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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_CORE_INPUT_BLIMP_INPUT_MANAGER_H_ | |
6 #define BLIMP_CLIENT_CORE_INPUT_BLIMP_INPUT_MANAGER_H_ | |
7 | |
8 #include <memory> | |
9 | |
10 #include "base/macros.h" | |
11 #include "base/memory/weak_ptr.h" | |
12 #include "base/single_thread_task_runner.h" | |
13 #include "base/synchronization/waitable_event.h" | |
14 #include "base/threading/thread_checker.h" | |
15 #include "third_party/WebKit/public/platform/WebGestureEvent.h" | |
16 #include "third_party/WebKit/public/platform/WebInputEvent.h" | |
17 #include "ui/events/gesture_detection/filtered_gesture_provider.h" | |
18 #include "ui/events/gesture_detection/motion_event.h" | |
19 | |
20 namespace cc { | |
21 class InputHandler; | |
22 } // namespace cc | |
23 | |
24 namespace blimp { | |
25 namespace client { | |
26 class BlimpInputHandlerWrapper; | |
27 | |
28 class BlimpInputManagerClient { | |
29 public: | |
30 virtual void SendWebGestureEvent( | |
31 const blink::WebGestureEvent& gesture_event) = 0; | |
32 }; | |
33 | |
34 // The BlimpInputManager handles input events for a specific web widget. The | |
35 // class processes ui::events to generate web gesture events which are forwarded | |
36 // to the compositor to be handled on the compositor thread. If the event can | |
37 // not be handled locally by the compositor, it is given to the | |
38 // BlimpInputManagerClient to be sent to the engine. | |
39 // The class is created on and lives on the main thread. | |
40 class BlimpInputManager : public ui::GestureProviderClient { | |
41 public: | |
42 static std::unique_ptr<BlimpInputManager> Create( | |
43 BlimpInputManagerClient* client, | |
44 scoped_refptr<base::SingleThreadTaskRunner> main_task_runner, | |
45 scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner, | |
46 const base::WeakPtr<cc::InputHandler>& input_handler); | |
47 | |
48 ~BlimpInputManager() override; | |
49 | |
50 // Called to process a ui::MotionEvent. Returns true if the event was | |
51 // successfully processed. | |
52 bool OnTouchEvent(const ui::MotionEvent& motion_event); | |
53 | |
54 // Called by the BlimpInputHandlerWrapper after an input event was handled on | |
55 // the compositor thread. | |
56 // |consumed| is false if the event was not handled by the compositor and | |
57 // should be sent to the engine. | |
58 void DidHandleWebGestureEvent(const blink::WebGestureEvent& gesture_event, | |
59 bool consumed); | |
60 | |
61 void OnInputHandlerWrapperInitialized( | |
62 base::WeakPtr<BlimpInputHandlerWrapper> input_handler_wrapper_weak_ptr); | |
63 | |
64 private: | |
65 BlimpInputManager( | |
66 BlimpInputManagerClient* client, | |
67 scoped_refptr<base::SingleThreadTaskRunner> main_task_runner, | |
68 scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner, | |
69 const base::WeakPtr<cc::InputHandler>& input_handler); | |
70 | |
71 static void CreateInputHandlerWrapperOnCompositorThread( | |
72 scoped_refptr<base::SingleThreadTaskRunner> main_task_runner, | |
73 const base::WeakPtr<BlimpInputManager>& input_manager_weak_ptr, | |
74 const base::WeakPtr<cc::InputHandler>& input_handler); | |
75 | |
76 // ui::GestureProviderClient implementation. | |
77 void OnGestureEvent(const ui::GestureEventData& gesture) override; | |
78 | |
79 BlimpInputManagerClient* client_; | |
80 | |
81 ui::FilteredGestureProvider gesture_provider_; | |
82 | |
83 scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner_; | |
84 | |
85 std::unique_ptr<BlimpInputHandlerWrapper> input_handler_wrapper_; | |
86 | |
87 // WeakPtr used to post tasks to the wrapper on the compositor thread. | |
88 base::WeakPtr<BlimpInputHandlerWrapper> input_handler_wrapper_weak_ptr_; | |
89 | |
90 base::ThreadChecker thread_checker_; | |
91 | |
92 base::WeakPtrFactory<BlimpInputManager> weak_factory_; | |
93 | |
94 DISALLOW_COPY_AND_ASSIGN(BlimpInputManager); | |
95 }; | |
96 | |
97 } // namespace client | |
98 } // namespace blimp | |
99 | |
100 #endif // BLIMP_CLIENT_CORE_INPUT_BLIMP_INPUT_MANAGER_H_ | |
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