source: trunk/src/xmlpatterns/functions/qstringvaluefns.cpp@ 117

Last change on this file since 117 was 2, checked in by Dmitry A. Kuminov, 16 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 11.8 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information ([email protected])
5**
6** This file is part of the QtXmlPatterns module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial Usage
10** Licensees holding valid Qt Commercial licenses may use this file in
11** accordance with the Qt Commercial License Agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Nokia.
14**
15** GNU Lesser General Public License Usage
16** Alternatively, this file may be used under the terms of the GNU Lesser
17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
21** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
22**
23** In addition, as a special exception, Nokia gives you certain
24** additional rights. These rights are described in the Nokia Qt LGPL
25** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26** package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you are unsure which license is appropriate for your use, please
37** contact the sales department at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include "qabstractfloat_p.h"
43#include "qatomicstring_p.h"
44#include "qcommonsequencetypes_p.h"
45#include "qcommonvalues_p.h"
46#include "qinteger_p.h"
47#include "qliteral_p.h"
48#include "qpatternistlocale_p.h"
49#include "qschemanumeric_p.h"
50
51#include "qstringvaluefns_p.h"
52
53QT_BEGIN_NAMESPACE
54
55using namespace QPatternist;
56
57Item ConcatFN::evaluateSingleton(const DynamicContext::Ptr &context) const
58{
59 const Expression::List::const_iterator end(m_operands.constEnd());
60 Expression::List::const_iterator it(m_operands.constBegin());
61 QString result;
62
63 for(; it != end; ++it)
64 {
65 Item item((*it)->evaluateSingleton(context));
66
67 if(item)
68 result += item.stringValue();
69 }
70
71 return AtomicString::fromValue(result);
72}
73
74Item StringJoinFN::evaluateSingleton(const DynamicContext::Ptr &context) const
75{
76 Item::Iterator::Ptr it(m_operands.first()->evaluateSequence(context));
77 Q_ASSERT(it);
78 Item current(it->next());
79
80 if(!current) /* Exit early, don't evaluate the separator. */
81 return CommonValues::EmptyString;
82
83 QString result;
84 QString separator;
85 const Item isep(m_operands.at(1)->evaluateSingleton(context));
86
87 if(isep)
88 separator = isep.stringValue();
89
90 while(true)
91 {
92 result += current.stringValue();
93 current = it->next();
94
95 if(!current)
96 break;
97
98 result += separator;
99 }
100
101 return result.isEmpty()
102 ? toItem(CommonValues::EmptyString)
103 : toItem(AtomicString::fromValue(result));
104}
105
106Expression::Ptr StringJoinFN::compress(const StaticContext::Ptr &context)
107{
108 if(m_operands.first()->staticType()->cardinality().allowsMany())
109 return FunctionCall::compress(context);
110 else
111 {
112 if(m_operands.first()->is(IDEmptySequence))
113 return wrapLiteral(CommonValues::EmptyString, context, this);
114 else
115 return m_operands.first()->compress(context);
116 }
117}
118
119Item SubstringFN::evaluateSingleton(const DynamicContext::Ptr &context) const
120{
121 Item item(m_operands.first()->evaluateSingleton(context));
122
123 if(!item)
124 return CommonValues::EmptyString;
125
126 const QString str(item.stringValue());
127
128 const xsDouble dblStart = m_operands.at(1)->evaluateSingleton(context).as<Numeric>()
129 ->round()->toDouble();
130 if(qIsNaN(dblStart))
131 return CommonValues::EmptyString;
132
133 /* XPath starts from 1, but C++ starts from 0. */
134 xsInteger startingLoc = Double::fromValue(dblStart)->round()->toInteger() - 1;
135
136 xsInteger length = 0;
137 if(m_operands.count() == 2)
138 length = str.length() - startingLoc;
139 else
140 {
141 const xsDouble dblLen = m_operands.at(2)->evaluateSingleton(context).as<Numeric>()
142 ->round()->toDouble();
143
144 if(qIsNaN(dblLen))
145 return CommonValues::EmptyString;
146
147 length = Double::fromValue(dblLen)->round()->toInteger();
148 if(startingLoc > startingLoc + length)
149 return CommonValues::EmptyString;
150 }
151
152 if(startingLoc < 0)
153 {
154 length = length + startingLoc;
155 startingLoc = 0;
156 }
157
158 return AtomicString::fromValue(str.mid(startingLoc, length));
159}
160
161Item StringLengthFN::evaluateSingleton(const DynamicContext::Ptr &context) const
162{
163 const Item item(m_operands.first()->evaluateSingleton(context));
164
165 /* fn:string() is re-implemented "inline" here. */
166 if(item)
167 return Integer::fromValue(item.stringValue().length());
168 else
169 return CommonValues::IntegerZero;
170}
171
172NormalizeUnicodeFN::NormalizeUnicodeFN() : m_normForm(QString::NormalizationForm_C)
173{
174}
175
176Item NormalizeSpaceFN::evaluateSingleton(const DynamicContext::Ptr &context) const
177{
178 const Item arg(m_operands.first()->evaluateSingleton(context));
179
180 if(!arg)
181 return CommonValues::EmptyString;
182
183 return toItem(AtomicString::fromValue(arg.stringValue().simplified()));
184}
185
186Item NormalizeUnicodeFN::evaluateSingleton(const DynamicContext::Ptr &context) const
187{
188 const Item arg(m_operands.first()->evaluateSingleton(context));
189
190 if(!arg)
191 return CommonValues::EmptyString;
192
193 int normForm;
194
195 /* The second argument has been removed, if we've already determined the form. */
196 if(m_operands.count() == 1)
197 normForm = m_normForm;
198 else
199 {
200 normForm = determineNormalizationForm(context);
201 if(normForm == -1)
202 return toItem(AtomicString::fromValue(arg.stringValue()));
203 }
204
205 return AtomicString::fromValue(arg.stringValue().normalized(
206 static_cast<QString::NormalizationForm>(normForm)));
207}
208
209Expression::Ptr NormalizeUnicodeFN::compress(const StaticContext::Ptr &context)
210{
211 const Expression::Ptr me(FunctionCall::compress(context));
212 if(me != this)
213 return me;
214
215 Q_ASSERT(m_operands.count() == 1 || m_operands.count() == 2);
216
217 if(m_operands.count() == 1)
218 m_normForm = QString::NormalizationForm_C;
219 else if(m_operands.last()->is(IDStringValue))
220 {
221 m_normForm = static_cast<QString::NormalizationForm>(
222 determineNormalizationForm(context->dynamicContext()));
223
224 if(m_normForm == -1)
225 return m_operands.first();
226
227 /* Remove the operand since we don't need it anymore. */
228 m_operands.removeLast();
229 }
230
231 return me;
232}
233
234int NormalizeUnicodeFN::determineNormalizationForm(const DynamicContext::Ptr &context) const
235{
236 const QString strRepr(m_operands.last()->evaluateSingleton(context).stringValue().trimmed().toUpper());
237
238 /* TODO. Put these values in a QHash for faster lookup. Keep thread safety in mind. */
239 if(strRepr.isEmpty())
240 return -1;
241 else if(strRepr == QLatin1String("NFC"))
242 return QString::NormalizationForm_C;
243 else if(strRepr == QLatin1String("NFD"))
244 return QString::NormalizationForm_D;
245 else if(strRepr == QLatin1String("NFKC"))
246 return QString::NormalizationForm_KC;
247 else if(strRepr == QLatin1String("NFKD"))
248 return QString::NormalizationForm_KD;
249 else
250 {
251 /* What form is FULLY_NORMALIZED? Is a code path available for that somewhere? */
252 context->error(QtXmlPatterns::tr("The normalization form %1 is "
253 "unsupported. The supported forms are "
254 "%2, %3, %4, and %5, and none, i.e. "
255 "the empty string (no normalization).")
256 .arg(formatKeyword(strRepr))
257 .arg(formatKeyword("NFC"))
258 .arg(formatKeyword("NFD"))
259 .arg(formatKeyword("NFKC"))
260 .arg(formatKeyword("NFKD")),
261 ReportContext::FOCH0003,
262 this);
263 return QString::NormalizationForm_C; /* Silence compiler warning. */
264 }
265}
266
267Item UpperCaseFN::evaluateSingleton(const DynamicContext::Ptr &context) const
268{
269 const Item item(m_operands.first()->evaluateSingleton(context));
270
271 if(!item)
272 return CommonValues::EmptyString;
273
274 return AtomicString::fromValue(item.stringValue().toUpper());
275}
276
277Item LowerCaseFN::evaluateSingleton(const DynamicContext::Ptr &context) const
278{
279 const Item item(m_operands.first()->evaluateSingleton(context));
280
281 if(!item)
282 return CommonValues::EmptyString;
283
284 return AtomicString::fromValue(item.stringValue().toLower());
285}
286
287Item TranslateFN::evaluateSingleton(const DynamicContext::Ptr &context) const
288{
289 const Item item(m_operands.first()->evaluateSingleton(context));
290
291 if(!item)
292 return CommonValues::EmptyString;
293
294 const QString mapString(m_operands.at(1)->evaluateSingleton(context).stringValue());
295 const QString arg(item.stringValue());
296
297 if(mapString.isEmpty())
298 return AtomicString::fromValue(arg);
299
300 const QString transString(m_operands.at(2)->evaluateSingleton(context).stringValue());
301 const int transLen = transString.length();
302 const int argLen = arg.length();
303
304 QString result;
305 result.reserve(argLen);
306 int outI = 0;
307
308 for(int i = 0; i < argLen; ++i)
309 {
310 const QChar argCh(arg.at(i));
311 const int mapPos = mapString.indexOf(argCh);
312
313 if(mapPos == -1)
314 {
315 result[outI] = argCh;
316 ++outI;
317 continue;
318 }
319 else if(mapPos >= transLen)
320 continue;
321
322 const QChar transCh(transString.at(mapPos));
323
324 if(transCh.isNull())
325 continue;
326
327 result[outI] = transCh;
328 ++outI;
329 }
330
331 result.truncate(outI);
332 return AtomicString::fromValue(result);
333}
334
335EncodeString::EncodeString(const QByteArray &excludeChars,
336 const QByteArray &includeChars) : m_excludeChars(excludeChars),
337 m_includeChars(includeChars)
338{
339}
340
341Item EncodeString::evaluateSingleton(const DynamicContext::Ptr &context) const
342{
343 const Item item(m_operands.first()->evaluateSingleton(context));
344
345 if(!item)
346 return CommonValues::EmptyString;
347
348 return AtomicString::fromValue(QString::fromAscii(QUrl::toPercentEncoding(item.stringValue(),
349 m_excludeChars,
350 m_includeChars).constData()));
351}
352
353const char *const EncodeForURIFN::include = "#!*'()";
354
355EncodeForURIFN::EncodeForURIFN() : EncodeString(QByteArray(), QByteArray::fromRawData(include, 6))
356{
357}
358
359const char *const IriToURIFN::exclude = "#-_!~*'();?@&=+$,[]/:%";
360
361IriToURIFN::IriToURIFN() : EncodeString(QByteArray::fromRawData(exclude, 22), QByteArray())
362{
363}
364
365const char *const EscapeHtmlURIFN::include = "?&[]%";
366const char *const EscapeHtmlURIFN::exclude = " :;=@!./+*()-,#$'";
367
368EscapeHtmlURIFN::EscapeHtmlURIFN() : EncodeString(QByteArray::fromRawData(exclude, 17),
369 QByteArray::fromRawData(include, 6))
370{
371}
372
373QT_END_NAMESPACE
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