blob: 9b1c16f8863f77217474f91d2c2c9821e1816299 [file] [log] [blame]
/*
* Copyright (C) 2012 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 "ScrollingTreeNode.h"
#if ENABLE(ASYNC_SCROLLING)
#include "ScrollingStateTree.h"
#include "ScrollingTree.h"
#include "ScrollingTreeFrameScrollingNode.h"
#include <wtf/text/TextStream.h>
namespace WebCore {
ScrollingTreeNode::ScrollingTreeNode(ScrollingTree& scrollingTree, ScrollingNodeType nodeType, ScrollingNodeID nodeID)
: m_scrollingTree(scrollingTree)
, m_nodeType(nodeType)
, m_nodeID(nodeID)
, m_parent(nullptr)
{
}
ScrollingTreeNode::~ScrollingTreeNode() = default;
void ScrollingTreeNode::appendChild(Ref<ScrollingTreeNode>&& childNode)
{
childNode->setParent(this);
if (!m_children)
m_children = std::make_unique<Vector<RefPtr<ScrollingTreeNode>>>();
m_children->append(WTFMove(childNode));
}
void ScrollingTreeNode::removeChild(ScrollingTreeNode& node)
{
if (!m_children)
return;
size_t index = m_children->find(&node);
// The index will be notFound if the node to remove is a deeper-than-1-level descendant or
// if node is the root state node.
if (index != notFound) {
m_children->remove(index);
return;
}
for (auto& child : *m_children)
child->removeChild(node);
}
bool ScrollingTreeNode::isRootNode() const
{
return m_scrollingTree.rootNode() == this;
}
void ScrollingTreeNode::relatedNodeScrollPositionDidChange(const ScrollingTreeScrollingNode&, const FloatRect& layoutViewport, FloatSize& cumulativeDelta)
{
applyLayerPositions(layoutViewport, cumulativeDelta);
}
void ScrollingTreeNode::dumpProperties(TextStream& ts, ScrollingStateTreeAsTextBehavior behavior) const
{
if (behavior & ScrollingStateTreeAsTextBehaviorIncludeNodeIDs)
ts.dumpProperty("nodeID", scrollingNodeID());
}
ScrollingTreeFrameScrollingNode* ScrollingTreeNode::enclosingFrameNodeIncludingSelf()
{
auto* node = this;
while (node && !node->isFrameScrollingNode())
node = node->parent();
return downcast<ScrollingTreeFrameScrollingNode>(node);
}
ScrollingTreeScrollingNode* ScrollingTreeNode::enclosingScrollingNodeIncludingSelf()
{
auto* node = this;
while (node && !node->isScrollingNode())
node = node->parent();
return downcast<ScrollingTreeScrollingNode>(node);
}
void ScrollingTreeNode::dump(TextStream& ts, ScrollingStateTreeAsTextBehavior behavior) const
{
dumpProperties(ts, behavior);
if (m_children) {
for (auto& child : *m_children) {
TextStream::GroupScope scope(ts);
child->dump(ts, behavior);
}
}
}
ScrollingTreeScrollingNode* ScrollingTreeNode::scrollingNodeForPoint(LayoutPoint parentPoint) const
{
LayoutPoint localPoint = parentToLocalPoint(parentPoint);
LayoutPoint contentsPoint = localToContentsPoint(localPoint);
if (children()) {
for (auto iterator = children()->rbegin(), end = children()->rend(); iterator != end; iterator++) {
if (auto node = (**iterator).scrollingNodeForPoint(contentsPoint))
return node;
}
}
return nullptr;
}
} // namespace WebCore
#endif // ENABLE(ASYNC_SCROLLING)