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layout: Allow inline elements to be containing blocks for

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absolutely-positioned elements.

This also implements a little bit of the infrastructure needed to
support for fragmentation via support for multiple positioned fragments
in one flow.

Improves Google.
This commit is contained in:
Patrick Walton 2015-04-30 16:44:59 -07:00
parent b3b9deafa7
commit 1f0b5889da
19 changed files with 592 additions and 241 deletions
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20
components/layout/display_list_builder.rs
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@ -1001,7 +1001,8 @@ impl FragmentDisplayListBuilding for Fragment {
SpecificFragmentInfo::TableRow |
SpecificFragmentInfo::TableWrapper |
SpecificFragmentInfo::InlineBlock(_) |
SpecificFragmentInfo::InlineAbsoluteHypothetical(_) => {
SpecificFragmentInfo::InlineAbsoluteHypothetical(_) |
SpecificFragmentInfo::InlineAbsolute(_) => {
if opts::get().show_debug_fragment_borders {
self.build_debug_borders_around_fragment(display_list,
stacking_relative_border_box,
@ -1364,8 +1365,10 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
background_border_level);
self.base.display_list_building_result = if self.fragment.establishes_stacking_context() {
DisplayListBuildingResult::StackingContext(
self.fragment.create_stacking_context(&self.base, display_list, None))
DisplayListBuildingResult::StackingContext(self.fragment.create_stacking_context(
&self.base,
display_list,
None))
} else {
match self.fragment.style.get_box().position {
position::T::static_ => {}
@ -1391,8 +1394,10 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
!self.base.flags.contains(NEEDS_LAYER) {
// We didn't need a layer.
self.base.display_list_building_result =
DisplayListBuildingResult::StackingContext(
self.fragment.create_stacking_context(&self.base, display_list, None));
DisplayListBuildingResult::StackingContext(self.fragment.create_stacking_context(
&self.base,
display_list,
None));
return
}
@ -1492,6 +1497,11 @@ impl InlineFlowDisplayListBuilding for InlineFlow {
flow::mut_base(block_flow).display_list_building_result
.add_to(&mut *display_list)
}
SpecificFragmentInfo::InlineAbsolute(ref mut block_flow) => {
let block_flow = &mut *block_flow.flow_ref;
flow::mut_base(block_flow).display_list_building_result
.add_to(&mut *display_list)
}
_ => {}
}
}