/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtSCriptTools module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "qscriptxmlparser_p.h"+
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+
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#include <QtCore/qstringlist.h>+
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#include <QtCore/qxmlstream.h>+
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#include <QtCore/qdebug.h>+
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+
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QT_BEGIN_NAMESPACE+
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+
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static void tokenUntil(QXmlStreamReader &reader, QXmlStreamReader::TokenType target,+
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                       QList<int> &lineNumbers)+
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{+
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    int level = 0;+
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    while (!reader.atEnd()) {+
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        QXmlStreamReader::TokenType t = reader.readNext();+
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        if ((t == target) && (level == 0))+
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            return;+
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        if (t == QXmlStreamReader::StartElement) {+
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            ++level;+
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            QString line = reader.attributes().value(QLatin1String("line")).toString();+
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            if (!line.isEmpty())+
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                lineNumbers.append(line.toInt());+
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        } else if (t == QXmlStreamReader::EndElement) {+
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            --level;+
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        }+
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    }+
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//    Q_ASSERT_X(false, "QScriptXmlParser", "premature end of file");+
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}+
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+
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QScriptXmlParser::Result QScriptXmlParser::parse(const QString &xml)+
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{+
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    QMap<QString, int> functionsInfo;+
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    QList<int> lineNumbers;+
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    QXmlStreamReader reader(xml);+
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    reader.readNext(); // StartDocument+
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    reader.readNext(); // <program>+
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    reader.readNext(); // <source-elements>+
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    while (reader.readNext() == QXmlStreamReader::StartElement) {+
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//        qDebug() << reader.name().toString();+
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        int line = reader.attributes().value(QLatin1String("line")).toString().toInt();+
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        lineNumbers.append(line);+
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        if (reader.name() == QLatin1String("function-declaration")) {+
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            // extract the line number, name and formal parameters+
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            reader.readNext(); // <name>+
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            reader.readNext(); // Characters+
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            QString name = reader.text().toString();+
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            reader.readNext(); // </name>+
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            reader.readNext(); // <formal-parameter-list>+
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            QStringList formalParameters;+
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            while (reader.readNext() == QXmlStreamReader::StartElement) {+
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                reader.readNext(); // Characters+
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                formalParameters.append(reader.text().toString());+
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                reader.readNext(); // </identifier>+
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            }+
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            reader.readNext(); // <function-body>+
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            tokenUntil(reader, QXmlStreamReader::EndElement, lineNumbers);+
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+
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            QString signature;+
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            signature.append(name);+
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            signature.append(QLatin1Char('('));+
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            for (int i = 0; i < formalParameters.size(); ++i) {+
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                if (i > 0)+
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                    signature.append(QLatin1String(", "));+
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                signature.append(formalParameters.at(i));+
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            }+
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            signature.append(QLatin1Char(')'));+
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            functionsInfo.insert(signature, line);+
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        } else if (reader.name() == QLatin1String("expression-statement")) {+
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            reader.readNext();+
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            if ((reader.name() == QLatin1String("binary-expression"))+
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                && reader.attributes().value(QLatin1String("op")) == QLatin1String("=")) {+
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                // try to match a statement of the form Foo.prototype.bar = function() { ... }+
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                // this can be generalized...+
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                QString first, second, third;+
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                reader.readNext(); // LHS+
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                if (reader.name() == QLatin1String("field-member-expression")) {+
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                    reader.readNext();+
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                    if (reader.name() == QLatin1String("field-member-expression")) {+
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                        reader.readNext();+
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                        if (reader.name() == QLatin1String("identifier")) {+
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                            reader.readNext();+
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                            first = reader.text().toString();+
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                        }+
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                        tokenUntil(reader, QXmlStreamReader::EndElement, lineNumbers);+
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                        reader.readNext();+
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                        if (reader.name() == QLatin1String("identifier")) {+
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                            reader.readNext();+
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                            second = reader.text().toString();+
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                        }+
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                        tokenUntil(reader, QXmlStreamReader::EndElement, lineNumbers);+
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                    } else if (reader.name() == QLatin1String("identifier")) {+
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                        reader.readNext();+
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                        first = reader.text().toString();+
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                    }+
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                    tokenUntil(reader, QXmlStreamReader::EndElement, lineNumbers);+
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                    reader.readNext();+
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                    if (reader.name() == QLatin1String("identifier")) {+
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                        reader.readNext();+
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                        if (second.isEmpty())+
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                            second = reader.text().toString();+
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                        else+
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                            third = reader.text().toString();+
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                    }+
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                    tokenUntil(reader, QXmlStreamReader::EndElement, lineNumbers);+
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                }+
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                tokenUntil(reader, QXmlStreamReader::EndElement, lineNumbers);+
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                reader.readNext(); // RHS+
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                if (reader.name() == QLatin1String("function-expression")) {+
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                    if (!first.isEmpty()) {+
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                        QString signature = first;+
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                        if (!second.isEmpty()) {+
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                            signature.append(QLatin1Char('.'));+
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                            signature.append(second);+
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                            if (!third.isEmpty()) {+
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                                signature.append(QLatin1Char('.'));+
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                                signature.append(third);+
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                            }+
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                        }+
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                        signature.append(QLatin1String("()"));+
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                        functionsInfo.insert(signature, line);+
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                    }+
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                }+
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                tokenUntil(reader, QXmlStreamReader::EndElement, lineNumbers);+
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            }+
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            tokenUntil(reader, QXmlStreamReader::EndElement, lineNumbers);+
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        }+
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        tokenUntil(reader, QXmlStreamReader::EndElement, lineNumbers);+
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    }+
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    reader.readNext(); // </source-elements>+
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    reader.readNext(); // </program>+
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    reader.readNext(); // EndDocument+
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    Q_ASSERT(reader.atEnd());+
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    return Result(functionsInfo, lineNumbers.toSet());+
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}+
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+
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QT_END_NAMESPACE+
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