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style: Fix font loading invalidation to account for metrics coming from the parent style.

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We were only looking at the given frame's style, which is not
sufficient for this case.

Differential Revision: https://phabricator.services.mozilla.com/D96237
This commit is contained in:
Emilio Cobos Álvarez 2020-11-06 22:30:28 +00:00
parent bdbe8fde42
commit 42abdb99c4
2 changed files with 18 additions and 13 deletions
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12
components/style/values/specified/length.rs
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@ -161,6 +161,10 @@ impl FontRelativeLength {
}
let reference_font_size = base_size.resolve(context);
let font_metrics_flag = match base_size {
FontBaseSize::CurrentStyle => ComputedValueFlags::DEPENDS_ON_SELF_FONT_METRICS,
FontBaseSize::InheritedStyle => ComputedValueFlags::DEPENDS_ON_INHERITED_FONT_METRICS,
};
match *self {
FontRelativeLength::Em(length) => {
if context.for_non_inherited_property.is_some() {
@ -178,9 +182,7 @@ impl FontRelativeLength {
if context.for_non_inherited_property.is_some() {
context.rule_cache_conditions.borrow_mut().set_uncacheable();
}
context
.builder
.add_flags(ComputedValueFlags::DEPENDS_ON_FONT_METRICS);
context.builder.add_flags(font_metrics_flag);
// The x-height is an intrinsically horizontal metric.
let metrics =
query_font_metrics(context, base_size, FontMetricsOrientation::Horizontal);
@ -199,9 +201,7 @@ impl FontRelativeLength {
if context.for_non_inherited_property.is_some() {
context.rule_cache_conditions.borrow_mut().set_uncacheable();
}
context
.builder
.add_flags(ComputedValueFlags::DEPENDS_ON_FONT_METRICS);
context.builder.add_flags(font_metrics_flag);
// https://drafts.csswg.org/css-values/#ch:
//
// Equal to the used advance measure of the “0” (ZERO,