summaryrefslogtreecommitdiffstats
path: root/src/gui/text/qtextdocumentwriter.cpp
blob: a3f30dbe5831b284ffc4bd6e2c389049af6d0d5f (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
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qtextdocumentwriter.h"

#include <QtCore/qfile.h>
#include <QtCore/qbytearray.h>
#include <QtCore/qfileinfo.h>
#include <QtCore/qtextcodec.h>
#include <QtCore/qtextstream.h>
#include <QtCore/qdebug.h>
#include "qtextdocument.h"
#include "qtextdocumentfragment.h"

#include "qtextdocumentfragment_p.h"
#include "qtextodfwriter_p.h"

QT_BEGIN_NAMESPACE

class QTextDocumentWriterPrivate
{
public:
    QTextDocumentWriterPrivate(QTextDocumentWriter* qq);

    // device
    QByteArray format;
    QIODevice *device;
    bool deleteDevice;
#ifndef QT_NO_TEXTCODEC
    QTextCodec *codec;
#endif

    QTextDocumentWriter *q;
};

/*!
    \since 4.5
    \class QTextDocumentWriter

    \brief The QTextDocumentWriter class provides a format-independent interface for writing a QTextDocument to files or other devices.

    \ingroup text
    \ingroup io

    To write a document, construct a QTextDocumentWriter object with either a
    file name or a device object, and specify the document format to be
    written. You can construct a writer and set the format using setFormat()
    later.

    Call write() to write the document to the device. If the document is
    successfully written, this function returns true. However, if an error
    occurs when writing the document, it will return false.

    Call supportedDocumentFormats() for a list of formats that
    QTextDocumentWriter can write.

    Since the capabilities of the supported output formats vary considerably,
    the writer simply outputs the appropriate subset of objects for each format.
    This typically includes the formatted text and images contained in a
    document.
*/

/*!
    \internal
*/
QTextDocumentWriterPrivate::QTextDocumentWriterPrivate(QTextDocumentWriter *qq)
    : device(0),
    deleteDevice(false),
#ifndef QT_NO_TEXTCODEC
    codec(QTextCodec::codecForName("utf-8")),
#endif
    q(qq)
{
}

/*!
    Constructs an empty QTextDocumentWriter object. Before writing, you must
    call setFormat() to set a document format, then setDevice() or
    setFileName().
*/
QTextDocumentWriter::QTextDocumentWriter()
    : d(new QTextDocumentWriterPrivate(this))
{
}

/*!
    Constructs a QTextDocumentWriter object to write to the given \a device
    in the document format specified by \a format.
*/
QTextDocumentWriter::QTextDocumentWriter(QIODevice *device, const QByteArray &format)
    : d(new QTextDocumentWriterPrivate(this))
{
    d->device = device;
    d->format = format;
}

/*!
    Constructs an QTextDocumentWriter object that will write to a file with
    the name \a fileName, using the document format specified by \a format.
    If \a format is not provided, QTextDocumentWriter will detect the document
    format by inspecting the extension of \a fileName.
*/
QTextDocumentWriter::QTextDocumentWriter(const QString &fileName, const QByteArray &format)
    : d(new QTextDocumentWriterPrivate(this))
{
    QFile *file = new QFile(fileName);
    d->device = file;
    d->deleteDevice = true;
    d->format = format;
}

/*!
    Destroys the QTextDocumentWriter object.
*/
QTextDocumentWriter::~QTextDocumentWriter()
{
    if (d->deleteDevice)
        delete d->device;
    delete d;
}

/*!
    Sets the format used to write documents to the \a format specified.
    \a format is a case insensitive text string. For example:

    \snippet doc/src/snippets/code/src.gui.text.qtextdocumentwriter.cpp 0

    You can call supportedDocumentFormats() for the full list of formats
    QTextDocumentWriter supports.

    \sa format()
*/
void QTextDocumentWriter::setFormat (const QByteArray &format)
{
    d->format = format;
}

/*!
    Returns the format used for writing documents.

    \sa setFormat()
*/
QByteArray QTextDocumentWriter::format () const
{
    return d->format;
}

/*!
    Sets the writer's device to the \a device specified. If a device has
    already been set, the old device is removed but otherwise left
    unchanged.

    If the device is not already open, QTextDocumentWriter will attempt to
    open the device in \l QIODevice::WriteOnly mode by calling open().

    \note This will not work for certain devices, such as QProcess,
    QTcpSocket and QUdpSocket, where some configuration is required before
    the device can be opened.

    \sa device(), setFileName()
*/
void QTextDocumentWriter::setDevice (QIODevice *device)
{
    if (d->device && d->deleteDevice)
        delete d->device;

    d->device = device;
    d->deleteDevice = false;
}

/*!
    Returns the device currently assigned, or 0 if no device has been
    assigned.
*/
QIODevice *QTextDocumentWriter::device () const
{
    return d->device;
}

/*!
    Sets the name of the file to be written to \a fileName. Internally,
    QTextDocumentWriter will create a QFile and open it in \l
    QIODevice::WriteOnly mode, and use this file when writing the document.

    \sa fileName(), setDevice()
*/
void QTextDocumentWriter::setFileName (const QString &fileName)
{
    setDevice(new QFile(fileName));
    d->deleteDevice = true;
}

/*!
    If the currently assigned device is a QFile, or if setFileName()
    has been called, this function returns the name of the file
    to be written to. In all other cases, it returns an empty string.

    \sa setFileName(), setDevice()
*/
QString QTextDocumentWriter::fileName () const
{
    QFile *file = qobject_cast<QFile *>(d->device);
    return file ? file->fileName() : QString();
}

/*!
    Writes the given \a document to the assigned device or file and
    returns true if successful; otherwise returns false.
*/
bool QTextDocumentWriter::write(const QTextDocument *document)
{
    QByteArray suffix;

    if (d->device && d->format.isEmpty()) {
        // if there's no format, see if device is a file, and if so, find
        // the file suffix
        if (QFile *file = qobject_cast<QFile *>(d->device))
            suffix = QFileInfo(file->fileName()).suffix().toLower().toLatin1();
    }

    QByteArray format = !d->format.isEmpty() ? d->format.toLower() : suffix;

#ifndef QT_NO_TEXTODFWRITER
    if (format == "odf" || format == "opendocumentformat" || format == "odt") {
        QTextOdfWriter writer(*document, d->device);
#ifndef QT_NO_TEXTCODEC
        writer.setCodec(d->codec);
#endif
        return writer.writeAll();
    }
#endif // QT_NO_TEXTODFWRITER

#ifndef QT_NO_TEXTHTMLPARSER
    if (format == "html" || format == "htm") {
        if (!d->device->isWritable() && ! d->device->open(QIODevice::WriteOnly)) {
            qWarning() << "QTextDocumentWriter::write: the device can not be opened for writing";
            return false;
        }
        QTextStream ts(d->device);
#ifndef QT_NO_TEXTCODEC
        ts.setCodec(d->codec);
        ts << document->toHtml(d->codec->name());
#endif
        d->device->close();
        return true;
    }
#endif
    if (format == "txt" || format == "plaintext") {
        if (!d->device->isWritable() && ! d->device->open(QIODevice::WriteOnly)) {
            qWarning() << "QTextDocumentWriter::write: the device can not be opened for writing";
            return false;
        }
        QTextStream ts(d->device);
#ifndef QT_NO_TEXTCODEC
        ts.setCodec(d->codec);
#endif
        ts << document->toPlainText();
        d->device->close();
        return true;
    }

    return false;
}

/*!
    Writes the document fragment specified by \a fragment to the assigned device
    or file and returns true if successful; otherwise returns false.
*/
bool QTextDocumentWriter::write(const QTextDocumentFragment &fragment)
{
    if (fragment.d == 0)
        return false; // invalid fragment.
    QTextDocument *doc = fragment.d->doc;
    if (doc)
        return write(doc);
    return false;
}

/*!
    Sets the codec for this stream to \a codec. The codec is used for
    encoding any data that is written. By default, QTextDocumentWriter
    uses UTF-8.
*/

#ifndef QT_NO_TEXTCODEC
void QTextDocumentWriter::setCodec(QTextCodec *codec)
{
    if (codec == 0)
        codec = QTextCodec::codecForName("UTF-8");
    Q_ASSERT(codec);
    d->codec = codec;
}
#endif

/*!
    Returns the codec that is currently assigned to the writer.
*/
#ifndef QT_NO_TEXTCODEC
QTextCodec *QTextDocumentWriter::codec() const
{
    return d->codec;
}
#endif

/*!
    Returns the list of document formats supported by QTextDocumentWriter.

    By default, Qt can write the following formats:

    \table
    \header \o Format    \o Description
    \row    \o plaintext \o Plain text
    \row    \o HTML      \o HyperText Markup Language
    \row    \o ODF       \o OpenDocument Format
    \endtable

    \sa setFormat()
*/
QList<QByteArray> QTextDocumentWriter::supportedDocumentFormats()
{
    QList<QByteArray> answer;
    answer << "plaintext";

#ifndef QT_NO_TEXTHTMLPARSER
    answer << "HTML";
#endif
#ifndef QT_NO_TEXTODFWRITER
    answer << "ODF";
#endif // QT_NO_TEXTODFWRITER

    qSort(answer);
    return answer;
}

QT_END_NAMESPACE