documenthandler.cpp Example File

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 #include "documenthandler.h"

 #include <QtGui/QTextDocument>
 #include <QtGui/QTextCursor>
 #include <QtGui/QFontDatabase>
 #include <QtCore/QFileInfo>

 DocumentHandler::DocumentHandler()
     : m_target(0)
     , m_doc(0)
     , m_cursorPosition(-1)
     , m_selectionStart(0)
     , m_selectionEnd(0)
 {
 }

 void DocumentHandler::setTarget(QQuickItem *target)
 {
     m_doc = 0;
     m_target = target;
     if (!m_target)
         return;

     QVariant doc = m_target->property("textDocument");
     if (doc.canConvert<QQuickTextDocument*>()) {
         QQuickTextDocument *qqdoc = doc.value<QQuickTextDocument*>();
         if (qqdoc)
             m_doc = qqdoc->textDocument();
     }
     emit targetChanged();
 }

 void DocumentHandler::setFileUrl(const QUrl &arg)
 {
     if (m_fileUrl != arg) {
         m_fileUrl = arg;
         QString fileName = QQmlFile::urlToLocalFileOrQrc(arg);
         if (QFile::exists(fileName)) {
             QFile file(fileName);
             if (file.open(QFile::ReadOnly)) {
                 QByteArray data = file.readAll();
                 QTextCodec *codec = QTextCodec::codecForHtml(data);
                 setText(codec->toUnicode(data));
                 if (m_doc)
                     m_doc->setModified(false);
                 if (fileName.isEmpty())
                     m_documentTitle = QStringLiteral("untitled.txt");
                 else
                     m_documentTitle = QFileInfo(fileName).fileName();

                 emit textChanged();
                 emit documentTitleChanged();

                 reset();
             }
         }
         emit fileUrlChanged();
     }
 }

 QString DocumentHandler::documentTitle() const
 {
     return m_documentTitle;
 }

 void DocumentHandler::setDocumentTitle(QString arg)
 {
     if (m_documentTitle != arg) {
         m_documentTitle = arg;
         emit documentTitleChanged();
     }
 }

 void DocumentHandler::setText(const QString &arg)
 {
     if (m_text != arg) {
         m_text = arg;
         emit textChanged();
     }
 }

 void DocumentHandler::saveAs(const QUrl &arg, const QString &fileType)
 {
     bool isHtml = fileType.contains(QLatin1String("htm"));
     QLatin1String ext(isHtml ? ".html" : ".txt");
     QString localPath = arg.toLocalFile();
     if (!localPath.endsWith(ext))
         localPath += ext;
     QFile f(localPath);
     if (!f.open(QFile::WriteOnly | QFile::Truncate | (isHtml ? QFile::NotOpen : QFile::Text))) {
         emit error(tr("Cannot save: ") + f.errorString());
         return;
     }
     f.write((isHtml ? m_doc->toHtml() : m_doc->toPlainText()).toLocal8Bit());
     f.close();
     setFileUrl(QUrl::fromLocalFile(localPath));
 }

 QUrl DocumentHandler::fileUrl() const
 {
     return m_fileUrl;
 }

 QString DocumentHandler::text() const
 {
     return m_text;
 }

 void DocumentHandler::setCursorPosition(int position)
 {
     if (position == m_cursorPosition)
         return;

     m_cursorPosition = position;

     reset();
 }

 void DocumentHandler::reset()
 {
     emit fontFamilyChanged();
     emit alignmentChanged();
     emit boldChanged();
     emit italicChanged();
     emit underlineChanged();
     emit fontSizeChanged();
     emit textColorChanged();
 }

 QTextCursor DocumentHandler::textCursor() const
 {
     if (!m_doc)
         return QTextCursor();

     QTextCursor cursor = QTextCursor(m_doc);
     if (m_selectionStart != m_selectionEnd) {
         cursor.setPosition(m_selectionStart);
         cursor.setPosition(m_selectionEnd, QTextCursor::KeepAnchor);
     } else {
         cursor.setPosition(m_cursorPosition);
     }
     return cursor;
 }

 void DocumentHandler::mergeFormatOnWordOrSelection(const QTextCharFormat &format)
 {
     QTextCursor cursor = textCursor();
     if (!cursor.hasSelection())
         cursor.select(QTextCursor::WordUnderCursor);
     cursor.mergeCharFormat(format);
 }

 void DocumentHandler::setSelectionStart(int position)
 {
     m_selectionStart = position;
 }

 void DocumentHandler::setSelectionEnd(int position)
 {
     m_selectionEnd = position;
 }

 void DocumentHandler::setAlignment(Qt::Alignment a)
 {
     if (!m_doc)
         return;

     QTextBlockFormat fmt;
     fmt.setAlignment((Qt::Alignment) a);
     QTextCursor cursor = QTextCursor(m_doc);
     cursor.setPosition(m_selectionStart, QTextCursor::MoveAnchor);
     cursor.setPosition(m_selectionEnd, QTextCursor::KeepAnchor);
     cursor.mergeBlockFormat(fmt);
     emit alignmentChanged();
 }

 Qt::Alignment DocumentHandler::alignment() const
 {
     QTextCursor cursor = textCursor();
     if (cursor.isNull())
         return Qt::AlignLeft;
     return textCursor().blockFormat().alignment();
 }

 bool DocumentHandler::bold() const
 {
     QTextCursor cursor = textCursor();
     if (cursor.isNull())
         return false;
     return textCursor().charFormat().fontWeight() == QFont::Bold;
 }

 bool DocumentHandler::italic() const
 {
     QTextCursor cursor = textCursor();
     if (cursor.isNull())
         return false;
     return textCursor().charFormat().fontItalic();
 }

 bool DocumentHandler::underline() const
 {
     QTextCursor cursor = textCursor();
     if (cursor.isNull())
         return false;
     return textCursor().charFormat().fontUnderline();
 }

 void DocumentHandler::setBold(bool arg)
 {
     QTextCharFormat fmt;
     fmt.setFontWeight(arg ? QFont::Bold : QFont::Normal);
     mergeFormatOnWordOrSelection(fmt);
     emit boldChanged();
 }

 void DocumentHandler::setItalic(bool arg)
 {
     QTextCharFormat fmt;
     fmt.setFontItalic(arg);
     mergeFormatOnWordOrSelection(fmt);
     emit italicChanged();
 }

 void DocumentHandler::setUnderline(bool arg)
 {
     QTextCharFormat fmt;
     fmt.setFontUnderline(arg);
     mergeFormatOnWordOrSelection(fmt);
     emit underlineChanged();
 }

 int DocumentHandler::fontSize() const
 {
     QTextCursor cursor = textCursor();
     if (cursor.isNull())
         return 0;
     QTextCharFormat format = cursor.charFormat();
     return format.font().pointSize();
 }

 void DocumentHandler::setFontSize(int arg)
 {
     QTextCursor cursor = textCursor();
     if (cursor.isNull())
         return;
     QTextCharFormat format;
     format.setFontPointSize(arg);
     mergeFormatOnWordOrSelection(format);
     emit fontSizeChanged();
 }

 QColor DocumentHandler::textColor() const
 {
     QTextCursor cursor = textCursor();
     if (cursor.isNull())
         return QColor(Qt::black);
     QTextCharFormat format = cursor.charFormat();
     return format.foreground().color();
 }

 void DocumentHandler::setTextColor(const QColor &c)
 {
     QTextCursor cursor = textCursor();
     if (cursor.isNull())
         return;
     QTextCharFormat format;
     format.setForeground(QBrush(c));
     mergeFormatOnWordOrSelection(format);
     emit textColorChanged();
 }

 QString DocumentHandler::fontFamily() const
 {
     QTextCursor cursor = textCursor();
     if (cursor.isNull())
         return QString();
     QTextCharFormat format = cursor.charFormat();
     return format.font().family();
 }

 void DocumentHandler::setFontFamily(const QString &arg)
 {
     QTextCursor cursor = textCursor();
     if (cursor.isNull())
         return;
     QTextCharFormat format;
     format.setFontFamily(arg);
     mergeFormatOnWordOrSelection(format);
     emit fontFamilyChanged();
 }

 QStringList DocumentHandler::defaultFontSizes() const
 {
     // uhm... this is quite ugly
     QStringList sizes;
     QFontDatabase db;
     foreach (int size, db.standardSizes())
         sizes.append(QString::number(size));
     return sizes;
 }