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

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbWidgets module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** 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 will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** 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.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

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

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Hb API.  It exists purely as an

// implementation detail.  This file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#ifndef HBABSTRACTEDIT_P_H

#define HBABSTRACTEDIT_P_H

//#define HB_DEBUG_EDITOR_DRAW_RECTS

//#define HB_DEBUG_EDITOR_HANDLES

#include "hbglobal.h"

#include "hbstyle.h"

#include "hbwidget_p.h"

#include "hbscrollarea.h"

#include "hbscrollarea_p.h"

#include "hbabstractedit.h"

#include "hbvalidator.h"

#include "hbformatdialog.h"

#include <QEvent>

#include <QTextCursor>

#include <QBasicTimer>

#include <QTextDocumentFragment>

#include <QPainter>

#include <QDebug>

class QEvent;

class QGraphicsSceneMouseEvent;

class QTextDocument;

class HbWidget;

class HbScrollArea;

class HbValidator;

class HbSelectionControl;

class HbSmileyEngine;

class HbFormatDialog;

class HbAbstractEditMimeData : public QMimeData

{

public:

    inline HbAbstractEditMimeData(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;

};

class HB_AUTOTEST_EXPORT HbAbstractEditPrivate: public HbWidgetPrivate {

    Q_DECLARE_PUBLIC(HbAbstractEdit)

    typedef HbValidator::ChangeSource CursorChange;

public:

    HbAbstractEditPrivate ();

    virtual ~HbAbstractEditPrivate ();

    void init();

    virtual void updatePaletteFromTheme();

    void acceptKeyPressEvent(QKeyEvent *event);

public:

    void removeCurrentDocument();

    void connectToNewDocument(QTextDocument *newDoc);

    void setContent(Qt::TextFormat format = Qt::RichText, const QString &text = QString());

    void ensurePositionVisible(int position);

    void ensureCursorVisible();    

    bool setFocusToAnchor(const QTextCursor &newCursor);

    bool setFocusToNextOrPreviousAnchor(bool next);

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

    void setCursorPosition(int pos, QTextCursor::MoveMode mode = QTextCursor::MoveAnchor);

    bool cursorMoveKeyEvent(QKeyEvent *e);

    void repaintOldAndNewSelection(const QTextCursor &oldSelection);

    void updateCurrentCharFormat();

    QRectF cursorRectPlusUnicodeDirectionMarkers(int position) const;

    void setBlinkingCursorEnabled(bool enable);

    void repaintCursor();

    void setTextInteractionFlags(Qt::TextInteractionFlags flags);

    void cursorChanged(CursorChange origin);

    void selectionChanged(bool forceEmitSelectionChanged = false);

    QAbstractTextDocumentLayout::PaintContext getPaintContext() const;

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

    QRectF cursorRect(const QTextCursor &cursor) const;

    QRectF cursorRect() const;

    QRectF selectionRect(const QTextCursor &cursor) const;

    QRectF selectionRect() const;

    QRectF rectForPositionInCanvasCoords(int position, QTextLine::Edge edge) const;

    QRectF viewPortRect() const;

    QValidator::State validateContent(int position, int charsRemoved, int charsAdded);

    void initValidator();

    bool undo();

    virtual bool canPaste() const;

    virtual bool canCopy() const;

    virtual bool canCut() const;

    virtual void prepDocForPaste();

    bool canFormat() const;

    virtual bool isCursorVisible() const;

    void longTapGesture(const QPointF &point);

    void tapGesture(const QPointF &point);

    void gestureReceived();

    void sendInputPanelEvent(QEvent::Type type);

    void openInputPanel();

    void closeInputPanel();

    void minimizeInputPanel();

    int contentLength() const;

    bool hasAcceptableInput() const;

    void sendMouseEventToInputContext(const QPointF &tapPos) const;

    virtual void updateEditingSize();

    void drawSelectionEdges(QPainter *painter, QAbstractTextDocumentLayout::PaintContext);

    HbSmileyEngine* smileyEngineInstance() const;

    virtual void drawContentBackground(QPainter *painter,

                                       const QStyleOptionGraphicsItem &option) const;

    void updatePlaceholderDocProperties();

    void _q_updateRequest(QRectF rect);

    void _q_updateBlock(QTextBlock block);

    void _q_contentsChanged();

    void _q_contentsChange(int position, int charsRemoved, int charsAdded);

    void _q_selectionChanged();

    void _q_scrollStarted();

    void _q_scrollEnded();

    static Qt::Alignment alignmentFromString(const QString &text);

    void validateAndCorrect();

    QTextDocument *doc;

    QTextDocument *placeholderDoc;

    int previousCursorAnchor;

    int previousCursorPosition;

    QTextCursor cursor;

    QTextCursor selectionCursor;

    HbValidator* validator;

    bool imEditInProgress;

    int imPosition;

    int imAdded;

    int imRemoved;

    Qt::TextInteractionFlags interactionFlags;

    QPointF tapPosition;

    bool cursorOn;

    QTextCharFormat lastCharFormat;

    QBasicTimer cursorBlinkTimer;

    int preeditCursor;

    bool preeditCursorVisible; // used to hide the cursor in the preedit area

    bool apiCursorVisible;

    HbWidget *canvas;

    HbScrollArea *scrollArea;

    bool scrollable;

    bool hadSelectionOnMousePress;

    HbSelectionControl *selectionControl;

    bool acceptSignalContentsChange;

    bool acceptSignalContentsChanged;

    int validRevision;

    bool wasGesture;

    Hb::TextContextMenuFlags contextMenuShownOn;

    bool smileysEnabled;  

    mutable HbSmileyEngine *smileyEngine;

    HbFormatDialogPointer formatDialog;

    QTextCursor nextCharCursor;

private:

    static HbAbstractEditPrivate *d_ptr(HbAbstractEdit *edit) {

        Q_ASSERT(edit);

        return edit->d_func();

    }

    friend class HbEditScrollArea;

    friend class HbFormatDialog;

    friend class HbFormatDialogPrivate;

    // To be able to unit test private features

    friend class TestHbAbstractEdit;

    friend class TestHbLineEdit;

    friend class HbSelectionControl;

    friend class HbSelectionControlPrivate;

};

#endif // HBABSTRACTEDIT_P_H