source: trunk/src/script/qscriptecmastring.cpp@ 350

Last change on this file since 350 was 2, checked in by Dmitry A. Kuminov, 16 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 26.9 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 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 "qscriptecmastring_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#include "qscriptclassdata_p.h"
52
53#include <QtCore/QStringList>
54#include <QtCore/QtDebug>
55#include <QtCore/qnumeric.h>
56
57#include <limits.h>
58
59QT_BEGIN_NAMESPACE
60
61namespace QScript { namespace Ecma {
62
63class StringClassData: public QScriptClassData
64{
65 QScriptClassInfo *m_classInfo;
66
67public:
68 StringClassData(QScriptClassInfo *classInfo);
69 virtual ~StringClassData();
70
71 inline QScriptClassInfo *classInfo() const
72 { return m_classInfo; }
73
74 virtual bool resolve(const QScriptValueImpl &object,
75 QScriptNameIdImpl *nameId,
76 QScript::Member *member, QScriptValueImpl *base,
77 QScript::AccessMode access);
78 virtual bool get(const QScriptValueImpl &object, const Member &member,
79 QScriptValueImpl *out_value);
80 virtual bool put(QScriptValueImpl *object, const Member &member,
81 const QScriptValueImpl &value);
82 virtual QScriptClassDataIterator *newIterator(const QScriptValueImpl &object);
83};
84
85class StringClassDataIterator: public QScriptClassDataIterator
86{
87public:
88 StringClassDataIterator(int length);
89 virtual ~StringClassDataIterator();
90
91 virtual bool hasNext() const;
92 virtual void next(QScript::Member *member);
93
94 virtual bool hasPrevious() const;
95 virtual void previous(QScript::Member *member);
96
97 virtual void toFront();
98 virtual void toBack();
99
100private:
101 int m_length;
102 int m_pos;
103};
104
105StringClassData::StringClassData(QScriptClassInfo *classInfo):
106 m_classInfo(classInfo)
107{
108}
109
110StringClassData::~StringClassData()
111{
112}
113
114bool StringClassData::resolve(const QScriptValueImpl &object,
115 QScriptNameIdImpl *nameId,
116 QScript::Member *member,
117 QScriptValueImpl *base,
118 QScript::AccessMode /*access*/)
119{
120 if (object.classInfo() != classInfo())
121 return false;
122
123 QScriptEnginePrivate *eng = object.engine();
124
125 if (nameId == eng->idTable()->id_length) {
126 member->native(nameId, /*id=*/ 0,
127 QScriptValue::Undeletable
128 | QScriptValue::ReadOnly
129 | QScriptValue::SkipInEnumeration);
130 *base = object;
131 return true;
132 }
133
134 bool ok = false;
135 int index = nameId->s.toInt(&ok);
136 if (!ok || (index < 0))
137 return false;
138
139 QScriptNameIdImpl *ref = object.internalValue().stringValue();
140 if (index >= ref->s.length())
141 return false;
142
143 member->native(nameId, index, QScriptValue::Undeletable | QScriptValue::ReadOnly);
144 return true;
145}
146
147bool StringClassData::get(const QScriptValueImpl &object,
148 const QScript::Member &member,
149 QScriptValueImpl *result)
150{
151 Q_ASSERT(member.isValid());
152
153 if (object.classInfo() != classInfo())
154 return false;
155
156 QScriptEnginePrivate *eng = object.engine();
157 if (! member.isNativeProperty())
158 return false;
159
160 QScriptNameIdImpl *ref = object.internalValue().stringValue();
161 int len = ref->s.length();
162
163 if (member.nameId() == eng->idTable()->id_length)
164 *result = QScriptValueImpl(len);
165
166 else if (member.id() >= 0 && member.id() < len)
167 eng->newString(result, ref->s.at(member.id()));
168
169 else
170 *result = eng->undefinedValue();
171
172 return true;
173}
174
175bool StringClassData::put(QScriptValueImpl *, const Member &,
176 const QScriptValueImpl &)
177{
178 // writes to string elements are ignored
179 return true;
180}
181
182QScriptClassDataIterator *StringClassData::newIterator(const QScriptValueImpl &object)
183{
184 QScriptNameIdImpl *id = object.internalValue().stringValue();
185 return new StringClassDataIterator(id->s.length());
186}
187
188StringClassDataIterator::StringClassDataIterator(int length)
189{
190 m_length = length;
191 m_pos = 0;
192}
193
194StringClassDataIterator::~StringClassDataIterator()
195{
196}
197
198bool StringClassDataIterator::hasNext() const
199{
200 return m_pos < m_length;
201}
202
203void StringClassDataIterator::next(QScript::Member *member)
204{
205 member->native(/*nameId=*/ 0, m_pos, QScriptValue::Undeletable | QScriptValue::ReadOnly);
206 ++m_pos;
207}
208
209bool StringClassDataIterator::hasPrevious() const
210{
211 return (m_pos - 1) >= 0;
212}
213
214void StringClassDataIterator::previous(QScript::Member *member)
215{
216 --m_pos;
217 member->native(/*nameId=*/ 0, m_pos, QScriptValue::Undeletable | QScriptValue::ReadOnly);
218}
219
220void StringClassDataIterator::toFront()
221{
222 m_pos = 0;
223}
224
225void StringClassDataIterator::toBack()
226{
227 m_pos = m_length;
228}
229
230
231
232String::String(QScriptEnginePrivate *eng):
233 Core(eng, QLatin1String("String"), QScriptClassInfo::StringType)
234{
235 classInfo()->setData(new StringClassData(classInfo()));
236
237 newString(&publicPrototype, QString());
238
239 eng->newConstructor(&ctor, this, publicPrototype);
240
241 addPrototypeFunction(QLatin1String("toString"), method_toString, 0);
242 addPrototypeFunction(QLatin1String("valueOf"), method_valueOf, 0);
243 addPrototypeFunction(QLatin1String("charAt"), method_charAt, 1);
244 addPrototypeFunction(QLatin1String("charCodeAt"), method_charCodeAt, 1);
245 addPrototypeFunction(QLatin1String("concat"), method_concat, 1);
246 addPrototypeFunction(QLatin1String("indexOf"), method_indexOf, 1);
247 addPrototypeFunction(QLatin1String("lastIndexOf"), method_lastIndexOf, 1);
248 addPrototypeFunction(QLatin1String("localeCompare"), method_localeCompare, 1);
249 addPrototypeFunction(QLatin1String("match"), method_match, 1);
250 addPrototypeFunction(QLatin1String("replace"), method_replace, 2);
251 addPrototypeFunction(QLatin1String("search"), method_search, 1);
252 addPrototypeFunction(QLatin1String("slice"), method_slice, 2);
253 addPrototypeFunction(QLatin1String("split"), method_split, 2);
254 addPrototypeFunction(QLatin1String("substr"), method_substr, 2);
255 addPrototypeFunction(QLatin1String("substring"), method_substring, 2);
256 addPrototypeFunction(QLatin1String("toLowerCase"), method_toLowerCase, 0);
257 addPrototypeFunction(QLatin1String("toLocaleLowerCase"), method_toLocaleLowerCase, 0);
258 addPrototypeFunction(QLatin1String("toUpperCase"), method_toUpperCase, 0);
259 addPrototypeFunction(QLatin1String("toLocaleUpperCase"), method_toLocaleUpperCase, 0);
260
261 addConstructorFunction(QLatin1String("fromCharCode"), method_fromCharCode, 1);
262}
263
264String::~String()
265{
266}
267
268void String::execute(QScriptContextPrivate *context)
269{
270#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
271 engine()->notifyFunctionEntry(context);
272#endif
273 QString value;
274
275 if (context->argumentCount() > 0)
276 value = context->argument(0).toString();
277
278 QScriptValueImpl str(engine(), value);
279 if (!context->isCalledAsConstructor()) {
280 context->setReturnValue(str);
281 } else {
282 QScriptValueImpl &obj = context->m_thisObject;
283 obj.setClassInfo(classInfo());
284 obj.setInternalValue(str);
285 obj.setPrototype(publicPrototype);
286 context->setReturnValue(obj);
287 }
288#ifndef Q_SCRIPT_NO_EVENT_NOTIFY
289 engine()->notifyFunctionExit(context);
290#endif
291}
292
293void String::newString(QScriptValueImpl *result, const QString &value)
294{
295 engine()->newObject(result, publicPrototype, classInfo());
296 result->setInternalValue(QScriptValueImpl(engine(), value));
297}
298
299QScriptValueImpl String::method_toString(QScriptContextPrivate *context, QScriptEnginePrivate *, QScriptClassInfo *classInfo)
300{
301 QScriptValueImpl self = context->thisObject();
302 if (self.classInfo() != classInfo) {
303 return context->throwError(QScriptContext::TypeError, QLatin1String("String.prototype.toString"));
304 }
305 return (self.internalValue());
306}
307
308QScriptValueImpl String::method_valueOf(QScriptContextPrivate *context, QScriptEnginePrivate *, QScriptClassInfo *classInfo)
309{
310 QScriptValueImpl self = context->thisObject();
311 if (self.classInfo() != classInfo) {
312 return throwThisObjectTypeError(
313 context, QLatin1String("String.prototype.valueOf"));
314 }
315 return (self.internalValue());
316}
317
318QScriptValueImpl String::method_charAt(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
319{
320 QString str = context->thisObject().toString();
321
322 int pos = 0;
323 if (context->argumentCount() > 0)
324 pos = int (context->argument(0).toInteger());
325
326 QString result;
327 if (pos >= 0 && pos < str.length())
328 result += str.at(pos);
329
330 return (QScriptValueImpl(eng, result));
331}
332
333QScriptValueImpl String::method_charCodeAt(QScriptContextPrivate *context, QScriptEnginePrivate *, QScriptClassInfo *)
334{
335 QString str = context->thisObject().toString();
336
337 int pos = 0;
338 if (context->argumentCount() > 0)
339 pos = int (context->argument(0).toInteger());
340
341 qsreal result = qSNaN();
342
343 if (pos >= 0 && pos < str.length())
344 result = str.at(pos).unicode();
345
346 return (QScriptValueImpl(result));
347}
348
349QScriptValueImpl String::method_concat(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
350{
351 QString value = context->thisObject().toString();
352
353 for (int i = 0; i < context->argumentCount(); ++i)
354 value += context->argument(i).toString();
355
356 return (QScriptValueImpl(eng, value));
357}
358
359QScriptValueImpl String::method_indexOf(QScriptContextPrivate *context, QScriptEnginePrivate *, QScriptClassInfo *)
360{
361 QString value = context->thisObject().toString();
362
363 QString searchString = context->argument(0).toString();
364
365 int pos = 0;
366 if (context->argumentCount() > 1)
367 pos = int (context->argument(1).toInteger());
368
369 int index = -1;
370 if (! value.isEmpty())
371 index = value.indexOf(searchString, qMin(qMax(pos, 0), value.length()));
372
373 return (QScriptValueImpl(index));
374}
375
376QScriptValueImpl String::method_lastIndexOf(QScriptContextPrivate *context, QScriptEnginePrivate *, QScriptClassInfo *)
377{
378 QString value = context->thisObject().toString();
379
380 QString searchString = context->argument(0).toString();
381
382 qsreal position = context->argument(1).toNumber();
383 if (qIsNaN(position))
384 position = +qInf();
385 else
386 position = QScriptEnginePrivate::toInteger(position);
387
388 int pos = QScriptEnginePrivate::toInt32(qMin(qMax(position, 0.0), qsreal(value.length())));
389 if (!searchString.isEmpty() && pos == value.length())
390 --pos;
391 int index = value.lastIndexOf(searchString, pos);
392 return (QScriptValueImpl(index));
393}
394
395QScriptValueImpl String::method_localeCompare(QScriptContextPrivate *context, QScriptEnginePrivate *, QScriptClassInfo *)
396{
397 QString value = context->thisObject().toString();
398 QString that = context->argument(0).toString();
399 return QScriptValueImpl(QString::localeAwareCompare(value, that));
400}
401
402QScriptValueImpl String::method_match(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
403{
404 QScriptValueImpl pattern = context->argument(0);
405
406 if (! eng->regexpConstructor->get(pattern))
407 eng->regexpConstructor->newRegExp(&pattern, context->argument(0).toString(), /*flags=*/0);
408
409 QScriptValueImpl rx_exec = pattern.property(QLatin1String("exec"), QScriptValue::ResolvePrototype);
410 if (! (rx_exec.isValid() && rx_exec.isFunction())) {
411 return context->throwError(QScriptContext::TypeError,
412 QLatin1String("String.prototype.match"));
413 }
414
415 QScriptValueImplList args;
416 args << context->thisObject();
417
418 QScriptValueImpl global = pattern.property(QLatin1String("global"));
419 if (! (global.isValid() && global.toBoolean()))
420 return (rx_exec.call(pattern, args));
421
422 QScript::Array result(eng);
423
424 QScriptNameIdImpl *lastIndexId = eng->nameId(QLatin1String("lastIndex"));
425 QScriptNameIdImpl *zeroId = eng->nameId(QLatin1String("0"));
426
427 pattern.setProperty(lastIndexId, QScriptValueImpl(0));
428 int n = 0;
429 while (true) {
430 qsreal lastIndex = pattern.property(lastIndexId).toNumber();
431 QScriptValueImpl r = rx_exec.call(pattern, args);
432 if (r.isNull())
433 break;
434 qsreal newLastIndex = pattern.property(lastIndexId).toNumber();
435 if (newLastIndex == lastIndex)
436 pattern.setProperty(lastIndexId, QScriptValueImpl(lastIndex + 1));
437 result.assign(n++, r.property(zeroId));
438 }
439
440 return (eng->newArray(result));
441}
442
443QScriptValueImpl String::method_replace(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
444{
445 QString input = context->thisObject().toString();
446 QScriptValueImpl searchValue = context->argument(0);
447 QScriptValueImpl replaceValue = context->argument(1);
448
449 QString output;
450 if (searchValue.classInfo() == eng->regexpConstructor->classInfo()) {
451 // searchValue is a RegExp
452 QScriptValueImpl rx_exec = searchValue.property(QLatin1String("exec"), QScriptValue::ResolvePrototype);
453 if (!rx_exec.isFunction()) {
454 return context->throwError(QScriptContext::TypeError,
455 QLatin1String("String.prototype.replace"));
456 }
457 QVector<QScriptValueImpl> occurrences;
458 QScriptValueImpl global = searchValue.property(QLatin1String("global"));
459 QScriptValueImplList args;
460 args << QScriptValueImpl(eng, input);
461 if (!global.toBoolean()) {
462 QScriptValueImpl r = rx_exec.call(searchValue, args);
463 if (!r.isNull())
464 occurrences.append(r);
465 } else {
466 QScriptNameIdImpl *lastIndexId = eng->nameId(QLatin1String("lastIndex"));
467 searchValue.setProperty(lastIndexId, QScriptValueImpl(0));
468 while (true) {
469 qsreal lastIndex = searchValue.property(lastIndexId).toNumber();
470 QScriptValueImpl r = rx_exec.call(searchValue, args);
471 if (r.isNull())
472 break;
473 qsreal newLastIndex = searchValue.property(lastIndexId).toNumber();
474 if (newLastIndex == lastIndex)
475 searchValue.setProperty(lastIndexId, QScriptValueImpl(lastIndex + 1));
476 occurrences.append(r);
477 }
478 }
479 int pos = 0;
480 if (replaceValue.isFunction()) {
481 QScriptNameIdImpl *indexId = eng->nameId(QLatin1String("index"));
482 QScriptNameIdImpl *lengthId = eng->nameId(QLatin1String("length"));
483 for (int i = 0; i < occurrences.count(); ++i) {
484 QScriptValueImpl needle = occurrences.at(i);
485 int index = int (needle.property(indexId).toInteger());
486 uint length = eng->toUint32(needle.property(lengthId).toNumber());
487 output += input.mid(pos, index - pos);
488 args.clear();
489 for (uint j = 0; j < length; ++j)
490 args << needle.property(j);
491 args << QScriptValueImpl(index);
492 args << QScriptValueImpl(eng, input);
493 QScriptValueImpl ret = replaceValue.call(eng->nullValue(), args);
494 output += ret.toString();
495 pos = index + args[0].toString().length();
496 }
497 } else {
498 // use string representation of replaceValue
499 const QString replaceString = replaceValue.toString();
500 const QLatin1Char dollar = QLatin1Char('$');
501 QScriptNameIdImpl *indexId = eng->nameId(QLatin1String("index"));
502 QScriptNameIdImpl *zeroId = eng->nameId(QLatin1String("0"));
503 for (int i = 0; i < occurrences.count(); ++i) {
504 QScriptValueImpl needle = occurrences.at(i);
505 int index = int (needle.property(indexId).toInteger());
506 output += input.mid(pos, index - pos);
507 int j = 0;
508 while (j < replaceString.length()) {
509 const QChar c = replaceString.at(j++);
510 if ((c == dollar) && (j < replaceString.length())) {
511 const QChar nc = replaceString.at(j);
512 if (nc == dollar) {
513 ++j;
514 } else if (nc == QLatin1Char('`')) {
515 ++j;
516 output += input.left(index);
517 continue;
518 } else if (nc == QLatin1Char('\'')) {
519 ++j;
520 output += input.mid(index + needle.property(zeroId).toString().length());
521 continue;
522 } else if (nc.isDigit()) {
523 ++j;
524 int cap = nc.toLatin1() - '0';
525 if ((j < replaceString.length()) && replaceString.at(j).isDigit()) {
526 cap = cap * 10;
527 cap = replaceString.at(j++).toLatin1() - '0';
528 }
529 output += needle.property(QScriptValueImpl(cap).toString()).toString();
530 continue;
531 }
532 }
533 output += c;
534 }
535 pos = index + needle.property(zeroId).toString().length();
536 }
537 }
538 output += input.mid(pos);
539 } else {
540 // use string representation of searchValue
541 const QString searchString = searchValue.toString();
542 int pos = 0;
543 if (replaceValue.isFunction()) {
544 int index = input.indexOf(searchString, pos);
545 if (index != -1) {
546 output += input.mid(pos, index - pos);
547 QScriptValueImplList args;
548 args << QScriptValueImpl(eng, searchString);
549 args << QScriptValueImpl(index);
550 args << QScriptValueImpl(eng, input);
551 QScriptValueImpl ret = replaceValue.call(eng->nullValue(), args);
552 output += ret.toString();
553 pos = index + searchString.length();
554 }
555 } else {
556 // use string representation of replaceValue
557 const QString replaceString = replaceValue.toString();
558 const QLatin1Char dollar = QLatin1Char('$');
559 int index = input.indexOf(searchString, pos);
560 if (index != -1) {
561 output += input.mid(pos, index - pos);
562 int j = 0;
563 while (j < replaceString.length()) {
564 const QChar c = replaceString.at(j++);
565 if ((c == dollar) && (j < replaceString.length())) {
566 const QChar nc = replaceString.at(j);
567 if (nc == dollar) {
568 ++j;
569 } else if (nc == QLatin1Char('`')) {
570 output += input.left(index);
571 ++j;
572 continue;
573 } else if (nc == QLatin1Char('\'')) {
574 output += input.mid(index + searchString.length());
575 ++j;
576 continue;
577 }
578 }
579 output += c;
580 }
581 pos = index + searchString.length();
582 }
583 }
584 output += input.mid(pos);
585 }
586 return QScriptValueImpl(eng, output);
587}
588
589QScriptValueImpl String::method_search(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
590{
591 QScriptValueImpl pattern = context->argument(0);
592
593 Ecma::RegExp::Instance *rx_data = 0;
594 if (0 == (rx_data = eng->regexpConstructor->get(pattern))) {
595 eng->regexpConstructor->newRegExp(&pattern, context->argument(0).toString(), /*flags=*/0);
596 rx_data = eng->regexpConstructor->get(pattern);
597 }
598
599 QString value = context->thisObject().toString();
600#ifndef QT_NO_REGEXP
601 return (QScriptValueImpl(value.indexOf(rx_data->value)));
602#else
603 return eng->nullValue();
604#endif
605}
606
607QScriptValueImpl String::method_slice(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
608{
609 QString text = context->thisObject().toString();
610 int length = text.length();
611
612 int start = int (context->argument(0).toInteger());
613 int end = context->argument(1).isUndefined()
614 ? length : int (context->argument(1).toInteger());
615
616 if (start < 0)
617 start = qMax(length + start, 0);
618 else
619 start = qMin(start, length);
620
621 if (end < 0)
622 end = qMax(length + end, 0);
623 else
624 end = qMin(end, length);
625
626 int count = qMax(0, end - start);
627 return (QScriptValueImpl(eng, text.mid(start, count)));
628}
629
630QScriptValueImpl String::method_split(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
631{
632 QScriptValueImpl l = context->argument(1);
633 quint32 lim = l.isUndefined() ? UINT_MAX : QScriptEnginePrivate::toUint32(l.toNumber());
634
635 if (lim == 0)
636 return eng->newArray();
637
638 QString S = context->thisObject().toString();
639 QScriptValueImpl separator = context->argument(0);
640
641 QScript::Array A(eng);
642 // the argumentCount() check is for compatibility with spidermonkey;
643 // it is not according to ECMA-262
644 if (separator.isUndefined() && (context->argumentCount() == 0)) {
645 A.assign(0, QScriptValueImpl(eng, S));
646 } else {
647 QStringList matches;
648#ifndef QT_NO_REGEXP
649 if (Ecma::RegExp::Instance *rx = eng->regexpConstructor->get(separator)) {
650 matches = S.split(rx->value, rx->value.pattern().isEmpty()
651 ? QString::SkipEmptyParts : QString::KeepEmptyParts);
652 } else
653#endif // QT_NO_REGEXP
654 {
655 QString sep = separator.toString();
656 matches = S.split(sep, sep.isEmpty()
657 ? QString::SkipEmptyParts : QString::KeepEmptyParts);
658 }
659 uint count = qMin(lim, uint(matches.count()));
660 for (uint i = 0; i < count; ++i)
661 A.assign(i, QScriptValueImpl(eng, matches.at(i)));
662 }
663
664 return eng->newArray(A);
665}
666
667QScriptValueImpl String::method_substr(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
668{
669 QString value = context->thisObject().toString();
670
671 qsreal start = 0;
672 if (context->argumentCount() > 0)
673 start = context->argument(0).toInteger();
674
675 qsreal length = +qInf();
676 if (context->argumentCount() > 1)
677 length = context->argument(1).toInteger();
678
679 qsreal count = value.length();
680 if (start < 0)
681 start = qMax(count + start, 0.0);
682
683 length = qMin(qMax(length, 0.0), count - start);
684
685 qint32 x = QScriptEnginePrivate::toInt32(start);
686 qint32 y = QScriptEnginePrivate::toInt32(length);
687 return QScriptValueImpl(eng, value.mid(x, y));
688}
689
690QScriptValueImpl String::method_substring(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
691{
692 QString value = context->thisObject().toString();
693 int length = value.length();
694
695 qsreal start = 0;
696 qsreal end = length;
697
698 if (context->argumentCount() > 0)
699 start = context->argument(0).toInteger();
700
701 if (context->argumentCount() > 1)
702 end = context->argument(1).toInteger();
703
704 if (qIsNaN(start) || start < 0)
705 start = 0;
706
707 if (qIsNaN(end) || end < 0)
708 end = 0;
709
710 if (start > length)
711 start = length;
712
713 if (end > length)
714 end = length;
715
716 if (start > end) {
717 qsreal was = start;
718 start = end;
719 end = was;
720 }
721
722 qint32 x = QScriptEnginePrivate::toInt32(start);
723 qint32 y = QScriptEnginePrivate::toInt32(end - start);
724
725 return (QScriptValueImpl(eng, value.mid(x, y)));
726}
727
728QScriptValueImpl String::method_toLowerCase(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
729{
730 QString value = context->thisObject().toString();
731 return (QScriptValueImpl(eng, value.toLower()));
732}
733
734QScriptValueImpl String::method_toLocaleLowerCase(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *classInfo)
735{
736 return method_toLowerCase(context, eng, classInfo); // ### check me
737}
738
739QScriptValueImpl String::method_toUpperCase(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
740{
741 QString value = context->thisObject().toString();
742 return (QScriptValueImpl(eng, value.toUpper()));
743}
744
745QScriptValueImpl String::method_toLocaleUpperCase(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *classInfo)
746{
747 return method_toUpperCase(context, eng, classInfo); // ### check me
748}
749
750QScriptValueImpl String::method_fromCharCode(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
751{
752 QString str;
753 for (int i = 0; i < context->argumentCount(); ++i) {
754 QChar c(context->argument(i).toUInt16());
755 str += c;
756 }
757 return (QScriptValueImpl(eng, str));
758}
759
760// Qt extensions
761
762QScriptValueImpl String::method_ext_arg(QScriptContextPrivate *context, QScriptEnginePrivate *eng, QScriptClassInfo *)
763{
764 QString value = context->thisObject().toString();
765 QScriptValueImpl arg = context->argument(0);
766 QString result;
767 if (arg.isString())
768 result = value.arg(arg.toString());
769 else if (arg.isNumber())
770 result = value.arg(arg.toNumber());
771 return QScriptValueImpl(eng, result);
772}
773
774} } // namespace QScript::Ecma
775
776QT_END_NAMESPACE
777
778#endif // QT_NO_SCRIPT
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