableCellFlow {
         self.block_flow.generated_containing_block_size(flow)
     }
 
-    fn iterate_through_fragment_border_boxes(&self,
-                                             iterator: &mut FragmentBorderBoxIterator,
-                                             level: i32,
-                                             stacking_context_position: &Point2D<Au>) {
-        self.block_flow.iterate_through_fragment_border_boxes(iterator, level, stacking_context_position)
+    fn iterate_through_fragment_border_boxes(
+        &self,
+        iterator: &mut FragmentBorderBoxIterator,
+        level: i32,
+        stacking_context_position: &Point2D<Au>,
+    ) {
+        self.block_flow.iterate_through_fragment_border_boxes(
+            iterator,
+            level,
+            stacking_context_position,
+        )
     }
 
     fn mutate_fragments(&mut self, mutator: &mut FnMut(&mut Fragment)) {
@@ -379,67 +426,74 @@ impl CollapsedBordersForCell {
         }
     }
 
-    pub fn adjust_border_bounds_for_painting(&self,
-                                             border_bounds: &mut Rect<Au>,
-                                             writing_mode: WritingMode) {
+    pub fn adjust_border_bounds_for_painting(
+        &self,
+        border_bounds: &mut Rect<Au>,
+        writing_mode: WritingMode,
+    ) {
         let inline_start_divisor = if self.should_paint_inline_start_border() {
             2
         } else {
             -2
         };
-        let inline_start_offset = self.inline_start_width / 2 + self.inline_start_border.width /
-            inline_start_divisor;
+        let inline_start_offset =
+            self.inline_start_width / 2 + self.inline_start_border.width / inline_start_divisor;
         let inline_end_divisor = if self.should_paint_inline_end_border() {
             2
         } else {
             -2
         };
-        let inline_end_offset = self.inline_end_width / 2 + self.inline_end_border.width /
-            inline_end_divisor;
+        let inline_end_offset =
+            self.inline_end_width / 2 + self.inline_end_border.width / inline_end_divisor;
         let block_start_divisor = if self.should_paint_block_start_border() {
             2
         } else {
             -2
         };
-        let block_start_offset = self.block_start_width / 2 + self.block_start_border.width /
-            block_start_divisor;
+        let block_start_offset =
+            self.block_start_width / 2 + self.block_start_border.width / block_start_divisor;
         let block_end_divisor = if self.should_paint_block_end_border() {
             2
         } else {
             -2
         };
-        let block_end_offset = self.block_end_width / 2 + self.block_end_border.width /
-            block_end_divisor;
+        let block_end_offset =
+            self.block_end_width / 2 + self.block_end_border.width / block_end_divisor;
 
         // FIXME(pcwalton): Get the real container size.
         let mut logical_bounds =
             LogicalRect::from_physical(writing_mode, *border_bounds, Size2D::new(Au(0), Au(0)));
         logical_bounds.start.i = logical_bounds.start.i - inline_start_offset;
         logical_bounds.start.b = logical_bounds.start.b - block_start_offset;
-        logical_bounds.size.inline = logical_bounds.size.inline + inline_start_offset +
-            inline_end_offset;
-        logical_bounds.size.block = logical_bounds.size.block + block_start_offset +
-            block_end_offset;
+        logical_bounds.size.inline =
+            logical_bounds.size.inline + inline_start_offset + inline_end_offset;
+        logical_bounds.size.block =
+            logical_bounds.size.block + block_start_offset + block_end_offset;
         *border_bounds = logical_bounds.to_physical(writing_mode, Size2D::new(Au(0), Au(0)))
     }
 
     pub fn adjust_border_colors_and_styles_for_painting(
-            &self,
-            border_colors: &mut SideOffsets2D<Color>,
-            border_styles: &mut SideOffsets2D<BorderStyle>,
-            writing_mode: WritingMode) {
-        let logical_border_colors = LogicalMargin::new(writing_mode,
-                                                       self.block_start_border.color,
-                                                       self.inline_end_border.color,
-                                                       self.block_end_border.color,
-                                                       self.inline_start_border.color);
+        &self,
+        border_colors: &mut SideOffsets2D<Color>,
+        border_styles: &mut SideOffsets2D<BorderStyle>,
+        writing_mode: WritingMode,
+    ) {
+        let logical_border_colors = LogicalMargin::new(
+            writing_mode,
+            self.block_start_border.color,
+            self.inline_end_border.color,
+            self.block_end_border.color,
+            self.inline_start_border.color,
+        );
         *border_colors = logical_border_colors.to_physical(writing_mode);
 
-        let logical_border_styles = LogicalMargin::new(writing_mode,
-                                                       self.block_start_border.style,
-                                                       self.inline_end_border.style,
-                                                       self.block_end_border.style,
-                                                       self.inline_start_border.style);
+        let logical_border_styles = LogicalMargin::new(
+            writing_mode,
+            self.block_start_border.style,
+            self.inline_end_border.style,
+            self.block_end_border.style,
+            self.inline_start_border.style,
+        );
         *border_styles = logical_border_styles.to_physical(writing_mode);
     }
 }

components/layout/table_colgroup.rs

@@ -43,12 +43,14 @@ impl TableColGroupFlow {
     pub fn from_fragments(fragment: Fragment, fragments: Vec<Fragment>) -> TableColGroupFlow {
         let writing_mode = fragment.style().writing_mode;
         TableColGroupFlow {
-            base: BaseFlow::new(Some(fragment.style()),
-                                writing_mode,
-                                ForceNonfloatedFlag::ForceNonfloated),
+            base: BaseFlow::new(
+                Some(fragment.style()),
+                writing_mode,
+                ForceNonfloatedFlag::ForceNonfloated,
+            ),
             fragment: Some(fragment),
             cols: fragments,
-            inline_sizes: vec!(),
+            inline_sizes: vec![],
         }
     }
 }
@@ -67,8 +69,10 @@ impl Flow for TableColGroupFlow {
     }
 
     fn bubble_inline_sizes(&mut self) {
-        let _scope = layout_debug_scope!("table_colgroup::bubble_inline_sizes {:x}",
-                                            self.base.debug_id());
+        let _scope = layout_debug_scope!(
+            "table_colgroup::bubble_inline_sizes {:x}",
+            self.base.debug_id()
+        );
 
         for fragment in &self.cols {
             // Retrieve the specified value from the appropriate CSS property.
@@ -81,19 +85,17 @@ impl Flow for TableColGroupFlow {
 
     /// Table column inline-sizes are assigned in the table flow and propagated to table row flows
     /// and/or rowgroup flows. Therefore, table colgroup flows do not need to assign inline-sizes.
-    fn assign_inline_sizes(&mut self, _: &LayoutContext) {
-    }
+    fn assign_inline_sizes(&mut self, _: &LayoutContext) {}
 
     /// Table columns do not have block-size.
-    fn assign_block_size(&mut self, _: &LayoutContext) {
-    }
+    fn assign_block_size(&mut self, _: &LayoutContext) {}
 
     fn update_late_computed_inline_position_if_necessary(&mut self, _: Au) {}
 
     fn update_late_computed_block_position_if_necessary(&mut self, _: Au) {}
 
     // Table columns are invisible.
-    fn build_display_list(&mut self, _: &mut DisplayListBuildState) { }
+    fn build_display_list(&mut self, _: &mut DisplayListBuildState) {}
 
     fn collect_stacking_contexts(&mut self, state: &mut StackingContextCollectionState) {
         self.base.stacking_context_id = state.current_stacking_context_id;
@@ -110,10 +112,13 @@ impl Flow for TableColGroupFlow {
         panic!("Table column groups can't be containing blocks!")
     }
 
-    fn iterate_through_fragment_border_boxes(&self,
-                                             _: &mut FragmentBorderBoxIterator,
-                                             _: i32,
-                                             _: &Point2D<Au>) {}
+    fn iterate_through_fragment_border_boxes(
+        &self,
+        _: &mut FragmentBorderBoxIterator,
+        _: i32,
+        _: &Point2D<Au>,
+    ) {
+    }
 
     fn mutate_fragments(&mut self, _: &mut FnMut(&mut Fragment)) {}
 }

components/layout/table_row.rs

@@ -89,7 +89,6 @@ pub struct CellIntrinsicInlineSize {
     pub row_span: u32,
 }
 
-
 impl TableRowFlow {
     pub fn from_fragment(fragment: Fragment) -> TableRowFlow {
         let writing_mode = fragment.style().writing_mode;
@@ -111,14 +110,19 @@ impl TableRowFlow {
     /// TODO(pcwalton): This doesn't handle floats and positioned elements right.
     ///
     /// Returns the block size
-    pub fn compute_block_size_table_row_base<'a>(&'a mut self, layout_context: &LayoutContext,
-                                                 incoming_rowspan_data: &mut Vec<Au>,
-                                                 border_info: &[TableRowSizeData],
-                                                 row_index: usize) -> Au {
-        fn include_sizes_from_previous_rows(col: &mut usize,
-                                            incoming_rowspan: &[u32],
-                                            incoming_rowspan_data: &mut Vec<Au>,
-                                            max_block_size: &mut Au) {
+    pub fn compute_block_size_table_row_base<'a>(
+        &'a mut self,
+        layout_context: &LayoutContext,
+        incoming_rowspan_data: &mut Vec<Au>,
+        border_info: &[TableRowSizeData],
+        row_index: usize,
+    ) -> Au {
+        fn include_sizes_from_previous_rows(
+            col: &mut usize,
+            incoming_rowspan: &[u32],
+            incoming_rowspan_data: &mut Vec<Au>,
+            max_block_size: &mut Au,
+        ) {
             while let Some(span) = incoming_rowspan.get(*col) {
                 if *span == 1 {
                     break;
@@ -141,19 +145,28 @@ impl TableRowFlow {
         // all cells).
         let mut max_block_size = Au(0);
         let thread_id = self.block_flow.base.thread_id;
-        let content_box = self.block_flow.base.position
-            - self.block_flow.fragment.border_padding
-            - self.block_flow.fragment.margin;
+        let content_box = self.block_flow.base.position -
+            self.block_flow.fragment.border_padding -
+            self.block_flow.fragment.margin;
 
         let mut col = 0;
         for kid in self.block_flow.base.child_iter_mut() {
-            include_sizes_from_previous_rows(&mut col, &self.incoming_rowspan,
-                                             incoming_rowspan_data, &mut max_block_size);
+            include_sizes_from_previous_rows(
+                &mut col,
+                &self.incoming_rowspan,
+                incoming_rowspan_data,
+                &mut max_block_size,
+            );
             kid.place_float_if_applicable();
-            debug_assert!(!kid.base().flags.is_float(), "table cells should never float");
-            kid.assign_block_size_for_inorder_child_if_necessary(layout_context,
-                                                                 thread_id,
-                                                                 content_box);
+            debug_assert!(
+                !kid.base().flags.is_float(),
+                "table cells should never float"
+            );
+            kid.assign_block_size_for_inorder_child_if_necessary(
+                layout_context,
+                thread_id,
+                content_box,
+            );
 
             let mut row_span;
             let column_span;
@@ -172,7 +185,8 @@ impl TableRowFlow {
                 if incoming_rowspan_data.len() <= col {
                     incoming_rowspan_data.resize(col + 1, Au(0));
                 }
-                let border_sizes_spanned = get_spanned_border_size(border_info, row_index, &mut row_span);
+                let border_sizes_spanned =
+                    get_spanned_border_size(border_info, row_index, &mut row_span);
 
                 cell_block_size_pressure -= border_sizes_spanned;
 
@@ -186,33 +200,41 @@ impl TableRowFlow {
             max_block_size = max(max_block_size, cell_block_size_pressure);
             col += column_span;
         }
-        include_sizes_from_previous_rows(&mut col, &self.incoming_rowspan, incoming_rowspan_data, &mut max_block_size);
+        include_sizes_from_previous_rows(
+            &mut col,
+            &self.incoming_rowspan,
+            incoming_rowspan_data,
+            &mut max_block_size,
+        );
 
         let mut block_size = max_block_size;
         // TODO: Percentage block-size
-        block_size = match MaybeAuto::from_style(self.block_flow
-                                                     .fragment
-                                                     .style()
-                                                     .content_block_size(),
-                                                 Au(0)) {
+        block_size = match MaybeAuto::from_style(
+            self.block_flow.fragment.style().content_block_size(),
+            Au(0),
+        ) {
             MaybeAuto::Auto => block_size,
             MaybeAuto::Specified(value) => max(value, block_size),
         };
         block_size
     }
 
-    pub fn assign_block_size_to_self_and_children(&mut self, sizes: &[TableRowSizeData], index: usize) {
+    pub fn assign_block_size_to_self_and_children(
+        &mut self,
+        sizes: &[TableRowSizeData],
+        index: usize,
+    ) {
         // Assign the block-size of kid fragments, which is the same value as own block-size.
         let block_size = sizes[index].size;
         for kid in self.block_flow.base.child_iter_mut() {
             let child_table_cell = kid.as_mut_table_cell();
             let block_size = if child_table_cell.row_span != 1 {
                 let mut row_span = child_table_cell.row_span;
-                let border_sizes_spanned =
-                    get_spanned_border_size(sizes, index, &mut row_span);
-                let row_sizes = sizes[index..].iter()
-                                              .take(row_span as usize)
-                                              .fold(Au(0), |accum, r| accum + r.size);
+                let border_sizes_spanned = get_spanned_border_size(sizes, index, &mut row_span);
+                let row_sizes = sizes[index..]
+                    .iter()
+                    .take(row_span as usize)
+                    .fold(Au(0), |accum, r| accum + r.size);
                 row_sizes + border_sizes_spanned
             } else {
                 block_size
@@ -232,17 +254,13 @@ impl TableRowFlow {
 
             // Write in the size of the relative containing block for children. (This
             // information is also needed to handle RTL.)
-            child_table_cell.block_flow.base.early_absolute_position_info =
-                EarlyAbsolutePositionInfo {
-                    relative_containing_block_size: self.block_flow
-                                                        .fragment
-                                                        .content_box()
-                                                        .size,
-                    relative_containing_block_mode: self.block_flow
-                                                        .fragment
-                                                        .style()
-                                                        .writing_mode,
-                };
+            child_table_cell
+                .block_flow
+                .base
+                .early_absolute_position_info = EarlyAbsolutePositionInfo {
+                relative_containing_block_size: self.block_flow.fragment.content_box().size,
+                relative_containing_block_mode: self.block_flow.fragment.style().writing_mode,
+            };
         }
 
         // Assign the block-size of own fragment
@@ -253,22 +271,28 @@ impl TableRowFlow {
     }
 
     pub fn populate_collapsed_border_spacing<'a, I>(
-            &mut self,
-            collapsed_inline_direction_border_widths_for_table: &[Au],
-            collapsed_block_direction_border_widths_for_table: &mut Peekable<I>)
-            where I: Iterator<Item=&'a Au> {
+        &mut self,
+        collapsed_inline_direction_border_widths_for_table: &[Au],
+        collapsed_block_direction_border_widths_for_table: &mut Peekable<I>,
+    ) where
+        I: Iterator<Item = &'a Au>,
+    {
         self.collapsed_border_spacing.inline.clear();
-        self.collapsed_border_spacing
-            .inline
-            .extend(collapsed_inline_direction_border_widths_for_table.into_iter().map(|x| *x));
+        self.collapsed_border_spacing.inline.extend(
+            collapsed_inline_direction_border_widths_for_table
+                .into_iter()
+                .map(|x| *x),
+        );
 
         if let Some(collapsed_block_direction_border_width_for_table) =
-                collapsed_block_direction_border_widths_for_table.next() {
+            collapsed_block_direction_border_widths_for_table.next()
+        {
             self.collapsed_border_spacing.block_start =
                 *collapsed_block_direction_border_width_for_table
         }
         if let Some(collapsed_block_direction_border_width_for_table) =
-                collapsed_block_direction_border_widths_for_table.peek() {
+            collapsed_block_direction_border_widths_for_table.peek()
+        {
             self.collapsed_border_spacing.block_end =
                 **collapsed_block_direction_border_width_for_table
         }
@@ -308,9 +332,10 @@ fn get_spanned_border_size(sizes: &[TableRowSizeData], row_index: usize, row_spa
     if sizes[last_row_idx].rowgroup_id != sizes[row_index].rowgroup_id {
         // XXXManishearth this loop can be avoided by also storing
         // a "last_rowgroup_at" index so we can leapfrog back quickly
-        *row_span = sizes[row_index..last_row_idx + 1].iter()
-                        .position(|s| s.rowgroup_id != sizes[row_index].rowgroup_id)
-                        .unwrap() as u32;
+        *row_span = sizes[row_index..last_row_idx + 1]
+            .iter()
+            .position(|s| s.rowgroup_id != sizes[row_index].rowgroup_id)
+            .unwrap() as u32;
         last_row_idx = row_index + *row_span as usize - 1;
     }
     sizes[last_row_idx].cumulative_border_spacing - sizes[row_index].cumulative_border_spacing
@@ -345,20 +370,26 @@ impl Flow for TableRowFlow {
     /// The specified column inline-sizes of children cells are used in fixed table layout
     /// calculation.
     fn bubble_inline_sizes(&mut self) {
-        let _scope = layout_debug_scope!("table_row::bubble_inline_sizes {:x}",
-                                         self.block_flow.base.debug_id());
+        let _scope = layout_debug_scope!(
+            "table_row::bubble_inline_sizes {:x}",
+            self.block_flow.base.debug_id()
+        );
 
         // Bubble up the specified inline-sizes from child table cells.
         let (mut min_inline_size, mut pref_inline_size) = (Au(0), Au(0));
-        let collapsing_borders = self.block_flow
-                                     .fragment
-                                     .style()
-                                     .get_inherited_table()
-                                     .border_collapse == BorderCollapse::Collapse;
+        let collapsing_borders = self
+            .block_flow
+            .fragment
+            .style()
+            .get_inherited_table()
+            .border_collapse ==
+            BorderCollapse::Collapse;
         let row_style = &*self.block_flow.fragment.style;
-        self.preliminary_collapsed_borders.reset(
-            CollapsedBorder::inline_start(&row_style,
-                                          CollapsedBorderProvenance::FromTableRow));
+        self.preliminary_collapsed_borders
+            .reset(CollapsedBorder::inline_start(
+                &row_style,
+                CollapsedBorderProvenance::FromTableRow,
+            ));
 
         {
             let children_count = self.block_flow.base.children.len();
@@ -373,10 +404,11 @@ impl Flow for TableRowFlow {
                 let child_row_span;
                 {
                     let child_table_cell = kid.as_mut_table_cell();
-                    child_specified_inline_size = child_table_cell.block_flow
-                                                                  .fragment
-                                                                  .style
-                                                                  .content_inline_size();
+                    child_specified_inline_size = child_table_cell
+                        .block_flow
+                        .fragment
+                        .style
+                        .content_inline_size();
                     child_column_span = child_table_cell.column_span;
                     child_row_span = child_table_cell.row_span;
 
@@ -388,7 +420,8 @@ impl Flow for TableRowFlow {
                             i,
                             child_table_cell,
                             &mut iterator,
-                            &mut self.preliminary_collapsed_borders)
+                            &mut self.preliminary_collapsed_borders,
+                        )
                     }
                 }
 
@@ -401,7 +434,7 @@ impl Flow for TableRowFlow {
                         LengthOrPercentageOrAuto::Calc(_) |
                         LengthOrPercentageOrAuto::Percentage(_) => {
                             child_base.intrinsic_inline_sizes.minimum_inline_size
-                        }
+                        },
                         LengthOrPercentageOrAuto::Length(length) => Au::from(length),
                     },
                     percentage: match child_specified_inline_size {
@@ -420,23 +453,34 @@ impl Flow for TableRowFlow {
                 };
                 min_inline_size = min_inline_size + child_column_inline_size.minimum_length;
                 pref_inline_size = pref_inline_size + child_column_inline_size.preferred;
-                self.cell_intrinsic_inline_sizes.push(CellIntrinsicInlineSize {
-                    column_size: child_column_inline_size,
-                    column_span: child_column_span,
-                    row_span: child_row_span,
-                });
+                self.cell_intrinsic_inline_sizes
+                    .push(CellIntrinsicInlineSize {
+                        column_size: child_column_inline_size,
+                        column_span: child_column_span,
+                        row_span: child_row_span,
+                    });
             }
         }
 
-        self.block_flow.base.intrinsic_inline_sizes.minimum_inline_size = min_inline_size;
-        self.block_flow.base.intrinsic_inline_sizes.preferred_inline_size = max(min_inline_size,
-                                                                                pref_inline_size);
+        self.block_flow
+            .base
+            .intrinsic_inline_sizes
+            .minimum_inline_size = min_inline_size;
+        self.block_flow
+            .base
+            .intrinsic_inline_sizes
+            .preferred_inline_size = max(min_inline_size, pref_inline_size);
     }
 
     fn assign_inline_sizes(&mut self, layout_context: &LayoutContext) {
-        let _scope = layout_debug_scope!("table_row::assign_inline_sizes {:x}",
-                                         self.block_flow.base.debug_id());
-        debug!("assign_inline_sizes({}): assigning inline_size for flow", "table_row");
+        let _scope = layout_debug_scope!(
+            "table_row::assign_inline_sizes {:x}",
+            self.block_flow.base.debug_id()
+        );
+        debug!(
+            "assign_inline_sizes({}): assigning inline_size for flow",
+            "table_row"
+        );
 
         let shared_context = layout_context.shared_context();
         // The position was set to the containing block by the flow's parent.
@@ -447,9 +491,11 @@ impl Flow for TableRowFlow {
         let inline_end_content_edge = Au(0);
 
         let inline_size_computer = InternalTable;
-        inline_size_computer.compute_used_inline_size(&mut self.block_flow,
-                                                      shared_context,
-                                                      containing_block_inline_size);
+        inline_size_computer.compute_used_inline_size(
+            &mut self.block_flow,
+            shared_context,
+            containing_block_inline_size,
+        );
 
         // Spread out the completed inline sizes among columns with spans > 1.
         let num_columns = self.column_computed_inline_sizes.len();
@@ -461,26 +507,23 @@ impl Flow for TableRowFlow {
             while col < self.incoming_rowspan.len() && self.incoming_rowspan[col] != 1 {
                 let size = match self.column_computed_inline_sizes.get(col) {
                     Some(column_computed_inline_size) => *column_computed_inline_size,
-                    None => ColumnComputedInlineSize { size: Au(0) } // See FIXME below.
+                    None => ColumnComputedInlineSize { size: Au(0) }, // See FIXME below.
                 };
                 computed_inline_size_for_cells.push(size);
                 col += 1;
             }
             // Start with the computed inline size for the first column in the span.
-            let mut column_computed_inline_size =
-                match self.column_computed_inline_sizes.get(col) {
-                    Some(column_computed_inline_size) => *column_computed_inline_size,
-                    None => {
-                        // We're in fixed layout mode and there are more cells in this row than
-                        // columns we know about. According to CSS 2.1 § 17.5.2.1, the behavior is
-                        // now undefined. So just use zero.
-                        //
-                        // FIXME(pcwalton): $10 says this isn't Web compatible.
-                        ColumnComputedInlineSize {
-                            size: Au(0),
-                        }
-                    }
-                };
+            let mut column_computed_inline_size = match self.column_computed_inline_sizes.get(col) {
+                Some(column_computed_inline_size) => *column_computed_inline_size,
+                None => {
+                    // We're in fixed layout mode and there are more cells in this row than
+                    // columns we know about. According to CSS 2.1 § 17.5.2.1, the behavior is
+                    // now undefined. So just use zero.
+                    //
+                    // FIXME(pcwalton): $10 says this isn't Web compatible.
+                    ColumnComputedInlineSize { size: Au(0) }
+                },
+            };
             col += 1;
 
             // Add in computed inline sizes for any extra columns in the span.
@@ -491,7 +534,8 @@ impl Flow for TableRowFlow {
                         None => break,
                     };
                 column_computed_inline_size.size = column_computed_inline_size.size +
-                    extra_column_computed_inline_size.size + self.spacing.horizontal();
+                    extra_column_computed_inline_size.size +
+                    self.spacing.horizontal();
                 col += 1;
             }
 
@@ -499,16 +543,19 @@ impl Flow for TableRowFlow {
         }
 
         // Set up border collapse info.
-        let border_collapse_info =
-            match self.block_flow.fragment.style().get_inherited_table().border_collapse {
-                BorderCollapse::Collapse => {
-                    Some(BorderCollapseInfoForChildTableCell {
-                        collapsed_borders_for_row: &self.final_collapsed_borders,
-                        collapsed_border_spacing_for_row: &self.collapsed_border_spacing,
-                    })
-                }
-                BorderCollapse::Separate => None,
-            };
+        let border_collapse_info = match self
+            .block_flow
+            .fragment
+            .style()
+            .get_inherited_table()
+            .border_collapse
+        {
+            BorderCollapse::Collapse => Some(BorderCollapseInfoForChildTableCell {
+                collapsed_borders_for_row: &self.final_collapsed_borders,
+                collapsed_border_spacing_for_row: &self.collapsed_border_spacing,
+            }),
+            BorderCollapse::Separate => None,
+        };
 
         // Push those inline sizes down to the cells.
         let spacing = self.spacing;
@@ -517,30 +564,33 @@ impl Flow for TableRowFlow {
         let incoming_rowspan = &self.incoming_rowspan;
         let mut column_index = 0;
 
-        self.block_flow.propagate_assigned_inline_size_to_children(shared_context,
-                                                                   inline_start_content_edge,
-                                                                   inline_end_content_edge,
-                                                                   containing_block_inline_size,
-                                                                   |child_flow,
-                                                                    child_index,
-                                                                    content_inline_size,
-                                                                    _writing_mode,
-                                                                    inline_start_margin_edge,
-                                                                    inline_end_margin_edge| {
-            set_inline_position_of_child_flow(
-                child_flow,
-                child_index,
-                &mut column_index,
-                incoming_rowspan,
-                row_writing_mode,
-                table_writing_mode,
-                &computed_inline_size_for_cells,
-                &spacing,
-                &border_collapse_info,
-                content_inline_size,
-                inline_start_margin_edge,
-                inline_end_margin_edge);
-        })
+        self.block_flow.propagate_assigned_inline_size_to_children(
+            shared_context,
+            inline_start_content_edge,
+            inline_end_content_edge,
+            containing_block_inline_size,
+            |child_flow,
+             child_index,
+             content_inline_size,
+             _writing_mode,
+             inline_start_margin_edge,
+             inline_end_margin_edge| {
+                set_inline_position_of_child_flow(
+                    child_flow,
+                    child_index,
+                    &mut column_index,
+                    incoming_rowspan,
+                    row_writing_mode,
+                    table_writing_mode,
+                    &computed_inline_size_for_cells,
+                    &spacing,
+                    &border_collapse_info,
+                    content_inline_size,
+                    inline_start_margin_edge,
+                    inline_end_margin_edge,
+                );
+            },
+        )
     }
 
     fn assign_block_size(&mut self, _: &LayoutContext) {
@@ -548,15 +598,18 @@ impl Flow for TableRowFlow {
     }
 
     fn compute_stacking_relative_position(&mut self, layout_context: &LayoutContext) {
-        self.block_flow.compute_stacking_relative_position(layout_context)
+        self.block_flow
+            .compute_stacking_relative_position(layout_context)
     }
 
     fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
-        self.block_flow.update_late_computed_inline_position_if_necessary(inline_position)
+        self.block_flow
+            .update_late_computed_inline_position_if_necessary(inline_position)
     }
 
     fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
-        self.block_flow.update_late_computed_block_position_if_necessary(block_position)
+        self.block_flow
+            .update_late_computed_block_position_if_necessary(block_position)
     }
 
     fn build_display_list(&mut self, _: &mut DisplayListBuildState) {
@@ -564,12 +617,15 @@ impl Flow for TableRowFlow {
         // handled in TableCellStyleInfo::build_display_list
         // we skip setting the damage in TableCellStyleInfo::build_display_list()
         // because we only have immutable access
-        self.block_flow.fragment.restyle_damage.remove(ServoRestyleDamage::REPAINT);
+        self.block_flow
+            .fragment
+            .restyle_damage
+            .remove(ServoRestyleDamage::REPAINT);
     }
 
     fn collect_stacking_contexts(&mut self, state: &mut StackingContextCollectionState) {
-        self.block_flow.collect_stacking_contexts_for_block(state,
-                                                            StackingContextCollectionFlags::empty());
+        self.block_flow
+            .collect_stacking_contexts_for_block(state, StackingContextCollectionFlags::empty());
     }
 
     fn repair_style(&mut self, new_style: &::ServoArc<ComputedValues>) {
@@ -592,11 +648,17 @@ impl Flow for TableRowFlow {
         self.block_flow.generated_containing_block_size(flow)
     }
 
-    fn iterate_through_fragment_border_boxes(&self,
-                                             iterator: &mut FragmentBorderBoxIterator,
-                                             level: i32,
-                                             stacking_context_position: &Point2D<Au>) {
-        self.block_flow.iterate_through_fragment_border_boxes(iterator, level, stacking_context_position)
+    fn iterate_through_fragment_border_boxes(
+        &self,
+        iterator: &mut FragmentBorderBoxIterator,
+        level: i32,
+        stacking_context_position: &Point2D<Au>,
+    ) {
+        self.block_flow.iterate_through_fragment_border_boxes(
+            iterator,
+            level,
+            stacking_context_position,
+        )
     }
 
     fn mutate_fragments(&mut self, mutator: &mut FnMut(&mut Fragment)) {
@@ -711,8 +773,7 @@ impl CollapsedBorder {
 
     /// Creates a collapsed border from the block-start border described in the given CSS style
     /// object.
-    fn top(css_style: &ComputedValues, provenance: CollapsedBorderProvenance)
-           -> CollapsedBorder {
+    fn top(css_style: &ComputedValues, provenance: CollapsedBorderProvenance) -> CollapsedBorder {
         CollapsedBorder {
             style: css_style.get_border().border_top_style,
             width: Au::from(css_style.get_border().border_top_width),
@@ -723,8 +784,7 @@ impl CollapsedBorder {
 
     /// Creates a collapsed border style from the right border described in the given CSS style
     /// object.
-    fn right(css_style: &ComputedValues, provenance: CollapsedBorderProvenance)
-             -> CollapsedBorder {
+    fn right(css_style: &ComputedValues, provenance: CollapsedBorderProvenance) -> CollapsedBorder {
         CollapsedBorder {
             style: css_style.get_border().border_right_style,
             width: Au::from(css_style.get_border().border_right_width),
@@ -735,8 +795,10 @@ impl CollapsedBorder {
 
     /// Creates a collapsed border style from the bottom border described in the given CSS style
     /// object.
-    fn bottom(css_style: &ComputedValues, provenance: CollapsedBorderProvenance)
-              -> CollapsedBorder {
+    fn bottom(
+        css_style: &ComputedValues,
+        provenance: CollapsedBorderProvenance,
+    ) -> CollapsedBorder {
         CollapsedBorder {
             style: css_style.get_border().border_bottom_style,
             width: Au::from(css_style.get_border().border_bottom_width),
@@ -747,8 +809,7 @@ impl CollapsedBorder {
 
     /// Creates a collapsed border style from the left border described in the given CSS style
     /// object.
-    fn left(css_style: &ComputedValues, provenance: CollapsedBorderProvenance)
-            -> CollapsedBorder {
+    fn left(css_style: &ComputedValues, provenance: CollapsedBorderProvenance) -> CollapsedBorder {
         CollapsedBorder {
             style: css_style.get_border().border_left_style,
             width: Au::from(css_style.get_border().border_left_width),
@@ -758,10 +819,11 @@ impl CollapsedBorder {
     }
 
     /// Creates a collapsed border style from the given physical side.
-    fn from_side(side: PhysicalSide,
-                 css_style: &ComputedValues,
-                 provenance: CollapsedBorderProvenance)
-                 -> CollapsedBorder {
+    fn from_side(
+        side: PhysicalSide,
+        css_style: &ComputedValues,
+        provenance: CollapsedBorderProvenance,
+    ) -> CollapsedBorder {
         match side {
             PhysicalSide::Top => CollapsedBorder::top(css_style, provenance),
             PhysicalSide::Right => CollapsedBorder::right(css_style, provenance),
@@ -772,56 +834,72 @@ impl CollapsedBorder {
 
     /// Creates a collapsed border style from the inline-start border described in the given CSS
     /// style object.
-    pub fn inline_start(css_style: &ComputedValues, provenance: CollapsedBorderProvenance)
-                        -> CollapsedBorder {
-        CollapsedBorder::from_side(css_style.writing_mode.inline_start_physical_side(),
-                                   css_style,
-                                   provenance)
+    pub fn inline_start(
+        css_style: &ComputedValues,
+        provenance: CollapsedBorderProvenance,
+    ) -> CollapsedBorder {
+        CollapsedBorder::from_side(
+            css_style.writing_mode.inline_start_physical_side(),
+            css_style,
+            provenance,
+        )
     }
 
     /// Creates a collapsed border style from the inline-start border described in the given CSS
     /// style object.
-    pub fn inline_end(css_style: &ComputedValues, provenance: CollapsedBorderProvenance)
-                      -> CollapsedBorder {
-        CollapsedBorder::from_side(css_style.writing_mode.inline_end_physical_side(),
-                                   css_style,
-                                   provenance)
+    pub fn inline_end(
+        css_style: &ComputedValues,
+        provenance: CollapsedBorderProvenance,
+    ) -> CollapsedBorder {
+        CollapsedBorder::from_side(
+            css_style.writing_mode.inline_end_physical_side(),
+            css_style,
+            provenance,
+        )
     }
 
     /// Creates a collapsed border style from the block-start border described in the given CSS
     /// style object.
-    pub fn block_start(css_style: &ComputedValues, provenance: CollapsedBorderProvenance)
-                       -> CollapsedBorder {
-        CollapsedBorder::from_side(css_style.writing_mode.block_start_physical_side(),
-                                   css_style,
-                                   provenance)
+    pub fn block_start(
+        css_style: &ComputedValues,
+        provenance: CollapsedBorderProvenance,
+    ) -> CollapsedBorder {
+        CollapsedBorder::from_side(
+            css_style.writing_mode.block_start_physical_side(),
+            css_style,
+            provenance,
+        )
     }
 
     /// Creates a collapsed border style from the block-end border described in the given CSS style
     /// object.
-    pub fn block_end(css_style: &ComputedValues, provenance: CollapsedBorderProvenance)
-                     -> CollapsedBorder {
-        CollapsedBorder::from_side(css_style.writing_mode.block_end_physical_side(),
-                                   css_style,
-                                   provenance)
+    pub fn block_end(
+        css_style: &ComputedValues,
+        provenance: CollapsedBorderProvenance,
+    ) -> CollapsedBorder {
+        CollapsedBorder::from_side(
+            css_style.writing_mode.block_end_physical_side(),
+            css_style,
+            provenance,
+        )
     }
 
     /// If `other` has a higher priority per CSS 2.1 § 17.6.2.1, replaces `self` with it.
     pub fn combine(&mut self, other: &CollapsedBorder) {
         match (self.style, other.style) {
             // Step 1.
-            (BorderStyle::Hidden, _) => {}
+            (BorderStyle::Hidden, _) => {},
             (_, BorderStyle::Hidden) => *self = *other,
             // Step 2.
             (BorderStyle::None, _) => *self = *other,
-            (_, BorderStyle::None) => {}
+            (_, BorderStyle::None) => {},
             // Step 3.
-            _ if self.width > other.width => {}
+            _ if self.width > other.width => {},
             _ if self.width < other.width => *self = *other,
-            (this_style, other_style) if this_style > other_style => {}
+            (this_style, other_style) if this_style > other_style => {},
             (this_style, other_style) if this_style < other_style => *self = *other,
             // Step 4.
-            _ if (self.provenance as i8) >= other.provenance as i8 => {}
+            _ if (self.provenance as i8) >= other.provenance as i8 => {},
             _ => *self = *other,
         }
     }
@@ -829,11 +907,12 @@ impl CollapsedBorder {
 
 /// Pushes column inline size, incoming rowspan, and border collapse info down to a child.
 pub fn propagate_column_inline_sizes_to_child(
-        child_flow: &mut Flow,
-        table_writing_mode: WritingMode,
-        column_computed_inline_sizes: &[ColumnComputedInlineSize],
-        border_spacing: &BorderSpacing,
-        incoming_rowspan: &mut Vec<u32>) {
+    child_flow: &mut Flow,
+    table_writing_mode: WritingMode,
+    column_computed_inline_sizes: &[ColumnComputedInlineSize],
+    border_spacing: &BorderSpacing,
+    incoming_rowspan: &mut Vec<u32>,
+) {
     // If the child is a row group or a row, the column inline-size and rowspan info should be copied from its
     // parent.
     //
@@ -844,13 +923,15 @@ pub fn propagate_column_inline_sizes_to_child(
             let child_table_rowgroup_flow = child_flow.as_mut_table_rowgroup();
             child_table_rowgroup_flow.spacing = *border_spacing;
             for kid in child_table_rowgroup_flow.block_flow.base.child_iter_mut() {
-                propagate_column_inline_sizes_to_child(kid,
-                                                       table_writing_mode,
-                                                       column_computed_inline_sizes,
-                                                       border_spacing,
-                                                       incoming_rowspan);
+                propagate_column_inline_sizes_to_child(
+                    kid,
+                    table_writing_mode,
+                    column_computed_inline_sizes,
+                    border_spacing,
+                    incoming_rowspan,
+                );
             }
-        }
+        },
         FlowClass::TableRow => {
             let child_table_row_flow = child_flow.as_mut_table_row();
             child_table_row_flow.column_computed_inline_sizes =
@@ -887,27 +968,28 @@ pub fn propagate_column_inline_sizes_to_child(
                     col += 1;
                 }
             }
-        }
-        c => warn!("unexpected flow in table {:?}", c)
+        },
+        c => warn!("unexpected flow in table {:?}", c),
     }
 }
 
 /// Lay out table cells inline according to the computer column sizes.
 fn set_inline_position_of_child_flow(
-        child_flow: &mut Flow,
-        child_index: usize,
-        column_index: &mut usize,
-        incoming_rowspan: &[u32],
-        row_writing_mode: WritingMode,
-        table_writing_mode: WritingMode,
-        column_computed_inline_sizes: &[ColumnComputedInlineSize],
-        border_spacing: &BorderSpacing,
-        border_collapse_info: &Option<BorderCollapseInfoForChildTableCell>,
-        parent_content_inline_size: Au,
-        inline_start_margin_edge: &mut Au,
-        inline_end_margin_edge: &mut Au) {
+    child_flow: &mut Flow,
+    child_index: usize,
+    column_index: &mut usize,
+    incoming_rowspan: &[u32],
+    row_writing_mode: WritingMode,
+    table_writing_mode: WritingMode,
+    column_computed_inline_sizes: &[ColumnComputedInlineSize],
+    border_spacing: &BorderSpacing,
+    border_collapse_info: &Option<BorderCollapseInfoForChildTableCell>,
+    parent_content_inline_size: Au,
+    inline_start_margin_edge: &mut Au,
+    inline_end_margin_edge: &mut Au,
+) {
     if !child_flow.is_table_cell() {
-        return
+        return;
     }
 
     let reverse_column_order = table_writing_mode.is_bidi_ltr() != row_writing_mode.is_bidi_ltr();
@@ -933,33 +1015,42 @@ fn set_inline_position_of_child_flow(
         Some(ref border_collapse_info) => {
             // Write in the child's border collapse state.
             child_table_cell.collapsed_borders = CollapsedBordersForCell {
-                inline_start_border: border_collapse_info.collapsed_borders_for_row
-                                                         .inline
-                                                         .get(child_index)
-                                                         .map_or(CollapsedBorder::new(), |x| *x),
-                inline_end_border: border_collapse_info.collapsed_borders_for_row
-                                                       .inline
-                                                       .get(child_index + 1)
-                                                       .map_or(CollapsedBorder::new(), |x| *x),
-                block_start_border: border_collapse_info.collapsed_borders_for_row
-                                                        .block_start
-                                                        .get(child_index)
-                                                        .map_or(CollapsedBorder::new(), |x| *x),
-                block_end_border: border_collapse_info.collapsed_borders_for_row
-                                                      .block_end
-                                                      .get(child_index)
-                                                      .map_or(CollapsedBorder::new(), |x| *x),
-                inline_start_width: border_collapse_info.collapsed_border_spacing_for_row
-                                                        .inline
-                                                        .get(child_index)
-                                                        .map_or(Au(0), |x| *x),
-                inline_end_width: border_collapse_info.collapsed_border_spacing_for_row
-                                                      .inline
-                                                      .get(child_index + 1)
-                                                      .map_or(Au(0), |x| *x),
-                block_start_width: border_collapse_info.collapsed_border_spacing_for_row
-                                                       .block_start,
-                block_end_width: border_collapse_info.collapsed_border_spacing_for_row.block_end,
+                inline_start_border: border_collapse_info
+                    .collapsed_borders_for_row
+                    .inline
+                    .get(child_index)
+                    .map_or(CollapsedBorder::new(), |x| *x),
+                inline_end_border: border_collapse_info
+                    .collapsed_borders_for_row
+                    .inline
+                    .get(child_index + 1)
+                    .map_or(CollapsedBorder::new(), |x| *x),
+                block_start_border: border_collapse_info
+                    .collapsed_borders_for_row
+                    .block_start
+                    .get(child_index)
+                    .map_or(CollapsedBorder::new(), |x| *x),
+                block_end_border: border_collapse_info
+                    .collapsed_borders_for_row
+                    .block_end
+                    .get(child_index)
+                    .map_or(CollapsedBorder::new(), |x| *x),
+                inline_start_width: border_collapse_info
+                    .collapsed_border_spacing_for_row
+                    .inline
+                    .get(child_index)
+                    .map_or(Au(0), |x| *x),
+                inline_end_width: border_collapse_info
+                    .collapsed_border_spacing_for_row
+                    .inline
+                    .get(child_index + 1)
+                    .map_or(Au(0), |x| *x),
+                block_start_width: border_collapse_info
+                    .collapsed_border_spacing_for_row
+                    .block_start,
+                block_end_width: border_collapse_info
+                    .collapsed_border_spacing_for_row
+                    .block_end,
             };
 
             // Move over past the collapsed border.
@@ -968,7 +1059,7 @@ fn set_inline_position_of_child_flow(
             } else {
                 *inline_start_margin_edge += child_table_cell.collapsed_borders.inline_start_width;
             }
-        }
+        },
         None => {
             // Take spacing into account.
             if reverse_column_order {
@@ -976,7 +1067,7 @@ fn set_inline_position_of_child_flow(
             } else {
                 *inline_start_margin_edge += border_spacing.horizontal();
             }
-        }
+        },
     }
 
     let column_inline_size = column_computed_inline_sizes[*column_index].size;
@@ -1008,51 +1099,68 @@ pub struct BorderCollapseInfoForChildTableCell<'a> {
 /// table row. This is done eagerly here so that at least the inline inside border collapse
 /// computations can be parallelized across all the rows of the table.
 fn perform_inline_direction_border_collapse_for_row(
-        row_style: &ComputedValues,
-        children_count: usize,
-        child_index: usize,
-        child_table_cell: &mut TableCellFlow,
-        iterator: &mut Peekable<Enumerate<MutFlowListIterator>>,
-        preliminary_collapsed_borders: &mut CollapsedBordersForRow) {
+    row_style: &ComputedValues,
+    children_count: usize,
+    child_index: usize,
+    child_table_cell: &mut TableCellFlow,
+    iterator: &mut Peekable<Enumerate<MutFlowListIterator>>,
+    preliminary_collapsed_borders: &mut CollapsedBordersForRow,
+) {
     // In the first cell, combine its border with the one coming from the row.
     if child_index == 0 {
         let first_inline_border = &mut preliminary_collapsed_borders.inline[0];
-        first_inline_border.combine(
-            &CollapsedBorder::inline_start(&*child_table_cell.block_flow.fragment.style,
-                                           CollapsedBorderProvenance::FromNextTableCell));
+        first_inline_border.combine(&CollapsedBorder::inline_start(
+            &*child_table_cell.block_flow.fragment.style,
+            CollapsedBorderProvenance::FromNextTableCell,
+        ));
     }
 
     let inline_collapsed_border = preliminary_collapsed_borders.inline.push_or_set(
         child_index + 1,
-        CollapsedBorder::inline_end(&*child_table_cell.block_flow.fragment.style,
-                                    CollapsedBorderProvenance::FromPreviousTableCell));
+        CollapsedBorder::inline_end(
+            &*child_table_cell.block_flow.fragment.style,
+            CollapsedBorderProvenance::FromPreviousTableCell,
+        ),
+    );
 
     if let Some(&(_, ref next_child_flow)) = iterator.peek() {
         let next_child_flow = next_child_flow.as_block();
-        inline_collapsed_border.combine(
-            &CollapsedBorder::inline_start(&*next_child_flow.fragment.style,
-                                           CollapsedBorderProvenance::FromNextTableCell))
+        inline_collapsed_border.combine(&CollapsedBorder::inline_start(
+            &*next_child_flow.fragment.style,
+            CollapsedBorderProvenance::FromNextTableCell,
+        ))
     };
 
     // In the last cell, also take into account the border that may
     // come from the row.
     if child_index + 1 == children_count {
-        inline_collapsed_border.combine(
-            &CollapsedBorder::inline_end(&row_style,
-                                         CollapsedBorderProvenance::FromTableRow));
+        inline_collapsed_border.combine(&CollapsedBorder::inline_end(
+            &row_style,
+            CollapsedBorderProvenance::FromTableRow,
+        ));
     }
 
-    let mut block_start_border =
-        CollapsedBorder::block_start(&*child_table_cell.block_flow.fragment.style,
-                                     CollapsedBorderProvenance::FromNextTableCell);
-    block_start_border.combine(
-        &CollapsedBorder::block_start(row_style, CollapsedBorderProvenance::FromTableRow));
-    preliminary_collapsed_borders.block_start.push_or_set(child_index, block_start_border);
-    let mut block_end_border =
-        CollapsedBorder::block_end(&*child_table_cell.block_flow.fragment.style,
-                                        CollapsedBorderProvenance::FromPreviousTableCell);
-    block_end_border.combine(
-        &CollapsedBorder::block_end(row_style, CollapsedBorderProvenance::FromTableRow));
+    let mut block_start_border = CollapsedBorder::block_start(
+        &*child_table_cell.block_flow.fragment.style,
+        CollapsedBorderProvenance::FromNextTableCell,
+    );
+    block_start_border.combine(&CollapsedBorder::block_start(
+        row_style,
+        CollapsedBorderProvenance::FromTableRow,
+    ));
+    preliminary_collapsed_borders
+        .block_start
+        .push_or_set(child_index, block_start_border);
+    let mut block_end_border = CollapsedBorder::block_end(
+        &*child_table_cell.block_flow.fragment.style,
+        CollapsedBorderProvenance::FromPreviousTableCell,
+    );
+    block_end_border.combine(&CollapsedBorder::block_end(
+        row_style,
+        CollapsedBorderProvenance::FromTableRow,
+    ));
 
-    preliminary_collapsed_borders.block_end.push_or_set(child_index, block_end_border);
+    preliminary_collapsed_borders
+        .block_end
+        .push_or_set(child_index, block_end_border);
 }

components/layout/table_rowgroup.rs

@@ -66,23 +66,32 @@ impl TableRowGroupFlow {
     }
 
     pub fn populate_collapsed_border_spacing<'a, I>(
-            &mut self,
-            collapsed_inline_direction_border_widths_for_table: &[Au],
-            collapsed_block_direction_border_widths_for_table: &mut Peekable<I>)
-            where I: Iterator<Item=&'a Au> {
-        self.collapsed_inline_direction_border_widths_for_table.clear();
+        &mut self,
+        collapsed_inline_direction_border_widths_for_table: &[Au],
+        collapsed_block_direction_border_widths_for_table: &mut Peekable<I>,
+    ) where
+        I: Iterator<Item = &'a Au>,
+    {
         self.collapsed_inline_direction_border_widths_for_table
-            .extend(collapsed_inline_direction_border_widths_for_table.into_iter().map(|x| *x));
+            .clear();
+        self.collapsed_inline_direction_border_widths_for_table
+            .extend(
+                collapsed_inline_direction_border_widths_for_table
+                    .into_iter()
+                    .map(|x| *x),
+            );
 
         for _ in 0..self.block_flow.base.children.len() {
             if let Some(collapsed_block_direction_border_width_for_table) =
-                    collapsed_block_direction_border_widths_for_table.next() {
+                collapsed_block_direction_border_widths_for_table.next()
+            {
                 self.collapsed_block_direction_border_widths_for_table
                     .push(*collapsed_block_direction_border_width_for_table)
             }
         }
         if let Some(collapsed_block_direction_border_width_for_table) =
-                collapsed_block_direction_border_widths_for_table.peek() {
+            collapsed_block_direction_border_widths_for_table.peek()
+        {
             self.collapsed_block_direction_border_widths_for_table
                 .push(**collapsed_block_direction_border_width_for_table)
         }
@@ -111,8 +120,10 @@ impl Flow for TableRowGroupFlow {
     }
 
     fn bubble_inline_sizes(&mut self) {
-        let _scope = layout_debug_scope!("table_rowgroup::bubble_inline_sizes {:x}",
-                                         self.block_flow.base.debug_id());
+        let _scope = layout_debug_scope!(
+            "table_rowgroup::bubble_inline_sizes {:x}",
+            self.block_flow.base.debug_id()
+        );
         // Proper calculation of intrinsic sizes in table layout requires access to the entire
         // table, which we don't have yet. Defer to our parent.
     }
@@ -120,9 +131,14 @@ impl Flow for TableRowGroupFlow {
     /// Recursively (top-down) determines the actual inline-size of child contexts and fragments.
     /// When called on this context, the context has had its inline-size set by the parent context.
     fn assign_inline_sizes(&mut self, layout_context: &LayoutContext) {
-        let _scope = layout_debug_scope!("table_rowgroup::assign_inline_sizes {:x}",
-                                            self.block_flow.base.debug_id());
-        debug!("assign_inline_sizes({}): assigning inline_size for flow", "table_rowgroup");
+        let _scope = layout_debug_scope!(
+            "table_rowgroup::assign_inline_sizes {:x}",
+            self.block_flow.base.debug_id()
+        );
+        debug!(
+            "assign_inline_sizes({}): assigning inline_size for flow",
+            "table_rowgroup"
+        );
 
         let shared_context = layout_context.shared_context();
         // The position was set to the containing block by the flow's parent.
@@ -130,50 +146,66 @@ impl Flow for TableRowGroupFlow {
         let (inline_start_content_edge, inline_end_content_edge) = (Au(0), Au(0));
         let content_inline_size = containing_block_inline_size;
 
-        let border_collapse = self.block_flow.fragment.style.get_inherited_table().border_collapse;
+        let border_collapse = self
+            .block_flow
+            .fragment
+            .style
+            .get_inherited_table()
+            .border_collapse;
         let inline_size_computer = InternalTable;
-        inline_size_computer.compute_used_inline_size(&mut self.block_flow,
-                                                      shared_context,
-                                                      containing_block_inline_size);
+        inline_size_computer.compute_used_inline_size(
+            &mut self.block_flow,
+            shared_context,
+            containing_block_inline_size,
+        );
 
         let collapsed_inline_direction_border_widths_for_table =
             &self.collapsed_inline_direction_border_widths_for_table;
-        let mut collapsed_block_direction_border_widths_for_table =
-            self.collapsed_block_direction_border_widths_for_table.iter().peekable();
-        self.block_flow.propagate_assigned_inline_size_to_children(shared_context,
-                                                                   inline_start_content_edge,
-                                                                   inline_end_content_edge,
-                                                                   content_inline_size,
-                                                                   |child_flow,
-                                                                    _child_index,
-                                                                    _content_inline_size,
-                                                                    _writing_mode,
-                                                                    _inline_start_margin_edge,
-                                                                    _inline_end_margin_edge| {
-            if border_collapse == border_collapse::T::Collapse {
-                let child_table_row = child_flow.as_mut_table_row();
-                child_table_row.populate_collapsed_border_spacing(
-                    collapsed_inline_direction_border_widths_for_table,
-                    &mut collapsed_block_direction_border_widths_for_table);
-            }
-        });
+        let mut collapsed_block_direction_border_widths_for_table = self
+            .collapsed_block_direction_border_widths_for_table
+            .iter()
+            .peekable();
+        self.block_flow.propagate_assigned_inline_size_to_children(
+            shared_context,
+            inline_start_content_edge,
+            inline_end_content_edge,
+            content_inline_size,
+            |child_flow,
+             _child_index,
+             _content_inline_size,
+             _writing_mode,
+             _inline_start_margin_edge,
+             _inline_end_margin_edge| {
+                if border_collapse == border_collapse::T::Collapse {
+                    let child_table_row = child_flow.as_mut_table_row();
+                    child_table_row.populate_collapsed_border_spacing(
+                        collapsed_inline_direction_border_widths_for_table,
+                        &mut collapsed_block_direction_border_widths_for_table,
+                    );
+                }
+            },
+        );
     }
 
     fn assign_block_size(&mut self, lc: &LayoutContext) {
         debug!("assign_block_size: assigning block_size for table_rowgroup");
-        self.block_flow.assign_block_size_for_table_like_flow(self.spacing.vertical(), lc);
+        self.block_flow
+            .assign_block_size_for_table_like_flow(self.spacing.vertical(), lc);
     }
 
     fn compute_stacking_relative_position(&mut self, layout_context: &LayoutContext) {
-        self.block_flow.compute_stacking_relative_position(layout_context)
+        self.block_flow
+            .compute_stacking_relative_position(layout_context)
     }
 
     fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
-        self.block_flow.update_late_computed_inline_position_if_necessary(inline_position)
+        self.block_flow
+            .update_late_computed_inline_position_if_necessary(inline_position)
     }
 
     fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
-        self.block_flow.update_late_computed_block_position_if_necessary(block_position)
+        self.block_flow
+            .update_late_computed_block_position_if_necessary(block_position)
     }
 
     fn build_display_list(&mut self, _: &mut DisplayListBuildState) {
@@ -181,12 +213,17 @@ impl Flow for TableRowGroupFlow {
 
         // we skip setting the damage in TableCellStyleInfo::build_display_list()
         // because we only have immutable access
-        self.block_flow.fragment.restyle_damage.remove(ServoRestyleDamage::REPAINT);
+        self.block_flow
+            .fragment
+            .restyle_damage
+            .remove(ServoRestyleDamage::REPAINT);
     }
 
     fn collect_stacking_contexts(&mut self, state: &mut StackingContextCollectionState) {
-        self.block_flow.collect_stacking_contexts_for_block(state,
-            StackingContextCollectionFlags::POSITION_NEVER_CREATES_CONTAINING_BLOCK);
+        self.block_flow.collect_stacking_contexts_for_block(
+            state,
+            StackingContextCollectionFlags::POSITION_NEVER_CREATES_CONTAINING_BLOCK,
+        );
     }
 
     fn repair_style(&mut self, new_style: &::ServoArc<ComputedValues>) {
@@ -209,11 +246,17 @@ impl Flow for TableRowGroupFlow {
         self.block_flow.generated_containing_block_size(flow)
     }
 
-    fn iterate_through_fragment_border_boxes(&self,
-                                             iterator: &mut FragmentBorderBoxIterator,
-                                             level: i32,
-                                             stacking_context_position: &Point2D<Au>) {
-        self.block_flow.iterate_through_fragment_border_boxes(iterator, level, stacking_context_position)
+    fn iterate_through_fragment_border_boxes(
+        &self,
+        iterator: &mut FragmentBorderBoxIterator,
+        level: i32,
+        stacking_context_position: &Point2D<Au>,
+    ) {
+        self.block_flow.iterate_through_fragment_border_boxes(
+            iterator,
+            level,
+            stacking_context_position,
+        )
     }
 
     fn mutate_fragments(&mut self, mutator: &mut FnMut(&mut Fragment)) {

components/layout/table_wrapper.rs

@@ -39,7 +39,7 @@ use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize};
 #[derive(Clone, Copy, Debug, Serialize)]
 pub enum TableLayout {
     Fixed,
-    Auto
+    Auto,
 }
 
 #[allow(unsafe_code)]
@@ -63,19 +63,21 @@ impl TableWrapperFlow {
         TableWrapperFlow::from_fragment_and_float_kind(fragment, None)
     }
 
-    pub fn from_fragment_and_float_kind(fragment: Fragment, float_kind: Option<FloatKind>)
-                                        -> TableWrapperFlow {
+    pub fn from_fragment_and_float_kind(
+        fragment: Fragment,
+        float_kind: Option<FloatKind>,
+    ) -> TableWrapperFlow {
         let mut block_flow = BlockFlow::from_fragment_and_float_kind(fragment, float_kind);
-        let table_layout = if block_flow.fragment().style().get_table().table_layout ==
-                              table_layout::T::Fixed {
-            TableLayout::Fixed
-        } else {
-            TableLayout::Auto
-        };
+        let table_layout =
+            if block_flow.fragment().style().get_table().table_layout == table_layout::T::Fixed {
+                TableLayout::Fixed
+            } else {
+                TableLayout::Auto
+            };
         TableWrapperFlow {
             block_flow: block_flow,
-            column_intrinsic_inline_sizes: vec!(),
-            table_layout: table_layout
+            column_intrinsic_inline_sizes: vec![],
+            table_layout: table_layout,
         }
     }
 
@@ -85,9 +87,12 @@ impl TableWrapperFlow {
             if kid.is_table() {
                 let kid_table = kid.as_table();
                 spacing = kid_table.total_horizontal_spacing();
-                table_border_padding =
-                    kid_table.block_flow.fragment.border_padding.inline_start_end();
-                break
+                table_border_padding = kid_table
+                    .block_flow
+                    .fragment
+                    .border_padding
+                    .inline_start_end();
+                break;
             }
         }
         (table_border_padding, spacing)
@@ -103,41 +108,53 @@ impl TableWrapperFlow {
         let available_inline_size = self.block_flow.base.block_container_inline_size;
         for kid in self.block_flow.base.child_iter_mut() {
             if !kid.is_table() {
-                continue
+                continue;
             }
 
             let kid_table = kid.as_mut_table();
             let kid_block_flow = &mut kid_table.block_flow;
-            kid_block_flow.fragment.compute_border_and_padding(available_inline_size);
-            kid_block_flow.fragment.compute_block_direction_margins(available_inline_size);
-            kid_block_flow.fragment.compute_inline_direction_margins(available_inline_size);
-            return
+            kid_block_flow
+                .fragment
+                .compute_border_and_padding(available_inline_size);
+            kid_block_flow
+                .fragment
+                .compute_block_direction_margins(available_inline_size);
+            kid_block_flow
+                .fragment
+                .compute_inline_direction_margins(available_inline_size);
+            return;
         }
     }
 
     /// Calculates table column sizes for automatic layout per INTRINSIC § 4.3.
     fn calculate_table_column_sizes_for_automatic_layout(
-            &mut self,
-            intermediate_column_inline_sizes: &mut [IntermediateColumnInlineSize]) {
+        &mut self,
+        intermediate_column_inline_sizes: &mut [IntermediateColumnInlineSize],
+    ) {
         let available_inline_size = self.available_inline_size();
 
         // Compute all the guesses for the column sizes, and sum them.
         let mut total_guess = AutoLayoutCandidateGuess::new();
-        let guesses: Vec<AutoLayoutCandidateGuess> =
-            self.column_intrinsic_inline_sizes.iter().map(|column_intrinsic_inline_size| {
+        let guesses: Vec<AutoLayoutCandidateGuess> = self
+            .column_intrinsic_inline_sizes
+            .iter()
+            .map(|column_intrinsic_inline_size| {
                 let guess = AutoLayoutCandidateGuess::from_column_intrinsic_inline_size(
                     column_intrinsic_inline_size,
-                    available_inline_size);
+                    available_inline_size,
+                );
                 total_guess = &total_guess + &guess;
                 guess
             }).collect();
 
         // Assign inline sizes.
-        let selection = SelectedAutoLayoutCandidateGuess::select(&total_guess,
-                                                                 available_inline_size);
+        let selection =
+            SelectedAutoLayoutCandidateGuess::select(&total_guess, available_inline_size);
         let mut total_used_inline_size = Au(0);
-        for (intermediate_column_inline_size, guess) in
-                intermediate_column_inline_sizes.iter_mut().zip(guesses.iter()) {
+        for (intermediate_column_inline_size, guess) in intermediate_column_inline_sizes
+            .iter_mut()
+            .zip(guesses.iter())
+        {
             intermediate_column_inline_size.size = guess.calculate(selection);
             intermediate_column_inline_size.percentage = 0.0;
             total_used_inline_size = total_used_inline_size + intermediate_column_inline_size.size
@@ -147,8 +164,10 @@ impl TableWrapperFlow {
         //
         // FIXME(pcwalton, spec): How do I deal with fractional excess?
         let excess_inline_size = available_inline_size - total_used_inline_size;
-        if excess_inline_size > Au(0) && selection ==
-                SelectedAutoLayoutCandidateGuess::UsePreferredGuessAndDistributeExcessInlineSize {
+        if excess_inline_size > Au(0) &&
+            selection ==
+                SelectedAutoLayoutCandidateGuess::UsePreferredGuessAndDistributeExcessInlineSize
+        {
             let mut info = ExcessInlineSizeDistributionInfo::new();
             for column_intrinsic_inline_size in &self.column_intrinsic_inline_sizes {
                 info.update(column_intrinsic_inline_size)
@@ -156,13 +175,16 @@ impl TableWrapperFlow {
 
             let mut total_distributed_excess_size = Au(0);
             for (intermediate_column_inline_size, column_intrinsic_inline_size) in
-                    intermediate_column_inline_sizes.iter_mut()
-                                                    .zip(self.column_intrinsic_inline_sizes
-                                                             .iter()) {
-                info.distribute_excess_inline_size_to_column(intermediate_column_inline_size,
-                                                             column_intrinsic_inline_size,
-                                                             excess_inline_size,
-                                                             &mut total_distributed_excess_size)
+                intermediate_column_inline_sizes
+                    .iter_mut()
+                    .zip(self.column_intrinsic_inline_sizes.iter())
+            {
+                info.distribute_excess_inline_size_to_column(
+                    intermediate_column_inline_size,
+                    column_intrinsic_inline_size,
+                    excess_inline_size,
+                    &mut total_distributed_excess_size,
+                )
             }
             total_used_inline_size = available_inline_size
         }
@@ -179,9 +201,10 @@ impl TableWrapperFlow {
         // just use the shrink-to-fit inline size.
         let available_inline_size = match self.block_flow.fragment.style().content_inline_size() {
             LengthOrPercentageOrAuto::Auto => {
-                self.block_flow.get_shrink_to_fit_inline_size(available_inline_size) -
+                self.block_flow
+                    .get_shrink_to_fit_inline_size(available_inline_size) -
                     table_border_padding
-            }
+            },
             // FIXME(mttr): This fixes #4421 without breaking our current reftests, but I'm not
             // completely sure this is "correct".
             //
@@ -196,10 +219,12 @@ impl TableWrapperFlow {
 
     fn set_inline_size(&mut self, total_used_inline_size: Au) {
         let (table_border_padding, spacing) = self.border_padding_and_spacing();
-        self.block_flow.fragment.border_box.size.inline = total_used_inline_size +
-            table_border_padding + spacing;
+        self.block_flow.fragment.border_box.size.inline =
+            total_used_inline_size + table_border_padding + spacing;
         self.block_flow.base.position.size.inline = total_used_inline_size +
-            table_border_padding + spacing + self.block_flow.fragment.margin.inline_start_end();
+            table_border_padding +
+            spacing +
+            self.block_flow.fragment.margin.inline_start_end();
 
         let writing_mode = self.block_flow.base.writing_mode;
         let container_mode = self.block_flow.base.block_container_writing_mode;
@@ -209,29 +234,30 @@ impl TableWrapperFlow {
             // depends on `border_box.size.inline`.
             self.block_flow.fragment.border_box.start.i =
                 self.block_flow.base.block_container_inline_size -
-                self.block_flow.fragment.margin.inline_end -
-                self.block_flow.fragment.border_box.size.inline;
+                    self.block_flow.fragment.margin.inline_end -
+                    self.block_flow.fragment.border_box.size.inline;
         }
     }
 
     fn compute_used_inline_size(
-            &mut self,
-            shared_context: &SharedStyleContext,
-            parent_flow_inline_size: Au,
-            intermediate_column_inline_sizes: &[IntermediateColumnInlineSize]) {
+        &mut self,
+        shared_context: &SharedStyleContext,
+        parent_flow_inline_size: Au,
+        intermediate_column_inline_sizes: &[IntermediateColumnInlineSize],
+    ) {
         let (border_padding, spacing) = self.border_padding_and_spacing();
-        let minimum_width_of_all_columns =
-            intermediate_column_inline_sizes.iter()
-                                            .fold(border_padding + spacing,
-                                                  |accumulator, intermediate_column_inline_sizes| {
+        let minimum_width_of_all_columns = intermediate_column_inline_sizes.iter().fold(
+            border_padding + spacing,
+            |accumulator, intermediate_column_inline_sizes| {
                 accumulator + intermediate_column_inline_sizes.size
-            });
-        let preferred_width_of_all_columns =
-            self.column_intrinsic_inline_sizes.iter()
-                                              .fold(border_padding + spacing,
-                                                    |accumulator, column_intrinsic_inline_sizes| {
+            },
+        );
+        let preferred_width_of_all_columns = self.column_intrinsic_inline_sizes.iter().fold(
+            border_padding + spacing,
+            |accumulator, column_intrinsic_inline_sizes| {
                 accumulator + column_intrinsic_inline_sizes.preferred
-            });
+            },
+        );
 
         // Delegate to the appropriate inline size computer to find the constraint inputs and write
         // the constraint solutions in.
@@ -241,38 +267,45 @@ impl TableWrapperFlow {
                 preferred_width_of_all_columns: preferred_width_of_all_columns,
                 table_border_padding: border_padding,
             };
-            let input =
-                inline_size_computer.compute_inline_size_constraint_inputs(&mut self.block_flow,
-                                                                           parent_flow_inline_size,
-                                                                           shared_context);
+            let input = inline_size_computer.compute_inline_size_constraint_inputs(
+                &mut self.block_flow,
+                parent_flow_inline_size,
+                shared_context,
+            );
 
-            let solution = inline_size_computer.solve_inline_size_constraints(&mut self.block_flow,
-                                                                              &input);
-            inline_size_computer.set_inline_size_constraint_solutions(&mut self.block_flow,
-                                                                      solution);
-            inline_size_computer.set_inline_position_of_flow_if_necessary(&mut self.block_flow,
-                                                                          solution);
-            return
+            let solution =
+                inline_size_computer.solve_inline_size_constraints(&mut self.block_flow, &input);
+            inline_size_computer
+                .set_inline_size_constraint_solutions(&mut self.block_flow, solution);
+            inline_size_computer
+                .set_inline_position_of_flow_if_necessary(&mut self.block_flow, solution);
+            return;
         }
 
-        if !self.block_flow.base.flags.contains(FlowFlags::INLINE_POSITION_IS_STATIC) {
+        if !self
+            .block_flow
+            .base
+            .flags
+            .contains(FlowFlags::INLINE_POSITION_IS_STATIC)
+        {
             let inline_size_computer = AbsoluteTable {
                 minimum_width_of_all_columns: minimum_width_of_all_columns,
                 preferred_width_of_all_columns: preferred_width_of_all_columns,
                 table_border_padding: border_padding,
             };
-            let input =
-                inline_size_computer.compute_inline_size_constraint_inputs(&mut self.block_flow,
-                                                                           parent_flow_inline_size,
-                                                                           shared_context);
+            let input = inline_size_computer.compute_inline_size_constraint_inputs(
+                &mut self.block_flow,
+                parent_flow_inline_size,
+                shared_context,
+            );
 
-            let solution = inline_size_computer.solve_inline_size_constraints(&mut self.block_flow,
-                                                                              &input);
-            inline_size_computer.set_inline_size_constraint_solutions(&mut self.block_flow,
-                                                                      solution);
-            inline_size_computer.set_inline_position_of_flow_if_necessary(&mut self.block_flow,
-                                                                          solution);
-            return
+            let solution =
+                inline_size_computer.solve_inline_size_constraints(&mut self.block_flow, &input);
+            inline_size_computer
+                .set_inline_size_constraint_solutions(&mut self.block_flow, solution);
+            inline_size_computer
+                .set_inline_position_of_flow_if_necessary(&mut self.block_flow, solution);
+            return;
         }
 
         let inline_size_computer = Table {
@@ -280,16 +313,17 @@ impl TableWrapperFlow {
             preferred_width_of_all_columns: preferred_width_of_all_columns,
             table_border_padding: border_padding,
         };
-        let input =
-            inline_size_computer.compute_inline_size_constraint_inputs(&mut self.block_flow,
-                                                                       parent_flow_inline_size,
-                                                                       shared_context);
+        let input = inline_size_computer.compute_inline_size_constraint_inputs(
+            &mut self.block_flow,
+            parent_flow_inline_size,
+            shared_context,
+        );
 
-        let solution = inline_size_computer.solve_inline_size_constraints(&mut self.block_flow,
-                                                                          &input);
+        let solution =
+            inline_size_computer.solve_inline_size_constraints(&mut self.block_flow, &input);
         inline_size_computer.set_inline_size_constraint_solutions(&mut self.block_flow, solution);
-        inline_size_computer.set_inline_position_of_flow_if_necessary(&mut self.block_flow,
-                                                                      solution);
+        inline_size_computer
+            .set_inline_position_of_flow_if_necessary(&mut self.block_flow, solution);
     }
 }
 
@@ -332,90 +366,96 @@ impl Flow for TableWrapperFlow {
     }
 
     fn assign_inline_sizes(&mut self, layout_context: &LayoutContext) {
-        debug!("assign_inline_sizes({}): assigning inline_size for flow",
-               if self.block_flow.base.flags.is_float() {
-                   "floated table_wrapper"
-               } else {
-                   "table_wrapper"
-               });
+        debug!(
+            "assign_inline_sizes({}): assigning inline_size for flow",
+            if self.block_flow.base.flags.is_float() {
+                "floated table_wrapper"
+            } else {
+                "table_wrapper"
+            }
+        );
 
         let shared_context = layout_context.shared_context();
-        self.block_flow.initialize_container_size_for_root(shared_context);
+        self.block_flow
+            .initialize_container_size_for_root(shared_context);
 
-        let mut intermediate_column_inline_sizes = self.column_intrinsic_inline_sizes
-                                                       .iter()
-                                                       .map(|column_intrinsic_inline_size| {
-            IntermediateColumnInlineSize {
-                size: column_intrinsic_inline_size.minimum_length,
-                percentage: column_intrinsic_inline_size.percentage,
-            }
-        }).collect::<Vec<_>>();
+        let mut intermediate_column_inline_sizes = self
+            .column_intrinsic_inline_sizes
+            .iter()
+            .map(
+                |column_intrinsic_inline_size| IntermediateColumnInlineSize {
+                    size: column_intrinsic_inline_size.minimum_length,
+                    percentage: column_intrinsic_inline_size.percentage,
+                },
+            ).collect::<Vec<_>>();
 
         // Our inline-size was set to the inline-size of the containing block by the flow's parent.
         // Now compute the real value.
         let containing_block_inline_size = self.block_flow.base.block_container_inline_size;
         if self.block_flow.base.flags.is_float() {
-            self.block_flow.float.as_mut().unwrap().containing_inline_size =
-                containing_block_inline_size;
+            self.block_flow
+                .float
+                .as_mut()
+                .unwrap()
+                .containing_inline_size = containing_block_inline_size;
         }
 
         // This has to be done before computing our inline size because `compute_used_inline_size`
         // internally consults the border and padding of the table.
         self.compute_border_and_padding_of_table();
 
-        self.compute_used_inline_size(shared_context,
-                                      containing_block_inline_size,
-                                      &intermediate_column_inline_sizes);
+        self.compute_used_inline_size(
+            shared_context,
+            containing_block_inline_size,
+            &intermediate_column_inline_sizes,
+        );
 
         match self.table_layout {
-            TableLayout::Auto => {
-                self.calculate_table_column_sizes_for_automatic_layout(
-                    &mut intermediate_column_inline_sizes)
-            }
-            TableLayout::Fixed => {}
+            TableLayout::Auto => self.calculate_table_column_sizes_for_automatic_layout(
+                &mut intermediate_column_inline_sizes,
+            ),
+            TableLayout::Fixed => {},
         }
 
         let inline_start_content_edge = self.block_flow.fragment.border_box.start.i;
         let content_inline_size = self.block_flow.fragment.border_box.size.inline;
         let inline_end_content_edge = self.block_flow.fragment.border_padding.inline_end +
-                                      self.block_flow.fragment.margin.inline_end;
+            self.block_flow.fragment.margin.inline_end;
 
         // In case of fixed layout, column inline-sizes are calculated in table flow.
         let assigned_column_inline_sizes = match self.table_layout {
             TableLayout::Fixed => None,
-            TableLayout::Auto => {
-                Some(intermediate_column_inline_sizes.iter().map(|sizes| {
-                    ColumnComputedInlineSize {
-                        size: sizes.size,
-                    }
-                }).collect::<Vec<_>>())
-            }
+            TableLayout::Auto => Some(
+                intermediate_column_inline_sizes
+                    .iter()
+                    .map(|sizes| ColumnComputedInlineSize { size: sizes.size })
+                    .collect::<Vec<_>>(),
+            ),
         };
 
         match assigned_column_inline_sizes {
-            None => {
-                self.block_flow
-                    .propagate_assigned_inline_size_to_children(shared_context,
-                                                                inline_start_content_edge,
-                                                                inline_end_content_edge,
-                                                                content_inline_size,
-                                                                |_, _, _, _, _, _| {})
-            }
+            None => self.block_flow.propagate_assigned_inline_size_to_children(
+                shared_context,
+                inline_start_content_edge,
+                inline_end_content_edge,
+                content_inline_size,
+                |_, _, _, _, _, _| {},
+            ),
             Some(ref assigned_column_inline_sizes) => {
-                self.block_flow
-                    .propagate_assigned_inline_size_to_children(shared_context,
-                                                                inline_start_content_edge,
-                                                                inline_end_content_edge,
-                                                                content_inline_size,
-                                                                |child_flow, _, _, _, _, _| {
-                    if child_flow.class() == FlowClass::Table {
-                        child_flow.as_mut_table().column_computed_inline_sizes =
-                            assigned_column_inline_sizes.to_vec();
-                    }
-                })
-            }
+                self.block_flow.propagate_assigned_inline_size_to_children(
+                    shared_context,
+                    inline_start_content_edge,
+                    inline_end_content_edge,
+                    content_inline_size,
+                    |child_flow, _, _, _, _, _| {
+                        if child_flow.class() == FlowClass::Table {
+                            child_flow.as_mut_table().column_computed_inline_sizes =
+                                assigned_column_inline_sizes.to_vec();
+                        }
+                    },
+                )
+            },
         }
-
     }
 
     fn assign_block_size(&mut self, layout_context: &LayoutContext) {
@@ -423,34 +463,42 @@ impl Flow for TableWrapperFlow {
         let remaining = self.block_flow.assign_block_size_block_base(
             layout_context,
             None,
-            MarginsMayCollapseFlag::MarginsMayNotCollapse);
+            MarginsMayCollapseFlag::MarginsMayNotCollapse,
+        );
         debug_assert!(remaining.is_none());
     }
 
     fn compute_stacking_relative_position(&mut self, layout_context: &LayoutContext) {
-        self.block_flow.compute_stacking_relative_position(layout_context)
+        self.block_flow
+            .compute_stacking_relative_position(layout_context)
     }
 
     fn place_float_if_applicable<'a>(&mut self) {
         self.block_flow.place_float_if_applicable()
     }
 
-    fn assign_block_size_for_inorder_child_if_necessary(&mut self,
-                                                        layout_context: &LayoutContext,
-                                                        parent_thread_id: u8,
-                                                        content_box: LogicalRect<Au>)
-                                                        -> bool {
-        self.block_flow.assign_block_size_for_inorder_child_if_necessary(layout_context,
-                                                                         parent_thread_id,
-                                                                         content_box)
+    fn assign_block_size_for_inorder_child_if_necessary(
+        &mut self,
+        layout_context: &LayoutContext,
+        parent_thread_id: u8,
+        content_box: LogicalRect<Au>,
+    ) -> bool {
+        self.block_flow
+            .assign_block_size_for_inorder_child_if_necessary(
+                layout_context,
+                parent_thread_id,
+                content_box,
+            )
     }
 
     fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
-        self.block_flow.update_late_computed_inline_position_if_necessary(inline_position)
+        self.block_flow
+            .update_late_computed_inline_position_if_necessary(inline_position)
     }
 
     fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
-        self.block_flow.update_late_computed_block_position_if_necessary(block_position)
+        self.block_flow
+            .update_late_computed_block_position_if_necessary(block_position)
     }
 
     fn generated_containing_block_size(&self, flow: OpaqueFlow) -> LogicalSize<Au> {
@@ -465,7 +513,8 @@ impl Flow for TableWrapperFlow {
         self.block_flow.collect_stacking_contexts_for_block(
             state,
             StackingContextCollectionFlags::POSITION_NEVER_CREATES_CONTAINING_BLOCK |
-            StackingContextCollectionFlags::NEVER_CREATES_CLIP_SCROLL_NODE);
+                StackingContextCollectionFlags::NEVER_CREATES_CLIP_SCROLL_NODE,
+        );
     }
 
     fn repair_style(&mut self, new_style: &::ServoArc<ComputedValues>) {
@@ -476,11 +525,17 @@ impl Flow for TableWrapperFlow {
         self.block_flow.compute_overflow()
     }
 
-    fn iterate_through_fragment_border_boxes(&self,
-                                             iterator: &mut FragmentBorderBoxIterator,
-                                             level: i32,
-                                             stacking_context_position: &Point2D<Au>) {
-        self.block_flow.iterate_through_fragment_border_boxes(iterator, level, stacking_context_position)
+    fn iterate_through_fragment_border_boxes(
+        &self,
+        iterator: &mut FragmentBorderBoxIterator,
+        level: i32,
+        stacking_context_position: &Point2D<Au>,
+    ) {
+        self.block_flow.iterate_through_fragment_border_boxes(
+            iterator,
+            level,
+            stacking_context_position,
+        )
     }
 
     fn mutate_fragments(&mut self, mutator: &mut FnMut(&mut Fragment)) {
@@ -550,12 +605,14 @@ impl AutoLayoutCandidateGuess {
     }
 
     /// Fills in the inline-size guesses for this column per INTRINSIC § 4.3.
-    fn from_column_intrinsic_inline_size(column_intrinsic_inline_size: &ColumnIntrinsicInlineSize,
-                                         assignable_inline_size: Au)
-                                         -> AutoLayoutCandidateGuess {
-        let minimum_percentage_guess =
-            max(assignable_inline_size.scale_by(column_intrinsic_inline_size.percentage),
-                column_intrinsic_inline_size.minimum_length);
+    fn from_column_intrinsic_inline_size(
+        column_intrinsic_inline_size: &ColumnIntrinsicInlineSize,
+        assignable_inline_size: Au,
+    ) -> AutoLayoutCandidateGuess {
+        let minimum_percentage_guess = max(
+            assignable_inline_size.scale_by(column_intrinsic_inline_size.percentage),
+            column_intrinsic_inline_size.minimum_length,
+        );
         AutoLayoutCandidateGuess {
             minimum_guess: column_intrinsic_inline_size.minimum_length,
             minimum_percentage_guess: minimum_percentage_guess,
@@ -607,8 +664,8 @@ impl<'a> Add for &'a AutoLayoutCandidateGuess {
     fn add(self, other: &AutoLayoutCandidateGuess) -> AutoLayoutCandidateGuess {
         AutoLayoutCandidateGuess {
             minimum_guess: self.minimum_guess + other.minimum_guess,
-            minimum_percentage_guess:
-                self.minimum_percentage_guess + other.minimum_percentage_guess,
+            minimum_percentage_guess: self.minimum_percentage_guess +
+                other.minimum_percentage_guess,
             minimum_specified_guess: self.minimum_specified_guess + other.minimum_specified_guess,
             preferred_guess: self.preferred_guess + other.preferred_guess,
         }
@@ -631,24 +688,32 @@ impl SelectedAutoLayoutCandidateGuess {
     ///
     /// FIXME(pcwalton, INTRINSIC spec): INTRINSIC doesn't specify whether these are exclusive or
     /// inclusive ranges.
-    fn select(guess: &AutoLayoutCandidateGuess, assignable_inline_size: Au)
-              -> SelectedAutoLayoutCandidateGuess {
+    fn select(
+        guess: &AutoLayoutCandidateGuess,
+        assignable_inline_size: Au,
+    ) -> SelectedAutoLayoutCandidateGuess {
         if assignable_inline_size < guess.minimum_guess {
             SelectedAutoLayoutCandidateGuess::UseMinimumGuess
         } else if assignable_inline_size < guess.minimum_percentage_guess {
-            let weight = weight(guess.minimum_guess,
-                                assignable_inline_size,
-                                guess.minimum_percentage_guess);
+            let weight = weight(
+                guess.minimum_guess,
+                assignable_inline_size,
+                guess.minimum_percentage_guess,
+            );
             SelectedAutoLayoutCandidateGuess::InterpolateBetweenMinimumGuessAndMinimumPercentageGuess(weight)
         } else if assignable_inline_size < guess.minimum_specified_guess {
-            let weight = weight(guess.minimum_percentage_guess,
-                                assignable_inline_size,
-                                guess.minimum_specified_guess);
+            let weight = weight(
+                guess.minimum_percentage_guess,
+                assignable_inline_size,
+                guess.minimum_specified_guess,
+            );
             SelectedAutoLayoutCandidateGuess::InterpolateBetweenMinimumPercentageGuessAndMinimumSpecifiedGuess(weight)
         } else if assignable_inline_size < guess.preferred_guess {
-            let weight = weight(guess.minimum_specified_guess,
-                                assignable_inline_size,
-                                guess.preferred_guess);
+            let weight = weight(
+                guess.minimum_specified_guess,
+                assignable_inline_size,
+                guess.preferred_guess,
+            );
             SelectedAutoLayoutCandidateGuess::InterpolateBetweenMinimumSpecifiedGuessAndPreferredGuess(weight)
         } else {
             SelectedAutoLayoutCandidateGuess::UsePreferredGuessAndDistributeExcessInlineSize
@@ -688,17 +753,19 @@ impl ExcessInlineSizeDistributionInfo {
 
     fn update(&mut self, column_intrinsic_inline_size: &ColumnIntrinsicInlineSize) {
         if !column_intrinsic_inline_size.constrained &&
-                column_intrinsic_inline_size.percentage == 0.0 {
+            column_intrinsic_inline_size.percentage == 0.0
+        {
             self.preferred_inline_size_of_nonconstrained_columns_with_no_percentage =
                 self.preferred_inline_size_of_nonconstrained_columns_with_no_percentage +
-                column_intrinsic_inline_size.preferred;
+                    column_intrinsic_inline_size.preferred;
             self.count_of_nonconstrained_columns_with_no_percentage += 1
         }
         if column_intrinsic_inline_size.constrained &&
-                column_intrinsic_inline_size.percentage == 0.0 {
+            column_intrinsic_inline_size.percentage == 0.0
+        {
             self.preferred_inline_size_of_constrained_columns_with_no_percentage =
                 self.preferred_inline_size_of_constrained_columns_with_no_percentage +
-                column_intrinsic_inline_size.preferred
+                    column_intrinsic_inline_size.preferred
         }
         self.total_percentage += column_intrinsic_inline_size.percentage;
         self.column_count += 1
@@ -710,30 +777,32 @@ impl ExcessInlineSizeDistributionInfo {
     /// `#[inline]` so the compiler will hoist out the branch, which is loop-invariant.
     #[inline]
     fn distribute_excess_inline_size_to_column(
-            &self,
-            intermediate_column_inline_size: &mut IntermediateColumnInlineSize,
-            column_intrinsic_inline_size: &ColumnIntrinsicInlineSize,
-            excess_inline_size: Au,
-            total_distributed_excess_size: &mut Au) {
+        &self,
+        intermediate_column_inline_size: &mut IntermediateColumnInlineSize,
+        column_intrinsic_inline_size: &ColumnIntrinsicInlineSize,
+        excess_inline_size: Au,
+        total_distributed_excess_size: &mut Au,
+    ) {
         let proportion =
             if self.preferred_inline_size_of_nonconstrained_columns_with_no_percentage > Au(0) {
                 // FIXME(spec, pcwalton): Gecko and WebKit do *something* here when there are
                 // nonconstrained columns with no percentage *and* no preferred width. What do they
                 // do?
                 if !column_intrinsic_inline_size.constrained &&
-                        column_intrinsic_inline_size.percentage == 0.0 {
-                    column_intrinsic_inline_size.preferred.to_f32_px() /
-                        self.preferred_inline_size_of_nonconstrained_columns_with_no_percentage
-                            .to_f32_px()
+                    column_intrinsic_inline_size.percentage == 0.0
+                {
+                    column_intrinsic_inline_size.preferred.to_f32_px() / self
+                        .preferred_inline_size_of_nonconstrained_columns_with_no_percentage
+                        .to_f32_px()
                 } else {
                     0.0
                 }
             } else if self.count_of_nonconstrained_columns_with_no_percentage > 0 {
                 1.0 / (self.count_of_nonconstrained_columns_with_no_percentage as CSSFloat)
-            } else if self.preferred_inline_size_of_constrained_columns_with_no_percentage >
-                    Au(0) {
-                column_intrinsic_inline_size.preferred.to_f32_px() /
-                    self.preferred_inline_size_of_constrained_columns_with_no_percentage.to_f32_px()
+            } else if self.preferred_inline_size_of_constrained_columns_with_no_percentage > Au(0) {
+                column_intrinsic_inline_size.preferred.to_f32_px() / self
+                    .preferred_inline_size_of_constrained_columns_with_no_percentage
+                    .to_f32_px()
             } else if self.total_percentage > 0.0 {
                 column_intrinsic_inline_size.percentage / self.total_percentage
             } else {
@@ -742,11 +811,13 @@ impl ExcessInlineSizeDistributionInfo {
 
         // The `min` here has the effect of throwing away fractional excess at the end of the
         // table.
-        let amount_to_distribute = min(excess_inline_size.scale_by(proportion),
-                                       excess_inline_size - *total_distributed_excess_size);
+        let amount_to_distribute = min(
+            excess_inline_size.scale_by(proportion),
+            excess_inline_size - *total_distributed_excess_size,
+        );
         *total_distributed_excess_size = *total_distributed_excess_size + amount_to_distribute;
-        intermediate_column_inline_size.size = intermediate_column_inline_size.size +
-            amount_to_distribute
+        intermediate_column_inline_size.size =
+            intermediate_column_inline_size.size + amount_to_distribute
     }
 }
 
@@ -760,28 +831,32 @@ struct IntermediateColumnInlineSize {
 ///
 /// `table_border_padding` is the sum of the sizes of all border and padding in the inline
 /// direction of the table contained within this table wrapper.
-fn initial_computed_inline_size(block: &mut BlockFlow,
-                                containing_block_inline_size: Au,
-                                minimum_width_of_all_columns: Au,
-                                preferred_width_of_all_columns: Au,
-                                table_border_padding: Au)
-                                -> MaybeAuto {
-    let inline_size_from_style = MaybeAuto::from_style(block.fragment.style.content_inline_size(),
-                                                       containing_block_inline_size);
+fn initial_computed_inline_size(
+    block: &mut BlockFlow,
+    containing_block_inline_size: Au,
+    minimum_width_of_all_columns: Au,
+    preferred_width_of_all_columns: Au,
+    table_border_padding: Au,
+) -> MaybeAuto {
+    let inline_size_from_style = MaybeAuto::from_style(
+        block.fragment.style.content_inline_size(),
+        containing_block_inline_size,
+    );
     match inline_size_from_style {
         MaybeAuto::Auto => {
-            if preferred_width_of_all_columns + table_border_padding <= containing_block_inline_size {
+            if preferred_width_of_all_columns + table_border_padding <= containing_block_inline_size
+            {
                 MaybeAuto::Specified(preferred_width_of_all_columns + table_border_padding)
             } else if minimum_width_of_all_columns > containing_block_inline_size {
                 MaybeAuto::Specified(minimum_width_of_all_columns)
             } else {
                 MaybeAuto::Auto
             }
-        }
-        MaybeAuto::Specified(inline_size_from_style) => {
-            MaybeAuto::Specified(max(inline_size_from_style - table_border_padding,
-                                     minimum_width_of_all_columns))
-        }
+        },
+        MaybeAuto::Specified(inline_size_from_style) => MaybeAuto::Specified(max(
+            inline_size_from_style - table_border_padding,
+            minimum_width_of_all_columns,
+        )),
     }
 }
 
@@ -793,27 +868,33 @@ struct Table {
 
 impl ISizeAndMarginsComputer for Table {
     fn compute_border_and_padding(&self, block: &mut BlockFlow, containing_block_inline_size: Au) {
-        block.fragment.compute_border_and_padding(containing_block_inline_size)
+        block
+            .fragment
+            .compute_border_and_padding(containing_block_inline_size)
     }
 
-    fn initial_computed_inline_size(&self,
-                                    block: &mut BlockFlow,
-                                    parent_flow_inline_size: Au,
-                                    shared_context: &SharedStyleContext)
-                                    -> MaybeAuto {
+    fn initial_computed_inline_size(
+        &self,
+        block: &mut BlockFlow,
+        parent_flow_inline_size: Au,
+        shared_context: &SharedStyleContext,
+    ) -> MaybeAuto {
         let containing_block_inline_size =
             self.containing_block_inline_size(block, parent_flow_inline_size, shared_context);
-        initial_computed_inline_size(block,
-                                     containing_block_inline_size,
-                                     self.minimum_width_of_all_columns,
-                                     self.preferred_width_of_all_columns,
-                                     self.table_border_padding)
+        initial_computed_inline_size(
+            block,
+            containing_block_inline_size,
+            self.minimum_width_of_all_columns,
+            self.preferred_width_of_all_columns,
+            self.table_border_padding,
+        )
     }
 
-    fn solve_inline_size_constraints(&self,
-                                     block: &mut BlockFlow,
-                                     input: &ISizeConstraintInput)
-                                     -> ISizeConstraintSolution {
+    fn solve_inline_size_constraints(
+        &self,
+        block: &mut BlockFlow,
+        input: &ISizeConstraintInput,
+    ) -> ISizeConstraintSolution {
         self.solve_block_inline_size_constraints(block, input)
     }
 }
@@ -826,29 +907,33 @@ struct FloatedTable {
 
 impl ISizeAndMarginsComputer for FloatedTable {
     fn compute_border_and_padding(&self, block: &mut BlockFlow, containing_block_inline_size: Au) {
-        block.fragment.compute_border_and_padding(containing_block_inline_size)
+        block
+            .fragment
+            .compute_border_and_padding(containing_block_inline_size)
     }
 
-    fn initial_computed_inline_size(&self,
-                                    block: &mut BlockFlow,
-                                    parent_flow_inline_size: Au,
-                                    shared_context: &SharedStyleContext)
-                                    -> MaybeAuto {
+    fn initial_computed_inline_size(
+        &self,
+        block: &mut BlockFlow,
+        parent_flow_inline_size: Au,
+        shared_context: &SharedStyleContext,
+    ) -> MaybeAuto {
         let containing_block_inline_size =
-            self.containing_block_inline_size(block,
-                                              parent_flow_inline_size,
-                                              shared_context);
-        initial_computed_inline_size(block,
-                                     containing_block_inline_size,
-                                     self.minimum_width_of_all_columns,
-                                     self.preferred_width_of_all_columns,
-                                     self.table_border_padding)
+            self.containing_block_inline_size(block, parent_flow_inline_size, shared_context);
+        initial_computed_inline_size(
+            block,
+            containing_block_inline_size,
+            self.minimum_width_of_all_columns,
+            self.preferred_width_of_all_columns,
+            self.table_border_padding,
+        )
     }
 
-    fn solve_inline_size_constraints(&self,
-                                     block: &mut BlockFlow,
-                                     input: &ISizeConstraintInput)
-                                     -> ISizeConstraintSolution {
+    fn solve_inline_size_constraints(
+        &self,
+        block: &mut BlockFlow,
+        input: &ISizeConstraintInput,
+    ) -> ISizeConstraintSolution {
         FloatNonReplaced.solve_inline_size_constraints(block, input)
     }
 }
@@ -861,46 +946,54 @@ struct AbsoluteTable {
 
 impl ISizeAndMarginsComputer for AbsoluteTable {
     fn compute_border_and_padding(&self, block: &mut BlockFlow, containing_block_inline_size: Au) {
-        block.fragment.compute_border_and_padding(containing_block_inline_size)
+        block
+            .fragment
+            .compute_border_and_padding(containing_block_inline_size)
     }
 
-    fn initial_computed_inline_size(&self,
-                                    block: &mut BlockFlow,
-                                    parent_flow_inline_size: Au,
-                                    shared_context: &SharedStyleContext)
-                                    -> MaybeAuto {
+    fn initial_computed_inline_size(
+        &self,
+        block: &mut BlockFlow,
+        parent_flow_inline_size: Au,
+        shared_context: &SharedStyleContext,
+    ) -> MaybeAuto {
         let containing_block_inline_size =
-            self.containing_block_inline_size(block,
-                                              parent_flow_inline_size,
-                                              shared_context);
-        initial_computed_inline_size(block,
-                                     containing_block_inline_size,
-                                     self.minimum_width_of_all_columns,
-                                     self.preferred_width_of_all_columns,
-                                     self.table_border_padding)
+            self.containing_block_inline_size(block, parent_flow_inline_size, shared_context);
+        initial_computed_inline_size(
+            block,
+            containing_block_inline_size,
+            self.minimum_width_of_all_columns,
+            self.preferred_width_of_all_columns,
+            self.table_border_padding,
+        )
     }
 
-    fn containing_block_inline_size(&self,
-                                    block: &mut BlockFlow,
-                                    parent_flow_inline_size: Au,
-                                    shared_context: &SharedStyleContext)
-                                    -> Au {
-        AbsoluteNonReplaced.containing_block_inline_size(block,
-                                                         parent_flow_inline_size,
-                                                         shared_context)
+    fn containing_block_inline_size(
+        &self,
+        block: &mut BlockFlow,
+        parent_flow_inline_size: Au,
+        shared_context: &SharedStyleContext,
+    ) -> Au {
+        AbsoluteNonReplaced.containing_block_inline_size(
+            block,
+            parent_flow_inline_size,
+            shared_context,
+        )
     }
 
-    fn solve_inline_size_constraints(&self,
-                                     block: &mut BlockFlow,
-                                     input: &ISizeConstraintInput)
-                                     -> ISizeConstraintSolution {
+    fn solve_inline_size_constraints(
+        &self,
+        block: &mut BlockFlow,
+        input: &ISizeConstraintInput,
+    ) -> ISizeConstraintSolution {
         AbsoluteNonReplaced.solve_inline_size_constraints(block, input)
     }
 
-    fn set_inline_position_of_flow_if_necessary(&self,
-                                                block: &mut BlockFlow,
-                                                solution: ISizeConstraintSolution) {
+    fn set_inline_position_of_flow_if_necessary(
+        &self,
+        block: &mut BlockFlow,
+        solution: ISizeConstraintSolution,
+    ) {
         AbsoluteNonReplaced.set_inline_position_of_flow_if_necessary(block, solution);
     }
-
 }

components/layout/tests/size_of.rs

@@ -5,10 +5,15 @@
 #![cfg(target_pointer_width = "64")]
 
 extern crate layout;
-#[macro_use] extern crate size_of_test;
+#[macro_use]
+extern crate size_of_test;
 
 use layout::Fragment;
 use layout::SpecificFragmentInfo;
 
 size_of_test!(test_size_of_fragment, Fragment, 176);
-size_of_test!(test_size_of_specific_fragment_info, SpecificFragmentInfo, 24);
+size_of_test!(
+    test_size_of_specific_fragment_info,
+    SpecificFragmentInfo,
+    24
+);

components/layout/text.rs

@@ -55,7 +55,6 @@ fn text(fragments: &LinkedList<Fragment>) -> String {
     text
 }
 
-
 /// A stack-allocated object for scanning an inline flow into `TextRun`-containing `TextFragment`s.
 pub struct TextRunScanner {
     pub clump: LinkedList<Fragment>,
@@ -68,16 +67,25 @@ impl TextRunScanner {
         }
     }
 
-    pub fn scan_for_runs(&mut self,
-                         font_context: &mut LayoutFontContext,
-                         mut fragments: LinkedList<Fragment>)
-                         -> InlineFragments {
-        debug!("TextRunScanner: scanning {} fragments for text runs...", fragments.len());
+    pub fn scan_for_runs(
+        &mut self,
+        font_context: &mut LayoutFontContext,
+        mut fragments: LinkedList<Fragment>,
+    ) -> InlineFragments {
+        debug!(
+            "TextRunScanner: scanning {} fragments for text runs...",
+            fragments.len()
+        );
         debug_assert!(!fragments.is_empty());
 
         // Calculate bidi embedding levels, so we can split bidirectional fragments for reordering.
         let text = text(&fragments);
-        let para_level = fragments.front().unwrap().style.writing_mode.to_bidi_level();
+        let para_level = fragments
+            .front()
+            .unwrap()
+            .style
+            .writing_mode
+            .to_bidi_level();
         let bidi_info = bidi::BidiInfo::new(&text, Some(para_level));
 
         // Optimization: If all the text is LTR, don't bother splitting on bidi levels.
@@ -106,22 +114,25 @@ impl TextRunScanner {
             // Create a clump.
             split_first_fragment_at_newline_if_necessary(&mut fragments);
             self.clump.append(&mut split_off_head(&mut fragments));
-            while !fragments.is_empty() && self.clump
-                                               .back()
-                                               .unwrap()
-                                               .can_merge_with_fragment(fragments.front()
-                                                                                 .unwrap()) {
+            while !fragments.is_empty() && self
+                .clump
+                .back()
+                .unwrap()
+                .can_merge_with_fragment(fragments.front().unwrap())
+            {
                 split_first_fragment_at_newline_if_necessary(&mut fragments);
                 self.clump.append(&mut split_off_head(&mut fragments));
             }
 
             // Flush that clump to the list of fragments we're building up.
-            last_whitespace = self.flush_clump_to_list(font_context,
-                                                       &mut new_fragments,
-                                                       &mut paragraph_bytes_processed,
-                                                       bidi_levels,
-                                                       last_whitespace,
-                                                       &mut linebreaker);
+            last_whitespace = self.flush_clump_to_list(
+                font_context,
+                &mut new_fragments,
+                &mut paragraph_bytes_processed,
+                bidi_levels,
+                last_whitespace,
+                &mut linebreaker,
+            );
         }
 
         debug!("TextRunScanner: complete.");
@@ -136,25 +147,31 @@ impl TextRunScanner {
     /// The flow keeps track of the fragments contained by all non-leaf DOM nodes. This is necessary
     /// for correct painting order. Since we compress several leaf fragments here, the mapping must
     /// be adjusted.
-    fn flush_clump_to_list(&mut self,
-                           mut font_context: &mut LayoutFontContext,
-                           out_fragments: &mut Vec<Fragment>,
-                           paragraph_bytes_processed: &mut usize,
-                           bidi_levels: Option<&[bidi::Level]>,
-                           mut last_whitespace: bool,
-                           linebreaker: &mut Option<LineBreakLeafIter>)
-                           -> bool {
-        debug!("TextRunScanner: flushing {} fragments in range", self.clump.len());
+    fn flush_clump_to_list(
+        &mut self,
+        mut font_context: &mut LayoutFontContext,
+        out_fragments: &mut Vec<Fragment>,
+        paragraph_bytes_processed: &mut usize,
+        bidi_levels: Option<&[bidi::Level]>,
+        mut last_whitespace: bool,
+        linebreaker: &mut Option<LineBreakLeafIter>,
+    ) -> bool {
+        debug!(
+            "TextRunScanner: flushing {} fragments in range",
+            self.clump.len()
+        );
 
         debug_assert!(!self.clump.is_empty());
         match self.clump.front().unwrap().specific {
-            SpecificFragmentInfo::UnscannedText(_) => {}
+            SpecificFragmentInfo::UnscannedText(_) => {},
             _ => {
-                debug_assert!(self.clump.len() == 1,
-                              "WAT: can't coalesce non-text nodes in flush_clump_to_list()!");
+                debug_assert!(
+                    self.clump.len() == 1,
+                    "WAT: can't coalesce non-text nodes in flush_clump_to_list()!"
+                );
                 out_fragments.push(self.clump.pop_front().unwrap());
-                return false
-            }
+                return false;
+            },
         }
 
         // Concatenate all of the transformed strings together, saving the new character indices.
@@ -173,17 +190,19 @@ impl TextRunScanner {
                 let inherited_text_style = in_fragment.style().get_inherited_text();
                 font_group = font_context.font_group(font_style);
                 compression = match in_fragment.white_space() {
-                    WhiteSpace::Normal |
-                    WhiteSpace::Nowrap => CompressionMode::CompressWhitespaceNewline,
-                    WhiteSpace::Pre |
-                    WhiteSpace::PreWrap => CompressionMode::CompressNone,
+                    WhiteSpace::Normal | WhiteSpace::Nowrap => {
+                        CompressionMode::CompressWhitespaceNewline
+                    },
+                    WhiteSpace::Pre | WhiteSpace::PreWrap => CompressionMode::CompressNone,
                     WhiteSpace::PreLine => CompressionMode::CompressWhitespace,
                 };
                 text_transform = inherited_text_style.text_transform;
                 letter_spacing = inherited_text_style.letter_spacing;
-                word_spacing = inherited_text_style.word_spacing.value()
-                               .map(|lop| lop.to_hash_key())
-                               .unwrap_or((Au(0), NotNan::new(0.0).unwrap()));
+                word_spacing = inherited_text_style
+                    .word_spacing
+                    .value()
+                    .map(|lop| lop.to_hash_key())
+                    .unwrap_or((Au(0), NotNan::new(0.0).unwrap()));
                 text_rendering = inherited_text_style.text_rendering;
                 word_break = inherited_text_style.word_break;
             }
@@ -201,7 +220,7 @@ impl TextRunScanner {
                     SpecificFragmentInfo::UnscannedText(ref text_fragment_info) => {
                         text = &text_fragment_info.text;
                         selection = text_fragment_info.selection;
-                    }
+                    },
                     _ => panic!("Expected an unscanned text fragment!"),
                 };
                 insertion_point = match selection {
@@ -209,14 +228,16 @@ impl TextRunScanner {
                         // `range` is the range within the current fragment. To get the range
                         // within the text run, offset it by the length of the preceding fragments.
                         Some(range.begin() + ByteIndex(run_info.text.len() as isize))
-                    }
-                    _ => None
+                    },
+                    _ => None,
                 };
 
                 let (mut start_position, mut end_position) = (0, 0);
                 for (byte_index, character) in text.char_indices() {
                     if !character.is_control() {
-                        let font = font_group.borrow_mut().find_by_codepoint(&mut font_context, character);
+                        let font = font_group
+                            .borrow_mut()
+                            .find_by_codepoint(&mut font_context, character);
 
                         let bidi_level = match bidi_levels {
                             Some(levels) => levels[*paragraph_bytes_processed],
@@ -230,19 +251,20 @@ impl TextRunScanner {
                         // http://www.unicode.org/reports/tr24/#Common
                         let script = get_script(character);
                         let compatible_script = is_compatible(script, run_info.script);
-                        if compatible_script && !is_specific(run_info.script) && is_specific(script) {
+                        if compatible_script && !is_specific(run_info.script) && is_specific(script)
+                        {
                             run_info.script = script;
                         }
 
                         let selected = match selection {
                             Some(range) => range.contains(ByteIndex(byte_index as isize)),
-                            None => false
+                            None => false,
                         };
 
                         // Now, if necessary, flush the mapping we were building up.
                         let flush_run = !run_info.has_font(&font) ||
-                                        run_info.bidi_level != bidi_level ||
-                                        !compatible_script;
+                            run_info.bidi_level != bidi_level ||
+                            !compatible_script;
                         let new_mapping_needed = flush_run || mapping.selected != selected;
 
                         if new_mapping_needed {
@@ -250,22 +272,23 @@ impl TextRunScanner {
                             // The run info values are uninitialized at this point so
                             // flushing an empty mapping is pointless.
                             if end_position > 0 {
-                                mapping.flush(&mut mappings,
-                                              &mut run_info,
-                                              &**text,
-                                              compression,
-                                              text_transform,
-                                              &mut last_whitespace,
-                                              &mut start_position,
-                                              end_position);
+                                mapping.flush(
+                                    &mut mappings,
+                                    &mut run_info,
+                                    &**text,
+                                    compression,
+                                    text_transform,
+                                    &mut last_whitespace,
+                                    &mut start_position,
+                                    end_position,
+                                );
                             }
                             if run_info.text.len() > 0 {
                                 if flush_run {
                                     run_info.flush(&mut run_info_list, &mut insertion_point);
                                     run_info = RunInfo::new();
                                 }
-                                mapping = RunMapping::new(&run_info_list[..],
-                                                          fragment_index);
+                                mapping = RunMapping::new(&run_info_list[..], fragment_index);
                             }
                             run_info.font = font;
                             run_info.bidi_level = bidi_level;
@@ -280,14 +303,16 @@ impl TextRunScanner {
                 }
 
                 // Flush the last mapping we created for this fragment to the list.
-                mapping.flush(&mut mappings,
-                              &mut run_info,
-                              &**text,
-                              compression,
-                              text_transform,
-                              &mut last_whitespace,
-                              &mut start_position,
-                              end_position);
+                mapping.flush(
+                    &mut mappings,
+                    &mut run_info,
+                    &**text,
+                    compression,
+                    text_transform,
+                    &mut last_whitespace,
+                    &mut start_position,
+                    end_position,
+                );
             }
 
             // Push the final run info.
@@ -326,20 +351,25 @@ impl TextRunScanner {
                 }
 
                 // If no font is found (including fallbacks), there's no way we can render.
-                let font =
-                    run_info.font
-                        .or_else(|| font_group.borrow_mut().first(&mut font_context))
-                        .expect("No font found for text run!");
+                let font = run_info
+                    .font
+                    .or_else(|| font_group.borrow_mut().first(&mut font_context))
+                    .expect("No font found for text run!");
 
-                let (run, break_at_zero) = TextRun::new(&mut *font.borrow_mut(),
-                                                        run_info.text,
-                                                        &options,
-                                                        run_info.bidi_level,
-                                                        linebreaker);
-                result.push((ScannedTextRun {
-                    run: Arc::new(run),
-                    insertion_point: run_info.insertion_point,
-                }, break_at_zero))
+                let (run, break_at_zero) = TextRun::new(
+                    &mut *font.borrow_mut(),
+                    run_info.text,
+                    &options,
+                    run_info.bidi_level,
+                    linebreaker,
+                );
+                result.push((
+                    ScannedTextRun {
+                        run: Arc::new(run),
+                        insertion_point: run_info.insertion_point,
+                    },
+                    break_at_zero,
+                ))
             }
             result
         };
@@ -349,12 +379,14 @@ impl TextRunScanner {
         let mut mappings = mappings.into_iter().peekable();
         let mut prev_fragments_to_meld = Vec::new();
 
-        for (logical_offset, old_fragment) in
-                mem::replace(&mut self.clump, LinkedList::new()).into_iter().enumerate() {
+        for (logical_offset, old_fragment) in mem::replace(&mut self.clump, LinkedList::new())
+            .into_iter()
+            .enumerate()
+        {
             let mut is_first_mapping_of_this_old_fragment = true;
             loop {
                 match mappings.peek() {
-                    Some(mapping) if mapping.old_fragment_index == logical_offset => {}
+                    Some(mapping) if mapping.old_fragment_index == logical_offset => {},
                     Some(_) | None => {
                         if is_first_mapping_of_this_old_fragment {
                             // There were no mappings for this unscanned fragment. Transfer its
@@ -365,13 +397,15 @@ impl TextRunScanner {
                             prev_fragments_to_meld.push(old_fragment);
                         }
                         break;
-                    }
+                    },
                 };
                 let mapping = mappings.next().unwrap();
                 let (scanned_run, break_at_zero) = runs[mapping.text_run_index].clone();
 
-                let mut byte_range = Range::new(ByteIndex(mapping.byte_range.begin() as isize),
-                                                ByteIndex(mapping.byte_range.length() as isize));
+                let mut byte_range = Range::new(
+                    ByteIndex(mapping.byte_range.begin() as isize),
+                    ByteIndex(mapping.byte_range.length() as isize),
+                );
 
                 let mut flags = ScannedTextFlags::empty();
                 if !break_at_zero && mapping.byte_range.begin() == 0 {
@@ -381,31 +415,34 @@ impl TextRunScanner {
                 }
                 let text_size = old_fragment.border_box.size;
 
-                let requires_line_break_afterward_if_wrapping_on_newlines =
-                    scanned_run.run.text[mapping.byte_range.begin()..mapping.byte_range.end()]
+                let requires_line_break_afterward_if_wrapping_on_newlines = scanned_run.run.text
+                    [mapping.byte_range.begin()..mapping.byte_range.end()]
                     .ends_with('\n');
 
                 if requires_line_break_afterward_if_wrapping_on_newlines {
                     byte_range.extend_by(ByteIndex(-1)); // Trim the '\n'
-                    flags.insert(ScannedTextFlags::REQUIRES_LINE_BREAK_AFTERWARD_IF_WRAPPING_ON_NEWLINES);
+                    flags.insert(
+                        ScannedTextFlags::REQUIRES_LINE_BREAK_AFTERWARD_IF_WRAPPING_ON_NEWLINES,
+                    );
                 }
 
                 if mapping.selected {
                     flags.insert(ScannedTextFlags::SELECTED);
                 }
 
-                let insertion_point = if mapping.contains_insertion_point(scanned_run.insertion_point) {
-                    scanned_run.insertion_point
-                } else {
-                    None
-                };
+                let insertion_point =
+                    if mapping.contains_insertion_point(scanned_run.insertion_point) {
+                        scanned_run.insertion_point
+                    } else {
+                        None
+                    };
 
                 let mut new_text_fragment_info = Box::new(ScannedTextFragmentInfo::new(
                     scanned_run.run,
                     byte_range,
                     text_size,
                     insertion_point,
-                    flags
+                    flags,
                 ));
 
                 let new_metrics = new_text_fragment_info.run.metrics_for_range(&byte_range);
@@ -415,20 +452,23 @@ impl TextRunScanner {
 
                 let mut new_fragment = old_fragment.transform(
                     bounding_box_size,
-                    SpecificFragmentInfo::ScannedText(new_text_fragment_info));
+                    SpecificFragmentInfo::ScannedText(new_text_fragment_info),
+                );
 
                 let is_last_mapping_of_this_old_fragment = match mappings.peek() {
                     Some(mapping) if mapping.old_fragment_index == logical_offset => false,
-                    _ => true
+                    _ => true,
                 };
 
                 if let Some(ref mut context) = new_fragment.inline_context {
                     for node in &mut context.nodes {
                         if !is_last_mapping_of_this_old_fragment {
-                            node.flags.remove(InlineFragmentNodeFlags::LAST_FRAGMENT_OF_ELEMENT);
+                            node.flags
+                                .remove(InlineFragmentNodeFlags::LAST_FRAGMENT_OF_ELEMENT);
                         }
                         if !is_first_mapping_of_this_old_fragment {
-                            node.flags.remove(InlineFragmentNodeFlags::FIRST_FRAGMENT_OF_ELEMENT);
+                            node.flags
+                                .remove(InlineFragmentNodeFlags::FIRST_FRAGMENT_OF_ELEMENT);
                         }
                     }
                 }
@@ -447,14 +487,17 @@ impl TextRunScanner {
 }
 
 #[inline]
-fn bounding_box_for_run_metrics(metrics: &RunMetrics, writing_mode: WritingMode)
-                                -> LogicalSize<Au> {
+fn bounding_box_for_run_metrics(
+    metrics: &RunMetrics,
+    writing_mode: WritingMode,
+) -> LogicalSize<Au> {
     // TODO: When the text-orientation property is supported, the block and inline directions may
     // be swapped for horizontal glyphs in vertical lines.
     LogicalSize::new(
         writing_mode,
         metrics.bounding_box.size.width,
-        metrics.bounding_box.size.height)
+        metrics.bounding_box.size.height,
+    )
 }
 
 /// Returns the metrics of the font represented by the given `FontStyleStruct`.
@@ -465,8 +508,10 @@ fn bounding_box_for_run_metrics(metrics: &RunMetrics, writing_mode: WritingMode)
 ///
 /// Panics if no font can be found for the given font style.
 #[inline]
-pub fn font_metrics_for_style(mut font_context: &mut LayoutFontContext, style: ::ServoArc<FontStyleStruct>)
-                              -> FontMetrics {
+pub fn font_metrics_for_style(
+    mut font_context: &mut LayoutFontContext,
+    style: ::ServoArc<FontStyleStruct>,
+) -> FontMetrics {
     let font_group = font_context.font_group(style);
     let font = font_group.borrow_mut().first(&mut font_context);
     let font = font.as_ref().unwrap().borrow();
@@ -480,13 +525,13 @@ pub fn line_height_from_style(style: &ComputedValues, metrics: &FontMetrics) ->
     match style.get_inherited_text().line_height {
         LineHeight::Normal => Au::from(metrics.line_gap),
         LineHeight::Number(l) => font_size.scale_by(l.0),
-        LineHeight::Length(l) => Au::from(l)
+        LineHeight::Length(l) => Au::from(l),
     }
 }
 
 fn split_first_fragment_at_newline_if_necessary(fragments: &mut LinkedList<Fragment>) {
     if fragments.is_empty() {
-        return
+        return;
     }
 
     let new_fragment = {
@@ -501,45 +546,46 @@ fn split_first_fragment_at_newline_if_necessary(fragments: &mut LinkedList<Fragm
             let unscanned_text_fragment_info = match first_fragment.specific {
                 SpecificFragmentInfo::UnscannedText(ref mut unscanned_text_fragment_info) => {
                     unscanned_text_fragment_info
-                }
+                },
                 _ => return,
             };
 
             let position = match unscanned_text_fragment_info.text.find('\n') {
                 Some(position) if position < unscanned_text_fragment_info.text.len() - 1 => {
                     position
-                }
+                },
                 Some(_) | None => return,
             };
 
-            string_before =
-                unscanned_text_fragment_info.text[..(position + 1)].to_owned();
-            unscanned_text_fragment_info.text =
-                unscanned_text_fragment_info.text[(position + 1)..].to_owned().into_boxed_str();
+            string_before = unscanned_text_fragment_info.text[..(position + 1)].to_owned();
+            unscanned_text_fragment_info.text = unscanned_text_fragment_info.text[(position + 1)..]
+                .to_owned()
+                .into_boxed_str();
             let offset = ByteIndex(string_before.len() as isize);
             match unscanned_text_fragment_info.selection {
                 Some(ref mut selection) if selection.begin() >= offset => {
                     // Selection is entirely in the second fragment.
                     selection_before = None;
                     selection.shift_by(-offset);
-                }
+                },
                 Some(ref mut selection) if selection.end() > offset => {
                     // Selection is split across two fragments.
                     selection_before = Some(Range::new(selection.begin(), offset));
                     *selection = Range::new(ByteIndex(0), selection.end() - offset);
-                }
+                },
                 _ => {
                     // Selection is entirely in the first fragment.
                     selection_before = unscanned_text_fragment_info.selection;
                     unscanned_text_fragment_info.selection = None;
-                }
+                },
             };
         }
         first_fragment.transform(
             first_fragment.border_box.size,
-            SpecificFragmentInfo::UnscannedText(Box::new(
-                UnscannedTextFragmentInfo::new(string_before.into_boxed_str(), selection_before)
-            ))
+            SpecificFragmentInfo::UnscannedText(Box::new(UnscannedTextFragmentInfo::new(
+                string_before.into_boxed_str(),
+                selection_before,
+            ))),
         )
     };
 
@@ -575,9 +621,7 @@ impl RunInfo {
     ///
     /// * `insertion_point`: The position of the insertion point, in characters relative to the start
     ///   of this text run.
-    fn flush(mut self,
-             list: &mut Vec<RunInfo>,
-             insertion_point: &mut Option<ByteIndex>) {
+    fn flush(mut self, list: &mut Vec<RunInfo>, insertion_point: &mut Option<ByteIndex>) {
         if let Some(idx) = *insertion_point {
             let char_len = ByteIndex(self.text.len() as isize);
             if idx <= char_len {
@@ -617,8 +661,7 @@ struct RunMapping {
 impl RunMapping {
     /// Given the current set of text runs, creates a run mapping for the next fragment.
     /// `run_info_list` describes the set of runs we've seen already.
-    fn new(run_info_list: &[RunInfo], fragment_index: usize)
-           -> RunMapping {
+    fn new(run_info_list: &[RunInfo], fragment_index: usize) -> RunMapping {
         RunMapping {
             byte_range: Range::new(0, 0),
             old_fragment_index: fragment_index,
@@ -629,27 +672,36 @@ impl RunMapping {
 
     /// Flushes this run mapping to the list. `run_info` describes the text run that we're
     /// currently working on. `text` refers to the text of this fragment.
-    fn flush(mut self,
-             mappings: &mut Vec<RunMapping>,
-             run_info: &mut RunInfo,
-             text: &str,
-             compression: CompressionMode,
-             text_transform: TextTransform,
-             last_whitespace: &mut bool,
-             start_position: &mut usize,
-             end_position: usize) {
+    fn flush(
+        mut self,
+        mappings: &mut Vec<RunMapping>,
+        run_info: &mut RunInfo,
+        text: &str,
+        compression: CompressionMode,
+        text_transform: TextTransform,
+        last_whitespace: &mut bool,
+        start_position: &mut usize,
+        end_position: usize,
+    ) {
         let was_empty = *start_position == end_position;
         let old_byte_length = run_info.text.len();
-        *last_whitespace = util::transform_text(&text[(*start_position)..end_position],
-                                                compression,
-                                                *last_whitespace,
-                                                &mut run_info.text);
+        *last_whitespace = util::transform_text(
+            &text[(*start_position)..end_position],
+            compression,
+            *last_whitespace,
+            &mut run_info.text,
+        );
 
         // Account for `text-transform`. (Confusingly, this is not handled in "text
         // transformation" above, but we follow Gecko in the naming.)
         let is_first_run = *start_position == 0;
-        apply_style_transform_if_necessary(&mut run_info.text, old_byte_length, text_transform,
-                                           *last_whitespace, is_first_run);
+        apply_style_transform_if_necessary(
+            &mut run_info.text,
+            old_byte_length,
+            text_transform,
+            *last_whitespace,
+            is_first_run,
+        );
         *start_position = end_position;
 
         let new_byte_length = run_info.text.len();
@@ -674,38 +726,39 @@ impl RunMapping {
     fn contains_insertion_point(&self, insertion_point: Option<ByteIndex>) -> bool {
         match insertion_point.map(ByteIndex::to_usize) {
             None => false,
-            Some(idx) => self.byte_range.begin() <= idx && idx <= self.byte_range.end()
+            Some(idx) => self.byte_range.begin() <= idx && idx <= self.byte_range.end(),
         }
     }
 }
 
-
 /// Accounts for `text-transform`.
 ///
 /// FIXME(#4311, pcwalton): Title-case mapping can change length of the string;
 /// case mapping should be language-specific; `full-width`;
 /// use graphemes instead of characters.
-fn apply_style_transform_if_necessary(string: &mut String,
-                                      first_character_position: usize,
-                                      text_transform: TextTransform,
-                                      last_whitespace: bool,
-                                      is_first_run: bool) {
+fn apply_style_transform_if_necessary(
+    string: &mut String,
+    first_character_position: usize,
+    text_transform: TextTransform,
+    last_whitespace: bool,
+    is_first_run: bool,
+) {
     match text_transform {
-        TextTransform::None => {}
+        TextTransform::None => {},
         TextTransform::Uppercase => {
             let original = string[first_character_position..].to_owned();
             string.truncate(first_character_position);
             for ch in original.chars().flat_map(|ch| ch.to_uppercase()) {
                 string.push(ch);
             }
-        }
+        },
         TextTransform::Lowercase => {
             let original = string[first_character_position..].to_owned();
             string.truncate(first_character_position);
             for ch in original.chars().flat_map(|ch| ch.to_lowercase()) {
                 string.push(ch);
             }
-        }
+        },
         TextTransform::Capitalize => {
             let original = string[first_character_position..].to_owned();
             string.truncate(first_character_position);
@@ -719,7 +772,7 @@ fn apply_style_transform_if_necessary(string: &mut String,
                 if capitalize_next_letter && character.is_alphabetic() {
                     string.push(character.to_uppercase().next().unwrap());
                     capitalize_next_letter = false;
-                    continue
+                    continue;
                 }
 
                 string.push(character);
@@ -729,7 +782,7 @@ fn apply_style_transform_if_necessary(string: &mut String,
                     capitalize_next_letter = true
                 }
             }
-        }
+        },
     }
 }
 

components/layout/traversal.rs

@@ -33,9 +33,7 @@ impl<'a> RecalcStyleAndConstructFlows<'a> {
 impl<'a> RecalcStyleAndConstructFlows<'a> {
     /// Creates a traversal context, taking ownership of the shared layout context.
     pub fn new(context: LayoutContext<'a>) -> Self {
-        RecalcStyleAndConstructFlows {
-            context: context,
-        }
+        RecalcStyleAndConstructFlows { context: context }
     }
 
     /// Consumes this traversal context, returning ownership of the shared layout
@@ -55,11 +53,11 @@ where
     fn process_preorder<F>(
         &self,
         traversal_data: &PerLevelTraversalData,
-        context: &mut StyleContext<E>, node: E::ConcreteNode,
+        context: &mut StyleContext<E>,
+        node: E::ConcreteNode,
         note_child: F,
-    )
-    where
-        F: FnMut(E::ConcreteNode)
+    ) where
+        F: FnMut(E::ConcreteNode),
     {
         // FIXME(pcwalton): Stop allocating here. Ideally this should just be
         // done by the HTML parser.
@@ -76,7 +74,7 @@ where
         construct_flows_at(&self.context, node);
     }
 
-    fn text_node_needs_traversal(node: E::ConcreteNode, parent_data: &ElementData)  -> bool {
+    fn text_node_needs_traversal(node: E::ConcreteNode, parent_data: &ElementData) -> bool {
         // Text nodes never need styling. However, there are two cases they may need
         // flow construction:
         // (1) They child doesn't yet have layout data (preorder traversal initializes it).
@@ -192,7 +190,8 @@ pub trait PostorderNodeMutTraversal<ConcreteThreadSafeLayoutNode: ThreadSafeLayo
 #[inline]
 #[allow(unsafe_code)]
 fn construct_flows_at<N>(context: &LayoutContext, node: N)
-    where N: LayoutNode,
+where
+    N: LayoutNode,
 {
     debug!("construct_flows_at: {:?}", node);
 
@@ -202,22 +201,32 @@ fn construct_flows_at<N>(context: &LayoutContext, node: N)
 
         // Always reconstruct if incremental layout is turned off.
         let nonincremental_layout = opts::get().nonincremental_layout;
-        if nonincremental_layout || tnode.restyle_damage() != RestyleDamage::empty() ||
-           node.as_element().map_or(false, |el| el.has_dirty_descendants()) {
+        if nonincremental_layout || tnode.restyle_damage() != RestyleDamage::empty() || node
+            .as_element()
+            .map_or(false, |el| el.has_dirty_descendants())
+        {
             let mut flow_constructor = FlowConstructor::new(context);
             if nonincremental_layout || !flow_constructor.repair_if_possible(&tnode) {
                 flow_constructor.process(&tnode);
-                debug!("Constructed flow for {:?}: {:x}",
-                       tnode,
-                       tnode.flow_debug_id());
+                debug!(
+                    "Constructed flow for {:?}: {:x}",
+                    tnode,
+                    tnode.flow_debug_id()
+                );
             }
         }
 
-        tnode.mutate_layout_data().unwrap().flags.insert(::data::LayoutDataFlags::HAS_BEEN_TRAVERSED);
+        tnode
+            .mutate_layout_data()
+            .unwrap()
+            .flags
+            .insert(::data::LayoutDataFlags::HAS_BEEN_TRAVERSED);
     }
 
     if let Some(el) = node.as_element() {
-        unsafe { el.unset_dirty_descendants(); }
+        unsafe {
+            el.unset_dirty_descendants();
+        }
     }
 }
 
@@ -231,12 +240,16 @@ impl<'a> PostorderFlowTraversal for BubbleISizes<'a> {
     #[inline]
     fn process(&self, flow: &mut Flow) {
         flow.bubble_inline_sizes();
-        flow.mut_base().restyle_damage.remove(ServoRestyleDamage::BUBBLE_ISIZES);
+        flow.mut_base()
+            .restyle_damage
+            .remove(ServoRestyleDamage::BUBBLE_ISIZES);
     }
 
     #[inline]
     fn should_process(&self, flow: &mut Flow) -> bool {
-        flow.base().restyle_damage.contains(ServoRestyleDamage::BUBBLE_ISIZES)
+        flow.base()
+            .restyle_damage
+            .contains(ServoRestyleDamage::BUBBLE_ISIZES)
     }
 }
 
@@ -254,7 +267,9 @@ impl<'a> PreorderFlowTraversal for AssignISizes<'a> {
 
     #[inline]
     fn should_process(&self, flow: &mut Flow) -> bool {
-        flow.base().restyle_damage.intersects(ServoRestyleDamage::REFLOW_OUT_OF_FLOW | ServoRestyleDamage::REFLOW)
+        flow.base()
+            .restyle_damage
+            .intersects(ServoRestyleDamage::REFLOW_OUT_OF_FLOW | ServoRestyleDamage::REFLOW)
     }
 }
 
@@ -275,7 +290,7 @@ impl<'a> PostorderFlowTraversal for AssignBSizes<'a> {
         // NB: We must return without resetting the restyle bits for these, as we haven't actually
         // reflowed anything!
         if flow.floats_might_flow_through() {
-            return
+            return;
         }
 
         flow.assign_block_size(self.layout_context);
@@ -298,13 +313,17 @@ pub struct ComputeStackingRelativePositions<'a> {
 impl<'a> PreorderFlowTraversal for ComputeStackingRelativePositions<'a> {
     #[inline]
     fn should_process_subtree(&self, flow: &mut Flow) -> bool {
-        flow.base().restyle_damage.contains(ServoRestyleDamage::REPOSITION)
+        flow.base()
+            .restyle_damage
+            .contains(ServoRestyleDamage::REPOSITION)
     }
 
     #[inline]
     fn process(&self, flow: &mut Flow) {
         flow.compute_stacking_relative_position(self.layout_context);
-        flow.mut_base().restyle_damage.remove(ServoRestyleDamage::REPOSITION)
+        flow.mut_base()
+            .restyle_damage
+            .remove(ServoRestyleDamage::REPOSITION)
     }
 }
 
@@ -322,7 +341,9 @@ impl<'a> BuildDisplayList<'a> {
         self.state.current_clipping_and_scrolling = flow.clipping_and_scrolling();
 
         flow.build_display_list(&mut self.state);
-        flow.mut_base().restyle_damage.remove(ServoRestyleDamage::REPAINT);
+        flow.mut_base()
+            .restyle_damage
+            .remove(ServoRestyleDamage::REPAINT);
 
         for kid in flow.mut_base().child_iter_mut() {
             self.traverse(kid);

components/layout/wrapper.rs

@@ -57,7 +57,8 @@ impl<T: GetLayoutData> LayoutNodeLayoutData for T {
     }
 
     fn flow_debug_id(self) -> usize {
-        self.borrow_layout_data().map_or(0, |d| d.flow_construction_result.debug_id())
+        self.borrow_layout_data()
+            .map_or(0, |d| d.flow_construction_result.debug_id())
     }
 }
 
@@ -114,12 +115,10 @@ impl<T: ThreadSafeLayoutNode> ThreadSafeLayoutNodeHelpers for T {
         if self.get_pseudo_element_type().is_replaced_content() {
             let style = self.as_element().unwrap().resolved_style();
 
-            return TextContent::GeneratedContent(
-                match style.as_ref().get_counters().content {
-                    Content::Items(ref value) => value.to_vec(),
-                    _ => vec![],
-                }
-            );
+            return TextContent::GeneratedContent(match style.as_ref().get_counters().content {
+                Content::Items(ref value) => value.to_vec(),
+                _ => vec![],
+            });
         }
 
         TextContent::Text(self.node_text_content().into_boxed_str())
@@ -141,7 +140,12 @@ impl<T: ThreadSafeLayoutNode> ThreadSafeLayoutNodeHelpers for T {
         let damage = {
             let data = node.get_raw_data().unwrap();
 
-            if !data.layout_data.borrow().flags.contains(::data::LayoutDataFlags::HAS_BEEN_TRAVERSED) {
+            if !data
+                .layout_data
+                .borrow()
+                .flags
+                .contains(::data::LayoutDataFlags::HAS_BEEN_TRAVERSED)
+            {
                 // We're reflowing a node that was styled for the first time and
                 // has never been visited by layout. Return rebuild_and_reflow,
                 // because that's what the code expects.
@@ -153,7 +157,6 @@ impl<T: ThreadSafeLayoutNode> ThreadSafeLayoutNodeHelpers for T {
 
         damage
     }
-
 }
 
 pub enum TextContent {