forked from mirrors/gecko-dev
a498868ba9
Reviewed by @emilio in [bug 1329088](https://bugzilla.mozilla.org/show_bug.cgi?id=1329088). r? @emilio --- - [x] `./mach build -d` does not report any errors - [x] `./mach test-tidy` does not report any errors Source-Repo: https://github.com/servo/servo Source-Revision: 5c56640508b4f24a67fe92c5d3179d89d030e959 --HG-- extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear extra : subtree_revision : 1f33735051b5be8d58a32eec5044f6365b6dab32
85 lines
3.4 KiB
Rust
85 lines
3.4 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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use cssparser::Parser;
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use dom::bindings::codegen::Bindings::CSSSupportsRuleBinding;
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use dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
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use dom::bindings::js::Root;
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use dom::bindings::reflector::{DomObject, reflect_dom_object};
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use dom::bindings::str::DOMString;
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use dom::cssconditionrule::CSSConditionRule;
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use dom::cssrule::SpecificCSSRule;
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use dom::cssstylesheet::CSSStyleSheet;
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use dom::window::Window;
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use dom_struct::dom_struct;
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use std::sync::Arc;
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use style::parser::{LengthParsingMode, ParserContext};
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use style::shared_lock::{Locked, ToCssWithGuard};
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use style::stylesheets::{CssRuleType, SupportsRule};
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use style::supports::SupportsCondition;
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use style_traits::ToCss;
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#[dom_struct]
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pub struct CSSSupportsRule {
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cssconditionrule: CSSConditionRule,
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#[ignore_heap_size_of = "Arc"]
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supportsrule: Arc<Locked<SupportsRule>>,
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}
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impl CSSSupportsRule {
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fn new_inherited(parent_stylesheet: &CSSStyleSheet, supportsrule: Arc<Locked<SupportsRule>>)
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-> CSSSupportsRule {
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let guard = parent_stylesheet.shared_lock().read();
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let list = supportsrule.read_with(&guard).rules.clone();
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CSSSupportsRule {
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cssconditionrule: CSSConditionRule::new_inherited(parent_stylesheet, list),
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supportsrule: supportsrule,
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}
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}
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#[allow(unrooted_must_root)]
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pub fn new(window: &Window, parent_stylesheet: &CSSStyleSheet,
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supportsrule: Arc<Locked<SupportsRule>>) -> Root<CSSSupportsRule> {
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reflect_dom_object(box CSSSupportsRule::new_inherited(parent_stylesheet, supportsrule),
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window,
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CSSSupportsRuleBinding::Wrap)
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}
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/// https://drafts.csswg.org/css-conditional-3/#the-csssupportsrule-interface
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pub fn get_condition_text(&self) -> DOMString {
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let guard = self.cssconditionrule.shared_lock().read();
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let rule = self.supportsrule.read_with(&guard);
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rule.condition.to_css_string().into()
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}
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/// https://drafts.csswg.org/css-conditional-3/#the-csssupportsrule-interface
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pub fn set_condition_text(&self, text: DOMString) {
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let mut input = Parser::new(&text);
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let cond = SupportsCondition::parse(&mut input);
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if let Ok(cond) = cond {
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let global = self.global();
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let win = global.as_window();
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let url = win.Document().url();
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let context = ParserContext::new_for_cssom(&url, win.css_error_reporter(), Some(CssRuleType::Supports),
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LengthParsingMode::Default);
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let enabled = cond.eval(&context);
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let mut guard = self.cssconditionrule.shared_lock().write();
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let rule = self.supportsrule.write_with(&mut guard);
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rule.condition = cond;
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rule.enabled = enabled;
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}
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}
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}
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impl SpecificCSSRule for CSSSupportsRule {
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fn ty(&self) -> u16 {
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use dom::bindings::codegen::Bindings::CSSRuleBinding::CSSRuleConstants;
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CSSRuleConstants::SUPPORTS_RULE
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}
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fn get_css(&self) -> DOMString {
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let guard = self.cssconditionrule.shared_lock().read();
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self.supportsrule.read_with(&guard).to_css_string(&guard).into()
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}
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}
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