kio Library: kdcopservicestarter.cpp Source File (kio Library)

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# kdcopservicestarter.cpp

    00001 /* This file is part of the KDE libraries
    00002    Copyright (C) 2003 David Faure <faure@kde.org>
    00003
    00004    This library is free software; you can redistribute it and/or
    00005    modify it under the terms of the GNU Library General Public
    00006    License version 2 as published by the Free Software Foundation.
    00007
    00008    This library is distributed in the hope that it will be useful,
    00009    but WITHOUT ANY WARRANTY; without even the implied warranty of
    00010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00011    Library General Public License for more details.
    00012
    00013    You should have received a copy of the GNU Library General Public License
    00014    along with this library; see the file COPYING.LIB.  If not, write to
    00015    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00016    Boston, MA 02111-1307, USA.
    00017 */
    00018
    00019 #include "kdcopservicestarter.h"
    00020 #include "ktrader.h"
    00021 #include <kapplication.h>
    00022 #include "kservice.h"
    00023 #include <kstaticdeleter.h>
    00024 #include <kdebug.h>
    00025 #include <klocale.h>
    00026 #include <dcopclient.h>
    00027
    00028 static KStaticDeleter<KDCOPServiceStarter> dss_sd;
    00029 KDCOPServiceStarter* KDCOPServiceStarter::s_self;
    00030
    00031 KDCOPServiceStarter* KDCOPServiceStarter::self()
    00032 {
    00033     if ( !s_self )
    00034         dss_sd.setObject( s_self, new KDCOPServiceStarter );
    00035     return s_self;
    00036 }
    00037
    00038 KDCOPServiceStarter::KDCOPServiceStarter()
    00039 {
    00040     // Set the singleton instance - useful when a derived KDCOPServiceStarter
    00041     // was created (before self() was called)
    00042     s_self = this;
    00043 }
    00044
    00045 KDCOPServiceStarter::~KDCOPServiceStarter()
    00046 {
    00047 }
    00048
    00049 int KDCOPServiceStarter::findServiceFor( const QString& serviceType,
    00050                                          const QString& _constraint,
    00051                                          const QString& preferences,
    00052                                          QString *error, QCString* pDcopService,
    00053                                          int flags )
    00054 {
    00055     // Ask the trader which service is preferred for this servicetype
    00056     // We want one that provides a DCOP interface
    00057     QString constraint = _constraint;
    00058     if ( !constraint.isEmpty() )
    00059         constraint += " and ";
    00060     constraint += "exist [X-DCOP-ServiceName]";
    00061     KTrader::OfferList offers = KTrader::self()->query(serviceType, "Application", constraint, preferences);
    00062     if ( offers.isEmpty() ) {
    00063         if ( error )
    00064             *error = i18n("No service implementing %1").arg( serviceType );
    00065         kdWarning() << "KDCOPServiceStarter: No service implementing " << serviceType << endl;
    00066         return -1;
    00067     }
    00068     KService::Ptr ptr = offers.first();
    00069     QCString dcopService = ptr->property("X-DCOP-ServiceName").toString().latin1();
    00070
    00071     if ( !kapp->dcopClient()->isApplicationRegistered( dcopService ) )
    00072     {
    00073         QString error;
    00074         if ( startServiceFor( serviceType, constraint, preferences, &error, &dcopService, flags ) != 0 )
    00075         {
    00076             kdDebug() << "KDCOPServiceStarter: Couldn't start service: " << error << endl;
    00077             return -2;
    00078         }
    00079     }
    00080     kdDebug() << "KDCOPServiceStarter: DCOP service is available now, as " << dcopService << endl;
    00081     if ( pDcopService )
    00082         *pDcopService = dcopService;
    00083     return 0;
    00084 }
    00085
    00086 int KDCOPServiceStarter::startServiceFor( const QString& serviceType,
    00087                                           const QString& constraint,
    00088                                           const QString& preferences,
    00089                                           QString *error, QCString* dcopService, int /*flags*/ )
    00090 {
    00091     KTrader::OfferList offers = KTrader::self()->query(serviceType, "Application", constraint, preferences);
    00092     if ( offers.isEmpty() )
    00093         return -1;
    00094     KService::Ptr ptr = offers.first();
    00095     kdDebug() << "KDCOPServiceStarter: starting " << ptr->desktopEntryPath() << endl;
    00096     return kapp->startServiceByDesktopPath( ptr->desktopEntryPath(), QStringList(), error, dcopService );
    00097 }

This file is part of the documentation for kio Library Version 3.4.1.
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