qt-creator/src/plugins/coreplugin/textdocument.cpp

/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/

#include "textdocument.h"
#include "editormanager.h"

#include <QDebug>
#include <QTextCodec>

/*!
    \class Core::TextFile
    \brief Base class for text files with encoding helpers.

    Stores the format obtained from read operations and uses that when writing
    out files, thus ensuring that CRLF/encodings are preserved.

    \sa Utils::TextFileUtils
*/

enum { debug = 0 };

namespace Core {

namespace Internal {
class TextDocumentPrivate
{
public:
    TextDocumentPrivate() : m_readResult(Utils::TextFileFormat::ReadSuccess) {}

    Utils::TextFileFormat m_format;
    Utils::TextFileFormat::ReadResult m_readResult;
    QByteArray m_decodingErrorSample;
};

} // namespace Internal

TextDocument::TextDocument(QObject *parent) :
    IDocument(parent), d(new Internal::TextDocumentPrivate)
{
    setCodec(Core::EditorManager::instance()->defaultTextCodec());
}

TextDocument::~TextDocument()
{
    delete d;
}

bool TextDocument::hasDecodingError() const
{
    return d->m_readResult == Utils::TextFileFormat::ReadEncodingError;
}

QByteArray TextDocument::decodingErrorSample() const
{
    return d->m_decodingErrorSample;
}

/*!
    \brief Writes out text using the format obtained from the last read.
*/

bool TextDocument::write(const QString &fileName, const QString &data, QString *errorMessage) const
{
    return write(fileName, format(), data, errorMessage);
}

/*!
    \brief Writes out text using a custom format obtained.
*/

bool TextDocument::write(const QString &fileName, const Utils::TextFileFormat &format, const QString &data, QString *errorMessage) const
{
    if (debug)
        qDebug() << Q_FUNC_INFO << this << fileName;
    return format.writeFile(fileName, data, errorMessage);
}

/*!
    \brief Autodetect format and read in a text file.
*/

TextDocument::ReadResult TextDocument::read(const QString &fileName, QStringList *plainTextList, QString *errorString)
{
    d->m_readResult =
        Utils::TextFileFormat::readFile(fileName, codec(),
                                        plainTextList, &d->m_format, errorString, &d->m_decodingErrorSample);
    return d->m_readResult;
}

/*!
    \brief Autodetect format and read in a text file.
*/

TextDocument::ReadResult TextDocument::read(const QString &fileName, QString *plainText, QString *errorString)
{
    d->m_readResult =
        Utils::TextFileFormat::readFile(fileName, codec(),
                                        plainText, &d->m_format, errorString, &d->m_decodingErrorSample);
    return d->m_readResult;
}

const QTextCodec *TextDocument::codec() const
{
    return d->m_format.codec;
}

void TextDocument::setCodec(const QTextCodec *codec)
{
    if (debug)
        qDebug() << Q_FUNC_INFO << this << (codec ? codec->name() : QByteArray());
    d->m_format.codec = codec;
}

void TextDocument::switchUtf8Bom()
{
    if (debug)
        qDebug() << Q_FUNC_INFO << this << "UTF-8 BOM: " << !d->m_format.hasUtf8Bom;
    d->m_format.hasUtf8Bom = !d->m_format.hasUtf8Bom;
}

/*!
    \brief Returns the format obtained from the last call to read().
*/

Utils::TextFileFormat TextDocument::format() const
{
    return d->m_format;
}

} // namespace Core