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stylo: only clear relevant origins when medium features change.

Browse source 
Bug: 1389871
Reviewed-by: heycam
MozReview-Commit-ID: 6ocZc1u1TbU
This commit is contained in:
Emilio Cobos Álvarez 2017-08-14 10:38:15 +02:00
parent f7eb46f484
commit fd3d38326c
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GPG key ID: 056B727BB9C1027C
2 changed files with 26 additions and 15 deletions
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28
components/style/stylist.rs
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@ -40,7 +40,7 @@ use style_traits::viewport::ViewportConstraints;
#[cfg(feature = "gecko")]
use stylesheets::{CounterStyleRule, FontFaceRule};
use stylesheets::{CssRule, StyleRule};
use stylesheets::{StylesheetInDocument, Origin, PerOrigin, PerOriginClear};
use stylesheets::{StylesheetInDocument, Origin, OriginSet, PerOrigin, PerOriginClear};
use stylesheets::UserAgentStylesheets;
use stylesheets::keyframes_rule::KeyframesAnimation;
use stylesheets::viewport_rule::{self, MaybeNew, ViewportRule};
@ -977,16 +977,16 @@ impl Stylist {
stylesheets.iter().map(|s| &**s),
guard
);
self.is_device_dirty |= features_changed;
self.is_device_dirty |= !features_changed.is_empty();
}
/// Returns whether, given a media feature change, any previously-applicable
/// style has become non-applicable, or vice-versa.
/// style has become non-applicable, or vice-versa for each origin.
pub fn media_features_change_changed_style<'a, I, S>(
&self,
stylesheets: I,
guard: &SharedRwLockReadGuard,
) -> bool
) -> OriginSet
where
I: Iterator<Item = &'a S>,
S: StylesheetInDocument + ToMediaListKey + 'static,
@ -995,11 +995,18 @@ impl Stylist {
debug!("Stylist::media_features_change_changed_style");
for stylesheet in stylesheets {
let mut origins = OriginSet::empty();
'stylesheets_loop: for stylesheet in stylesheets {
let effective_now =
stylesheet.is_effective_for_device(&self.device, guard);
let origin = stylesheet.origin(guard);
if origins.contains(origin.into()) {
continue;
}
let origin_cascade_data =
self.cascade_data.borrow_for_origin(&origin);
@ -1011,7 +1018,8 @@ impl Stylist {
if effective_now != effective_then {
debug!(" > Stylesheet changed -> {}, {}",
effective_then, effective_now);
return true
origins |= origin;
continue;
}
if !effective_now {
@ -1051,7 +1059,8 @@ impl Stylist {
if effective_now != effective_then {
debug!(" > @import rule changed {} -> {}",
effective_then, effective_now);
return true;
origins |= origin;
continue 'stylesheets_loop;
}
if !effective_now {
@ -1070,7 +1079,8 @@ impl Stylist {
if effective_now != effective_then {
debug!(" > @media rule changed {} -> {}",
effective_then, effective_now);
return true;
origins |= origin;
continue 'stylesheets_loop;
}
if !effective_now {
@ -1081,7 +1091,7 @@ impl Stylist {
}
}
return false;
return origins
}
/// Returns the viewport constraints that apply to this document because of