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41 #include "qtextdocumentwriter.h"
43 #include <QtCore/qfile.h>
44 #include <QtCore/qbytearray.h>
45 #include <QtCore/qfileinfo.h>
46 #include <QtCore/qtextcodec.h>
47 #include <QtCore/qtextstream.h>
48 #include <QtCore/qdebug.h>
49 #include "qtextdocument.h"
50 #include "qtextdocumentfragment.h"
52 #include "qtextdocumentfragment_p.h"
53 #include "qtextodfwriter_p.h"
57 class QTextDocumentWriterPrivate
60 QTextDocumentWriterPrivate(QTextDocumentWriter* qq);
66 #ifndef QT_NO_TEXTCODEC
70 QTextDocumentWriter *q;
75 \class QTextDocumentWriter
77 \brief The QTextDocumentWriter class provides a format-independent interface for writing a QTextDocument to files or other devices.
79 \ingroup richtext-processing
82 To write a document, construct a QTextDocumentWriter object with either a
83 file name or a device object, and specify the document format to be
84 written. You can construct a writer and set the format using setFormat()
87 Call write() to write the document to the device. If the document is
88 successfully written, this function returns true. However, if an error
89 occurs when writing the document, it will return false.
91 Call supportedDocumentFormats() for a list of formats that
92 QTextDocumentWriter can write.
94 Since the capabilities of the supported output formats vary considerably,
95 the writer simply outputs the appropriate subset of objects for each format.
96 This typically includes the formatted text and images contained in a
103 QTextDocumentWriterPrivate::QTextDocumentWriterPrivate(QTextDocumentWriter *qq)
106 #ifndef QT_NO_TEXTCODEC
107 codec(QTextCodec::codecForName("utf-8")),
114 Constructs an empty QTextDocumentWriter object. Before writing, you must
115 call setFormat() to set a document format, then setDevice() or
118 QTextDocumentWriter::QTextDocumentWriter()
119 : d(new QTextDocumentWriterPrivate(this))
124 Constructs a QTextDocumentWriter object to write to the given \a device
125 in the document format specified by \a format.
127 QTextDocumentWriter::QTextDocumentWriter(QIODevice *device, const QByteArray &format)
128 : d(new QTextDocumentWriterPrivate(this))
135 Constructs an QTextDocumentWriter object that will write to a file with
136 the name \a fileName, using the document format specified by \a format.
137 If \a format is not provided, QTextDocumentWriter will detect the document
138 format by inspecting the extension of \a fileName.
140 QTextDocumentWriter::QTextDocumentWriter(const QString &fileName, const QByteArray &format)
141 : d(new QTextDocumentWriterPrivate(this))
143 QFile *file = new QFile(fileName);
145 d->deleteDevice = true;
150 Destroys the QTextDocumentWriter object.
152 QTextDocumentWriter::~QTextDocumentWriter()
160 Sets the format used to write documents to the \a format specified.
161 \a format is a case insensitive text string. For example:
163 \snippet code/src_gui_text_qtextdocumentwriter.cpp 0
165 You can call supportedDocumentFormats() for the full list of formats
166 QTextDocumentWriter supports.
170 void QTextDocumentWriter::setFormat (const QByteArray &format)
176 Returns the format used for writing documents.
180 QByteArray QTextDocumentWriter::format () const
186 Sets the writer's device to the \a device specified. If a device has
187 already been set, the old device is removed but otherwise left
190 If the device is not already open, QTextDocumentWriter will attempt to
191 open the device in \l QIODevice::WriteOnly mode by calling open().
193 \note This will not work for certain devices, such as QProcess,
194 QTcpSocket and QUdpSocket, where some configuration is required before
195 the device can be opened.
197 \sa device(), setFileName()
199 void QTextDocumentWriter::setDevice (QIODevice *device)
201 if (d->device && d->deleteDevice)
205 d->deleteDevice = false;
209 Returns the device currently assigned, or 0 if no device has been
212 QIODevice *QTextDocumentWriter::device () const
218 Sets the name of the file to be written to \a fileName. Internally,
219 QTextDocumentWriter will create a QFile and open it in \l
220 QIODevice::WriteOnly mode, and use this file when writing the document.
222 \sa fileName(), setDevice()
224 void QTextDocumentWriter::setFileName (const QString &fileName)
226 setDevice(new QFile(fileName));
227 d->deleteDevice = true;
231 If the currently assigned device is a QFile, or if setFileName()
232 has been called, this function returns the name of the file
233 to be written to. In all other cases, it returns an empty string.
235 \sa setFileName(), setDevice()
237 QString QTextDocumentWriter::fileName () const
239 QFile *file = qobject_cast<QFile *>(d->device);
240 return file ? file->fileName() : QString();
244 Writes the given \a document to the assigned device or file and
245 returns true if successful; otherwise returns false.
247 bool QTextDocumentWriter::write(const QTextDocument *document)
251 if (d->device && d->format.isEmpty()) {
252 // if there's no format, see if device is a file, and if so, find
254 if (QFile *file = qobject_cast<QFile *>(d->device))
255 suffix = QFileInfo(file->fileName()).suffix().toLower().toLatin1();
258 QByteArray format = !d->format.isEmpty() ? d->format.toLower() : suffix;
260 #ifndef QT_NO_TEXTODFWRITER
261 if (format == "odf" || format == "opendocumentformat" || format == "odt") {
262 QTextOdfWriter writer(*document, d->device);
263 #ifndef QT_NO_TEXTCODEC
264 writer.setCodec(d->codec);
266 return writer.writeAll();
268 #endif // QT_NO_TEXTODFWRITER
270 #ifndef QT_NO_TEXTHTMLPARSER
271 if (format == "html" || format == "htm") {
272 if (!d->device->isWritable() && ! d->device->open(QIODevice::WriteOnly)) {
273 qWarning() << "QTextDocumentWriter::write: the device can not be opened for writing";
276 QTextStream ts(d->device);
277 #ifndef QT_NO_TEXTCODEC
278 ts.setCodec(d->codec);
279 ts << document->toHtml(d->codec->name());
285 if (format == "txt" || format == "plaintext") {
286 if (!d->device->isWritable() && ! d->device->open(QIODevice::WriteOnly)) {
287 qWarning() << "QTextDocumentWriter::write: the device can not be opened for writing";
290 QTextStream ts(d->device);
291 #ifndef QT_NO_TEXTCODEC
292 ts.setCodec(d->codec);
294 ts << document->toPlainText();
303 Writes the document fragment specified by \a fragment to the assigned device
304 or file and returns true if successful; otherwise returns false.
306 bool QTextDocumentWriter::write(const QTextDocumentFragment &fragment)
309 return false; // invalid fragment.
310 QTextDocument *doc = fragment.d->doc;
317 Sets the codec for this stream to \a codec. The codec is used for
318 encoding any data that is written. By default, QTextDocumentWriter
322 #ifndef QT_NO_TEXTCODEC
323 void QTextDocumentWriter::setCodec(QTextCodec *codec)
326 codec = QTextCodec::codecForName("UTF-8");
333 Returns the codec that is currently assigned to the writer.
335 #ifndef QT_NO_TEXTCODEC
336 QTextCodec *QTextDocumentWriter::codec() const
343 Returns the list of document formats supported by QTextDocumentWriter.
345 By default, Qt can write the following formats:
348 \header \li Format \li Description
349 \row \li plaintext \li Plain text
350 \row \li HTML \li HyperText Markup Language
351 \row \li ODF \li OpenDocument Format
356 QList<QByteArray> QTextDocumentWriter::supportedDocumentFormats()
358 QList<QByteArray> answer;
359 answer << "plaintext";
361 #ifndef QT_NO_TEXTHTMLPARSER
364 #ifndef QT_NO_TEXTODFWRITER
366 #endif // QT_NO_TEXTODFWRITER