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

**

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

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the tools applications of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** 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

** 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 qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

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

/*

  htmlgenerator.cpp

*/

#include "codemarker.h"

#include "codeparser.h"

#include "helpprojectwriter.h"

#include "htmlgenerator.h"

#include "node.h"

#include "separator.h"

#include "tree.h"

#include <ctype.h>

#include <qdebug.h>

#include <qlist.h>

#include <qiterator.h>

#include <qtextcodec.h>

QT_BEGIN_NAMESPACE

#define COMMAND_VERSION                 Doc::alias("version")

int HtmlGenerator::id = 0;

bool HtmlGenerator::debugging_on = false;

#if 0

QString HtmlGenerator::divNavTop = "<div class=\"navTop\"><a href=\"#toc\"><img src=\"./images/bullet_up.png\"></a></div>";

#endif

QString HtmlGenerator::divNavTop = "";

QString HtmlGenerator::sinceTitles[] =

    {

        "    New Namespaces",

        "    New Classes",

        "    New Member Functions",

        "    New Functions in Namespaces",

        "    New Global Functions",

        "    New Macros",

        "    New Enum Types",

        "    New Typedefs",

        "    New Properties",

        "    New Variables",

        "    New QML Elements",

        "    New Qml Properties",

        "    New Qml Signals",

        "    New Qml Methods",

        ""

    };

static bool showBrokenLinks = false;

static QRegExp linkTag("(<@link node=\"([^\"]+)\">).*(</@link>)");

static QRegExp funcTag("(<@func target=\"([^\"]*)\">)(.*)(</@func>)");

static QRegExp typeTag("(<@(type|headerfile|func)(?: +[^>]*)?>)(.*)(</@\\2>)");

static QRegExp spanTag("</@(?:comment|preprocessor|string|char)>");

static QRegExp unknownTag("</?@[^>]*>");

bool parseArg(const QString &src,

              const QString &tag,

              int *pos,

              int n,

              QStringRef *contents,

              QStringRef *par1 = 0,

              bool debug = false)

{

#define SKIP_CHAR(c) \

    if (debug) \

        qDebug() << "looking for " << c << " at " << QString(src.data() + i, n - i); \

    if (i >= n || src[i] != c) { \

        if (debug) \

            qDebug() << " char '" << c << "' not found"; \

        return false; \

    } \

    ++i;

#define SKIP_SPACE \

    while (i < n && src[i] == ' ') \

        ++i;

    int i = *pos;

    int j = i;

    // assume "<@" has been parsed outside

    //SKIP_CHAR('<');

    //SKIP_CHAR('@');

    if (tag != QStringRef(&src, i, tag.length())) {

        if (0 && debug)

            qDebug() << "tag " << tag << " not found at " << i;

        return false;

    }

    if (debug)

        qDebug() << "haystack:" << src << "needle:" << tag << "i:" <<i;

    // skip tag

    i += tag.length();

    // parse stuff like:  linkTag("(<@link node=\"([^\"]+)\">).*(</@link>)");

    if (par1) {

        SKIP_SPACE;

        // read parameter name

        j = i;

        while (i < n && src[i].isLetter())

            ++i;

        if (src[i] == '=') {

            if (debug)

                qDebug() << "read parameter" << QString(src.data() + j, i - j);

            SKIP_CHAR('=');

            SKIP_CHAR('"');

            // skip parameter name

            j = i;

            while (i < n && src[i] != '"')

                ++i;

            *par1 = QStringRef(&src, j, i - j);

            SKIP_CHAR('"');

            SKIP_SPACE;

        } else {

            if (debug)

                qDebug() << "no optional parameter found";

        }

    }

    SKIP_SPACE;

    SKIP_CHAR('>');

    // find contents up to closing "</@tag>

    j = i;

    for (; true; ++i) {

        if (i + 4 + tag.length() > n)

            return false;

        if (src[i] != '<')

            continue;

        if (src[i + 1] != '/')

            continue;

        if (src[i + 2] != '@')

            continue;

        if (tag != QStringRef(&src, i + 3, tag.length()))

            continue;

        if (src[i + 3 + tag.length()] != '>')

            continue;

        break;

    }

    *contents = QStringRef(&src, j, i - j);

    i += tag.length() + 4;

    *pos = i;

    if (debug)

        qDebug() << " tag " << tag << " found: pos now: " << i;

    return true;

#undef SKIP_CHAR

}

static void addLink(const QString &linkTarget,

                    const QStringRef &nestedStuff,

                    QString *res)

{

    if (!linkTarget.isEmpty()) {

        *res += "<a href=\"";

        *res += linkTarget;

        *res += "\">";

        *res += nestedStuff;

        *res += "</a>";

    }

    else {

        *res += nestedStuff;

    }

}

HtmlGenerator::HtmlGenerator()

    : helpProjectWriter(0),

      inLink(false),

      inContents(false),

      inSectionHeading(false),

      inTableHeader(false),

      numTableRows(0),

      threeColumnEnumValueTable(true),

      funcLeftParen("\\S(\\()"),

      myTree(0),

      slow(false),

      obsoleteLinks(false)

{

}

HtmlGenerator::~HtmlGenerator()

{

    if (helpProjectWriter)

        delete helpProjectWriter;

}

void HtmlGenerator::initializeGenerator(const Config &config)

{

    static const struct {

        const char *key;

        const char *left;

        const char *right;

    } defaults[] = {

        { ATOM_FORMATTING_BOLD, "<b>", "</b>" },

        { ATOM_FORMATTING_INDEX, "<!--", "-->" },

        { ATOM_FORMATTING_ITALIC, "<i>", "</i>" },

        { ATOM_FORMATTING_PARAMETER, "<i>", "</i>" },

        { ATOM_FORMATTING_SUBSCRIPT, "<sub>", "</sub>" },

        { ATOM_FORMATTING_SUPERSCRIPT, "<sup>", "</sup>" },

        { ATOM_FORMATTING_TELETYPE, "<tt>", "</tt>" },

        { ATOM_FORMATTING_UNDERLINE, "<u>", "</u>" },

        { 0, 0, 0 }

    };

    Generator::initializeGenerator(config);

    obsoleteLinks = config.getBool(QLatin1String(CONFIG_OBSOLETELINKS));

    setImageFileExtensions(QStringList() << "png" << "jpg" << "jpeg" << "gif");

    int i = 0;

    while (defaults[i].key) {

        formattingLeftMap().insert(defaults[i].key, defaults[i].left);

        formattingRightMap().insert(defaults[i].key, defaults[i].right);

        i++;

    }

    style = config.getString(HtmlGenerator::format() +

                             Config::dot +

                             HTMLGENERATOR_STYLE);

    postHeader = config.getString(HtmlGenerator::format() +

                                  Config::dot +

                                  HTMLGENERATOR_POSTHEADER);

    postPostHeader = config.getString(HtmlGenerator::format() +

                                      Config::dot +

                                      HTMLGENERATOR_POSTPOSTHEADER);

    footer = config.getString(HtmlGenerator::format() +

                              Config::dot +

                              HTMLGENERATOR_FOOTER);

    address = config.getString(HtmlGenerator::format() +

                               Config::dot +

                               HTMLGENERATOR_ADDRESS);

    pleaseGenerateMacRef = config.getBool(HtmlGenerator::format() +

                                          Config::dot +

                                          HTMLGENERATOR_GENERATEMACREFS);

    project = config.getString(CONFIG_PROJECT);

    projectDescription = config.getString(CONFIG_DESCRIPTION);

    if (projectDescription.isEmpty() && !project.isEmpty())

        projectDescription = project + " Reference Documentation";

    projectUrl = config.getString(CONFIG_URL);

    outputEncoding = config.getString(CONFIG_OUTPUTENCODING);

    if (outputEncoding.isEmpty())

        outputEncoding = QLatin1String("ISO-8859-1");

    outputCodec = QTextCodec::codecForName(outputEncoding.toLocal8Bit());

    naturalLanguage = config.getString(CONFIG_NATURALLANGUAGE);

    if (naturalLanguage.isEmpty())

        naturalLanguage = QLatin1String("en");

    QSet<QString> editionNames = config.subVars(CONFIG_EDITION);

    QSet<QString>::ConstIterator edition = editionNames.begin();

    while (edition != editionNames.end()) {

        QString editionName = *edition;

        QStringList editionModules = config.getStringList(CONFIG_EDITION +

                                                          Config::dot +

                                                          editionName +

                                                          Config::dot +

                                                          "modules");

        QStringList editionGroups = config.getStringList(CONFIG_EDITION +

                                                         Config::dot +

                                                         editionName +

                                                         Config::dot +

                                                         "groups");

        if (!editionModules.isEmpty())

            editionModuleMap[editionName] = editionModules;

        if (!editionGroups.isEmpty())

            editionGroupMap[editionName] = editionGroups;

        ++edition;

    }

    slow = config.getBool(CONFIG_SLOW);

    stylesheets = config.getStringList(HtmlGenerator::format() +

                                       Config::dot +

                                       HTMLGENERATOR_STYLESHEETS);

    customHeadElements = config.getStringList(HtmlGenerator::format() +

                                              Config::dot +

                                              HTMLGENERATOR_CUSTOMHEADELEMENTS);

    codeIndent = config.getInt(CONFIG_CODEINDENT);

    helpProjectWriter = new HelpProjectWriter(config,

                                              project.toLower() +

                                              ".qhp");

}

void HtmlGenerator::terminateGenerator()

{

    Generator::terminateGenerator();

}

QString HtmlGenerator::format()

{

    return "HTML";

}

/*!

  This is where the html files and dcf files are written.

  \note The html file generation is done in the base class,

  PageGenerator::generateTree().

 */

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

{

    myTree = tree;

    nonCompatClasses.clear();

    mainClasses.clear();

    compatClasses.clear();

    obsoleteClasses.clear();

    moduleClassMap.clear();

    moduleNamespaceMap.clear();

    funcIndex.clear();

    legaleseTexts.clear();

    serviceClasses.clear();

    findAllClasses(tree->root());

    findAllFunctions(tree->root());

    findAllLegaleseTexts(tree->root());

    findAllNamespaces(tree->root());

    findAllSince(tree->root());

    PageGenerator::generateTree(tree, marker);

    dcfClassesRoot.ref = "classes.html";

    dcfClassesRoot.title = "Classes";

    qSort(dcfClassesRoot.subsections);

    dcfOverviewsRoot.ref = "overviews.html";

    dcfOverviewsRoot.title = "Overviews";

    qSort(dcfOverviewsRoot.subsections);

    dcfExamplesRoot.ref = "examples.html";

    dcfExamplesRoot.title = "Tutorial & Examples";

    qSort(dcfExamplesRoot.subsections);

    DcfSection qtRoot;

    appendDcfSubSection(&qtRoot, dcfClassesRoot);

    appendDcfSubSection(&qtRoot, dcfOverviewsRoot);

    appendDcfSubSection(&qtRoot, dcfExamplesRoot);

    generateDcf(project.toLower().simplified().replace(" ", "-"),

                "index.html",

                projectDescription, qtRoot);

    generateDcf("designer",

                "designer-manual.html",

                "Qt Designer Manual",

                dcfDesignerRoot);

    generateDcf("linguist",

                "linguist-manual.html",

                "Qt Linguist Manual",

                dcfLinguistRoot);

    generateDcf("assistant",

                "assistant-manual.html",

                "Qt Assistant Manual",

                dcfAssistantRoot);

    generateDcf("qmake",

                "qmake-manual.html",

                "qmake Manual",

                dcfQmakeRoot);

    QString fileBase = project.toLower().simplified().replace(" ", "-");

    generateIndex(fileBase, projectUrl, projectDescription);

    generatePageIndex(outputDir() + "/" + fileBase + ".pageindex", marker);

    helpProjectWriter->generate(myTree);

}

void HtmlGenerator::startText(const Node * /* relative */,

                              CodeMarker * /* marker */)

{

    inLink = false;

    inContents = false;

    inSectionHeading = false;

    inTableHeader = false;

    numTableRows = 0;

    threeColumnEnumValueTable = true;

    link.clear();

    sectionNumber.clear();

}

/*!

  Generate html from an instance of Atom.

 */

int HtmlGenerator::generateAtom(const Atom *atom,

                                const Node *relative,

                                CodeMarker *marker)

{

    int skipAhead = 0;

    static bool in_para = false;

    switch (atom->type()) {

    case Atom::AbstractLeft:

        break;

    case Atom::AbstractRight:

        break;

    case Atom::AutoLink:

        if (!inLink && !inContents && !inSectionHeading) {

            const Node *node = 0;

            QString link = getLink(atom, relative, marker, &node);

            if (!link.isEmpty()) {

                beginLink(link, node, relative, marker);

                generateLink(atom, relative, marker);

                endLink();

            }

            else {

                out() << protectEnc(atom->string());

            }

        }

        else {

            out() << protectEnc(atom->string());

        }

        break;

    case Atom::BaseName:

        break;

    case Atom::BriefLeft:

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

            skipAhead = skipAtoms(atom, Atom::BriefRight);

            break;

        }

        out() << "<p>";

        if (relative->type() == Node::Property ||

            relative->type() == Node::Variable) {

            QString str;

            atom = atom->next();

            while (atom != 0 && atom->type() != Atom::BriefRight) {

                if (atom->type() == Atom::String ||

                    atom->type() == Atom::AutoLink)

                    str += atom->string();

                skipAhead++;

                atom = atom->next();

            }

            str[0] = str[0].toLower();

            if (str.right(1) == ".")

                str.truncate(str.length() - 1);

            out() << "This ";

            if (relative->type() == Node::Property)

                out() << "property";

            else

                out() << "variable";

            QStringList words = str.split(" ");

            if (!(words.first() == "contains" || words.first() == "specifies"

                || words.first() == "describes" || words.first() == "defines"

                || words.first() == "holds" || words.first() == "determines"))

                out() << " holds ";

            else

                out() << " ";

            out() << str << ".";

        }

        break;

    case Atom::BriefRight:

        if (relative->type() != Node::Fake)

            out() << "</p>\n";

        break;

    case Atom::C:

        out() << formattingLeftMap()[ATOM_FORMATTING_TELETYPE];

        if (inLink) {

            out() << protectEnc(plainCode(atom->string()));