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layout: Make the stacking context take into account the children transform when calculating overflow areas.

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This only works for simple translations and similar, but I want Patrick to
validate my approach.
This commit is contained in:
Emilio Cobos Álvarez 2016-08-13 02:36:17 -07:00
parent 49431be44a
commit fd3a99ead3
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GPG key ID: 056B727BB9C1027C
5 changed files with 85 additions and 32 deletions
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8
components/layout/display_list_builder.rs
View file

@ -1729,7 +1729,7 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
}
}
contexts[stacking_context_index].children = floating;
contexts[stacking_context_index].set_children(floating);
return stacking_context_id;
}
@ -1745,14 +1745,14 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
&self.base,
scroll_policy,
StackingContextCreationMode::InnerScrollWrapper);
inner_stacking_context.children = child_contexts;
inner_stacking_context.set_children(child_contexts);
let mut outer_stacking_context = self.fragment.create_stacking_context(
stacking_context_id,
&self.base,
scroll_policy,
StackingContextCreationMode::OuterScrollWrapper);
outer_stacking_context.children.push(inner_stacking_context);
outer_stacking_context.add_child(inner_stacking_context);
outer_stacking_context
} else {
let mut stacking_context = self.fragment.create_stacking_context(
@ -1760,7 +1760,7 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
&self.base,
scroll_policy,
StackingContextCreationMode::Normal);
stacking_context.children = child_contexts;
stacking_context.set_children(child_contexts);
stacking_context
};

4
components/layout/sequential.rs
View file

@ -84,8 +84,10 @@ pub fn build_display_list_for_subtree(root: &mut FlowRef,
let flow_root = flow_ref::deref_mut(root);
let layout_context = LayoutContext::new(shared_layout_context);
flow_root.traverse_preorder(&ComputeAbsolutePositions { layout_context: &layout_context });
let mut children = vec![];
flow_root.collect_stacking_contexts(root_stacking_context.id,
&mut root_stacking_context.children);
&mut children);
root_stacking_context.add_children(children);
let mut build_display_list = BuildDisplayList {
state: DisplayListBuildState::new(&layout_context,
flow::base(&*flow_root).stacking_context_id),

2
components/layout/webrender_helpers.rs
View file

@ -260,7 +260,7 @@ impl WebRenderStackingContextConverter for StackingContext {
builder: &mut webrender_traits::DisplayListBuilder,
frame_builder: &mut WebRenderFrameBuilder,
_force_positioned_stacking_level: bool) {
for child in self.children.iter() {
for child in self.children() {
while let Some(item) = traversal.advance(self) {
item.convert_to_webrender(builder, frame_builder);
}