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

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** This file is part of the documentation of the Qt Toolkit.

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** contained in the Technology Preview License Agreement accompanying

** this package.

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** General Public License version 2.1 as published by the Free Software

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

#include <QtGui>

#include "xmlwriter.h"

QDomDocument *XmlWriter::toXml()

{

    QDomImplementation implementation;

    QDomDocumentType docType = implementation.createDocumentType(

        "scribe-document", "scribe", "qt.nokia.com/scribe");

    document = new QDomDocument(docType);

    // ### This processing instruction is required to ensure that any kind

    // of encoding is given when the document is written.

    QDomProcessingInstruction process = document->createProcessingInstruction(

        "xml", "version=\"1.0\" encoding=\"utf-8\"");

    document->appendChild(process);

    QDomElement documentElement = document->createElement("document");

    document->appendChild(documentElement);

//! [0]

    QTextFrame *root = textDocument->rootFrame();

//! [0]

    if (root)

        processFrame(documentElement, root);

    return document;

}

void XmlWriter::processBlock(QDomElement &parent, const QTextBlock &block)

{

    QDomElement blockElement = document->createElement("block");

    blockElement.setAttribute("position", block.position());

    blockElement.setAttribute("length", block.length());

    parent.appendChild(blockElement);

    QTextBlock::iterator it;

    for (it = block.begin(); !(it.atEnd()); ++it) {

        QTextFragment fragment = it.fragment();

        if (fragment.isValid()) {

            QDomElement fragmentElement = document->createElement("fragment");

            blockElement.appendChild(fragmentElement);

            fragmentElement.setAttribute("length", fragment.length());

            QDomText fragmentText = document->createTextNode(fragment.text());

            fragmentElement.appendChild(fragmentText);

        }

    }

}

void XmlWriter::processFrame(QDomElement &parent, QTextFrame *frame)

{

    QDomElement frameElement = document->createElement("frame");

    frameElement.setAttribute("begin", frame->firstPosition());

    frameElement.setAttribute("end", frame->lastPosition());

    parent.appendChild(frameElement);

//! [1]

    QTextFrame::iterator it;

    for (it = frame->begin(); !(it.atEnd()); ++it) {

        QTextFrame *childFrame = it.currentFrame();

        QTextBlock childBlock = it.currentBlock();

        if (childFrame)

//! [1] //! [2]

            processFrame(frameElement, childFrame);

        else if (childBlock.isValid())

            processBlock(frameElement, childBlock);

    }

//! [2]

}