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Side by Side Diff: content/browser/renderer_host/overscroll_controller.h

Issue 291003002: Move OverscrollController to RenderWidgetHostViewAura (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 6 years, 7 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef CONTENT_BROWSER_RENDERER_HOST_OVERSCROLL_CONTROLLER_H_ 5 #ifndef CONTENT_BROWSER_RENDERER_HOST_OVERSCROLL_CONTROLLER_H_
6 #define CONTENT_BROWSER_RENDERER_HOST_OVERSCROLL_CONTROLLER_H_ 6 #define CONTENT_BROWSER_RENDERER_HOST_OVERSCROLL_CONTROLLER_H_
7 7
8 #include "base/basictypes.h" 8 #include "base/basictypes.h"
9 #include "base/compiler_specific.h" 9 #include "base/compiler_specific.h"
10 #include "third_party/WebKit/public/web/WebInputEvent.h" 10 #include "third_party/WebKit/public/web/WebInputEvent.h"
11 11
12 namespace ui { 12 namespace ui {
13 struct LatencyInfo; 13 struct LatencyInfo;
14 } 14 }
15 15
16 namespace content { 16 namespace content {
17 17
18 class MockRenderWidgetHost; 18 class RenderWidgetHostViewAuraOverscrollTest;
19 class OverscrollControllerDelegate; 19 class OverscrollControllerDelegate;
20 20
21 // Indicates the direction that the scroll is heading in relative to the screen, 21 // Indicates the direction that the scroll is heading in relative to the screen,
22 // with the top being NORTH. 22 // with the top being NORTH.
23 enum OverscrollMode { 23 enum OverscrollMode {
24 OVERSCROLL_NONE, 24 OVERSCROLL_NONE,
25 OVERSCROLL_NORTH, 25 OVERSCROLL_NORTH,
26 OVERSCROLL_SOUTH, 26 OVERSCROLL_SOUTH,
27 OVERSCROLL_WEST, 27 OVERSCROLL_WEST,
28 OVERSCROLL_EAST, 28 OVERSCROLL_EAST,
(...skipping 12 matching lines...) Expand all
41 // The result of |DispatchEvent()|, indicating either how the event was 41 // The result of |DispatchEvent()|, indicating either how the event was
42 // handled, or how it should be handled by the caller. 42 // handled, or how it should be handled by the caller.
43 enum Disposition { 43 enum Disposition {
44 CONSUMED, 44 CONSUMED,
45 SHOULD_FORWARD_TO_RENDERER, 45 SHOULD_FORWARD_TO_RENDERER,
46 SHOULD_FORWARD_TO_GESTURE_QUEUE 46 SHOULD_FORWARD_TO_GESTURE_QUEUE
47 }; 47 };
48 // This must be called when dispatching any event from the 48 // This must be called when dispatching any event from the
49 // RenderWidgetHostView so that the state of the overscroll gesture can be 49 // RenderWidgetHostView so that the state of the overscroll gesture can be
50 // updated properly. 50 // updated properly.
51 Disposition DispatchEvent(const blink::WebInputEvent& event, 51 Disposition DispatchEvent(const blink::WebInputEvent& event);
52 const ui::LatencyInfo& latency_info);
53 52
54 // This must be called when the ACK for any event comes in. This updates the 53 // This must be called when the ACK for any event comes in. This updates the
55 // overscroll gesture status as appropriate. 54 // overscroll gesture status as appropriate.
56 void ReceivedEventACK(const blink::WebInputEvent& event, bool processed); 55 void ReceivedEventACK(const blink::WebInputEvent& event, bool processed);
57 56
58 // This must be called when a gesture event is filtered out and not sent to 57 // This must be called when a gesture event is filtered out and not sent to
59 // the renderer. 58 // the renderer.
60 void DiscardingGestureEvent(const blink::WebGestureEvent& event); 59 void DiscardingGestureEvent(const blink::WebGestureEvent& event);
61 60
62 OverscrollMode overscroll_mode() const { return overscroll_mode_; } 61 OverscrollMode overscroll_mode() const { return overscroll_mode_; }
63 62
64 void set_delegate(OverscrollControllerDelegate* delegate) { 63 void set_delegate(OverscrollControllerDelegate* delegate) {
65 delegate_ = delegate; 64 delegate_ = delegate;
66 } 65 }
67 66
68 // Resets internal states. 67 // Resets internal states.
69 void Reset(); 68 void Reset();
70 69
71 // Cancels any in-progress overscroll (and calls OnOverscrollModeChange on the 70 // Cancels any in-progress overscroll (and calls OnOverscrollModeChange on the
72 // delegate if necessary), and resets internal states. 71 // delegate if necessary), and resets internal states.
73 void Cancel(); 72 void Cancel();
74 73
75 private: 74 private:
76 friend class MockRenderWidgetHost; 75 friend class RenderWidgetHostViewAuraOverscrollTest;
77 76
78 // Different scrolling states. 77 // Different scrolling states.
79 enum ScrollState { 78 enum ScrollState {
80 STATE_UNKNOWN, 79 STATE_UNKNOWN,
81 STATE_PENDING, 80 STATE_PENDING,
82 STATE_CONTENT_SCROLLING, 81 STATE_CONTENT_SCROLLING,
83 STATE_OVERSCROLLING, 82 STATE_OVERSCROLLING,
84 }; 83 };
85 84
86 // Returns true if the event indicates that the in-progress overscroll gesture 85 // Returns true if the event indicates that the in-progress overscroll gesture
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128 // The delegate that receives the overscroll updates. The delegate is not 127 // The delegate that receives the overscroll updates. The delegate is not
129 // owned by this controller. 128 // owned by this controller.
130 OverscrollControllerDelegate* delegate_; 129 OverscrollControllerDelegate* delegate_;
131 130
132 DISALLOW_COPY_AND_ASSIGN(OverscrollController); 131 DISALLOW_COPY_AND_ASSIGN(OverscrollController);
133 }; 132 };
134 133
135 } // namespace content 134 } // namespace content
136 135
137 #endif // CONTENT_BROWSER_RENDERER_HOST_OVERSCROLL_CONTROLLER_H_ 136 #endif // CONTENT_BROWSER_RENDERER_HOST_OVERSCROLL_CONTROLLER_H_
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