forked from mirrors/gecko-dev
0c3a130356
As described in #1764, this strategy uses the following properties: * DOM members are `JS<T>` types. These cannot be used with being explicitly rooted, but they are required for compiler-derived trace hooks. * Methods that take DOM type arguments receive `&[mut] JSRef<T>`. These are rooted value references that are cloneable but cannot escape. * Methods that return DOM values use `Unrooted<T>`. These are values that may or may not be rooted elsewhere, but callers must root them in order to interact with them in any way. One unsoundness hole exists - `Unrooted` values must be rooted ASAP, or there exists the danger that JSAPI calls could be made that could cause the underlying JS value to be GCed. * All methods are implemented on `JSRef<T>`, enforcing the requirement that all DOM values are rooted for the duration of a method call (with a few exceptions for layout-related code, which cannot root values and therefore interacts with `JS<T>` and `&T` values - this is safe under the assumption that layout code interacts with DOM nodes that are in the tree, therefore rooted, and does not run concurrently with content code) Source-Repo: https://github.com/servo/servo Source-Revision: 731e66ff132e41cdc49bc5324c0e15be19c46ec2
56 lines
1.8 KiB
Rust
56 lines
1.8 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::codegen::BindingDeclarations::HTMLDataElementBinding;
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use dom::bindings::codegen::InheritTypes::HTMLDataElementDerived;
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use dom::bindings::js::{JSRef, Temporary};
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use dom::bindings::error::ErrorResult;
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use dom::document::Document;
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use dom::element::HTMLDataElementTypeId;
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use dom::eventtarget::{EventTarget, NodeTargetTypeId};
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use dom::htmlelement::HTMLElement;
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use dom::node::{Node, ElementNodeTypeId};
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use servo_util::str::DOMString;
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#[deriving(Encodable)]
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pub struct HTMLDataElement {
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pub htmlelement: HTMLElement
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}
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impl HTMLDataElementDerived for EventTarget {
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fn is_htmldataelement(&self) -> bool {
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match self.type_id {
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NodeTargetTypeId(ElementNodeTypeId(HTMLDataElementTypeId)) => true,
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_ => false
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}
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}
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}
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impl HTMLDataElement {
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pub fn new_inherited(localName: DOMString, document: &JSRef<Document>) -> HTMLDataElement {
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HTMLDataElement {
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htmlelement: HTMLElement::new_inherited(HTMLDataElementTypeId, localName, document)
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}
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}
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pub fn new(localName: DOMString, document: &JSRef<Document>) -> Temporary<HTMLDataElement> {
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let element = HTMLDataElement::new_inherited(localName, document);
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Node::reflect_node(~element, document, HTMLDataElementBinding::Wrap)
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}
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}
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pub trait HTMLDataElementMethods {
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fn Value(&self) -> DOMString;
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fn SetValue(&mut self, _value: DOMString) -> ErrorResult;
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}
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impl<'a> HTMLDataElementMethods for JSRef<'a, HTMLDataElement> {
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fn Value(&self) -> DOMString {
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~""
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}
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fn SetValue(&mut self, _value: DOMString) -> ErrorResult {
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Ok(())
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}
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}
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