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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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/TouchActionUtil.h" | 5 #include "core/input/TouchActionUtil.h" |
6 | 6 |
7 #include "core/dom/Node.h" | 7 #include "core/dom/Node.h" |
8 #include "core/html/HTMLFrameOwnerElement.h" | 8 #include "core/html/HTMLFrameOwnerElement.h" |
9 #include "core/layout/LayoutBox.h" | 9 #include "core/layout/LayoutBox.h" |
10 #include "core/layout/LayoutObject.h" | 10 #include "core/layout/LayoutObject.h" |
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49 // Start by permitting all actions, then walk the elements supporting | 49 // Start by permitting all actions, then walk the elements supporting |
50 // touch-action from the target node up to root document, exclude any | 50 // touch-action from the target node up to root document, exclude any |
51 // prohibited actions at or below the element that supports them. | 51 // prohibited actions at or below the element that supports them. |
52 // I.e. pan-related actions are considered up to the nearest scroller, | 52 // I.e. pan-related actions are considered up to the nearest scroller, |
53 // and zoom related actions are considered up to the root. | 53 // and zoom related actions are considered up to the root. |
54 TouchAction effectiveTouchAction = TouchActionAuto; | 54 TouchAction effectiveTouchAction = TouchActionAuto; |
55 TouchAction handledTouchActions = TouchActionNone; | 55 TouchAction handledTouchActions = TouchActionNone; |
56 for (const Node* curNode = &node; curNode; curNode = parentNodeAcrossFrames(
curNode)) { | 56 for (const Node* curNode = &node; curNode; curNode = parentNodeAcrossFrames(
curNode)) { |
57 if (LayoutObject* layoutObject = curNode->layoutObject()) { | 57 if (LayoutObject* layoutObject = curNode->layoutObject()) { |
58 if (supportsTouchAction(*layoutObject)) { | 58 if (supportsTouchAction(*layoutObject)) { |
59 TouchAction action = layoutObject->style()->touchAction(); | 59 TouchAction action = layoutObject->style()->getTouchAction(); |
60 action |= handledTouchActions; | 60 action |= handledTouchActions; |
61 effectiveTouchAction &= action; | 61 effectiveTouchAction &= action; |
62 if (effectiveTouchAction == TouchActionNone) | 62 if (effectiveTouchAction == TouchActionNone) |
63 break; | 63 break; |
64 } | 64 } |
65 | 65 |
66 // If we've reached an ancestor that supports panning, stop allowing
panning to be disabled. | 66 // If we've reached an ancestor that supports panning, stop allowing
panning to be disabled. |
67 if ((layoutObject->isBox() && toLayoutBox(layoutObject)->scrollsOver
flow()) | 67 if ((layoutObject->isBox() && toLayoutBox(layoutObject)->scrollsOver
flow()) |
68 || layoutObject->isLayoutView()) | 68 || layoutObject->isLayoutView()) |
69 handledTouchActions |= TouchActionPan; | 69 handledTouchActions |= TouchActionPan; |
70 } | 70 } |
71 } | 71 } |
72 return effectiveTouchAction; | 72 return effectiveTouchAction; |
73 } | 73 } |
74 | 74 |
75 } // namespace TouchActionUtil | 75 } // namespace TouchActionUtil |
76 } // namespace blink | 76 } // namespace blink |
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