| // 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 "content/browser/renderer_host/input/synthetic_gesture_controller.h" |
| |
| #include "base/debug/trace_event.h" |
| #include "content/browser/renderer_host/input/synthetic_gesture_target.h" |
| #include "content/common/input/synthetic_smooth_scroll_gesture_params.h" |
| #include "content/common/input_messages.h" |
| #include "content/public/browser/render_widget_host.h" |
| |
| namespace content { |
| |
| SyntheticGestureController::SyntheticGestureController( |
| scoped_ptr<SyntheticGestureTarget> gesture_target) |
| : gesture_target_(gesture_target.Pass()) {} |
| |
| SyntheticGestureController::~SyntheticGestureController() {} |
| |
| void SyntheticGestureController::QueueSyntheticGesture( |
| scoped_ptr<SyntheticGesture> synthetic_gesture, |
| const OnGestureCompleteCallback& completion_callback) { |
| DCHECK(synthetic_gesture); |
| |
| bool was_empty = pending_gesture_queue_.IsEmpty(); |
| |
| pending_gesture_queue_.Push(synthetic_gesture.Pass(), completion_callback); |
| |
| if (was_empty) |
| StartGesture(*pending_gesture_queue_.FrontGesture()); |
| } |
| |
| void SyntheticGestureController::Flush(base::TimeTicks timestamp) { |
| TRACE_EVENT0("input", "SyntheticGestureController::Flush"); |
| if (pending_gesture_queue_.IsEmpty()) |
| return; |
| |
| if (pending_gesture_result_) |
| return; |
| |
| SyntheticGesture* gesture = pending_gesture_queue_.FrontGesture(); |
| SyntheticGesture::Result result = |
| gesture->ForwardInputEvents(timestamp, gesture_target_.get()); |
| |
| if (result == SyntheticGesture::GESTURE_RUNNING) { |
| gesture_target_->SetNeedsFlush(); |
| return; |
| } |
| |
| // It's possible that all events generated by the gesture have been fully |
| // dispatched at this point, in which case |OnDidFlushInput()| was called |
| // before |pending_gesture_result_| was initialized. Requesting another flush |
| // will trigger the necessary gesture-ending call to |OnDidFlushInput()|. |
| pending_gesture_result_.reset(new SyntheticGesture::Result(result)); |
| gesture_target_->SetNeedsFlush(); |
| } |
| |
| void SyntheticGestureController::OnDidFlushInput() { |
| if (!pending_gesture_result_) |
| return; |
| |
| DCHECK(!pending_gesture_queue_.IsEmpty()); |
| auto pending_gesture_result = pending_gesture_result_.Pass(); |
| StopGesture(*pending_gesture_queue_.FrontGesture(), |
| pending_gesture_queue_.FrontCallback(), |
| *pending_gesture_result); |
| pending_gesture_queue_.Pop(); |
| |
| if (!pending_gesture_queue_.IsEmpty()) |
| StartGesture(*pending_gesture_queue_.FrontGesture()); |
| } |
| |
| void SyntheticGestureController::StartGesture(const SyntheticGesture& gesture) { |
| TRACE_EVENT_ASYNC_BEGIN0("input,benchmark", |
| "SyntheticGestureController::running", |
| &gesture); |
| gesture_target_->SetNeedsFlush(); |
| } |
| |
| void SyntheticGestureController::StopGesture( |
| const SyntheticGesture& gesture, |
| const OnGestureCompleteCallback& completion_callback, |
| SyntheticGesture::Result result) { |
| DCHECK_NE(result, SyntheticGesture::GESTURE_RUNNING); |
| TRACE_EVENT_ASYNC_END0("input,benchmark", |
| "SyntheticGestureController::running", |
| &gesture); |
| |
| completion_callback.Run(result); |
| } |
| |
| SyntheticGestureController::GestureAndCallbackQueue::GestureAndCallbackQueue() { |
| } |
| |
| SyntheticGestureController::GestureAndCallbackQueue:: |
| ~GestureAndCallbackQueue() { |
| } |
| |
| } // namespace content |