--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/xml/XPathResult.cpp Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,242 @@
+/*
+ * Copyright 2005 Frerich Raabe <raabe@kde.org>
+ * Copyright (C) 2006 Apple Computer, Inc.
+ *
+ * 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 THE AUTHOR ``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 THE AUTHOR 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 "XPathResult.h"
+
+#if ENABLE(XPATH)
+
+#include "EventListener.h"
+#include "EventNames.h"
+#include "EventTargetNode.h"
+#include "ExceptionCode.h"
+#include "XPathEvaluator.h"
+
+namespace WebCore {
+
+using namespace XPath;
+
+class InvalidatingEventListener : public EventListener {
+public:
+ InvalidatingEventListener(XPathResult* result) : m_result(result) { }
+ virtual void handleEvent(Event*, bool) { m_result->invalidateIteratorState(); }
+private:
+ XPathResult* m_result;
+};
+
+XPathResult::XPathResult(EventTargetNode* eventTarget, const Value& value)
+ : m_value(value)
+ , m_eventTarget(eventTarget)
+{
+ m_eventListener = new InvalidatingEventListener(this);
+ m_eventTarget->addEventListener(EventNames::DOMSubtreeModifiedEvent, m_eventListener, false);
+ switch (m_value.type()) {
+ case Value::BooleanValue:
+ m_resultType = BOOLEAN_TYPE;
+ return;
+ case Value::NumberValue:
+ m_resultType = NUMBER_TYPE;
+ return;
+ case Value::StringValue:
+ m_resultType = STRING_TYPE;
+ return;
+ case Value::NodeSetValue:
+ m_resultType = UNORDERED_NODE_ITERATOR_TYPE;
+ m_nodeSetPosition = 0;
+ m_nodeSet = m_value.toNodeSet();
+ m_invalidIteratorState = false;
+ return;
+ }
+ ASSERT_NOT_REACHED();
+}
+
+XPathResult::~XPathResult()
+{
+ if (m_eventTarget)
+ m_eventTarget->removeEventListener(EventNames::DOMSubtreeModifiedEvent, m_eventListener.get(), false);
+}
+
+void XPathResult::convertTo(unsigned short type, ExceptionCode& ec)
+{
+ switch (type) {
+ case ANY_TYPE:
+ break;
+ case NUMBER_TYPE:
+ m_resultType = type;
+ m_value = m_value.toNumber();
+ break;
+ case STRING_TYPE:
+ m_resultType = type;
+ m_value = m_value.toString();
+ break;
+ case BOOLEAN_TYPE:
+ m_resultType = type;
+ m_value = m_value.toBoolean();
+ break;
+ case UNORDERED_NODE_ITERATOR_TYPE:
+ case UNORDERED_NODE_SNAPSHOT_TYPE:
+ case ANY_UNORDERED_NODE_TYPE:
+ case FIRST_ORDERED_NODE_TYPE: // This is correct - singleNodeValue() will take care of ordering.
+ if (!m_value.isNodeSet()) {
+ ec = TYPE_ERR;
+ return;
+ }
+ m_resultType = type;
+ break;
+ case ORDERED_NODE_ITERATOR_TYPE:
+ if (!m_value.isNodeSet()) {
+ ec = TYPE_ERR;
+ return;
+ }
+ m_nodeSet.sort();
+ m_resultType = type;
+ break;
+ case ORDERED_NODE_SNAPSHOT_TYPE:
+ if (!m_value.isNodeSet()) {
+ ec = TYPE_ERR;
+ return;
+ }
+ m_value.toNodeSet().sort();
+ m_resultType = type;
+ break;
+ }
+}
+
+unsigned short XPathResult::resultType() const
+{
+ return m_resultType;
+}
+
+double XPathResult::numberValue(ExceptionCode& ec) const
+{
+ if (resultType() != NUMBER_TYPE) {
+ ec = TYPE_ERR;
+ return 0.0;
+ }
+ return m_value.toNumber();
+}
+
+String XPathResult::stringValue(ExceptionCode& ec) const
+{
+ if (resultType() != STRING_TYPE) {
+ ec = TYPE_ERR;
+ return String();
+ }
+ return m_value.toString();
+}
+
+bool XPathResult::booleanValue(ExceptionCode& ec) const
+{
+ if (resultType() != BOOLEAN_TYPE) {
+ ec = TYPE_ERR;
+ return false;
+ }
+ return m_value.toBoolean();
+}
+
+Node* XPathResult::singleNodeValue(ExceptionCode& ec) const
+{
+ if (resultType() != ANY_UNORDERED_NODE_TYPE && resultType() != FIRST_ORDERED_NODE_TYPE) {
+ ec = TYPE_ERR;
+ return 0;
+ }
+
+ const NodeSet& nodes = m_value.toNodeSet();
+ if (resultType() == FIRST_ORDERED_NODE_TYPE)
+ return nodes.firstNode();
+ else
+ return nodes.anyNode();
+}
+
+void XPathResult::invalidateIteratorState()
+{
+ m_invalidIteratorState = true;
+
+ ASSERT(m_eventTarget);
+ ASSERT(m_eventListener);
+
+ m_eventTarget->removeEventListener(EventNames::DOMSubtreeModifiedEvent, m_eventListener.get(), false);
+
+ m_eventTarget = 0;
+}
+
+bool XPathResult::invalidIteratorState() const
+{
+ if (resultType() != UNORDERED_NODE_ITERATOR_TYPE && resultType() != ORDERED_NODE_ITERATOR_TYPE)
+ return false;
+
+ return m_invalidIteratorState;
+}
+
+unsigned long XPathResult::snapshotLength(ExceptionCode& ec) const
+{
+ if (resultType() != UNORDERED_NODE_SNAPSHOT_TYPE && resultType() != ORDERED_NODE_SNAPSHOT_TYPE) {
+ ec = TYPE_ERR;
+ return 0;
+ }
+
+ return m_value.toNodeSet().size();
+}
+
+Node* XPathResult::iterateNext(ExceptionCode& ec)
+{
+ if (resultType() != UNORDERED_NODE_ITERATOR_TYPE && resultType() != ORDERED_NODE_ITERATOR_TYPE) {
+ ec = TYPE_ERR;
+ return 0;
+ }
+
+ if (m_invalidIteratorState) {
+ ec = INVALID_STATE_ERR;
+ return 0;
+ }
+
+ if (m_nodeSetPosition + 1 > m_nodeSet.size())
+ return 0;
+
+ Node* node = m_nodeSet[m_nodeSetPosition];
+
+ m_nodeSetPosition++;
+
+ return node;
+}
+
+Node* XPathResult::snapshotItem(unsigned long index, ExceptionCode& ec)
+{
+ if (resultType() != UNORDERED_NODE_SNAPSHOT_TYPE && resultType() != ORDERED_NODE_SNAPSHOT_TYPE) {
+ ec = TYPE_ERR;
+ return 0;
+ }
+
+ const NodeSet& nodes = m_value.toNodeSet();
+ if (index >= nodes.size())
+ return 0;
+
+ return nodes[index];
+}
+
+}
+
+#endif // ENABLE(XPATH)