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Side by Side Diff: cc/input/input_handler.h

Issue 13844021: Move compositor thread input handling logic into content (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 7 years, 7 months ago
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1 // Copyright 2011 The Chromium Authors. All rights reserved. 1 // Copyright 2011 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 CC_INPUT_INPUT_HANDLER_H_ 5 #ifndef CC_INPUT_INPUT_HANDLER_H_
6 #define CC_INPUT_INPUT_HANDLER_H_ 6 #define CC_INPUT_INPUT_HANDLER_H_
7 7
8 #include "base/basictypes.h" 8 #include "base/basictypes.h"
9 #include "base/time.h" 9 #include "base/time.h"
10 #include "cc/base/cc_export.h" 10 #include "cc/base/cc_export.h"
11 #include "third_party/WebKit/Source/Platform/chromium/public/WebScrollbar.h" 11 #include "third_party/WebKit/Source/Platform/chromium/public/WebScrollbar.h"
12 12
13 namespace gfx { 13 namespace gfx {
14 class Point; 14 class Point;
15 class PointF; 15 class PointF;
16 class Vector2d; 16 class Vector2d;
17 class Vector2dF; 17 class Vector2dF;
18 } 18 }
19 19
20 namespace cc { 20 namespace cc {
21 21
22 class CC_EXPORT InputHandlerClient {
23 public:
24 virtual ~InputHandlerClient() {}
25
26 virtual void Animate(base::TimeTicks time) = 0;
27 virtual void MainThreadHasStoppedFlinging() = 0;
28
29 protected:
30 InputHandlerClient() {}
31
32 private:
33 DISALLOW_COPY_AND_ASSIGN(InputHandlerClient);
34 };
35
22 // The InputHandler is a way for the embedders to interact with the impl thread 36 // The InputHandler is a way for the embedders to interact with the impl thread
23 // side of the compositor implementation. There is one InputHandler per 37 // side of the compositor implementation. There is one InputHandler per
24 // LayerTreeHost. To use the input handler, implement the InputHanderClient 38 // LayerTreeHost. To use the input handler, implement the InputHanderClient
25 // interface and bind it to the handler on the compositor thread. 39 // interface and bind it to the handler on the compositor thread.
26 class CC_EXPORT InputHandler { 40 class CC_EXPORT InputHandler {
27 public: 41 public:
28 enum ScrollStatus { ScrollOnMainThread, ScrollStarted, ScrollIgnored }; 42 enum ScrollStatus { ScrollOnMainThread, ScrollStarted, ScrollIgnored };
29 enum ScrollInputType { Gesture, Wheel, NonBubblingGesture }; 43 enum ScrollInputType { Gesture, Wheel, NonBubblingGesture };
30 44
45 // Binds a client to this handler to receive notifications. Only one client
46 // can be bound to an InputHandler. The client must outlive the InputHandler.
47 virtual void BindToClient(InputHandlerClient* client) = 0;
48
31 // Selects a layer to be scrolled at a given point in viewport (logical 49 // Selects a layer to be scrolled at a given point in viewport (logical
32 // pixel) coordinates. Returns ScrollStarted if the layer at the coordinates 50 // pixel) coordinates. Returns ScrollStarted if the layer at the coordinates
33 // can be scrolled, ScrollOnMainThread if the scroll event should instead be 51 // can be scrolled, ScrollOnMainThread if the scroll event should instead be
34 // delegated to the main thread, or ScrollIgnored if there is nothing to be 52 // delegated to the main thread, or ScrollIgnored if there is nothing to be
35 // scrolled at the given coordinates. 53 // scrolled at the given coordinates.
36 virtual ScrollStatus ScrollBegin(gfx::Point viewport_point, 54 virtual ScrollStatus ScrollBegin(gfx::Point viewport_point,
37 ScrollInputType type) = 0; 55 ScrollInputType type) = 0;
38 56
39 // Scroll the selected layer starting at the given position. If the scroll 57 // Scroll the selected layer starting at the given position. If the scroll
40 // type given to ScrollBegin was a gesture, then the scroll point and delta 58 // type given to ScrollBegin was a gesture, then the scroll point and delta
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81 base::TimeTicks frame_time) = 0; 99 base::TimeTicks frame_time) = 0;
82 100
83 protected: 101 protected:
84 InputHandler() {} 102 InputHandler() {}
85 virtual ~InputHandler() {} 103 virtual ~InputHandler() {}
86 104
87 private: 105 private:
88 DISALLOW_COPY_AND_ASSIGN(InputHandler); 106 DISALLOW_COPY_AND_ASSIGN(InputHandler);
89 }; 107 };
90 108
91 class CC_EXPORT InputHandlerClient {
92 public:
93 virtual ~InputHandlerClient() {}
94
95 virtual void BindToHandler(InputHandler* handler) = 0;
96 virtual void Animate(base::TimeTicks time) = 0;
97 virtual void MainThreadHasStoppedFlinging() = 0;
98
99 protected:
100 InputHandlerClient() {}
101
102 private:
103 DISALLOW_COPY_AND_ASSIGN(InputHandlerClient);
104 };
105
106 } // namespace cc 109 } // namespace cc
107 110
108 #endif // CC_INPUT_INPUT_HANDLER_H_ 111 #endif // CC_INPUT_INPUT_HANDLER_H_
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