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| 1 // Copyright 2013 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 CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_H_ | |
| 6 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_H_ | |
| 7 | |
| 8 #include "base/memory/scoped_ptr.h" | |
| 9 #include "base/time/time.h" | |
| 10 #include "content/common/content_export.h" | |
| 11 #include "content/common/input/synthetic_gesture_params.h" | |
| 12 #include "third_party/WebKit/public/web/WebInputEvent.h" | |
| 13 | |
| 14 namespace content { | |
| 15 | |
| 16 class SyntheticGestureTarget; | |
| 17 | |
| 18 // Base class for synthetic gesture implementations. A synthetic gesture class | |
| 19 // is responsible for forwaring InputEvents, simulating the gesture, to a | |
| 20 // SyntheticGestureTarget. | |
| 21 // | |
| 22 // Adding new gesture types involved the following steps: | |
| 23 // 1) Create a sub-type of SyntheticGesture that implements the gesture. | |
| 24 // 2) Extend SyntheticGesture::Create with the new class. | |
| 25 // 3) Add at least one unit test per supported input source type (touch, | |
| 26 // mouse, etc) to SyntheticGestureController unit tests. The unit tests | |
| 27 // only checks basic functionality and termination. If the gesture is | |
| 28 // hooked up to Telemetry its correctness can additionally be tested there. | |
| 29 class CONTENT_EXPORT SyntheticGestureNew { | |
| 30 public: | |
| 31 SyntheticGestureNew(); | |
| 32 virtual ~SyntheticGestureNew(); | |
| 33 | |
| 34 static scoped_ptr<SyntheticGestureNew> Create( | |
| 35 const SyntheticGestureParams& gesture_params); | |
| 36 | |
| 37 enum Result { | |
| 38 GESTURE_RUNNING, | |
| 39 GESTURE_FINISHED, | |
| 40 GESTURE_SOURCE_TYPE_NOT_IMPLEMENTED, | |
| 41 GESTURE_SOURCE_TYPE_NOT_SUPPORTED_BY_PLATFORM, | |
| 42 GESTURE_RESULT_MAX = GESTURE_SOURCE_TYPE_NOT_SUPPORTED_BY_PLATFORM | |
| 43 }; | |
| 44 // Update the state of the gesture and forward the appropriate events to the | |
| 45 // platform. This function is called repeatedly by the synthetic gesture | |
| 46 // controller until it stops returning GESTURE_RUNNING. | |
| 47 virtual Result ForwardInputEvents( | |
| 48 const base::TimeDelta& interval, SyntheticGestureTarget* target) = 0; | |
| 49 | |
| 50 private: | |
| 51 DISALLOW_COPY_AND_ASSIGN(SyntheticGestureNew); | |
| 52 }; | |
| 53 | |
| 54 } // namespace content | |
| 55 | |
| 56 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_H_ | |
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