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layout: Implement partial support for inline absolute containing blocks.

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Improves the position of the down arrows on google.com SERPs.
This commit is contained in:
Patrick Walton 2015-08-31 18:56:52 -07:00
parent 9f85370885
commit 676f7014e8
7 changed files with 145 additions and 35 deletions
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27
components/layout/inline.rs
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@ -1277,7 +1277,7 @@ impl InlineFlow {
}
fn containing_block_range_for_flow(&self, opaque_flow: OpaqueFlow) -> Range<FragmentIndex> {
let index = FragmentIndex(self.fragments.fragments.iter().position(|fragment| {
match self.fragments.fragments.iter().position(|fragment| {
match fragment.specific {
SpecificFragmentInfo::InlineAbsolute(ref inline_absolute) => {
OpaqueFlow::from_flow(&*inline_absolute.flow_ref) == opaque_flow
@ -1288,9 +1288,19 @@ impl InlineFlow {
}
_ => false,
}
}).expect("containing_block_range_for_flow(): couldn't find inline absolute fragment!")
as isize);
self.containing_block_range_for_flow_surrounding_fragment_at_index(index)
}) {
Some(index) => {
let index = FragmentIndex(index as isize);
self.containing_block_range_for_flow_surrounding_fragment_at_index(index)
}
None => {
// FIXME(pcwalton): This is quite wrong. We should only return the range
// surrounding the inline fragments that constitute the containing block. But this
// suffices to get Google looking right.
Range::new(FragmentIndex(0),
FragmentIndex(self.fragments.fragments.len() as isize))
}
}
}
}
@ -1762,9 +1772,7 @@ impl Flow for InlineFlow {
}
fn contains_positioned_fragments(&self) -> bool {
self.fragments.fragments.iter().any(|fragment| {
fragment.style.get_box().position != position::T::static_
})
self.fragments.fragments.iter().any(|fragment| fragment.is_positioned())
}
fn contains_relatively_positioned_fragments(&self) -> bool {
@ -1777,10 +1785,13 @@ impl Flow for InlineFlow {
let mut containing_block_size = LogicalSize::new(self.base.writing_mode, Au(0), Au(0));
for index in self.containing_block_range_for_flow(for_flow).each_index() {
let fragment = &self.fragments.fragments[index.get() as usize];
if fragment.is_absolutely_positioned() {
continue
}
containing_block_size.inline = containing_block_size.inline +
fragment.border_box.size.inline;
containing_block_size.block = max(containing_block_size.block,
fragment.border_box.size.block)
fragment.border_box.size.block);
}
containing_block_size
}