qtextedit.h

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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QTEXTEDIT_H
#define QTEXTEDIT_H
 
#include <QtWidgets/qtwidgetsglobal.h>
#include <QtWidgets/qabstractscrollarea.h>
#include <QtGui/qtextdocument.h>
#include <QtGui/qtextoption.h>
#include <QtGui/qtextcursor.h>
#include <QtGui/qtextformat.h>
 
QT_REQUIRE_CONFIG(textedit);
 
QT_BEGIN_NAMESPACE
 
class QStyleSheet;
class QTextDocument;
class QMenu;
class QTextEditPrivate;
class QMimeData;
class QPagedPaintDevice;
class QRegularExpression;
 
class Q_WIDGETS_EXPORT QTextEdit : public QAbstractScrollArea
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QTextEdit)
    Q_PROPERTY(AutoFormatting autoFormatting READ autoFormatting WRITE setAutoFormatting)
    Q_PROPERTY(bool tabChangesFocus READ tabChangesFocus WRITE setTabChangesFocus)
    Q_PROPERTY(QString documentTitle READ documentTitle WRITE setDocumentTitle)
    Q_PROPERTY(bool undoRedoEnabled READ isUndoRedoEnabled WRITE setUndoRedoEnabled)
    Q_PROPERTY(LineWrapMode lineWrapMode READ lineWrapMode WRITE setLineWrapMode)
    QDOC_PROPERTY(QTextOption::WrapMode wordWrapMode READ wordWrapMode WRITE setWordWrapMode)
    Q_PROPERTY(int lineWrapColumnOrWidth READ lineWrapColumnOrWidth WRITE setLineWrapColumnOrWidth)
    Q_PROPERTY(bool readOnly READ isReadOnly WRITE setReadOnly)
#if QT_CONFIG(textmarkdownreader) && QT_CONFIG(textmarkdownwriter)
    Q_PROPERTY(QString markdown READ toMarkdown WRITE setMarkdown NOTIFY textChanged)
#endif
#ifndef QT_NO_TEXTHTMLPARSER
    Q_PROPERTY(QString html READ toHtml WRITE setHtml NOTIFY textChanged USER true)
#endif
    Q_PROPERTY(QString plainText READ toPlainText WRITE setPlainText DESIGNABLE false)
    Q_PROPERTY(bool overwriteMode READ overwriteMode WRITE setOverwriteMode)
    Q_PROPERTY(qreal tabStopDistance READ tabStopDistance WRITE setTabStopDistance)
    Q_PROPERTY(bool acceptRichText READ acceptRichText WRITE setAcceptRichText)
    Q_PROPERTY(int cursorWidth READ cursorWidth WRITE setCursorWidth)
    Q_PROPERTY(Qt::TextInteractionFlags textInteractionFlags READ textInteractionFlags
               WRITE setTextInteractionFlags)
    Q_PROPERTY(QTextDocument *document READ document WRITE setDocument DESIGNABLE false)
    Q_PROPERTY(QString placeholderText READ placeholderText WRITE setPlaceholderText)
public:
    enum LineWrapMode {
        NoWrap,
        WidgetWidth,
        FixedPixelWidth,
        FixedColumnWidth
    };
    Q_ENUM(LineWrapMode)
 
    enum AutoFormattingFlag {
        AutoNone = 0,
        AutoBulletList = 0x00000001,
        AutoAll = 0xffffffff
    };
 
    Q_DECLARE_FLAGS(AutoFormatting, AutoFormattingFlag)
    Q_FLAG(AutoFormatting)
 
    explicit QTextEdit(QWidget *parent = nullptr);
    explicit QTextEdit(const QString &text, QWidget *parent = nullptr);
    virtual ~QTextEdit();
 
    void setDocument(QTextDocument *document);
    QTextDocument *document() const;
 
    void setPlaceholderText(const QString &placeholderText);
    QString placeholderText() const;
 
    void setTextCursor(const QTextCursor &cursor);
    QTextCursor textCursor() const;
 
    bool isReadOnly() const;
    void setReadOnly(bool ro);
 
    void setTextInteractionFlags(Qt::TextInteractionFlags flags);
    Qt::TextInteractionFlags textInteractionFlags() const;
 
    qreal fontPointSize() const;
    QString fontFamily() const;
    int fontWeight() const;
    bool fontUnderline() const;
    bool fontItalic() const;
    QColor textColor() const;
    QColor textBackgroundColor() const;
    QFont currentFont() const;
    Qt::Alignment alignment() const;
 
    void mergeCurrentCharFormat(const QTextCharFormat &modifier);
 
    void setCurrentCharFormat(const QTextCharFormat &format);
    QTextCharFormat currentCharFormat() const;
 
    AutoFormatting autoFormatting() const;
    void setAutoFormatting(AutoFormatting features);
 
    bool tabChangesFocus() const;
    void setTabChangesFocus(bool b);
 
    inline void setDocumentTitle(const QString &title)
    { document()->setMetaInformation(QTextDocument::DocumentTitle, title); }
    inline QString documentTitle() const
    { return document()->metaInformation(QTextDocument::DocumentTitle); }
 
    inline bool isUndoRedoEnabled() const
    { return document()->isUndoRedoEnabled(); }
    inline void setUndoRedoEnabled(bool enable)
    { document()->setUndoRedoEnabled(enable); }
 
    LineWrapMode lineWrapMode() const;
    void setLineWrapMode(LineWrapMode mode);
 
    int lineWrapColumnOrWidth() const;
    void setLineWrapColumnOrWidth(int w);
 
    QTextOption::WrapMode wordWrapMode() const;
    void setWordWrapMode(QTextOption::WrapMode policy);
 
    bool find(const QString &exp, QTextDocument::FindFlags options = QTextDocument::FindFlags());
#if QT_CONFIG(regularexpression)
    bool find(const QRegularExpression &exp, QTextDocument::FindFlags options = QTextDocument::FindFlags());
#endif
 
    QString toPlainText() const;
#ifndef QT_NO_TEXTHTMLPARSER
    QString toHtml() const;
#endif
#if QT_CONFIG(textmarkdownwriter)
    QString toMarkdown(QTextDocument::MarkdownFeatures features = QTextDocument::MarkdownDialectGitHub) const;
#endif
 
    void ensureCursorVisible();
 
    Q_INVOKABLE virtual QVariant loadResource(int type, const QUrl &name);
#ifndef QT_NO_CONTEXTMENU
    QMenu *createStandardContextMenu();
    QMenu *createStandardContextMenu(const QPoint &position);
#endif
 
    QTextCursor cursorForPosition(const QPoint &pos) const;
    QRect cursorRect(const QTextCursor &cursor) const;
    QRect cursorRect() const;
 
    QString anchorAt(const QPoint& pos) const;
 
    bool overwriteMode() const;
    void setOverwriteMode(bool overwrite);
 
    qreal tabStopDistance() const;
    void setTabStopDistance(qreal distance);
 
    int cursorWidth() const;
    void setCursorWidth(int width);
 
    bool acceptRichText() const;
    void setAcceptRichText(bool accept);
 
    struct ExtraSelection
    {
        QTextCursor cursor;
        QTextCharFormat format;
    };
    void setExtraSelections(const QList<ExtraSelection> &selections);
    QList<ExtraSelection> extraSelections() const;
 
    void moveCursor(QTextCursor::MoveOperation operation, QTextCursor::MoveMode mode = QTextCursor::MoveAnchor);
 
    bool canPaste() const;
 
    void print(QPagedPaintDevice *printer) const;
 
    QVariant inputMethodQuery(Qt::InputMethodQuery property) const override;
    Q_INVOKABLE QVariant inputMethodQuery(Qt::InputMethodQuery query, QVariant argument) const;
 
public Q_SLOTS:
    void setFontPointSize(qreal s);
    void setFontFamily(const QString &fontFamily);
    void setFontWeight(int w);
    void setFontUnderline(bool b);
    void setFontItalic(bool b);
    void setTextColor(const QColor &c);
    void setTextBackgroundColor(const QColor &c);
    void setCurrentFont(const QFont &f);
    void setAlignment(Qt::Alignment a);
 
    void setPlainText(const QString &text);
#ifndef QT_NO_TEXTHTMLPARSER
    void setHtml(const QString &text);
#endif
#if QT_CONFIG(textmarkdownreader)
    void setMarkdown(const QString &markdown);
#endif
    void setText(const QString &text);
 
#ifndef QT_NO_CLIPBOARD
    void cut();
    void copy();
    void paste();
#endif
 
    void undo();
    void redo();
 
    void clear();
    void selectAll();
 
    void insertPlainText(const QString &text);
#ifndef QT_NO_TEXTHTMLPARSER
    void insertHtml(const QString &text);
#endif // QT_NO_TEXTHTMLPARSER
 
    void append(const QString &text);
 
    void scrollToAnchor(const QString &name);
 
    void zoomIn(int range = 1);
    void zoomOut(int range = 1);
 
Q_SIGNALS:
    void textChanged();
    void undoAvailable(bool b);
    void redoAvailable(bool b);
    void currentCharFormatChanged(const QTextCharFormat &format);
    void copyAvailable(bool b);
    void selectionChanged();
    void cursorPositionChanged();
 
protected:
    virtual bool event(QEvent *e) override;
    virtual void timerEvent(QTimerEvent *e) override;
    virtual void keyPressEvent(QKeyEvent *e) override;
    virtual void keyReleaseEvent(QKeyEvent *e) override;
    virtual void resizeEvent(QResizeEvent *e) override;
    virtual void paintEvent(QPaintEvent *e) override;
    virtual void mousePressEvent(QMouseEvent *e) override;
    virtual void mouseMoveEvent(QMouseEvent *e) override;
    virtual void mouseReleaseEvent(QMouseEvent *e) override;
    virtual void mouseDoubleClickEvent(QMouseEvent *e) override;
    virtual bool focusNextPrevChild(bool next) override;
#ifndef QT_NO_CONTEXTMENU
    virtual void contextMenuEvent(QContextMenuEvent *e) override;
#endif
#if QT_CONFIG(draganddrop)
    virtual void dragEnterEvent(QDragEnterEvent *e) override;
    virtual void dragLeaveEvent(QDragLeaveEvent *e) override;
    virtual void dragMoveEvent(QDragMoveEvent *e) override;
    virtual void dropEvent(QDropEvent *e) override;
#endif
    virtual void focusInEvent(QFocusEvent *e) override;
    virtual void focusOutEvent(QFocusEvent *e) override;
    virtual void showEvent(QShowEvent *) override;
    virtual void changeEvent(QEvent *e) override;
#if QT_CONFIG(wheelevent)
    virtual void wheelEvent(QWheelEvent *e) override;
#endif
 
    virtual QMimeData *createMimeDataFromSelection() const;
    virtual bool canInsertFromMimeData(const QMimeData *source) const;
    virtual void insertFromMimeData(const QMimeData *source);
 
    virtual void inputMethodEvent(QInputMethodEvent *) override;
 
    QTextEdit(QTextEditPrivate &dd, QWidget *parent);
 
    virtual void scrollContentsBy(int dx, int dy) override;
    virtual void doSetTextCursor(const QTextCursor &cursor);
 
    void zoomInF(float range);
 
private:
    Q_DISABLE_COPY(QTextEdit)
    friend class QTextEditControl;
    friend class QTextDocument;
    friend class QWidgetTextControl;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS(QTextEdit::AutoFormatting)
 
QT_END_NAMESPACE
 
#endif // QTEXTEDIT_H