File indexing completed on 2024-04-21 11:31:22

 /*
  * parsedstatement.cc - Copyright 2005 Frerich Raabe <raabe@kde.org>
  *
  * 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 "parsedstatement.h"
 #include "path.h"
 
 #include "xml/dom_nodeimpl.h"
 #include "xml/dom_nodelistimpl.h"
 #include "xml/dom3_xpathimpl.h"
 
 using namespace DOM;
 
 namespace khtml
 {
 namespace XPath
 {
 
 Expression *khtmlParseXPathStatement(const DOMString &statement, int &ec);
 
 ParsedStatement::ParsedStatement(const DOMString &statement, khtml::XPathNSResolverImpl *res)
     : m_res(res), m_expr(nullptr), m_ec(0)
 {
     parse(statement);
 }
 
 ParsedStatement::~ParsedStatement()
 {
     delete m_expr;
 }
 
 void ParsedStatement::parse(const DOMString &statement)
 {
     // qCDebug(KHTML_LOG) << "parsing:" << statement.string();
     m_ec = 0;
     delete m_expr;
     Expression::evaluationContext().reset(nullptr, m_res.get());
 
     m_expr = khtmlParseXPathStatement(statement, m_ec);
 
     // qCDebug(KHTML_LOG) << "AST:" << (m_expr ? m_expr->dump() : QString::fromLatin1("*** parse error ***"));
 }
 
 void ParsedStatement::optimize()
 {
     if (!m_expr) {
         return;
     }
     m_expr->optimize();
 }
 
 Value ParsedStatement::evaluate(NodeImpl *context, int &ec) const
 {
     Expression::evaluationContext().reset(context, m_res.get());
     Value res = m_expr->evaluate();
     ec = Expression::evaluationContext().exceptionCode;
 
     // If the result is a nodeset, we need to put it in document order
     // and remove duplicates.
     if (res.isNodeset()) {
         res.toNodeset()->normalizeUpto(StaticNodeListImpl::DocumentOrder);
     }
     return res;
 }
 
 QString ParsedStatement::dump() const
 {
     return m_expr->dump();
 }
 
 } // namespace XPath
 } // namespace khtml