Add --view command line option to allow viewing msg files. If someone knows a better solution for the 'prevent invisible KMail from running if viewing message fails' problem then let me know. Hint: Now someone needs to write a desktop file which associates message/rfc822 files with 'kmail --view %u'.

svn path=/trunk/kdepim/; revision=308138

kmail_options.h

@@ -20,6 +20,7 @@ KCmdLineOptions kmail_options[] =
   { "attach <url>",             I18N_NOOP("Add an attachment to the mail. This can be repeated."), 0 },
   { "check",			I18N_NOOP("Only check for new mail."), 0 },
   { "composer",			I18N_NOOP("Only open composer window."), 0 },
+  { "view <url>",               I18N_NOOP("View the given message file." ), 0 },
   { "+[address|URL]",		I18N_NOOP("Send message to 'address' resp. "
                                           "attach the file the 'URL' points "
                                           "to."), 0 },

kmcommands.cpp

@@ -72,6 +72,8 @@ using KMail::FolderJob;
 #include "mailsourceviewer.h"
 using KMail::MailSourceViewer;
 #include "kmreadermainwin.h"
+#include "secondarywindow.h"
+using KMail::SecondaryWindow;
 
 #include "kmcommands.moc"
 
@@ -808,6 +810,12 @@ void KMOpenMsgCommand::slotResult( KIO::Job *job )
       if ( startOfMessage == -1 ) {
         KMessageBox::sorry( parentWidget(),
                             i18n( "The file doesn't contain a message." ) );
+        // Emulate closing of a secondary window so that KMail exits in case it
+        // was started with the --view command line option. Otherwise an
+        // invisible KMail would keep running.
+        SecondaryWindow *win = new SecondaryWindow();
+        win->close();
+        win->deleteLater();
         deleteLater();
         return;
       }
@@ -829,6 +837,10 @@ void KMOpenMsgCommand::slotResult( KIO::Job *job )
       KMessageBox::sorry( parentWidget(),
                           i18n( "The file doesn't contain a message." ) );
       delete dwMsg; dwMsg = 0;
+      // Emulate closing of a secondary window (see above).
+      SecondaryWindow *win = new SecondaryWindow();
+      win->close();
+      win->deleteLater();
       deleteLater();
       return;
     }

kmkernel.cpp

@@ -33,6 +33,7 @@ using KRecentAddress::RecentAddresses;
 #include "kmidentity.h"
 #include "identitymanager.h"
 #include "configuredialog.h"
+#include "kmcommands.h"
 // #### disabled for now #include "startupwizard.h"
 
 
@@ -87,7 +88,7 @@ KMKernel::KMKernel (QObject *parent, const char *name) :
   mIdentityManager(0), mProgress(0), mConfigureDialog(0),
   mContextMenuShown( false )
 {
-  //kdDebug(5006) << "KMKernel::KMKernel" << endl;
+  kdDebug(5006) << "KMKernel::KMKernel" << endl;
   mySelf = this;
   the_startingUp = true;
   closed_by_user = true;
@@ -178,7 +179,7 @@ bool KMKernel::handleCommandLine( bool noArgsOpensReader )
   KURL::List attachURLs;
   bool mailto = false;
   bool checkMail = false;
-  //bool viewOnly = false;
+  bool viewOnly = false;
 
   // process args:
   KCmdLineArgs *args = KCmdLineArgs::parsedArgs();
@@ -227,6 +228,17 @@ bool KMKernel::handleCommandLine( bool noArgsOpensReader )
   if (args->isSet("check"))
     checkMail = true;
 
+  if ( args->getOption( "view" ) ) {
+    viewOnly = true;
+    const QString filename =
+      QString::fromLocal8Bit( args->getOption( "view" ) );
+    messageFile = KURL( filename );
+    if ( !messageFile.isValid() ) {
+      messageFile = KURL();
+      messageFile.setPath( filename );
+    }
+  }
+
   for(int i= 0; i < args->count(); i++)
   {
     if (strncasecmp(args->arg(i),"mailto:",7)==0)
@@ -248,10 +260,14 @@ bool KMKernel::handleCommandLine( bool noArgsOpensReader )
 
   args->clear();
 
-  if (!noArgsOpensReader && !mailto && !checkMail)
+  if ( !noArgsOpensReader && !mailto && !checkMail && !viewOnly )
     return false;
 
-  action (mailto, checkMail, to, cc, bcc, subj, body, messageFile, attachURLs);
+  if ( viewOnly )
+    viewMessage( messageFile );
+  else
+    action( mailto, checkMail, to, cc, bcc, subj, body, messageFile,
+            attachURLs );
   return true;
 }
 
@@ -424,6 +440,15 @@ DCOPRef KMKernel::openComposer(const QString &to, const QString &cc,
   return DCOPRef(cWin);
 }
 
+int KMKernel::viewMessage( const KURL & messageFile )
+{
+  KMOpenMsgCommand *openCommand = new KMOpenMsgCommand( 0, messageFile );
+
+  openCommand->start();
+
+  return 1;
+}
+
 int KMKernel::sendCertificate( const QString& to, const QByteArray& certData )
 {
   KMMessage *msg = new KMMessage;

kmkernel.h

@@ -112,6 +112,7 @@ public:
   DCOPRef getFolder( const QString& vpath );
   void selectFolder( QString folder );
   virtual bool showMail( Q_UINT32 serialNumber, QString messageId );
+  int viewMessage( const KURL & messageFile );
   /** normal control stuff */
 
   static KMKernel *self() { return mySelf; }