void ScrollingTree::updateTreeFromStateNode(ScrollingStateNode* stateNode)
{
// This fuction recurses through the ScrollingStateTree and updates the corresponding ScrollingTreeNodes.
// Find the ScrollingTreeNode associated with the current stateNode using the shared ID and our HashMap.
ScrollingTreeNodeMap::const_iterator it = m_nodeMap.find(stateNode->scrollingNodeID());
if (it != m_nodeMap.end()) {
ScrollingTreeNode* node = it->value;
node->update(stateNode);
} else {
// If the node isn't found, it's either new and needs to be added to the tree, or there is a new ID for our
// root node.
ScrollingNodeID nodeID = stateNode->scrollingNodeID();
if (!stateNode->parent()) {
// This is the root node.
if (!m_rootNode)
m_rootNode = ScrollingTreeScrollingNode::create(this, nodeID);
m_nodeMap.set(nodeID, m_rootNode.get());
m_rootNode->update(stateNode);
} else {
OwnPtr<ScrollingTreeNode> newNode;
if (stateNode->isScrollingNode())
newNode = ScrollingTreeScrollingNode::create(this, nodeID);
else if (stateNode->isFixedNode())
newNode = ScrollingTreeFixedNode::create(this, nodeID);
else if (stateNode->isStickyNode())
newNode = ScrollingTreeStickyNode::create(this, nodeID);
else
ASSERT_NOT_REACHED();
ScrollingTreeNode* newNodeRawPtr = newNode.get();
m_nodeMap.set(nodeID, newNodeRawPtr);
ScrollingTreeNodeMap::const_iterator it = m_nodeMap.find(stateNode->parent()->scrollingNodeID());
ASSERT(it != m_nodeMap.end());
if (it != m_nodeMap.end()) {
ScrollingTreeNode* parent = it->value;
newNode->setParent(parent);
parent->appendChild(newNode.release());
}
newNodeRawPtr->update(stateNode);
}
}
// Now update the children if we have any.
Vector<OwnPtr<ScrollingStateNode> >* stateNodeChildren = stateNode->children();
if (!stateNodeChildren)
return;
size_t size = stateNodeChildren->size();
for (size_t i = 0; i < size; ++i)
updateTreeFromStateNode(stateNodeChildren->at(i).get());
}
void ScrollingTree::updateTreeFromStateNode(ScrollingStateNode* stateNode)
{
// This fuction recurses through the ScrollingStateTree and updates the corresponding ScrollingTreeNodes.
// Find the ScrollingTreeNode associated with the current stateNode using the shared ID and our HashMap.
ScrollingTreeNodeMap::const_iterator it = m_nodeMap.find(stateNode->scrollingNodeID());
if (it != m_nodeMap.end()) {
ScrollingTreeNode* node = it->value;
node->update(stateNode);
} else {
// If the node isn't found, it's either new and needs to be added to the tree, or there is a new ID for our
// root node.
if (!stateNode->parent()) {
// This is the root node.
m_rootNode->setScrollingNodeID(stateNode->scrollingNodeID());
m_nodeMap.set(stateNode->scrollingNodeID(), m_rootNode.get());
m_rootNode->update(stateNode);
} else {
// FIXME: In the future, we will have more than just ScrollingTreeScrollingNode, so we'll have to
// figure out which type of node to create.
OwnPtr<ScrollingTreeNode> newNode = ScrollingTreeScrollingNode::create(this);
ScrollingTreeNode* newNodeRawPtr = newNode.get();
m_nodeMap.set(stateNode->scrollingNodeID(), newNodeRawPtr);
ScrollingTreeNodeMap::const_iterator it = m_nodeMap.find(stateNode->parent()->scrollingNodeID());
ASSERT(it != m_nodeMap.end());
if (it != m_nodeMap.end()) {
ScrollingTreeNode* parent = it->value;
newNode->setParent(parent);
parent->appendChild(newNode.release());
}
newNodeRawPtr->update(stateNode);
}
}
// Now update the children if we have any.
Vector<OwnPtr<ScrollingStateNode> >* stateNodeChildren = stateNode->children();
if (!stateNodeChildren)
return;
size_t size = stateNodeChildren->size();
for (size_t i = 0; i < size; ++i)
updateTreeFromStateNode(stateNodeChildren->at(i).get());
}