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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 #include "core/input/ScrollManager.h" | 5 #include "core/input/ScrollManager.h" |
| 6 | 6 |
| 7 #include <memory> | 7 #include <memory> |
| 8 #include "core/dom/DOMNodeIds.h" | 8 #include "core/dom/DOMNodeIds.h" |
| 9 #include "core/dom/NodeComputedStyle.h" | 9 #include "core/dom/NodeComputedStyle.h" |
| 10 #include "core/events/GestureEvent.h" | 10 #include "core/events/GestureEvent.h" |
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| 80 } | 80 } |
| 81 | 81 |
| 82 AutoscrollController* ScrollManager::GetAutoscrollController() const { | 82 AutoscrollController* ScrollManager::GetAutoscrollController() const { |
| 83 if (Page* page = frame_->GetPage()) | 83 if (Page* page = frame_->GetPage()) |
| 84 return &page->GetAutoscrollController(); | 84 return &page->GetAutoscrollController(); |
| 85 return nullptr; | 85 return nullptr; |
| 86 } | 86 } |
| 87 | 87 |
| 88 static bool CanPropagate(const ScrollState& scroll_state, | 88 static bool CanPropagate(const ScrollState& scroll_state, |
| 89 const Element& element) { | 89 const Element& element) { |
| 90 if (!element.GetLayoutBox()->GetScrollableArea()) |
| 91 return true; |
| 92 |
| 90 return (scroll_state.deltaXHint() == 0 || | 93 return (scroll_state.deltaXHint() == 0 || |
| 91 element.GetComputedStyle()->ScrollBoundaryBehaviorX() == | 94 element.GetComputedStyle()->ScrollBoundaryBehaviorX() == |
| 92 EScrollBoundaryBehavior::kAuto) && | 95 EScrollBoundaryBehavior::kAuto) && |
| 93 (scroll_state.deltaYHint() == 0 || | 96 (scroll_state.deltaYHint() == 0 || |
| 94 element.GetComputedStyle()->ScrollBoundaryBehaviorY() == | 97 element.GetComputedStyle()->ScrollBoundaryBehaviorY() == |
| 95 EScrollBoundaryBehavior::kAuto); | 98 EScrollBoundaryBehavior::kAuto); |
| 96 } | 99 } |
| 97 | 100 |
| 98 void ScrollManager::RecomputeScrollChain(const Node& start_node, | 101 void ScrollManager::RecomputeScrollChain(const Node& start_node, |
| 99 const ScrollState& scroll_state, | 102 const ScrollState& scroll_state, |
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| 713 &should_update_capture)) { | 716 &should_update_capture)) { |
| 714 if (should_update_capture) | 717 if (should_update_capture) |
| 715 scrollbar_handling_scroll_gesture_ = scrollbar; | 718 scrollbar_handling_scroll_gesture_ = scrollbar; |
| 716 return true; | 719 return true; |
| 717 } | 720 } |
| 718 } | 721 } |
| 719 return false; | 722 return false; |
| 720 } | 723 } |
| 721 | 724 |
| 722 } // namespace blink | 725 } // namespace blink |
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