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Script elements now fire async error events (fixes #4506)

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This commit is contained in:
Keith Yeung 2015-02-16 13:53:11 +08:00
parent ec42c01fba
commit 52f8b0ceb7
1 changed files with 37 additions and 3 deletions
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38
components/script/dom/htmlscriptelement.rs
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@ -40,6 +40,8 @@ use url::UrlParser;
pub struct HTMLScriptElement {
htmlelement: HTMLElement,
error_occurred: Cell<bool>,
/// https://html.spec.whatwg.org/multipage/scripting.html#already-started
already_started: Cell<bool>,
@ -68,6 +70,7 @@ impl HTMLScriptElement {
creator: ElementCreator) -> HTMLScriptElement {
HTMLScriptElement {
htmlelement: HTMLElement::new_inherited(HTMLElementTypeId::HTMLScriptElement, localName, prefix, document),
error_occurred: Cell::new(false),
already_started: Cell::new(false),
parser_inserted: Cell::new(creator == ElementCreator::ParserCreated),
non_blocking: Cell::new(creator != ElementCreator::ParserCreated),
@ -93,8 +96,14 @@ pub trait HTMLScriptElementHelpers {
/// Set the "already started" flag (<https://whatwg.org/html/#already-started>)
fn mark_already_started(self);
// Queues error event
fn queue_error_event(self);
/// Dispatch load event.
fn dispatch_load_event(self);
/// Dispatch error event.
fn dispatch_error_event(self);
}
/// Supported script types as defined by
@ -189,7 +198,7 @@ impl<'a> HTMLScriptElementHelpers for JSRef<'a, HTMLScriptElement> {
let (origin, source, url) = match element.get_attribute(ns!(""), &atom!("src")).root() {
Some(src) => {
if src.r().Value().is_empty() {
// TODO: queue a task to fire a simple event named `error` at the element
self.queue_error_event();
return;
}
match UrlParser::new().base_url(&base_url).parse(src.r().Value().as_slice()) {
@ -206,13 +215,14 @@ impl<'a> HTMLScriptElementHelpers for JSRef<'a, HTMLScriptElement> {
}
Err(_) => {
error!("error loading script {}", src.r().Value());
self.queue_error_event();
return;
}
}
}
Err(_) => {
// TODO: queue a task to fire a simple event named `error` at the element
error!("error parsing URL for script {}", src.r().Value());
self.queue_error_event();
return;
}
}
@ -236,6 +246,15 @@ impl<'a> HTMLScriptElementHelpers for JSRef<'a, HTMLScriptElement> {
}
}
fn queue_error_event(self) {
self.error_occurred.set(true);
let window = window_from_node(self).root();
let window = window.r();
let chan = window.script_chan();
let handler = Trusted::new(window.get_cx(), self, chan.clone());
chan.send(ScriptMsg::RunnableMsg(box handler));
}
fn dispatch_load_event(self) {
let window = window_from_node(self).root();
let window = window.r();
@ -247,6 +266,17 @@ impl<'a> HTMLScriptElementHelpers for JSRef<'a, HTMLScriptElement> {
event.r().fire(target);
}
fn dispatch_error_event(self) {
let window = window_from_node(self).root();
let window = window.r();
let event = Event::new(GlobalRef::Window(window),
"error".to_owned(),
EventBubbles::DoesNotBubble,
EventCancelable::NotCancelable).root();
let target: JSRef<EventTarget> = EventTargetCast::from_ref(self);
event.r().fire(target);
}
fn is_javascript(self) -> bool {
let element: JSRef<Element> = ElementCast::from_ref(self);
match element.get_attribute(ns!(""), &atom!("type")).root().map(|s| s.r().Value()) {
@ -361,6 +391,10 @@ impl<'a> HTMLScriptElementMethods for JSRef<'a, HTMLScriptElement> {
impl Runnable for Trusted<HTMLScriptElement> {
fn handler(self: Box<Trusted<HTMLScriptElement>>) {
let target = self.to_temporary().root();
if target.r().error_occurred.get() {
target.r().dispatch_error_event();
} else {
target.r().dispatch_load_event();
}
}
}