Rename ReplacedContent::layout to make_fragments and simplify its API

components/layout_2020/flow/inline.rs

@@ -17,7 +17,7 @@ use app_units::Au;
 use gfx::text::text_run::GlyphRun;
 use servo_arc::Arc;
 use style::properties::ComputedValues;
-use style::values::computed::{Length, LengthOrAuto, Percentage};
+use style::values::computed::{Length, Percentage};
 use style::Zero;
 use webrender_api::FontInstanceKey;
 
@@ -418,29 +418,13 @@ fn layout_atomic<'box_tree>(
     let fragment = match atomic.as_replaced() {
         Ok(replaced) => {
             // FIXME: implement https://drafts.csswg.org/css2/visudet.html#inline-replaced-width
-            let inline_size = Length::zero();
-            let block_size = Length::zero();
-            let containing_block_for_children = ContainingBlock {
-                inline_size,
-                block_size: LengthOrAuto::LengthPercentage(block_size),
-                mode: atomic.style.writing_mode(),
-            };
-            // https://drafts.csswg.org/css-writing-modes/#orthogonal-flows
-            assert_eq!(
-                ifc.containing_block.mode, containing_block_for_children.mode,
-                "Mixed writing modes are not supported yet"
-            );
-            let independent_layout = replaced.layout(&atomic.style, &containing_block_for_children);
-            let content_rect = Rect {
-                start_corner,
-                size: Vec2 {
-                    block: independent_layout.content_block_size,
-                    inline: inline_size,
-                },
-            };
+            // and https://drafts.csswg.org/css2/visudet.html#inline-replaced-height
+            let size = Vec2::zero();
+            let fragments = replaced.make_fragments(&atomic.style, size.clone());
+            let content_rect = Rect { start_corner, size };
             BoxFragment {
                 style: atomic.style.clone(),
-                children: independent_layout.fragments,
+                children: fragments,
                 content_rect,
                 padding,
                 border,

components/layout_2020/flow/mod.rs

@@ -516,17 +516,11 @@ fn layout_in_flow_replaced_block_level<'a>(
         block_start: computed_margin.block_start.auto_is(Length::zero),
         block_end: computed_margin.block_end.auto_is(Length::zero),
     };
-    let containing_block_for_children = ContainingBlock {
-        inline_size,
-        block_size: LengthOrAuto::LengthPercentage(block_size),
-        mode,
+    let size = Vec2 {
+        block: block_size,
+        inline: inline_size,
     };
-    // https://drafts.csswg.org/css-writing-modes/#orthogonal-flows
-    assert_eq!(
-        containing_block.mode, containing_block_for_children.mode,
-        "Mixed writing modes are not supported yet"
-    );
-    let independent_layout = replaced.layout(style, &containing_block_for_children);
+    let fragments = replaced.make_fragments(style, size.clone());
     let relative_adjustement = relative_adjustement(
         style,
         inline_size,
@@ -537,14 +531,11 @@ fn layout_in_flow_replaced_block_level<'a>(
             block: pb.block_start + relative_adjustement.block,
             inline: pb.inline_start + relative_adjustement.inline + margin.inline_start,
         },
-        size: Vec2 {
-            block: block_size,
-            inline: inline_size,
-        },
+        size,
     };
     BoxFragment {
         style: style.clone(),
-        children: independent_layout.fragments,
+        children: fragments,
         content_rect,
         padding,
         border,

components/layout_2020/positioned.rs

@@ -302,6 +302,25 @@ impl<'a> AbsolutelyPositionedFragment<'a> {
             }
         });
 
+        let mut absolutely_positioned_fragments = Vec::new();
+        let mut independent_layout = match self.absolutely_positioned_box.contents.as_replaced() {
+            Ok(replaced) => {
+                // FIXME: implement https://drafts.csswg.org/css2/visudet.html#abs-replaced-width
+                // and https://drafts.csswg.org/css2/visudet.html#abs-replaced-height
+                let block_size = block_size.auto_is(|| Length::zero());
+                let fragments = replaced.make_fragments(
+                    &self.absolutely_positioned_box.contents.style,
+                    Vec2 {
+                        inline: inline_size,
+                        block: block_size,
+                    },
+                );
+                crate::formatting_contexts::IndependentLayout {
+                    fragments,
+                    content_block_size: block_size,
+                }
+            },
+            Err(non_replaced) => {
                 let containing_block_for_children = ContainingBlock {
                     inline_size,
                     block_size,
@@ -312,14 +331,6 @@ impl<'a> AbsolutelyPositionedFragment<'a> {
                     containing_block.mode, containing_block_for_children.mode,
                     "Mixed writing modes are not supported yet"
                 );
-        let mut absolutely_positioned_fragments = Vec::new();
-        let mut independent_layout = match self.absolutely_positioned_box.contents.as_replaced() {
-            // FIXME: implement https://drafts.csswg.org/css2/visudet.html#abs-replaced-width
-            Ok(replaced) => replaced.layout(
-                &self.absolutely_positioned_box.contents.style,
-                &containing_block_for_children,
-            ),
-            Err(non_replaced) => {
                 let dummy_tree_rank = 0;
                 non_replaced.layout(
                     layout_context,
@@ -358,7 +369,7 @@ impl<'a> AbsolutelyPositionedFragment<'a> {
             &mut independent_layout.fragments,
             &content_rect.size,
             &padding,
-            containing_block_for_children.mode,
+            style.writing_mode(),
         );
 
         Fragment::Box(BoxFragment {

components/layout_2020/replaced.rs

@@ -3,10 +3,8 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 use crate::dom_traversal::NodeExt;
-use crate::formatting_contexts::IndependentLayout;
 use crate::fragments::{Fragment, ImageFragment};
 use crate::geom::{flow_relative, physical};
-use crate::ContainingBlock;
 use net_traits::image::base::Image;
 use servo_arc::Arc as ServoArc;
 use std::sync::Arc;
@@ -35,16 +33,13 @@ impl ReplacedContent {
         None
     }
 
-    pub fn layout<'a>(
+    pub fn make_fragments<'a>(
         &'a self,
         style: &ServoArc<ComputedValues>,
-        containing_block: &ContainingBlock,
-    ) -> IndependentLayout {
-        let (fragments, content_block_size) = match self.kind {
-            ReplacedContentKind::Image(ref image) => {
-                // FIXME(nox): We should not assume block size is known.
-                let block_size = containing_block.block_size.non_auto().unwrap();
-                let fragments = image
+        size: flow_relative::Vec2<Length>,
+    ) -> Vec<Fragment> {
+        match &self.kind {
+            ReplacedContentKind::Image(image) => image
                 .as_ref()
                 .and_then(|image| image.id)
                 .map(|image_key| {
@@ -52,22 +47,13 @@ impl ReplacedContent {
                         style: style.clone(),
                         content_rect: flow_relative::Rect {
                             start_corner: flow_relative::Vec2::zero(),
-                                size: flow_relative::Vec2 {
-                                    inline: containing_block.inline_size,
-                                    block: block_size,
-                                },
+                            size,
                         },
                         image_key,
                     })
                 })
                 .into_iter()
-                    .collect::<Vec<_>>();
-                (fragments, block_size)
-            },
-        };
-        IndependentLayout {
-            fragments,
-            content_block_size,
+                .collect(),
         }
     }
 }