kmail/main.cpp

   1 /* -*- mode: C++; c-file-style: "gnu" -*-
   2  * kmail: KDE mail client
   3  * Copyright (c) 1996-1998 Stefan Taferner <taferner@kde.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  *
  19  */
  20
  21 #include <libkdepim/pimapplication.h>
  22 #include <kglobal.h>
  23 #include "kmkernel.h" //control center
  24 #include "kmail_options.h"
  25
  26 #include <kdebug.h>
  27
  28 #undef Status // stupid X headers
  29
  30 #include "aboutdata.h"
  31
  32 #include "kmstartup.h"
  33
  34 #ifdef Q_WS_WIN
  35 #include <unistd.h>
  36 #include <windows.h>
  37 #endif
  38
  39 //-----------------------------------------------------------------------------
  40
  41 class KMailApplication : public KPIM::PimApplication
  42 {
  43 public:
  44   KMailApplication() : KPIM::PimApplication(),
  45                        mDelayedInstanceCreation( false ),
  46                        mEventLoopReached( false ) { }
  47   virtual int newInstance();
  48   void commitData(QSessionManager& sm);
  49   void setEventLoopReached();
  50   void delayedInstanceCreation();
  51 protected:
  52   bool mDelayedInstanceCreation;
  53   bool mEventLoopReached;
  54
  55 };
  56
  57 void KMailApplication::commitData(QSessionManager& sm) {
  58   kmkernel->dumpDeadLetters();
  59   kmkernel->setShuttingDown( true ); // Prevent further dumpDeadLetters calls
  60   KApplication::commitData( sm );
  61 }
  62
  63 void KMailApplication::setEventLoopReached() {
  64   mEventLoopReached = true;
  65 }
  66
  67 int KMailApplication::newInstance()
  68 {
  69   kDebug();
  70
  71   // If the event loop hasn't been reached yet, the kernel is probably not
  72   // fully initialized. Creating an instance would therefore fail, this is why
  73   // that is delayed until delayedInstanceCreation() is called.
  74   if ( !mEventLoopReached ) {
  75     kDebug() << "Delaying instance creation.";
  76     mDelayedInstanceCreation = true;
  77     return 0;
  78   }
  79
  80   if (!kmkernel)
  81      return 0;
  82
  83   if (!kmkernel->firstInstance() || !kapp->isSessionRestored())
  84     kmkernel->handleCommandLine( true );
  85   kmkernel->setFirstInstance(false);
  86   return 0;
  87 }
  88
  89 void KMailApplication::delayedInstanceCreation() {
  90   if ( mDelayedInstanceCreation )
  91     newInstance();
  92 }
  93
  94 int main(int argc, char *argv[])
  95 {
  96   // WABA: KMail is a KUniqueApplication. Unfortunately this makes debugging
  97   // a bit harder: You should pass --nofork as commandline argument when using
  98   // a debugger. In gdb you can do this by typing "set args --nofork" before
  99   // typing "run".
 100 #if 0 // for testing KUniqueAppliaction on Windows
 101   MessageBoxA(NULL,
 102              QString("main() %1 pid=%2").arg(argv[0]).arg(getpid()).toLatin1(),
 103              QString("main() \"%1\"").arg(argv[0]).toLatin1(), MB_OK|MB_ICONINFORMATION|MB_TASKMODAL);
 104 #endif
 105   KMail::AboutData about;
 106
 107   KCmdLineArgs::init(argc, argv, &about);
 108   KCmdLineArgs::addCmdLineOptions( kmail_options() ); // Add kmail options
 109   if (!KMailApplication::start())
 110      return 0;
 111
 112   KMailApplication app;
 113
 114   // Qt doesn't treat the system tray as a window, and therefore Qt would quit
 115   // the event loop when an error message is clicked away while KMail is in the
 116   // tray.
 117   // Rely on KGlobal::ref() and KGlobal::deref() instead, like we did in KDE3.
 118   // See http://bugs.kde.org/show_bug.cgi?id=163479
 119   QApplication::setQuitOnLastWindowClosed( false );
 120
 121   // import i18n data and icons from libraries:
 122   KMail::insertLibraryCataloguesAndIcons();
 123
 124   KMail::lockOrDie();
 125
 126   //local, do the init
 127   KMKernel kmailKernel;
 128   kmailKernel.init();
 129
 130   // and session management
 131   kmailKernel.doSessionManagement();
 132
 133   // any dead letters?
 134   kmailKernel.recoverDeadLetters();
 135
 136   kmsetSignalHandler(kmsignalHandler);
 137
 138   kmkernel->setupDBus(); // Ok. We are ready for D-Bus requests.
 139   kmkernel->setStartingUp( false ); // Starting up is finished
 140
 141   //If the instance hasn't been created yet, do that now
 142   app.setEventLoopReached();
 143   app.delayedInstanceCreation();
 144
 145   // Go!
 146   int ret = qApp->exec();
 147   // clean up
 148   kmailKernel.cleanup();
 149
 150   KMail::cleanup(); // pid file (see kmstartup.cpp)
 151   return ret;
 152 }