в 14:21, 25 мая 2010

2010-05-25T14:21:06Z

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2010-05-25T10:25:07Z

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==Pretty print XML==

<source lang="cpp">
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** 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 have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QCoreApplication>
#include <QFile>
#include <QHash>
#include <QPair>
#include <QStringList>
#include <QTextStream>
#include <QXmlStreamReader>
/*
This class exists for the sole purpose of creating a translation context.
*/
class PrettyPrint
{
Q_DECLARE_TR_FUNCTIONS(PrettyPrint)
};
int main(int argc, char *argv[])
{
enum ExitCode
{
Success,
ParseFailure,
ArgumentError,
WriteError,
FileFailure
};
QCoreApplication app(argc, argv);
QTextStream errorStream(stderr);
if (argc != 2)
{
errorStream << PrettyPrint::tr(
"Usage: prettyprint <path to XML file>\n");
return ArgumentError;
}
QString inputFilePath(QCoreApplication::arguments().at(1));
QFile inputFile(inputFilePath);
if (!QFile::exists(inputFilePath))
{
errorStream << PrettyPrint::tr(
"File %1 does not exist.\n").arg(inputFilePath);
return FileFailure;
} else if (!inputFile.open(QIODevice::ReadOnly)) {
errorStream << PrettyPrint::tr(
"Failed to open file %1.\n").arg(inputFilePath);
return FileFailure;
}
QFile outputFile;
if (!outputFile.open(stdout, QIODevice::WriteOnly))
{
QTextStream(stderr) << PrettyPrint::tr("Failed to open stdout.");
return WriteError;
}
QXmlStreamReader reader(&inputFile);
int indentation = 0;
QHash<int,QPair<int, int> > indentationStack;
while (!reader.atEnd())
{
reader.readNext();
if (reader.isStartElement()) {
indentationStack[indentation] = QPair<int,int>(
reader.lineNumber(), reader.columnNumber());
indentation += 1;
} else if (reader.isEndElement()) {
indentationStack.remove(indentation);
indentation -= 1;
}
if (reader.error())
{
errorStream << PrettyPrint::tr(
"Error: %1 in file %2 at line %3, column %4.\n").arg(
reader.errorString(), inputFilePath,
QString::number(reader.lineNumber()),
QString::number(reader.columnNumber()));
if (indentationStack.contains(indentation-1)) {
int line = indentationStack[indentation-1].first;
int column = indentationStack[indentation-1].second;
errorStream << PrettyPrint::tr(
"Opened at line %1, column %2.\n").arg(
QString::number(line),
QString::number(column));
}
return ParseFailure;
} else if (reader.isStartElement() && !reader.name().isEmpty()) {
outputFile.write(QByteArray().fill(" ", indentation));
outputFile.write(reader.name().toString().toLocal8Bit());
outputFile.write(QString(" line %1, column %2\n").arg(
reader.lineNumber()).arg(reader.columnNumber()).toLocal8Bit());
}
}
return Success;
}

</source>

==Using QXmlStreamWriter==

<source lang="cpp">
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** 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 have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QCoreApplication>
#include <QFile>
#include <QXmlStreamWriter>
#include <stdio.h>
int main(int argc, char *argv[])
{
QCoreApplication app(argc, argv);
QFile output;
output.open(stdout, QIODevice::WriteOnly);
//! [write output]
//! [start stream]
QXmlStreamWriter stream(&output);
stream.setAutoFormatting(true);
stream.writeStartDocument();
//! [start stream]
stream.writeDTD("<!DOCTYPE xbel>");
stream.writeStartElement("xbel");
stream.writeAttribute("version", "1.0");
stream.writeStartElement("folder");
stream.writeAttribute("folded", "no");
//! [write element]
stream.writeStartElement("bookmark");
stream.writeAttribute("href", "http://qt.nokia.com/");
stream.writeTextElement("title", "Qt Home");
stream.writeEndElement(); // bookmark
//! [write element]
stream.writeEndElement(); // folder
stream.writeEndElement(); // xbel
//! [finish stream]
stream.writeEndDocument();
//! [finish stream]
//! [write output]
output.close();
return 0;
}

</source>

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