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/**************************************************************************
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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.
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
**************************************************************************/
#include "basetextdocument.h"
#include "basetexteditor.h"
#include "storagesettings.h"
#include <QtCore/QFile>
#include <QtCore/QFileInfo>
#include <QtCore/QTextStream>
#include <QtCore/QTextCodec>
#include <QtGui/QMainWindow>
#include <QtGui/QSyntaxHighlighter>
#include <QtGui/QApplication>
#ifndef TEXTEDITOR_STANDALONE
#include <utils/reloadpromptutils.h>
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using namespace TextEditor;
#if defined (Q_OS_WIN)
# define NATIVE_LINE_TERMINATOR CRLFLineTerminator
#else
# define NATIVE_LINE_TERMINATOR LFLineTerminator
#endif
DocumentMarker::DocumentMarker(QTextDocument *doc)
: ITextMarkable(doc), document(doc)
{
}
BaseTextDocument::BaseTextDocument()
: m_document(new QTextDocument(this)),
m_highlighter(0)
{
m_documentMarker = new DocumentMarker(m_document);
m_lineTerminatorMode = NativeLineTerminator;
m_isBinaryData = false;
m_codec = QTextCodec::codecForLocale();
m_hasDecodingError = false;
}
BaseTextDocument::~BaseTextDocument()
{
QTextBlock block = m_document->begin();
while (block.isValid()) {
if (TextBlockUserData *data = static_cast<TextBlockUserData *>(block.userData()))
data->documentClosing();
block = block.next();
}
delete m_document;
m_document = 0;
}
QString BaseTextDocument::mimeType() const
{
return m_mimeType;
}
void BaseTextDocument::setMimeType(const QString &mt)
{
m_mimeType = mt;
}
bool BaseTextDocument::save(const QString &fileName)
{
QTextCursor cursor(m_document);
cursor.beginEditBlock();
if (m_storageSettings.m_cleanWhitespace)
cleanWhitespace(cursor, m_storageSettings.m_inEntireDocument);
if (m_storageSettings.m_addFinalNewLine)
ensureFinalNewLine(cursor);
cursor.endEditBlock();
QString fName = m_fileName;
if (!fileName.isEmpty())
fName = fileName;
QFile file(fName);
if (!file.open(QIODevice::WriteOnly | QIODevice::Truncate))
return false;
QString plainText = m_document->toPlainText();
if (m_lineTerminatorMode == CRLFLineTerminator)
plainText.replace(QLatin1Char('\n'), QLatin1String("\r\n"));
file.write(m_codec->fromUnicode(plainText));
if (!file.flush())
return false;
file.close();
const QFileInfo fi(fName);
m_fileName = fi.absoluteFilePath();
m_document->setModified(false);
emit titleChanged(fi.fileName());
emit changed();
m_isBinaryData = false;
m_hasDecodingError = false;
m_decodingErrorSample.clear();
return true;
}
bool BaseTextDocument::isReadOnly() const
{
if (m_isBinaryData || m_hasDecodingError)
return true;
if (m_fileName.isEmpty()) //have no corresponding file, so editing is ok
return false;
const QFileInfo fi(m_fileName);
return !fi.isWritable();
}
bool BaseTextDocument::isModified() const
{
return m_document->isModified();
}
bool BaseTextDocument::open(const QString &fileName)
{
QString title = tr("untitled");
if (!fileName.isEmpty()) {
const QFileInfo fi(fileName);
m_fileName = fi.absoluteFilePath();
QFile file(fileName);
if (!file.exists())
return false;
if (!fi.isReadable())
return false;
if (!fi.isWritable()) {
if (!file.open(QIODevice::ReadOnly))
return false;
} else {
if (!file.open(QIODevice::ReadWrite))
return false;
}
title = fi.fileName();
QByteArray buf = file.readAll();
int bytesRead = buf.size();
QTextCodec *codec = m_codec;
// code taken from qtextstream
if (bytesRead >= 4 && ((uchar(buf[0]) == 0xff && uchar(buf[1]) == 0xfe && uchar(buf[2]) == 0 && uchar(buf[3]) == 0)
|| (uchar(buf[0]) == 0 && uchar(buf[1]) == 0 && uchar(buf[2]) == 0xfe && uchar(buf[3]) == 0xff))) {
codec = QTextCodec::codecForName("UTF-32");
} else if (bytesRead >= 2 && ((uchar(buf[0]) == 0xff && uchar(buf[1]) == 0xfe)
|| (uchar(buf[0]) == 0xfe && uchar(buf[1]) == 0xff))) {
codec = QTextCodec::codecForName("UTF-16");
} else if (!codec) {
codec = QTextCodec::codecForLocale();
}
// end code taken from qtextstream
m_codec = codec;
#if 0 // should work, but does not, Qt bug with "system" codec
QTextDecoder *decoder = m_codec->makeDecoder();
QString text = decoder->toUnicode(buf);
m_hasDecodingError = (decoder->hasFailure());
delete decoder;
#else
QString text = m_codec->toUnicode(buf);
QByteArray verifyBuf = m_codec->fromUnicode(text); // slow
// the minSize trick lets us ignore unicode headers
int minSize = qMin(verifyBuf.size(), buf.size());
m_hasDecodingError = (minSize < buf.size()- 4
|| memcmp(verifyBuf.constData() + verifyBuf.size() - minSize,
buf.constData() + buf.size() - minSize, minSize));
#endif
if (m_hasDecodingError) {
int p = buf.indexOf('\n', 16384);
if (p < 0)
m_decodingErrorSample = buf;
else
m_decodingErrorSample = buf.left(p);
} else {
m_decodingErrorSample.clear();
}
int lf = text.indexOf('\n');
if (lf > 0 && text.at(lf-1) == QLatin1Char('\r')) {
m_lineTerminatorMode = CRLFLineTerminator;
} else if (lf >= 0) {
m_lineTerminatorMode = LFLineTerminator;
} else {
m_lineTerminatorMode = NativeLineTerminator;
}
m_document->setModified(false);
m_document->setUndoRedoEnabled(false);
if (m_isBinaryData)
m_document->setHtml(tr("<em>Binary data</em>"));
else
m_document->setPlainText(text);
m_document->setUndoRedoEnabled(true);
TextEditDocumentLayout *documentLayout = qobject_cast<TextEditDocumentLayout*>(m_document->documentLayout());
documentLayout->lastSaveRevision = 0;
m_document->setModified(false);
emit titleChanged(title);
emit changed();
}
return true;
}
void BaseTextDocument::reload(QTextCodec *codec)
{
m_codec = codec;
reload();
}
void BaseTextDocument::reload()
{
emit aboutToReload();
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emit reloaded();
}
void BaseTextDocument::modified(Core::IFile::ReloadBehavior *behavior)
{
switch (*behavior) {
case Core::IFile::ReloadNone:
return;
case Core::IFile::ReloadAll:
reload();
return;
case Core::IFile::ReloadPermissions:
emit changed();
return;
case Core::IFile::AskForReload:
break;
}
#ifndef TEXTEDITOR_STANDALONE
switch (Core::Utils::reloadPrompt(m_fileName, QApplication::activeWindow())) {
case Core::Utils::ReloadCurrent:
reload();
break;
case Core::Utils::ReloadAll:
reload();
*behavior = Core::IFile::ReloadAll;
break;
case Core::Utils::ReloadSkipCurrent:
break;
case Core::Utils::ReloadNone:
*behavior = Core::IFile::ReloadNone;
break;
}
#endif
}
void BaseTextDocument::setSyntaxHighlighter(QSyntaxHighlighter *highlighter)
{
if (m_highlighter)
delete m_highlighter;
m_highlighter = highlighter;
m_highlighter->setParent(this);
m_highlighter->setDocument(m_document);
}
void BaseTextDocument::cleanWhitespace()
{
QTextCursor cursor(m_document);
cursor.beginEditBlock();
cleanWhitespace(cursor, true);
if (m_storageSettings.m_addFinalNewLine)
ensureFinalNewLine(cursor);
cursor.endEditBlock();
}
void BaseTextDocument::cleanWhitespace(QTextCursor& cursor, bool inEntireDocument)
{
TextEditDocumentLayout *documentLayout = qobject_cast<TextEditDocumentLayout*>(m_document->documentLayout());
QTextBlock block = m_document->firstBlock();
while (block.isValid()) {
if (inEntireDocument || block.revision() > documentLayout->lastSaveRevision) {
QString blockText = block.text();
if (int trailing = m_tabSettings.trailingWhitespaces(blockText)) {
cursor.setPosition(block.position() + block.length() - 1);
cursor.movePosition(QTextCursor::PreviousCharacter, QTextCursor::KeepAnchor, trailing);
cursor.removeSelectedText();
}
if (m_storageSettings.m_cleanIndentation && !m_tabSettings.isIndentationClean(blockText)) {
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cursor.setPosition(block.position());
int firstNonSpace = m_tabSettings.firstNonSpace(blockText);
if (firstNonSpace == blockText.length()) {
cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
cursor.removeSelectedText();
} else {
int column = m_tabSettings.columnAt(blockText, firstNonSpace);
cursor.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor, firstNonSpace);
QString indentationString = m_tabSettings.indentationString(0, column);
cursor.insertText(indentationString);
}
}
}
block = block.next();
}
}
void BaseTextDocument::ensureFinalNewLine(QTextCursor& cursor)
{
cursor.movePosition(QTextCursor::End, QTextCursor::MoveAnchor);
bool emptyFile = !cursor.movePosition(QTextCursor::PreviousCharacter, QTextCursor::KeepAnchor);
if (!emptyFile && cursor.selectedText().at(0) != QChar::ParagraphSeparator)
{
cursor.movePosition(QTextCursor::End, QTextCursor::MoveAnchor);
cursor.insertText(QLatin1String("\n"));
}
}