/****************************************************************************

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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** This file is part of the QtGui module of the Qt Toolkit.

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** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

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** GNU Lesser General Public License Usage

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** 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

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** rights.  These rights are described in the Nokia Qt LGPL Exception

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** $QT_END_LICENSE$

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****************************************************************************/

#ifndef QPLAINTEXTEDIT_H

#define QPLAINTEXTEDIT_H

#include <QtGui/qtextedit.h>

#include <QtGui/qabstractscrollarea.h>

#include <QtGui/qtextdocument.h>

#include <QtGui/qtextoption.h>

#include <QtGui/qtextcursor.h>

#include <QtGui/qtextformat.h>

#include <QtGui/qabstracttextdocumentlayout.h>

#ifndef QT_NO_TEXTEDIT

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class QStyleSheet;

class QTextDocument;

class QMenu;

class QPlainTextEditPrivate;

class QMimeData;

class Q_GUI_EXPORT QPlainTextEdit : public QAbstractScrollArea

{

    Q_OBJECT

    Q_DECLARE_PRIVATE(QPlainTextEdit)

    Q_ENUMS(LineWrapMode)

    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(bool readOnly READ isReadOnly WRITE setReadOnly)

    Q_PROPERTY(QString plainText READ toPlainText WRITE setPlainText NOTIFY textChanged USER true)

    Q_PROPERTY(bool overwriteMode READ overwriteMode WRITE setOverwriteMode)

    Q_PROPERTY(int tabStopWidth READ tabStopWidth WRITE setTabStopWidth)

    Q_PROPERTY(int cursorWidth READ cursorWidth WRITE setCursorWidth)

    Q_PROPERTY(Qt::TextInteractionFlags textInteractionFlags READ textInteractionFlags WRITE setTextInteractionFlags)

    Q_PROPERTY(int blockCount READ blockCount)

    Q_PROPERTY(int maximumBlockCount READ maximumBlockCount WRITE setMaximumBlockCount)

    Q_PROPERTY(bool backgroundVisible READ backgroundVisible WRITE setBackgroundVisible)

    Q_PROPERTY(bool centerOnScroll READ centerOnScroll WRITE setCenterOnScroll)

public:

    enum LineWrapMode {

        NoWrap,

        WidgetWidth

    };

    explicit QPlainTextEdit(QWidget *parent = 0);

    explicit QPlainTextEdit(const QString &text, QWidget *parent = 0);

    virtual ~QPlainTextEdit();

    void setDocument(QTextDocument *document);

    QTextDocument *document() 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;

    void mergeCurrentCharFormat(const QTextCharFormat &modifier);

    void setCurrentCharFormat(const QTextCharFormat &format);

    QTextCharFormat currentCharFormat() const;

    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); }

    inline void setMaximumBlockCount(int maximum)

    { document()->setMaximumBlockCount(maximum); }

    inline int maximumBlockCount() const

    { return document()->maximumBlockCount(); }

    LineWrapMode lineWrapMode() const;

    void setLineWrapMode(LineWrapMode mode);

    QTextOption::WrapMode wordWrapMode() const;

    void setWordWrapMode(QTextOption::WrapMode policy);

    void setBackgroundVisible(bool visible);

    bool backgroundVisible() const;

    void setCenterOnScroll(bool enabled);

    bool centerOnScroll() const;

    bool find(const QString &exp, QTextDocument::FindFlags options = 0);

    inline QString toPlainText() const

    { return document()->toPlainText(); }

    void ensureCursorVisible();

    virtual QVariant loadResource(int type, const QUrl &name);

#ifndef QT_NO_CONTEXTMENU

    QMenu *createStandardContextMenu();

#endif

    QTextCursor cursorForPosition(const QPoint &pos) const;

    QRect cursorRect(const QTextCursor &cursor) const;

    QRect cursorRect() const;

    bool overwriteMode() const;

    void setOverwriteMode(bool overwrite);

    int tabStopWidth() const;

    void setTabStopWidth(int width);

    int cursorWidth() const;

    void setCursorWidth(int width);

    void setExtraSelections(const QList<QTextEdit::ExtraSelection> &selections);

    QList<QTextEdit::ExtraSelection> extraSelections() const;

    void moveCursor(QTextCursor::MoveOperation operation, QTextCursor::MoveMode mode = QTextCursor::MoveAnchor);

    bool canPaste() const;

#ifndef QT_NO_PRINTER

    void print(QPrinter *printer) const;

#endif

    int blockCount() const;

public Q_SLOTS:

    void setPlainText(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);

    void appendPlainText(const QString &text);

    void appendHtml(const QString &html);

    void centerCursor();

Q_SIGNALS:

    void textChanged();

    void undoAvailable(bool b);

    void redoAvailable(bool b);

    void copyAvailable(bool b);

    void selectionChanged();

    void cursorPositionChanged();

    void updateRequest(const QRect &rect, int dy);

    void blockCountChanged(int newBlockCount);

    void modificationChanged(bool);

protected:

    virtual bool event(QEvent *e);

    virtual void timerEvent(QTimerEvent *e);

    virtual void keyPressEvent(QKeyEvent *e);

    virtual void keyReleaseEvent(QKeyEvent *e);

    virtual void resizeEvent(QResizeEvent *e);

    virtual void paintEvent(QPaintEvent *e);

    virtual void mousePressEvent(QMouseEvent *e);

    virtual void mouseMoveEvent(QMouseEvent *e);

    virtual void mouseReleaseEvent(QMouseEvent *e);

    virtual void mouseDoubleClickEvent(QMouseEvent *e);

    virtual bool focusNextPrevChild(bool next);

#ifndef QT_NO_CONTEXTMENU

    virtual void contextMenuEvent(QContextMenuEvent *e);

#endif

#ifndef QT_NO_DRAGANDDROP

    virtual void dragEnterEvent(QDragEnterEvent *e);

    virtual void dragLeaveEvent(QDragLeaveEvent *e);

    virtual void dragMoveEvent(QDragMoveEvent *e);

    virtual void dropEvent(QDropEvent *e);

#endif

    virtual void focusInEvent(QFocusEvent *e);

    virtual void focusOutEvent(QFocusEvent *e);

    virtual void showEvent(QShowEvent *);

    virtual void changeEvent(QEvent *e);

#ifndef QT_NO_WHEELEVENT

    virtual void wheelEvent(QWheelEvent *e);

#endif

    virtual QMimeData *createMimeDataFromSelection() const;

    virtual bool canInsertFromMimeData(const QMimeData *source) const;

    virtual void insertFromMimeData(const QMimeData *source);

    virtual void inputMethodEvent(QInputMethodEvent *);

    QVariant inputMethodQuery(Qt::InputMethodQuery property) const;

    QPlainTextEdit(QPlainTextEditPrivate &dd, QWidget *parent);

    virtual void scrollContentsBy(int dx, int dy);

    QTextBlock firstVisibleBlock() const;

    QPointF contentOffset() const;

    QRectF blockBoundingRect(const QTextBlock &block) const;

    QRectF blockBoundingGeometry(const QTextBlock &block) const;

    QAbstractTextDocumentLayout::PaintContext getPaintContext() const;

private:

    Q_DISABLE_COPY(QPlainTextEdit)

    Q_PRIVATE_SLOT(d_func(), void _q_repaintContents(const QRectF &r))

    Q_PRIVATE_SLOT(d_func(), void _q_adjustScrollbars())

    Q_PRIVATE_SLOT(d_func(), void _q_verticalScrollbarActionTriggered(int))

    Q_PRIVATE_SLOT(d_func(), void _q_cursorPositionChanged())

    friend class QPlainTextEditControl;

};

class QPlainTextDocumentLayoutPrivate;

class Q_GUI_EXPORT QPlainTextDocumentLayout : public QAbstractTextDocumentLayout

{

    Q_OBJECT

    Q_DECLARE_PRIVATE(QPlainTextDocumentLayout)

    Q_PROPERTY(int cursorWidth READ cursorWidth WRITE setCursorWidth)

public:

    QPlainTextDocumentLayout(QTextDocument *document);

    ~QPlainTextDocumentLayout();

    void draw(QPainter *, const PaintContext &);

    int hitTest(const QPointF &, Qt::HitTestAccuracy ) const;

    int pageCount() const;

    QSizeF documentSize() const;

    QRectF frameBoundingRect(QTextFrame *) const;

    QRectF blockBoundingRect(const QTextBlock &block) const;

    void ensureBlockLayout(const QTextBlock &block) const;

    void setCursorWidth(int width);

    int cursorWidth() const;

    void requestUpdate();

protected:

    void documentChanged(int from, int /*charsRemoved*/, int charsAdded);

private:

    void setTextWidth(qreal newWidth);

    qreal textWidth() const;

    void layoutBlock(const QTextBlock &block);

    qreal blockWidth(const QTextBlock &block);

    QPlainTextDocumentLayoutPrivate *priv() const;

    friend class QPlainTextEdit;

    friend class QPlainTextEditPrivate;

};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QT_NO_TEXTEDIT

#endif // QPLAINTEXTEDIT_H