tqtinterface/qtinterface/qt4/Qt/qxmlserializer.h

/****************************************************************************
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
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#ifndef QXMLSERIALIZER_H
#define QXMLSERIALIZER_H

#include <QtXmlPatterns/QAbstractXmlReceiver>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(XmlPatterns)

class QIODevice;
class QTextCodec;
class QXmlQuery;
class QXmlSerializerPrivate;

class Q_XMLPATTERNS_EXPORT QXmlSerializer : public QAbstractXmlReceiver
{
public:
    QXmlSerializer(const QXmlQuery &query,
                   QIODevice *outputDevice);

    virtual void namespaceBinding(const QXmlName &nb);

    virtual void characters(const QStringRef &value);
    virtual void comment(const QString &value);

    virtual void startElement(const QXmlName &name);

    virtual void endElement();

    virtual void attribute(const QXmlName &name,
                           const QStringRef &value);

    virtual void processingInstruction(const QXmlName &name,
                                       const QString &value);

    virtual void atomicValue(const QVariant &value);

    virtual void startDocument();
    virtual void endDocument();
    virtual void startOfSequence();
    virtual void endOfSequence();

    QIODevice *outputDevice() const;

    void setCodec(const QTextCodec *codec);
    const QTextCodec *codec() const;

    /* The members below are internal, not part of the public API, and
     * unsupported. Using them leads to undefined behavior. */
    virtual void item(const QPatternist::Item &item);
protected:
    QXmlSerializer(QAbstractXmlReceiverPrivate *d);

private:
    inline bool isBindingInScope(const QXmlName nb) const;

    /**
     * Where in the document the QXmlSerializer is currently working.
     */
    enum State
    {
        /**
         * Before the document element. This is the XML prolog where the
         * XML declaration, and possibly comments and processing
         * instructions are found.
         */
        BeforeDocumentElement,

        /**
         * This is inside the document element, at any level.
         */
        InsideDocumentElement
    };

    /**
     * If the current state is neither BeforeDocumentElement or
     * AfterDocumentElement.
     */
    inline bool atDocumentRoot() const;

    /**
     * Closes any open element start tag. Must be called before outputting
     * any element content.
     */
    inline void startContent();

    /**
     * Escapes content intended as text nodes for elements.
     */
    void writeEscaped(const QString &toEscape);

    /**
     * Identical to writeEscaped(), but also escapes quotes.
     */
    inline void writeEscapedAttribute(const QString &toEscape);

    /**
     * Writes out @p name.
     */
    inline void write(const QXmlName &name);

    inline void write(const char *const chars);
    /**
     * Encodes and writes out @p content.
     */
    inline void write(const QString &content);

    Q_DECLARE_PRIVATE(QXmlSerializer)
};

QT_END_NAMESPACE

QT_END_HEADER

#endif