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Auto merge of #16695 - Manishearth:kw-inherit, r=heycam

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Do not inherit kw font size if it was not used due to MathML

See https://bugzilla.mozilla.org/show_bug.cgi?id=1361126#c9

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This commit is contained in:
bors-servo 2017-05-02 22:33:15 -05:00 • committed by GitHub
commit fb6015a75b
3 changed files with 15 additions and 5 deletions
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7
components/style/properties/gecko.mako.rs
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@ -1490,8 +1490,10 @@ fn static_assert() {
/// This function will also handle scriptminsize and scriptlevel
/// so should not be called when you just want the font sizes to be copied.
/// Hence the different name.
///
/// Returns true if the inherited keyword size was actually used
pub fn inherit_font_size_from(&mut self, parent: &Self,
kw_inherited_size: Option<Au>) {
kw_inherited_size: Option<Au>) -> bool {
let (adjusted_size, adjusted_unconstrained_size)
= self.calculate_script_level_size(parent);
if adjusted_size.0 != parent.gecko.mSize ||
@ -1513,18 +1515,21 @@ fn static_assert() {
self.gecko.mFont.size = adjusted_size.0;
self.gecko.mSize = adjusted_size.0;
self.gecko.mScriptUnconstrainedSize = adjusted_unconstrained_size.0;
false
} else if let Some(size) = kw_inherited_size {
// Parent element was a keyword-derived size.
self.gecko.mFont.size = size.0;
self.gecko.mSize = size.0;
// MathML constraints didn't apply here, so we can ignore this.
self.gecko.mScriptUnconstrainedSize = size.0;
true
} else {
// MathML isn't affecting us, and our parent element does not
// have a keyword-derived size. Set things normally.
self.gecko.mFont.size = parent.gecko.mFont.size;
self.gecko.mSize = parent.gecko.mSize;
self.gecko.mScriptUnconstrainedSize = parent.gecko.mScriptUnconstrainedSize;
false
}
}