1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "ui/events/event_processor.h"
7 #include "ui/events/event_target.h"
8 #include "ui/events/event_targeter.h"
12 EventDispatchDetails EventProcessor::OnEventFromSource(Event* event) {
13 EventTarget* root = GetRootTarget();
15 EventTargeter* targeter = root->GetEventTargeter();
17 PrepareEventForDispatch(event);
19 // If |event| is in the process of being dispatched or has already been
20 // dispatched, then dispatch a copy of the event instead.
21 bool dispatch_original_event = event->phase() == EP_PREDISPATCH;
22 Event* event_to_dispatch = event;
23 scoped_ptr<Event> event_copy;
24 if (!dispatch_original_event) {
25 event_copy = Event::Clone(*event);
26 event_to_dispatch = event_copy.get();
29 EventTarget* target = targeter->FindTargetForEvent(root, event_to_dispatch);
30 EventDispatchDetails details;
32 details = DispatchEvent(target, event_to_dispatch);
34 if (!dispatch_original_event) {
35 if (event_to_dispatch->stopped_propagation())
36 event->StopPropagation();
37 else if (event_to_dispatch->handled())
41 if (details.dispatcher_destroyed)
44 if (details.target_destroyed || event->handled())
47 target = targeter->FindNextBestTarget(target, event_to_dispatch);
50 OnEventProcessingFinished(event);
54 void EventProcessor::PrepareEventForDispatch(Event* event) {
57 void EventProcessor::OnEventProcessingFinished(Event* event) {