servo/components/script/dom/cssimportrule.rs

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

use dom::bindings::codegen::Bindings::CSSImportRuleBinding;
use dom::bindings::js::Root;
use dom::bindings::reflector::reflect_dom_object;
use dom::bindings::str::DOMString;
use dom::cssrule::{CSSRule, SpecificCSSRule};
use dom::cssstylesheet::CSSStyleSheet;
use dom::window::Window;
use dom_struct::dom_struct;
use style::shared_lock::{Locked, ToCssWithGuard};
use style::stylearc::Arc;
use style::stylesheets::ImportRule;

#[dom_struct]
pub struct CSSImportRule {
    cssrule: CSSRule,
    #[ignore_heap_size_of = "Arc"]
    import_rule: Arc<Locked<ImportRule>>,
}

impl CSSImportRule {
    fn new_inherited(parent_stylesheet: &CSSStyleSheet,
                     import_rule: Arc<Locked<ImportRule>>)
                     -> Self {
        CSSImportRule {
            cssrule: CSSRule::new_inherited(parent_stylesheet),
            import_rule: import_rule,
        }
    }

    #[allow(unrooted_must_root)]
    pub fn new(window: &Window,
               parent_stylesheet: &CSSStyleSheet,
               import_rule: Arc<Locked<ImportRule>>) -> Root<Self> {
        reflect_dom_object(box Self::new_inherited(parent_stylesheet, import_rule),
                           window,
                           CSSImportRuleBinding::Wrap)
    }
}

impl SpecificCSSRule for CSSImportRule {
    fn ty(&self) -> u16 {
        use dom::bindings::codegen::Bindings::CSSRuleBinding::CSSRuleConstants;
        CSSRuleConstants::IMPORT_RULE
    }

    fn get_css(&self) -> DOMString {
        let guard = self.cssrule.shared_lock().read();
        self.import_rule.read_with(&guard).to_css_string(&guard).into()
    }
}