OLD | NEW |
| (Empty) |
1 // Copyright (c) 2017 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 #ifndef SmoothScrollSequencer_h | |
5 #define SmoothScrollSequencer_h | |
6 | |
7 #include <utility> | |
8 #include "platform/heap/Handle.h" | |
9 #include "platform/scroll/ScrollTypes.h" | |
10 | |
11 namespace blink { | |
12 | |
13 class ScrollableArea; | |
14 | |
15 // A sequencer that queues the nested scrollers from inside to outside, | |
16 // so that they can be animated from outside to inside when smooth scroll | |
17 // is called. | |
18 class PLATFORM_EXPORT SmoothScrollSequencer final | |
19 : public GarbageCollected<SmoothScrollSequencer> { | |
20 public: | |
21 SmoothScrollSequencer(); | |
22 // Add a scroll offset animation to the back of a queue. | |
23 void QueueAnimation(ScrollableArea*, ScrollOffset); | |
24 | |
25 // Run the animation at the back of the queue. | |
26 void RunQueuedAnimations(); | |
27 | |
28 // Abort the currently running animation and all the animations in the queue. | |
29 void AbortAnimations(); | |
30 | |
31 DECLARE_TRACE(); | |
32 | |
33 private: | |
34 typedef std::pair<Member<ScrollableArea>, ScrollOffset> ScrollerAndOffsetPair; | |
35 HeapVector<ScrollerAndOffsetPair> queue_; | |
36 Member<ScrollableArea> current_scrollable_; | |
37 }; | |
38 | |
39 } // namespace blink | |
40 | |
41 #endif // SmoothScrollSequencer_h | |
OLD | NEW |