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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 COMPONENTS_HTML_VIEWER_TOUCH_HANDLER_H_ | |
6 #define COMPONENTS_HTML_VIEWER_TOUCH_HANDLER_H_ | |
7 | |
8 #include "base/macros.h" | |
9 #include "components/mus/public/interfaces/input_events.mojom.h" | |
10 #include "ui/events/gesture_detection/filtered_gesture_provider.h" | |
11 | |
12 namespace blink { | |
13 class WebWidget; | |
14 } | |
15 | |
16 namespace ui { | |
17 class MotionEventGeneric; | |
18 } | |
19 | |
20 namespace html_viewer { | |
21 | |
22 // TouchHandler is responsible for converting touch events into gesture events. | |
23 // It does this by converting mus::mojom::Events into a MotionEventGeneric and | |
24 // using | |
25 // FilteredGestureProvider. | |
26 class TouchHandler : public ui::GestureProviderClient { | |
27 public: | |
28 explicit TouchHandler(blink::WebWidget* web_widget); | |
29 ~TouchHandler() override; | |
30 | |
31 void OnTouchEvent(const mus::mojom::Event& event); | |
32 | |
33 // ui::GestureProviderClient implementation. | |
34 void OnGestureEvent(const ui::GestureEventData& gesture) override; | |
35 | |
36 private: | |
37 // Updates |current_motion_event_| from |event|. Returns true on success. | |
38 bool UpdateMotionEvent(const mus::mojom::Event& event); | |
39 | |
40 // Sends |current_motion_event_| to the GestureProvider and WebView. | |
41 void SendMotionEventToGestureProvider(); | |
42 | |
43 // Does post processing after sending |current_motion_event_| to the | |
44 // GestureProvider. | |
45 void PostProcessMotionEvent(const mus::mojom::Event& event); | |
46 | |
47 blink::WebWidget* web_widget_; | |
48 | |
49 ui::FilteredGestureProvider gesture_provider_; | |
50 | |
51 // As touch events are received they are converted to this event. If null no | |
52 // touch events are in progress. | |
53 scoped_ptr<ui::MotionEventGeneric> current_motion_event_; | |
54 | |
55 DISALLOW_COPY_AND_ASSIGN(TouchHandler); | |
56 }; | |
57 | |
58 } // namespace html_viewer | |
59 | |
60 #endif // COMPONENTS_HTML_VIEWER_TOUCH_HANDLER_H_ | |
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