Fixed moving channels between number groups in SVDRP's MOVC command and the Channels menu, in case a channel is moved to a higher number and into a numbered group

CONTRIBUTORS

@@ -2918,6 +2918,7 @@ Manuel Reimer <Manuel.Reimer@gmx.de>
  order to avoid discontinuities
  for setting the environment variables HOME, USER, LOGNAME and SHELL accordingly
  when switching to a less privileged user id
+ for reporting a bug in moving channels between number groups in SVDRP's MOVC command
 
 Rene van den Braken <rene@vandenbraken.name>
  for reporting a bug in writing the PCR pid into the PMT in

HISTORY

@@ -9419,3 +9419,9 @@ Video Disk Recorder Revision History
   the call is now automatically forwarded to QueueMessage().
 - Fixed handling the S2SatelliteDeliverySystemDescriptor for transponders broadcasting
   in "backwards compatibility mode" according to ETSI EN 300 468 (thanks to Onur Sentürk).
+
+2020-04-11:
+
+- Fixed moving channels between number groups in SVDRP's MOVC command and the Channels
+  menu, in case a channel is moved to a higher number and into a numbered group
+  (reported by Manuel Reimer).

channels.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: channels.c 4.5 2017/06/10 15:08:56 kls Exp $
+ * $Id: channels.c 4.6 2020/04/11 09:22:05 kls Exp $
  */
 
 #include "channels.h"
@@ -946,6 +946,25 @@ void cChannels::ReNumber(void)
       }
 }
 
+bool cChannels::MoveNeedsDecrement(cChannel *From, cChannel *To)
+{
+  int Number = From->Number();
+  if (Number < To->Number()) {
+     for (cChannel *Channel = Next(From); Channel; Channel = Next(Channel)) {
+         if (Channel == To)
+            break;
+         if (Channel->GroupSep()) {
+            if (Channel->Number() > Number)
+               Number = Channel->Number();
+            }
+         else
+            Number++;
+         }
+     return Number == To->Number();
+     }
+  return false;
+}
+
 void cChannels::Del(cChannel *Channel)
 {
   UnhashChannel(Channel);

channels.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: channels.h 4.3 2017/06/10 15:06:40 kls Exp $
+ * $Id: channels.h 4.4 2020/04/11 09:22:05 kls Exp $
  */
 
 #ifndef __CHANNELS_H
@@ -230,6 +230,7 @@ public:
   int GetNextNormal(int Idx) const;  ///< Get next normal channel (not group)
   int GetPrevNormal(int Idx) const;  ///< Get previous normal channel (not group)
   void ReNumber(void);               ///< Recalculate 'number' based on channel type
+  bool MoveNeedsDecrement(cChannel *From, cChannel *To); // Detect special case when moving a channel (closely related to Renumber())
   void Del(cChannel *Channel);       ///< Delete the given Channel from the list
   const cChannel *GetByNumber(int Number, int SkipGap = 0) const;
   cChannel *GetByNumber(int Number, int SkipGap = 0) { return const_cast<cChannel *>(static_cast<const cChannels *>(this)->GetByNumber(Number, SkipGap)); }

menu.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: menu.c 4.80 2019/05/28 15:24:43 kls Exp $
+ * $Id: menu.c 4.81 2020/04/11 09:22:05 kls Exp $
  */
 
 #include "menu.h"
@@ -516,7 +516,6 @@ eOSState cMenuChannels::Delete(void)
         Channels->Del(Channel);
         cOsdMenu::Del(Index);
         Propagate(Channels);
-        Channels->SetModifiedByUser();
         isyslog("channel %d deleted", DeletedChannel);
         Deleted = true;
         if (CurrentChannel && CurrentChannel->Number() != CurrentChannelNr) {
@@ -541,10 +540,14 @@ void cMenuChannels::Move(int From, int To)
      if (FromChannel && ToChannel) {
         int FromNumber = FromChannel->Number();
         int ToNumber = ToChannel->Number();
+        if (Channels->MoveNeedsDecrement(FromChannel, ToChannel)) {
+           ToChannel = Channels->Prev(ToChannel); // cListBase::Move() doesn't know about the channel list's numbered groups!
+           To--;
+           }
         Channels->Move(FromChannel, ToChannel);
         cOsdMenu::Move(From, To);
+        SetCurrent(Get(To));
         Propagate(Channels);
-        Channels->SetModifiedByUser();
         isyslog("channel %d moved to %d", FromNumber, ToNumber);
         if (CurrentChannel && CurrentChannel->Number() != CurrentChannelNr) {
            if (!cDevice::PrimaryDevice()->Replaying() || cDevice::PrimaryDevice()->Transferring())

svdrp.c

@@ -10,7 +10,7 @@
  * and interact with the Video Disk Recorder - or write a full featured
  * graphical interface that sits on top of an SVDRP connection.
  *
- * $Id: svdrp.c 4.39 2019/05/06 15:11:15 kls Exp $
+ * $Id: svdrp.c 4.40 2020/04/11 09:22:05 kls Exp $
  */
 
 #include "svdrp.h"
@@ -2087,6 +2087,8 @@ void cSVDRPServer::CmdMOVC(const char *Option)
                  int FromNumber = FromChannel->Number();
                  int ToNumber = ToChannel->Number();
                  if (FromNumber != ToNumber) {
+                    if (Channels->MoveNeedsDecrement(FromChannel, ToChannel))
+                       ToChannel = Channels->Prev(ToChannel); // cListBase::Move() doesn't know about the channel list's numbered groups!
                     Channels->Move(FromChannel, ToChannel);
                     Channels->ReNumber();
                     Channels->SetModifiedByUser();