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 "ScrollingTreeFrameScrollingNode.h" |
28 | |
29 | #if ENABLE(ASYNC_SCROLLING) |
30 | |
31 | #include "FrameView.h" |
32 | #include "Logging.h" |
33 | #include "ScrollingStateFrameScrollingNode.h" |
34 | #include "ScrollingStateTree.h" |
35 | #include "ScrollingTree.h" |
36 | #include <wtf/text/TextStream.h> |
37 | |
38 | namespace WebCore { |
39 | |
40 | ScrollingTreeFrameScrollingNode::ScrollingTreeFrameScrollingNode(ScrollingTree& scrollingTree, ScrollingNodeType nodeType, ScrollingNodeID nodeID) |
41 | : ScrollingTreeScrollingNode(scrollingTree, nodeType, nodeID) |
42 | { |
43 | ASSERT(isFrameScrollingNode()); |
44 | } |
45 | |
46 | ScrollingTreeFrameScrollingNode::~ScrollingTreeFrameScrollingNode() = default; |
47 | |
48 | void ScrollingTreeFrameScrollingNode::commitStateBeforeChildren(const ScrollingStateNode& stateNode) |
49 | { |
50 | ScrollingTreeScrollingNode::commitStateBeforeChildren(stateNode); |
51 | |
52 | const ScrollingStateFrameScrollingNode& state = downcast<ScrollingStateFrameScrollingNode>(stateNode); |
53 | |
54 | if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::FrameScaleFactor)) |
55 | m_frameScaleFactor = state.frameScaleFactor(); |
56 | |
57 | if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::ReasonsForSynchronousScrolling)) |
58 | m_synchronousScrollingReasons = state.synchronousScrollingReasons(); |
59 | |
60 | if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::HeaderHeight)) |
61 | m_headerHeight = state.headerHeight(); |
62 | |
63 | if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::FooterHeight)) |
64 | m_footerHeight = state.footerHeight(); |
65 | |
66 | if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::BehaviorForFixedElements)) |
67 | m_behaviorForFixed = state.scrollBehaviorForFixedElements(); |
68 | |
69 | if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::TopContentInset)) |
70 | m_topContentInset = state.topContentInset(); |
71 | |
72 | if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::FixedElementsLayoutRelativeToFrame)) |
73 | m_fixedElementsLayoutRelativeToFrame = state.fixedElementsLayoutRelativeToFrame(); |
74 | |
75 | if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::LayoutViewport)) { |
76 | m_layoutViewport = state.layoutViewport(); |
77 | updateViewportForCurrentScrollPosition({ }); |
78 | } |
79 | |
80 | if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::MinLayoutViewportOrigin)) |
81 | m_minLayoutViewportOrigin = state.minLayoutViewportOrigin(); |
82 | |
83 | if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::MaxLayoutViewportOrigin)) |
84 | m_maxLayoutViewportOrigin = state.maxLayoutViewportOrigin(); |
85 | } |
86 | |
87 | bool ScrollingTreeFrameScrollingNode::scrollPositionAndLayoutViewportMatch(const FloatPoint& position, Optional<FloatRect> overrideLayoutViewport) |
88 | { |
89 | return position == currentScrollPosition() && (!overrideLayoutViewport || overrideLayoutViewport.value() == m_layoutViewport); |
90 | } |
91 | |
92 | FloatRect ScrollingTreeFrameScrollingNode::layoutViewportForScrollPosition(const FloatPoint& visibleContentOrigin, float scale) const |
93 | { |
94 | FloatRect visibleContentRect(visibleContentOrigin, scrollableAreaSize()); |
95 | LayoutRect visualViewport(FrameView::visibleDocumentRect(visibleContentRect, headerHeight(), footerHeight(), totalContentsSize(), scale)); |
96 | LayoutRect layoutViewport(m_layoutViewport); |
97 | |
98 | LOG_WITH_STREAM(Scrolling, stream << "\nScrolling thread: " << "(visibleContentOrigin " << visibleContentOrigin << ") fixed behavior " << m_behaviorForFixed); |
99 | LOG_WITH_STREAM(Scrolling, stream << " layoutViewport: " << layoutViewport); |
100 | LOG_WITH_STREAM(Scrolling, stream << " visualViewport: " << visualViewport); |
101 | LOG_WITH_STREAM(Scrolling, stream << " scroll positions: min: " << minLayoutViewportOrigin() << " max: " << maxLayoutViewportOrigin()); |
102 | |
103 | LayoutPoint newLocation = FrameView::computeLayoutViewportOrigin(LayoutRect(visualViewport), LayoutPoint(minLayoutViewportOrigin()), LayoutPoint(maxLayoutViewportOrigin()), layoutViewport, m_behaviorForFixed); |
104 | |
105 | if (layoutViewport.location() != newLocation) { |
106 | layoutViewport.setLocation(newLocation); |
107 | LOG_WITH_STREAM(Scrolling, stream << " new layoutViewport " << layoutViewport); |
108 | } |
109 | |
110 | return layoutViewport; |
111 | } |
112 | |
113 | void ScrollingTreeFrameScrollingNode::updateViewportForCurrentScrollPosition(Optional<FloatRect> overrideLayoutViewport) |
114 | { |
115 | if (overrideLayoutViewport) |
116 | setLayoutViewport(overrideLayoutViewport.value()); |
117 | else |
118 | setLayoutViewport(layoutViewportForScrollPosition(currentScrollPosition(), frameScaleFactor())); |
119 | } |
120 | |
121 | FloatSize ScrollingTreeFrameScrollingNode::viewToContentsOffset(const FloatPoint& scrollPosition) const |
122 | { |
123 | return toFloatSize(scrollPosition) - FloatSize(0, headerHeight() + topContentInset()); |
124 | } |
125 | |
126 | LayoutPoint ScrollingTreeFrameScrollingNode::parentToLocalPoint(LayoutPoint point) const |
127 | { |
128 | return point - LayoutSize(0, headerHeight() + topContentInset()); |
129 | } |
130 | |
131 | LayoutPoint ScrollingTreeFrameScrollingNode::localToContentsPoint(LayoutPoint point) const |
132 | { |
133 | auto scrolledPoint = point + LayoutPoint(currentScrollPosition()); |
134 | return scrolledPoint.scaled(1 / frameScaleFactor()); |
135 | } |
136 | |
137 | void ScrollingTreeFrameScrollingNode::dumpProperties(TextStream& ts, ScrollingStateTreeAsTextBehavior behavior) const |
138 | { |
139 | ts << "frame scrolling node" ; |
140 | ScrollingTreeScrollingNode::dumpProperties(ts, behavior); |
141 | |
142 | ts.dumpProperty("layout viewport" , m_layoutViewport); |
143 | ts.dumpProperty("min layoutViewport origin" , m_minLayoutViewportOrigin); |
144 | ts.dumpProperty("max layoutViewport origin" , m_maxLayoutViewportOrigin); |
145 | |
146 | if (m_frameScaleFactor != 1) |
147 | ts.dumpProperty("frame scale factor" , m_frameScaleFactor); |
148 | if (m_topContentInset) |
149 | ts.dumpProperty("top content inset" , m_topContentInset); |
150 | |
151 | if (m_headerHeight) |
152 | ts.dumpProperty("header height" , m_headerHeight); |
153 | if (m_footerHeight) |
154 | ts.dumpProperty("footer height" , m_footerHeight); |
155 | if (m_synchronousScrollingReasons) |
156 | ts.dumpProperty("synchronous scrolling reasons" , ScrollingCoordinator::synchronousScrollingReasonsAsText(m_synchronousScrollingReasons)); |
157 | |
158 | ts.dumpProperty("behavior for fixed" , m_behaviorForFixed); |
159 | if (m_fixedElementsLayoutRelativeToFrame) |
160 | ts.dumpProperty("fixed elements lay out relative to frame" , m_fixedElementsLayoutRelativeToFrame); |
161 | } |
162 | |
163 | |
164 | } // namespace WebCore |
165 | |
166 | #endif // ENABLE(ASYNC_SCROLLING) |
167 | |