From 1b1465a6775c1f53d1f7ef5ef13c7efdbc42a74a Mon Sep 17 00:00:00 2001
From: Klaus Schmidinger <vdr@tvdr.de>
Date: Tue, 19 Jan 2021 13:21:51 +0100
Subject: Now making sure a spawned timer only fully overlaps the given event

---
 CONTRIBUTORS |  2 ++
 HISTORY      |  4 +++-
 timers.c     | 16 +++++++++++++---
 3 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 0586bd79..208f106e 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -3665,6 +3665,8 @@ J
  event has no short text
  for reporting a bug in VPS handling when spawning a pattern timer, in case Setup.UseVps
  is false
+ for reporting an endless spawning of pattern timers in case the spawned timer doesn't
+ use VPS and fully overlaps a second event that is longer than the original one
 
 Stefan Verse <Verse@amotronics.de>
  for fixing an occasional black screen when switching channels
diff --git a/HISTORY b/HISTORY
index 4e163508..d019d608 100644
--- a/HISTORY
+++ b/HISTORY
@@ -9578,7 +9578,7 @@ Video Disk Recorder Revision History
   given (reported by Manuel Reimer).
 - Fixed handling $(PKG_CONFIG) in newplugin (thanks to Winfried Köhler).
 
-2021-01-18:
+2021-01-19:
 
 - Fixed strreplace() to handle NULL strings (reported by Jürgen Schneider).
 - Somewhere down the road the 'x' bit of Doxyfile.filter got lost, so the
@@ -9601,3 +9601,5 @@ Video Disk Recorder Revision History
   (thanks to Peter Bieringer).
 - Fixed setting the 'title' of a recording's info to the recording's name if there
   is no info file (the change in version 1.7.28 broke the fallback to the old 'summary.vdr').
+- Now making sure a spawned timer only fully overlaps the given event (reported by
+  Jürgen Schneider).
diff --git a/timers.c b/timers.c
index 02c08969..5c794309 100644
--- a/timers.c
+++ b/timers.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: timers.c 5.4 2021/01/15 13:52:40 kls Exp $
+ * $Id: timers.c 5.5 2021/01/19 13:21:51 kls Exp $
  */
 
 #include "timers.h"
@@ -191,8 +191,18 @@ cTimer::cTimer(const cEvent *Event, const char *FileName, const cTimer *PatternT
   time_t tstart = (flags & tfVps) ? Event->Vps() : Event->StartTime();
   time_t tstop = tstart + Event->Duration();
   if (!(HasFlags(tfVps))) {
-     tstop  += Setup.MarginStop * 60;
-     tstart -= Setup.MarginStart * 60;
+     int MarginStart = Setup.MarginStart * 60;
+     int MarginStop  = Setup.MarginStop * 60;
+     if (PatternTimer) {
+        // To make sure a spawned timer gets assigned to the correct event, we must
+        // make sure that this is the only event that overlaps 100%:
+        if (const cEvent *e = dynamic_cast<const cEvent *>(Event->Prev()))
+           MarginStart = max(0, min(MarginStart, e->Duration() - 60));
+        if (const cEvent *e = dynamic_cast<const cEvent *>(Event->Next()))
+           MarginStop = max(0, min(MarginStop, e->Duration() - 60));
+        }
+     tstart -= MarginStart;
+     tstop  += MarginStop;
      }
   struct tm tm_r;
   struct tm *time = localtime_r(&tstart, &tm_r);
-- 
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