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

**

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

** All rights reserved.

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

**

** This file is part of the QtDeclarative module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

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

#include "private/qdeclarativedirparser_p.h"

#include "qdeclarativeerror.h"

#include <QtCore/QTextStream>

#include <QtCore/QtDebug>

QT_BEGIN_NAMESPACE

QDeclarativeDirParser::QDeclarativeDirParser()

    : _isParsed(false)

{

}

QDeclarativeDirParser::~QDeclarativeDirParser()

{

}

QUrl QDeclarativeDirParser::url() const

{

    return _url;

}

void QDeclarativeDirParser::setUrl(const QUrl &url)

{

    _url = url;

}

QString QDeclarativeDirParser::source() const

{

    return _source;

}

void QDeclarativeDirParser::setSource(const QString &source)

{

    _isParsed = false;

    _source = source;

}

bool QDeclarativeDirParser::isParsed() const

{

    return _isParsed;

}

bool QDeclarativeDirParser::parse()

{

    if (_isParsed)

        return true;

    _isParsed = true;

    _errors.clear();

    _plugins.clear();

    _components.clear();

    QTextStream stream(&_source);

    int lineNumber = 0;

    forever {

        ++lineNumber;

        const QString line = stream.readLine();

        if (line.isNull())

            break;

        QString sections[3];

        int sectionCount = 0;

        int index = 0;

        const int length = line.length();

        while (index != length) {

            const QChar ch = line.at(index);

            if (ch.isSpace()) {

                do { ++index; }

                while (index != length && line.at(index).isSpace());

            } else if (ch == QLatin1Char('#')) {

                // recognized a comment

                break;

            } else {

                const int start = index;

                do { ++index; }

                while (index != length && !line.at(index).isSpace());

                const QString lexeme = line.mid(start, index - start);

                if (sectionCount >= 3) {

                    reportError(lineNumber, start, QLatin1String("unexpected token"));

                } else {

                    sections[sectionCount++] = lexeme;

                }

            }

        }

        if (sectionCount == 0) {

            continue; // no sections, no party.

        } else if (sections[0] == QLatin1String("plugin")) {

            if (sectionCount < 2) {

                reportError(lineNumber, -1,

                            QString::fromUtf8("plugin directive requires 2 arguments, but %1 were provided").arg(sectionCount + 1));

                continue;

            }

            const Plugin entry(sections[1], sections[2]);

            _plugins.append(entry);

        } else if (sections[0] == QLatin1String("internal")) {

            if (sectionCount != 3) {

                reportError(lineNumber, -1,

                            QString::fromUtf8("internal types require 2 arguments, but %1 were provided").arg(sectionCount + 1));

                continue;

            }

            Component entry(sections[1], sections[2], -1, -1);

            entry.internal = true;

            _components.append(entry);

        } else if (sectionCount == 2) {

            // No version specified (should only be used for relative qmldir files)

            const Component entry(sections[0], sections[1], -1, -1);

            _components.append(entry);

        } else if (sectionCount == 3) {

            const QString &version = sections[1];

            const int dotIndex = version.indexOf(QLatin1Char('.'));

            if (dotIndex == -1) {

                reportError(lineNumber, -1, QLatin1String("expected '.'"));

            } else if (version.indexOf(QLatin1Char('.'), dotIndex + 1) != -1) {

                reportError(lineNumber, -1, QLatin1String("unexpected '.'"));

            } else {

                bool validVersionNumber = false;

                const int majorVersion = version.left(dotIndex).toInt(&validVersionNumber);

                if (validVersionNumber) {

                    const int minorVersion = version.mid(dotIndex + 1).toInt(&validVersionNumber);

                    if (validVersionNumber) {

                        const Component entry(sections[0], sections[2], majorVersion, minorVersion);

                        _components.append(entry);

                    }

                }

            }

        } else {

            reportError(lineNumber, -1, 

                        QString::fromUtf8("a component declaration requires 3 arguments, but %1 were provided").arg(sectionCount + 1));

        }

    }

    return hasError();

}

void QDeclarativeDirParser::reportError(int line, int column, const QString &description)

{

    QDeclarativeError error;

    error.setUrl(_url);

    error.setLine(line);

    error.setColumn(column);

    error.setDescription(description);

    _errors.append(error);

}

bool QDeclarativeDirParser::hasError() const

{

    if (! _errors.isEmpty())

        return true;

    return false;

}

QList<QDeclarativeError> QDeclarativeDirParser::errors() const

{

    return _errors;

}

QList<QDeclarativeDirParser::Plugin> QDeclarativeDirParser::plugins() const

{

    return _plugins;

}

QList<QDeclarativeDirParser::Component> QDeclarativeDirParser::components() const

{

    return _components;

}

QT_END_NAMESPACE