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script: When using WebRender, keep the DOM-side scroll positions for

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elements with `overflow: scroll` up to date, and take them into account
when doing hit testing.

Closes #11648.
This commit is contained in:
Patrick Walton 2016-06-08 18:46:02 -07:00
parent ce88b8ed30
commit 041cfe6d0a
14 changed files with 259 additions and 47 deletions
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13
components/layout/display_list_builder.rs
View file

@ -1686,13 +1686,18 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
return parent_id;
}
let stacking_context_id =
let has_scrolling_overflow = self.has_scrolling_overflow();
let stacking_context_id = if has_scrolling_overflow {
StackingContextId::new_outer(self.fragment.fragment_type())
} else {
StackingContextId::new_of_type(self.fragment.node.id() as usize,
self.fragment.fragment_type());
self.fragment.fragment_type())
};
self.base.stacking_context_id = stacking_context_id;
let inner_stacking_context_id = if self.has_scrolling_overflow() {
StackingContextId::new_of_type(self.base.flow_id(), self.fragment.fragment_type())
let inner_stacking_context_id = if has_scrolling_overflow {
StackingContextId::new_of_type(self.fragment.node.id() as usize,
self.fragment.fragment_type())
} else {
stacking_context_id
};