summaryrefslogtreecommitdiffstats
path: root/tools/linguist/shared/xliff.cpp
blob: 40fbcabc1954cd2dc037daa7c5e14f6a5594324c (plain)
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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
/****************************************************************************
**
** 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 Qt Linguist 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 "translator.h"

#include <QtCore/QDebug>
#include <QtCore/QMap>
#include <QtCore/QStack>
#include <QtCore/QString>
#include <QtCore/QTextCodec>
#include <QtCore/QTextStream>

#include <QtXml/QXmlAttributes>
#include <QtXml/QXmlDefaultHandler>
#include <QtXml/QXmlParseException>


// The string value is historical and reflects the main purpose: Keeping
// obsolete entries separate from the magic file message (which both have
// no location information, but typically reside at opposite ends of the file).
#define MAGIC_OBSOLETE_REFERENCE "Obsolete_PO_entries"

QT_BEGIN_NAMESPACE

/**
 * Implementation of XLIFF file format for Linguist
 */
//static const char *restypeDomain = "x-gettext-domain";
static const char *restypeContext = "x-trolltech-linguist-context";
static const char *restypePlurals = "x-gettext-plurals";
static const char *restypeDummy = "x-dummy";
static const char *dataTypeUIFile = "x-trolltech-designer-ui";
static const char *contextMsgctxt = "x-gettext-msgctxt"; // XXX Troll invention, so far.
static const char *contextOldMsgctxt = "x-gettext-previous-msgctxt"; // XXX Troll invention, so far.
static const char *attribPlural = "trolltech:plural";
static const char *XLIFF11namespaceURI = "urn:oasis:names:tc:xliff:document:1.1";
static const char *XLIFF12namespaceURI = "urn:oasis:names:tc:xliff:document:1.2";
static const char *TrollTsNamespaceURI = "urn:trolltech:names:ts:document:1.0";

#define COMBINE4CHARS(c1, c2, c3, c4) \
    (int(c1) << 24 | int(c2) << 16 | int(c3) << 8 | int(c4) )

static QString dataType(const TranslatorMessage &m)
{
    QByteArray fileName = m.fileName().toAscii();
    unsigned int extHash = 0;
    int pos = fileName.count() - 1;
    for (int pass = 0; pass < 4 && pos >=0; ++pass, --pos) {
        if (fileName.at(pos) == '.')
            break;
        extHash |= ((int)fileName.at(pos) << (8*pass));
    }

    switch (extHash) {
        case COMBINE4CHARS(0,'c','p','p'):
        case COMBINE4CHARS(0,'c','x','x'):
        case COMBINE4CHARS(0,'c','+','+'):
        case COMBINE4CHARS(0,'h','p','p'):
        case COMBINE4CHARS(0,'h','x','x'):
        case COMBINE4CHARS(0,'h','+','+'):
            return QLatin1String("cpp");
        case COMBINE4CHARS(0, 0 , 0 ,'c'):
        case COMBINE4CHARS(0, 0 , 0 ,'h'):
        case COMBINE4CHARS(0, 0 ,'c','c'):
        case COMBINE4CHARS(0, 0 ,'c','h'):
        case COMBINE4CHARS(0, 0 ,'h','h'):
            return QLatin1String("c");
        case COMBINE4CHARS(0, 0 ,'u','i'):
            return QLatin1String(dataTypeUIFile);   //### form?
        default:
            return QLatin1String("plaintext");      // we give up
    }
}

static void writeIndent(QTextStream &ts, int indent)
{
    ts << QString().fill(QLatin1Char(' '), indent * 2);
}

struct CharMnemonic
{
    char ch;
    char escape;
    const char *mnemonic;
};

static const CharMnemonic charCodeMnemonics[] = {
    {0x07, 'a', "bel"},
    {0x08, 'b', "bs"},
    {0x09, 't', "tab"},
    {0x0a, 'n', "lf"},
    {0x0b, 'v', "vt"},
    {0x0c, 'f', "ff"},
    {0x0d, 'r', "cr"}
};

static char charFromEscape(char escape)
{
    for (uint i = 0; i < sizeof(charCodeMnemonics)/sizeof(CharMnemonic); ++i) {
        CharMnemonic cm =  charCodeMnemonics[i];
        if (cm.escape == escape)
            return cm.ch;
    }
    Q_ASSERT(0);
    return escape;
}

static QString numericEntity(int ch, bool makePhs)
{
    // ### This needs to be reviewed, to reflect the updated XLIFF-PO spec.
    if (!makePhs || ch < 7 || ch > 0x0d)
        return QString::fromAscii("&#x%1;").arg(QString::number(ch, 16));

    CharMnemonic cm = charCodeMnemonics[int(ch) - 7];
    QString name = QLatin1String(cm.mnemonic);
    char escapechar = cm.escape;

    static int id = 0;
    return QString::fromAscii("<ph id=\"ph%1\" ctype=\"x-ch-%2\">\\%3</ph>")
              .arg(++id) .arg(name) .arg(escapechar);
}

static QString protect(const QString &str, bool makePhs = true)
{
    QString result;
    int len = str.size();
    for (int i = 0; i != len; ++i) {
        uint c = str.at(i).unicode();
        switch (c) {
        case '\"':
            result += QLatin1String("&quot;");
            break;
        case '&':
            result += QLatin1String("&amp;");
            break;
        case '>':
            result += QLatin1String("&gt;");
            break;
        case '<':
            result += QLatin1String("&lt;");
            break;
        case '\'':
            result += QLatin1String("&apos;");
            break;
        default:
            if (c < 0x20 && c != '\r' && c != '\n' && c != '\t')
                result += numericEntity(c, makePhs);
            else // this also covers surrogates
                result += QChar(c);
        }
    }
    return result;
}


static void writeExtras(QTextStream &ts, int indent,
                        const TranslatorMessage::ExtraData &extras, const QRegExp &drops)
{
    for (Translator::ExtraData::ConstIterator it = extras.begin(); it != extras.end(); ++it) {
        if (!drops.exactMatch(it.key())) {
            writeIndent(ts, indent);
            ts << "<trolltech:" << it.key() << '>'
               << protect(it.value())
               << "</trolltech:" << it.key() << ">\n";
        }
    }
}

static void writeLineNumber(QTextStream &ts, const TranslatorMessage &msg, int indent)
{
    if (msg.lineNumber() == -1)
        return;
    writeIndent(ts, indent);
    ts << "<context-group purpose=\"location\"><context context-type=\"linenumber\">"
       << msg.lineNumber() << "</context></context-group>\n";
    foreach (const TranslatorMessage::Reference &ref, msg.extraReferences()) {
        writeIndent(ts, indent);
        ts << "<context-group purpose=\"location\">";
        if (ref.fileName() != msg.fileName())
            ts << "<context context-type=\"sourcefile\">" << ref.fileName() << "</context>";
        ts << "<context context-type=\"linenumber\">" << ref.lineNumber()
           << "</context></context-group>\n";
    }
}

static void writeComment(QTextStream &ts, const TranslatorMessage &msg, const QRegExp &drops, int indent)
{
    if (!msg.comment().isEmpty()) {
        writeIndent(ts, indent);
        ts << "<context-group><context context-type=\"" << contextMsgctxt << "\">"
           << protect(msg.comment(), false)
           << "</context></context-group>\n";
    }
    if (!msg.oldComment().isEmpty()) {
        writeIndent(ts, indent);
        ts << "<context-group><context context-type=\"" << contextOldMsgctxt << "\">"
           << protect(msg.oldComment(), false)
           << "</context></context-group>\n";
    }
    writeExtras(ts, indent, msg.extras(), drops);
    if (!msg.extraComment().isEmpty()) {
        writeIndent(ts, indent);
        ts << "<note annotates=\"source\" from=\"developer\">"
           << protect(msg.extraComment()) << "</note>\n";
    }
    if (!msg.translatorComment().isEmpty()) {
        writeIndent(ts, indent);
        ts << "<note from=\"translator\">"
           << protect(msg.translatorComment()) << "</note>\n";
    }
}

static void writeTransUnits(QTextStream &ts, const TranslatorMessage &msg, const QRegExp &drops, int indent)
{
    static int msgid;
    QString msgidstr = !msg.id().isEmpty() ? msg.id() : QString::fromAscii("_msg%1").arg(++msgid);

    QStringList translns = msg.translations();
    QHash<QString, QString>::const_iterator it;
    QString pluralStr;
    QStringList sources(msg.sourceText());
    if ((it = msg.extras().find(QString::fromLatin1("po-msgid_plural"))) != msg.extras().end())
        sources.append(*it);
    QStringList oldsources;
    if (!msg.oldSourceText().isEmpty())
        oldsources.append(msg.oldSourceText());
    if ((it = msg.extras().find(QString::fromLatin1("po-old_msgid_plural"))) != msg.extras().end()) {
        if (oldsources.isEmpty()) {
            if (sources.count() == 2)
                oldsources.append(QString());
            else
                pluralStr = QLatin1Char(' ') + QLatin1String(attribPlural) + QLatin1String("=\"yes\"");
        }
        oldsources.append(*it);
    }

    QStringList::const_iterator
        srcit = sources.begin(), srcend = sources.end(),
        oldsrcit = oldsources.begin(), oldsrcend = oldsources.end(),
        transit = translns.begin(), transend = translns.end();
    int plural = 0;
    QString source;
    while (srcit != srcend || oldsrcit != oldsrcend || transit != transend) {
        QByteArray attribs;
        QByteArray state;
        if (msg.type() == TranslatorMessage::Obsolete) {
            if (!msg.isPlural())
                attribs = " translate=\"no\"";
        } else if (msg.type() == TranslatorMessage::Finished) {
            attribs = " approved=\"yes\"";
        } else if (transit != transend && !transit->isEmpty()) {
            state = " state=\"needs-review-translation\"";
        }
        writeIndent(ts, indent);
        ts << "<trans-unit id=\"" << msgidstr;
        if (msg.isPlural())
            ts << "[" << plural++ << "]";
        ts << "\"" << attribs << ">\n";
        ++indent;

        writeIndent(ts, indent);
        if (srcit != srcend) {
            source = *srcit;
            ++srcit;
        } // else just repeat last element
        ts << "<source xml:space=\"preserve\">" << protect(source) << "</source>\n";

        bool puttrans = false;
        QString translation;
        if (transit != transend) {
            translation = *transit;
            translation.replace(QChar(Translator::BinaryVariantSeparator),
                                QChar(Translator::TextVariantSeparator));
            ++transit;
            puttrans = true;
        }
        do {
            if (oldsrcit != oldsrcend && !oldsrcit->isEmpty()) {
                writeIndent(ts, indent);
                ts << "<alt-trans>\n";
                ++indent;
                writeIndent(ts, indent);
                ts << "<source xml:space=\"preserve\"" << pluralStr << '>' << protect(*oldsrcit) << "</source>\n";
                if (!puttrans) {
                    writeIndent(ts, indent);
                    ts << "<target restype=\"" << restypeDummy << "\"/>\n";
                }
            }

            if (puttrans) {
                writeIndent(ts, indent);
                ts << "<target xml:space=\"preserve\"" << state << ">" << protect(translation) << "</target>\n";
            }

            if (oldsrcit != oldsrcend) {
                if (!oldsrcit->isEmpty()) {
                    --indent;
                    writeIndent(ts, indent);
                    ts << "</alt-trans>\n";
                }
                ++oldsrcit;
            }

            puttrans = false;
        } while (srcit == srcend && oldsrcit != oldsrcend);

        if (!msg.isPlural()) {
            writeLineNumber(ts, msg, indent);
            writeComment(ts, msg, drops, indent);
        }

        --indent;
        writeIndent(ts, indent);
        ts << "</trans-unit>\n";
    }
}

static void writeMessage(QTextStream &ts, const TranslatorMessage &msg, const QRegExp &drops, int indent)
{
    if (msg.isPlural()) {
        writeIndent(ts, indent);
        ts << "<group restype=\"" << restypePlurals << "\"";
        if (!msg.id().isEmpty())
            ts << " id=\"" << msg.id() << "\"";
        if (msg.type() == TranslatorMessage::Obsolete)
            ts << " translate=\"no\"";
        ts << ">\n";
        ++indent;
        writeLineNumber(ts, msg, indent);
        writeComment(ts, msg, drops, indent);

        writeTransUnits(ts, msg, drops, indent);
        --indent;
        writeIndent(ts, indent);
        ts << "</group>\n";
    } else {
        writeTransUnits(ts, msg, drops, indent);
    }
}


class XLIFFHandler : public QXmlDefaultHandler
{
public:
    XLIFFHandler(Translator &translator, ConversionData &cd);

    bool startElement(const QString& namespaceURI, const QString &localName,
        const QString &qName, const QXmlAttributes &atts );
    bool endElement(const QString& namespaceURI, const QString &localName,
        const QString &qName );
    bool characters(const QString &ch);
    bool fatalError(const QXmlParseException &exception);

    bool endDocument();

private:
    enum XliffContext {
        XC_xliff,
        XC_group,
        XC_trans_unit,
        XC_context_group,
        XC_context_group_any,
        XC_context,
        XC_context_filename,
        XC_context_linenumber,
        XC_context_context,
        XC_context_comment,
        XC_context_old_comment,
        XC_ph,
        XC_extra_comment,
        XC_translator_comment,
        XC_restype_context,
        XC_restype_translation,
        XC_restype_plurals,
        XC_alt_trans
    };
    void pushContext(XliffContext ctx);
    bool popContext(XliffContext ctx);
    XliffContext currentContext() const;
    bool hasContext(XliffContext ctx) const;
    bool finalizeMessage(bool isPlural);

private:
    Translator &m_translator;
    ConversionData &m_cd;
    TranslatorMessage::Type m_type;
    QString m_language;
    QString m_sourceLanguage;
    QString m_context;
    QString m_id;
    QStringList m_sources;
    QStringList m_oldSources;
    QString m_comment;
    QString m_oldComment;
    QString m_extraComment;
    QString m_translatorComment;
    bool m_isPlural;
    bool m_hadAlt;
    QStringList m_translations;
    QString m_fileName;
    int     m_lineNumber;
    QString m_extraFileName;
    TranslatorMessage::References m_refs;
    TranslatorMessage::ExtraData m_extra;

    QString accum;
    QString m_ctype;
    const QString m_URITT;  // convenience and efficiency
    const QString m_URI;  // ...
    const QString m_URI12;  // ...
    QStack<int> m_contextStack;
};

XLIFFHandler::XLIFFHandler(Translator &translator, ConversionData &cd)
  : m_translator(translator), m_cd(cd),
    m_type(TranslatorMessage::Finished),
    m_lineNumber(-1),
    m_URITT(QLatin1String(TrollTsNamespaceURI)),
    m_URI(QLatin1String(XLIFF11namespaceURI)),
    m_URI12(QLatin1String(XLIFF12namespaceURI))
{}


void XLIFFHandler::pushContext(XliffContext ctx)
{
    m_contextStack.push_back(ctx);
}

// Only pops it off if the top of the stack contains ctx
bool XLIFFHandler::popContext(XliffContext ctx)
{
    if (!m_contextStack.isEmpty() && m_contextStack.top() == ctx) {
        m_contextStack.pop();
        return true;
    }
    return false;
}

XLIFFHandler::XliffContext XLIFFHandler::currentContext() const
{
    if (!m_contextStack.isEmpty())
        return (XliffContext)m_contextStack.top();
    return XC_xliff;
}

// traverses to the top to check all of the parent contexes.
bool XLIFFHandler::hasContext(XliffContext ctx) const
{
    for (int i = m_contextStack.count() - 1; i >= 0; --i) {
        if (m_contextStack.at(i) == ctx)
            return true;
    }
    return false;
}

bool XLIFFHandler::startElement(const QString& namespaceURI,
    const QString &localName, const QString &qName, const QXmlAttributes &atts )
{
    Q_UNUSED(qName);
    if (namespaceURI == m_URITT)
        goto bail;
    if (namespaceURI != m_URI && namespaceURI != m_URI12)
        return false;
    if (localName == QLatin1String("xliff")) {
        // make sure that the stack is not empty during parsing
        pushContext(XC_xliff);
    } else if (localName == QLatin1String("file")) {
        m_fileName = atts.value(QLatin1String("original"));
        m_language = atts.value(QLatin1String("target-language"));
        m_language.replace(QLatin1Char('-'), QLatin1Char('_'));
        m_sourceLanguage = atts.value(QLatin1String("source-language"));
        m_sourceLanguage.replace(QLatin1Char('-'), QLatin1Char('_'));
        if (m_sourceLanguage == QLatin1String("en"))
            m_sourceLanguage.clear();
    } else if (localName == QLatin1String("group")) {
        if (atts.value(QLatin1String("restype")) == QLatin1String(restypeContext)) {
            m_context = atts.value(QLatin1String("resname"));
            pushContext(XC_restype_context);
        } else {
            if (atts.value(QLatin1String("restype")) == QLatin1String(restypePlurals)) {
                pushContext(XC_restype_plurals);
                m_id = atts.value(QLatin1String("id"));
                if (atts.value(QLatin1String("translate")) == QLatin1String("no"))
                    m_type = TranslatorMessage::Obsolete;
            } else {
                pushContext(XC_group);
            }
        }
    } else if (localName == QLatin1String("trans-unit")) {
        if (!hasContext(XC_restype_plurals) || m_sources.isEmpty() /* who knows ... */)
            if (atts.value(QLatin1String("translate")) == QLatin1String("no"))
                m_type = TranslatorMessage::Obsolete;
        if (!hasContext(XC_restype_plurals)) {
            m_id = atts.value(QLatin1String("id"));
            if (m_id.startsWith(QLatin1String("_msg")))
                m_id.clear();
        }
        if (m_type != TranslatorMessage::Obsolete &&
            atts.value(QLatin1String("approved")) != QLatin1String("yes"))
            m_type = TranslatorMessage::Unfinished;
        pushContext(XC_trans_unit);
        m_hadAlt = false;
    } else if (localName == QLatin1String("alt-trans")) {
        pushContext(XC_alt_trans);
    } else if (localName == QLatin1String("source")) {
        m_isPlural = atts.value(QLatin1String(attribPlural)) == QLatin1String("yes");
    } else if (localName == QLatin1String("target")) {
        if (atts.value(QLatin1String("restype")) != QLatin1String(restypeDummy))
            pushContext(XC_restype_translation);
    } else if (localName == QLatin1String("context-group")) {
        QString purpose = atts.value(QLatin1String("purpose"));
        if (purpose == QLatin1String("location"))
            pushContext(XC_context_group);
        else
            pushContext(XC_context_group_any);
    } else if (currentContext() == XC_context_group && localName == QLatin1String("context")) {
        QString ctxtype = atts.value(QLatin1String("context-type"));
        if (ctxtype == QLatin1String("linenumber"))
            pushContext(XC_context_linenumber);
        else if (ctxtype == QLatin1String("sourcefile"))
            pushContext(XC_context_filename);
    } else if (currentContext() == XC_context_group_any && localName == QLatin1String("context")) {
        QString ctxtype = atts.value(QLatin1String("context-type"));
        if (ctxtype == QLatin1String(contextMsgctxt))
            pushContext(XC_context_comment);
        else if (ctxtype == QLatin1String(contextOldMsgctxt))
            pushContext(XC_context_old_comment);
    } else if (localName == QLatin1String("note")) {
        if (atts.value(QLatin1String("annotates")) == QLatin1String("source") &&
            atts.value(QLatin1String("from")) == QLatin1String("developer"))
            pushContext(XC_extra_comment);
        else
            pushContext(XC_translator_comment);
    } else if (localName == QLatin1String("ph")) {
        QString ctype = atts.value(QLatin1String("ctype"));
        if (ctype.startsWith(QLatin1String("x-ch-")))
            m_ctype = ctype.mid(5);
        pushContext(XC_ph);
    }
bail:
    if (currentContext() != XC_ph)
        accum.clear();
    return true;
}

bool XLIFFHandler::endElement(const QString &namespaceURI, const QString& localName,
    const QString &qName)
{
    Q_UNUSED(qName);
    if (namespaceURI == m_URITT) {
        if (hasContext(XC_trans_unit) || hasContext(XC_restype_plurals))
            m_extra[localName] = accum;
        else
            m_translator.setExtra(localName, accum);
        return true;
    }
    if (namespaceURI != m_URI && namespaceURI != m_URI12)
        return false;
    //qDebug() << "URI:" <<  namespaceURI << "QNAME:" << qName;
    if (localName == QLatin1String("xliff")) {
        popContext(XC_xliff);
    } else if (localName == QLatin1String("source")) {
        if (hasContext(XC_alt_trans)) {
            if (m_isPlural && m_oldSources.isEmpty())
                m_oldSources.append(QString());
            m_oldSources.append(accum);
            m_hadAlt = true;
        } else {
            m_sources.append(accum);
        }
    } else if (localName == QLatin1String("target")) {
        if (popContext(XC_restype_translation)) {
            accum.replace(QChar(Translator::TextVariantSeparator),
                          QChar(Translator::BinaryVariantSeparator));
            m_translations.append(accum);
        }
    } else if (localName == QLatin1String("context-group")) {
        if (popContext(XC_context_group)) {
            m_refs.append(TranslatorMessage::Reference(
                m_extraFileName.isEmpty() ? m_fileName : m_extraFileName, m_lineNumber));
            m_extraFileName.clear();
            m_lineNumber = -1;
        } else {
            popContext(XC_context_group_any);
        }
    } else if (localName == QLatin1String("context")) {
        if (popContext(XC_context_linenumber)) {
            bool ok;
            m_lineNumber = accum.trimmed().toInt(&ok);
            if (!ok)
                m_lineNumber = -1;
        } else if (popContext(XC_context_filename)) {
            m_extraFileName = accum;
        } else if (popContext(XC_context_comment)) {
            m_comment = accum;
        } else if (popContext(XC_context_old_comment)) {
            m_oldComment = accum;
        }
    } else if (localName == QLatin1String("note")) {
        if (popContext(XC_extra_comment))
            m_extraComment = accum;
        else if (popContext(XC_translator_comment))
            m_translatorComment = accum;
    } else if (localName == QLatin1String("ph")) {
        m_ctype.clear();
        popContext(XC_ph);
    } else if (localName == QLatin1String("trans-unit")) {
        popContext(XC_trans_unit);
        if (!m_hadAlt)
            m_oldSources.append(QString());
        if (!hasContext(XC_restype_plurals)) {
            if (!finalizeMessage(false))
                return false;
        }
    } else if (localName == QLatin1String("alt-trans")) {
        popContext(XC_alt_trans);
    } else if (localName == QLatin1String("group")) {
        if (popContext(XC_restype_plurals)) {
            if (!finalizeMessage(true))
                return false;
        } else if (popContext(XC_restype_context)) {
            m_context.clear();
        } else {
            popContext(XC_group);
        }
    }
    return true;
}

bool XLIFFHandler::characters(const QString &ch)
{
    if (currentContext() == XC_ph) {
        // handle the content of <ph> elements
        for (int i = 0; i < ch.count(); ++i) {
            QChar chr = ch.at(i);
            if (accum.endsWith(QLatin1Char('\\')))
                accum[accum.size() - 1] = QLatin1Char(charFromEscape(chr.toAscii()));
            else
                accum.append(chr);
        }
    } else {
        QString t = ch;
        t.replace(QLatin1String("\r"), QLatin1String(""));
        accum.append(t);
    }
    return true;
}

bool XLIFFHandler::endDocument()
{
    m_translator.setLanguageCode(m_language);
    m_translator.setSourceLanguageCode(m_sourceLanguage);
    return true;
}

bool XLIFFHandler::finalizeMessage(bool isPlural)
{
    if (m_sources.isEmpty()) {
        m_cd.appendError(QLatin1String("XLIFF syntax error: Message without source string."));
        return false;
    }
    if (m_type == TranslatorMessage::Obsolete && m_refs.size() == 1
        && m_refs.at(0).fileName() == QLatin1String(MAGIC_OBSOLETE_REFERENCE))
        m_refs.clear();
    TranslatorMessage msg(m_context, m_sources[0],
                          m_comment, QString(), QString(), -1,
                          m_translations, m_type, isPlural);
    msg.setId(m_id);
    msg.setReferences(m_refs);
    msg.setOldComment(m_oldComment);
    msg.setExtraComment(m_extraComment);
    msg.setTranslatorComment(m_translatorComment);
    if (m_sources.count() > 1 && m_sources[1] != m_sources[0])
        m_extra.insert(QLatin1String("po-msgid_plural"), m_sources[1]);
    if (!m_oldSources.isEmpty()) {
        if (!m_oldSources[0].isEmpty())
            msg.setOldSourceText(m_oldSources[0]);
        if (m_oldSources.count() > 1 && m_oldSources[1] != m_oldSources[0])
            m_extra.insert(QLatin1String("po-old_msgid_plural"), m_oldSources[1]);
    }
    msg.setExtras(m_extra);
    m_translator.append(msg);

    m_id.clear();
    m_sources.clear();
    m_oldSources.clear();
    m_translations.clear();
    m_comment.clear();
    m_oldComment.clear();
    m_extraComment.clear();
    m_translatorComment.clear();
    m_extra.clear();
    m_refs.clear();
    m_type = TranslatorMessage::Finished;
    return true;
}

bool XLIFFHandler::fatalError(const QXmlParseException &exception)
{
    QString msg;
    msg.sprintf("XML error: Parse error at line %d, column %d (%s).\n",
                 exception.lineNumber(), exception.columnNumber(),
                 exception.message().toLatin1().data() );
    m_cd.appendError(msg);
    return false;
}

bool loadXLIFF(Translator &translator, QIODevice &dev, ConversionData &cd)
{
    QXmlInputSource in(&dev);
    QXmlSimpleReader reader;
    XLIFFHandler hand(translator, cd);
    reader.setContentHandler(&hand);
    reader.setErrorHandler(&hand);
    return reader.parse(in);
}

bool saveXLIFF(const Translator &translator, QIODevice &dev, ConversionData &cd)
{
    bool ok = true;
    int indent = 0;

    QTextStream ts(&dev);
    ts.setCodec(QTextCodec::codecForName("UTF-8"));

    QStringList dtgs = cd.dropTags();
    dtgs << QLatin1String("po-(old_)?msgid_plural");
    QRegExp drops(dtgs.join(QLatin1String("|")));

    QHash<QString, QHash<QString, QList<TranslatorMessage> > > messageOrder;
    QHash<QString, QList<QString> > contextOrder;
    QList<QString> fileOrder;
    foreach (const TranslatorMessage &msg, translator.messages()) {
        QString fn = msg.fileName();
        if (fn.isEmpty() && msg.type() == TranslatorMessage::Obsolete)
            fn = QLatin1String(MAGIC_OBSOLETE_REFERENCE);
        QHash<QString, QList<TranslatorMessage> > &file = messageOrder[fn];
        if (file.isEmpty())
            fileOrder.append(fn);
        QList<TranslatorMessage> &context = file[msg.context()];
        if (context.isEmpty())
            contextOrder[fn].append(msg.context());
        context.append(msg);
    }

    ts.setFieldAlignment(QTextStream::AlignRight);
    ts << "<?xml version=\"1.0\"";
    ts << " encoding=\"utf-8\"?>\n";
    ts << "<xliff version=\"1.2\" xmlns=\"" << XLIFF12namespaceURI
       << "\" xmlns:trolltech=\"" << TrollTsNamespaceURI << "\">\n";
    ++indent;
    writeExtras(ts, indent, translator.extras(), drops);
    QString sourceLanguageCode = translator.sourceLanguageCode();
    if (sourceLanguageCode.isEmpty() || sourceLanguageCode == QLatin1String("C"))
        sourceLanguageCode = QLatin1String("en");
    else
        sourceLanguageCode.replace(QLatin1Char('_'), QLatin1Char('-'));
    QString languageCode = translator.languageCode();
    languageCode.replace(QLatin1Char('_'), QLatin1Char('-'));
    foreach (const QString &fn, fileOrder) {
        writeIndent(ts, indent);
        ts << "<file original=\"" << fn << "\""
            << " datatype=\"" << dataType(messageOrder[fn].begin()->first()) << "\""
            << " source-language=\"" << sourceLanguageCode.toLatin1() << "\""
            << " target-language=\"" << languageCode.toLatin1() << "\""
            << "><body>\n";
        ++indent;

        foreach (const QString &ctx, contextOrder[fn]) {
            if (!ctx.isEmpty()) {
                writeIndent(ts, indent);
                ts << "<group restype=\"" << restypeContext << "\""
                    << " resname=\"" << protect(ctx) << "\">\n";
                ++indent;
            }

            foreach (const TranslatorMessage &msg, messageOrder[fn][ctx])
                writeMessage(ts, msg, drops, indent);

            if (!ctx.isEmpty()) {
                --indent;
                writeIndent(ts, indent);
                ts << "</group>\n";
            }
        }

        --indent;
        writeIndent(ts, indent);
        ts << "</body></file>\n";
    }
    --indent;
    writeIndent(ts, indent);
    ts << "</xliff>\n";

    return ok;
}

int initXLIFF()
{
    Translator::FileFormat format;
    format.extension = QLatin1String("xlf");
    format.description = QObject::tr("XLIFF localization files");
    format.fileType = Translator::FileFormat::TranslationSource;
    format.priority = 1;
    format.loader = &loadXLIFF;
    format.saver = &saveXLIFF;
    Translator::registerFileFormat(format);
    return 1;
}

Q_CONSTRUCTOR_FUNCTION(initXLIFF)

QT_END_NAMESPACE