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cd8f96cc9e
This more concrete wrapper type can write a prefix the very first time something is written to it. This allows removing plenty of useless monomorphisations caused by the former W/SequenceWriter<W> pair of types.
125 lines
3.6 KiB
Rust
125 lines
3.6 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! The [`@import`][import] at-rule.
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//!
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//! [import]: https://drafts.csswg.org/css-cascade-3/#at-import
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use cssparser::SourceLocation;
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use media_queries::MediaList;
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use shared_lock::{DeepCloneWithLock, DeepCloneParams, SharedRwLock, SharedRwLockReadGuard, ToCssWithGuard};
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use std::fmt::{self, Write};
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use str::CssStringWriter;
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use style_traits::{CssWriter, ToCss};
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use stylesheets::{StylesheetContents, StylesheetInDocument};
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use values::specified::url::SpecifiedUrl;
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/// A sheet that is held from an import rule.
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#[cfg(feature = "gecko")]
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#[derive(Debug)]
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pub struct ImportSheet(pub ::gecko::data::GeckoStyleSheet);
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#[cfg(feature = "gecko")]
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impl DeepCloneWithLock for ImportSheet {
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fn deep_clone_with_lock(
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&self,
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_lock: &SharedRwLock,
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_guard: &SharedRwLockReadGuard,
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params: &DeepCloneParams,
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) -> Self {
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use gecko::data::GeckoStyleSheet;
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use gecko_bindings::bindings;
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let clone = unsafe {
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bindings::Gecko_StyleSheet_Clone(
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self.0.raw() as *const _,
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params.reference_sheet
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)
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};
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ImportSheet(unsafe { GeckoStyleSheet::from_addrefed(clone) })
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}
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}
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/// A sheet that is held from an import rule.
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#[cfg(feature = "servo")]
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#[derive(Debug)]
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pub struct ImportSheet(pub ::servo_arc::Arc<::stylesheets::Stylesheet>);
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impl StylesheetInDocument for ImportSheet {
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/// Get the media associated with this stylesheet.
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fn media<'a>(&'a self, guard: &'a SharedRwLockReadGuard) -> Option<&'a MediaList> {
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self.0.media(guard)
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}
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fn contents(&self, guard: &SharedRwLockReadGuard) -> &StylesheetContents {
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self.0.contents(guard)
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}
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fn enabled(&self) -> bool {
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self.0.enabled()
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}
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}
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#[cfg(feature = "servo")]
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impl DeepCloneWithLock for ImportSheet {
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fn deep_clone_with_lock(
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&self,
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_lock: &SharedRwLock,
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_guard: &SharedRwLockReadGuard,
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_params: &DeepCloneParams,
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) -> Self {
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use servo_arc::Arc;
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ImportSheet(Arc::new((&*self.0).clone()))
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}
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}
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/// The [`@import`][import] at-rule.
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///
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/// [import]: https://drafts.csswg.org/css-cascade-3/#at-import
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#[derive(Debug)]
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pub struct ImportRule {
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/// The `<url>` this `@import` rule is loading.
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pub url: SpecifiedUrl,
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/// The stylesheet is always present.
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///
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/// It contains an empty list of rules and namespace set that is updated
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/// when it loads.
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pub stylesheet: ImportSheet,
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/// The line and column of the rule's source code.
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pub source_location: SourceLocation,
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}
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impl DeepCloneWithLock for ImportRule {
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fn deep_clone_with_lock(
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&self,
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lock: &SharedRwLock,
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guard: &SharedRwLockReadGuard,
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params: &DeepCloneParams,
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) -> Self {
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ImportRule {
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url: self.url.clone(),
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stylesheet: self.stylesheet.deep_clone_with_lock(lock, guard, params),
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source_location: self.source_location.clone(),
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}
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}
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}
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impl ToCssWithGuard for ImportRule {
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fn to_css(&self, guard: &SharedRwLockReadGuard, dest: &mut CssStringWriter) -> fmt::Result {
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dest.write_str("@import ")?;
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self.url.to_css(&mut CssWriter::new(dest))?;
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match self.stylesheet.media(guard) {
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Some(media) if !media.is_empty() => {
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dest.write_str(" ")?;
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media.to_css(&mut CssWriter::new(dest))?;
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}
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_ => {},
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};
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dest.write_str(";")
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}
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}
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