| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/events/event_processor.h" |
| |
| #include "ui/events/event_target.h" |
| #include "ui/events/event_targeter.h" |
| |
| namespace ui { |
| |
| EventDispatchDetails EventProcessor::OnEventFromSource(Event* event) { |
| EventTarget* root = GetRootTarget(); |
| CHECK(root); |
| EventTargeter* targeter = root->GetEventTargeter(); |
| CHECK(targeter); |
| |
| // If |event| is in the process of being dispatched or has already been |
| // dispatched, then dispatch a copy of the event instead. |
| bool dispatch_original_event = event->phase() == EP_PREDISPATCH; |
| Event* event_to_dispatch = event; |
| std::unique_ptr<Event> event_copy; |
| if (!dispatch_original_event) { |
| event_copy = Event::Clone(*event); |
| event_to_dispatch = event_copy.get(); |
| } |
| |
| OnEventProcessingStarted(event_to_dispatch); |
| EventTarget* target = NULL; |
| if (!event_to_dispatch->handled()) |
| target = targeter->FindTargetForEvent(root, event_to_dispatch); |
| |
| EventDispatchDetails details; |
| while (target) { |
| details = DispatchEvent(target, event_to_dispatch); |
| |
| if (!dispatch_original_event) { |
| if (event_to_dispatch->stopped_propagation()) |
| event->StopPropagation(); |
| else if (event_to_dispatch->handled()) |
| event->SetHandled(); |
| } |
| |
| if (details.dispatcher_destroyed) |
| return details; |
| |
| if (details.target_destroyed || event->handled()) |
| break; |
| |
| target = targeter->FindNextBestTarget(target, event_to_dispatch); |
| } |
| |
| OnEventProcessingFinished(event); |
| return details; |
| } |
| |
| void EventProcessor::OnEventProcessingStarted(Event* event) { |
| } |
| |
| void EventProcessor::OnEventProcessingFinished(Event* event) { |
| } |
| |
| } // namespace ui |