Mirrors/servo
1
0
Fork 0
mirror of https://github.com/servo/servo.git synced 2025-08-08 06:55:31 +01:00
Code Issues Projects Releases Packages Wiki Activity

Auto merge of #17211 - Manishearth:stylo-single-generic, r=heycam

Browse source 
stylo: Prefill default font when a single generic is set

r=heycam https://bugzilla.mozilla.org/show_bug.cgi?id=1370734

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/17211)
<!-- Reviewable:end -->
This commit is contained in:
bors-servo 2017-06-07 10:53:25 -07:00 • committed by GitHub
commit eaefcbe551
4 changed files with 113 additions and 35 deletions
Download patch file Download diff file Expand all files Collapse all files

73
components/style/properties/properties.mako.rs
View file

@ -2732,6 +2732,52 @@ pub fn apply_declarations<'a, F, I>(device: &Device,
let writing_mode = get_writing_mode(context.style.get_inheritedbox());
context.style.writing_mode = writing_mode;
let mut _skip_font_family = false;
% if product == "gecko":
// Whenever a single generic value is specified, gecko will do a bunch of
// recalculation walking up the rule tree, including handling the font-size stuff.
// It basically repopulates the font struct with the default font for a given
// generic and language. We handle the font-size stuff separately, so this boils
// down to just copying over the font-family lists (no other aspect of the default
// font can be configured).
if seen.contains(LonghandId::XLang) || font_family.is_some() {
// if just the language changed, the inherited generic is all we need
let mut generic = inherited_style.get_font().gecko().mGenericID;
if let Some(declaration) = font_family {
if let PropertyDeclaration::FontFamily(ref fam) = *declaration {
if let Some(id) = fam.single_generic() {
generic = id;
// In case of a specified font family with a single generic, we will
// end up setting font family below, but its value would get
// overwritten later in the pipeline when cascading.
//
// We instead skip cascading font-family in that case.
//
// In case of the language changing, we wish for a specified font-
// family to override this, so we do not skip cascading then.
_skip_font_family = true;
}
}
}
// In case of just the language changing, the parent could have had no generic,
// which Gecko just does regular cascading with. Do the same.
// This can only happen in the case where the language changed but the family did not
if generic != structs::kGenericFont_NONE {
let pres_context = context.device.pres_context;
let gecko_font = context.mutate_style().mutate_font().gecko_mut();
gecko_font.mGenericID = generic;
unsafe {
bindings::Gecko_nsStyleFont_PrefillDefaultForGeneric(gecko_font,
&*pres_context,
generic);
}
}
}
% endif
// It is important that font_size is computed before
// the late properties (for em units), but after font-family
// (for the base-font-size dependence for default and keyword font-sizes)
@ -2743,18 +2789,21 @@ pub fn apply_declarations<'a, F, I>(device: &Device,
// To avoid an extra iteration, we just pull out the property
// during the early iteration and cascade them in order
// after it.
if let Some(declaration) = font_family {
let discriminant = LonghandId::FontFamily as usize;
(CASCADE_PROPERTY[discriminant])(declaration,
inherited_style,
default_style,
&mut context,
&mut cacheable,
&mut cascade_info,
error_reporter);
% if product == "gecko":
context.style.mutate_font().fixup_none_generic(context.device);
% endif
if !_skip_font_family {
if let Some(declaration) = font_family {
let discriminant = LonghandId::FontFamily as usize;
(CASCADE_PROPERTY[discriminant])(declaration,
inherited_style,
default_style,
&mut context,
&mut cacheable,
&mut cascade_info,
error_reporter);
% if product == "gecko":
context.style.mutate_font().fixup_none_generic(context.device);
% endif
}
}
if let Some(declaration) = font_size {