[iOS WK2] REGRESSION (r242687): Programmatic scroll of overflow scroll results in...
[WebKit-https.git] / Source / WebKit / UIProcess / RemoteLayerTree / ios / ScrollingTreeOverflowScrollingNodeIOS.mm
1 /*
2  * Copyright (C) 2014 Apple Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23  * THE POSSIBILITY OF SUCH DAMAGE.
24  */
25
26 #import "config.h"
27 #import "ScrollingTreeOverflowScrollingNodeIOS.h"
28
29 #if PLATFORM(IOS_FAMILY)
30 #if ENABLE(ASYNC_SCROLLING)
31
32 #import "ScrollingTreeScrollingNodeDelegateIOS.h"
33
34 #import <WebCore/ScrollingStateOverflowScrollingNode.h>
35
36 namespace WebKit {
37 using namespace WebCore;
38
39 Ref<ScrollingTreeOverflowScrollingNodeIOS> ScrollingTreeOverflowScrollingNodeIOS::create(WebCore::ScrollingTree& scrollingTree, WebCore::ScrollingNodeID nodeID)
40 {
41     return adoptRef(*new ScrollingTreeOverflowScrollingNodeIOS(scrollingTree, nodeID));
42 }
43
44 ScrollingTreeOverflowScrollingNodeIOS::ScrollingTreeOverflowScrollingNodeIOS(WebCore::ScrollingTree& scrollingTree, WebCore::ScrollingNodeID nodeID)
45     : ScrollingTreeOverflowScrollingNode(scrollingTree, nodeID)
46     , m_scrollingNodeDelegate(std::make_unique<ScrollingTreeScrollingNodeDelegateIOS>(*this))
47 {
48 }
49
50 ScrollingTreeOverflowScrollingNodeIOS::~ScrollingTreeOverflowScrollingNodeIOS()
51 {
52 }
53
54 void ScrollingTreeOverflowScrollingNodeIOS::commitStateBeforeChildren(const WebCore::ScrollingStateNode& stateNode)
55 {
56     if (stateNode.hasChangedProperty(ScrollingStateScrollingNode::ScrollContainerLayer))
57         m_scrollingNodeDelegate->resetScrollViewDelegate();
58
59     ScrollingTreeOverflowScrollingNode::commitStateBeforeChildren(stateNode);
60     m_scrollingNodeDelegate->commitStateBeforeChildren(downcast<ScrollingStateScrollingNode>(stateNode));
61 }
62
63 void ScrollingTreeOverflowScrollingNodeIOS::commitStateAfterChildren(const ScrollingStateNode& stateNode)
64 {
65     ScrollingTreeOverflowScrollingNode::commitStateAfterChildren(stateNode);
66
67     const auto& scrollingStateNode = downcast<ScrollingStateScrollingNode>(stateNode);
68     m_scrollingNodeDelegate->commitStateAfterChildren(scrollingStateNode);
69 }
70
71 void ScrollingTreeOverflowScrollingNodeIOS::repositionScrollingLayers()
72 {
73     m_scrollingNodeDelegate->repositionScrollingLayers();
74 }
75
76 } // namespace WebKit
77
78 #endif // ENABLE(ASYNC_SCROLLING)
79 #endif // PLATFORM(IOS_FAMILY)