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Fix percentage height calculation, absolute containing block height calculations.

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It's not possible to correctly determine during the css cascade whether the container height
is explicitly specified. Additionally, the spec https://drafts.csswg.org/css2/visudet.html#the-height-property
says this should affect the *used* height, rather than the computed height.

This significantly improves the layout in #6643.
This commit is contained in:
Glenn Watson 2015-08-03 09:00:46 +10:00
parent ffe4bd25a4
commit b9fea3deb3
10 changed files with 151 additions and 119 deletions
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20
components/layout/flow.rs
View file

@ -1389,7 +1389,7 @@ impl ContainingBlockLink {
}
#[inline]
pub fn generated_containing_block_size(&mut self, for_flow: OpaqueFlow) -> LogicalSize<Au> {
pub fn generated_containing_block_size(&self, for_flow: OpaqueFlow) -> LogicalSize<Au> {
match self.link {
None => {
panic!("Link to containing block not established; perhaps you forgot to call \
@ -1398,6 +1398,24 @@ impl ContainingBlockLink {
Some(ref link) => link.upgrade().unwrap().generated_containing_block_size(for_flow),
}
}
#[inline]
pub fn explicit_block_containing_size(&self, layout_context: &LayoutContext) -> Option<Au> {
match self.link {
None => {
panic!("Link to containing block not established; perhaps you forgot to call \
`set_absolute_descendants`?")
}
Some(ref link) => {
let flow = link.upgrade().unwrap();
if flow.is_block_like() {
flow.as_immutable_block().explicit_block_containing_size(layout_context)
} else {
None
}
}
}
}
}
/// A wrapper for the pointer address of a flow. These pointer addresses may only be compared for