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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" | |
jbroman
2017/05/29 19:29:47
nit: blank line after copyright header
| |
5 | |
6 #include "platform/scroll/ProgrammaticScrollAnimator.h" | |
7 #include "platform/scroll/ScrollableArea.h" | |
8 | |
9 namespace blink { | |
10 | |
11 SmoothScrollSequencer::SmoothScrollSequencer() {} | |
12 | |
13 void SmoothScrollSequencer::QueueAnimation(ScrollableArea* scrollable, | |
14 ScrollOffset offset) { | |
15 ScrollerAndOffsetPair scroller_offset(scrollable, offset); | |
16 queue_.push_back(scroller_offset); | |
17 } | |
18 | |
19 void SmoothScrollSequencer::RunQueuedAnimations() { | |
20 if (queue_.IsEmpty()) { | |
21 current_scrollable_ = nullptr; | |
22 return; | |
23 } | |
24 ScrollerAndOffsetPair scroller_offset = queue_.back(); | |
25 queue_.pop_back(); | |
26 ScrollableArea* scrollable = scroller_offset.first; | |
27 current_scrollable_ = scrollable; | |
28 ScrollOffset offset = scroller_offset.second; | |
29 scrollable->SetScrollOffset(offset, kProgrammaticScroll, | |
30 kScrollBehaviorSmooth); | |
31 } | |
32 | |
33 void SmoothScrollSequencer::AbortAnimations() { | |
34 if (current_scrollable_) { | |
35 current_scrollable_->GetProgrammaticScrollAnimator().CancelAnimation(); | |
36 current_scrollable_ = nullptr; | |
37 } | |
38 queue_.clear(); | |
39 } | |
40 | |
41 DEFINE_TRACE(SmoothScrollSequencer) { | |
42 visitor->Trace(queue_); | |
43 visitor->Trace(current_scrollable_); | |
44 } | |
45 | |
46 } // namespace blink | |
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