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style: Allow placeholder import sheets.

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This is necessary because we can't create GeckoStyleSheets off-main-thread,
so we need a placeholder until it can be filled in.

Bug: 1454030
Reviewed-by: emilio
MozReview-Commit-ID: ssRme4fLYg
This commit is contained in:
Bobby Holley 2018-02-20 15:52:13 -08:00 • committed by Emilio Cobos Álvarez
parent 441f1cd231
commit afe484e46b
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GPG key ID: 056B727BB9C1027C
7 changed files with 152 additions and 71 deletions
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12
components/style/stylesheets/rules_iterator.rs
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@ -9,8 +9,9 @@ use media_queries::Device;
use shared_lock::SharedRwLockReadGuard;
use smallvec::SmallVec;
use std::slice;
use stylesheets::{CssRule, CssRules, DocumentRule, ImportRule, MediaRule, SupportsRule};
use stylesheets::{CssRule, DocumentRule, ImportRule, MediaRule, SupportsRule};
use stylesheets::StylesheetInDocument;
use stylesheets::import_rule::ImportSheet;
/// An iterator over a list of rules.
pub struct RulesIterator<'a, 'b, C>
@ -35,10 +36,10 @@ where
device: &'a Device,
quirks_mode: QuirksMode,
guard: &'a SharedRwLockReadGuard<'b>,
rules: &'a CssRules,
rules: &'a [CssRule],
) -> Self {
let mut stack = SmallVec::new();
stack.push(rules.0.iter());
stack.push(rules.iter());
Self {
device: device,
quirks_mode: quirks_mode,
@ -102,10 +103,7 @@ where
}
import_rule
.stylesheet
.contents(self.guard)
.rules
.read_with(self.guard)
.0
.rules(self.guard)
.iter()
},
CssRule::Document(ref doc_rule) => {