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