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Add support for position:sticky

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This leverages the position:sticky support in WebRender to bring basic
support for position:sticky in Servo. There are still some issues with
nested sticky flows as well as a few other corner cases. Tests are
imported from WPT and can be removed once we update to the latest
version.
This commit is contained in:
Martin Robinson 2017-08-24 09:37:49 +02:00
parent 4725a05bfb
commit bc455c8a1f
84 changed files with 5729 additions and 50 deletions
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6
components/layout/webrender_helpers.rs
View file

@ -493,10 +493,11 @@ impl WebRenderDisplayItemConverter for DisplayItem {
builder.push_clip_id(item.scroll_root.parent_id);
let our_id = item.scroll_root.id;
let item_rect = item.scroll_root.clip.main.to_rectf();
let webrender_id = match item.scroll_root.root_type {
ScrollRootType::Clip => {
builder.define_clip(Some(our_id),
item.scroll_root.clip.main.to_rectf(),
item_rect,
item.scroll_root.clip.get_complex_clips(),
None)
}
@ -508,6 +509,9 @@ impl WebRenderDisplayItemConverter for DisplayItem {
None,
scroll_sensitivity)
}
ScrollRootType::StickyFrame(sticky_frame_info) => {
builder.define_sticky_frame(Some(our_id), item_rect, sticky_frame_info)
}
};
debug_assert!(our_id == webrender_id);