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349
src/plugins/texteditor/basetextdocument.cpp
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349
src/plugins/texteditor/basetextdocument.cpp
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/***************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Qt Software Information (qt-info@nokia.com)
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**
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**
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** Non-Open Source Usage
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**
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** Licensees may use this file in accordance with the Qt Beta Version
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** License Agreement, Agreement version 2.2 provided with the Software or,
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** alternatively, in accordance with the terms contained in a written
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** agreement between you and Nokia.
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**
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** GNU General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the packaging
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** of this file. Please review the following information to ensure GNU
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** General Public Licensing requirements will be met:
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**
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** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt GPL Exception version
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** 1.2, included in the file GPL_EXCEPTION.txt in this package.
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**
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***************************************************************************/
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#include "basetextdocument.h"
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#include "basetexteditor.h"
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#include "storagesettings.h"
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#include <QtCore/QFile>
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#include <QtCore/QFileInfo>
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#include <QtCore/QTextStream>
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#include <QtCore/QTextCodec>
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#include <QtGui/QMainWindow>
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#include <QtGui/QSyntaxHighlighter>
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#include <QtGui/QApplication>
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#ifndef TEXTEDITOR_STANDALONE
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#include <utils/reloadpromptutils.h>
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#include "coreplugin/icore.h"
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#endif
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using namespace TextEditor;
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#if defined (Q_OS_WIN)
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# define NATIVE_LINE_TERMINATOR CRLFLineTerminator
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#else
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# define NATIVE_LINE_TERMINATOR LFLineTerminator
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#endif
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DocumentMarker::DocumentMarker(QTextDocument *doc)
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: ITextMarkable(doc), document(doc)
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{
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}
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BaseTextDocument::BaseTextDocument()
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: m_document(new QTextDocument(this)),
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m_highlighter(0)
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{
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m_documentMarker = new DocumentMarker(m_document);
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m_lineTerminatorMode = NativeLineTerminator;
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m_isBinaryData = false;
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m_codec = QTextCodec::codecForLocale();
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m_hasDecodingError = false;
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}
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BaseTextDocument::~BaseTextDocument()
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{
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QTextBlock block = m_document->begin();
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while (block.isValid()) {
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if (TextBlockUserData *data = static_cast<TextBlockUserData *>(block.userData()))
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data->documentClosing();
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block = block.next();
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}
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delete m_document;
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m_document = 0;
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}
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QString BaseTextDocument::mimeType() const
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{
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return m_mimeType;
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}
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void BaseTextDocument::setMimeType(const QString &mt)
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{
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m_mimeType = mt;
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}
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bool BaseTextDocument::save(const QString &fileName)
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{
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QTextCursor cursor(m_document);
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cursor.beginEditBlock();
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if (m_storageSettings.m_cleanWhitespace)
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cleanWhitespace(cursor, m_storageSettings.m_inEntireDocument);
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if (m_storageSettings.m_addFinalNewLine)
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ensureFinalNewLine(cursor);
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cursor.endEditBlock();
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QString fName = m_fileName;
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if (!fileName.isEmpty())
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fName = fileName;
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QFile file(fName);
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if (!file.open(QIODevice::WriteOnly | QIODevice::Truncate))
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return false;
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QString plainText = m_document->toPlainText();
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if (m_lineTerminatorMode == CRLFLineTerminator)
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plainText.replace(QLatin1Char('\n'), QLatin1String("\r\n"));
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file.write(m_codec->fromUnicode(plainText));
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if (!file.flush())
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return false;
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file.close();
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const QFileInfo fi(fName);
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m_fileName = fi.absoluteFilePath();
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m_document->setModified(false);
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emit titleChanged(fi.fileName());
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emit changed();
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m_isBinaryData = false;
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m_hasDecodingError = false;
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m_decodingErrorSample.clear();
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return true;
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}
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bool BaseTextDocument::isReadOnly() const
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{
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if (m_isBinaryData || m_hasDecodingError)
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return true;
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if (m_fileName.isEmpty()) //have no corresponding file, so editing is ok
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return false;
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const QFileInfo fi(m_fileName);
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return !fi.isWritable();
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}
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bool BaseTextDocument::isModified() const
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{
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return m_document->isModified();
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}
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bool BaseTextDocument::open(const QString &fileName)
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{
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QString title = tr("untitled");
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if (!fileName.isEmpty()) {
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const QFileInfo fi(fileName);
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m_fileName = fi.absoluteFilePath();
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QFile file(fileName);
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if (!file.exists())
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return false;
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if (!fi.isReadable())
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return false;
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if (!fi.isWritable()) {
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if (!file.open(QIODevice::ReadOnly))
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return false;
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} else {
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if (!file.open(QIODevice::ReadWrite))
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return false;
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}
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title = fi.fileName();
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QByteArray buf = file.readAll();
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int bytesRead = buf.size();
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QTextCodec *codec = m_codec;
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// code taken from qtextstream
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if (bytesRead >= 4 && ((uchar(buf[0]) == 0xff && uchar(buf[1]) == 0xfe && uchar(buf[2]) == 0 && uchar(buf[3]) == 0)
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|| (uchar(buf[0]) == 0 && uchar(buf[1]) == 0 && uchar(buf[2]) == 0xfe && uchar(buf[3]) == 0xff))) {
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codec = QTextCodec::codecForName("UTF-32");
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} else if (bytesRead >= 2 && ((uchar(buf[0]) == 0xff && uchar(buf[1]) == 0xfe)
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|| (uchar(buf[0]) == 0xfe && uchar(buf[1]) == 0xff))) {
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codec = QTextCodec::codecForName("UTF-16");
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} else if (!codec) {
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codec = QTextCodec::codecForLocale();
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}
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// end code taken from qtextstream
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m_codec = codec;
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#if 0 // should work, but does not, Qt bug with "system" codec
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QTextDecoder *decoder = m_codec->makeDecoder();
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QString text = decoder->toUnicode(buf);
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m_hasDecodingError = (decoder->hasFailure());
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delete decoder;
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#else
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QString text = m_codec->toUnicode(buf);
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QByteArray verifyBuf = m_codec->fromUnicode(text); // slow
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// the minSize trick lets us ignore unicode headers
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int minSize = qMin(verifyBuf.size(), buf.size());
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m_hasDecodingError = (minSize < buf.size()- 4
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|| memcmp(verifyBuf.constData() + verifyBuf.size() - minSize,
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buf.constData() + buf.size() - minSize, minSize));
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#endif
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if (m_hasDecodingError) {
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int p = buf.indexOf('\n', 16384);
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if (p < 0)
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m_decodingErrorSample = buf;
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else
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m_decodingErrorSample = buf.left(p);
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} else {
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m_decodingErrorSample.clear();
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}
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int lf = text.indexOf('\n');
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if (lf > 0 && text.at(lf-1) == QLatin1Char('\r')) {
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m_lineTerminatorMode = CRLFLineTerminator;
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} else if (lf >= 0) {
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m_lineTerminatorMode = LFLineTerminator;
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} else {
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m_lineTerminatorMode = NativeLineTerminator;
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}
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m_document->setModified(false);
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m_document->setUndoRedoEnabled(false);
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if (m_isBinaryData)
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m_document->setHtml(tr("<em>Binary data</em>"));
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else
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m_document->setPlainText(text);
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m_document->setUndoRedoEnabled(true);
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TextEditDocumentLayout *documentLayout = qobject_cast<TextEditDocumentLayout*>(m_document->documentLayout());
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Q_ASSERT(documentLayout);
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documentLayout->lastSaveRevision = 0;
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m_document->setModified(false);
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emit titleChanged(title);
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emit changed();
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}
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return true;
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}
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void BaseTextDocument::reload(QTextCodec *codec)
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{
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Q_ASSERT(codec);
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m_codec = codec;
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reload();
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}
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void BaseTextDocument::reload()
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{
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emit aboutToReload();
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if (open(m_fileName)) {
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emit reloaded();
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}
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}
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void BaseTextDocument::modified(Core::IFile::ReloadBehavior *behavior)
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{
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switch (*behavior) {
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case Core::IFile::ReloadNone:
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return;
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case Core::IFile::ReloadAll:
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reload();
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return;
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case Core::IFile::ReloadPermissions:
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emit changed();
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return;
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case Core::IFile::AskForReload:
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break;
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}
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#ifndef TEXTEDITOR_STANDALONE
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switch (Core::Utils::reloadPrompt(m_fileName, QApplication::activeWindow())) {
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case Core::Utils::ReloadCurrent:
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reload();
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break;
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case Core::Utils::ReloadAll:
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reload();
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*behavior = Core::IFile::ReloadAll;
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break;
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case Core::Utils::ReloadSkipCurrent:
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break;
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case Core::Utils::ReloadNone:
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*behavior = Core::IFile::ReloadNone;
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break;
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}
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#endif
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}
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void BaseTextDocument::setSyntaxHighlighter(QSyntaxHighlighter *highlighter)
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{
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if (m_highlighter)
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delete m_highlighter;
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m_highlighter = highlighter;
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m_highlighter->setParent(this);
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m_highlighter->setDocument(m_document);
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}
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void BaseTextDocument::cleanWhitespace(QTextCursor& cursor, bool inEntireDocument)
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{
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TextEditDocumentLayout *documentLayout = qobject_cast<TextEditDocumentLayout*>(m_document->documentLayout());
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QTextBlock block = m_document->firstBlock();
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while (block.isValid()) {
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if (inEntireDocument || block.revision() > documentLayout->lastSaveRevision) {
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QString blockText = block.text();
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if (int trailing = m_tabSettings.trailingWhitespaces(blockText)) {
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cursor.setPosition(block.position() + block.length() - 1);
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cursor.movePosition(QTextCursor::PreviousCharacter, QTextCursor::KeepAnchor, trailing);
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cursor.removeSelectedText();
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}
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if (!m_tabSettings.isIndentationClean(blockText)) {
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cursor.setPosition(block.position());
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int firstNonSpace = m_tabSettings.firstNonSpace(blockText);
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if (firstNonSpace == blockText.length()) {
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cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
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cursor.removeSelectedText();
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} else {
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int column = m_tabSettings.columnAt(blockText, firstNonSpace);
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cursor.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor, firstNonSpace);
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QString indentationString = m_tabSettings.indentationString(0, column);
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cursor.insertText(indentationString);
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}
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}
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}
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block = block.next();
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}
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}
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void BaseTextDocument::ensureFinalNewLine(QTextCursor& cursor)
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{
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cursor.movePosition(QTextCursor::End, QTextCursor::MoveAnchor);
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bool emptyFile = !cursor.movePosition(QTextCursor::PreviousCharacter, QTextCursor::KeepAnchor);
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if (!emptyFile && cursor.selectedText().at(0) != QChar::ParagraphSeparator)
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{
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cursor.movePosition(QTextCursor::End, QTextCursor::MoveAnchor);
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cursor.insertText(QLatin1String("\n"));
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}
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}
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