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#include "config.h"
27#include "RemoteScrollingCoordinatorProxy.h"
28
29#if PLATFORM(IOS)
30#if ENABLE(ASYNC_SCROLLING)
31
32#include "LayerRepresentation.h"
33#include "RemoteLayerTreeHost.h"
34#include "WebPageProxy.h"
35#include <WebCore/ScrollingStateFrameScrollingNode.h>
36#include <WebCore/ScrollingStateOverflowScrollingNode.h>
37#include <WebCore/ScrollingStateTree.h>
38#include <UIKit/UIView.h>
39
40using namespace WebCore;
41
42namespace WebKit {
43
44static LayerRepresentation layerRepresentationFromLayerOrView(LayerOrView *layerOrView)
45{
46    return LayerRepresentation(layerOrView.layer);
47}
48
49void RemoteScrollingCoordinatorProxy::connectStateNodeLayers(ScrollingStateTree& stateTree, const RemoteLayerTreeHost& layerTreeHost)
50{
51    for (auto& currNode : stateTree.nodeMap().values()) {
52        switch (currNode->nodeType()) {
53        case OverflowScrollingNode: {
54            ScrollingStateOverflowScrollingNode* scrollingStateNode = toScrollingStateOverflowScrollingNode(currNode);
55
56            if (scrollingStateNode->hasChangedProperty(ScrollingStateNode::ScrollLayer))
57                scrollingStateNode->setLayer(layerRepresentationFromLayerOrView(layerTreeHost.getLayer(scrollingStateNode->layer())));
58
59            if (scrollingStateNode->hasChangedProperty(ScrollingStateOverflowScrollingNode::ScrolledContentsLayer))
60                scrollingStateNode->setScrolledContentsLayer(layerRepresentationFromLayerOrView(layerTreeHost.getLayer(scrollingStateNode->scrolledContentsLayer())));
61            break;
62        };
63        case FrameScrollingNode: {
64            ScrollingStateFrameScrollingNode* scrollingStateNode = toScrollingStateFrameScrollingNode(currNode);
65
66            if (scrollingStateNode->hasChangedProperty(ScrollingStateNode::ScrollLayer))
67                scrollingStateNode->setLayer(layerRepresentationFromLayerOrView(layerTreeHost.getLayer(scrollingStateNode->layer())));
68
69            if (scrollingStateNode->hasChangedProperty(ScrollingStateFrameScrollingNode::CounterScrollingLayer))
70                scrollingStateNode->setCounterScrollingLayer(layerRepresentationFromLayerOrView(layerTreeHost.getLayer(scrollingStateNode->counterScrollingLayer())));
71
72            // FIXME: we should never have header and footer layers coming from the WebProcess.
73            if (scrollingStateNode->hasChangedProperty(ScrollingStateFrameScrollingNode::HeaderLayer))
74                scrollingStateNode->setHeaderLayer(layerRepresentationFromLayerOrView(layerTreeHost.getLayer(scrollingStateNode->headerLayer())));
75
76            if (scrollingStateNode->hasChangedProperty(ScrollingStateFrameScrollingNode::FooterLayer))
77                scrollingStateNode->setFooterLayer(layerRepresentationFromLayerOrView(layerTreeHost.getLayer(scrollingStateNode->footerLayer())));
78            break;
79        }
80        case FixedNode:
81        case StickyNode:
82            if (currNode->hasChangedProperty(ScrollingStateNode::ScrollLayer))
83                currNode->setLayer(layerRepresentationFromLayerOrView(layerTreeHost.getLayer(currNode->layer())));
84            break;
85        }
86    }
87}
88
89FloatRect RemoteScrollingCoordinatorProxy::customFixedPositionRect() const
90{
91    return m_webPageProxy.computeCustomFixedPositionRect(m_webPageProxy.unobscuredContentRect(), m_webPageProxy.displayedContentScale());
92}
93
94void RemoteScrollingCoordinatorProxy::scrollingTreeNodeWillStartPanGesture()
95{
96    m_webPageProxy.overflowScrollViewWillStartPanGesture();
97}
98
99void RemoteScrollingCoordinatorProxy::scrollingTreeNodeWillStartScroll()
100{
101    m_webPageProxy.overflowScrollWillStartScroll();
102}
103
104void RemoteScrollingCoordinatorProxy::scrollingTreeNodeDidEndScroll()
105{
106    m_webPageProxy.overflowScrollDidEndScroll();
107}
108
109} // namespace WebKit
110
111
112#endif // ENABLE(ASYNC_SCROLLING)
113#endif // PLATFORM(IOS)
114