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Implement cancellable runnables.

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Additionally, make image load events cancellable. Resolves #7731.
This commit is contained in:
Josh Matthews 2015-10-21 16:42:30 -04:00
parent 9fea6d2e46
commit 989e80036e
4 changed files with 62 additions and 8 deletions
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9
components/script/dom/htmlimageelement.rs
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@ -110,13 +110,16 @@ impl HTMLImageElement {
let trusted_node = Trusted::new(window.get_cx(), self, window.script_chan());
let (responder_sender, responder_receiver) = ipc::channel().unwrap();
let script_chan = window.script_chan();
let wrapper = window.get_runnable_wrapper();
ROUTER.add_route(responder_receiver.to_opaque(), box move |message| {
// Return the image via a message to the script task, which marks the element
// as dirty and triggers a reflow.
let image_response = message.to().unwrap();
script_chan.send(CommonScriptMsg::RunnableMsg(UpdateReplacedElement,
box ImageResponseHandlerRunnable::new(
trusted_node.clone(), image_response))).unwrap();
let runnable = ImageResponseHandlerRunnable::new(
trusted_node.clone(), image_response);
let runnable = wrapper.wrap_runnable(runnable);
script_chan.send(CommonScriptMsg::RunnableMsg(
UpdateReplacedElement, runnable)).unwrap();
});
image_cache.request_image(img_url,