Auto merge of #18212 - mrobinson:position-sticky, r=emilio

Add support for position:sticky

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.

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- [ ] These changes fix #__ (github issue number if applicable).

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This commit is contained in:
bors-servo 2017-09-05 15:36:47 -05:00 committed by GitHub
commit f1fab036ab
84 changed files with 5729 additions and 50 deletions

View file

@ -93,7 +93,7 @@ pub fn iterate_through_flow_tree_fragment_border_boxes(root: &mut Flow, iterator
flow::base(kid).stacking_relative_position +
stacking_context_position.to_vector();
let relative_position = kid.as_block()
.stacking_relative_position(CoordinateSystem::Own);
.stacking_relative_border_box(CoordinateSystem::Own);
if let Some(matrix) = kid.as_block()
.fragment
.transform_matrix(&relative_position) {