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layout: Clip the immediate fragments of block flows that establish

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stacking contexts properly.

The code that existed before correctly translated the clips of child
elements, but not those of immediate display items belonging to the flow
itself.

Makes Leaflet.js maps usable.
This commit is contained in:
Patrick Walton 2015-04-15 17:04:57 -07:00
parent 045831748e
commit 14a544b64c
4 changed files with 90 additions and 1 deletions
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7
components/layout/display_list_builder.rs
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@ -1253,6 +1253,11 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
layout_context: &LayoutContext,
background_border_level: BackgroundAndBorderLevel) {
// Add the box that starts the block context.
let clip = if self.fragment.establishes_stacking_context() {
self.base.clip.translate(&-self.base.stacking_relative_position)
} else {
self.base.clip.clone()
};
self.fragment.build_display_list(display_list,
layout_context,
&self.base.stacking_relative_position,
@ -1263,7 +1268,7 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
.absolute_position_info
.relative_containing_block_mode,
background_border_level,
&self.base.clip);
&clip);
// Add children.
for kid in self.base.children.iter_mut() {