forked from mirrors/gecko-dev
96cfbd09cb
Fixes #8754. Depends on servo/rust-cssparser#99. r? @SimonSapin Source-Repo: https://github.com/servo/servo Source-Revision: a4251c832d605a02d6c82fc188d1746367599e59
116 lines
4.1 KiB
Rust
116 lines
4.1 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 dom::bindings::cell::DOMRefCell;
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use dom::bindings::codegen::Bindings::HTMLMetaElementBinding;
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use dom::bindings::codegen::Bindings::HTMLMetaElementBinding::HTMLMetaElementMethods;
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use dom::bindings::inheritance::Castable;
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use dom::bindings::js::{Root, RootedReference};
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use dom::document::Document;
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use dom::element::Element;
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use dom::htmlelement::HTMLElement;
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use dom::node::{Node, document_from_node};
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use dom::virtualmethods::VirtualMethods;
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use std::ascii::AsciiExt;
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use std::sync::Arc;
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use string_cache::Atom;
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use style::servo::Stylesheet;
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use style::stylesheets::{CSSRule, Origin};
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use style::viewport::ViewportRule;
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use util::str::{DOMString, HTML_SPACE_CHARACTERS};
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#[dom_struct]
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pub struct HTMLMetaElement {
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htmlelement: HTMLElement,
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stylesheet: DOMRefCell<Option<Arc<Stylesheet>>>,
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}
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impl HTMLMetaElement {
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fn new_inherited(localName: Atom,
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prefix: Option<DOMString>,
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document: &Document) -> HTMLMetaElement {
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HTMLMetaElement {
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htmlelement: HTMLElement::new_inherited(localName, prefix, document),
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stylesheet: DOMRefCell::new(None),
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}
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}
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#[allow(unrooted_must_root)]
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pub fn new(localName: Atom,
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prefix: Option<DOMString>,
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document: &Document) -> Root<HTMLMetaElement> {
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let element = HTMLMetaElement::new_inherited(localName, prefix, document);
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Node::reflect_node(box element, document, HTMLMetaElementBinding::Wrap)
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}
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pub fn get_stylesheet(&self) -> Option<Arc<Stylesheet>> {
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self.stylesheet.borrow().clone()
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}
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fn process_attributes(&self) {
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let element = self.upcast::<Element>();
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if let Some(name) = element.get_attribute(&ns!(), &atom!("name")).r() {
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let name = name.value().to_ascii_lowercase();
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let name = name.trim_matches(HTML_SPACE_CHARACTERS);
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if name == "viewport" {
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self.apply_viewport();
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}
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}
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}
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fn apply_viewport(&self) {
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if !::util::prefs::get_pref("layout.viewport.enabled").as_boolean().unwrap_or(false) {
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return;
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}
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let element = self.upcast::<Element>();
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if let Some(content) = element.get_attribute(&ns!(), &atom!("content")).r() {
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let content = content.value();
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if !content.is_empty() {
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if let Some(translated_rule) = ViewportRule::from_meta(&**content) {
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*self.stylesheet.borrow_mut() = Some(Arc::new(Stylesheet {
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rules: vec![CSSRule::Viewport(translated_rule)],
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origin: Origin::Author,
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media: None,
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// Viewport constraints are always recomputed on resize; they don't need to
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// force all styles to be recomputed.
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dirty_on_viewport_size_change: false,
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}));
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let doc = document_from_node(self);
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doc.invalidate_stylesheets();
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}
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}
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}
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}
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}
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impl HTMLMetaElementMethods for HTMLMetaElement {
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// https://html.spec.whatwg.org/multipage/#dom-meta-name
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make_getter!(Name, "name");
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// https://html.spec.whatwg.org/multipage/#dom-meta-name
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make_setter!(SetName, "name");
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// https://html.spec.whatwg.org/multipage/#dom-meta-content
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make_getter!(Content, "content");
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// https://html.spec.whatwg.org/multipage/#dom-meta-content
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make_setter!(SetContent, "content");
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}
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impl VirtualMethods for HTMLMetaElement {
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fn super_type(&self) -> Option<&VirtualMethods> {
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Some(self.upcast::<HTMLElement>() as &VirtualMethods)
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}
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fn bind_to_tree(&self, tree_in_doc: bool) {
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if let Some(ref s) = self.super_type() {
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s.bind_to_tree(tree_in_doc);
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}
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if tree_in_doc {
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self.process_attributes();
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}
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}
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}
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