void Step::evaluate(Node* context, NodeSet& nodes) const
{
EvaluationContext& evaluationContext = Expression::evaluationContext();
evaluationContext.position = 0;
nodesInAxis(context, nodes);
// Check predicates that couldn't be merged into node test.
for (unsigned i = 0; i < m_predicates.size(); i++) {
Predicate* predicate = m_predicates[i].get();
NodeSet newNodes;
if (!nodes.isSorted())
newNodes.markSorted(false);
for (unsigned j = 0; j < nodes.size(); j++) {
Node* node = nodes[j];
evaluationContext.node = node;
evaluationContext.size = nodes.size();
evaluationContext.position = j + 1;
if (predicate->evaluate())
newNodes.append(node);
}
nodes.swap(newNodes);
}
}
void Step::evaluate(EvaluationContext& evaluationContext, Node* context, NodeSet& nodes) const
{
evaluationContext.position = 0;
nodesInAxis(evaluationContext, context, nodes);
// Check predicates that couldn't be merged into node test.
for (unsigned i = 0; i < m_predicates.size(); i++) {
Predicate* predicate = m_predicates[i].get();
OwnPtrWillBeRawPtr<NodeSet> newNodes(NodeSet::create());
if (!nodes.isSorted())
newNodes->markSorted(false);
for (unsigned j = 0; j < nodes.size(); j++) {
Node* node = nodes[j];
evaluationContext.node = node;
evaluationContext.size = nodes.size();
evaluationContext.position = j + 1;
if (predicate->evaluate(evaluationContext))
newNodes->append(node);
}
nodes.swap(*newNodes);
}
}
void Step::evaluate(Node* context, NodeSet& nodes) const
{
nodesInAxis(context, nodes);
EvaluationContext& evaluationContext = Expression::evaluationContext();
for (unsigned i = 0; i < m_predicates.size(); i++) {
Predicate* predicate = m_predicates[i];
NodeSet newNodes;
if (!nodes.isSorted())
newNodes.markSorted(false);
evaluationContext.size = nodes.size();
evaluationContext.position = 1;
for (unsigned j = 0; j < nodes.size(); j++) {
Node* node = nodes[j];
Expression::evaluationContext().node = node;
EvaluationContext backupCtx = evaluationContext;
if (predicate->evaluate())
newNodes.append(node);
evaluationContext = backupCtx;
++evaluationContext.position;
}
nodes.swap(newNodes);
}
}
static inline bool nodeMatches(EvaluationContext& evaluationContext, Node* node, Step::Axis axis, const Step::NodeTest& nodeTest)
{
if (!nodeMatchesBasicTest(node, axis, nodeTest))
return false;
// Only the first merged predicate may depend on position.
++evaluationContext.position;
const WillBeHeapVector<OwnPtrWillBeMember<Predicate> >& mergedPredicates = nodeTest.mergedPredicates();
for (unsigned i = 0; i < mergedPredicates.size(); i++) {
Predicate* predicate = mergedPredicates[i].get();
evaluationContext.node = node;
// No need to set context size - we only get here when evaluating
// predicates that do not depend on it.
if (!predicate->evaluate(evaluationContext))
return false;
}
return true;
}