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style: Factor out whether a stylesheet matches all the existing medium-affected-values in CascadeData.

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MozReview-Commit-ID: IE6RFiBXZ8s
Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
This commit is contained in:
Emilio Cobos Álvarez 2017-09-14 16:19:16 +02:00
parent 49f753523a
commit 985c6193eb
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GPG key ID: 056B727BB9C1027C
1 changed files with 97 additions and 84 deletions
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181
components/style/stylist.rs
View file

@ -963,107 +963,33 @@ impl Stylist {
&self,
guards: &StylesheetGuards,
) -> OriginSet {
use invalidation::media_queries::PotentiallyEffectiveMediaRules;
debug!("Stylist::media_features_change_changed_style");
let mut origins = OriginSet::empty();
let stylesheets = self.stylesheets.iter();
'stylesheets_loop: for (stylesheet, origin) in stylesheets {
let guard = guards.for_origin(origin);
let effective_now =
stylesheet.is_effective_for_device(&self.device, guard);
for (stylesheet, origin) in stylesheets {
if origins.contains(origin.into()) {
continue;
}
let guard = guards.for_origin(origin);
let origin_cascade_data =
self.cascade_data.per_origin.borrow_for_origin(&origin);
let effective_then =
origin_cascade_data
.effective_media_query_results
.was_effective(stylesheet);
let affected_changed = !origin_cascade_data.media_feature_affected_matches(
stylesheet,
guard,
&self.device,
self.quirks_mode
);
if effective_now != effective_then {
debug!(" > Stylesheet changed -> {}, {}",
effective_then, effective_now);
if affected_changed {
origins |= origin;
continue;
}
if !effective_now {
continue;
}
let mut iter =
stylesheet.iter_rules::<PotentiallyEffectiveMediaRules>(
&self.device,
guard
);
while let Some(rule) = iter.next() {
match *rule {
CssRule::Style(..) |
CssRule::Namespace(..) |
CssRule::FontFace(..) |
CssRule::CounterStyle(..) |
CssRule::Supports(..) |
CssRule::Keyframes(..) |
CssRule::Page(..) |
CssRule::Viewport(..) |
CssRule::Document(..) |
CssRule::FontFeatureValues(..) => {
// Not affected by device changes.
continue;
}
CssRule::Import(ref lock) => {
let import_rule = lock.read_with(guard);
let effective_now =
import_rule.stylesheet
.is_effective_for_device(&self.device, guard);
let effective_then =
origin_cascade_data
.effective_media_query_results
.was_effective(import_rule);
if effective_now != effective_then {
debug!(" > @import rule changed {} -> {}",
effective_then, effective_now);
origins |= origin;
continue 'stylesheets_loop;
}
if !effective_now {
iter.skip_children();
}
}
CssRule::Media(ref lock) => {
let media_rule = lock.read_with(guard);
let mq = media_rule.media_queries.read_with(guard);
let effective_now =
mq.evaluate(&self.device, self.quirks_mode);
let effective_then =
origin_cascade_data
.effective_media_query_results
.was_effective(media_rule);
if effective_now != effective_then {
debug!(" > @media rule changed {} -> {}",
effective_then, effective_now);
origins |= origin;
continue 'stylesheets_loop;
}
if !effective_now {
iter.skip_children();
}
}
}
}
}
return origins
origins
}
/// Returns the viewport constraints that apply to this document because of
@ -1943,6 +1869,93 @@ impl CascadeData {
Ok(())
}
/// Returns whether all the media-feature affected values matched before and
/// match now in the given stylesheet.
fn media_feature_affected_matches<S>(
&self,
stylesheet: &S,
guard: &SharedRwLockReadGuard,
device: &Device,
quirks_mode: QuirksMode,
) -> bool
where
S: StylesheetInDocument + ToMediaListKey + 'static,
{
use invalidation::media_queries::PotentiallyEffectiveMediaRules;
let effective_now =
stylesheet.is_effective_for_device(device, guard);
let effective_then =
self.effective_media_query_results.was_effective(stylesheet);
if effective_now != effective_then {
debug!(" > Stylesheet changed -> {}, {}",
effective_then, effective_now);
return false;
}
if !effective_now {
return true;
}
let mut iter =
stylesheet.iter_rules::<PotentiallyEffectiveMediaRules>(device, guard);
while let Some(rule) = iter.next() {
match *rule {
CssRule::Style(..) |
CssRule::Namespace(..) |
CssRule::FontFace(..) |
CssRule::CounterStyle(..) |
CssRule::Supports(..) |
CssRule::Keyframes(..) |
CssRule::Page(..) |
CssRule::Viewport(..) |
CssRule::Document(..) |
CssRule::FontFeatureValues(..) => {
// Not affected by device changes.
continue;
}
CssRule::Import(ref lock) => {
let import_rule = lock.read_with(guard);
let effective_now =
import_rule.stylesheet
.is_effective_for_device(&device, guard);
let effective_then =
self.effective_media_query_results.was_effective(import_rule);
if effective_now != effective_then {
debug!(" > @import rule changed {} -> {}",
effective_then, effective_now);
return false;
}
if !effective_now {
iter.skip_children();
}
}
CssRule::Media(ref lock) => {
let media_rule = lock.read_with(guard);
let mq = media_rule.media_queries.read_with(guard);
let effective_now = mq.evaluate(device, quirks_mode);
let effective_then =
self.effective_media_query_results.was_effective(media_rule);
if effective_now != effective_then {
debug!(" > @media rule changed {} -> {}",
effective_then, effective_now);
return false;
}
if !effective_now {
iter.skip_children();
}
}
}
}
true
}
#[inline]
fn borrow_for_pseudo(&self, pseudo: Option<&PseudoElement>) -> Option<&SelectorMap<Rule>> {