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parsedstatement.cpp
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1 /*
2  * parsedstatement.cc - Copyright 2005 Frerich Raabe <raabe@kde.org>
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  */
25 #include "parsedstatement.h"
26 #include "path.h"
27 
28 #include "xml/dom_nodeimpl.h"
29 #include "xml/dom_nodelistimpl.h"
30 #include "xml/dom3_xpathimpl.h"
31 
32 using namespace DOM;
33 
34 namespace khtml {
35 namespace XPath {
36 
37 Expression *khtmlParseXPathStatement( const DOMString &statement, int& ec );
38 
39 ParsedStatement::ParsedStatement( const DOMString &statement, khtml::XPathNSResolverImpl* res )
40  : m_res( res ), m_expr( 0 ), m_ec( 0 )
41 {
42  parse( statement );
43 }
44 
45 ParsedStatement::~ParsedStatement()
46 {
47  delete m_expr;
48 }
49 
50 void ParsedStatement::parse( const DOMString &statement )
51 {
52  kDebug(6011) << "parsing:" << statement.string();
53  m_ec = 0;
54  delete m_expr;
55  Expression::evaluationContext().reset( 0, m_res.get() );
56 
57  m_expr = khtmlParseXPathStatement( statement, m_ec );
58 
59  kDebug(6011) << "AST:" << (m_expr ? m_expr->dump() : QString::fromLatin1("*** parse error ***"));
60 }
61 
62 void ParsedStatement::optimize()
63 {
64  if ( !m_expr ) {
65  return;
66  }
67  m_expr->optimize();
68 }
69 
70 Value ParsedStatement::evaluate(NodeImpl* context, int& ec) const
71 {
72  Expression::evaluationContext().reset(context, m_res.get());
73  Value res = m_expr->evaluate();
74  ec = Expression::evaluationContext().exceptionCode;
75 
76  // If the result is a nodeset, we need to put it in document order
77  // and remove duplicates.
78  if ( res.isNodeset() )
79  res.toNodeset()->normalizeUpto(StaticNodeListImpl::DocumentOrder);
80  return res;
81 }
82 
83 QString ParsedStatement::dump() const
84 {
85  return m_expr->dump();
86 }
87 
88 } // namespace XPath
89 } // namespace khtml
90 
91 // kate: indent-width 4; replace-tabs off; tab-width 4; space-indent off;
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