path: root/Source/WebCore/page/scrolling/ScrollingStateFrameScrollingNode.cpp

/*
 * Copyright (C) 2014, 2016 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "ScrollingStateFrameScrollingNode.h"

#if ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS)

#include "ScrollingStateTree.h"
#include "TextStream.h"

namespace WebCore {

Ref<ScrollingStateFrameScrollingNode> ScrollingStateFrameScrollingNode::create(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
{
    return adoptRef(*new ScrollingStateFrameScrollingNode(stateTree, nodeID));
}

ScrollingStateFrameScrollingNode::ScrollingStateFrameScrollingNode(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
    : ScrollingStateScrollingNode(stateTree, FrameScrollingNode, nodeID)
{
}

ScrollingStateFrameScrollingNode::ScrollingStateFrameScrollingNode(const ScrollingStateFrameScrollingNode& stateNode, ScrollingStateTree& adoptiveTree)
    : ScrollingStateScrollingNode(stateNode, adoptiveTree)
#if PLATFORM(MAC)
    , m_verticalScrollerImp(stateNode.verticalScrollerImp())
    , m_horizontalScrollerImp(stateNode.horizontalScrollerImp())
#endif
    , m_eventTrackingRegions(stateNode.eventTrackingRegions())
    , m_requestedScrollPosition(stateNode.requestedScrollPosition())
    , m_layoutViewport(stateNode.layoutViewport())
    , m_minLayoutViewportOrigin(stateNode.minLayoutViewportOrigin())
    , m_maxLayoutViewportOrigin(stateNode.maxLayoutViewportOrigin())
    , m_frameScaleFactor(stateNode.frameScaleFactor())
    , m_topContentInset(stateNode.topContentInset())
    , m_headerHeight(stateNode.headerHeight())
    , m_footerHeight(stateNode.footerHeight())
    , m_synchronousScrollingReasons(stateNode.synchronousScrollingReasons())
    , m_behaviorForFixed(stateNode.scrollBehaviorForFixedElements())
    , m_requestedScrollPositionRepresentsProgrammaticScroll(stateNode.requestedScrollPositionRepresentsProgrammaticScroll())
    , m_fixedElementsLayoutRelativeToFrame(stateNode.fixedElementsLayoutRelativeToFrame())
    , m_visualViewportEnabled(stateNode.visualViewportEnabled())
{
    if (hasChangedProperty(ScrolledContentsLayer))
        setScrolledContentsLayer(stateNode.scrolledContentsLayer().toRepresentation(adoptiveTree.preferredLayerRepresentation()));

    if (hasChangedProperty(CounterScrollingLayer))
        setCounterScrollingLayer(stateNode.counterScrollingLayer().toRepresentation(adoptiveTree.preferredLayerRepresentation()));

    if (hasChangedProperty(InsetClipLayer))
        setInsetClipLayer(stateNode.insetClipLayer().toRepresentation(adoptiveTree.preferredLayerRepresentation()));

    if (hasChangedProperty(ContentShadowLayer))
        setContentShadowLayer(stateNode.contentShadowLayer().toRepresentation(adoptiveTree.preferredLayerRepresentation()));

    if (hasChangedProperty(HeaderLayer))
        setHeaderLayer(stateNode.headerLayer().toRepresentation(adoptiveTree.preferredLayerRepresentation()));

    if (hasChangedProperty(FooterLayer))
        setFooterLayer(stateNode.footerLayer().toRepresentation(adoptiveTree.preferredLayerRepresentation()));
}

ScrollingStateFrameScrollingNode::~ScrollingStateFrameScrollingNode()
{
}

Ref<ScrollingStateNode> ScrollingStateFrameScrollingNode::clone(ScrollingStateTree& adoptiveTree)
{
    return adoptRef(*new ScrollingStateFrameScrollingNode(*this, adoptiveTree));
}

void ScrollingStateFrameScrollingNode::setFrameScaleFactor(float scaleFactor)
{
    if (m_frameScaleFactor == scaleFactor)
        return;

    m_frameScaleFactor = scaleFactor;

    setPropertyChanged(FrameScaleFactor);
}

void ScrollingStateFrameScrollingNode::setEventTrackingRegions(const EventTrackingRegions& eventTrackingRegions)
{
    if (m_eventTrackingRegions == eventTrackingRegions)
        return;

    m_eventTrackingRegions = eventTrackingRegions;
    setPropertyChanged(EventTrackingRegion);
}

void ScrollingStateFrameScrollingNode::setSynchronousScrollingReasons(SynchronousScrollingReasons reasons)
{
    if (m_synchronousScrollingReasons == reasons)
        return;

    m_synchronousScrollingReasons = reasons;
    setPropertyChanged(ReasonsForSynchronousScrolling);
}

void ScrollingStateFrameScrollingNode::setScrollBehaviorForFixedElements(ScrollBehaviorForFixedElements behaviorForFixed)
{
    if (m_behaviorForFixed == behaviorForFixed)
        return;

    m_behaviorForFixed = behaviorForFixed;
    setPropertyChanged(BehaviorForFixedElements);
}

void ScrollingStateFrameScrollingNode::setLayoutViewport(const FloatRect& r)
{
    if (m_layoutViewport == r)
        return;

    m_layoutViewport = r;
    setPropertyChanged(LayoutViewport);
}

void ScrollingStateFrameScrollingNode::setMinLayoutViewportOrigin(const FloatPoint& p)
{
    if (m_minLayoutViewportOrigin == p)
        return;

    m_minLayoutViewportOrigin = p;
    setPropertyChanged(MinLayoutViewportOrigin);
}

void ScrollingStateFrameScrollingNode::setMaxLayoutViewportOrigin(const FloatPoint& p)
{
    if (m_maxLayoutViewportOrigin == p)
        return;

    m_maxLayoutViewportOrigin = p;
    setPropertyChanged(MaxLayoutViewportOrigin);
}

void ScrollingStateFrameScrollingNode::setHeaderHeight(int headerHeight)
{
    if (m_headerHeight == headerHeight)
        return;

    m_headerHeight = headerHeight;
    setPropertyChanged(HeaderHeight);
}

void ScrollingStateFrameScrollingNode::setFooterHeight(int footerHeight)
{
    if (m_footerHeight == footerHeight)
        return;

    m_footerHeight = footerHeight;
    setPropertyChanged(FooterHeight);
}

void ScrollingStateFrameScrollingNode::setTopContentInset(float topContentInset)
{
    if (m_topContentInset == topContentInset)
        return;

    m_topContentInset = topContentInset;
    setPropertyChanged(TopContentInset);
}

void ScrollingStateFrameScrollingNode::setScrolledContentsLayer(const LayerRepresentation& layerRepresentation)
{
    if (layerRepresentation == m_scrolledContentsLayer)
        return;
    
    m_scrolledContentsLayer = layerRepresentation;
    setPropertyChanged(ScrolledContentsLayer);
}

void ScrollingStateFrameScrollingNode::setCounterScrollingLayer(const LayerRepresentation& layerRepresentation)
{
    if (layerRepresentation == m_counterScrollingLayer)
        return;
    
    m_counterScrollingLayer = layerRepresentation;
    setPropertyChanged(CounterScrollingLayer);
}

void ScrollingStateFrameScrollingNode::setInsetClipLayer(const LayerRepresentation& layerRepresentation)
{
    if (layerRepresentation == m_insetClipLayer)
        return;
    
    m_insetClipLayer = layerRepresentation;
    setPropertyChanged(InsetClipLayer);
}

void ScrollingStateFrameScrollingNode::setContentShadowLayer(const LayerRepresentation& layerRepresentation)
{
    if (layerRepresentation == m_contentShadowLayer)
        return;
    
    m_contentShadowLayer = layerRepresentation;
    setPropertyChanged(ContentShadowLayer);
}

void ScrollingStateFrameScrollingNode::setHeaderLayer(const LayerRepresentation& layerRepresentation)
{
    if (layerRepresentation == m_headerLayer)
        return;
    
    m_headerLayer = layerRepresentation;
    setPropertyChanged(HeaderLayer);
}

void ScrollingStateFrameScrollingNode::setFooterLayer(const LayerRepresentation& layerRepresentation)
{
    if (layerRepresentation == m_footerLayer)
        return;
    
    m_footerLayer = layerRepresentation;
    setPropertyChanged(FooterLayer);
}

void ScrollingStateFrameScrollingNode::setFixedElementsLayoutRelativeToFrame(bool fixedElementsLayoutRelativeToFrame)
{
    if (fixedElementsLayoutRelativeToFrame == m_fixedElementsLayoutRelativeToFrame)
        return;
    
    m_fixedElementsLayoutRelativeToFrame = fixedElementsLayoutRelativeToFrame;
    setPropertyChanged(FixedElementsLayoutRelativeToFrame);
}

// Only needed while visual viewports are runtime-switchable.
void ScrollingStateFrameScrollingNode::setVisualViewportEnabled(bool visualViewportEnabled)
{
    if (visualViewportEnabled == m_visualViewportEnabled)
        return;
    
    m_visualViewportEnabled = visualViewportEnabled;
    setPropertyChanged(VisualViewportEnabled);
}

#if !PLATFORM(MAC)
void ScrollingStateFrameScrollingNode::setScrollerImpsFromScrollbars(Scrollbar*, Scrollbar*)
{
}
#endif

void ScrollingStateFrameScrollingNode::dumpProperties(TextStream& ts, int indent, ScrollingStateTreeAsTextBehavior behavior) const
{
    ts << "(Frame scrolling node" << "\n";
    
    ScrollingStateScrollingNode::dumpProperties(ts, indent, behavior);
    
    if (m_frameScaleFactor != 1) {
        writeIndent(ts, indent + 1);
        ts << "(frame scale factor " << m_frameScaleFactor << ")\n";
    }
    
    if (m_visualViewportEnabled) {
        writeIndent(ts, indent + 1);
        ts << "(layout viewport " << m_layoutViewport << ")\n";
        writeIndent(ts, indent + 1);
        ts << "(min layout viewport origin " << m_minLayoutViewportOrigin << ")\n";
        writeIndent(ts, indent + 1);
        ts << "(max layout viewport origin " << m_maxLayoutViewportOrigin << ")\n";
    }
    
    if (m_behaviorForFixed == StickToViewportBounds) {
        writeIndent(ts, indent + 1);
        ts << "(fixed behavior: stick to viewport)\n";
    }

    if (!m_eventTrackingRegions.asynchronousDispatchRegion.isEmpty()) {
        ++indent;
        writeIndent(ts, indent);
        ts << "(asynchronous event dispatch region";
        ++indent;
        for (auto rect : m_eventTrackingRegions.asynchronousDispatchRegion.rects()) {
            ts << "\n";
            writeIndent(ts, indent);
            ts << rect;
        }
        ts << ")\n";
        indent -= 2;
    }
    if (!m_eventTrackingRegions.eventSpecificSynchronousDispatchRegions.isEmpty()) {
        for (const auto& synchronousEventRegion : m_eventTrackingRegions.eventSpecificSynchronousDispatchRegions) {
            ++indent;
            writeIndent(ts, indent);
            ts << "(synchronous event dispatch region for event " << synchronousEventRegion.key;
            ++indent;
            for (auto rect : synchronousEventRegion.value.rects()) {
                ts << "\n";
                writeIndent(ts, indent);
                ts << rect;
            }
            ts << ")\n";
            indent -= 2;
        }
    }

    if (m_synchronousScrollingReasons) {
        writeIndent(ts, indent + 1);
        ts << "(Scrolling on main thread because: " << ScrollingCoordinator::synchronousScrollingReasonsAsText(m_synchronousScrollingReasons) << ")\n";
    }
    
    // FIXME: dump more properties.
}

} // namespace WebCore

#endif // ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS)