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Side by Side Diff: content/browser/renderer_host/input/synthetic_gesture_new.h

Issue 62443007: Replace old with new synthetic gesture framework. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: opt_mouse_move_event_x/y -> opt_start_x/y Created 7 years, 1 month ago
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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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