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/*

  pagegenerator.cpp

*/

#include <QtCore>

#include <qfile.h>

#include <qfileinfo.h>

#include "pagegenerator.h"

#include "tree.h"

QT_BEGIN_NAMESPACE

/*!

  Nothing to do in the constructor.

 */

PageGenerator::PageGenerator()

{

    // nothing.

}

/*!

  The destructor 

 */

PageGenerator::~PageGenerator()

{

    while (!outStreamStack.isEmpty())

	endSubPage();

}

/*!

  This function is recursive.

 */

void PageGenerator::generateTree(const Tree *tree, CodeMarker *marker)

{

    generateInnerNode(tree->root(), marker);

}

QString PageGenerator::fileBase(const Node *node)

{

    if (node->relates())

	node = node->relates();

    else if (!node->isInnerNode())

	node = node->parent();

#ifdef QDOC_QML

    if (node->subType() == Node::QmlPropertyGroup) {

        node = node->parent();

    }

#endif        

    QString base = node->doc().baseName();

    if (!base.isEmpty())

        return base;

    const Node *p = node;

    forever {

        const Node *pp = p->parent();

        base.prepend(p->name());

#ifdef QDOC_QML

        /*

          To avoid file name conflicts in the html directory,

          we prepend "qml-" to the file name of QML element doc

          files.

         */

        if (p->subType() == Node::QmlClass) {

            base.prepend("qml-");

        }

#endif        

        if (!pp || pp->name().isEmpty() || pp->type() == Node::Fake)

            break;

        base.prepend(QLatin1Char('-'));

        p = pp;

    }

    if (node->type() == Node::Fake) {

#ifdef QDOC2_COMPAT

        if (base.endsWith(".html"))

            base.truncate(base.length() - 5);

#endif

    }

    // the code below is effectively equivalent to:

    //   base.replace(QRegExp("[^A-Za-z0-9]+"), " ");

    //   base = base.trimmed();

    //   base.replace(" ", "-");

    //   base = base.toLower();

    // as this function accounted for ~8% of total running time

    // we optimize a bit...

    QString res;

    // +5 prevents realloc in fileName() below

    res.reserve(base.size() + 5);

    bool begun = false;

    for (int i = 0; i != base.size(); ++i) {

        QChar c = base.at(i);

        uint u = c.unicode();

        if (u >= 'A' && u <= 'Z')

            u -= 'A' - 'a';

        if ((u >= 'a' &&  u <= 'z') || (u >= '0' && u <= '9')) {

            res += QLatin1Char(u);

            begun = true;

        }

        else if (begun) {

            res += QLatin1Char('-');

            begun = false;

        }

    }

    while (res.endsWith(QLatin1Char('-')))

        res.chop(1);

    return res;

}

QString PageGenerator::fileName(const Node *node)

{

    if (!node->url().isEmpty())

        return node->url();

    QString name = fileBase(node);

    name += QLatin1Char('.');

    name += fileExtension(node);

    return name;

}

QString PageGenerator::outFileName()

{

    return QFileInfo(static_cast<QFile *>(out().device())->fileName()).fileName();

}

void PageGenerator::beginSubPage(const Location& location,

                                 const QString& fileName)

{

    QFile *outFile = new QFile(outputDir() + "/" + fileName);

    if (!outFile->open(QFile::WriteOnly))

	location.fatal(tr("Cannot open output file '%1'")

			.arg(outFile->fileName()));

    QTextStream *out = new QTextStream(outFile);

    out->setCodec("ISO-8859-1");

    outStreamStack.push(out);

}

void PageGenerator::endSubPage()

{

    outStreamStack.top()->flush();

    delete outStreamStack.top()->device();

    delete outStreamStack.pop();

}

QTextStream &PageGenerator::out()

{

    return *outStreamStack.top();

}

/*!

  Recursive writing of html files from the root \a node.

 */

void PageGenerator::generateInnerNode(const InnerNode *node,

                                      CodeMarker *marker)

{

    if (!node->url().isNull())

        return;

    if (node->type() == Node::Fake) {

        const FakeNode *fakeNode = static_cast<const FakeNode *>(node);

        if (fakeNode->subType() == Node::ExternalPage)

            return;

#ifdef QDOC_QML            

        if (fakeNode->subType() == Node::QmlPropertyGroup)

            return;

#endif            

    }

    if (node->parent() != 0) {

	beginSubPage(node->location(), fileName(node));

	if (node->type() == Node::Namespace || node->type() == Node::Class) {

	    generateClassLikeNode(node, marker);

	}

        else if (node->type() == Node::Fake) {

	    generateFakeNode(static_cast<const FakeNode *>(node), marker);

	}

	endSubPage();

    }

    NodeList::ConstIterator c = node->childNodes().begin();

    while (c != node->childNodes().end()) {

	if ((*c)->isInnerNode() && (*c)->access() != Node::Private)

	    generateInnerNode((const InnerNode *) *c, marker);

	++c;

    }

}

QT_END_NAMESPACE