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Stop asserting when cached system font changes

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It may change during animation
This commit is contained in:
Manish Goregaokar 2017-07-20 15:06:44 -07:00
parent e19fefcb47
commit 5f7d0436ab
1 changed files with 4 additions and 2 deletions
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6
components/style/properties/longhand/font.mako.rs
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@ -2489,11 +2489,13 @@ ${helpers.single_keyword("-moz-math-variant",
/// Must be called before attempting to compute a system font
/// specified value
pub fn resolve_system_font(system: SystemFont, context: &mut Context) {
if context.cached_system_font.is_none() {
// Checking if context.cached_system_font.is_none() isn't enough,
// if animating from one system font to another the cached system font
// may change
if Some(system) != context.cached_system_font.as_ref().map(|x| x.system_font) {
let computed = system.to_computed_value(context);
context.cached_system_font = Some(computed);
}
debug_assert!(system == context.cached_system_font.as_ref().unwrap().system_font)
}
#[derive(Clone, Debug)]