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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use dom::bindings::callback::eReportExceptions;
use dom::eventtarget::{AbstractEventTarget, Capturing, Bubbling};
use dom::event::{AbstractEvent, Phase_At_Target, Phase_None, Phase_Bubbling, Phase_Capturing};
use dom::node::AbstractNode;
// See http://dom.spec.whatwg.org/#concept-event-dispatch for the full dispatch algorithm
pub fn dispatch_event(target: AbstractEventTarget,
pseudo_target: Option<AbstractEventTarget>,
event: AbstractEvent) -> bool {
assert!(!event.event().dispatching);
{
let event = event.mut_event();
event.target = Some(pseudo_target.unwrap_or(target));
event.dispatching = true;
}
let type_ = event.event().type_.clone();
let mut chain = ~[];
//TODO: no chain if not participating in a tree
if target.is_node() {
for ancestor in AbstractNode::from_eventtarget(target).ancestors() {
chain.push(AbstractEventTarget::from_node(ancestor));
}
}
event.mut_event().phase = Phase_Capturing;
//FIXME: The "callback this value" should be currentTarget
/* capturing */
for &cur_target in chain.rev_iter() {
let stopped = match cur_target.eventtarget().get_listeners_for(type_, Capturing) {
Some(listeners) => {
event.mut_event().current_target = Some(cur_target);
for listener in listeners.iter() {
listener.HandleEvent__(event, eReportExceptions);
if event.event().stop_immediate {
break;
}
}
event.propagation_stopped()
}
None => false
};
if stopped {
break;
}
}
/* at target */
if !event.propagation_stopped() {
{
let event = event.mut_event();
event.phase = Phase_At_Target;
event.current_target = Some(target);
}
let opt_listeners = target.eventtarget().get_listeners(type_);
for listeners in opt_listeners.iter() {
for listener in listeners.iter() {
listener.HandleEvent__(event, eReportExceptions);
if event.event().stop_immediate {
break;
}
}
}
}
/* bubbling */
if event.bubbles() && !event.propagation_stopped() {
event.mut_event().phase = Phase_Bubbling;
for &cur_target in chain.iter() {
let stopped = match cur_target.eventtarget().get_listeners_for(type_, Bubbling) {
Some(listeners) => {
event.mut_event().current_target = Some(cur_target);
for listener in listeners.iter() {
listener.HandleEvent__(event, eReportExceptions);
if event.event().stop_immediate {
break;
}
}
event.propagation_stopped()
}
None => false
};
if stopped {
break;
}
}
}
let event = event.mut_event();
event.dispatching = false;
event.phase = Phase_None;
event.current_target = None;
!event.DefaultPrevented()
}
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