source: trunk/src/script/qscriptecmaregexp.cpp@ 82

Last change on this file since 82 was 2, checked in by Dmitry A. Kuminov, 16 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 10.8 KB
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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 QtScript 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 "qscriptecmaregexp_p.h"
43
44#ifndef QT_NO_SCRIPT
45
46#include "qscriptengine_p.h"
47#include "qscriptvalueimpl_p.h"
48#include "qscriptcontext_p.h"
49#include "qscriptmember_p.h"
50#include "qscriptobject_p.h"
51
52#include <QtCore/QStringList>
53#include <QtCore/QRegExp>
54#include <QtCore/QtDebug>
55
56QT_BEGIN_NAMESPACE
57
58namespace QScript { namespace Ecma {
59
60RegExp::RegExp(QScriptEnginePrivate *eng):
61 Core(eng, QLatin1String("RegExp"), QScriptClassInfo::RegExpType)
62{
63 newRegExp(&publicPrototype, QString(), /*flags=*/0);
64
65 eng->newConstructor(&ctor, this, publicPrototype);
66
67 addPrototypeFunction(QLatin1String("exec"), method_exec, 1);
68 addPrototypeFunction(QLatin1String("test"), method_test, 1);
69 addPrototypeFunction(QLatin1String("toString"), method_toString, 1);
70}
71
72RegExp::~RegExp()
73{
74}
75
76RegExp::Instance *RegExp::Instance::get(const QScriptValueImpl &object, QScriptClassInfo *klass)
77{
78 if (! klass || klass == object.classInfo())
79 return static_cast<Instance*> (object.objectData());
80
81 return 0;
82}
83
84void RegExp::execute(QScriptContextPrivate *context)
85{
86#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
87 engine()->notifyFunctionEntry(context);
88#endif
89 QString P;
90 int F;
91 QScriptValueImpl pattern = context->argument(0);
92 QScriptValueImpl flags = context->argument(1);
93 if (!context->isCalledAsConstructor()) {
94 if ((pattern.classInfo() == classInfo()) && flags.isUndefined()) {
95 context->m_result = pattern;
96 goto Lout;
97 }
98 }
99 if (pattern.classInfo() == classInfo()) {
100 if (!flags.isUndefined()) {
101 context->throwTypeError(QString::fromLatin1("cannot specify flags when creating a copy of a RegExp"));
102 goto Lout;
103 }
104 Instance *data = Instance::get(pattern, classInfo());
105#ifndef QT_NO_REGEXP
106 P = data->value.pattern();
107#else
108 P = data->pattern;
109#endif
110 F = data->flags;
111 } else {
112 if (!pattern.isUndefined())
113 P = pattern.toString();
114 F = 0;
115 if (!flags.isUndefined()) {
116 QString flagsStr = flags.toString();
117 for (int i = 0; i < flagsStr.length(); ++i) {
118 int bitflag = flagFromChar(flagsStr.at(i));
119 if (bitflag == 0) {
120 context->throwError(
121 QScriptContext::SyntaxError,
122 QString::fromUtf8("invalid regular expression flag '%0'")
123 .arg(flagsStr.at(i)));
124 goto Lout;
125 }
126 F |= bitflag;
127 }
128 }
129 }
130 if (context->isCalledAsConstructor()) {
131 QScriptValueImpl &object = context->m_thisObject;
132 object.setClassInfo(classInfo());
133 object.setPrototype(publicPrototype);
134#ifndef QT_NO_REGEXP
135 initRegExp(&object, toRegExp(P, F), F);
136#else
137 initRegExp(&object, P, F);
138#endif
139 } else {
140 newRegExp(&context->m_result, P, F);
141 }
142 Lout: ;
143#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
144 engine()->notifyFunctionExit(context);
145#endif
146}
147
148void RegExp::newRegExp(QScriptValueImpl *result, const QString &pattern, int flags)
149{
150#ifndef QT_NO_REGEXP
151 QRegExp rx = toRegExp(pattern, flags);
152 newRegExp_helper(result, rx, flags);
153#else
154 engine()->newObject(result, publicPrototype, classInfo());
155 initRegExp(result, pattern, flags);
156#endif // QT_NO_REGEXP
157}
158
159#ifndef QT_NO_REGEXP
160void RegExp::newRegExp(QScriptValueImpl *result, const QRegExp &rx, int flags)
161{
162 Q_ASSERT(!(flags & IgnoreCase) || (rx.caseSensitivity() == Qt::CaseInsensitive));
163 newRegExp_helper(result, rx, flags);
164}
165
166void RegExp::newRegExp_helper(QScriptValueImpl *result, const QRegExp &rx,
167 int flags)
168{
169 engine()->newObject(result, publicPrototype, classInfo());
170 initRegExp(result, rx, flags);
171}
172
173QRegExp RegExp::toRegExp(const QScriptValueImpl &value) const
174{
175 Instance *rx_data = Instance::get(value, classInfo());
176 Q_ASSERT(rx_data != 0);
177 return rx_data->value;
178}
179
180QRegExp RegExp::toRegExp(const QString &pattern, int flags)
181{
182 bool ignoreCase = (flags & IgnoreCase) != 0;
183 return QRegExp(pattern,
184 (ignoreCase ? Qt::CaseInsensitive: Qt::CaseSensitive),
185 QRegExp::RegExp2);
186}
187
188#endif // QT_NO_REGEXP
189
190void RegExp::initRegExp(QScriptValueImpl *result,
191#ifndef QT_NO_REGEXP
192 const QRegExp &rx,
193#else
194 const QString &pattern,
195#endif
196 int flags)
197{
198 Instance *instance = new Instance();
199#ifndef QT_NO_REGEXP
200 instance->value = rx;
201#else
202 instance->pattern = pattern;
203#endif
204 instance->flags = flags;
205 result->setObjectData(instance);
206
207 bool global = (flags & Global) != 0;
208 bool ignoreCase = (flags & IgnoreCase) != 0;
209 bool multiline = (flags & Multiline) != 0;
210
211 QScriptValue::PropertyFlags propertyFlags = QScriptValue::SkipInEnumeration
212 | QScriptValue::Undeletable
213 | QScriptValue::ReadOnly;
214
215 result->setProperty(QLatin1String("global"), QScriptValueImpl(global),
216 propertyFlags);
217 result->setProperty(QLatin1String("ignoreCase"), QScriptValueImpl(ignoreCase),
218 propertyFlags);
219 result->setProperty(QLatin1String("multiline"), QScriptValueImpl(multiline),
220 propertyFlags);
221#ifndef QT_NO_REGEXP
222 const QString &pattern = rx.pattern();
223#endif
224 result->setProperty(QLatin1String("source"), QScriptValueImpl(engine(), pattern),
225 propertyFlags);
226 result->setProperty(QLatin1String("lastIndex"), QScriptValueImpl(0),
227 propertyFlags & ~QScriptValue::ReadOnly);
228}
229
230int RegExp::flagFromChar(const QChar &ch)
231{
232 static QHash<QChar, int> flagsHash;
233 if (flagsHash.isEmpty()) {
234 flagsHash[QLatin1Char('g')] = Global;
235 flagsHash[QLatin1Char('i')] = IgnoreCase;
236 flagsHash[QLatin1Char('m')] = Multiline;
237 }
238 QHash<QChar, int>::const_iterator it;
239 it = flagsHash.constFind(ch);
240 if (it == flagsHash.constEnd())
241 return 0;
242 return it.value();
243}
244
245QString RegExp::flagsToString(int flags)
246{
247 QString result;
248 if (flags & Global)
249 result += QLatin1Char('g');
250 if (flags & IgnoreCase)
251 result += QLatin1Char('i');
252 if (flags & Multiline)
253 result += QLatin1Char('m');
254 return result;
255}
256
257QScriptValueImpl RegExp::method_exec(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *classInfo)
258{
259 QScriptValueImpl self = context->thisObject();
260 if (self.classInfo() != classInfo) {
261 return throwThisObjectTypeError(
262 context, QLatin1String("RegExp.prototype.exec"));
263 }
264 Instance *rx_data = Instance::get(self, classInfo);
265 Q_ASSERT(rx_data != 0);
266
267 QString S = context->argument(0).toString();
268 int length = S.length();
269 QScriptValueImpl lastIndex = self.property(QLatin1String("lastIndex"));
270
271 int i = lastIndex.isValid() ? int (lastIndex.toInteger()) : 0;
272 bool global = self.property(QLatin1String("global")).toBoolean();
273
274 if (! global)
275 i = 0;
276
277 if (i < 0 || i >= length)
278 return (eng->nullValue());
279
280#ifndef QT_NO_REGEXP
281 int index = rx_data->value.indexIn(S, i);
282 if (index == -1)
283#endif // QT_NO_REGEXP
284 return eng->nullValue();
285
286#ifndef QT_NO_REGEXP
287 int e = index + rx_data->value.matchedLength();
288
289 if (global)
290 self.setProperty(QLatin1String("lastIndex"), QScriptValueImpl(e));
291
292 QScript::Array elts(eng);
293 QStringList capturedTexts = rx_data->value.capturedTexts();
294 for (int i = 0; i < capturedTexts.count(); ++i)
295 elts.assign(i, QScriptValueImpl(eng, capturedTexts.at(i)));
296
297 QScriptValueImpl r = eng->newArray(elts);
298
299 r.setProperty(QLatin1String("index"), QScriptValueImpl(index));
300 r.setProperty(QLatin1String("input"), QScriptValueImpl(eng, S));
301
302 return r;
303#endif // QT_NO_REGEXP
304}
305
306QScriptValueImpl RegExp::method_test(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *classInfo)
307{
308 QScriptValueImpl r = method_exec(context, eng, classInfo);
309 return QScriptValueImpl(!r.isNull());
310}
311
312QScriptValueImpl RegExp::method_toString(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *classInfo)
313{
314 if (Instance *instance = Instance::get(context->thisObject(), classInfo)) {
315 QString result;
316 result += QLatin1Char('/');
317#ifndef QT_NO_REGEXP
318 const QString &pattern = instance->value.pattern();
319#else
320 const QString &pattern = instance->pattern;
321#endif
322 if (pattern.isEmpty())
323 result += QLatin1String("(?:)");
324 else
325 result += pattern; // ### quote
326 result += QLatin1Char('/');
327 result += flagsToString(instance->flags);
328 return (QScriptValueImpl(eng, result));
329 }
330
331 return throwThisObjectTypeError(
332 context, QLatin1String("RegExp.prototype.toString"));
333}
334
335} } // namespace QScript::Ecma
336
337QT_END_NAMESPACE
338
339#endif // QT_NO_SCRIPT
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