/****************************************************************************
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the QtGui module of the Qt Toolkit.
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** This file contains pre-release code and may not be distributed.
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** 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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** In addition, as a special exception, Nokia gives you certain
** additional rights.  These rights are described in the Nokia Qt LGPL
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** If you have questions regarding the use of this file, please contact
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** $QT_END_LICENSE$
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****************************************************************************/

#ifndef QTEXTCONTROL_P_H
#define QTEXTCONTROL_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtGui/qtextdocument.h>
#include <QtGui/qtextoption.h>
#include <QtGui/qtextcursor.h>
#include <QtGui/qtextformat.h>
#include <QtGui/qtextedit.h>
#include <QtGui/qmenu.h>
#include <QtCore/qrect.h>
#include <QtGui/qabstracttextdocumentlayout.h>
#include <QtGui/qtextdocumentfragment.h>

#ifdef QT3_SUPPORT
#include <QtGui/qtextobject.h>
#include <QtGui/qtextlayout.h>
#endif

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class QStyleSheet;
class QTextDocument;
class QMenu;
class QTextControlPrivate;
class QMimeData;
class QAbstractScrollArea;
class QEvent;
class QTimerEvent;

class Q_GUI_EXPORT QTextControl : public QObject
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QTextControl)
#ifndef QT_NO_TEXTHTMLPARSER
    Q_PROPERTY(QString html READ toHtml WRITE setHtml NOTIFY textChanged USER true)
#endif
    Q_PROPERTY(bool overwriteMode READ overwriteMode WRITE setOverwriteMode)
    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(bool openExternalLinks READ openExternalLinks WRITE setOpenExternalLinks)
public:
    explicit QTextControl(QObject *parent = 0);
    explicit QTextControl(const QString &text, QObject *parent = 0);
    explicit QTextControl(QTextDocument *doc, QObject *parent = 0);
    virtual ~QTextControl();

    void setDocument(QTextDocument *document);
    QTextDocument *document() const;

    void setTextCursor(const QTextCursor &cursor);
    QTextCursor textCursor() const;

    void setTextInteractionFlags(Qt::TextInteractionFlags flags);
    Qt::TextInteractionFlags textInteractionFlags() const;

    void mergeCurrentCharFormat(const QTextCharFormat &modifier);

    void setCurrentCharFormat(const QTextCharFormat &format);
    QTextCharFormat currentCharFormat() const;

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

    inline QString toPlainText() const
    { return document()->toPlainText(); }
#ifndef QT_NO_TEXTHTMLPARSER
    inline QString toHtml() const
    { return document()->toHtml(); }
#endif

    virtual void ensureCursorVisible();

    virtual QVariant loadResource(int type, const QUrl &name);
#ifndef QT_NO_CONTEXTMENU
    QMenu *createStandardContextMenu(const QPointF &pos, QWidget *parent);
#endif

    QTextCursor cursorForPosition(const QPointF &pos) const;
    QRectF cursorRect(const QTextCursor &cursor) const;
    QRectF cursorRect() const;
    QRectF selectionRect(const QTextCursor &cursor) const;
    QRectF selectionRect() const;

    QString anchorAt(const QPointF &pos) const;
    QPointF anchorPosition(const QString &name) const;

    QString anchorAtCursor() const;

    bool overwriteMode() const;
    void setOverwriteMode(bool overwrite);

    int cursorWidth() const;
    void setCursorWidth(int width);

    bool acceptRichText() const;
    void setAcceptRichText(bool accept);

#ifndef QT_NO_TEXTEDIT
    void setExtraSelections(const QList<QTextEdit::ExtraSelection> &selections);
    QList<QTextEdit::ExtraSelection> extraSelections() const;
#endif

    void setTextWidth(qreal width);
    qreal textWidth() const;
    QSizeF size() const;

    void setOpenExternalLinks(bool open);
    bool openExternalLinks() const;

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

    bool canPaste() const;

    void setCursorIsFocusIndicator(bool b);
    bool cursorIsFocusIndicator() const;

#ifndef QT_NO_PRINTER
    void print(QPrinter *printer) const;
#endif

    virtual int hitTest(const QPointF &point, Qt::HitTestAccuracy accuracy) const;
    virtual QRectF blockBoundingRect(const QTextBlock &block) const;
    QAbstractTextDocumentLayout::PaintContext getPaintContext(QWidget *widget) const;



public Q_SLOTS:
    void setPlainText(const QString &text);
    void setHtml(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

    void append(const QString &text);
    void appendHtml(const QString &html);
    void appendPlainText(const QString &text);

    void adjustSize();

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();

    // control signals
    void updateRequest(const QRectF &rect = QRectF());
    void documentSizeChanged(const QSizeF &);
    void blockCountChanged(int newBlockCount);
    void visibilityRequest(const QRectF &rect);
    void microFocusChanged();
    void linkActivated(const QString &link);
    void linkHovered(const QString &);
    void modificationChanged(bool m);

public:
    // control properties
    QPalette palette() const;
    void setPalette(const QPalette &pal);

    virtual void processEvent(QEvent *e, const QMatrix &matrix, QWidget *contextWidget = 0);
    void processEvent(QEvent *e, const QPointF &coordinateOffset = QPointF(), QWidget *contextWidget = 0);

    // control methods
    void drawContents(QPainter *painter, const QRectF &rect = QRectF(), QWidget *widget = 0);

    void setFocus(bool focus, Qt::FocusReason = Qt::OtherFocusReason);

    virtual QVariant inputMethodQuery(Qt::InputMethodQuery property) const;

    virtual QMimeData *createMimeDataFromSelection() const;
    virtual bool canInsertFromMimeData(const QMimeData *source) const;
    virtual void insertFromMimeData(const QMimeData *source);

    bool setFocusToAnchor(const QTextCursor &newCursor);
    bool setFocusToNextOrPreviousAnchor(bool next);
    bool findNextPrevAnchor(const QTextCursor& from, bool next, QTextCursor& newAnchor);

protected:
    virtual void timerEvent(QTimerEvent *e);

    virtual bool event(QEvent *e);

private:
    Q_DISABLE_COPY(QTextControl)
    Q_PRIVATE_SLOT(d_func(), void _q_updateCurrentCharFormatAndSelection())
    Q_PRIVATE_SLOT(d_func(), void _q_emitCursorPosChanged(const QTextCursor &))
    Q_PRIVATE_SLOT(d_func(), void _q_deleteSelected())
    Q_PRIVATE_SLOT(d_func(), void _q_copyLink())
    Q_PRIVATE_SLOT(d_func(), void _q_updateBlock(const QTextBlock &))
    Q_PRIVATE_SLOT(d_func(), void _q_documentLayoutChanged())
};


#ifndef QT_NO_CONTEXTMENU
class QUnicodeControlCharacterMenu : public QMenu
{
    Q_OBJECT
public:
    QUnicodeControlCharacterMenu(QObject *editWidget, QWidget *parent);

private Q_SLOTS:
    void menuActionTriggered();

private:
    QObject *editWidget;
};
#endif // QT_NO_CONTEXTMENU


// also used by QLabel
class QTextEditMimeData : public QMimeData
{
public:
    inline QTextEditMimeData(const QTextDocumentFragment &aFragment) : fragment(aFragment) {}

    virtual QStringList formats() const;
protected:
    virtual QVariant retrieveData(const QString &mimeType, QVariant::Type type) const;
private:
    void setup() const;

    mutable QTextDocumentFragment fragment;
};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QTEXTCONTROL_H