blimp: Move compositing, input and render widget feature to client/core.

blimp/client/feature/compositor/blimp_input_manager.cc

-// Copyright 2015 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 "blimp/client/feature/compositor/blimp_input_manager.h"
-
-#include "base/auto_reset.h"
-#include "base/bind.h"
-#include "base/location.h"
-#include "base/memory/ptr_util.h"
-#include "ui/events/blink/blink_event_util.h"
-#include "ui/events/gesture_detection/gesture_provider_config_helper.h"
-
-namespace blimp {
-namespace client {
-
-std::unique_ptr<BlimpInputManager> BlimpInputManager::Create(
-    BlimpInputManagerClient* client,
-    scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner,
-    const base::WeakPtr<cc::InputHandler>& input_handler) {
-  return base::WrapUnique(new BlimpInputManager(
-      client, main_task_runner, compositor_task_runner, input_handler));
-}
-
-BlimpInputManager::BlimpInputManager(
-    BlimpInputManagerClient* client,
-    scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner,
-    const base::WeakPtr<cc::InputHandler>& input_handler)
-    : client_(client),
-      gesture_provider_(ui::GetGestureProviderConfig(
-                ui::GestureProviderConfigType::CURRENT_PLATFORM), this),
-      main_task_runner_(main_task_runner),
-      compositor_task_runner_(compositor_task_runner),
-      main_thread_blocked_(false),
-      weak_factory_(this) {
-  DCHECK(IsMainThread());
-  compositor_task_runner_->PostTask(
-      FROM_HERE,
-      base::Bind(
-          &BlimpInputManager::CreateInputHandlerWrapperOnCompositorThread,
-          base::Unretained(this), weak_factory_.GetWeakPtr(),
-          input_handler));
-}
-
-BlimpInputManager::~BlimpInputManager() {
-  DCHECK(IsMainThread());
-
-  base::WaitableEvent shutdown_event(
-      base::WaitableEvent::ResetPolicy::AUTOMATIC,
-      base::WaitableEvent::InitialState::NOT_SIGNALED);
-  {
-    base::AutoReset<bool> auto_reset_main_thread_blocked(
-        &main_thread_blocked_, true);
-    compositor_task_runner_->PostTask(
-        FROM_HERE,
-        base::Bind(
-            &BlimpInputManager::ShutdownOnCompositorThread,
-            base::Unretained(this), &shutdown_event));
-    shutdown_event.Wait();
-  }
-}
-
-bool BlimpInputManager::OnTouchEvent(const ui::MotionEvent& motion_event) {
-  DCHECK(IsMainThread());
-
-  ui::FilteredGestureProvider::TouchHandlingResult result =
-      gesture_provider_.OnTouchEvent(motion_event);
-  if (!result.succeeded)
-    return false;
-
-  blink::WebTouchEvent touch =
-      ui::CreateWebTouchEventFromMotionEvent(motion_event,
-                                             result.moved_beyond_slop_region);
-
-  // Touch events are queued in the Gesture Provider until acknowledged to
-  // allow them to be consumed by the touch event handlers in blink which can
-  // prevent-default on the event. Since we currently do not support touch
-  // handlers the event is always acknowledged as not consumed.
-  gesture_provider_.OnTouchEventAck(touch.uniqueTouchEventId, false);
-
-  return true;
-}
-
-void BlimpInputManager::OnGestureEvent(const ui::GestureEventData& gesture) {
-  DCHECK(IsMainThread());
-
-  blink::WebGestureEvent web_gesture =
-      ui::CreateWebGestureEventFromGestureEventData(gesture);
-  // TODO(khushalsagar): Remove this workaround after Android fixes UiAutomator
-  // to stop providing shift meta values to synthetic MotionEvents. This
-  // prevents unintended shift+click interpretation of all accessibility clicks.
-  // See crbug.com/443247.
-  if (web_gesture.type == blink::WebInputEvent::GestureTap &&
-      web_gesture.modifiers == blink::WebInputEvent::ShiftKey) {
-    web_gesture.modifiers = 0;
-  }
-
-  compositor_task_runner_->PostTask(
-      FROM_HERE,
-      base::Bind(&BlimpInputManager::HandleWebGestureEventOnCompositorThread,
-                 base::Unretained(this), web_gesture));
-}
-
-void BlimpInputManager::CreateInputHandlerWrapperOnCompositorThread(
-    base::WeakPtr<BlimpInputManager> input_manager_weak_ptr,
-    const base::WeakPtr<cc::InputHandler>& input_handler) {
-  DCHECK(IsCompositorThread());
-
-  // The input_handler might have been destroyed at this point.
-  if (!input_handler)
-    return;
-
-  DCHECK(!input_handler_wrapper_);
-  input_handler_wrapper_ = base::WrapUnique(new BlimpInputHandlerWrapper(
-      main_task_runner_, input_manager_weak_ptr, input_handler.get()));
-}
-
-void BlimpInputManager::HandleWebGestureEventOnCompositorThread(
-    const blink::WebGestureEvent& gesture_event) {
-  DCHECK(IsCompositorThread());
-
-  if (input_handler_wrapper_)
-    input_handler_wrapper_->HandleWebGestureEvent(gesture_event);
-}
-
-void BlimpInputManager::ShutdownOnCompositorThread(
-    base::WaitableEvent* shutdown_event) {
-  DCHECK(IsCompositorThread());
-  DCHECK(main_thread_blocked_);
-
-  input_handler_wrapper_.reset();
-  shutdown_event->Signal();
-}
-
-void BlimpInputManager::DidHandleWebGestureEvent(
-    const blink::WebGestureEvent& gesture_event,
-    bool consumed) {
-  DCHECK(IsMainThread());
-
-  if (!consumed)
-    client_->SendWebGestureEvent(gesture_event);
-}
-
-bool BlimpInputManager::IsMainThread() const {
-  return main_task_runner_->BelongsToCurrentThread();
-}
-
-bool BlimpInputManager::IsCompositorThread() const {
-  return compositor_task_runner_->BelongsToCurrentThread();
-}
-
-}  // namespace client
-}  // namespace blimp