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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qdynamiccontextstore_p.h"
#include "qpatternistlocale_p.h"
#include "qtemplate_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
const SourceLocationReflection* Template::actualReflection() const
{
return this;
}
DynamicContext::TemplateParameterHash Template::parametersAsHash() const
{
DynamicContext::TemplateParameterHash retval;
const int len = templateParameters.count();
for(int i = 0; i < len; ++i)
{
const VariableDeclaration::Ptr &at = templateParameters.at(i);
retval.insert(at->name, at->expression());
}
return retval;
}
void Template::raiseXTSE0680(const ReportContext::Ptr &context,
const QXmlName &name,
const SourceLocationReflection *const reflection)
{
context->error(QtXmlPatterns::tr("The parameter %1 is passed, but no corresponding %2 exists.")
.arg(formatKeyword(context->namePool(), name),
formatKeyword(QLatin1String("xsl:param"))),
ReportContext::XTSE0680,
reflection);
}
DynamicContext::Ptr Template::createContext(const TemplateInvoker *const invoker,
const DynamicContext::Ptr &context,
const bool isCallTemplate) const
{
Q_ASSERT(invoker);
Q_ASSERT(context);
/* We have:
* - xsl:params in the target template (if any) which may provide
* default values.
* - xsl:with-params in the caller (if any) which provides values.
*
* We need to, for each parameter:
* - If the called template provides no default value and the caller
* has no value, it's an error
* - If the called template has a default value and the caller provides
* none, it should be used
* - In any case the caller provides a value, it needs to be used.
*
* Problems to look out for:
*
* - Each xsl:param is in scope for the subsequent xsl:params. Hence,
* the evaluation of one xsl:param can depend on another xsl:param,
* and so on
* - The focus for xsl:params is different from the focus for
* the xsl:with-params
* - The xsl:with-params are not in scope for the xsl:params.
*/
WithParam::Hash withParams(invoker->withParams());
/**
* Parameters or not, we must in any case create a new stack frame
* for the template invocation since otherwise we will trash our existing
* variables. Hence it's as with calling user functions.
*
* This is especially reproducible with recursive functions.
*/
DynamicContext::Ptr newStack(context->createStack());
/* We have no parameters, and we have no further error checking to
* do in the case of not being xsl:apply-templates, so we need to do nothing. */
if(templateParameters.isEmpty() && (!isCallTemplate || withParams.isEmpty()))
return newStack;
const DynamicContext::TemplateParameterHash hashedParams(parametersAsHash());
DynamicContext::TemplateParameterHash sewnTogether(hashedParams);
const DynamicContext::TemplateParameterHash::iterator end(sewnTogether.end());
for(DynamicContext::TemplateParameterHash::iterator it(sewnTogether.begin());
it != end;
++it)
{
Expression::Ptr ¶m = it.value();
WithParam::Ptr &withParam = withParams[it.key()];
if(withParam)
param = Expression::Ptr(new DynamicContextStore(withParam->sourceExpression(), context));
else if(!param)
{
/* Ops, no xsl:with-param and no default value to cover up for it.
*/
context->error(QtXmlPatterns::tr("The parameter %1 is required, but no corresponding %2 is supplied.")
.arg(formatKeyword(context->namePool(), it.key()),
formatKeyword(QLatin1String("xsl:with-param"))),
ReportContext::XTSE0690,
this);
}
}
if(isCallTemplate)
{
/* Find xsl:with-param that has no corresponding xsl:param. */
/* Optimization: candidate for threading? */
const WithParam::Hash::const_iterator end(withParams.constEnd());
for(WithParam::Hash::const_iterator it(withParams.constBegin()); it != end; ++it)
{
if(!hashedParams.contains(it.key()))
raiseXTSE0680(context, it.key(), this);
}
}
newStack->templateParameterStore() = sewnTogether;
return newStack;
}
void Template::compileParameters(const StaticContext::Ptr &context)
{
Q_ASSERT(context);
const int len = templateParameters.count();
for(int i = 0; i < len; ++i)
{
const VariableDeclaration::Ptr &at = templateParameters.at(i);
/* If our value is required, we don't have a default value. */
if(at->expression())
{
// TODO why do we pass in its own type here?
at->setExpression(at->expression()->typeCheck(context, at->expression()->staticType()));
at->setExpression(at->expression()->compress(context));
}
}
}
Expression::Properties Template::properties() const
{
return Expression::DisableElimination; /* We're having issues with recursion detection, so this path currently loops infintely. */
Expression::Properties collect(body->properties());
VariableDeclaration::List::const_iterator end(templateParameters.constEnd());
for(VariableDeclaration::List::const_iterator it(templateParameters.constBegin());
it != end;
++it)
{
if((*it)->expression())
collect |= (*it)->expression()->properties();
}
// TODO simplify.
return collect & (Expression::RequiresFocus | Expression::IsEvaluated | Expression::DisableElimination);
}
Expression::Properties Template::dependencies() const
{
return Expression::DisableElimination; /* We're having issues with recursion detection, so this path currently loops infintely. */
Expression::Properties collect(body->dependencies());
VariableDeclaration::List::const_iterator end(templateParameters.constEnd());
for(VariableDeclaration::List::const_iterator it(templateParameters.constBegin());
it != end;
++it)
{
if((*it)->expression())
collect |= (*it)->expression()->dependencies();
}
return collect & (Expression::RequiresFocus | Expression::IsEvaluated | Expression::DisableElimination);
}
QT_END_NAMESPACE
|
