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

**

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** This file is part of the QtSvg 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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****************************************************************************/

#ifndef QSVGHANDLER_P_H

#define QSVGHANDLER_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 "QtXml/qxmlstream.h"

#ifndef QT_NO_SVG

#include "QtCore/qhash.h"

#include "QtCore/qstack.h"

#include "qsvgstyle_p.h"

#include "private/qcssparser_p.h"

#include "private/qsvggraphics_p.h"

QT_BEGIN_NAMESPACE

class QSvgNode;

class QSvgTinyDocument;

class QSvgHandler;

class QColor;

class QSvgStyleSelector;

class QXmlStreamReader;

struct QSvgCssAttribute

{

    QXmlStreamStringRef name;

    QXmlStreamStringRef value;

};

class QSvgHandler

{

public:

    enum LengthType {

        LT_PERCENT,

        LT_PX,

        LT_PC,

        LT_PT,

        LT_MM,

        LT_CM,

        LT_IN,

        LT_OTHER

    };

public:

    QSvgHandler(QIODevice *device);

    QSvgHandler(const QByteArray &data);

    QSvgHandler(QXmlStreamReader *const data);

    ~QSvgHandler();

    QSvgTinyDocument *document() const;

    inline bool ok() const {

        return document() != 0 && !xml->hasError();

    }

    inline QString errorString() const { return xml->errorString(); }

    inline int lineNumber() const { return xml->lineNumber(); }

    void setDefaultCoordinateSystem(LengthType type);

    LengthType defaultCoordinateSystem() const;

    void pushColor(const QColor &color);

    void pushColorCopy();

    void popColor();

    QColor currentColor() const;

    void setInStyle(bool b);

    bool inStyle() const;

    QSvgStyleSelector *selector() const;

    void setAnimPeriod(int start, int end);

    int animationDuration() const;

    void parseCSStoXMLAttrs(QString css, QVector<QSvgCssAttribute> *attributes);

    inline QPen defaultPen() const

    { return m_defaultPen; }

public:

    bool startElement(const QString &localName, const QXmlStreamAttributes &attributes);

    bool endElement(const QStringRef &localName);

    bool characters(const QStringRef &str);

    bool processingInstruction(const QString &target, const QString &data);

private:

    void init();

    QSvgTinyDocument *m_doc;

    QStack<QSvgNode*> m_nodes;

    QList<QSvgNode*>  m_resolveNodes;

    enum CurrentNode

    {

        Unknown,

        Graphics,

        Style

    };

    QStack<CurrentNode> m_skipNodes;

    /*!

        Follows the depths of elements. The top is current xml:space

        value that applies for a given element.

     */

    QStack<QSvgText::WhitespaceMode> m_whitespaceMode;

    QSvgRefCounter<QSvgStyleProperty> m_style;

    LengthType m_defaultCoords;

    QStack<QColor> m_colorStack;

    QStack<int>    m_colorTagCount;

    bool m_inStyle;

    QSvgStyleSelector *m_selector;

    int m_animEnd;

    QXmlStreamReader *const xml;

    QCss::Parser m_cssParser;

    void parse();

    void resolveGradients(QSvgNode *node);

    QPen m_defaultPen;

    /**

     * Whether we own the variable xml, and hence whether

     * we need to delete it.

     */

    const bool m_ownsReader;

};

QT_END_NAMESPACE

#endif // QT_NO_SVG

#endif // QSVGHANDLER_P_H