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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 #include "platform/scroll/SmoothScrollSequencer.h" | |
5 | |
6 #include "platform/scroll/ProgrammaticScrollAnimator.h" | |
7 #include "platform/scroll/ScrollableArea.h" | |
8 | |
9 namespace blink { | |
10 | |
11 SmoothScrollSequencer* SmoothScrollSequencer::Create() { | |
12 return new SmoothScrollSequencer(); | |
13 } | |
14 | |
15 SmoothScrollSequencer::SmoothScrollSequencer() {} | |
16 | |
17 SmoothScrollSequencer::~SmoothScrollSequencer() {} | |
18 | |
19 void SmoothScrollSequencer::QueueAnimation(ScrollableArea* scrollable, | |
20 ScrollOffset offset) { | |
21 ScrollerAndOffsetPair scroller_offset(scrollable, offset); | |
22 queue_.push_back(scroller_offset); | |
23 } | |
24 | |
25 void SmoothScrollSequencer::RunQueuedAnimations() { | |
26 if (queue_.empty()) { | |
27 current_scrollable_ = nullptr; | |
28 return; | |
29 } | |
30 ScrollerAndOffsetPair scroller_offset = queue_.back(); | |
31 ScrollableArea* scrollable = scroller_offset.first; | |
32 current_scrollable_ = scrollable; | |
33 ScrollOffset offset = scroller_offset.second; | |
34 scrollable->GetProgrammaticScrollAnimator().AnimateToOffset(offset, true); | |
35 queue_.pop_back(); | |
bokan
2017/05/15 17:15:28
nit: this should happen right after reading queue_
sunyunjia
2017/05/19 16:24:29
Done.
| |
36 } | |
37 | |
38 void SmoothScrollSequencer::AbortAnimations() { | |
39 if (current_scrollable_) { | |
40 current_scrollable_->GetProgrammaticScrollAnimator().CancelAnimation(); | |
41 current_scrollable_ = nullptr; | |
42 } | |
43 queue_.clear(); | |
44 } | |
45 | |
46 DEFINE_TRACE(SmoothScrollSequencer) { | |
47 visitor->Trace(current_scrollable_); | |
48 } | |
49 | |
50 } // namespace blink | |
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