/****************************************************************************
**
** Copyright (C) 2009 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.
**
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** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
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** 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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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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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
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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****************************************************************************/

#include <QMetaObject>
#include <QDebug>
#include "codemarker.h"
#include "config.h"
#include "node.h"

#include <stdio.h>

QT_BEGIN_NAMESPACE

QString CodeMarker::defaultLang;
QList<CodeMarker *> CodeMarker::markers;

/*!
  When a code marker constructs itself, it puts itself into
  the static list of code markers. All the code markers in
  the static list get initialized in initialize(), which is
  not called until after the qdoc configuration file has
  been read.
 */
CodeMarker::CodeMarker()
    : slow(false)
{
    markers.prepend(this);
}

/*!
  When a code marker destroys itself, it removes itself from
  the static list of code markers.
 */
CodeMarker::~CodeMarker()
{
    markers.removeAll(this);
}

/*!
  The only thing a code market initializes is its \e{slow}
  flag. The \e{slow} flag indicates whether the operations
  that slow down qdoc are to be performed or not. It is
  turned off by default. 
 */
void CodeMarker::initializeMarker(const Config &config)
{
    slow = config.getBool(QLatin1String(CONFIG_SLOW));
}

/*!
  Terminating a code marker is trivial.
 */
void CodeMarker::terminateMarker()
{
    // nothing.
}

/*!
  All the code markers in the static list are initialized
  here, after the qdoc configuration file has been loaded.
 */
void CodeMarker::initialize(const Config& config)
{
    defaultLang = config.getString(QLatin1String(CONFIG_LANGUAGE));
    QList<CodeMarker *>::ConstIterator m = markers.begin();
    while (m != markers.end()) {
	(*m)->initializeMarker(config);
	++m;
    }
}

/*!
  All the code markers in the static list are terminated here.
 */
void CodeMarker::terminate()
{
    QList<CodeMarker *>::ConstIterator m = markers.begin();
    while (m != markers.end()) {
	(*m)->terminateMarker();
	++m;
    }
}

CodeMarker *CodeMarker::markerForCode(const QString& code)
{
    CodeMarker *defaultMarker = markerForLanguage(defaultLang);
    if (defaultMarker != 0 && defaultMarker->recognizeCode(code))
	return defaultMarker;

    QList<CodeMarker *>::ConstIterator m = markers.begin();
    while (m != markers.end()) {
	if ((*m)->recognizeCode(code))
	    return *m;
	++m;
    }
    return defaultMarker;
}

CodeMarker *CodeMarker::markerForFileName(const QString& fileName)
{
    CodeMarker *defaultMarker = markerForLanguage(defaultLang);
    int dot = -1;
    while ((dot = fileName.lastIndexOf(QLatin1Char('.'), dot)) != -1) {
	QString ext = fileName.mid(dot + 1);
	if (defaultMarker != 0 && defaultMarker->recognizeExtension(ext))
	    return defaultMarker;
	QList<CodeMarker *>::ConstIterator m = markers.begin();
	while (m != markers.end()) {
	    if ((*m)->recognizeExtension(ext))
		return *m;
	    ++m;
	}
        --dot;
    }
    return defaultMarker;
}

CodeMarker *CodeMarker::markerForLanguage(const QString& lang)
{
    QList<CodeMarker *>::ConstIterator m = markers.begin();
    while (m != markers.end()) {
	if ((*m)->recognizeLanguage(lang))
	    return *m;
	++m;
    }
    return 0;
}

const Node *CodeMarker::nodeForString(const QString& string)
{
    if (sizeof(const Node *) == sizeof(uint)) {
        return reinterpret_cast<const Node *>(string.toUInt());
    }
    else {
        return reinterpret_cast<const Node *>(string.toULongLong());
    }
}

QString CodeMarker::stringForNode(const Node *node)
{
    if (sizeof(const Node *) == sizeof(ulong)) {
        return QString::number(reinterpret_cast<quintptr>(node));
    }
    else {
        return QString::number(reinterpret_cast<qulonglong>(node));
    }
}

static const QString samp  = QLatin1String("&amp;");
static const QString slt   = QLatin1String("&lt;");
static const QString sgt   = QLatin1String("&gt;");
static const QString squot = QLatin1String("&quot;");

QString CodeMarker::protect(const QString& str)
{
    int n = str.length();
    QString marked;
    marked.reserve(n * 2 + 30);
    const QChar *data = str.constData();
    for (int i = 0; i != n; ++i) {
        switch (data[i].unicode()) {
            case '&': marked += samp;  break;
            case '<': marked += slt;   break;
            case '>': marked += sgt;   break;
            case '"': marked += squot; break;
            default : marked += data[i];
        }
    }
    return marked;
}

QString CodeMarker::typified(const QString &string)
{
    QString result;
    QString pendingWord;

    for (int i = 0; i <= string.size(); ++i) {
        QChar ch;
        if (i != string.size())
            ch = string.at(i);

        QChar lower = ch.toLower();
        if ((lower >= QLatin1Char('a') && lower <= QLatin1Char('z'))
            || ch.digitValue() >= 0 || ch == QLatin1Char('_')
                || ch == QLatin1Char(':')) {
            pendingWord += ch;
        }
        else {
            if (!pendingWord.isEmpty()) {
                bool isProbablyType = (pendingWord != QLatin1String("const"));
                if (isProbablyType)
                    result += QLatin1String("<@type>");
                result += pendingWord;
                if (isProbablyType)
                    result += QLatin1String("</@type>");
            }
            pendingWord.clear();

            switch (ch.unicode()) {
            case '\0':
                break;
            case '&':
                result += QLatin1String("&amp;");
                break;
            case '<':
                result += QLatin1String("&lt;");
                break;
            case '>':
                result += QLatin1String("&gt;");
                break;
            default:
                result += ch;
            }
        }
    }
    return result;
}

QString CodeMarker::taggedNode(const Node* node)
{
    QString tag;

    switch (node->type()) {
    case Node::Namespace:
        tag = QLatin1String("@namespace");
        break;
    case Node::Class:
        tag = QLatin1String("@class");
        break;
    case Node::Enum:
        tag = QLatin1String("@enum");
        break;
    case Node::Typedef:
        tag = QLatin1String("@typedef");
        break;
    case Node::Function:
        tag = QLatin1String("@function");
        break;
    case Node::Property:
        tag = QLatin1String("@property");
        break;
    default:
        tag = QLatin1String("@unknown");
        break;
    }
    return QLatin1Char('<') + tag + QLatin1Char('>') + protect(node->name())
        + QLatin1String("</") + tag + QLatin1Char('>');
}

#ifdef QDOC_QML
QString CodeMarker::taggedQmlNode(const Node* node)
{
    QString tag;
    switch (node->type()) {
    case Node::QmlProperty:
        tag = QLatin1String("@property");
        break;
    case Node::QmlSignal:
        tag = QLatin1String("@signal");
        break;
    case Node::QmlMethod:
        tag = QLatin1String("@method");
        break;
    default:
        tag = QLatin1String("@unknown");
        break;
    }
    return QLatin1Char('<') + tag + QLatin1Char('>') + protect(node->name())
        + QLatin1String("</") + tag + QLatin1Char('>');
}
#endif

QString CodeMarker::linkTag(const Node *node, const QString& body)
{
    return QLatin1String("<@link node=\"") + stringForNode(node)
        + QLatin1String("\">") + body + QLatin1String("</@link>");
}

QString CodeMarker::sortName(const Node *node)
{
    QString nodeName = node->name();
    int numDigits = 0;
    for (int i = nodeName.size() - 1; i > 0; --i) {
        if (nodeName.at(i).digitValue() == -1)
            break;
        ++numDigits;
    }

    // we want 'qint8' to appear before 'qint16'
    if (numDigits > 0) {
        for (int i = 0; i < 4 - numDigits; ++i)
            nodeName.insert(nodeName.size()-numDigits-1, QLatin1String("0"));
    }

    if (node->type() == Node::Function) {
        const FunctionNode *func = static_cast<const FunctionNode *>(node);
        QString sortNo;
        if (func->metaness() == FunctionNode::Ctor) {
            sortNo = QLatin1String("C");
        }
        else if (func->metaness() == FunctionNode::Dtor) {
            sortNo = QLatin1String("D");
        }
        else {
            if (nodeName.startsWith(QLatin1String("operator"))
                    && nodeName.length() > 8
                    && !nodeName[8].isLetterOrNumber())
                sortNo = QLatin1String("F");
            else
                sortNo = QLatin1String("E");
        }
        return sortNo + nodeName + QLatin1Char(' ')
             + QString::number(func->overloadNumber(), 36);
    }

    if (node->type() == Node::Class)
        return QLatin1Char('A') + nodeName;

    if (node->type() == Node::Property || node->type() == Node::Variable)
        return QLatin1Char('E') + nodeName;

    return QLatin1Char('B') + nodeName;
}

void CodeMarker::insert(FastSection &fastSection,
                        Node *node,
                        SynopsisStyle style,
                        Status status)
{
    bool irrelevant = false;
    bool inheritedMember = false;
    if (!node->relates()) {
        if (node->parent() != (const InnerNode*)fastSection.innerNode) {
            if (node->type() != Node::QmlProperty)
                inheritedMember = true;
        }
    }

    if (node->access() == Node::Private) {
	irrelevant = true;
    }
    else if (node->type() == Node::Function) {
	FunctionNode *func = (FunctionNode *) node;
	irrelevant = (inheritedMember
		      && (func->metaness() == FunctionNode::Ctor ||
			  func->metaness() == FunctionNode::Dtor));
    }
    else if (node->type() == Node::Class || node->type() == Node::Enum
		    || node->type() == Node::Typedef) {
	irrelevant = (inheritedMember && style != SeparateList);
        if (!irrelevant && style == Detailed && node->type() == Node::Typedef) {
            const TypedefNode* typedeffe = static_cast<const TypedefNode*>(node);
            if (typedeffe->associatedEnum())
                irrelevant = true;
        }
    }

    if (!irrelevant) {
        if (status == Compat) {
            irrelevant = (node->status() != Node::Compat);
	}
        else if (status == Obsolete) {
            irrelevant = (node->status() != Node::Obsolete);
	}
        else {
            irrelevant = (node->status() == Node::Compat ||
                          node->status() == Node::Obsolete);
	}
    }

    if (!irrelevant) {
	if (!inheritedMember || style == SeparateList) {
	    QString key = sortName(node);
            if (!fastSection.memberMap.contains(key))
		fastSection.memberMap.insert(key, node);
	}
        else {
	    if (node->parent()->type() == Node::Class) {
		if (fastSection.inherited.isEmpty()
                    || fastSection.inherited.last().first != node->parent()) {
		    QPair<ClassNode *, int> p((ClassNode *)node->parent(), 0);
		    fastSection.inherited.append(p);
		}
		fastSection.inherited.last().second++;
	    }
	}
    }
}

/*!
  Returns true if \a node represents a reimplemented member function.
  If it is, then it is inserted in the reimplemented member map in the
  section \a fs. And, the test is only performed if \a status is \e OK.
  Otherwise, false is returned.
 */
bool CodeMarker::insertReimpFunc(FastSection& fs, Node* node, Status status)
{
    if (node->access() == Node::Private)
        return false;

    const FunctionNode* fn = static_cast<const FunctionNode*>(node);
    if ((fn->reimplementedFrom() != 0) && (status == Okay)) {
        bool inherited = (!fn->relates() && (fn->parent() != (const InnerNode*)fs.innerNode));
        if (!inherited) {
            QString key = sortName(fn);
            if (!fs.reimpMemberMap.contains(key)) {
                fs.reimpMemberMap.insert(key,node);
                return true;
            }
        }
    }
    return false;
 }

/*!
  If \a fs is not empty, convert it to a Section and append
  the new Section to \a sectionList.
 */
void CodeMarker::append(QList<Section>& sectionList, const FastSection& fs)
{
    if (!fs.isEmpty()) {
	Section section(fs.name,fs.singularMember,fs.pluralMember);
	section.members = fs.memberMap.values();
        section.reimpMembers = fs.reimpMemberMap.values();
	section.inherited = fs.inherited;
	sectionList.append(section);
    }
}

static QString encode(const QString &string)
{
#if 0
    QString result = string;

    for (int i = string.size() - 1; i >= 0; --i) {
        uint ch = string.at(i).unicode();
        if (ch > 0xFF)
            ch = '?';
        if ((ch - '0') >= 10 && (ch - 'a') >= 26 && (ch - 'A') >= 26
            && ch != '/' && ch != '(' && ch != ')' && ch != ',' && ch != '*'
            && ch != '&' && ch != '_' && ch != '<' && ch != '>' && ch != ':'
            && ch != '~')
            result.replace(i, 1, QString("%") + QString("%1").arg(ch, 2, 16));
    }
    return result;
#else
    return string;
#endif
}

QStringList CodeMarker::macRefsForNode(const Node *node)
{
    QString result = QLatin1String("cpp/");
    switch (node->type()) {
    case Node::Class:
        {
            const ClassNode *classe = static_cast<const ClassNode *>(node);
#if 0
            if (!classe->templateStuff().isEmpty()) {
                 result += QLatin1String("tmplt/");
            }
            else
#endif
            {
                 result += QLatin1String("cl/");
            }
            result += macName(classe); // ### Maybe plainName?
        }
        break;
    case Node::Enum:
        {
            QStringList stringList;
            stringList << encode(result + QLatin1String("tag/") +
                                 macName(node));
            foreach (const QString &enumName, node->doc().enumItemNames()) {
                // ### Write a plainEnumValue() and use it here
                stringList << encode(result + QLatin1String("econst/") +
                                     macName(node->parent(), enumName));
            }
            return stringList;
        }
    case Node::Typedef:
        result += QLatin1String("tdef/") + macName(node);
        break;
    case Node::Function:
        {
            bool isMacro = false;
            const FunctionNode *func = static_cast<const FunctionNode *>(node);

            // overloads are too clever for the Xcode documentation browser
            if (func->isOverload()) 
                return QStringList();

            if (func->metaness() == FunctionNode::MacroWithParams
                || func->metaness() == FunctionNode::MacroWithoutParams) {
                result += QLatin1String("macro/");
                isMacro = true;
#if 0
            }
            else if (!func->templateStuff().isEmpty()) {
                result += QLatin1String("ftmplt/");
#endif
            }
            else if (func->isStatic()) {
                result += QLatin1String("clm/");
            }
            else if (!func->parent()->name().isEmpty()) {
                result += QLatin1String("instm/");
            }
            else {
                result += QLatin1String("func/");
            }

            result += macName(func);
            if (result.endsWith(QLatin1String("()")))
                result.chop(2);
#if 0
            // this code is too clever for the Xcode documentation
            // browser and/or pbhelpindexer
            if (!isMacro) {
                result += "/" + QLatin1String(QMetaObject::normalizedSignature(func->returnType().toLatin1().constData())) + "/(";
                const QList<Parameter> &params = func->parameters();
                for (int i = 0; i < params.count(); ++i) {
                    QString type = params.at(i).leftType() +
                        params.at(i).rightType();
                    type = QLatin1String(QMetaObject::normalizedSignature(type.toLatin1().constData()));
                    if (i != 0)
                        result += ",";
                    result += type;
                }
                result += ")";
            }
#endif
        }
        break;
    case Node::Variable:
         result += QLatin1String("data/") + macName(node);
         break;
    case Node::Property:
         {
             NodeList list = static_cast<const PropertyNode*>(node)->functions();
             QStringList stringList;
             foreach (const Node *node, list) {
                stringList += macRefsForNode(node);
             }
             return stringList;
         }
    case Node::Namespace:
    case Node::Fake:
    case Node::Target:
    default:
        return QStringList();
    }

    return QStringList(encode(result));
}

QString CodeMarker::macName(const Node *node, const QString &name)
{
    QString myName = name;
    if (myName.isEmpty()) {
        myName = node->name();
        node = node->parent();
    }

    if (node->name().isEmpty()) {
        return QLatin1Char('/') + protect(myName);
    }
    else {
        return plainFullName(node) + QLatin1Char('/') + protect(myName);
    }
}

#ifdef QDOC_QML
/*!
  Get the list of documentation sections for the children of
  the specified QmlClassNode.
 */
QList<Section> CodeMarker::qmlSections(const QmlClassNode* , SynopsisStyle )
{
    return QList<Section>();
}
#endif

QT_END_NAMESPACE
