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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
No known key found for this signature in database
GPG key ID: 056B727BB9C1027C
7 changed files with 152 additions and 71 deletions
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31
components/style/gecko/data.rs
View file

@ -5,6 +5,7 @@
//! Data needed to style a Gecko document.
use atomic_refcell::{AtomicRef, AtomicRefCell, AtomicRefMut};
use context::QuirksMode;
use dom::TElement;
use gecko_bindings::bindings::{self, RawServoStyleSet};
use gecko_bindings::structs::{self, RawGeckoPresContextOwned, ServoStyleSetSizes, ServoStyleSheet};
@ -17,7 +18,7 @@ use properties::ComputedValues;
use selector_parser::SnapshotMap;
use servo_arc::Arc;
use shared_lock::{Locked, SharedRwLockReadGuard, StylesheetGuards};
use stylesheets::{StylesheetContents, StylesheetInDocument};
use stylesheets::{CssRule, Origin, StylesheetContents, StylesheetInDocument};
use stylist::Stylist;
/// Little wrapper to a Gecko style sheet.
@ -58,6 +59,16 @@ impl GeckoStyleSheet {
&*(self.raw()._base.mInner as *const StyleSheetInfo as *const ServoStyleSheetInner)
}
}
/// Gets the StylesheetContents for this stylesheet.
pub fn contents(&self) -> &StylesheetContents {
debug_assert!(!self.inner().mContents.mRawPtr.is_null());
unsafe {
let contents =
(&**StylesheetContents::as_arc(&&*self.inner().mContents.mRawPtr)) as *const _;
&*contents
}
}
}
impl Drop for GeckoStyleSheet {
@ -74,13 +85,12 @@ impl Clone for GeckoStyleSheet {
}
impl StylesheetInDocument for GeckoStyleSheet {
fn contents(&self, _: &SharedRwLockReadGuard) -> &StylesheetContents {
debug_assert!(!self.inner().mContents.mRawPtr.is_null());
unsafe {
let contents =
(&**StylesheetContents::as_arc(&&*self.inner().mContents.mRawPtr)) as *const _;
&*contents
}
fn origin(&self, _guard: &SharedRwLockReadGuard) -> Origin {
self.contents().origin
}
fn quirks_mode(&self, _guard: &SharedRwLockReadGuard) -> QuirksMode {
self.contents().quirks_mode
}
fn media<'a>(&'a self, guard: &'a SharedRwLockReadGuard) -> Option<&'a MediaList> {
@ -103,6 +113,11 @@ impl StylesheetInDocument for GeckoStyleSheet {
fn enabled(&self) -> bool {
true
}
#[inline]
fn rules<'a, 'b: 'a>(&'a self, guard: &'b SharedRwLockReadGuard) -> &'a [CssRule] {
self.contents().rules(guard)
}
}
/// The container for data that a Servo-backed Gecko document needs to style