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Auto merge of #7177 - pcwalton:intervening-inline-block, r=mbrubeck
layout: Improve our handling of inline absolute containing blocks. Several issues are addressed in this commit: * Inline flows now bubble up their absolute descendants instead of making the inline flow the containing block for them. (In the future, we will need to make the inline flow *sometimes* be the containing block for them, but for now it improves sites to unconditionally bubble up.) * Fragments now look at their inline fragment context to determine whether they are positioned. * Inline flows now push the stacking-relative position of the absolute containing block down to their inline-block fragments. * Inline absolute hypothetical fragments can be containing blocks. * Fixes the logic in `containing_block_range_for_flow_surrounding_fragment_at_index`. The condition to determine whether fragments are positioned was inverted! * `Descendants`/`AbsDescendants` has been refactored in order to become more friendly to inline absolute containing blocks in the future. Improves the inline position of the green drop-down arrow in the Google SERPs. (The block position is still wrong.) r? @mbrubeck <!-- Reviewable:start --> [<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/7177) <!-- Reviewable:end -->
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commit
d654841288
10 changed files with 236 additions and 93 deletions
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@ -2234,6 +2234,22 @@ impl Fragment {
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pub fn margin_box_inline_size(&self) -> Au {
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self.border_box.size.inline + self.margin.inline_start_end()
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}
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/// Returns true if this node *or any of the nodes within its inline fragment context* have
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/// non-`static` `position`.
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pub fn is_positioned(&self) -> bool {
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if self.style.get_box().position != position::T::static_ {
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return true
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}
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if let Some(ref inline_context) = self.inline_context {
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for node in inline_context.nodes.iter() {
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if node.style.get_box().position != position::T::static_ {
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return true
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}
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}
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}
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false
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}
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}
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impl fmt::Debug for Fragment {
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