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

**

** 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 QtDBus 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.

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** $QT_END_LICENSE$

**

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

#include <QtCore/qmetaobject.h>

#include <QtCore/qstringlist.h>

#include "qdbusinterface_p.h"   // for ANNOTATION_NO_WAIT

#include "qdbusabstractadaptor_p.h" // for QCLASSINFO_DBUS_*

#include "qdbusconnection_p.h"  // for the flags

#include "qdbusmetatype_p.h"

#include "qdbusmetatype.h"

#include "qdbusutil_p.h"

QT_BEGIN_NAMESPACE

extern QDBUS_EXPORT QString qDBusGenerateMetaObjectXml(QString interface, const QMetaObject *mo,

                                                       const QMetaObject *base, int flags);

static inline QString typeNameToXml(const char *typeName)

{

    // ### copied from qtextdocument.cpp

    // ### move this into QtCore at some point

    QString plain = QLatin1String(typeName);

    QString rich;

    rich.reserve(int(plain.length() * 1.1));

    for (int i = 0; i < plain.length(); ++i) {

        if (plain.at(i) == QLatin1Char('<'))

            rich += QLatin1String("<");

        else if (plain.at(i) == QLatin1Char('>'))

            rich += QLatin1String(">");

        else if (plain.at(i) == QLatin1Char('&'))

            rich += QLatin1String("&");

        else

            rich += plain.at(i);

    }

    return rich;

}

// implement the D-Bus org.freedesktop.DBus.Introspectable interface

// we do that by analysing the metaObject of all the adaptor interfaces

static QString generateInterfaceXml(const QMetaObject *mo, int flags, int methodOffset, int propOffset)

{

    QString retval;

    // start with properties:

    if (flags & (QDBusConnection::ExportScriptableProperties |

                 QDBusConnection::ExportNonScriptableProperties)) {

        for (int i = propOffset; i < mo->propertyCount(); ++i) {

            static const char *accessvalues[] = {0, "read", "write", "readwrite"};

            QMetaProperty mp = mo->property(i);

            if (!((mp.isScriptable() && (flags & QDBusConnection::ExportScriptableProperties)) ||

                  (!mp.isScriptable() && (flags & QDBusConnection::ExportNonScriptableProperties))))

                continue;

            int access = 0;

            if (mp.isReadable())

                access |= 1;

            if (mp.isWritable())

                access |= 2;

            int typeId = qDBusNameToTypeId(mp.typeName());

            if (!typeId)

                continue;

            const char *signature = QDBusMetaType::typeToSignature(typeId);

            if (!signature)

                continue;

            retval += QString::fromLatin1("    <property name=\"%1\" type=\"%2\" access=\"%3\"")

                      .arg(QLatin1String(mp.name()))

                      .arg(QLatin1String(signature))

                      .arg(QLatin1String(accessvalues[access]));

            if (QDBusMetaType::signatureToType(signature) == QVariant::Invalid) {

                const char *typeName = QVariant::typeToName(QVariant::Type(typeId));

                retval += QString::fromLatin1(">\n      <annotation name=\"com.trolltech.QtDBus.QtTypeName\" value=\"%3\"/>\n    </property>\n")

                          .arg(typeNameToXml(typeName));

            } else {

                retval += QLatin1String("/>\n");

            }

        }

    }

    // now add methods:

    for (int i = methodOffset; i < mo->methodCount(); ++i) {

        QMetaMethod mm = mo->method(i);

        QByteArray signature = mm.signature();

        int paren = signature.indexOf('(');

        bool isSignal;

        if (mm.methodType() == QMetaMethod::Signal)

            // adding a signal

            isSignal = true;

        else if (mm.methodType() == QMetaMethod::Slot && mm.access() == QMetaMethod::Public)

            isSignal = false;

        else

            continue;           // neither signal nor public slot

        if (isSignal && !(flags & (QDBusConnection::ExportScriptableSignals |

                                   QDBusConnection::ExportNonScriptableSignals)))

            continue;           // we're not exporting any signals

        if (!isSignal && !(flags & (QDBusConnection::ExportScriptableSlots |

                                    QDBusConnection::ExportNonScriptableSlots)))

            continue;           // we're not exporting any slots

        QString xml = QString::fromLatin1("    <%1 name=\"%2\">\n")

                      .arg(isSignal ? QLatin1String("signal") : QLatin1String("method"))

                      .arg(QLatin1String(signature.left(paren)));

        // check the return type first

        int typeId = qDBusNameToTypeId(mm.typeName());

        if (typeId) {

            const char *typeName = QDBusMetaType::typeToSignature(typeId);

            if (typeName) {

                xml += QString::fromLatin1("      <arg type=\"%1\" direction=\"out\"/>\n")

                       .arg(typeNameToXml(typeName));

                // do we need to describe this argument?

                if (QDBusMetaType::signatureToType(typeName) == QVariant::Invalid)

                    xml += QString::fromLatin1("      <annotation name=\"com.trolltech.QtDBus.QtTypeName.Out0\" value=\"%1\"/>\n")

            } else

                continue;

        }

        else if (*mm.typeName())

            continue;           // wasn't a valid type

        QList<QByteArray> names = mm.parameterNames();

        QList<int> types;

        int inputCount = qDBusParametersForMethod(mm, types);

        if (inputCount == -1)

            continue;           // invalid form

        if (isSignal && inputCount + 1 != types.count())

            continue;           // signal with output arguments?

        if (isSignal && types.at(inputCount) == QDBusMetaTypeId::message)

            continue;           // signal with QDBusMessage argument?

        if (isSignal && mm.attributes() & QMetaMethod::Cloned)

            continue;           // cloned signal?

        int j;

        bool isScriptable = mm.attributes() & QMetaMethod::Scriptable;

        for (j = 1; j < types.count(); ++j) {

            // input parameter for a slot or output for a signal

            if (types.at(j) == QDBusMetaTypeId::message) {

                isScriptable = true;

                continue;

            }

            QString name;

            if (!names.at(j - 1).isEmpty())

                name = QString::fromLatin1("name=\"%1\" ").arg(QLatin1String(names.at(j - 1)));

            bool isOutput = isSignal || j > inputCount;

            const char *signature = QDBusMetaType::typeToSignature(types.at(j));

            xml += QString::fromLatin1("      <arg %1type=\"%2\" direction=\"%3\"/>\n")

                   .arg(name)

                   .arg(QLatin1String(signature))

                   .arg(isOutput ? QLatin1String("out") : QLatin1String("in"));

            // do we need to describe this argument?

            if (QDBusMetaType::signatureToType(signature) == QVariant::Invalid) {

                const char *typeName = QVariant::typeToName( QVariant::Type(types.at(j)) );

                xml += QString::fromLatin1("      <annotation name=\"com.trolltech.QtDBus.QtTypeName.%1%2\" value=\"%3\"/>\n")

                       .arg(isOutput ? QLatin1String("Out") : QLatin1String("In"))

                       .arg(isOutput && !isSignal ? j - inputCount : j - 1)

                       .arg(typeNameToXml(typeName));

            }

        }

        int wantedMask;

        if (isScriptable)

            wantedMask = isSignal ? QDBusConnection::ExportScriptableSignals

                                  : QDBusConnection::ExportScriptableSlots;

        else

            wantedMask = isSignal ? QDBusConnection::ExportNonScriptableSignals

                                  : QDBusConnection::ExportNonScriptableSlots;

        if ((flags & wantedMask) != wantedMask)

            continue;

        if (qDBusCheckAsyncTag(mm.tag()))

            // add the no-reply annotation

            xml += QLatin1String("      <annotation name=\"" ANNOTATION_NO_WAIT "\""

                                 " value=\"true\"/>\n");

        retval += xml;

        retval += QString::fromLatin1("    </%1>\n")

                  .arg(isSignal ? QLatin1String("signal") : QLatin1String("method"));

    }

    return retval;

}

QString qDBusGenerateMetaObjectXml(QString interface, const QMetaObject *mo,

                                   const QMetaObject *base, int flags)

{

    if (interface.isEmpty())

        // generate the interface name from the meta object

        interface = qDBusInterfaceFromMetaObject(mo);

    QString xml;

    int idx = mo->indexOfClassInfo(QCLASSINFO_DBUS_INTROSPECTION);

    if (idx >= mo->classInfoOffset())

        return QString::fromUtf8(mo->classInfo(idx).value());

    else

        xml = generateInterfaceXml(mo, flags, base->methodCount(), base->propertyCount());

    if (xml.isEmpty())

        return QString();       // don't add an empty interface

    return QString::fromLatin1("  <interface name=\"%1\">\n%2  </interface>\n")

        .arg(interface, xml);

}

#if 0

QString qDBusGenerateMetaObjectXml(QString interface, const QMetaObject *mo, const QMetaObject *base,

                                   int flags)

{

    if (interface.isEmpty()) {

        // generate the interface name from the meta object

        int idx = mo->indexOfClassInfo(QCLASSINFO_DBUS_INTERFACE);

        if (idx >= mo->classInfoOffset()) {

            interface = QLatin1String(mo->classInfo(idx).value());

        } else {

            interface = QLatin1String(mo->className());

            interface.replace(QLatin1String("::"), QLatin1String("."));

            if (interface.startsWith(QLatin1String("QDBus"))) {

                interface.prepend(QLatin1String("com.trolltech.QtDBus."));

            } else if (interface.startsWith(QLatin1Char('Q')) &&

                       interface.length() >= 2 && interface.at(1).isUpper()) {

                // assume it's Qt

                interface.prepend(QLatin1String("com.trolltech.Qt."));

            } else if (!QCoreApplication::instance()||

                       QCoreApplication::instance()->applicationName().isEmpty()) {

                interface.prepend(QLatin1String("local."));

            } else {

                interface.prepend(QLatin1Char('.')).prepend(QCoreApplication::instance()->applicationName());

                QStringList domainName =

                    QCoreApplication::instance()->organizationDomain().split(QLatin1Char('.'),

                                                                             QString::SkipEmptyParts);

                if (domainName.isEmpty())

                    interface.prepend(QLatin1String("local."));

                else

                    for (int i = 0; i < domainName.count(); ++i)

                        interface.prepend(QLatin1Char('.')).prepend(domainName.at(i));

            }

        }

    }

    QString xml;

    int idx = mo->indexOfClassInfo(QCLASSINFO_DBUS_INTROSPECTION);

    if (idx >= mo->classInfoOffset())

        return QString::fromUtf8(mo->classInfo(idx).value());

    else

        xml = generateInterfaceXml(mo, flags, base->methodCount(), base->propertyCount());

    if (xml.isEmpty())

        return QString();       // don't add an empty interface

    return QString::fromLatin1("  <interface name=\"%1\">\n%2  </interface>\n")

        .arg(interface, xml);

}

#endif

QT_END_NAMESPACE