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style: Move root font size handling outside of the cascade.

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And merge it with the rest of the code handling root font-size changes.

MozReview-Commit-ID: 3rW1C3mXiMd
This commit is contained in:
Emilio Cobos Álvarez 2017-07-07 20:27:42 +02:00
parent 1425ad1bab
commit 5d03ba3cbe
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2 changed files with 8 additions and 10 deletions
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12
components/style/matching.rs
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@ -341,7 +341,6 @@ trait PrivateMatchMethods: TElement {
if self.is_native_anonymous() || cascade_target == CascadeTarget::EagerPseudo {
cascade_flags.insert(PROHIBIT_DISPLAY_CONTENTS);
} else if self.is_root() {
debug_assert!(self.owner_doc_matches_for_testing(shared_context.stylist.device()));
cascade_flags.insert(IS_ROOT_ELEMENT);
}
@ -563,9 +562,14 @@ trait PrivateMatchMethods: TElement {
// If the root font-size changed since last time, and something
// in the document did use rem units, ensure we recascade the
// entire tree.
if old_values.map_or(false, |v| v.get_font().clone_font_size() != new_font_size) &&
device.used_root_font_size() {
child_cascade_requirement = ChildCascadeRequirement::MustCascadeDescendants;
if old_values.map_or(true, |v| v.get_font().clone_font_size() != new_font_size) {
// FIXME(emilio): This can fire when called from a document
// from the bfcache (bug 1376897).
debug_assert!(self.owner_doc_matches_for_testing(device));
device.set_root_font_size(new_font_size);
if device.used_root_font_size() {
child_cascade_requirement = ChildCascadeRequirement::MustCascadeDescendants;
}
}
}
}