initial upload

iconos.qrc

@@ -0,0 +1,17 @@
+<RCC>
+    <qresource prefix="/">
+        <file>images/insertimage.png</file>
+        <file>images/simplifyrichtext.png</file>
+        <file>images/textanchor.png</file>
+        <file>images/textbold.png</file>
+        <file>images/textcenter.png</file>
+        <file>images/textitalic.png</file>
+        <file>images/textjustify.png</file>
+        <file>images/textleft.png</file>
+        <file>images/textright.png</file>
+        <file>images/textsubscript.png</file>
+        <file>images/textsuperscript.png</file>
+        <file>images/textunder.png</file>
+        <file>images/righttoleft.png</file>
+    </qresource>
+</RCC>

include/addlinkdialog.h

@@ -0,0 +1,27 @@
+#ifndef ADDLINKDIALOG_H
+#define ADDLINKDIALOG_H
+
+#include "ui_addlinkdialog.h"
+#include "richtexteditor.h"
+
+#include <QDialog>
+
+class AddLinkDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    AddLinkDialog(RichTextEditor *editor, QWidget *parent = nullptr);
+    ~AddLinkDialog() override;
+
+    int showDialog();
+
+public Q_SLOTS:
+    void accept() override;
+
+private:
+    RichTextEditor *m_editor;
+    QT_PREPEND_NAMESPACE(Ui)::AddLinkDialog *m_ui;
+};
+
+#endif // ADDLINKDIALOG_H

include/coloraction.h

@@ -0,0 +1,26 @@
+#ifndef COLORACTION_H
+#define COLORACTION_H
+
+#include <QAction>
+#include <QColor>
+
+class ColorAction : public QAction
+{
+    Q_OBJECT
+
+public:
+    ColorAction(QObject *parent);
+
+    const QColor& color() const { return m_color; }
+    void setColor(const QColor &color);
+
+Q_SIGNALS:
+    void colorChanged(const QColor &color);
+
+private Q_SLOTS:
+    void chooseColor();
+
+private:
+    QColor m_color;
+};
+#endif // COLORACTION_H

include/htmlhighlighter.h

@@ -0,0 +1,43 @@
+#ifndef HTMLHIGHLIGHTER_H
+#define HTMLHIGHLIGHTER_H
+
+#include <QSyntaxHighlighter>
+#include <QTextCharFormat>
+#include <QTextEdit>
+
+/* HTML syntax highlighter based on Qt Quarterly example */
+class HtmlHighlighter : public QSyntaxHighlighter
+{
+    Q_OBJECT
+
+public:
+    enum Construct {
+        Entity,
+        Tag,
+        Comment,
+        Attribute,
+        Value,
+        LastConstruct = Value
+    };
+
+    HtmlHighlighter(QTextEdit *textEdit);
+
+    void setFormatFor(Construct construct, const QTextCharFormat &format);
+
+    QTextCharFormat formatFor(Construct construct) const
+    { return m_formats[construct]; }
+
+protected:
+    enum State {
+        NormalState = -1,
+        InComment,
+        InTag
+    };
+
+    void highlightBlock(const QString &text) override;
+
+private:
+    QTextCharFormat m_formats[LastConstruct + 1];
+};
+
+#endif // HTMLHIGHLIGHTER_H

include/htmltextedit.h

@@ -0,0 +1,23 @@
+#ifndef HTMLTEXTEDIT_H
+#define HTMLTEXTEDIT_H
+
+#include <QTextEdit>
+#include <QAction>
+#include <QContextMenuEvent>
+
+class HtmlTextEdit : public QTextEdit
+{
+    Q_OBJECT
+
+public:
+    HtmlTextEdit(QWidget *parent = nullptr)
+        : QTextEdit(parent)
+    {}
+
+    void contextMenuEvent(QContextMenuEvent *event) override;
+
+private slots:
+    void actionTriggered(QAction *action);
+};
+
+#endif // HTMLTEXTEDIT_H

include/richtexteditor.h

@@ -0,0 +1,34 @@
+#ifndef RICHTEXTEDITOR_H
+#define RICHTEXTEDITOR_H
+
+#include <QTextEdit>
+#include <QToolBar>
+
+class RichTextEditor : public QTextEdit
+{
+    Q_OBJECT
+public:
+    explicit RichTextEditor(QWidget *parent = nullptr);
+    void setDefaultFont(QFont font);
+
+    QToolBar *createToolBar(QWidget *parent = nullptr);
+
+    QString text(Qt::TextFormat format) const;
+
+    bool simplifyRichText() const      { return m_simplifyRichText; }
+
+public Q_SLOTS:
+    void setFontBold(bool b);
+    void setFontPointSize(double);
+    void setText(const QString &text);
+    void setSimplifyRichText(bool v);
+
+Q_SIGNALS:
+    void stateChanged();
+    void simplifyRichTextChanged(bool);
+
+private:
+    bool m_simplifyRichText;
+};
+
+#endif // RICHTEXTEDITOR_H

include/richtexteditordialog.h

@@ -0,0 +1,37 @@
+#ifndef RICHTEXTEDITORDIALOG_H
+#define RICHTEXTEDITORDIALOG_H
+
+#include "richtexteditor.h"
+
+#include <QDialog>
+#include <QTextEdit>
+#include <QTabWidget>
+
+class RichTextEditorDialog : public QDialog
+{
+    Q_OBJECT
+public:
+    explicit RichTextEditorDialog(QWidget *parent = nullptr);
+    ~RichTextEditorDialog();
+
+    int showDialog();
+    void setDefaultFont(const QFont &font);
+    void setText(const QString &text);
+    QString text(Qt::TextFormat format = Qt::AutoText) const;
+
+private Q_SLOTS:
+    void tabIndexChanged(int newIndex);
+    void richTextChanged();
+    void sourceChanged();
+
+private:
+    enum TabIndex { RichTextIndex, SourceIndex };
+    enum State { Clean, RichTextChanged, SourceChanged };
+    RichTextEditor *m_editor;
+    QTextEdit      *m_text_edit;
+    QTabWidget     *m_tab_widget;
+    State m_state;
+    int m_initialTab;
+};
+
+#endif // RICHTEXTEDITORDIALOG_H

include/richtexteditortoolbar.h

@@ -0,0 +1,57 @@
+#ifndef RICHTEXTEDITORTOOLBAR_H
+#define RICHTEXTEDITORTOOLBAR_H
+
+#include "richtexteditor.h"
+#include "coloraction.h"
+
+#include <QToolBar>
+#include <QComboBox>
+#include <QFontComboBox>
+#include <QPointer>
+#include <QAction>
+
+QIcon createIconSet(const QString &name);
+
+class RichTextEditorToolBar : public QToolBar
+{
+    Q_OBJECT
+public:
+    RichTextEditorToolBar(RichTextEditor *editor,
+                          QWidget *parent = nullptr);
+
+public Q_SLOTS:
+    void updateActions();
+
+private Q_SLOTS:
+    void alignmentActionTriggered(QAction *action);
+    void sizeInputActivated(const QString &size);
+    void fontFamilyActivated(const QString &font);
+    void colorChanged(const QColor &color);
+    void setVAlignSuper(bool super);
+    void setVAlignSub(bool sub);
+    void insertLink();
+    void insertImage();
+    void layoutDirectionChanged();
+
+private:
+    QAction *m_bold_action;
+    QAction *m_italic_action;
+    QAction *m_underline_action;
+    QAction *m_valign_sup_action;
+    QAction *m_valign_sub_action;
+    QAction *m_align_left_action;
+    QAction *m_align_center_action;
+    QAction *m_align_right_action;
+    QAction *m_align_justify_action;
+    QAction *m_layoutDirectionAction;
+    QAction *m_link_action;
+    QAction *m_image_action;
+    QAction *m_simplify_richtext_action;
+    ColorAction *m_color_action;
+    QComboBox *m_font_size_input;
+    QFontComboBox *m_font_family_input;
+
+    QPointer<RichTextEditor> m_editor;
+};
+
+#endif // RICHTEXTEDITORTOOLBAR_H

src/addlinkdialog.cpp

@@ -0,0 +1,45 @@
+#include "addlinkdialog.h"
+
+AddLinkDialog::AddLinkDialog(RichTextEditor *editor, QWidget *parent) :
+    QDialog(parent),
+    m_ui(new QT_PREPEND_NAMESPACE(Ui)::AddLinkDialog)
+{
+    m_ui->setupUi(this);
+
+    m_editor = editor;
+}
+
+AddLinkDialog::~AddLinkDialog()
+{
+    delete m_ui;
+}
+
+int AddLinkDialog::showDialog()
+{
+    // Set initial focus
+    const QTextCursor cursor = m_editor->textCursor();
+    if (cursor.hasSelection()) {
+        m_ui->titleInput->setText(cursor.selectedText());
+        m_ui->urlInput->setFocus();
+    } else {
+        m_ui->titleInput->setFocus();
+    }
+
+    return exec();
+}
+
+void AddLinkDialog::accept()
+{
+    const QString title = m_ui->titleInput->text();
+    const QString url = m_ui->urlInput->text();
+
+    if (!title.isEmpty()) {
+        const QString html = "<a href=\"" + url + "\">" + title + "</a>";
+        m_editor->insertHtml(html);
+    }
+
+    m_ui->titleInput->clear();
+    m_ui->urlInput->clear();
+
+    QDialog::accept();
+}

src/coloraction.cpp

@@ -0,0 +1,36 @@
+#include "coloraction.h"
+
+#include <QPainter>
+#include <QPixmap>
+#include <QColorDialog>
+
+ColorAction::ColorAction(QObject *parent):
+    QAction(parent)
+{
+    setText(tr("Text Color"));
+    setColor(Qt::black);
+    connect(this, &QAction::triggered, this, &ColorAction::chooseColor);
+}
+
+void ColorAction::setColor(const QColor &color)
+{
+    if (color == m_color)
+        return;
+    m_color = color;
+    QPixmap pix(24, 24);
+    QPainter painter(&pix);
+    painter.setRenderHint(QPainter::Antialiasing, false);
+    painter.fillRect(pix.rect(), m_color);
+    painter.setPen(m_color.darker());
+    painter.drawRect(pix.rect().adjusted(0, 0, -1, -1));
+    setIcon(pix);
+}
+
+void ColorAction::chooseColor()
+{
+    const QColor col = QColorDialog::getColor(m_color, nullptr);
+    if (col.isValid() && col != m_color) {
+        setColor(col);
+        emit colorChanged(m_color);
+    }
+}

src/htmlhighlighter.cpp

@@ -0,0 +1,142 @@
+#include "htmlhighlighter.h"
+
+#include <QTextStream>
+
+using namespace Qt::StringLiterals;
+
+HtmlHighlighter::HtmlHighlighter(QTextEdit *textEdit)
+    : QSyntaxHighlighter(textEdit->document())
+{
+    QTextCharFormat entityFormat;
+    entityFormat.setForeground(Qt::red);
+    setFormatFor(Entity, entityFormat);
+
+    QTextCharFormat tagFormat;
+    tagFormat.setForeground(Qt::darkMagenta);
+    tagFormat.setFontWeight(QFont::Bold);
+    setFormatFor(Tag, tagFormat);
+
+    QTextCharFormat commentFormat;
+    commentFormat.setForeground(Qt::gray);
+    commentFormat.setFontItalic(true);
+    setFormatFor(Comment, commentFormat);
+
+    QTextCharFormat attributeFormat;
+    attributeFormat.setForeground(Qt::black);
+    attributeFormat.setFontWeight(QFont::Bold);
+    setFormatFor(Attribute, attributeFormat);
+
+    QTextCharFormat valueFormat;
+    valueFormat.setForeground(Qt::blue);
+    setFormatFor(Value, valueFormat);
+}
+
+void HtmlHighlighter::setFormatFor(Construct construct,
+                                   const QTextCharFormat &format)
+{
+    m_formats[construct] = format;
+    rehighlight();
+}
+
+void HtmlHighlighter::highlightBlock(const QString &text)
+{
+    static const QChar tab = u'\t';
+    static const QChar space = u' ';
+
+    int state = previousBlockState();
+    qsizetype len = text.size();
+    qsizetype start = 0;
+    qsizetype pos = 0;
+
+    while (pos < len) {
+        switch (state) {
+        case NormalState:
+        default:
+            while (pos < len) {
+                QChar ch = text.at(pos);
+                if (ch == u'<') {
+                    if (QStringView{text}.sliced(pos).startsWith("<!--"_L1)) {
+                        state = InComment;
+                    } else {
+                        state = InTag;
+                        start = pos;
+                        while (pos < len && text.at(pos) != space
+                               && text.at(pos) != u'>'
+                               && text.at(pos) != tab
+                               && !QStringView{text}.sliced(pos).startsWith("/>"_L1)) {
+                            ++pos;
+                        }
+                        if (QStringView{text}.sliced(pos).startsWith("/>"_L1))
+                            ++pos;
+                        setFormat(start, pos - start,
+                                  m_formats[Tag]);
+                        break;
+                    }
+                    break;
+                }
+                if (ch == u'&') {
+                    start = pos;
+                    while (pos < len && text.at(pos++) != u';')
+                        ;
+                    setFormat(start, pos - start,
+                              m_formats[Entity]);
+                } else {
+                    // No tag, comment or entity started, continue...
+                    ++pos;
+                }
+            }
+            break;
+        case InComment:
+            start = pos;
+            for ( ; pos < len; ++pos) {
+                if (QStringView{text}.sliced(pos).startsWith("-->"_L1)) {
+                    pos += 3;
+                    state = NormalState;
+                    break;
+                }
+            }
+            setFormat(start, pos - start, m_formats[Comment]);
+            break;
+        case InTag:
+            QChar quote = QChar::Null;
+            while (pos < len) {
+                QChar ch = text.at(pos);
+                if (quote.isNull()) {
+                    start = pos;
+                    if (ch == '\''_L1 || ch == u'"') {
+                        quote = ch;
+                    } else if (ch == u'>') {
+                        ++pos;
+                        setFormat(start, pos - start, m_formats[Tag]);
+                        state = NormalState;
+                        break;
+                    } else if (QStringView{text}.sliced(pos).startsWith("/>"_L1)) {
+                        pos += 2;
+                        setFormat(start, pos - start, m_formats[Tag]);
+                        state = NormalState;
+                        break;
+                    } else if (ch != space && text.at(pos) != tab) {
+                        // Tag not ending, not a quote and no whitespace, so
+                        // we must be dealing with an attribute.
+                        ++pos;
+                        while (pos < len && text.at(pos) != space
+                               && text.at(pos) != tab
+                               && text.at(pos) != u'=')
+                            ++pos;
+                        setFormat(start, pos - start, m_formats[Attribute]);
+                        start = pos;
+                    }
+                } else if (ch == quote) {
+                    quote = QChar::Null;
+
+                    // Anything quoted is a value
+                    setFormat(start, pos - start, m_formats[Value]);
+                }
+                ++pos;
+            }
+            break;
+        }
+    }
+    setCurrentBlockState(state);
+}
+

src/htmltextedit.cpp

@@ -0,0 +1,40 @@
+#include "htmltextedit.h"
+
+#include <QMenu>
+
+void HtmlTextEdit::contextMenuEvent(QContextMenuEvent *event)
+{
+    QMenu *menu = createStandardContextMenu();
+    QMenu *htmlMenu = new QMenu(tr("Insert HTML entity"), menu);
+
+    typedef struct {
+        const char *text;
+        const char *entity;
+    } Entry;
+
+    const Entry entries[] = {
+                             { "&&amp; (&&)", "&amp;" },
+                             { "&&nbsp;", "&nbsp;" },
+                             { "&&lt; (<)", "&lt;" },
+                             { "&&gt; (>)", "&gt;" },
+                             { "&&copy; (Copyright)", "&copy;" },
+                             { "&&reg; (Trade Mark)", "&reg;" },
+                             };
+
+    for (const Entry &e : entries) {
+        QAction *entityAction = new QAction(QLatin1StringView(e.text),
+                                            htmlMenu);
+        entityAction->setData(QLatin1StringView(e.entity));
+        htmlMenu->addAction(entityAction);
+    }
+
+    menu->addMenu(htmlMenu);
+    connect(htmlMenu, &QMenu::triggered, this, &HtmlTextEdit::actionTriggered);
+    menu->exec(event->globalPos());
+    delete menu;
+}
+
+void HtmlTextEdit::actionTriggered(QAction *action)
+{
+    insertPlainText(action->data().toString());
+}

src/richtexteditor.cpp

@@ -0,0 +1,179 @@
+#include "richtexteditor.h"
+#include "richtexteditortoolbar.h"
+
+#include <QXmlStreamReader>
+#include <QXmlStreamWriter>
+#include <QStringView>
+#include <QStringLiteral>
+
+#include <algorithm>
+
+const bool simplifyRichTextDefault = true;
+
+using namespace Qt::StringLiterals;
+
+// Richtext simplification filter helpers: Elements to be discarded
+static inline bool filterElement(QStringView name)
+{
+    return name != "meta"_L1 && name != "style"_L1;
+}
+
+// Richtext simplification filter helpers: Filter attributes of elements
+static inline void filterAttributes(QStringView name,
+                                    QXmlStreamAttributes *atts,
+                                    bool *paragraphAlignmentFound)
+{
+    if (atts->isEmpty())
+        return;
+
+    // No style attributes for <body>
+    if (name == "body"_L1) {
+        atts->clear();
+        return;
+    }
+
+    // Clean out everything except 'align' for 'p'
+    if (name == "p"_L1) {
+        for (auto it = atts->begin(); it != atts->end(); ) {
+            if (it->name() == "align"_L1) {
+                ++it;
+                *paragraphAlignmentFound = true;
+            } else {
+                it = atts->erase(it);
+            }
+        }
+        return;
+    }
+}
+
+// Richtext simplification filter helpers: Check for blank QStringView.
+static inline bool isWhiteSpace(QStringView in)
+{
+    return std::all_of(in.cbegin(), in.cend(),
+                       [](QChar c) { return c.isSpace(); });
+}
+
+// Richtext simplification filter: Remove hard-coded font settings,
+// <style> elements, <p> attributes other than 'align' and
+// and unnecessary meta-information.
+QString simplifyRichTextFilter(const QString &in, bool *isPlainTextPtr = nullptr)
+{
+    unsigned elementCount = 0;
+    bool paragraphAlignmentFound = false;
+    QString out;
+    QXmlStreamReader reader(in);
+    QXmlStreamWriter writer(&out);
+    writer.setAutoFormatting(false);
+    writer.setAutoFormattingIndent(0);
+
+    while (!reader.atEnd()) {
+        switch (reader.readNext()) {
+        case QXmlStreamReader::StartElement:
+            elementCount++;
+            if (filterElement(reader.name())) {
+                const auto name = reader.name();
+                QXmlStreamAttributes attributes = reader.attributes();
+                filterAttributes(name, &attributes, &paragraphAlignmentFound);
+                writer.writeStartElement(name.toString());
+                if (!attributes.isEmpty())
+                    writer.writeAttributes(attributes);
+            } else {
+                reader.readElementText(); // Skip away all nested elements and characters.
+            }
+            break;
+        case QXmlStreamReader::Characters:
+            if (!isWhiteSpace(reader.text()))
+                writer.writeCharacters(reader.text().toString());
+            break;
+        case QXmlStreamReader::EndElement:
+            writer.writeEndElement();
+            break;
+        default:
+            break;
+        }
+    }
+    // Check for plain text (no spans, just <html><head><body><p>)
+    if (isPlainTextPtr)
+        *isPlainTextPtr = !paragraphAlignmentFound && elementCount == 4u; //
+    return out;
+}
+
+RichTextEditor::RichTextEditor(QWidget *parent)
+    : QTextEdit(parent), m_simplifyRichText(simplifyRichTextDefault)
+{
+    connect(this, &RichTextEditor::currentCharFormatChanged,
+            this, &RichTextEditor::stateChanged);
+    connect(this, &RichTextEditor::cursorPositionChanged,
+            this, &RichTextEditor::stateChanged);
+}
+
+QToolBar *RichTextEditor::createToolBar(QWidget *parent)
+{
+    return new RichTextEditorToolBar(this, parent);
+}
+
+void RichTextEditor::setFontBold(bool b)
+{
+    if (b)
+        setFontWeight(QFont::Bold);
+    else
+        setFontWeight(QFont::Normal);
+}
+
+void RichTextEditor::setFontPointSize(double d)
+{
+    QTextEdit::setFontPointSize(qreal(d));
+}
+
+void RichTextEditor::setText(const QString &text)
+{
+
+    if (Qt::mightBeRichText(text))
+        setHtml(text);
+    else
+        setPlainText(text);
+}
+
+void RichTextEditor::setSimplifyRichText(bool v)
+{
+    if (v != m_simplifyRichText) {
+        m_simplifyRichText = v;
+        emit simplifyRichTextChanged(v);
+    }
+}
+
+void RichTextEditor::setDefaultFont(QFont font)
+{
+    // Some default fonts on Windows have a default size of 7.8,
+    // which results in complicated rich text generated by toHtml().
+    // Use an integer value.
+    const int pointSize = qRound(font.pointSizeF());
+    if (pointSize > 0 && !qFuzzyCompare(qreal(pointSize), font.pointSizeF())) {
+        font.setPointSize(pointSize);
+    }
+
+    document()->setDefaultFont(font);
+    if (font.pointSize() > 0)
+        setFontPointSize(font.pointSize());
+    else
+        setFontPointSize(QFontInfo(font).pointSize());
+    emit textChanged();
+}
+
+QString RichTextEditor::text(Qt::TextFormat format) const
+{
+    switch (format) {
+    case Qt::PlainText:
+        return toPlainText();
+    case Qt::RichText:
+        return m_simplifyRichText ? simplifyRichTextFilter(toHtml()) : toHtml();
+    default:
+        break;
+    }
+    const QString html = toHtml();
+    bool isPlainText;
+    const QString simplifiedHtml = simplifyRichTextFilter(html, &isPlainText);
+    if (isPlainText)
+        return toPlainText();
+    return m_simplifyRichText ? simplifiedHtml : html;
+}

src/richtexteditordialog.cpp

@@ -0,0 +1,143 @@
+#include "richtexteditordialog.h"
+#include "htmltextedit.h"
+#include "htmlhighlighter.h"
+
+#include <QVBoxLayout>
+#include <QToolBar>
+#include <QDialogButtonBox>
+#include <QPushButton>
+
+RichTextEditorDialog::RichTextEditorDialog(QWidget *parent)  :
+    QDialog(parent),
+    m_editor(new RichTextEditor()),
+    m_text_edit(new HtmlTextEdit),
+    m_tab_widget(new QTabWidget),
+    m_state(Clean),
+    m_initialTab(RichTextIndex)
+{
+    setWindowTitle(tr("Edit text"));
+
+    m_initialTab = RichTextIndex;
+
+    m_text_edit->setAcceptRichText(false);
+    new HtmlHighlighter(m_text_edit);
+
+    connect(m_editor, &QTextEdit::textChanged, this, &RichTextEditorDialog::richTextChanged);
+    connect(m_editor, &RichTextEditor::simplifyRichTextChanged,
+            this, &RichTextEditorDialog::richTextChanged);
+    connect(m_text_edit, &QTextEdit::textChanged, this, &RichTextEditorDialog::sourceChanged);
+
+    // The toolbar needs to be created after the RichTextEditor
+    QToolBar *tool_bar = m_editor->createToolBar(this);
+    tool_bar->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Minimum);
+
+    QWidget *rich_edit = new QWidget;
+    QVBoxLayout *rich_edit_layout = new QVBoxLayout(rich_edit);
+    rich_edit_layout->addWidget(tool_bar);
+    rich_edit_layout->addWidget(m_editor);
+
+    QWidget *plain_edit = new QWidget;
+    QVBoxLayout *plain_edit_layout = new QVBoxLayout(plain_edit);
+    plain_edit_layout->addWidget(m_text_edit);
+
+    m_tab_widget->setTabPosition(QTabWidget::South);
+    m_tab_widget->addTab(rich_edit, tr("Rich Text"));
+    m_tab_widget->addTab(plain_edit, tr("Source"));
+    connect(m_tab_widget, &QTabWidget::currentChanged,
+            this, &RichTextEditorDialog::tabIndexChanged);
+
+    QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel, Qt::Horizontal);
+    QPushButton *ok_button = buttonBox->button(QDialogButtonBox::Ok);
+    ok_button->setText(tr("&OK"));
+    ok_button->setDefault(true);
+    buttonBox->button(QDialogButtonBox::Cancel)->setText(tr("&Cancel"));
+    connect(buttonBox, &QDialogButtonBox::accepted, this, &QDialog::accept);
+    connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
+
+    QVBoxLayout *layout = new QVBoxLayout(this);
+    layout->addWidget(m_tab_widget);
+    layout->addWidget(buttonBox);
+}
+
+RichTextEditorDialog::~RichTextEditorDialog()
+{}
+
+int RichTextEditorDialog::showDialog()
+{
+    m_tab_widget->setCurrentIndex(m_initialTab);
+    switch (m_initialTab) {
+    case RichTextIndex:
+        m_editor->selectAll();
+        m_editor->setFocus();
+        break;
+    case SourceIndex:
+        m_text_edit->selectAll();
+        m_text_edit->setFocus();
+        break;
+    }
+    return exec();
+}
+
+void RichTextEditorDialog::setDefaultFont(const QFont &font)
+{
+    m_editor->setDefaultFont(font);
+}
+
+void RichTextEditorDialog::setText(const QString &text)
+{
+    // Generally simplify rich text unless verbose text is found.
+    const bool isSimplifiedRichText = !text.startsWith(QStringLiteral("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">"));
+    m_editor->setSimplifyRichText(isSimplifiedRichText);
+    m_editor->setText(text);
+    m_text_edit->setPlainText(text);
+    m_state = Clean;
+}
+
+QString RichTextEditorDialog::text(Qt::TextFormat format) const
+{
+    // In autotext mode, if the user has changed the source, use that
+    if (format == Qt::AutoText && (m_state == Clean || m_state == SourceChanged))
+        return m_text_edit->toPlainText();
+    // If the plain text HTML editor is selected, first copy its contents over
+    // to the rich text editor so that it is converted to Qt-HTML or actual
+    // plain text.
+    if (m_tab_widget->currentIndex() == SourceIndex && m_state == SourceChanged)
+        m_editor->setHtml(m_text_edit->toPlainText());
+    return m_editor->text(format);
+}
+
+void RichTextEditorDialog::tabIndexChanged(int newIndex)
+{
+    // Anything changed, is there a need for a conversion?
+    if (newIndex == SourceIndex && m_state != RichTextChanged)
+        return;
+    if (newIndex == RichTextIndex && m_state != SourceChanged)
+        return;
+    const State oldState = m_state;
+    // Remember the cursor position, since it is invalidated by setPlainText
+    QTextEdit *new_edit = (newIndex == SourceIndex) ? m_text_edit : m_editor;
+    const int position = new_edit->textCursor().position();
+
+    if (newIndex == SourceIndex)
+        m_text_edit->setPlainText(m_editor->text(Qt::RichText));
+    else
+        m_editor->setHtml(m_text_edit->toPlainText());
+
+    QTextCursor cursor = new_edit->textCursor();
+    cursor.movePosition(QTextCursor::End);
+    if (cursor.position() > position) {
+        cursor.setPosition(position);
+    }
+    new_edit->setTextCursor(cursor);
+    m_state = oldState; // Changed is triggered by setting the text
+}
+
+void RichTextEditorDialog::richTextChanged()
+{
+    m_state = RichTextChanged;
+}
+
+void RichTextEditorDialog::sourceChanged()
+{
+    m_state = SourceChanged;
+}

src/richtexteditortoolbar.cpp

@@ -0,0 +1,316 @@
+#include "richtexteditortoolbar.h"
+#include "addlinkdialog.h"
+
+#include <QFontDatabase>
+#include <QActionGroup>
+#include <QTextBlock>
+#include <QTextBlockFormat>
+#include <QTextCursor>
+#include <QFileDialog>
+#include <QFile>
+#include <QDir>
+
+using namespace Qt::StringLiterals;
+
+QIcon createIconSet(const QString &name)
+{
+    constexpr QLatin1StringView prefixes[] = {
+        ":/images/"_L1,
+    };
+
+    for (QLatin1StringView prefix : prefixes) {
+        const QString f = prefix + name;
+        if (QFile::exists(f))
+            return QIcon(f);
+    }
+
+    return QIcon();
+}
+
+static QAction *createCheckableAction(const QIcon &icon, const QString &text,
+                                      QObject *parent = nullptr)
+{
+    QAction *result = new QAction(parent);
+    result->setIcon(icon);
+    result->setText(text);
+    result->setCheckable(true);
+    result->setChecked(false);
+    return result;
+}
+
+RichTextEditorToolBar::RichTextEditorToolBar(RichTextEditor *editor,
+                                             QWidget *parent) :
+    QToolBar(parent),
+    m_link_action(new QAction(this)),
+    m_image_action(new QAction(this)),
+    m_color_action(new ColorAction(this)),
+    m_font_size_input(new QComboBox),
+    m_editor(editor)
+{
+    // Font comboBox
+    m_font_family_input = new QFontComboBox(this);
+    m_font_family_input->setEditable(false);
+    connect(m_font_family_input, &QComboBox::textActivated,
+            this, &RichTextEditorToolBar::fontFamilyActivated);
+    addWidget(m_font_family_input);
+
+    // Font size combo box
+    m_font_size_input->setEditable(false);
+    const auto font_sizes = QFontDatabase::standardSizes();
+    for (int font_size : font_sizes)
+        m_font_size_input->addItem(QString::number(font_size));
+
+    connect(m_font_size_input, &QComboBox::textActivated,
+            this, &RichTextEditorToolBar::sizeInputActivated);
+    addWidget(m_font_size_input);
+
+    addSeparator();
+
+    // Bold, italic and underline buttons
+
+    m_bold_action = createCheckableAction(
+        createIconSet(u"textbold.png"_s), tr("Bold"), this);
+    connect(m_bold_action, &QAction::triggered, editor, &RichTextEditor::setFontBold);
+    m_bold_action->setShortcut(tr("CTRL+B"));
+    addAction(m_bold_action);
+
+    m_italic_action = createCheckableAction(
+        createIconSet(u"textitalic.png"_s), tr("Italic"), this);
+    connect(m_italic_action, &QAction::triggered, editor, &RichTextEditor::setFontItalic);
+    m_italic_action->setShortcut(tr("CTRL+I"));
+    addAction(m_italic_action);
+
+    m_underline_action = createCheckableAction(
+        createIconSet(u"textunder.png"_s), tr("Underline"), this);
+    connect(m_underline_action, &QAction::triggered, editor, &RichTextEditor::setFontUnderline);
+    m_underline_action->setShortcut(tr("CTRL+U"));
+    addAction(m_underline_action);
+
+    addSeparator();
+
+    // Left, center, right and justified alignment buttons
+
+    QActionGroup *alignment_group = new QActionGroup(this);
+    connect(alignment_group, &QActionGroup::triggered,
+            this, &RichTextEditorToolBar::alignmentActionTriggered);
+
+    m_align_left_action = createCheckableAction(
+        createIconSet(u"textleft.png"_s), tr("Left Align"), alignment_group);
+    addAction(m_align_left_action);
+
+    m_align_center_action = createCheckableAction(
+        createIconSet(u"textcenter.png"_s), tr("Center"), alignment_group);
+    addAction(m_align_center_action);
+
+    m_align_right_action = createCheckableAction(
+        createIconSet(u"textright.png"_s), tr("Right Align"), alignment_group);
+    addAction(m_align_right_action);
+
+    m_align_justify_action = createCheckableAction(
+        createIconSet(u"textjustify.png"_s), tr("Justify"), alignment_group);
+    addAction(m_align_justify_action);
+
+    m_layoutDirectionAction = createCheckableAction(
+        createIconSet(u"righttoleft.png"_s), tr("Right to Left"));
+    connect(m_layoutDirectionAction, &QAction::triggered,
+            this, &RichTextEditorToolBar::layoutDirectionChanged);
+    addAction(m_layoutDirectionAction);
+
+    addSeparator();
+
+    // Superscript and subscript buttons
+
+    m_valign_sup_action = createCheckableAction(
+        createIconSet(u"textsuperscript.png"_s), tr("Superscript"), this);
+    connect(m_valign_sup_action, &QAction::triggered,
+            this, &RichTextEditorToolBar::setVAlignSuper);
+    addAction(m_valign_sup_action);
+
+    m_valign_sub_action = createCheckableAction(
+        createIconSet(u"textsubscript.png"_s), tr("Subscript"), this);
+    connect(m_valign_sub_action, &QAction::triggered,
+            this, &RichTextEditorToolBar::setVAlignSub);
+    addAction(m_valign_sub_action);
+
+    addSeparator();
+
+    // Insert hyperlink and image buttons
+
+    m_link_action->setIcon(createIconSet(u"textanchor.png"_s));
+    m_link_action->setText(tr("Insert &Link"));
+    connect(m_link_action, &QAction::triggered, this, &RichTextEditorToolBar::insertLink);
+    addAction(m_link_action);
+
+    m_image_action->setIcon(createIconSet(u"insertimage.png"_s));
+    m_image_action->setText(tr("Insert &Image"));
+    connect(m_image_action, &QAction::triggered, this, &RichTextEditorToolBar::insertImage);
+    addAction(m_image_action);
+
+    addSeparator();
+
+    // Text color button
+    connect(m_color_action, &ColorAction::colorChanged,
+            this, &RichTextEditorToolBar::colorChanged);
+    addAction(m_color_action);
+
+    addSeparator();
+
+    // Simplify rich text
+    m_simplify_richtext_action
+        = createCheckableAction(createIconSet(u"simplifyrichtext.png"_s), tr("Simplify Rich Text"));
+    connect(m_simplify_richtext_action, &QAction::triggered,
+            m_editor, &RichTextEditor::setSimplifyRichText);
+    m_simplify_richtext_action->setChecked(m_editor->simplifyRichText());
+    connect(m_editor.data(), &RichTextEditor::simplifyRichTextChanged,
+            m_simplify_richtext_action, &QAction::setChecked);
+    addAction(m_simplify_richtext_action);
+
+    connect(editor, &QTextEdit::textChanged, this, &RichTextEditorToolBar::updateActions);
+    connect(editor, &RichTextEditor::stateChanged, this, &RichTextEditorToolBar::updateActions);
+
+    updateActions();
+}
+
+void RichTextEditorToolBar::alignmentActionTriggered(QAction *action)
+{
+    Qt::Alignment new_alignment;
+
+    if (action == m_align_left_action) {
+        new_alignment = Qt::AlignLeft;
+    } else if (action == m_align_center_action) {
+        new_alignment = Qt::AlignCenter;
+    } else if (action == m_align_right_action) {
+        new_alignment = Qt::AlignRight;
+    } else {
+        new_alignment = Qt::AlignJustify;
+    }
+
+    m_editor->setAlignment(new_alignment);
+}
+
+void RichTextEditorToolBar::colorChanged(const QColor &color)
+{
+    m_editor->setTextColor(color);
+    m_editor->setFocus();
+}
+
+void RichTextEditorToolBar::sizeInputActivated(const QString &size)
+{
+    bool ok;
+    int i = size.toInt(&ok);
+    if (!ok)
+        return;
+
+    m_editor->setFontPointSize(i);
+    m_editor->setFocus();
+}
+
+void RichTextEditorToolBar::fontFamilyActivated(const QString &font)
+{
+    QTextCharFormat fmt;
+    fmt.setFontFamilies({font});
+    QTextCursor cursor = m_editor->textCursor();
+    if (!cursor.hasSelection())
+        cursor.select(QTextCursor::WordUnderCursor);
+    cursor.mergeCharFormat(fmt);
+    m_editor->mergeCurrentCharFormat(fmt);
+}
+
+void RichTextEditorToolBar::setVAlignSuper(bool super)
+{
+    const QTextCharFormat::VerticalAlignment align = super ?
+                                                         QTextCharFormat::AlignSuperScript : QTextCharFormat::AlignNormal;
+
+    QTextCharFormat charFormat = m_editor->currentCharFormat();
+    charFormat.setVerticalAlignment(align);
+    m_editor->setCurrentCharFormat(charFormat);
+
+    m_valign_sub_action->setChecked(false);
+}
+
+void RichTextEditorToolBar::setVAlignSub(bool sub)
+{
+    const QTextCharFormat::VerticalAlignment align = sub ?
+                                                         QTextCharFormat::AlignSubScript : QTextCharFormat::AlignNormal;
+
+    QTextCharFormat charFormat = m_editor->currentCharFormat();
+    charFormat.setVerticalAlignment(align);
+    m_editor->setCurrentCharFormat(charFormat);
+
+    m_valign_sup_action->setChecked(false);
+}
+
+void RichTextEditorToolBar::insertLink()
+{
+    AddLinkDialog linkDialog(m_editor, this);
+    linkDialog.showDialog();
+    m_editor->setFocus();
+}
+
+void RichTextEditorToolBar::insertImage()
+{
+    const QString path = QFileDialog::getOpenFileName(this, tr("Open File"),
+                                                    QDir::homePath(),
+                                                    tr("Images (*.png *.xpm *.jpg)"));
+    if (!path.isEmpty())
+        m_editor->insertHtml(QStringLiteral("<img src=\"") + path + QStringLiteral("\"/>"));
+}
+
+void RichTextEditorToolBar::layoutDirectionChanged()
+{
+    QTextCursor cursor = m_editor->textCursor();
+    QTextBlock block = cursor.block();
+    if (block.isValid()) {
+        QTextBlockFormat format = block.blockFormat();
+        const Qt::LayoutDirection newDirection = m_layoutDirectionAction->isChecked() ? Qt::RightToLeft : Qt::LeftToRight;
+        if (format.layoutDirection() != newDirection) {
+            format.setLayoutDirection(newDirection);
+            cursor.setBlockFormat(format);
+        }
+    }
+}
+
+void RichTextEditorToolBar::updateActions()
+{
+    if (m_editor == nullptr) {
+        setEnabled(false);
+        return;
+    }
+
+    const Qt::Alignment alignment = m_editor->alignment();
+    const QTextCursor cursor = m_editor->textCursor();
+    const QTextCharFormat charFormat = cursor.charFormat();
+    const QFont font = charFormat.font();
+    const QTextCharFormat::VerticalAlignment valign =
+        charFormat.verticalAlignment();
+    const bool superScript = valign == QTextCharFormat::AlignSuperScript;
+    const bool subScript = valign == QTextCharFormat::AlignSubScript;
+
+    if (alignment & Qt::AlignLeft) {
+        m_align_left_action->setChecked(true);
+    } else if (alignment & Qt::AlignRight) {
+        m_align_right_action->setChecked(true);
+    } else if (alignment & Qt::AlignHCenter) {
+        m_align_center_action->setChecked(true);
+    } else {
+        m_align_justify_action->setChecked(true);
+    }
+    m_layoutDirectionAction->setChecked(cursor.blockFormat().layoutDirection() == Qt::RightToLeft);
+
+    m_bold_action->setChecked(font.bold());
+    m_italic_action->setChecked(font.italic());
+    m_underline_action->setChecked(font.underline());
+    m_valign_sup_action->setChecked(superScript);
+    m_valign_sub_action->setChecked(subScript);
+
+    const int size = font.pointSize();
+    const int idx = m_font_size_input->findText(QString::number(size));
+    if (idx != -1)
+        m_font_size_input->setCurrentIndex(idx);
+
+    const int fidx = m_font_family_input->findText(QFontInfo(font).family());
+    if (fidx != -1)
+        m_font_family_input->setCurrentIndex(fidx);
+
+    m_color_action->setColor(m_editor->textColor());
+}

uis/addlinkdialog.ui

@@ -0,0 +1,112 @@
+<ui version="4.0" >
+ <class>AddLinkDialog</class>
+ <widget class="QDialog" name="AddLinkDialog" >
+  <property name="windowTitle" >
+   <string>Insert Link</string>
+  </property>
+  <property name="sizeGripEnabled" >
+   <bool>false</bool>
+  </property>
+  <property name="modal" >
+   <bool>true</bool>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout" >
+   <item>
+    <layout class="QFormLayout" >
+     <item row="0" column="0" >
+      <widget class="QLabel" name="label" >
+       <property name="text" >
+        <string>Title:</string>
+       </property>
+      </widget>
+     </item>
+     <item row="0" column="1" >
+      <widget class="QLineEdit" name="titleInput" >
+       <property name="minimumSize" >
+        <size>
+         <width>337</width>
+         <height>0</height>
+        </size>
+       </property>
+      </widget>
+     </item>
+     <item row="1" column="0" >
+      <widget class="QLabel" name="label_2" >
+       <property name="text" >
+        <string>URL:</string>
+       </property>
+      </widget>
+     </item>
+     <item row="1" column="1" >
+      <widget class="QLineEdit" name="urlInput" />
+     </item>
+    </layout>
+   </item>
+   <item>
+    <spacer name="verticalSpacer" >
+     <property name="orientation" >
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0" >
+      <size>
+       <width>0</width>
+       <height>0</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+   <item>
+    <widget class="Line" name="line" >
+     <property name="orientation" >
+      <enum>Qt::Horizontal</enum>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox" >
+     <property name="orientation" >
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons" >
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>AddLinkDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel" >
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel" >
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>AddLinkDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel" >
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel" >
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>