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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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_INPUT_MOUSE_WHEEL_EVENT_QUEUE_H_ | 5 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_MOUSE_WHEEL_EVENT_QUEUE_H_ |
6 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_MOUSE_WHEEL_EVENT_QUEUE_H_ | 6 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_MOUSE_WHEEL_EVENT_QUEUE_H_ |
7 | 7 |
8 #include <deque> | 8 #include <deque> |
9 | 9 |
10 #include "base/time/time.h" | 10 #include "base/time/time.h" |
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40 | 40 |
41 // A queue for throttling and coalescing mouse wheel events. | 41 // A queue for throttling and coalescing mouse wheel events. |
42 class CONTENT_EXPORT MouseWheelEventQueue { | 42 class CONTENT_EXPORT MouseWheelEventQueue { |
43 public: | 43 public: |
44 // The |client| must outlive the MouseWheelEventQueue. |send_gestures| | 44 // The |client| must outlive the MouseWheelEventQueue. |send_gestures| |
45 // indicates whether mouse wheel events should generate | 45 // indicates whether mouse wheel events should generate |
46 // Scroll[Begin|Update|End] on unhandled acknowledge events. | 46 // Scroll[Begin|Update|End] on unhandled acknowledge events. |
47 // |scroll_transaction_ms| is the duration in which the | 47 // |scroll_transaction_ms| is the duration in which the |
48 // ScrollEnd should be sent after a ScrollUpdate. | 48 // ScrollEnd should be sent after a ScrollUpdate. |
49 MouseWheelEventQueue(MouseWheelEventQueueClient* client, | 49 MouseWheelEventQueue(MouseWheelEventQueueClient* client, |
| 50 bool send_gestures, |
50 int64_t scroll_transaction_ms); | 51 int64_t scroll_transaction_ms); |
51 | 52 |
52 ~MouseWheelEventQueue(); | 53 ~MouseWheelEventQueue(); |
53 | 54 |
54 // Adds an event to the queue. The event may be coalesced with previously | 55 // Adds an event to the queue. The event may be coalesced with previously |
55 // queued events (e.g. consecutive mouse-wheel events can be coalesced into a | 56 // queued events (e.g. consecutive mouse-wheel events can be coalesced into a |
56 // single mouse-wheel event). The event may also be immediately forwarded to | 57 // single mouse-wheel event). The event may also be immediately forwarded to |
57 // the renderer (e.g. when there are no other queued mouse-wheel event). | 58 // the renderer (e.g. when there are no other queued mouse-wheel event). |
58 void QueueEvent(const MouseWheelEventWithLatencyInfo& event); | 59 void QueueEvent(const MouseWheelEventWithLatencyInfo& event); |
59 | 60 |
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90 WheelEventQueue wheel_queue_; | 91 WheelEventQueue wheel_queue_; |
91 std::unique_ptr<QueuedWebMouseWheelEvent> event_sent_for_gesture_ack_; | 92 std::unique_ptr<QueuedWebMouseWheelEvent> event_sent_for_gesture_ack_; |
92 | 93 |
93 // True if a non-synthetic GSB needs to be sent before a GSU is sent. | 94 // True if a non-synthetic GSB needs to be sent before a GSU is sent. |
94 bool needs_scroll_begin_; | 95 bool needs_scroll_begin_; |
95 | 96 |
96 // True if a non-synthetic GSE needs to be sent because a non-synthetic | 97 // True if a non-synthetic GSE needs to be sent because a non-synthetic |
97 // GSB has been sent in the past. | 98 // GSB has been sent in the past. |
98 bool needs_scroll_end_; | 99 bool needs_scroll_end_; |
99 | 100 |
| 101 bool send_gestures_; |
100 int64_t scroll_transaction_ms_; | 102 int64_t scroll_transaction_ms_; |
101 blink::WebGestureDevice scrolling_device_; | 103 blink::WebGestureDevice scrolling_device_; |
102 | 104 |
103 DISALLOW_COPY_AND_ASSIGN(MouseWheelEventQueue); | 105 DISALLOW_COPY_AND_ASSIGN(MouseWheelEventQueue); |
104 }; | 106 }; |
105 | 107 |
106 } // namespace content | 108 } // namespace content |
107 | 109 |
108 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_MOUSE_WHEEL_EVENT_QUEUE_H_ | 110 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_MOUSE_WHEEL_EVENT_QUEUE_H_ |
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