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Side by Side Diff: ui/events/blink/synchronous_input_handler_proxy.h

Issue 1415953004: Move content/renderer input handling for web input events to ui (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebase. Created 5 years ago
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1 // Copyright 2015 The Chromium Authors. All rights reserved. 1 // Copyright 2015 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_RENDERER_INPUT_SYNCHRONOUS_INPUT_HANDLER_PROXY_H_ 5 #ifndef UI_EVENTS_BLINK_SYNCHRONOUS_INPUT_HANDLER_PROXY_H_
6 #define CONTENT_RENDERER_INPUT_SYNCHRONOUS_INPUT_HANDLER_PROXY_H_ 6 #define UI_EVENTS_BLINK_SYNCHRONOUS_INPUT_HANDLER_PROXY_H_
7 7
8 #include "base/time/time.h" 8 #include "base/time/time.h"
9 #include "content/common/content_export.h"
10 9
11 namespace gfx { 10 namespace gfx {
12 class ScrollOffset; 11 class ScrollOffset;
13 class SizeF; 12 class SizeF;
14 } 13 }
15 14
16 namespace content { 15 namespace ui {
17 16
18 class CONTENT_EXPORT SynchronousInputHandler { 17 class SynchronousInputHandler {
19 public: 18 public:
20 virtual ~SynchronousInputHandler() {} 19 virtual ~SynchronousInputHandler() {}
21 20
22 // Informs the Android WebView embedder that a fling animation is running, and 21 // Informs the Android WebView embedder that a fling animation is running, and
23 // that it should call SynchronouslyAnimate() if it wants to execute that 22 // that it should call SynchronouslyAnimate() if it wants to execute that
24 // animation. The embedder/app may choose to override and ignore the 23 // animation. The embedder/app may choose to override and ignore the
25 // request for animation. 24 // request for animation.
26 virtual void SetNeedsSynchronousAnimateInput() = 0; 25 virtual void SetNeedsSynchronousAnimateInput() = 0;
27 26
28 // Informs the Android WebView embedder of the current root scroll and page 27 // Informs the Android WebView embedder of the current root scroll and page
29 // scale state. 28 // scale state.
30 virtual void UpdateRootLayerState( 29 virtual void UpdateRootLayerState(
31 const gfx::ScrollOffset& total_scroll_offset, 30 const gfx::ScrollOffset& total_scroll_offset,
32 const gfx::ScrollOffset& max_scroll_offset, 31 const gfx::ScrollOffset& max_scroll_offset,
33 const gfx::SizeF& scrollable_size, 32 const gfx::SizeF& scrollable_size,
34 float page_scale_factor, 33 float page_scale_factor,
35 float min_page_scale_factor, 34 float min_page_scale_factor,
36 float max_page_scale_factor) = 0; 35 float max_page_scale_factor) = 0;
37 }; 36 };
38 37
39 // Android WebView requires synchronous scrolling from the WebView application. 38 // Android WebView requires synchronous scrolling from the WebView application.
40 // This interface provides support for that behaviour. The WebView embedder will 39 // This interface provides support for that behaviour. The WebView embedder will
41 // act as the InputHandler for controlling the timing of input (fling) 40 // act as the InputHandler for controlling the timing of input (fling)
42 // animations. 41 // animations.
43 class CONTENT_EXPORT SynchronousInputHandlerProxy { 42 class SynchronousInputHandlerProxy {
44 public: 43 public:
45 virtual ~SynchronousInputHandlerProxy() {} 44 virtual ~SynchronousInputHandlerProxy() {}
46 45
47 // Tell the proxy that we will control the timing of root fling animations 46 // Tell the proxy that we will control the timing of root fling animations
48 // from the SynchronousInputHandler. Once this is set, the InputHandler is 47 // from the SynchronousInputHandler. Once this is set, the InputHandler is
49 // not requested to Animate() the InputHandlerProxy for root layer flings. 48 // not requested to Animate() the InputHandlerProxy for root layer flings.
50 // Instead, requests for animation will go to the SynchronousInputHandler and 49 // Instead, requests for animation will go to the SynchronousInputHandler and
51 // animation ticks will only come back through SynchronouslyAnimate(). 50 // animation ticks will only come back through SynchronouslyAnimate().
52 // Non-root flings are not affected. 51 // Non-root flings are not affected.
53 virtual void SetOnlySynchronouslyAnimateRootFlings( 52 virtual void SetOnlySynchronouslyAnimateRootFlings(
54 SynchronousInputHandler* synchronous_input_handler) = 0; 53 SynchronousInputHandler* synchronous_input_handler) = 0;
55 54
56 // Tick input (fling) animations. This may happen out of phase with the frame 55 // Tick input (fling) animations. This may happen out of phase with the frame
57 // timing, or not at all, as it is controlled by the WebView application. When 56 // timing, or not at all, as it is controlled by the WebView application. When
58 // it returns, it expects the animation scroll offsets to be visible to the 57 // it returns, it expects the animation scroll offsets to be visible to the
59 // application. 58 // application.
60 virtual void SynchronouslyAnimate(base::TimeTicks time) = 0; 59 virtual void SynchronouslyAnimate(base::TimeTicks time) = 0;
61 60
62 // Called when the synchronous input handler wants to change the root scroll 61 // Called when the synchronous input handler wants to change the root scroll
63 // offset. Since it has the final say, this overrides values from compositor- 62 // offset. Since it has the final say, this overrides values from compositor-
64 // controlled behaviour. After the offset is applied, the 63 // controlled behaviour. After the offset is applied, the
65 // SynchronousInputHandler should be given back the result in case it differs 64 // SynchronousInputHandler should be given back the result in case it differs
66 // from what was sent. 65 // from what was sent.
67 virtual void SynchronouslySetRootScrollOffset( 66 virtual void SynchronouslySetRootScrollOffset(
68 const gfx::ScrollOffset& root_offset) = 0; 67 const gfx::ScrollOffset& root_offset) = 0;
69 }; 68 };
70 69
71 } // namespace content 70 } // namespace ui
72 71
73 #endif // CONTENT_RENDERER_INPUT_SYNCHRONOUS_INPUT_HANDLER_PROXY_H_ 72 #endif // UI_EVENTS_BLINK_SYNCHRONOUS_INPUT_HANDLER_PROXY_H_
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