void NodeSet::sort() const
{
if (m_isSorted)
return;
unsigned nodeCount = m_nodes.size();
if (nodeCount < 2) {
m_isSorted = true;
return;
}
if (nodeCount > traversalSortCutoff) {
traversalSort();
return;
}
bool containsAttributeNodes = false;
Vector<Vector<Node*>> parentMatrix(nodeCount);
for (unsigned i = 0; i < nodeCount; ++i) {
Vector<Node*>& parentsVector = parentMatrix[i];
Node* node = m_nodes[i].get();
parentsVector.append(node);
if (is<Attr>(*node)) {
node = downcast<Attr>(*node).ownerElement();
parentsVector.append(node);
containsAttributeNodes = true;
}
while ((node = node->parentNode()))
parentsVector.append(node);
}
sortBlock(0, nodeCount, parentMatrix, containsAttributeNodes);
// It is not possible to just assign the result to m_nodes, because some nodes may get dereferenced and destroyed.
Vector<RefPtr<Node>> sortedNodes;
sortedNodes.reserveInitialCapacity(nodeCount);
for (unsigned i = 0; i < nodeCount; ++i)
sortedNodes.append(parentMatrix[i][0]);
m_nodes = WTF::move(sortedNodes);
m_isSorted = true;
}
void NodeSet::sort() const
{
if (m_isSorted)
return;
unsigned nodeCount = m_nodes.size();
if (nodeCount < 2) {
const_cast<bool&>(m_isSorted) = true;
return;
}
if (nodeCount > traversalSortCutoff) {
traversalSort();
return;
}
bool containsAttributeNodes = false;
WillBeHeapVector<NodeSetVector> parentMatrix(nodeCount);
for (unsigned i = 0; i < nodeCount; ++i) {
NodeSetVector& parentsVector = parentMatrix[i];
Node* n = m_nodes[i].get();
parentsVector.append(n);
if (n->isAttributeNode()) {
n = toAttr(n)->ownerElement();
parentsVector.append(n);
containsAttributeNodes = true;
}
while ((n = n->parentNode()))
parentsVector.append(n);
}
sortBlock(0, nodeCount, parentMatrix, containsAttributeNodes);
// It is not possible to just assign the result to m_nodes, because some
// nodes may get dereferenced and destroyed.
WillBeHeapVector<RefPtrWillBeMember<Node> > sortedNodes;
sortedNodes.reserveInitialCapacity(nodeCount);
for (unsigned i = 0; i < nodeCount; ++i)
sortedNodes.append(parentMatrix[i][0]);
const_cast<WillBeHeapVector<RefPtrWillBeMember<Node> >&>(m_nodes).swap(sortedNodes);
}
void NodeSet::sort() const
{
if (m_isSorted)
return;
unsigned nodeCount = m_nodes.size();
if (nodeCount < 2) {
const_cast<bool&>(m_isSorted) = true;
return;
}
bool containsAttributeNodes = false;
Vector<Vector<Node*> > parentMatrix(nodeCount);
for (unsigned i = 0; i < nodeCount; ++i) {
Vector<Node*>& parentsVector = parentMatrix[i];
Node* n = m_nodes[i].get();
parentsVector.append(n);
if (n->isAttributeNode()) {
n = static_cast<Attr*>(n)->ownerElement();
parentsVector.append(n);
containsAttributeNodes = true;
}
while ((n = n->parent()))
parentsVector.append(n);
}
sortBlock(0, nodeCount, parentMatrix, containsAttributeNodes);
// It is not possible to just assign the result to m_nodes, because some nodes may get dereferenced and destroyed.
Vector<RefPtr<Node> > sortedNodes;
sortedNodes.reserveCapacity(nodeCount);
for (unsigned i = 0; i < nodeCount; ++i)
sortedNodes.append(parentMatrix[i][0]);
const_cast<Vector<RefPtr<Node> >& >(m_nodes).swap(sortedNodes);
}
static void sortBlock(unsigned from, unsigned to, WillBeHeapVector<NodeSetVector>& parentMatrix, bool mayContainAttributeNodes)
{
// Should not call this function with less that two nodes to sort.
ASSERT(from + 1 < to);
unsigned minDepth = UINT_MAX;
for (unsigned i = from; i < to; ++i) {
unsigned depth = parentMatrix[i].size() - 1;
if (minDepth > depth)
minDepth = depth;
}
// Find the common ancestor.
unsigned commonAncestorDepth = minDepth;
Node* commonAncestor;
while (true) {
commonAncestor = parentWithDepth(commonAncestorDepth, parentMatrix[from]);
if (commonAncestorDepth == 0)
break;
bool allEqual = true;
for (unsigned i = from + 1; i < to; ++i) {
if (commonAncestor != parentWithDepth(commonAncestorDepth, parentMatrix[i])) {
allEqual = false;
break;
}
}
if (allEqual)
break;
--commonAncestorDepth;
}
if (commonAncestorDepth == minDepth) {
// One of the nodes is the common ancestor => it is the first in
// document order. Find it and move it to the beginning.
for (unsigned i = from; i < to; ++i) {
if (commonAncestor == parentMatrix[i][0]) {
parentMatrix[i].swap(parentMatrix[from]);
if (from + 2 < to)
sortBlock(from + 1, to, parentMatrix, mayContainAttributeNodes);
return;
}
}
}
if (mayContainAttributeNodes && commonAncestor->isElementNode()) {
// The attribute nodes and namespace nodes of an element occur before
// the children of the element. The namespace nodes are defined to occur
// before the attribute nodes. The relative order of namespace nodes is
// implementation-dependent. The relative order of attribute nodes is
// implementation-dependent.
unsigned sortedEnd = from;
// FIXME: namespace nodes are not implemented.
for (unsigned i = sortedEnd; i < to; ++i) {
Node* n = parentMatrix[i][0];
if (n->isAttributeNode() && toAttr(n)->ownerElement() == commonAncestor)
parentMatrix[i].swap(parentMatrix[sortedEnd++]);
}
if (sortedEnd != from) {
if (to - sortedEnd > 1)
sortBlock(sortedEnd, to, parentMatrix, mayContainAttributeNodes);
return;
}
}
// Children nodes of the common ancestor induce a subdivision of our
// node-set. Sort it according to this subdivision, and recursively sort
// each group.
WillBeHeapHashSet<RawPtrWillBeMember<Node> > parentNodes;
for (unsigned i = from; i < to; ++i)
parentNodes.add(parentWithDepth(commonAncestorDepth + 1, parentMatrix[i]));
unsigned previousGroupEnd = from;
unsigned groupEnd = from;
for (Node* n = commonAncestor->firstChild(); n; n = n->nextSibling()) {
// If parentNodes contains the node, perform a linear search to move its
// children in the node-set to the beginning.
if (parentNodes.contains(n)) {
for (unsigned i = groupEnd; i < to; ++i) {
if (parentWithDepth(commonAncestorDepth + 1, parentMatrix[i]) == n)
parentMatrix[i].swap(parentMatrix[groupEnd++]);
}
if (groupEnd - previousGroupEnd > 1)
sortBlock(previousGroupEnd, groupEnd, parentMatrix, mayContainAttributeNodes);
ASSERT(previousGroupEnd != groupEnd);
previousGroupEnd = groupEnd;
#ifndef NDEBUG
parentNodes.remove(n);
#endif
}
}
ASSERT(parentNodes.isEmpty());
}