blob: f6cb6dddd14da47cb4095f83da3d3c46183d0c12 [file] [log] [blame]
/*
* Copyright (C) 2005 Frerich Raabe <raabe@kde.org>
* Copyright (C) 2006, 2009 Apple Inc. All rights reserved.
*
* 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"
#include "Document.h"
#include "XPathEvaluator.h"
namespace WebCore {
using namespace XPath;
XPathResult::XPathResult(Document& document, const Value& value)
: m_value(value)
{
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() = default;
ExceptionOr<void> XPathResult::convertTo(unsigned short type)
{
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())
return Exception { TypeError };
m_resultType = type;
break;
case ORDERED_NODE_ITERATOR_TYPE:
if (!m_value.isNodeSet())
return Exception { TypeError };
m_nodeSet.sort();
m_resultType = type;
break;
case ORDERED_NODE_SNAPSHOT_TYPE:
if (!m_value.isNodeSet())
return Exception { TypeError };
m_value.toNodeSet().sort();
m_resultType = type;
break;
}
return { };
}
unsigned short XPathResult::resultType() const
{
return m_resultType;
}
ExceptionOr<double> XPathResult::numberValue() const
{
if (resultType() != NUMBER_TYPE)
return Exception { TypeError };
return m_value.toNumber();
}
ExceptionOr<String> XPathResult::stringValue() const
{
if (resultType() != STRING_TYPE)
return Exception { TypeError };
return m_value.toString();
}
ExceptionOr<bool> XPathResult::booleanValue() const
{
if (resultType() != BOOLEAN_TYPE)
return Exception { TypeError };
return m_value.toBoolean();
}
ExceptionOr<Node*> XPathResult::singleNodeValue() const
{
if (resultType() != ANY_UNORDERED_NODE_TYPE && resultType() != FIRST_ORDERED_NODE_TYPE)
return Exception { TypeError };
auto& 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;
}
ExceptionOr<unsigned> XPathResult::snapshotLength() const
{
if (resultType() != UNORDERED_NODE_SNAPSHOT_TYPE && resultType() != ORDERED_NODE_SNAPSHOT_TYPE)
return Exception { TypeError };
return m_value.toNodeSet().size();
}
ExceptionOr<Node*> XPathResult::iterateNext()
{
if (resultType() != UNORDERED_NODE_ITERATOR_TYPE && resultType() != ORDERED_NODE_ITERATOR_TYPE)
return Exception { TypeError };
if (invalidIteratorState())
return Exception { InvalidStateError };
if (m_nodeSetPosition >= m_nodeSet.size())
return nullptr;
return m_nodeSet[m_nodeSetPosition++];
}
ExceptionOr<Node*> XPathResult::snapshotItem(unsigned index)
{
if (resultType() != UNORDERED_NODE_SNAPSHOT_TYPE && resultType() != ORDERED_NODE_SNAPSHOT_TYPE)
return Exception { TypeError };
auto& nodes = m_value.toNodeSet();
if (index >= nodes.size())
return nullptr;
return nodes[index];
}
}