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

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** 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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** 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.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** 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 Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

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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 QTEXTDOCUMENT_H

#define QTEXTDOCUMENT_H

#include <QtCore/qobject.h>

#include <QtCore/qsize.h>

#include <QtCore/qrect.h>

#include <QtGui/qfont.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class QTextFormatCollection;

class QTextListFormat;

class QRect;

class QPainter;

class QPrinter;

class QAbstractTextDocumentLayout;

class QPoint;

class QTextCursor;

class QTextObject;

class QTextFormat;

class QTextFrame;

class QTextBlock;

class QTextCodec;

class QUrl;

class QVariant;

class QRectF;

class QTextOption;

template<typename T> class QVector;

namespace Qt

{

    enum HitTestAccuracy { ExactHit, FuzzyHit };

    enum WhiteSpaceMode {

        WhiteSpaceNormal,

        WhiteSpacePre,

        WhiteSpaceNoWrap,

        WhiteSpaceModeUndefined = -1

    };

    Q_GUI_EXPORT bool mightBeRichText(const QString&);

    Q_GUI_EXPORT QString escape(const QString& plain);

    Q_GUI_EXPORT QString convertFromPlainText(const QString &plain, WhiteSpaceMode mode = WhiteSpacePre);

#ifndef QT_NO_TEXTCODEC

    Q_GUI_EXPORT QTextCodec *codecForHtml(const QByteArray &ba);

#endif

}

class Q_GUI_EXPORT QAbstractUndoItem

{

public:

    virtual ~QAbstractUndoItem() = 0;

    virtual void undo() = 0;

    virtual void redo() = 0;

};

inline QAbstractUndoItem::~QAbstractUndoItem()

{

}

class QTextDocumentPrivate;

class Q_GUI_EXPORT QTextDocument : public QObject

{

    Q_OBJECT

    Q_PROPERTY(bool undoRedoEnabled READ isUndoRedoEnabled WRITE setUndoRedoEnabled)

    Q_PROPERTY(bool modified READ isModified WRITE setModified DESIGNABLE false)

    Q_PROPERTY(QSizeF pageSize READ pageSize WRITE setPageSize)

    Q_PROPERTY(QFont defaultFont READ defaultFont WRITE setDefaultFont)

    Q_PROPERTY(bool useDesignMetrics READ useDesignMetrics WRITE setUseDesignMetrics)

    Q_PROPERTY(QSizeF size READ size)

    Q_PROPERTY(qreal textWidth READ textWidth WRITE setTextWidth)

    Q_PROPERTY(int blockCount READ blockCount)

    Q_PROPERTY(qreal indentWidth READ indentWidth WRITE setIndentWidth)

#ifndef QT_NO_CSSPARSER

    Q_PROPERTY(QString defaultStyleSheet READ defaultStyleSheet WRITE setDefaultStyleSheet)

#endif

    Q_PROPERTY(int maximumBlockCount READ maximumBlockCount WRITE setMaximumBlockCount)

    Q_PROPERTY(qreal documentMargin READ documentMargin WRITE setDocumentMargin)

    QDOC_PROPERTY(QTextOption defaultTextOption READ defaultTextOption WRITE setDefaultTextOption)

public:

    explicit QTextDocument(QObject *parent = 0);

    explicit QTextDocument(const QString &text, QObject *parent = 0);

    ~QTextDocument();

    QTextDocument *clone(QObject *parent = 0) const;

    bool isEmpty() const;

    virtual void clear();

    void setUndoRedoEnabled(bool enable);

    bool isUndoRedoEnabled() const;

    bool isUndoAvailable() const;

    bool isRedoAvailable() const;

    int revision() const;

    void setDocumentLayout(QAbstractTextDocumentLayout *layout);

    QAbstractTextDocumentLayout *documentLayout() const;

    enum MetaInformation {

        DocumentTitle,

        DocumentUrl

    };

    void setMetaInformation(MetaInformation info, const QString &);

    QString metaInformation(MetaInformation info) const;

#ifndef QT_NO_TEXTHTMLPARSER

    QString toHtml(const QByteArray &encoding = QByteArray()) const;

    void setHtml(const QString &html);

#endif

    QString toPlainText() const;

    void setPlainText(const QString &text);

    QChar characterAt(int pos) const;

    enum FindFlag

    {

        FindBackward        = 0x00001,

        FindCaseSensitively = 0x00002,

        FindWholeWords      = 0x00004

    };

    Q_DECLARE_FLAGS(FindFlags, FindFlag)

    QTextCursor find(const QString &subString, int from = 0, FindFlags options = 0) const;

    QTextCursor find(const QString &subString, const QTextCursor &from, FindFlags options = 0) const;

    QTextCursor find(const QRegExp &expr, int from = 0, FindFlags options = 0) const;

    QTextCursor find(const QRegExp &expr, const QTextCursor &from, FindFlags options = 0) const;

    QTextFrame *frameAt(int pos) const;

    QTextFrame *rootFrame() const;

    QTextObject *object(int objectIndex) const;

    QTextObject *objectForFormat(const QTextFormat &) const;

    QTextBlock findBlock(int pos) const;

    QTextBlock findBlockByNumber(int blockNumber) const;

    QTextBlock findBlockByLineNumber(int blockNumber) const;

    QTextBlock begin() const;

    QTextBlock end() const;

    QTextBlock firstBlock() const;

    QTextBlock lastBlock() const;

    void setPageSize(const QSizeF &size);

    QSizeF pageSize() const;

    void setDefaultFont(const QFont &font);

    QFont defaultFont() const;

    int pageCount() const;

    bool isModified() const;

#ifndef QT_NO_PRINTER

    void print(QPrinter *printer) const;

#endif

    enum ResourceType {

        HtmlResource  = 1,

        ImageResource = 2,

        StyleSheetResource = 3,

        UserResource  = 100

    };

    QVariant resource(int type, const QUrl &name) const;

    void addResource(int type, const QUrl &name, const QVariant &resource);

    QVector<QTextFormat> allFormats() const;

    void markContentsDirty(int from, int length);

    void setUseDesignMetrics(bool b);

    bool useDesignMetrics() const;

    void drawContents(QPainter *painter, const QRectF &rect = QRectF());

    void setTextWidth(qreal width);

    qreal textWidth() const;

    qreal idealWidth() const;

    qreal indentWidth() const;

    void setIndentWidth(qreal width);

    qreal documentMargin() const;

    void setDocumentMargin(qreal margin);

    void adjustSize();

    QSizeF size() const;

    int blockCount() const;

    int lineCount() const;

    int characterCount() const;

#ifndef QT_NO_CSSPARSER

    void setDefaultStyleSheet(const QString &sheet);

    QString defaultStyleSheet() const;

#endif

    void undo(QTextCursor *cursor);

    void redo(QTextCursor *cursor);

    int maximumBlockCount() const;

    void setMaximumBlockCount(int maximum);

    QTextOption defaultTextOption() const;

    void setDefaultTextOption(const QTextOption &option);

Q_SIGNALS:

    void contentsChange(int from, int charsRemoves, int charsAdded);

    void contentsChanged();

    void undoAvailable(bool);

    void redoAvailable(bool);

    void undoCommandAdded();

    void modificationChanged(bool m);

    void cursorPositionChanged(const QTextCursor &cursor);

    void blockCountChanged(int newBlockCount);

    void documentLayoutChanged();

public Q_SLOTS:

    void undo();

    void redo();

    void appendUndoItem(QAbstractUndoItem *);

    void setModified(bool m = true);

protected:

    virtual QTextObject *createObject(const QTextFormat &f);

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

    QTextDocument(QTextDocumentPrivate &dd, QObject *parent);

public:

    QTextDocumentPrivate *docHandle() const;

private:

    Q_DISABLE_COPY(QTextDocument)

    Q_DECLARE_PRIVATE(QTextDocument)

    friend class QTextObjectPrivate;

};

Q_DECLARE_OPERATORS_FOR_FLAGS(QTextDocument::FindFlags)

QT_END_NAMESPACE

QT_END_HEADER

#endif // QTEXTDOCUMENT_H