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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
32using namespace DOM;
33
34namespace khtml {
35namespace XPath {
36
37Expression *khtmlParseXPathStatement( const DOMString &statement, int& ec );
38
39ParsedStatement::ParsedStatement( const DOMString &statement, khtml::XPathNSResolverImpl* res )
40 : m_res( res ), m_expr( 0 ), m_ec( 0 )
41{
42 parse( statement );
43}
44
45ParsedStatement::~ParsedStatement()
46{
47 delete m_expr;
48}
49
50void 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
62void ParsedStatement::optimize()
63{
64 if ( !m_expr ) {
65 return;
66 }
67 m_expr->optimize();
68}
69
70Value 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
83QString 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;
DOM::DOMString
This class implements the basic string we use in the DOM.
Definition: dom_string.h:44
DOM::DOMString::string
QString string() const
Definition: dom_string.cpp:236
khtml::XPath::Expression::evaluationContext
static EvaluationContext & evaluationContext()
Definition: expression.cpp:212
khtml::XPath::Expression::evaluate
virtual Value evaluate() const
Definition: expression.cpp:229
khtml::XPath::Expression::optimize
void optimize()
Definition: expression.cpp:242
khtml::XPath::Expression::dump
virtual QString dump() const =0
khtml::XPath::ParsedStatement::dump
QString dump() const
Definition: parsedstatement.cpp:83
khtml::XPath::ParsedStatement::evaluate
Value evaluate(DOM::NodeImpl *context, int &ec) const
Definition: parsedstatement.cpp:70
khtml::XPath::ParsedStatement::optimize
void optimize()
Definition: parsedstatement.cpp:62
khtml::XPath::ParsedStatement::ParsedStatement
ParsedStatement(const DOM::DOMString &statement, khtml::XPathNSResolverImpl *res)
Definition: parsedstatement.cpp:39
khtml::XPath::ParsedStatement::~ParsedStatement
~ParsedStatement()
Definition: parsedstatement.cpp:45
khtml::XPath::Value
Definition: expression.h:76
khtml::XPath::Value::isNodeset
bool isNodeset() const
Definition: expression.cpp:86
khtml::XPath::Value::toNodeset
DomNodeList & toNodeset()
Definition: expression.cpp:106
kDebug
#define kDebug
DOM
This library provides a full-featured HTML parser and widget.
Definition: design.h:55
khtml::XPath::khtmlParseXPathStatement
Expression * khtmlParseXPathStatement(const DOMString &statement, int &ec)
Definition: parser.cpp:2170
khtml
parsedstatement.h
path.h
khtml::XPath::EvaluationContext::reset
void reset(DOM::NodeImpl *ctx, XPathNSResolverImpl *res)
Definition: expression.h:51
khtml::XPath::EvaluationContext::exceptionCode
int exceptionCode
Definition: expression.h:67
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