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Use internal mutability for HTMLImageElement.

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This commit is contained in:
Ms2ger 2014-06-10 19:22:39 +02:00
parent be375de91f
commit c41dd2477d
1 changed files with 14 additions and 16 deletions
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30
src/components/script/dom/htmlimageelement.rs
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@ -17,12 +17,13 @@ use servo_util::geometry::to_px;
use servo_net::image_cache_task;
use servo_util::url::parse_url;
use servo_util::str::DOMString;
use std::cell::RefCell;
use url::Url;
#[deriving(Encodable)]
pub struct HTMLImageElement {
pub htmlelement: HTMLElement,
image: Untraceable<Option<Url>>,
image: Untraceable<RefCell<Option<Url>>>,
}
impl HTMLImageElementDerived for EventTarget {
@ -32,25 +33,24 @@ impl HTMLImageElementDerived for EventTarget {
}
trait PrivateHTMLImageElementHelpers {
fn update_image(&mut self, value: Option<DOMString>, url: Option<Url>);
fn update_image(&self, value: Option<DOMString>, url: Option<Url>);
}
impl<'a> PrivateHTMLImageElementHelpers for JSRef<'a, HTMLImageElement> {
/// Makes the local `image` member match the status of the `src` attribute and starts
/// prefetching the image. This method must be called after `src` is changed.
fn update_image(&mut self, value: Option<DOMString>, url: Option<Url>) {
let self_alias = self.clone();
let node_alias: &JSRef<Node> = NodeCast::from_ref(&self_alias);
let document = node_alias.owner_doc().root();
fn update_image(&self, value: Option<DOMString>, url: Option<Url>) {
let node: &JSRef<Node> = NodeCast::from_ref(self);
let document = node.owner_doc().root();
let window = document.deref().window.root();
let image_cache = &window.image_cache_task;
match value {
None => {
*self.image = None;
*self.image.deref().borrow_mut() = None;
}
Some(src) => {
let img_url = parse_url(src.as_slice(), url);
*self.image = Some(img_url.clone());
*self.image.deref().borrow_mut() = Some(img_url.clone());
// inform the image cache to load this, but don't store a
// handle.
@ -67,7 +67,7 @@ impl HTMLImageElement {
pub fn new_inherited(localName: DOMString, document: &JSRef<Document>) -> HTMLImageElement {
HTMLImageElement {
htmlelement: HTMLElement::new_inherited(HTMLImageElementTypeId, localName, document),
image: Untraceable::new(None),
image: Untraceable::new(RefCell::new(None)),
}
}
@ -78,12 +78,12 @@ impl HTMLImageElement {
}
pub trait LayoutHTMLImageElementHelpers {
unsafe fn image<'a>(&'a self) -> &'a Option<Url>;
unsafe fn image(&self) -> Option<Url>;
}
impl LayoutHTMLImageElementHelpers for JS<HTMLImageElement> {
unsafe fn image<'a>(&'a self) -> &'a Option<Url> {
&*(*self.unsafe_get()).image
unsafe fn image(&self) -> Option<Url> {
(*self.unsafe_get()).image.borrow().clone()
}
}
@ -253,8 +253,7 @@ impl<'a> VirtualMethods for JSRef<'a, HTMLImageElement> {
if "src" == name.as_slice() {
let window = window_from_node(self).root();
let url = Some(window.deref().get_url());
let mut self_alias = self.clone();
self_alias.update_image(Some(value), url);
self.update_image(Some(value), url);
}
}
@ -265,8 +264,7 @@ impl<'a> VirtualMethods for JSRef<'a, HTMLImageElement> {
}
if "src" == name.as_slice() {
let mut self_alias = self.clone();
self_alias.update_image(None, None);
self.update_image(None, None);
}
}
}