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| 1 // Copyright 2015 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. | |
| 4 | |
| 5 #ifndef BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_INPUT_MANAGER_H_ | |
| 6 #define BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_INPUT_MANAGER_H_ | |
| 7 | |
| 8 #include <memory> | |
| 9 | |
| 10 #include "base/macros.h" | |
| 11 #include "base/single_thread_task_runner.h" | |
| 12 #include "base/synchronization/waitable_event.h" | |
| 13 #include "blimp/client/feature/compositor/blimp_input_handler_wrapper.h" | |
| 14 #include "third_party/WebKit/public/web/WebInputEvent.h" | |
| 15 #include "ui/events/gesture_detection/filtered_gesture_provider.h" | |
| 16 #include "ui/events/gesture_detection/motion_event.h" | |
| 17 | |
| 18 namespace blimp { | |
| 19 namespace client { | |
| 20 | |
| 21 class BlimpInputManagerClient { | |
| 22 public: | |
| 23 virtual void SendWebGestureEvent( | |
| 24 const blink::WebGestureEvent& gesture_event) = 0; | |
| 25 }; | |
| 26 | |
| 27 // The BlimpInputManager handles input events for a specific web widget. The | |
| 28 // class processes ui::events to generate web gesture events which are forwarded | |
| 29 // to the compositor to be handled on the compositor thread. If the event can | |
| 30 // not be handled locally by the compositor, it is given to the | |
| 31 // BlimpInputManagerClient to be sent to the engine. | |
| 32 // | |
| 33 // The BlimpInputManager is created and destroyed on the main thread but can be | |
| 34 // called from the main or compositor thread. It is safe for the | |
| 35 // BlimpInputManager to be called on the compositor thread because: | |
| 36 // 1) The only compositor threaded callers of the BlimpInputManager are the | |
| 37 // BlimpInputManager itself. | |
| 38 // 2) BlimpInputManager blocks the main thread in its dtor to ensure that all | |
| 39 // tasks queued to call it on the compositor thread have been run before it is | |
| 40 // destroyed on the main thread. | |
| 41 // | |
| 42 // It is *important* to destroy the cc::InputHandler on the compositor thread | |
| 43 // before destroying the BlimpInputManager. | |
| 44 | |
| 45 class BlimpInputManager : public ui::GestureProviderClient { | |
| 46 public: | |
| 47 static std::unique_ptr<BlimpInputManager> Create( | |
| 48 BlimpInputManagerClient* client, | |
| 49 scoped_refptr<base::SingleThreadTaskRunner> main_task_runner, | |
| 50 scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner, | |
| 51 const base::WeakPtr<cc::InputHandler>& input_handler); | |
| 52 | |
| 53 ~BlimpInputManager() override; | |
| 54 | |
| 55 // Called to process a ui::MotionEvent. Returns true if the event was | |
| 56 // successfully processed. | |
| 57 bool OnTouchEvent(const ui::MotionEvent& motion_event); | |
| 58 | |
| 59 // Called by the BlimpInputHandlerWrapper after an input event was handled on | |
| 60 // the compositor thread. | |
| 61 // |consumed| is false if the event was not handled by the compositor and | |
| 62 // should be sent to the engine. | |
| 63 void DidHandleWebGestureEvent(const blink::WebGestureEvent& gesture_event, | |
| 64 bool consumed); | |
| 65 | |
| 66 private: | |
| 67 BlimpInputManager( | |
| 68 BlimpInputManagerClient* client, | |
| 69 scoped_refptr<base::SingleThreadTaskRunner> main_task_runner, | |
| 70 scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner, | |
| 71 const base::WeakPtr<cc::InputHandler>& input_handler); | |
| 72 | |
| 73 // ui::GestureProviderClient implementation. | |
| 74 void OnGestureEvent(const ui::GestureEventData& gesture) override; | |
| 75 | |
| 76 // Called on the compositor thread. | |
| 77 void CreateInputHandlerWrapperOnCompositorThread( | |
| 78 base::WeakPtr<BlimpInputManager> input_manager_weak_ptr, | |
| 79 const base::WeakPtr<cc::InputHandler>& input_handler); | |
| 80 void HandleWebGestureEventOnCompositorThread( | |
| 81 const blink::WebGestureEvent& gesture_event); | |
| 82 void ShutdownOnCompositorThread(base::WaitableEvent* shutdown_event); | |
| 83 | |
| 84 bool IsMainThread() const; | |
| 85 bool IsCompositorThread() const; | |
| 86 | |
| 87 BlimpInputManagerClient* client_; | |
| 88 | |
| 89 ui::FilteredGestureProvider gesture_provider_; | |
| 90 | |
| 91 scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_; | |
| 92 scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner_; | |
| 93 | |
| 94 // Used for debug assertions to ensure that the main thread is blocked during | |
| 95 // shutdown. Set in the destructor before the main thread is blocked and | |
| 96 // read in ShutdownOnCompositorThread. | |
| 97 bool main_thread_blocked_; | |
| 98 | |
| 99 std::unique_ptr<BlimpInputHandlerWrapper> input_handler_wrapper_; | |
| 100 | |
| 101 base::WeakPtrFactory<BlimpInputManager> weak_factory_; | |
| 102 | |
| 103 DISALLOW_COPY_AND_ASSIGN(BlimpInputManager); | |
| 104 }; | |
| 105 | |
| 106 } // namespace client | |
| 107 } // namespace blimp | |
| 108 | |
| 109 #endif // BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_INPUT_MANAGER_H_ | |
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Chromium Code Reviews
Issue 2292723003:
Move remaining Blimp feature code to core. (Closed)
