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layout: Stop in-order on children of InlineFlow

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No need to do in-order traversal for children of InlineFlow, since
they are either inline-block or absolutely positioned elements, which
are guaranteed to be block formatting context.
This commit is contained in:
Pu Xingyu 2017-07-13 02:58:24 +08:00
parent 2a575acabe
commit 71fcdf683a
1 changed files with 2 additions and 13 deletions
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15
components/layout/inline.rs
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@ -1420,6 +1420,8 @@ impl Flow for InlineFlow {
}
/// Calculate and set the block-size of this flow. See CSS 2.1 § 10.6.1.
/// Note that we do not need to do in-order traversal becase the children
/// are always block formatting context.
fn assign_block_size(&mut self, layout_context: &LayoutContext) {
let _scope = layout_debug_scope!("inline::assign_block_size {:x}",
self.base.debug_id());
@ -1484,19 +1486,6 @@ impl Flow for InlineFlow {
indentation = Au(0)
}
// Assign block sizes for any inline-block descendants.
let thread_id = self.base.thread_id;
for kid in self.base.child_iter_mut() {
if flow::base(kid).flags.contains(IS_ABSOLUTELY_POSITIONED) ||
flow::base(kid).flags.is_float() {
continue
}
let content_box = flow::base(kid).position;
kid.assign_block_size_for_inorder_child_if_necessary(layout_context,
thread_id,
content_box);
}
if self.contains_positioned_fragments() {
// Assign block-sizes for all flows in this absolute flow tree.
// This is preorder because the block-size of an absolute flow may depend on