1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtDebug>
#include "qaxisstep_p.h"
#include "qcommonsequencetypes_p.h"
#include "qcommonvalues_p.h"
#include "qitemmappingiterator_p.h"
#include "qsequencemappingiterator_p.h"
#include "qpatternistlocale_p.h"
#include "qapplytemplate_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
ApplyTemplate::ApplyTemplate(const TemplateMode::Ptr &mode,
const WithParam::Hash &withParams,
const TemplateMode::Ptr &defaultMode) : TemplateInvoker(withParams)
, m_mode(mode)
, m_defaultMode(defaultMode)
{
Q_ASSERT_X(m_mode || m_defaultMode, Q_FUNC_INFO,
"Either a mode, or the default mode must be supplied.");
}
Item ApplyTemplate::mapToItem(const QXmlNodeModelIndex &node,
const DynamicContext::Ptr &) const
{
return Item(node);
}
Item::Iterator::Ptr ApplyTemplate::mapToSequence(const Item &item,
const DynamicContext::Ptr &context) const
{
Q_UNUSED(item);
return evaluateSequence(context);
}
TemplateMode::Ptr ApplyTemplate::effectiveMode(const DynamicContext::Ptr &context) const
{
if(m_mode)
return m_mode;
else
{
const TemplateMode::Ptr currentMode(context->currentTemplateMode());
if(currentMode)
return currentMode;
else
return m_defaultMode;
}
}
Template::Ptr ApplyTemplate::findTemplate(const DynamicContext::Ptr &context,
const TemplateMode::Ptr &templateMode) const
{
const int count = templateMode->templatePatterns.count();
Template::Ptr result;
/* It's redundant to initialize these values, but it suppresses false
* positives with GCC. */
PatternPriority priority = 0;
TemplatePattern::ID id = -1;
/* Possible optimization: detecting ambiguous rule matches could be forked off to a
* low prioirity thread. */
for(int i = 0; i < count; ++i)
{
const TemplatePattern::Ptr &candidate = templateMode->templatePatterns.at(i);
if(candidate->matchPattern()->evaluateEBV(context))
{
if(result)
{
if( candidate->id() != id
&& candidate->priority() == priority
&& candidate->templateTarget()->importPrecedence ==
result->importPrecedence)
{
context->error(QtXmlPatterns::tr("Ambiguous rule match."),
ReportContext::XTRE0540, this);
}
else
break;
}
else
{
result = candidate->templateTarget();
priority = candidate->priority();
id = candidate->id();
}
}
}
return result;
}
Item::Iterator::Ptr ApplyTemplate::evaluateSequence(const DynamicContext::Ptr &context) const
{
const TemplateMode::Ptr templateMode(effectiveMode(context));
const Template::Ptr &templateMatch = findTemplate(context, templateMode);
if(templateMatch)
return templateMatch->body->evaluateSequence(templateMatch->createContext(this, context, false));
else
{
/* None of our templates matched. Proceed with a built-in. */
const Item current(context->contextItem());
// TODO it can be an atomic value?
const QXmlNodeModelIndex::NodeKind kind(current.asNode().kind());
if(kind == QXmlNodeModelIndex::Element || kind == QXmlNodeModelIndex::Document)
{
pDebug() << "No template match, using builtin template for element() | document-node()";
const Item::Iterator::Ptr focusIterator(makeItemMappingIterator<Item>(ConstPtr(this),
current.asNode().iterate(QXmlNodeModelIndex::AxisChild),
context));
const DynamicContext::Ptr focus(context->createFocus());
focus->setFocusIterator(focusIterator);
return makeSequenceMappingIterator<Item>(ConstPtr(this), focusIterator, focus);
}
return CommonValues::emptyIterator;
}
}
Expression::Ptr ApplyTemplate::compress(const StaticContext::Ptr &context)
{
/* If we have a mode, we will never need the default mode. */
if(m_mode)
m_defaultMode.reset();
return TemplateInvoker::compress(context);
}
SequenceType::Ptr ApplyTemplate::staticType() const
{
return CommonSequenceTypes::ZeroOrMoreItems;
}
ExpressionVisitorResult::Ptr ApplyTemplate::accept(const ExpressionVisitor::Ptr &visitor) const
{
return visitor->visit(this);
}
Expression::Properties ApplyTemplate::properties() const
{
return RequiresFocus | DisableElimination;
}
bool ApplyTemplate::configureRecursion(const CallTargetDescription::Ptr &sign)
{
Q_ASSERT_X(false, Q_FUNC_INFO, "We're not expected to be called.");
Q_UNUSED(sign);
return false;
}
Expression::Ptr ApplyTemplate::body() const
{
Q_ASSERT_X(false, Q_FUNC_INFO, "We're not expected to be called.");
return Expression::Ptr();
}
CallTargetDescription::Ptr ApplyTemplate::callTargetDescription() const
{
Q_ASSERT_X(false, Q_FUNC_INFO, "We're not expected to be called.");
return CallTargetDescription::Ptr();
}
QT_END_NAMESPACE
|
