| // 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. |
| |
| #ifndef COMPONENTS_HTML_VIEWER_TOUCH_HANDLER_H_ |
| #define COMPONENTS_HTML_VIEWER_TOUCH_HANDLER_H_ |
| |
| #include "base/basictypes.h" |
| #include "components/mus/public/interfaces/input_events.mojom.h" |
| #include "ui/events/gesture_detection/filtered_gesture_provider.h" |
| |
| namespace blink { |
| class WebWidget; |
| } |
| |
| namespace ui { |
| class MotionEventGeneric; |
| } |
| |
| namespace html_viewer { |
| |
| // TouchHandler is responsible for converting touch events into gesture events. |
| // It does this by converting mus::mojom::Events into a MotionEventGeneric and |
| // using |
| // FilteredGestureProvider. |
| class TouchHandler : public ui::GestureProviderClient { |
| public: |
| explicit TouchHandler(blink::WebWidget* web_widget); |
| ~TouchHandler() override; |
| |
| void OnTouchEvent(const mus::mojom::Event& event); |
| |
| // ui::GestureProviderClient implementation. |
| void OnGestureEvent(const ui::GestureEventData& gesture) override; |
| |
| private: |
| // Updates |current_motion_event_| from |event|. Returns true on success. |
| bool UpdateMotionEvent(const mus::mojom::Event& event); |
| |
| // Sends |current_motion_event_| to the GestureProvider and WebView. |
| void SendMotionEventToGestureProvider(); |
| |
| // Does post processing after sending |current_motion_event_| to the |
| // GestureProvider. |
| void PostProcessMotionEvent(const mus::mojom::Event& event); |
| |
| blink::WebWidget* web_widget_; |
| |
| ui::FilteredGestureProvider gesture_provider_; |
| |
| // As touch events are received they are converted to this event. If null no |
| // touch events are in progress. |
| scoped_ptr<ui::MotionEventGeneric> current_motion_event_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TouchHandler); |
| }; |
| |
| } // namespace html_viewer |
| |
| #endif // COMPONENTS_HTML_VIEWER_TOUCH_HANDLER_H_ |