/****************************************************************************
**
** Copyright (C) 2012 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** 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 met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

/*
  tree.cpp
*/

#include <QDomDocument>

#include "atom.h"
#include "doc.h"
#include "htmlgenerator.h"
#include "location.h"
#include "node.h"
#include "text.h"
#include "tree.h"

#include <limits.h>

QT_BEGIN_NAMESPACE

struct InheritanceBound
{
    Node::Access access;
    QStringList basePath;
    QString dataTypeWithTemplateArgs;
    InnerNode *parent;

    InheritanceBound()
        : access(Node::Public) { }
    InheritanceBound(Node::Access access0,
                     const QStringList& basePath0,
                     const QString &dataTypeWithTemplateArgs0,
                     InnerNode *parent)
	: access(access0), basePath(basePath0),
	  dataTypeWithTemplateArgs(dataTypeWithTemplateArgs0),
          parent(parent) { }
};

struct Target
{
    Node *node;
    Atom *atom;
    int priority;
};

typedef QMap<PropertyNode::FunctionRole, QString> RoleMap;
typedef QMap<PropertyNode *, RoleMap> PropertyMap;
typedef QMultiMap<QString, Node *> GroupMap;
typedef QMultiHash<QString, FakeNode *> FakeNodeHash;
typedef QMultiHash<QString, Target> TargetHash;

class TreePrivate
{
public:
    QMap<ClassNode *, QList<InheritanceBound> > unresolvedInheritanceMap;
    PropertyMap unresolvedPropertyMap;
    GroupMap groupMap;
    QMultiMap<QString, QString> publicGroupMap;
    FakeNodeHash fakeNodesByTitle;
    TargetHash targetHash;
    QList<QPair<ClassNode*,QString> > basesList;
    QList<QPair<FunctionNode*,QString> > relatedList;
};

/*!
  \class Tree
 */

/*!
  The default constructor is the only constructor.
 */
Tree::Tree()
    : roo(0, "")
{
    priv = new TreePrivate;
}

/*!
  The destructor deletes the internal, private tree.
 */
Tree::~Tree()
{
    delete priv;
}

/*!
 */
Node *Tree::findNode(const QStringList &path, Node *relative, int findFlags, const Node* self)
{
    return const_cast<Node*>(const_cast<const Tree*>(this)->findNode(path,
                                                                     relative,
                                                                     findFlags,
                                                                     self));
}

/*!
 */
const Node* Tree::findNode(const QStringList &path,
                           const Node* start,
                           int findFlags,
                           const Node* self) const
{
    const Node* current = start;
    if (!current)
        current = root();

    do {
        const Node *node = current;
        int i;

        for (i = 0; i < path.size(); ++i) {
            if (node == 0 || !node->isInnerNode())
                break;

            const Node *next =
                static_cast<const InnerNode*>(node)->findNode(path.at(i));
            
            if (!next && (findFlags & SearchEnumValues) && i == path.size()-1)
                next = static_cast<const InnerNode*>(node)->findEnumNodeForValue(path.at(i));

            if (!next && node->type() == Node::Class && (findFlags & SearchBaseClasses)) {
                NodeList baseClasses = allBaseClasses(static_cast<const ClassNode *>(node));
                foreach (const Node *baseClass, baseClasses) {
                    next = static_cast<const InnerNode *>(baseClass)->findNode(path.at(i));
                    if (!next && (findFlags & SearchEnumValues) && i == path.size() - 1)
                        next = static_cast<const InnerNode *>(baseClass)
                                        ->findEnumNodeForValue(path.at(i));
                    if (next)
                        break;
                }
            }
            node = next;
        }
        if (node && i == path.size()
                && (!(findFlags & NonFunction) || node->type() != Node::Function
                    || ((FunctionNode *)node)->metaness() == FunctionNode::MacroWithoutParams)) {
            if ((node != self) && (node->subType() != Node::QmlPropertyGroup)) {
                return node;
            }
        }
        current = current->parent();
    } while (current);

    return 0;
}

/*!
  Find the node with the specified \a path name of the
  specified \a type.
 */
Node *Tree::findNode(const QStringList &path,
                     Node::Type type,
                     Node *relative,
                     int findFlags)
{
    return const_cast<Node*>(const_cast<const Tree*>(this)->findNode(path,
                                                                     type,
                                                                     relative,
                                                                     findFlags));
}

/*!
  Find the node with the specified \a path name of the
  specified \a type.
 */
const Node *Tree::findNode(const QStringList &path,
                           Node::Type type,
                           const Node *relative,
                           int findFlags) const
{
    const Node *node = findNode(path, relative, findFlags);
    if (node != 0 && node->type() == type)
        return node;
    return 0;
}

/*!
 */
FunctionNode *Tree::findFunctionNode(const QStringList& path,
                                     Node *relative,
                                     int findFlags)
{
    return const_cast<FunctionNode *>(
                const_cast<const Tree *>(this)->findFunctionNode(path,
                                                                 relative,
                                                                 findFlags));
}

/*!
 */
const FunctionNode *Tree::findFunctionNode(const QStringList &path,
                                           const Node *relative,
                                           int findFlags) const
{
    if (!relative)
        relative = root();

    do {
        const Node *node = relative;
        int i;

        for (i = 0; i < path.size(); ++i) {
            if (node == 0 || !node->isInnerNode())
                break;

            const Node *next;
            if (i == path.size() - 1)
                next = ((InnerNode *) node)->findFunctionNode(path.at(i));
            else
                next = ((InnerNode *) node)->findNode(path.at(i));

            if (!next && node->type() == Node::Class &&
                (findFlags & SearchBaseClasses)) {
                NodeList baseClasses = allBaseClasses(static_cast<const ClassNode *>(node));
                foreach (const Node *baseClass, baseClasses) {
                    if (i == path.size() - 1)
                        next = static_cast<const InnerNode *>(baseClass)->findFunctionNode(path.at(i));
                    else
                        next = static_cast<const InnerNode *>(baseClass)->findNode(path.at(i));

                    if (next)
                        break;
                }
            }

            node = next;
        }
        if (node && i == path.size() && node->isFunction()) {
            // CppCodeParser::processOtherMetaCommand ensures that reimplemented
            // functions are private.
            const FunctionNode *func = static_cast<const FunctionNode*>(node);
            while (func->access() == Node::Private) {
                const FunctionNode *from = func->reimplementedFrom();
                if (from != 0) {
                    if (from->access() != Node::Private)
                        return from;
                    else
                        func = from;
                }
                else
                    break;
            }
            return func;
        }
        relative = relative->parent();
    } while (relative);

    return 0;
}

/*!
 */
FunctionNode *Tree::findFunctionNode(const QStringList &parentPath,
                                     const FunctionNode *clone,
                                     Node *relative,
                                     int findFlags)
{
    return const_cast<FunctionNode *>(
		const_cast<const Tree *>(this)->findFunctionNode(parentPath,
                                                                 clone,
                                      				 relative,
                                                                 findFlags));
}

/*!
 */
const FunctionNode *Tree::findFunctionNode(const QStringList &parentPath,
                                           const FunctionNode *clone,
                                           const Node *relative,
                                           int findFlags) const
{
    const Node *parent = findNode(parentPath, relative, findFlags);
    if (parent == 0 || !parent->isInnerNode()) {
        return 0;
    }
    else {
        return ((InnerNode *)parent)->findFunctionNode(clone);
    }
}

static const int NumSuffixes = 3;
static const char * const suffixes[NumSuffixes] = { "", "s", "es" };

/*!
 */
const FakeNode *Tree::findFakeNodeByTitle(const QString &title) const
{
    for (int pass = 0; pass < NumSuffixes; ++pass) {
        FakeNodeHash::const_iterator i =
                priv->fakeNodesByTitle.find(Doc::canonicalTitle(title + suffixes[pass]));
        if (i != priv->fakeNodesByTitle.constEnd()) {
            FakeNodeHash::const_iterator j = i;
            ++j;
            if (j != priv->fakeNodesByTitle.constEnd() && j.key() == i.key()) {
                QList<Location> internalLocations;
                while (j != priv->fakeNodesByTitle.constEnd()) {
                    if (j.key() == i.key() && j.value()->url().isEmpty())
                        internalLocations.append(j.value()->doc().location());
                    ++j;
                }
                if (internalLocations.size() > 0) {
                    i.value()->doc().location().warning(
                        tr("Page '%1' defined in more than one location:").arg(title));
                    foreach (const Location &location, internalLocations)
                        location.warning(tr("(defined here)"));
                }
            }
            return i.value();
        }
    }
    return 0;
}

/*!
 */
const Node*
Tree::findUnambiguousTarget(const QString &target, Atom *&atom) const
{
    Target bestTarget = {0, 0, INT_MAX};
    int numBestTargets = 0;

    for (int pass = 0; pass < NumSuffixes; ++pass) {
        TargetHash::const_iterator i =
                priv->targetHash.find(Doc::canonicalTitle(target + suffixes[pass]));
        if (i != priv->targetHash.constEnd()) {
            TargetHash::const_iterator j = i;
            do {
                const Target &candidate = j.value();
                if (candidate.priority < bestTarget.priority) {
                    bestTarget = candidate;
                    numBestTargets = 1;
                } else if (candidate.priority == bestTarget.priority) {
                    ++numBestTargets;
                }
                ++j;
            } while (j != priv->targetHash.constEnd() && j.key() == i.key());

            if (numBestTargets == 1) {
                atom = bestTarget.atom;
                return bestTarget.node;
            }
        }
    }
    return 0;
}

/*!
 */
Atom *Tree::findTarget(const QString &target, const Node *node) const
{
    for (int pass = 0; pass < NumSuffixes; ++pass) {
        QString key = Doc::canonicalTitle(target + suffixes[pass]);
        TargetHash::const_iterator i = priv->targetHash.find(key);

        if (i != priv->targetHash.constEnd()) {
            do {
                if (i.value().node == node)
                    return i.value().atom;
                ++i;
            } while (i != priv->targetHash.constEnd() && i.key() == key);
        }
    }
    return 0;
}

/*!
 */
void Tree::addBaseClass(ClassNode *subclass, Node::Access access,
                        const QStringList &basePath,
                        const QString &dataTypeWithTemplateArgs,
                        InnerNode *parent)
{
    priv->unresolvedInheritanceMap[subclass].append(
	    InheritanceBound(access,
                             basePath,
                             dataTypeWithTemplateArgs,
                             parent)
                                                   );
}


/*!
 */
void Tree::addPropertyFunction(PropertyNode *property,
                               const QString &funcName,
                               PropertyNode::FunctionRole funcRole)
{
    priv->unresolvedPropertyMap[property].insert(funcRole, funcName);
}

/*!
  This function adds the \a node to the \a group. The group
  can be listed anywhere using the \e{annotated list} command.
 */
void Tree::addToGroup(Node *node, const QString &group)
{
    priv->groupMap.insert(group, node);
}

/*!
 */
QMultiMap<QString, Node *> Tree::groups() const
{
    return priv->groupMap;
}

/*!
 */
void Tree::addToPublicGroup(Node *node, const QString &group)
{
    priv->publicGroupMap.insert(node->name(), group);
    addToGroup(node, group);
}

/*!
 */
QMultiMap<QString, QString> Tree::publicGroups() const
{
    return priv->publicGroupMap;
}

/*!
 */
void Tree::resolveInheritance(NamespaceNode *rootNode)
{
    if (!rootNode)
        rootNode = root();

    for (int pass = 0; pass < 2; pass++) {
        NodeList::ConstIterator c = rootNode->childNodes().begin();
        while (c != rootNode->childNodes().end()) {
            if ((*c)->type() == Node::Class) {
                resolveInheritance(pass, (ClassNode *) *c);
            }
            else if ((*c)->type() == Node::Namespace) {
                NamespaceNode *ns = static_cast<NamespaceNode*>(*c);
                resolveInheritance(ns);
            }
            ++c;
        }
        if (rootNode == root())
            priv->unresolvedInheritanceMap.clear();
    }
}

/*!
 */
void Tree::resolveProperties()
{
    PropertyMap::ConstIterator propEntry;

    propEntry = priv->unresolvedPropertyMap.begin();
    while (propEntry != priv->unresolvedPropertyMap.end()) {
        PropertyNode *property = propEntry.key();
        InnerNode *parent = property->parent();
        QString getterName = (*propEntry)[PropertyNode::Getter];
        QString setterName = (*propEntry)[PropertyNode::Setter];
        QString resetterName = (*propEntry)[PropertyNode::Resetter];
        QString notifierName = (*propEntry)[PropertyNode::Notifier];

        NodeList::ConstIterator c = parent->childNodes().begin();
        while (c != parent->childNodes().end()) {
            if ((*c)->type() == Node::Function) {
                FunctionNode *function = static_cast<FunctionNode *>(*c);
                if (function->access() == property->access() &&
                    (function->status() == property->status() ||
                     function->doc().isEmpty())) {
                    if (function->name() == getterName) {
                        property->addFunction(function, PropertyNode::Getter);
                    } else if (function->name() == setterName) {
                        property->addFunction(function, PropertyNode::Setter);
                    } else if (function->name() == resetterName) {
                        property->addFunction(function, PropertyNode::Resetter);
                    } else if (function->name() == notifierName) {
                        property->addSignal(function, PropertyNode::Notifier);
                    }
                }
            }
            ++c;
        }
        ++propEntry;
    }

    propEntry = priv->unresolvedPropertyMap.begin();
    while (propEntry != priv->unresolvedPropertyMap.end()) {
        PropertyNode *property = propEntry.key();
        // redo it to set the property functions
        if (property->overriddenFrom())
            property->setOverriddenFrom(property->overriddenFrom());
        ++propEntry;
    }

    priv->unresolvedPropertyMap.clear();
}

/*!
 */
void Tree::resolveInheritance(int pass, ClassNode *classe)
{
    if (pass == 0) {
	QList<InheritanceBound> bounds = priv->unresolvedInheritanceMap[classe];
	QList<InheritanceBound>::ConstIterator b = bounds.begin();
	while (b != bounds.end()) {
	    ClassNode *baseClass = (ClassNode*)findNode((*b).basePath,
                                                        Node::Class);
            if (!baseClass && (*b).parent) {
                baseClass = (ClassNode*)findNode((*b).basePath,
                                                 Node::Class,
                                                 (*b).parent);
            }
	    if (baseClass) {
		classe->addBaseClass((*b).access,
                                     baseClass,
                                     (*b).dataTypeWithTemplateArgs);
            }
	    ++b;
	}
    }
    else {
	NodeList::ConstIterator c = classe->childNodes().begin();
	while (c != classe->childNodes().end()) {
	    if ((*c)->type() == Node::Function) {
		FunctionNode *func = (FunctionNode *) *c;
		FunctionNode *from = findVirtualFunctionInBaseClasses(classe, func);
		if (from != 0) {
		    if (func->virtualness() == FunctionNode::NonVirtual)
			func->setVirtualness(FunctionNode::ImpureVirtual);
		    func->setReimplementedFrom(from);
		}
	    }
            else if ((*c)->type() == Node::Property) {
                fixPropertyUsingBaseClasses(classe, static_cast<PropertyNode *>(*c));
            }
            ++c;
        }
    }
}

/*!
 */
void Tree::resolveGroups()
{
    GroupMap::const_iterator i;
    QString prevGroup;
    for (i = priv->groupMap.constBegin(); i != priv->groupMap.constEnd(); ++i) {
        if (i.value()->access() == Node::Private)
            continue;

        FakeNode *fake =
            static_cast<FakeNode*>(findNode(QStringList(i.key()),Node::Fake));
        if (fake && fake->subType() == Node::Group) {
            fake->addGroupMember(i.value());
        }

        prevGroup = i.key();
    }

    //priv->groupMap.clear();
}

/*!
 */
void Tree::resolveTargets()
{
    // need recursion

    foreach (Node *child, roo.childNodes()) {
        if (child->type() == Node::Fake) {
            FakeNode *node = static_cast<FakeNode *>(child);
            priv->fakeNodesByTitle.insert(Doc::canonicalTitle(node->title()), node);
        }

        if (child->doc().hasTableOfContents()) {
            const QList<Atom *> &toc = child->doc().tableOfContents();
            Target target;
            target.node = child;
            target.priority = 3;

            for (int i = 0; i < toc.size(); ++i) {
                target.atom = toc.at(i);
                QString title = Text::sectionHeading(target.atom).toString();
                if (!title.isEmpty())
                    priv->targetHash.insert(Doc::canonicalTitle(title), target);
            }
        }
        if (child->doc().hasKeywords()) {
            const QList<Atom *> &keywords = child->doc().keywords();
            Target target;
            target.node = child;
            target.priority = 1;

            for (int i = 0; i < keywords.size(); ++i) {
                target.atom = keywords.at(i);
                priv->targetHash.insert(Doc::canonicalTitle(target.atom->string()), target);
            }
        }
        if (child->doc().hasTargets()) {
            const QList<Atom *> &toc = child->doc().targets();
            Target target;
            target.node = child;
            target.priority = 2;

            for (int i = 0; i < toc.size(); ++i) {
                target.atom = toc.at(i);
                priv->targetHash.insert(Doc::canonicalTitle(target.atom->string()), target);
            }
        }
    }
}

/*!
 */
void Tree::fixInheritance(NamespaceNode *rootNode)
{
    if (!rootNode)
        rootNode = root();

    NodeList::ConstIterator c = rootNode->childNodes().begin();
    while (c != rootNode->childNodes().end()) {
        if ((*c)->type() == Node::Class)
            static_cast<ClassNode *>(*c)->fixBaseClasses();
        else if ((*c)->type() == Node::Namespace) {
            NamespaceNode *ns = static_cast<NamespaceNode*>(*c);
            fixInheritance(ns);
        }
        ++c;
    }
}

/*!
 */
FunctionNode *Tree::findVirtualFunctionInBaseClasses(ClassNode *classe,
                                                     FunctionNode *clone)
{
    QList<RelatedClass>::ConstIterator r = classe->baseClasses().begin();
    while (r != classe->baseClasses().end()) {
        FunctionNode *func;
        if (((func = findVirtualFunctionInBaseClasses((*r).node, clone)) != 0 ||
              (func = (*r).node->findFunctionNode(clone)) != 0)) {
            if (func->virtualness() != FunctionNode::NonVirtual)
                return func;
        }
         ++r;
    }
    return 0;
}

/*!
 */
void Tree::fixPropertyUsingBaseClasses(ClassNode *classe,
                                       PropertyNode *property)
{
    QList<RelatedClass>::const_iterator r = classe->baseClasses().begin();
    while (r != classe->baseClasses().end()) {
	PropertyNode *baseProperty =
            static_cast<PropertyNode *>(r->node->findNode(property->name(),
                                                          Node::Property));
        if (baseProperty) {
            fixPropertyUsingBaseClasses(r->node, baseProperty);
            property->setOverriddenFrom(baseProperty);
        }
        else {
            fixPropertyUsingBaseClasses(r->node, property);
        }
         ++r;
    }
}

/*!
 */
NodeList Tree::allBaseClasses(const ClassNode *classe) const
{
    NodeList result;
    foreach (const RelatedClass &r, classe->baseClasses()) {
        result += r.node;
        result += allBaseClasses(r.node);
    }
    return result;
}

/*!
 */
void Tree::readIndexes(const QStringList &indexFiles)
{
    foreach (const QString &indexFile, indexFiles)
        readIndexFile(indexFile);
}

/*!
  Read the QDomDocument at \a path and get the index from it.
 */
void Tree::readIndexFile(const QString &path)
{
    QFile file(path);
    if (file.open(QFile::ReadOnly)) {
        QDomDocument document;
        document.setContent(&file);
        file.close();

        QDomElement indexElement = document.documentElement();
        QString indexUrl = indexElement.attribute("url", "");
        priv->basesList.clear();
        priv->relatedList.clear();

        // Scan all elements in the XML file, constructing a map that contains
        // base classes for each class found.

        QDomElement child = indexElement.firstChildElement();
        while (!child.isNull()) {
            readIndexSection(child, root(), indexUrl);
            child = child.nextSiblingElement();
        }

        // Now that all the base classes have been found for this index,
        // arrange them into an inheritance hierarchy.

        resolveIndex();
    }
}

/*!
 */
void Tree::readIndexSection(const QDomElement &element,
                            InnerNode *parent,
                            const QString &indexUrl)
{
    QString name = element.attribute("name");
    QString href = element.attribute("href");

    Node *section;
    Location location;

    if (element.nodeName() == "namespace") {
        section = new NamespaceNode(parent, name);

        if (!indexUrl.isEmpty())
            location = Location(indexUrl + "/" + name.toLower() + ".html");
        else if (!indexUrl.isNull())
            location = Location(name.toLower() + ".html");

    }
    else if (element.nodeName() == "class") {
        section = new ClassNode(parent, name);
        priv->basesList.append(QPair<ClassNode*,QString>(
            static_cast<ClassNode*>(section), element.attribute("bases")));

        if (!indexUrl.isEmpty())
            location = Location(indexUrl + "/" + name.toLower() + ".html");
        else if (!indexUrl.isNull())
            location = Location(name.toLower() + ".html");

    }
    else if (element.nodeName() == "page") {
        Node::SubType subtype;
        if (element.attribute("subtype") == "example")
            subtype = Node::Example;
        else if (element.attribute("subtype") == "header")
            subtype = Node::HeaderFile;
        else if (element.attribute("subtype") == "file")
            subtype = Node::File;
        else if (element.attribute("subtype") == "group")
            subtype = Node::Group;
        else if (element.attribute("subtype") == "module")
            subtype = Node::Module;
        else if (element.attribute("subtype") == "page")
            subtype = Node::Page;
        else if (element.attribute("subtype") == "externalpage")
            subtype = Node::ExternalPage;
        else if (element.attribute("subtype") == "qmlclass")
            subtype = Node::QmlClass;
        else if (element.attribute("subtype") == "qmlpropertygroup")
            subtype = Node::QmlPropertyGroup;
        else if (element.attribute("subtype") == "qmlbasictype")
            subtype = Node::QmlBasicType;
        else
            return;

        FakeNode *fakeNode = new FakeNode(parent, name, subtype);
        fakeNode->setTitle(element.attribute("title"));

        if (element.hasAttribute("location"))
            name = element.attribute("location", "");

        if (!indexUrl.isEmpty())
            location = Location(indexUrl + "/" + name);
        else if (!indexUrl.isNull())
            location = Location(name);

        section = fakeNode;

    }
    else if (element.nodeName() == "enum") {
        EnumNode *enumNode = new EnumNode(parent, name);

        if (!indexUrl.isEmpty())
            location =
                Location(indexUrl + "/" + parent->name().toLower() + ".html");
        else if (!indexUrl.isNull())
            location = Location(parent->name().toLower() + ".html");

        QDomElement child = element.firstChildElement("value");
        while (!child.isNull()) {
            EnumItem item(child.attribute("name"), child.attribute("value"));
            enumNode->addItem(item);
            child = child.nextSiblingElement("value");
        }

        section = enumNode;

    } else if (element.nodeName() == "typedef") {
        section = new TypedefNode(parent, name);

        if (!indexUrl.isEmpty())
            location =
                Location(indexUrl + "/" + parent->name().toLower() + ".html");
        else if (!indexUrl.isNull())
            location = Location(parent->name().toLower() + ".html");

    }
    else if (element.nodeName() == "property") {
        section = new PropertyNode(parent, name);

        if (!indexUrl.isEmpty())
            location =
                Location(indexUrl + "/" + parent->name().toLower() + ".html");
        else if (!indexUrl.isNull())
            location = Location(parent->name().toLower() + ".html");

    } else if (element.nodeName() == "function") {
        FunctionNode::Virtualness virt;
        if (element.attribute("virtual") == "non")
            virt = FunctionNode::NonVirtual;
        else if (element.attribute("virtual") == "impure")
            virt = FunctionNode::ImpureVirtual;
        else if (element.attribute("virtual") == "pure")
            virt = FunctionNode::PureVirtual;
        else
            return;

        FunctionNode::Metaness meta;
        if (element.attribute("meta") == "plain")
            meta = FunctionNode::Plain;
        else if (element.attribute("meta") == "signal")
            meta = FunctionNode::Signal;
        else if (element.attribute("meta") == "slot")
            meta = FunctionNode::Slot;
        else if (element.attribute("meta") == "constructor")
            meta = FunctionNode::Ctor;
        else if (element.attribute("meta") == "destructor")
            meta = FunctionNode::Dtor;
        else if (element.attribute("meta") == "macro")
            meta = FunctionNode::MacroWithParams;
        else if (element.attribute("meta") == "macrowithparams")
            meta = FunctionNode::MacroWithParams;
        else if (element.attribute("meta") == "macrowithoutparams")
            meta = FunctionNode::MacroWithoutParams;
        else
            return;

        FunctionNode *functionNode = new FunctionNode(parent, name);
        functionNode->setReturnType(element.attribute("return"));
        functionNode->setVirtualness(virt);
        functionNode->setMetaness(meta);
        functionNode->setConst(element.attribute("const") == "true");
        functionNode->setStatic(element.attribute("static") == "true");
        functionNode->setOverload(element.attribute("overload") == "true");

        if (element.hasAttribute("relates")
            && element.attribute("relates") != parent->name()) {
            priv->relatedList.append(
                QPair<FunctionNode*,QString>(functionNode,
                                             element.attribute("relates")));
        }

        QDomElement child = element.firstChildElement("parameter");
        while (!child.isNull()) {
            // Do not use the default value for the parameter; it is not
            // required, and has been known to cause problems.
            Parameter parameter(child.attribute("left"),
                                child.attribute("right"),
                                child.attribute("name"),
                                ""); // child.attribute("default")
            functionNode->addParameter(parameter);
            child = child.nextSiblingElement("parameter");
        }

        section = functionNode;

        if (!indexUrl.isEmpty())
            location =
                Location(indexUrl + "/" + parent->name().toLower() + ".html");
        else if (!indexUrl.isNull())
            location = Location(parent->name().toLower() + ".html");

    }
    else if (element.nodeName() == "variable") {
        section = new VariableNode(parent, name);

        if (!indexUrl.isEmpty())
            location = Location(indexUrl + "/" + parent->name().toLower() + ".html");
        else if (!indexUrl.isNull())
            location = Location(parent->name().toLower() + ".html");

    }
    else if (element.nodeName() == "keyword") {
        Target target;
        target.node = parent;
        target.priority = 1;
        target.atom = new Atom(Atom::Target, name);
        priv->targetHash.insert(name, target);
        return;

    }
    else if (element.nodeName() == "target") {
        Target target;
        target.node = parent;
        target.priority = 2;
        target.atom = new Atom(Atom::Target, name);
        priv->targetHash.insert(name, target);
        return;

    }
    else if (element.nodeName() == "contents") {
        Target target;
        target.node = parent;
        target.priority = 3;
        target.atom = new Atom(Atom::Target, name);
        priv->targetHash.insert(name, target);
        return;

    }
    else
        return;

    QString access = element.attribute("access");
    if (access == "public")
        section->setAccess(Node::Public);
    else if (access == "protected")
        section->setAccess(Node::Protected);
    else if (access == "private")
        section->setAccess(Node::Private);
    else
        section->setAccess(Node::Public);

    if (element.nodeName() != "page") {
        QString threadSafety = element.attribute("threadsafety");
        if (threadSafety == "non-reentrant")
            section->setThreadSafeness(Node::NonReentrant);
        else if (threadSafety == "reentrant")
            section->setThreadSafeness(Node::Reentrant);
        else if (threadSafety == "thread safe")
            section->setThreadSafeness(Node::ThreadSafe);
        else
            section->setThreadSafeness(Node::UnspecifiedSafeness);
    }
    else
        section->setThreadSafeness(Node::UnspecifiedSafeness);

    QString status = element.attribute("status");
    if (status == "compat")
        section->setStatus(Node::Compat);
    else if (status == "obsolete")
        section->setStatus(Node::Obsolete);
    else if (status == "deprecated")
        section->setStatus(Node::Deprecated);
    else if (status == "preliminary")
        section->setStatus(Node::Preliminary);
    else if (status == "commendable")
        section->setStatus(Node::Commendable);
    else if (status == "internal")
        section->setStatus(Node::Internal);
    else if (status == "main")
        section->setStatus(Node::Main);
    else
        section->setStatus(Node::Commendable);

    section->setModuleName(element.attribute("module"));
    if (!indexUrl.isEmpty()) {
        if (indexUrl.startsWith("."))
            section->setUrl(href);
        else
            section->setUrl(indexUrl + "/" + href);
    }

    // Create some content for the node.
    QSet<QString> emptySet;

    Doc doc(location, location, " ", emptySet); // placeholder
    section->setDoc(doc);

    if (section->isInnerNode()) {
        InnerNode *inner = static_cast<InnerNode*>(section);
        if (inner) {
            QDomElement child = element.firstChildElement();

            while (!child.isNull()) {
                if (element.nodeName() == "class")
                    readIndexSection(child, inner, indexUrl);
                else if (element.nodeName() == "page")
                    readIndexSection(child, inner, indexUrl);
                else if (element.nodeName() == "namespace" && !name.isEmpty())
                    // The root node in the index is a namespace with an empty name.
                    readIndexSection(child, inner, indexUrl);
                else
                    readIndexSection(child, parent, indexUrl);

                child = child.nextSiblingElement();
            }
        }
    }
}

/*!
 */
QString Tree::readIndexText(const QDomElement &element)
{
    QString text;
    QDomNode child = element.firstChild();
    while (!child.isNull()) {
        if (child.isText())
            text += child.toText().nodeValue();
        child = child.nextSibling();
    }
    return text;
}

/*!
 */
void Tree::resolveIndex()
{
    QPair<ClassNode*,QString> pair;

    foreach (pair, priv->basesList) {
        foreach (const QString &base, pair.second.split(",")) {
            Node *baseClass = root()->findNode(base, Node::Class);
            if (baseClass) {
                pair.first->addBaseClass(Node::Public,
                                         static_cast<ClassNode*>(baseClass));
            }
        }
    }

    QPair<FunctionNode*,QString> relatedPair;

    foreach (relatedPair, priv->relatedList) {
        Node *classNode = root()->findNode(relatedPair.second, Node::Class);
        if (classNode)
            relatedPair.first->setRelates(static_cast<ClassNode*>(classNode));
    }
}

/*!
  Generate the index section with the given \a writer for the \a node
  specified, returning true if an element was written; otherwise returns
  false.
 */
bool Tree::generateIndexSection(QXmlStreamWriter &writer,
                                const Node *node,
                                bool generateInternalNodes) const
{
    if (!node->url().isEmpty())
        return false;

    QString nodeName;
    switch (node->type()) {
        case Node::Namespace:
            nodeName = "namespace";
            break;
        case Node::Class:
            nodeName = "class";
            break;
        case Node::Fake:
            nodeName = "page";
            break;
        case Node::Enum:
            nodeName = "enum";
            break;
        case Node::Typedef:
            nodeName = "typedef";
            break;
        case Node::Property:
            nodeName = "property";
            break;
        case Node::Function:
            nodeName = "function";
            break;
        case Node::Variable:
            nodeName = "variable";
            break;
        case Node::Target:
            nodeName = "target";
            break;
        case Node::QmlProperty:
            nodeName = "qmlproperty";
            break;
        case Node::QmlSignal:
            nodeName = "qmlsignal";
            break;
        case Node::QmlMethod:
            nodeName = "qmlmethod";
            break;
        default:
            return false;
    }

    QString access;
    switch (node->access()) {
        case Node::Public:
            access = "public";
            break;
        case Node::Protected:
            access = "protected";
            break;
        case Node::Private:
            // Do not include private non-internal nodes in the index.
            // (Internal public and protected nodes are marked as private
            // by qdoc. We can check their internal status to determine
            // whether they were really private to begin with.)
            if (node->status() == Node::Internal && generateInternalNodes)
                access = "internal";
            else
                return false;
            break;
        default:
            return false;
    }

    QString objName = node->name();

    // Special case: only the root node should have an empty name.
    if (objName.isEmpty() && node != root())
        return false;

    writer.writeStartElement(nodeName);

    QXmlStreamAttributes attributes;
    writer.writeAttribute("access", access);

    if (node->type() != Node::Fake) {
        QString threadSafety;
        switch (node->threadSafeness()) {
            case Node::NonReentrant:
                threadSafety = "non-reentrant";
                break;
            case Node::Reentrant:
                threadSafety = "reentrant";
                break;
            case Node::ThreadSafe:
                threadSafety = "thread safe";
                break;
            case Node::UnspecifiedSafeness:
            default:
                threadSafety = "unspecified";
                break;
        }
        writer.writeAttribute("threadsafety", threadSafety);
    }

    QString status;
    switch (node->status()) {
        case Node::Compat:
            status = "compat";
            break;
        case Node::Obsolete:
            status = "obsolete";
            break;
        case Node::Deprecated:
            status = "deprecated";
            break;
        case Node::Preliminary:
            status = "preliminary";
            break;
        case Node::Commendable:
            status = "commendable";
            break;
        case Node::Internal:
            status = "internal";
            break;
        case Node::Main:
        default:
            status = "main";
            break;
    }
    writer.writeAttribute("status", status);

    writer.writeAttribute("name", objName);
    QString fullName = fullDocumentName(node);
    if (fullName != objName)
        writer.writeAttribute("fullname", fullName);
    writer.writeAttribute("href", HtmlGenerator::fullDocumentLocation(node));
    if ((node->type() != Node::Fake) && (!node->isQmlNode()))
        writer.writeAttribute("location", node->location().fileName());

    switch (node->type()) {

    case Node::Class:
        {
            // Classes contain information about their base classes.

            const ClassNode *classNode = static_cast<const ClassNode*>(node);
            QList<RelatedClass> bases = classNode->baseClasses();
            QSet<QString> baseStrings;
            foreach (const RelatedClass &related, bases) {
                ClassNode *baseClassNode = related.node;
                baseStrings.insert(baseClassNode->name());
            }
            writer.writeAttribute("bases", QStringList(baseStrings.toList()).join(","));
            writer.writeAttribute("module", node->moduleName());
        }
        break;

    case Node::Namespace:
        writer.writeAttribute("module", node->moduleName());
        break;

    case Node::Fake:
        {
            /*
              Fake nodes (such as manual pages) contain subtypes,
              titles and other attributes.
            */

            const FakeNode *fakeNode = static_cast<const FakeNode*>(node);
            switch (fakeNode->subType()) {
                case Node::Example:
                    writer.writeAttribute("subtype", "example");
                    break;
                case Node::HeaderFile:
                    writer.writeAttribute("subtype", "header");
                    break;
                case Node::File:
                    writer.writeAttribute("subtype", "file");
                    break;
                case Node::Group:
                    writer.writeAttribute("subtype", "group");
                    break;
                case Node::Module:
                    writer.writeAttribute("subtype", "module");
                    break;
                case Node::Page:
                    writer.writeAttribute("subtype", "page");
                    break;
                case Node::ExternalPage:
                    writer.writeAttribute("subtype", "externalpage");
                    break;
                case Node::QmlClass:
                    writer.writeAttribute("subtype", "qmlclass");
                    break;
                case Node::QmlBasicType:
                    writer.writeAttribute("subtype", "qmlbasictype");
                    break;
                default:
                    break;
            }
            writer.writeAttribute("title", fakeNode->title());
            writer.writeAttribute("fulltitle", fakeNode->fullTitle());
            writer.writeAttribute("subtitle", fakeNode->subTitle());
            writer.writeAttribute("location", fakeNode->doc().location().fileName());
        }
        break;

    case Node::Function:
        {
            /*
              Function nodes contain information about the type of
              function being described.
            */

            const FunctionNode *functionNode =
                static_cast<const FunctionNode*>(node);

            switch (functionNode->virtualness()) {
                case FunctionNode::NonVirtual:
                    writer.writeAttribute("virtual", "non");
                    break;
                case FunctionNode::ImpureVirtual:
                    writer.writeAttribute("virtual", "impure");
                    break;
                case FunctionNode::PureVirtual:
                    writer.writeAttribute("virtual", "pure");
                    break;
                default:
                    break;
            }
            switch (functionNode->metaness()) {
                case FunctionNode::Plain:
                    writer.writeAttribute("meta", "plain");
                    break;
                case FunctionNode::Signal:
                    writer.writeAttribute("meta", "signal");
                    break;
                case FunctionNode::Slot:
                    writer.writeAttribute("meta", "slot");
                    break;
                case FunctionNode::Ctor:
                    writer.writeAttribute("meta", "constructor");
                    break;
                case FunctionNode::Dtor:
                    writer.writeAttribute("meta", "destructor");
                    break;
                case FunctionNode::MacroWithParams:
                    writer.writeAttribute("meta", "macrowithparams");
                    break;
                case FunctionNode::MacroWithoutParams:
                    writer.writeAttribute("meta", "macrowithoutparams");
                    break;
                default:
                    break;
            }
            writer.writeAttribute("const", functionNode->isConst()?"true":"false");
            writer.writeAttribute("static", functionNode->isStatic()?"true":"false");
            writer.writeAttribute("overload", functionNode->isOverload()?"true":"false");
            if (functionNode->isOverload())
                writer.writeAttribute("overload-number", QString::number(functionNode->overloadNumber()));
            if (functionNode->relates())
                writer.writeAttribute("relates", functionNode->relates()->name());
            const PropertyNode *propertyNode = functionNode->associatedProperty();
            if (propertyNode)
                writer.writeAttribute("associated-property", propertyNode->name());
            writer.writeAttribute("type", functionNode->returnType());
        }
        break;

    case Node::QmlProperty:
        {
            const QmlPropertyNode *qpn = static_cast<const QmlPropertyNode*>(node);
            writer.writeAttribute("type", qpn->dataType());
            writer.writeAttribute("attached", qpn->isAttached() ? "true" : "false");
            writer.writeAttribute("writable", qpn->isWritable(this) ? "true" : "false");
        }
        break;
    case Node::Property:
        {
            const PropertyNode *propertyNode = static_cast<const PropertyNode*>(node);
            writer.writeAttribute("type", propertyNode->dataType());
            foreach (const Node *fnNode, propertyNode->getters()) {
                if (fnNode) {
                    const FunctionNode *functionNode = static_cast<const FunctionNode*>(fnNode);
                    writer.writeStartElement("getter");
                    writer.writeAttribute("name", functionNode->name());
                    writer.writeEndElement(); // getter
                }
            }
            foreach (const Node *fnNode, propertyNode->setters()) {
                if (fnNode) {
                    const FunctionNode *functionNode = static_cast<const FunctionNode*>(fnNode);
                    writer.writeStartElement("setter");
                    writer.writeAttribute("name", functionNode->name());
                    writer.writeEndElement(); // getter
                }
            }
            foreach (const Node *fnNode, propertyNode->resetters()) {
                if (fnNode) {
                    const FunctionNode *functionNode = static_cast<const FunctionNode*>(fnNode);
                    writer.writeStartElement("resetter");
                    writer.writeAttribute("name", functionNode->name());
                    writer.writeEndElement(); // getter
                }
            }
        }
        break;

    case Node::Variable:
        {
            const VariableNode *variableNode =
                static_cast<const VariableNode*>(node);
            writer.writeAttribute("type", variableNode->dataType());
            writer.writeAttribute("static",
                                  variableNode->isStatic() ? "true" : "false");
        }
        break;
    default:
        break;
    }

    // Inner nodes and function nodes contain child nodes of some sort, either
    // actual child nodes or function parameters. For these, we close the
    // opening tag, create child elements, then add a closing tag for the
    // element. Elements for all other nodes are closed in the opening tag.

    if (node->isInnerNode()) {

        const InnerNode *inner = static_cast<const InnerNode*>(node);

        // For internal pages, we canonicalize the target, keyword and content
        // item names so that they can be used by qdoc for other sets of
        // documentation.
        // The reason we do this here is that we don't want to ruin
        // externally composed indexes, containing non-qdoc-style target names
        // when reading in indexes.

        if (inner->doc().hasTargets()) {
            bool external = false;
            if (inner->type() == Node::Fake) {
                const FakeNode *fakeNode = static_cast<const FakeNode *>(inner);
                if (fakeNode->subType() == Node::ExternalPage)
                    external = true;
            }

            foreach (const Atom *target, inner->doc().targets()) {
                QString targetName = target->string();
                if (!external)
                    targetName = Doc::canonicalTitle(targetName);

                writer.writeStartElement("target");
                writer.writeAttribute("name", targetName);
                writer.writeEndElement(); // target
            }
        }
        if (inner->doc().hasKeywords()) {
            foreach (const Atom *keyword, inner->doc().keywords()) {
                writer.writeStartElement("keyword");
                writer.writeAttribute("name",
                                      Doc::canonicalTitle(keyword->string()));
                writer.writeEndElement(); // keyword
            }
        }
        if (inner->doc().hasTableOfContents()) {
            for (int i = 0; i < inner->doc().tableOfContents().size(); ++i) {
                Atom *item = inner->doc().tableOfContents()[i];
                int level = inner->doc().tableOfContentsLevels()[i];

                QString title = Text::sectionHeading(item).toString();
                writer.writeStartElement("contents");
                writer.writeAttribute("name", Doc::canonicalTitle(title));
                writer.writeAttribute("title", title);
                writer.writeAttribute("level", QString::number(level));
                writer.writeEndElement(); // contents
            }
        }

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

        const FunctionNode *functionNode = static_cast<const FunctionNode*>(node);
        // Write a signature attribute for convenience.
        QStringList signatureList;
        QStringList resolvedParameters;

        foreach (const Parameter &parameter, functionNode->parameters()) {
            QString leftType = parameter.leftType();
            const Node *leftNode =
                const_cast<Tree*>(this)->findNode(parameter.leftType().split("::"),
                Node::Typedef, 0, SearchBaseClasses|NonFunction);
            if (!leftNode) {
                leftNode = const_cast<Tree *>(this)->findNode(
                    parameter.leftType().split("::"), Node::Typedef,
                    node->parent(), SearchBaseClasses|NonFunction);
            }
            if (leftNode) {
                if (leftNode->type() == Node::Typedef) {
                    const TypedefNode *typedefNode =
                        static_cast<const TypedefNode *>(leftNode);
                    if (typedefNode->associatedEnum()) {
                        leftType = "QFlags<"+fullDocumentName(typedefNode->associatedEnum())+">";
                    }
                }
                else
                    leftType = fullDocumentName(leftNode);
            }
            resolvedParameters.append(leftType);
            signatureList.append(leftType + " " + parameter.name());
        }

        QString signature = functionNode->name()+"("+signatureList.join(", ")+")";
        if (functionNode->isConst())
            signature += " const";
        writer.writeAttribute("signature", signature);

        for (int i = 0; i < functionNode->parameters().size(); ++i) {
            Parameter parameter = functionNode->parameters()[i];
            writer.writeStartElement("parameter");
            writer.writeAttribute("left", resolvedParameters[i]);
            writer.writeAttribute("right", parameter.rightType());
            writer.writeAttribute("name", parameter.name());
            writer.writeAttribute("default", parameter.defaultValue());
            writer.writeEndElement(); // parameter
        }

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

        const EnumNode *enumNode = static_cast<const EnumNode*>(node);
        if (enumNode->flagsType()) {
            writer.writeAttribute("typedef",
                fullDocumentName(enumNode->flagsType()));
        }
        foreach (const EnumItem &item, enumNode->items()) {
            writer.writeStartElement("value");
            writer.writeAttribute("name", item.name());
            writer.writeAttribute("value", item.value());
            writer.writeEndElement(); // value
        }

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

        const TypedefNode *typedefNode = static_cast<const TypedefNode*>(node);
        if (typedefNode->associatedEnum()) {
            writer.writeAttribute("enum",
                fullDocumentName(typedefNode->associatedEnum()));
        }
    }

    return true;
}


/*!
    Returns true if the node \a n1 is less than node \a n2.
    The comparison is performed by comparing properties of the nodes in order
    of increasing complexity.
*/
bool compareNodes(const Node *n1, const Node *n2)
{
    // Private nodes can occur in any order since they won't normally be
    // written to the index.
    if (n1->access() == Node::Private && n2->access() == Node::Private)
        return true;

    if (n1->location().filePath() < n2->location().filePath())
        return true;
    else if (n1->location().filePath() > n2->location().filePath())
        return false;

    if (n1->type() < n2->type())
        return true;
    else if (n1->type() > n2->type())
        return false;

    if (n1->name() < n2->name())
        return true;
    else if (n1->name() > n2->name())
        return false;

    if (n1->access() < n2->access())
        return true;
    else if (n1->access() > n2->access())
        return false;

    if (n1->type() == Node::Function && n2->type() == Node::Function) {
        const FunctionNode *f1 = static_cast<const FunctionNode *>(n1);
        const FunctionNode *f2 = static_cast<const FunctionNode *>(n2);

        if (f1->isConst() < f2->isConst())
            return true;
        else if (f1->isConst() > f2->isConst())
            return false;

        if (f1->signature() < f2->signature())
            return true;
        else if (f1->signature() > f2->signature())
            return false;
    }

    if (n1->type() == Node::Fake && n2->type() == Node::Fake) {
        const FakeNode *f1 = static_cast<const FakeNode *>(n1);
        const FakeNode *f2 = static_cast<const FakeNode *>(n2);
        if (f1->fullTitle() < f2->fullTitle())
            return true;
        else if (f1->fullTitle() > f2->fullTitle())
            return false;
    }

    return false;
}

/*!
    Generate index sections for the child nodes of the given \a node
    using the \a writer specified. If \a generateInternalNodes is true,
    nodes marked as internal will be included in the index; otherwise,
    they will be omitted.
*/
void Tree::generateIndexSections(QXmlStreamWriter &writer,
                                 const Node *node,
                                 bool generateInternalNodes) const
{
    if (generateIndexSection(writer, node, generateInternalNodes)) {

        if (node->isInnerNode()) {
            const InnerNode *inner = static_cast<const InnerNode *>(node);

            NodeList cnodes = inner->childNodes();
            qSort(cnodes.begin(), cnodes.end(), compareNodes);

            foreach (const Node *child, cnodes) {
                /*
                  Don't generate anything for a QML property group node.
                  It is just a place holder for a collection of QML property
                  nodes. Recurse to its children, which are the QML property
                  nodes.
                 */
                if (child->subType() == Node::QmlPropertyGroup) {
                    const InnerNode *pgn = static_cast<const InnerNode*>(child);
                    foreach (const Node *c, pgn->childNodes()) {
                        generateIndexSections(writer, c, generateInternalNodes);
                    }
                }
                else
                    generateIndexSections(writer, child, generateInternalNodes);
            }

/*
            foreach (const Node *child, inner->relatedNodes()) {
                QDomElement childElement = generateIndexSections(document, child);
                element.appendChild(childElement);
            }
*/
        }
        writer.writeEndElement();
    }
}

/*!
  Outputs an index file.
 */
void Tree::generateIndex(const QString &fileName,
                         const QString &url,
                         const QString &title,
                         bool generateInternalNodes) const
{
    QFile file(fileName);
    if (!file.open(QFile::WriteOnly | QFile::Text))
        return ;

    QXmlStreamWriter writer(&file);
    writer.setAutoFormatting(true);
    writer.writeStartDocument();
    writer.writeDTD("<!DOCTYPE QDOCINDEX>");

    writer.writeStartElement("INDEX");
    writer.writeAttribute("url", url);
    writer.writeAttribute("title", title);
    writer.writeAttribute("version", version());

    generateIndexSections(writer, root(), generateInternalNodes);

    writer.writeEndElement(); // INDEX
    writer.writeEndElement(); // QDOCINDEX
    writer.writeEndDocument();
    file.close();
}

/*!
  Generate the tag file section with the given \a writer for the \a node
  specified, returning true if an element was written; otherwise returns
  false.
 */
void Tree::generateTagFileCompounds(QXmlStreamWriter &writer,
                                    const InnerNode *inner) const
{
    foreach (const Node *node, inner->childNodes()) {

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

        QString kind;
        switch (node->type()) {
            case Node::Namespace:
                kind = "namespace";
                break;
            case Node::Class:
                kind = "class";
                break;
            case Node::Enum:
            case Node::Typedef:
            case Node::Property:
            case Node::Function:
            case Node::Variable:
            case Node::Target:
            default:
                continue;
        }

        QString access;
        switch (node->access()) {
            case Node::Public:
                access = "public";
                break;
            case Node::Protected:
                access = "protected";
                break;
            case Node::Private:
            default:
                continue;
        }

        QString objName = node->name();

        // Special case: only the root node should have an empty name.
        if (objName.isEmpty() && node != root())
            continue;

        // *** Write the starting tag for the element here. ***
        writer.writeStartElement("compound");
        writer.writeAttribute("kind", kind);

        if (node->type() == Node::Class) {
            writer.writeTextElement("name", fullDocumentName(node));
            writer.writeTextElement("filename", HtmlGenerator::fullDocumentLocation(node));

            // Classes contain information about their base classes.
            const ClassNode *classNode = static_cast<const ClassNode*>(node);
            QList<RelatedClass> bases = classNode->baseClasses();
            foreach (const RelatedClass &related, bases) {
                ClassNode *baseClassNode = related.node;
                writer.writeTextElement("base", baseClassNode->name());
            }

            // Recurse to write all members.
            generateTagFileMembers(writer, static_cast<const InnerNode *>(node));
            writer.writeEndElement();

            // Recurse to write all compounds.
            generateTagFileCompounds(writer, static_cast<const InnerNode *>(node));
        } else {
            writer.writeTextElement("name", fullDocumentName(node));
            writer.writeTextElement("filename", HtmlGenerator::fullDocumentLocation(node));

            // Recurse to write all members.
            generateTagFileMembers(writer, static_cast<const InnerNode *>(node));
            writer.writeEndElement();

            // Recurse to write all compounds.
            generateTagFileCompounds(writer, static_cast<const InnerNode *>(node));
        }
    }
}

/*!
 */
void Tree::generateTagFileMembers(QXmlStreamWriter &writer,
                                  const InnerNode *inner) const
{
    foreach (const Node *node, inner->childNodes()) {

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

        QString nodeName;
        QString kind;
        switch (node->type()) {
            case Node::Enum:
                nodeName = "member";
                kind = "enum";
                break;
            case Node::Typedef:
                nodeName = "member";
                kind = "typedef";
                break;
            case Node::Property:
                nodeName = "member";
                kind = "property";
                break;
            case Node::Function:
                nodeName = "member";
                kind = "function";
                break;
            case Node::Namespace:
                nodeName = "namespace";
                break;
            case Node::Class:
                nodeName = "class";
                break;
            case Node::Variable:
            case Node::Target:
            default:
                continue;
        }

        QString access;
        switch (node->access()) {
            case Node::Public:
                access = "public";
                break;
            case Node::Protected:
                access = "protected";
                break;
            case Node::Private:
            default:
                continue;
        }

        QString objName = node->name();

        // Special case: only the root node should have an empty name.
        if (objName.isEmpty() && node != root())
            continue;

        // *** Write the starting tag for the element here. ***
        writer.writeStartElement(nodeName);
        if (!kind.isEmpty())
            writer.writeAttribute("kind", kind);

        switch (node->type()) {

        case Node::Class:
            writer.writeCharacters(fullDocumentName(node));
            writer.writeEndElement();
            break;
        case Node::Namespace:
            writer.writeCharacters(fullDocumentName(node));
            writer.writeEndElement();
            break;
        case Node::Function:
            {
                /*
                  Function nodes contain information about
                  the type of function being described.
                */

                const FunctionNode *functionNode =
                    static_cast<const FunctionNode*>(node);
                writer.writeAttribute("protection", access);

                switch (functionNode->virtualness()) {
                    case FunctionNode::NonVirtual:
                        writer.writeAttribute("virtualness", "non");
                        break;
                    case FunctionNode::ImpureVirtual:
                        writer.writeAttribute("virtualness", "virtual");
                        break;
                    case FunctionNode::PureVirtual:
                        writer.writeAttribute("virtual", "pure");
                        break;
                    default:
                        break;
                }
                writer.writeAttribute("static",
                                      functionNode->isStatic() ? "yes" : "no");

                if (functionNode->virtualness() == FunctionNode::NonVirtual)
                    writer.writeTextElement("type", functionNode->returnType());
                else
                    writer.writeTextElement("type",
                                            "virtual " + functionNode->returnType());

                writer.writeTextElement("name", objName);
                QStringList pieces = HtmlGenerator::fullDocumentLocation(node).split("#");
                writer.writeTextElement("anchorfile", pieces[0]);
                writer.writeTextElement("anchor", pieces[1]);

                // Write a signature attribute for convenience.
                QStringList signatureList;

                foreach (const Parameter &parameter, functionNode->parameters()) {
                    QString leftType = parameter.leftType();
                    const Node *leftNode = const_cast<Tree *>(this)->findNode(parameter.leftType().split("::"),
                        Node::Typedef, 0, SearchBaseClasses|NonFunction);
                    if (!leftNode) {
                        leftNode = const_cast<Tree *>(this)->findNode(
                            parameter.leftType().split("::"), Node::Typedef,
                            node->parent(), SearchBaseClasses|NonFunction);
                    }
                    if (leftNode) {
                        const TypedefNode *typedefNode = static_cast<const TypedefNode *>(leftNode);
                        if (typedefNode->associatedEnum()) {
                            leftType = "QFlags<"+fullDocumentName(typedefNode->associatedEnum())+">";
                        }
                    }
                    signatureList.append(leftType + " " + parameter.name());
                }

                QString signature = "("+signatureList.join(", ")+")";
                if (functionNode->isConst())
                    signature += " const";
                if (functionNode->virtualness() == FunctionNode::PureVirtual)
                    signature += " = 0";
                writer.writeTextElement("arglist", signature);
            }
            writer.writeEndElement(); // member
            break;

        case Node::Property:
            {
                const PropertyNode *propertyNode = static_cast<const PropertyNode*>(node);
                writer.writeAttribute("type", propertyNode->dataType());
                writer.writeTextElement("name", objName);
                QStringList pieces = HtmlGenerator::fullDocumentLocation(node).split("#");
                writer.writeTextElement("anchorfile", pieces[0]);
                writer.writeTextElement("anchor", pieces[1]);
                writer.writeTextElement("arglist", "");
            }
            writer.writeEndElement(); // member
            break;

        case Node::Enum:
            {
                const EnumNode *enumNode = static_cast<const EnumNode*>(node);
                writer.writeTextElement("name", objName);
                QStringList pieces = HtmlGenerator::fullDocumentLocation(node).split("#");
                writer.writeTextElement("anchor", pieces[1]);
                writer.writeTextElement("arglist", "");
                writer.writeEndElement(); // member

                for (int i = 0; i < enumNode->items().size(); ++i) {
                    EnumItem item = enumNode->items().value(i);
                    writer.writeStartElement("member");
                    writer.writeAttribute("name", item.name());
                    writer.writeTextElement("anchor", pieces[1]);
                    writer.writeTextElement("arglist", "");
                    writer.writeEndElement(); // member
                }
            }
            break;

        case Node::Typedef:
            {
                const TypedefNode *typedefNode = static_cast<const TypedefNode*>(node);
                if (typedefNode->associatedEnum())
                    writer.writeAttribute("type", fullDocumentName(typedefNode->associatedEnum()));
                else
                    writer.writeAttribute("type", "");
                writer.writeTextElement("name", objName);
                QStringList pieces = HtmlGenerator::fullDocumentLocation(node).split("#");
                writer.writeTextElement("anchorfile", pieces[0]);
                writer.writeTextElement("anchor", pieces[1]);
                writer.writeTextElement("arglist", "");
            }
            writer.writeEndElement(); // member
            break;

        case Node::Variable:
        case Node::Target:
        default:
            break;
        }
    }
}

/*!
 */
void Tree::generateTagFile(const QString &fileName) const
{
    QFile file(fileName);
    if (!file.open(QFile::WriteOnly | QFile::Text))
        return ;

    QXmlStreamWriter writer(&file);
    writer.setAutoFormatting(true);
    writer.writeStartDocument();

    writer.writeStartElement("tagfile");

    generateTagFileCompounds(writer, root());

    writer.writeEndElement(); // tagfile
    writer.writeEndDocument();
    file.close();
}

/*!
 */
void Tree::addExternalLink(const QString &url, const Node *relative)
{
    FakeNode *fakeNode = new FakeNode(root(), url, Node::ExternalPage);
    fakeNode->setAccess(Node::Public);

    // Create some content for the node.
    QSet<QString> emptySet;
    Location location(relative->doc().location());
    Doc doc(location, location, " ", emptySet); // placeholder
    fakeNode->setDoc(doc);
}

/*!
  Construct the full document name for \a node and return the
  name.
 */
QString Tree::fullDocumentName(const Node *node) const
{
    if (!node)
        return "";

    QStringList pieces;
    const Node *n = node;

    do {
        if (!n->name().isEmpty() &&
            ((n->type() != Node::Fake) || (n->subType() != Node::QmlPropertyGroup)))
            pieces.insert(0, n->name());

        if ((n->type() == Node::Fake) && (n->subType() != Node::QmlPropertyGroup))
            break;

        // Examine the parent node if one exists.
        if (n->parent())
            n = n->parent();
        else
            break;
    } while (true);

    // Create a name based on the type of the ancestor node.
    if (n->type() == Node::Fake)
        return pieces.join("#");
    else
        return pieces.join("::");
}

QT_END_NAMESPACE