| /* |
| * 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 "core/xml/XPathExpression.h" |
| |
| #include "bindings/v8/ExceptionState.h" |
| #include "core/dom/ExceptionCode.h" |
| #include "core/xml/XPathExpressionNode.h" |
| #include "core/xml/XPathNSResolver.h" |
| #include "core/xml/XPathParser.h" |
| #include "core/xml/XPathResult.h" |
| #include "core/xml/XPathUtil.h" |
| #include "wtf/text/WTFString.h" |
| |
| namespace WebCore { |
| |
| using namespace XPath; |
| |
| PassRefPtr<XPathExpression> XPathExpression::createExpression(const String& expression, XPathNSResolver* resolver, ExceptionState& es) |
| { |
| RefPtr<XPathExpression> expr = XPathExpression::create(); |
| Parser parser; |
| |
| expr->m_topExpression = parser.parseStatement(expression, resolver, es); |
| if (!expr->m_topExpression) |
| return 0; |
| |
| return expr.release(); |
| } |
| |
| XPathExpression::~XPathExpression() |
| { |
| delete m_topExpression; |
| } |
| |
| PassRefPtr<XPathResult> XPathExpression::evaluate(Node* contextNode, unsigned short type, XPathResult*, ExceptionState& es) |
| { |
| if (!isValidContextNode(contextNode)) { |
| es.throwUninformativeAndGenericDOMException(NotSupportedError); |
| return 0; |
| } |
| |
| EvaluationContext& evaluationContext = Expression::evaluationContext(); |
| evaluationContext.node = contextNode; |
| evaluationContext.size = 1; |
| evaluationContext.position = 1; |
| evaluationContext.hadTypeConversionError = false; |
| RefPtr<XPathResult> result = XPathResult::create(&contextNode->document(), m_topExpression->evaluate()); |
| evaluationContext.node = 0; // Do not hold a reference to the context node, as this may prevent the whole document from being destroyed in time. |
| |
| if (evaluationContext.hadTypeConversionError) { |
| // It is not specified what to do if type conversion fails while evaluating an expression. |
| es.throwUninformativeAndGenericDOMException(SyntaxError); |
| return 0; |
| } |
| |
| if (type != XPathResult::ANY_TYPE) { |
| result->convertTo(type, es); |
| if (es.hadException()) |
| return 0; |
| } |
| |
| return result; |
| } |
| |
| } |