Detect if kmail is online or offline and automatically switch modes
This relates to Bug 1525 and Bug 1105

diff --git a/kmail/kmkernel.cpp b/kmail/kmkernel.cpp
index df0ab2d..162e179 100644
--- a/kmail/kmkernel.cpp
+++ b/kmail/kmkernel.cpp
@@ -169,6 +169,18 @@
 
   connectDCOPSignal( 0, 0, "kmailSelectFolder(TQString)",
                      "selectFolder(TQString)", false );
+
+  mNetworkManager = TDEGlobal::networkManager();
+  if (mNetworkManager) {
+    connect( mNetworkManager, TQT_SIGNAL( networkDeviceStateChanged( TDENetworkConnectionStatus::TDENetworkConnectionStatus, TDENetworkConnectionStatus::TDENetworkConnectionStatus, TQString ) ),
+        this, TQT_SLOT( slotNetworkStateChanged( TDENetworkConnectionStatus::TDENetworkConnectionStatus newState, TDENetworkConnectionStatus::TDENetworkConnectionStatus previousState, TQString hwAddress ) ) );
+    if (networkStateConnected()) {
+      resumeNetworkJobs();
+    }
+    else {
+      stopNetworkJobs();
+    }
+  }
 }
 
 KMKernel::~KMKernel ()
@@ -2456,6 +2468,38 @@
   return mTimeOfLastMessageCountChange;
 }
 
+bool KMKernel::networkStateConnected()
+{
+  if (mNetworkManager) {
+    TDENetworkGlobalManagerFlags::TDENetworkGlobalManagerFlags networkStatus = mNetworkManager->backendStatus();
+    if ((networkStatus & TDENetworkGlobalManagerFlags::Connected)
+        || (networkStatus & TDENetworkGlobalManagerFlags::BackendUnavailable)
+        || (networkStatus == TDENetworkGlobalManagerFlags::Unknown)
+        ){
+      // Connected or no backend available
+      return true;
+    }
+    else {
+      // Not connected
+      return false;
+    }
+  }
+  else {
+    // Assume connected
+    return true;
+  }
+}
+
+void KMKernel::slotNetworkStateChanged(TDENetworkConnectionStatus::TDENetworkConnectionStatus, TDENetworkConnectionStatus::TDENetworkConnectionStatus, TQString)
+{
+  if (networkStateConnected()) {
+    resumeNetworkJobs();
+  }
+  else {
+    stopNetworkJobs();
+  }
+}
+
 Wallet *KMKernel::wallet() {
   static bool walletOpenFailed = false;
   if ( mWallet && mWallet->isOpen() )
diff --git a/kmail/kmkernel.h b/kmail/kmkernel.h
index 993c8a0..0dc4644 100644
--- a/kmail/kmkernel.h
+++ b/kmail/kmkernel.h
@@ -14,6 +14,8 @@
 #include <tdeimproxy.h>
 #include <tdepimmacros.h>
 
+#include <tdenetworkconnections.h>
+
 #include "kmailIface.h"
 #include "kmmsgbase.h"
 #include "globalsettings.h"
@@ -434,6 +436,7 @@
 protected slots:
   void slotDataReq(TDEIO::Job*,TQByteArray&);
   void slotResult(TDEIO::Job*);
+  void slotNetworkStateChanged(TDENetworkConnectionStatus::TDENetworkConnectionStatus, TDENetworkConnectionStatus::TDENetworkConnectionStatus, TQString);
 
 signals:
   void configChanged();
@@ -443,6 +446,7 @@
 private:
   void openReader( bool onlyCheck );
   KMMsgStatus strToStatus(const TQString &flags);
+  bool networkStateConnected();
   KMFolder *currentFolder();
 
   KMFolder *the_inboxFolder;
@@ -522,6 +526,8 @@
   TQStringList mAddMessageMsgIds;
   TQString     mAddMessageLastFolder;
   KMFolder    *mAddMsgCurrentFolder;
+
+  TDEGlobalNetworkManager *mNetworkManager;
 };
 
 #endif