This source file includes following definitions.
- m_domTreeVersion
- convertTo
- resultType
- numberValue
- stringValue
- booleanValue
- singleNodeValue
- invalidIteratorState
- snapshotLength
- iterateNext
- snapshotItem
#include "config.h"
#include "core/xml/XPathResult.h"
#include "bindings/v8/ExceptionState.h"
#include "core/dom/Document.h"
#include "core/dom/ExceptionCode.h"
#include "core/xml/XPathEvaluator.h"
namespace WebCore {
using namespace XPath;
XPathResult::XPathResult(Document* document, const Value& value)
: m_value(value)
, m_nodeSetPosition(0)
, m_domTreeVersion(0)
{
ScriptWrappable::init(this);
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_document = document;
m_domTreeVersion = document->domTreeVersion();
return;
}
ASSERT_NOT_REACHED();
}
XPathResult::~XPathResult()
{
}
void XPathResult::convertTo(unsigned short type, ExceptionState& exceptionState)
{
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:
if (!m_value.isNodeSet()) {
exceptionState.throwTypeError("The result is not a node set, and therefore cannot be converted to the desired type.");
return;
}
m_resultType = type;
break;
case ORDERED_NODE_ITERATOR_TYPE:
if (!m_value.isNodeSet()) {
exceptionState.throwTypeError("The result is not a node set, and therefore cannot be converted to the desired type.");
return;
}
m_nodeSet.sort();
m_resultType = type;
break;
case ORDERED_NODE_SNAPSHOT_TYPE:
if (!m_value.isNodeSet()) {
exceptionState.throwTypeError("The result is not a node set, and therefore cannot be converted to the desired type.");
return;
}
m_value.toNodeSet().sort();
m_resultType = type;
break;
}
}
unsigned short XPathResult::resultType() const
{
return m_resultType;
}
double XPathResult::numberValue(ExceptionState& exceptionState) const
{
if (resultType() != NUMBER_TYPE) {
exceptionState.throwTypeError("The result type is not a number.");
return 0.0;
}
return m_value.toNumber();
}
String XPathResult::stringValue(ExceptionState& exceptionState) const
{
if (resultType() != STRING_TYPE) {
exceptionState.throwTypeError("The result type is not a string.");
return String();
}
return m_value.toString();
}
bool XPathResult::booleanValue(ExceptionState& exceptionState) const
{
if (resultType() != BOOLEAN_TYPE) {
exceptionState.throwTypeError("The result type is not a boolean.");
return false;
}
return m_value.toBoolean();
}
Node* XPathResult::singleNodeValue(ExceptionState& exceptionState) const
{
if (resultType() != ANY_UNORDERED_NODE_TYPE && resultType() != FIRST_ORDERED_NODE_TYPE) {
exceptionState.throwTypeError("The result type is not a single node.");
return 0;
}
const NodeSet& nodes = m_value.toNodeSet();
if (resultType() == FIRST_ORDERED_NODE_TYPE)
return nodes.firstNode();
else
return nodes.anyNode();
}
bool XPathResult::invalidIteratorState() const
{
if (resultType() != UNORDERED_NODE_ITERATOR_TYPE && resultType() != ORDERED_NODE_ITERATOR_TYPE)
return false;
ASSERT(m_document);
return m_document->domTreeVersion() != m_domTreeVersion;
}
unsigned long XPathResult::snapshotLength(ExceptionState& exceptionState) const
{
if (resultType() != UNORDERED_NODE_SNAPSHOT_TYPE && resultType() != ORDERED_NODE_SNAPSHOT_TYPE) {
exceptionState.throwTypeError("The result type is not a snapshot.");
return 0;
}
return m_value.toNodeSet().size();
}
Node* XPathResult::iterateNext(ExceptionState& exceptionState)
{
if (resultType() != UNORDERED_NODE_ITERATOR_TYPE && resultType() != ORDERED_NODE_ITERATOR_TYPE) {
exceptionState.throwTypeError("The result type is not an iterator.");
return 0;
}
if (invalidIteratorState()) {
exceptionState.throwDOMException(InvalidStateError, "The document has mutated since the result was returned.");
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, ExceptionState& exceptionState)
{
if (resultType() != UNORDERED_NODE_SNAPSHOT_TYPE && resultType() != ORDERED_NODE_SNAPSHOT_TYPE) {
exceptionState.throwTypeError("The result type is not a snapshot.");
return 0;
}
const NodeSet& nodes = m_value.toNodeSet();
if (index >= nodes.size())
return 0;
return nodes[index];
}
}