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Remove bitfield! macro in favour of bitflags!

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Claes 'Letharion' Gyllensvärd 2014-11-16 14:39:16 +01:00
parent 64cc9ec688
commit 2737db3ad7
10 changed files with 146 additions and 175 deletions
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99
components/layout/block.rs
View file

@ -34,6 +34,11 @@ use display_list_builder::{BlockFlowDisplayListBuilding, BlockLevel, FragmentDis
use floats::{ClearBoth, ClearLeft, ClearRight, FloatKind, FloatLeft, Floats, PlacementInfo};
use flow::{AbsolutePositionInfo, BaseFlow, BlockFlowClass, FlowClass, Flow, ImmutableFlowUtils};
use flow::{MutableFlowUtils, PreorderFlowTraversal, PostorderFlowTraversal, mut_base};
use flow::{HAS_LEFT_FLOATED_DESCENDANTS, HAS_RIGHT_FLOATED_DESCENDANTS};
use flow::{IMPACTED_BY_LEFT_FLOATS, IMPACTED_BY_RIGHT_FLOATS};
use flow::{LAYERS_NEEDED_FOR_DESCENDANTS, NEEDS_LAYER};
use flow::{IS_ABSOLUTELY_POSITIONED};
use flow::{CLEARS_LEFT, CLEARS_RIGHT};
use flow;
use fragment::{Fragment, ImageFragment, InlineBlockFragment, FragmentBoundsIterator};
use fragment::ScannedTextFragment;
@ -439,7 +444,7 @@ impl<'a> PreorderFlowTraversal for AbsoluteAssignBSizesTraversal<'a> {
return;
}
assert!(block_flow.base.flags.is_absolutely_positioned());
assert!(block_flow.base.flags.contains(IS_ABSOLUTELY_POSITIONED));
if !block_flow.base.restyle_damage.intersects(REFLOW_OUT_OF_FLOW | REFLOW) {
return
}
@ -506,12 +511,12 @@ enum FormattingContextType {
fn propagate_layer_flag_from_child(layers_needed_for_descendants: &mut bool, kid: &mut Flow) {
if kid.is_absolute_containing_block() {
let kid_base = flow::mut_base(kid);
if kid_base.flags.needs_layer() {
if kid_base.flags.contains(NEEDS_LAYER) {
*layers_needed_for_descendants = true
}
} else {
let kid_base = flow::mut_base(kid);
if kid_base.flags.layers_needed_for_descendants() {
if kid_base.flags.contains(LAYERS_NEEDED_FOR_DESCENDANTS) {
*layers_needed_for_descendants = true
}
}
@ -628,7 +633,7 @@ impl BlockFlow {
/// This determines the algorithm used to calculate inline-size, block-size, and the
/// relevant margins for this Block.
pub fn block_type(&self) -> BlockType {
if self.base.flags.is_absolutely_positioned() {
if self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
if self.is_replaced_content() {
AbsoluteReplacedType
} else {
@ -704,7 +709,7 @@ impl BlockFlow {
/// reference the CB.
#[inline]
pub fn containing_block_size(&mut self, viewport_size: Size2D<Au>) -> LogicalSize<Au> {
debug_assert!(self.base.flags.is_absolutely_positioned());
debug_assert!(self.base.flags.contains(IS_ABSOLUTELY_POSITIONED));
if self.is_fixed() {
// Initial containing block is the CB for the root
LogicalSize::from_physical(self.base.writing_mode, viewport_size)
@ -832,7 +837,7 @@ impl BlockFlow {
// Absolute positioning establishes a block formatting context. Don't propagate floats
// in or out. (But do propagate them between kids.)
if self.base.flags.is_absolutely_positioned() ||
if self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) ||
margins_may_collapse != MarginsMayCollapse {
self.base.floats = Floats::new(self.fragment.style.writing_mode);
}
@ -847,7 +852,7 @@ impl BlockFlow {
let can_collapse_block_start_margin_with_kids =
margins_may_collapse == MarginsMayCollapse &&
!self.base.flags.is_absolutely_positioned() &&
!self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) &&
self.fragment.border_padding.block_start == Au(0);
margin_collapse_info.initialize_block_start_margin(
&self.fragment,
@ -857,7 +862,7 @@ impl BlockFlow {
let mut floats = self.base.floats.clone();
let mut layers_needed_for_descendants = false;
for kid in self.base.child_iter() {
if flow::base(kid).flags.is_absolutely_positioned() {
if flow::base(kid).flags.contains(IS_ABSOLUTELY_POSITIONED) {
// Assume that the *hypothetical box* for an absolute flow starts immediately
// after the block-end border edge of the previous flow.
kid.as_block().hypothetical_position.b = cur_b;
@ -914,8 +919,8 @@ impl BlockFlow {
translate_including_floats(&mut cur_b, delta, &mut floats);
// Clear past the floats that came in, if necessary.
let clearance = match (flow::base(kid).flags.clears_left(),
flow::base(kid).flags.clears_right()) {
let clearance = match (flow::base(kid).flags.contains(CLEARS_LEFT),
flow::base(kid).flags.contains(CLEARS_RIGHT)) {
(false, false) => Au(0),
(true, false) => floats.clearance(ClearLeft),
(false, true) => floats.clearance(ClearRight),
@ -947,7 +952,7 @@ impl BlockFlow {
// Mark ourselves for layerization if that will be necessary to paint in the proper
// order (CSS 2.1, Appendix E).
self.base.flags.set_layers_needed_for_descendants(layers_needed_for_descendants);
self.base.flags.set(LAYERS_NEEDED_FOR_DESCENDANTS, layers_needed_for_descendants);
// Collect various offsets needed by absolutely positioned descendants.
(&mut *self as &mut Flow).collect_static_block_offsets_from_children();
@ -955,7 +960,7 @@ impl BlockFlow {
// Add in our block-end margin and compute our collapsible margins.
let can_collapse_block_end_margin_with_kids =
margins_may_collapse == MarginsMayCollapse &&
!self.base.flags.is_absolutely_positioned() &&
!self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) &&
self.fragment.border_padding.block_end == Au(0);
let (collapsible_margins, delta) =
margin_collapse_info.finish_and_compute_collapsible_margins(
@ -977,16 +982,16 @@ impl BlockFlow {
}
if is_root || self.formatting_context_type() != NonformattingContext ||
self.base.flags.is_absolutely_positioned() {
self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
// The content block-size includes all the floats per CSS 2.1 § 10.6.7. The easiest
// way to handle this is to just treat it as clearance.
block_size = block_size + floats.clearance(ClearBoth);
}
if self.base.flags.is_absolutely_positioned() {
if self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
// Fixed position layers get layers.
if self.is_fixed() {
self.base.flags.set_needs_layer(true)
self.base.flags.insert(NEEDS_LAYER);
}
// Store the content block-size for use in calculating the absolute flow's
@ -1029,7 +1034,7 @@ impl BlockFlow {
self.fragment.border_box.size.block = cur_b;
self.fragment.border_box.start.b = Au(0);
if !self.base.flags.is_absolutely_positioned() {
if !self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
self.base.position.size.block = cur_b;
}
@ -1061,7 +1066,7 @@ impl BlockFlow {
// has not been calculated yet. (See `calculate_absolute_block_size_and_margins` for that.)
// Also don't remove the dirty bits if we're a block formatting context since our inline
// size has not yet been computed. (See `assign_inline_position_for_formatting_context()`.)
if !self.base.flags.is_absolutely_positioned() &&
if !self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) &&
self.formatting_context_type() == NonformattingContext {
self.base.restyle_damage.remove(REFLOW_OUT_OF_FLOW | REFLOW);
}
@ -1107,7 +1112,7 @@ impl BlockFlow {
Au(0),
self.fragment.margin.block_start);
if !self.base.flags.is_absolutely_positioned() {
if !self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
self.base.position = self.base.position.translate(&float_offset)
.translate(&margin_offset);
}
@ -1248,8 +1253,8 @@ impl BlockFlow {
content_inline_size: Au,
optional_column_inline_sizes: Option<&[ColumnInlineSize]>) {
// Keep track of whether floats could impact each child.
let mut inline_start_floats_impact_child = self.base.flags.impacted_by_left_floats();
let mut inline_end_floats_impact_child = self.base.flags.impacted_by_right_floats();
let mut inline_start_floats_impact_child = self.base.flags.contains(IMPACTED_BY_LEFT_FLOATS);
let mut inline_end_floats_impact_child = self.base.flags.contains(IMPACTED_BY_RIGHT_FLOATS);
let absolute_static_i_offset = if self.is_positioned() {
// This flow is the containing block. The static inline offset will be the inline-start
@ -1316,7 +1321,7 @@ impl BlockFlow {
// and its inline-size is our content inline-size.
{
let kid_base = flow::mut_base(kid);
if !kid_base.flags.is_absolutely_positioned() {
if !kid_base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
kid_base.position.start.i = inline_start_content_edge
}
kid_base.block_container_inline_size = content_inline_size;
@ -1326,11 +1331,11 @@ impl BlockFlow {
}
// Determine float impaction.
if flow::base(kid).flags.clears_left() {
if flow::base(kid).flags.contains(CLEARS_LEFT) {
inline_start_floats_impact_child = false;
inline_size_of_preceding_left_floats = Au(0);
}
if flow::base(kid).flags.clears_right() {
if flow::base(kid).flags.contains(CLEARS_RIGHT) {
inline_end_floats_impact_child = false;
inline_size_of_preceding_right_floats = Au(0);
}
@ -1338,11 +1343,11 @@ impl BlockFlow {
{
let kid_base = flow::mut_base(kid);
inline_start_floats_impact_child = inline_start_floats_impact_child ||
kid_base.flags.has_left_floated_descendants();
kid_base.flags.contains(HAS_LEFT_FLOATED_DESCENDANTS);
inline_end_floats_impact_child = inline_end_floats_impact_child ||
kid_base.flags.has_right_floated_descendants();
kid_base.flags.set_impacted_by_left_floats(inline_start_floats_impact_child);
kid_base.flags.set_impacted_by_right_floats(inline_end_floats_impact_child);
kid_base.flags.contains(HAS_RIGHT_FLOATED_DESCENDANTS);
kid_base.flags.set(IMPACTED_BY_LEFT_FLOATS, inline_start_floats_impact_child);
kid_base.flags.set(IMPACTED_BY_RIGHT_FLOATS, inline_end_floats_impact_child);
}
if kid.is_block_flow() {
@ -1468,8 +1473,8 @@ impl Flow for BlockFlow {
let _scope = layout_debug_scope!("block::bubble_inline_sizes {:x}", self.base.debug_id());
let mut flags = self.base.flags;
flags.set_has_left_floated_descendants(false);
flags.set_has_right_floated_descendants(false);
flags.remove(HAS_LEFT_FLOATED_DESCENDANTS);
flags.remove(HAS_RIGHT_FLOATED_DESCENDANTS);
// If this block has a fixed width, just use that for the minimum
// and preferred width, rather than bubbling up children inline
@ -1484,7 +1489,7 @@ impl Flow for BlockFlow {
let mut left_float_width = Au(0);
let mut right_float_width = Au(0);
for kid in self.base.child_iter() {
let is_absolutely_positioned = flow::base(kid).flags.is_absolutely_positioned();
let is_absolutely_positioned = flow::base(kid).flags.contains(IS_ABSOLUTELY_POSITIONED);
let child_base = flow::mut_base(kid);
let float_kind = child_base.flags.float_kind();
if !is_absolutely_positioned && !fixed_width {
@ -1523,8 +1528,8 @@ impl Flow for BlockFlow {
match self.fragment.style().get_box().float {
float::none => {}
float::left => flags.set_has_left_floated_descendants(true),
float::right => flags.set_has_right_floated_descendants(true),
float::left => flags.insert(HAS_LEFT_FLOATED_DESCENDANTS),
float::right => flags.insert(HAS_RIGHT_FLOATED_DESCENDANTS),
}
self.base.flags = flags
}
@ -1557,8 +1562,8 @@ impl Flow for BlockFlow {
self.base.writing_mode, layout_context.shared.screen_size).inline;
// The root element is never impacted by floats.
self.base.flags.set_impacted_by_left_floats(false);
self.base.flags.set_impacted_by_right_floats(false);
self.base.flags.remove(IMPACTED_BY_LEFT_FLOATS);
self.base.flags.remove(IMPACTED_BY_RIGHT_FLOATS);
}
// Our inline-size was set to the inline-size of the containing block by the flow's parent.
@ -1569,8 +1574,8 @@ impl Flow for BlockFlow {
match self.formatting_context_type() {
NonformattingContext => {}
BlockFormattingContext => {
self.base.flags.set_impacted_by_left_floats(false);
self.base.flags.set_impacted_by_right_floats(false);
self.base.flags.remove(IMPACTED_BY_LEFT_FLOATS);
self.base.flags.remove(IMPACTED_BY_RIGHT_FLOATS);
// We can't actually compute the inline-size of this block now, because floats
// might affect it. Speculate that its inline-size is equal to the inline-size
@ -1581,8 +1586,8 @@ impl Flow for BlockFlow {
self.inline_size_of_preceding_right_floats;
}
OtherFormattingContext => {
self.base.flags.set_impacted_by_left_floats(false);
self.base.flags.set_impacted_by_right_floats(false);
self.base.flags.remove(IMPACTED_BY_LEFT_FLOATS);
self.base.flags.remove(IMPACTED_BY_RIGHT_FLOATS);
}
}
@ -1613,7 +1618,7 @@ impl Flow for BlockFlow {
}
let is_formatting_context = self.formatting_context_type() != NonformattingContext;
if !self.base.flags.is_absolutely_positioned() && is_formatting_context {
if !self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) && is_formatting_context {
self.assign_inline_position_for_formatting_context();
}
@ -1647,7 +1652,7 @@ impl Flow for BlockFlow {
let containing_block_block_size =
self.base.block_container_explicit_block_size.unwrap_or(Au(0));
self.fragment.assign_replaced_block_size_if_necessary(containing_block_block_size);
if !self.base.flags.is_absolutely_positioned() {
if !self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
self.base.position.size.block = self.fragment.border_box.size.block;
}
} else if self.is_root() || self.is_float() || self.is_inline_block() {
@ -1668,7 +1673,7 @@ impl Flow for BlockFlow {
self.base.clip_rect = MAX_RECT
}
if self.base.flags.is_absolutely_positioned() {
if self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
let position_start = self.base.position.start.to_physical(self.base.writing_mode,
container_size);
@ -1718,7 +1723,7 @@ impl Flow for BlockFlow {
.stacking_relative_position_of_absolute_containing_block
},
relative_containing_block_size: self.fragment.content_box().size,
layers_needed_for_positioned_flows: self.base.flags.layers_needed_for_descendants(),
layers_needed_for_positioned_flows: self.base.flags.contains(LAYERS_NEEDED_FOR_DESCENDANTS),
};
// Compute the origin and clipping rectangle for children.
@ -1733,7 +1738,7 @@ impl Flow for BlockFlow {
// Process children.
let writing_mode = self.base.writing_mode;
for kid in self.base.child_iter() {
if !flow::base(kid).flags.is_absolutely_positioned() {
if !flow::base(kid).flags.contains(IS_ABSOLUTELY_POSITIONED) {
let kid_base = flow::mut_base(kid);
kid_base.stacking_relative_position =
origin_for_children +
@ -1760,7 +1765,7 @@ impl Flow for BlockFlow {
///
/// Currently happens only for absolutely positioned flows.
fn is_store_overflow_delayed(&mut self) -> bool {
self.base.flags.is_absolutely_positioned()
self.base.flags.contains(IS_ABSOLUTELY_POSITIONED)
}
fn is_root(&self) -> bool {
@ -1801,7 +1806,7 @@ impl Flow for BlockFlow {
}
fn update_late_computed_inline_position_if_necessary(&mut self, inline_position: Au) {
if self.base.flags.is_absolutely_positioned() &&
if self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) &&
self.fragment.style().logical_position().inline_start == LPA_Auto &&
self.fragment.style().logical_position().inline_end == LPA_Auto {
self.base.position.start.i = inline_position
@ -1809,7 +1814,7 @@ impl Flow for BlockFlow {
}
fn update_late_computed_block_position_if_necessary(&mut self, block_position: Au) {
if self.base.flags.is_absolutely_positioned() &&
if self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) &&
self.fragment.style().logical_position().block_start == LPA_Auto &&
self.fragment.style().logical_position().block_end == LPA_Auto {
self.base.position.start.b = block_position
@ -1821,7 +1826,7 @@ impl Flow for BlockFlow {
// TODO(#2009, pcwalton): This is a pseudo-stacking context. We need to merge `z-index:
// auto` kids into the parent stacking context, when that is supported.
self.build_display_list_for_floating_block(layout_context)
} else if self.base.flags.is_absolutely_positioned() {
} else if self.base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
self.build_display_list_for_absolutely_positioned_block(layout_context)
} else {
self.build_display_list_for_block(layout_context, BlockLevel)

5
components/layout/construct.rs
View file

@ -19,6 +19,7 @@ use context::LayoutContext;
use floats::FloatKind;
use flow::{Flow, ImmutableFlowUtils, MutableOwnedFlowUtils};
use flow::{Descendants, AbsDescendants};
use flow::{IS_ABSOLUTELY_POSITIONED};
use flow;
use flow_ref::FlowRef;
use fragment::{Fragment, GenericFragment, IframeFragment, IframeFragmentInfo, ImageFragment};
@ -527,7 +528,7 @@ impl<'a> FlowConstructor<'a> {
// Set up the absolute descendants.
let is_positioned = flow.as_block().is_positioned();
let is_absolutely_positioned = flow::base(&*flow).flags.is_absolutely_positioned();
let is_absolutely_positioned = flow::base(&*flow).flags.contains(IS_ABSOLUTELY_POSITIONED);
if is_positioned {
// This is the containing block for all the absolute descendants.
flow.set_absolute_descendants(abs_descendants);
@ -842,7 +843,7 @@ impl<'a> FlowConstructor<'a> {
wrapper_flow.finish();
let is_positioned = wrapper_flow.as_block().is_positioned();
let is_fixed_positioned = wrapper_flow.as_block().is_fixed();
let is_absolutely_positioned = flow::base(&*wrapper_flow).flags.is_absolutely_positioned();
let is_absolutely_positioned = flow::base(&*wrapper_flow).flags.contains(IS_ABSOLUTELY_POSITIONED);
if is_positioned {
// This is the containing block for all the absolute descendants.
wrapper_flow.set_absolute_descendants(abs_descendants);

5
components/layout/display_list_builder.rs
View file

@ -13,6 +13,7 @@
use block::BlockFlow;
use context::LayoutContext;
use flow::{mod, Flow};
use flow::{IS_ABSOLUTELY_POSITIONED, NEEDS_LAYER};
use fragment::{Fragment, GenericFragment, IframeFragment, IframeFragmentInfo, ImageFragment};
use fragment::{ImageFragmentInfo, InlineAbsoluteHypotheticalFragment, InlineBlockFragment};
use fragment::{ScannedTextFragment, ScannedTextFragmentInfo, TableFragment};
@ -809,7 +810,7 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
&self.base.clip_rect);
for kid in self.base.children.iter_mut() {
if flow::base(kid).flags.is_absolutely_positioned() {
if flow::base(kid).flags.contains(IS_ABSOLUTELY_POSITIONED) {
// All absolute flows will be handled by their containing block.
continue
}
@ -846,7 +847,7 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
let z_index = self.fragment.style().get_box().z_index.number_or_zero();
if !self.base.absolute_position_info.layers_needed_for_positioned_flows &&
!self.base.flags.needs_layer() {
!self.base.flags.contains(NEEDS_LAYER) {
// We didn't need a layer.
self.base.display_list_building_result =
StackingContextResult(Arc::new(StackingContext::new(display_list,

171
components/layout/flow.rs
View file

@ -256,7 +256,7 @@ pub trait Flow: fmt::Show + ToString + Sync {
}
fn is_positioned(&self) -> bool {
self.is_relatively_positioned() || base(self).flags.is_absolutely_positioned()
self.is_relatively_positioned() || base(self).flags.contains(IS_ABSOLUTELY_POSITIONED)
}
fn is_relatively_positioned(&self) -> bool {
@ -457,86 +457,66 @@ pub trait PostorderFlowTraversal {
}
}
/// Flags used in flows, tightly packed to save space.
#[deriving(Clone, Encodable)]
pub struct FlowFlags(pub u16);
bitflags! {
#[doc = "Flags used in flows."]
flags FlowFlags: u16 {
// floated descendants flags
#[doc = "Whether this flow has descendants that float left in the same block formatting"]
#[doc = "context."]
const HAS_LEFT_FLOATED_DESCENDANTS = 0b0000_0000_0000_0001,
#[doc = "Whether this flow has descendants that float right in the same block formatting"]
#[doc = "context."]
const HAS_RIGHT_FLOATED_DESCENDANTS = 0b0000_0000_0000_0010,
#[doc = "Whether this flow is impacted by floats to the left in the same block formatting"]
#[doc = "context (i.e. its height depends on some prior flows with `float: left`)."]
const IMPACTED_BY_LEFT_FLOATS = 0b0000_0000_0000_0100,
#[doc = "Whether this flow is impacted by floats to the right in the same block"]
#[doc = "formatting context (i.e. its height depends on some prior flows with `float:"]
#[doc = "right`)."]
const IMPACTED_BY_RIGHT_FLOATS = 0b0000_0000_0000_1000,
// text align flags
#[doc = "Whether this flow contains a flow that has its own layer within the same absolute"]
#[doc = "containing block."]
const LAYERS_NEEDED_FOR_DESCENDANTS = 0b0000_0000_0001_0000,
#[doc = "Whether this flow must have its own layer. Even if this flag is not set, it might"]
#[doc = "get its own layer if it's deemed to be likely to overlap flows with their own"]
#[doc = "layer."]
const NEEDS_LAYER = 0b0000_0000_0010_0000,
#[doc = "Whether this flow is absolutely positioned. This is checked all over layout, so a"]
#[doc = "virtual call is too expensive."]
const IS_ABSOLUTELY_POSITIONED = 0b0000_0000_0100_0000,
#[doc = "Whether this flow clears to the left. This is checked all over layout, so a"]
#[doc = "virtual call is too expensive."]
const CLEARS_LEFT = 0b0000_0000_1000_0000,
#[doc = "Whether this flow clears to the right. This is checked all over layout, so a"]
#[doc = "virtual call is too expensive."]
const CLEARS_RIGHT = 0b0000_0001_0000_0000,
#[doc = "Whether this flow is left-floated. This is checked all over layout, so a"]
#[doc = "virtual call is too expensive."]
const FLOATS_LEFT = 0b0000_0010_0000_0000,
#[doc = "Whether this flow is right-floated. This is checked all over layout, so a"]
#[doc = "virtual call is too expensive."]
const FLOATS_RIGHT = 0b0000_0100_0000_0000,
#[doc = "Text alignment."]
const TEXT_ALIGN = 0b0000_1000_0000_0000,
}
}
// NB: If you update this field, you must update the the floated descendants flags.
/// The bitmask of flags that represent the `has_left_floated_descendants` and
/// `has_right_floated_descendants` fields.
///
/// NB: If you update this field, you must update the bitfields below.
static HAS_FLOATED_DESCENDANTS_BITMASK: u16 = 0b0000_0000_0000_0011;
// Whether this flow has descendants that float left in the same block formatting context.
bitfield!(FlowFlags,
has_left_floated_descendants,
set_has_left_floated_descendants,
0b0000_0000_0000_0001)
// Whether this flow has descendants that float right in the same block formatting context.
bitfield!(FlowFlags,
has_right_floated_descendants,
set_has_right_floated_descendants,
0b0000_0000_0000_0010)
// Whether this flow is impacted by floats to the left in the same block formatting context (i.e.
// its block-size depends on some prior flows with `float: left`).
bitfield!(FlowFlags,
impacted_by_left_floats,
set_impacted_by_left_floats,
0b0000_0000_0000_0100)
// Whether this flow is impacted by floats to the right in the same block formatting context (i.e.
// its block-size depends on some prior flows with `float: right`).
bitfield!(FlowFlags, impacted_by_right_floats, set_impacted_by_right_floats, 0b0000_0000_0000_1000)
static HAS_FLOATED_DESCENDANTS_BITMASK: FlowFlags = FlowFlags { bits: 0b0000_0011 };
// NB: If you update this field, you must update the the text align flags.
/// The bitmask of flags that represent the text alignment field.
///
/// NB: If you update this field, you must update the bitfields below.
static TEXT_ALIGN_BITMASK: u16 = 0b0000_0000_0011_0000;
static TEXT_ALIGN_BITMASK: FlowFlags = FlowFlags { bits: 0b0011_0000 };
/// The number of bits we must shift off to handle the text alignment field.
///
/// NB: If you update this field, you must update the bitfields below.
static TEXT_ALIGN_SHIFT: u16 = 4;
// Whether this flow contains a flow that has its own layer within the same absolute containing
// block.
bitfield!(FlowFlags,
layers_needed_for_descendants,
set_layers_needed_for_descendants,
0b0000_0000_0100_0000)
// Whether this flow must have its own layer. Even if this flag is not set, it might get its own
// layer if it's deemed to be likely to overlap flows with their own layer.
bitfield!(FlowFlags, needs_layer, set_needs_layer, 0b0000_0000_1000_0000)
// Whether this flow is absolutely positioned. This is checked all over layout, so a virtual call
// is too expensive.
bitfield!(FlowFlags, is_absolutely_positioned, set_is_absolutely_positioned, 0b0000_0001_0000_0000)
// Whether this flow is left-floated. This is checked all over layout, so a virtual call is too
// expensive.
bitfield!(FlowFlags, floats_left, set_floats_left, 0b0000_0010_0000_0000)
// Whether this flow is right-floated. This is checked all over layout, so a virtual call is too
// expensive.
bitfield!(FlowFlags, floats_right, set_floats_right, 0b0000_0100_0000_0000)
// Whether this flow clears to the left. This is checked all over layout, so a virtual call is too
// expensive.
bitfield!(FlowFlags, clears_left, set_clears_left, 0b0000_1000_0000_0000)
// Whether this flow clears to the right. This is checked all over layout, so a virtual call is too
// expensive.
bitfield!(FlowFlags, clears_right, set_clears_right, 0b0001_0000_0000_0000)
static TEXT_ALIGN_SHIFT: uint = 4;
impl FlowFlags {
/// Creates a new set of flow flags.
pub fn new() -> FlowFlags {
FlowFlags(0)
}
/// Propagates text alignment flags from an appropriate parent flow per CSS 2.1.
///
/// FIXME(#2265, pcwalton): It would be cleaner and faster to make this a derived CSS property
@ -547,40 +527,43 @@ impl FlowFlags {
#[inline]
pub fn text_align(self) -> text_align::T {
let FlowFlags(ff) = self;
FromPrimitive::from_u16((ff & TEXT_ALIGN_BITMASK) >> TEXT_ALIGN_SHIFT as uint).unwrap()
FromPrimitive::from_u16((self & TEXT_ALIGN_BITMASK).bits() >> TEXT_ALIGN_SHIFT).unwrap()
}
#[inline]
pub fn set_text_align(&mut self, value: text_align::T) {
let FlowFlags(ff) = *self;
*self = FlowFlags((ff & !TEXT_ALIGN_BITMASK) | ((value as u16) << TEXT_ALIGN_SHIFT as uint))
*self = (*self & !TEXT_ALIGN_BITMASK) | FlowFlags::from_bits(value as u16 << TEXT_ALIGN_SHIFT).unwrap();
}
#[inline]
pub fn set_text_align_override(&mut self, parent: FlowFlags) {
let FlowFlags(ff) = *self;
let FlowFlags(pff) = parent;
*self = FlowFlags(ff | (pff & TEXT_ALIGN_BITMASK))
self.insert(parent & TEXT_ALIGN_BITMASK);
}
#[inline]
pub fn union_floated_descendants_flags(&mut self, other: FlowFlags) {
let FlowFlags(my_flags) = *self;
let FlowFlags(other_flags) = other;
*self = FlowFlags(my_flags | (other_flags & HAS_FLOATED_DESCENDANTS_BITMASK))
self.insert(other & HAS_FLOATED_DESCENDANTS_BITMASK);
}
#[inline]
pub fn impacted_by_floats(&self) -> bool {
self.impacted_by_left_floats() || self.impacted_by_right_floats()
self.contains(IMPACTED_BY_LEFT_FLOATS) || self.contains(IMPACTED_BY_RIGHT_FLOATS)
}
#[inline]
pub fn set(&mut self, flags: FlowFlags, value: bool) {
if value {
self.insert(flags);
} else {
self.remove(flags);
}
}
#[inline]
pub fn float_kind(&self) -> float::T {
if self.floats_left() {
if self.contains(FLOATS_LEFT) {
float::left
} else if self.floats_right() {
} else if self.contains(FLOATS_RIGHT) {
float::right
} else {
float::none
@ -589,7 +572,7 @@ impl FlowFlags {
#[inline]
pub fn clears_floats(&self) -> bool {
self.clears_left() || self.clears_right()
self.contains(CLEARS_LEFT) || self.contains(CLEARS_RIGHT)
}
}
@ -854,29 +837,29 @@ impl Drop for BaseFlow {
impl BaseFlow {
#[inline]
pub fn new(node: Option<ThreadSafeLayoutNode>, writing_mode: WritingMode) -> BaseFlow {
let mut flags = FlowFlags::new();
let mut flags = FlowFlags::empty();
match node {
None => {}
Some(node) => {
let node_style = node.style();
match node_style.get_box().position {
position::absolute | position::fixed => {
flags.set_is_absolutely_positioned(true)
flags.insert(IS_ABSOLUTELY_POSITIONED)
}
_ => {}
}
match node_style.get_box().float {
float::none => {}
float::left => flags.set_floats_left(true),
float::right => flags.set_floats_right(true),
float::left => flags.insert(FLOATS_LEFT),
float::right => flags.insert(FLOATS_RIGHT),
}
match node_style.get_box().clear {
clear::none => {}
clear::left => flags.set_clears_left(true),
clear::right => flags.set_clears_right(true),
clear::left => flags.insert(CLEARS_LEFT),
clear::right => flags.insert(CLEARS_RIGHT),
clear::both => {
flags.set_clears_left(true);
flags.set_clears_right(true);
flags.insert(CLEARS_LEFT);
flags.insert(CLEARS_RIGHT);
}
}
}
@ -1211,7 +1194,7 @@ impl<'a> MutableFlowUtils for &'a mut Flow + 'a {
let mut gives_absolute_offsets = true;
if kid.is_block_like() {
let kid_block = kid.as_block();
if kid_block.is_fixed() || kid_block.base.flags.is_absolutely_positioned() {
if kid_block.is_fixed() || kid_block.base.flags.contains(IS_ABSOLUTELY_POSITIONED) {
// It won't contribute any offsets for descendants because it would be the
// containing block for them.
gives_absolute_offsets = false;

5
components/layout/incremental.rs
View file

@ -3,6 +3,7 @@
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use flow::{mod, Flow};
use flow::{IS_ABSOLUTELY_POSITIONED};
use std::fmt;
use std::sync::Arc;
@ -183,13 +184,13 @@ pub trait LayoutDamageComputation {
impl<'a> LayoutDamageComputation for &'a mut Flow+'a {
fn compute_layout_damage(self) -> SpecialRestyleDamage {
let mut special_damage = SpecialRestyleDamage::empty();
let is_absolutely_positioned = flow::base(self).flags.is_absolutely_positioned();
let is_absolutely_positioned = flow::base(self).flags.contains(IS_ABSOLUTELY_POSITIONED);
{
let self_base = flow::mut_base(self);
for kid in self_base.children.iter_mut() {
let child_is_absolutely_positioned =
flow::base(kid).flags.is_absolutely_positioned();
flow::base(kid).flags.contains(IS_ABSOLUTELY_POSITIONED);
flow::mut_base(kid).restyle_damage
.insert(self_base.restyle_damage.damage_for_child(
is_absolutely_positioned,

3
components/layout/inline.rs
View file

@ -9,6 +9,7 @@ use context::LayoutContext;
use display_list_builder::{ContentLevel, DisplayListResult, FragmentDisplayListBuilding};
use floats::{FloatLeft, Floats, PlacementInfo};
use flow::{BaseFlow, FlowClass, Flow, InlineFlowClass, MutableFlowUtils};
use flow::{IS_ABSOLUTELY_POSITIONED};
use flow;
use fragment::{Fragment, InlineAbsoluteHypotheticalFragment, InlineBlockFragment};
use fragment::{FragmentBoundsIterator, ScannedTextFragment, ScannedTextFragmentInfo};
@ -1115,7 +1116,7 @@ impl Flow for InlineFlow {
// Assign block sizes for any inline-block descendants.
for kid in self.base.child_iter() {
if flow::base(kid).flags.is_absolutely_positioned() || kid.is_float() {
if flow::base(kid).flags.contains(IS_ABSOLUTELY_POSITIONED) || kid.is_float() {
continue
}
kid.assign_block_size_for_inorder_child_if_necessary(layout_context);

5
components/layout/table.rs
View file

@ -12,6 +12,7 @@ use construct::FlowConstructor;
use context::LayoutContext;
use floats::FloatKind;
use flow::{TableFlowClass, FlowClass, Flow, ImmutableFlowUtils};
use flow::{IMPACTED_BY_LEFT_FLOATS, IMPACTED_BY_RIGHT_FLOATS};
use fragment::{Fragment, FragmentBoundsIterator};
use layout_debug;
use model::{IntrinsicISizes, IntrinsicISizesContribution};
@ -290,8 +291,8 @@ impl Flow for TableFlow {
}
// As tables are always wrapped inside a table wrapper, they are never impacted by floats.
self.block_flow.base.flags.set_impacted_by_left_floats(false);
self.block_flow.base.flags.set_impacted_by_right_floats(false);
self.block_flow.base.flags.remove(IMPACTED_BY_LEFT_FLOATS);
self.block_flow.base.flags.remove(IMPACTED_BY_RIGHT_FLOATS);
self.block_flow.propagate_assigned_inline_size_to_children(
inline_start_content_edge,

5
components/layout/table_wrapper.rs
View file

@ -19,6 +19,7 @@ use construct::FlowConstructor;
use context::LayoutContext;
use floats::FloatKind;
use flow::{TableWrapperFlowClass, FlowClass, Flow, ImmutableFlowUtils};
use flow::{IMPACTED_BY_LEFT_FLOATS, IMPACTED_BY_RIGHT_FLOATS};
use fragment::{Fragment, FragmentBoundsIterator};
use table::ColumnInlineSize;
use wrapper::ThreadSafeLayoutNode;
@ -260,8 +261,8 @@ impl Flow for TableWrapperFlow {
// Table wrappers are essentially block formatting contexts and are therefore never
// impacted by floats.
self.block_flow.base.flags.set_impacted_by_left_floats(false);
self.block_flow.base.flags.set_impacted_by_right_floats(false);
self.block_flow.base.flags.remove(IMPACTED_BY_LEFT_FLOATS);
self.block_flow.base.flags.remove(IMPACTED_BY_RIGHT_FLOATS);
// Our inline-size was set to the inline-size of the containing block by the flow's parent.
// Now compute the real value.

1
components/plugins/lib.rs
View file

@ -35,7 +35,6 @@ use syntax::parse::token::intern;
pub mod jstraceable;
pub mod lints;
mod macros;
#[plugin_registrar]
pub fn plugin_registrar(reg: &mut Registry) {
reg.register_syntax_extension(intern("dom_struct"), Modifier(box jstraceable::expand_dom_struct));

22
components/plugins/macros.rs
View file

@ -1,22 +0,0 @@
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#[macro_export]
macro_rules! bitfield(
($bitfieldname:ident, $getter:ident, $setter:ident, $value:expr) => (
impl $bitfieldname {
#[inline]
pub fn $getter(self) -> bool {
let $bitfieldname(this) = self;
(this & $value) != 0
}
#[inline]
pub fn $setter(&mut self, value: bool) {
let $bitfieldname(this) = *self;
*self = $bitfieldname((this & !$value) | (if value { $value } else { 0 }))
}
}
)
)