From e8be8a52e999b7a9ee4fc935a33ebfefad5bae3a Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Wed, 19 Jul 2023 10:03:33 +0200
Subject: Allow removing the last chain when playing

---
 src/sequencer.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

(limited to 'src/sequencer.c')

diff --git a/src/sequencer.c b/src/sequencer.c
index 9de08f8..038b608 100644
--- a/src/sequencer.c
+++ b/src/sequencer.c
@@ -565,22 +565,27 @@ handle_pattern_chain(void) {
     } else if (key_tap(KEY_B)) {
         if (chain.active[param_selection_loc]) {
             // Can't toggle current chain.
-            if (!play_status || param_selection_loc != chain.current) {
+            if (!play_status
+                    || param_selection_loc != chain.current
+                    || chain.len == 1) {
                 chain.active[param_selection_loc] = 0;
                 chain.len--;
             }
         } else {
+            if (chain.len == 0) {
+                chain.current = param_selection_loc;
+            }
             chain.active[param_selection_loc] = 1;
             chain.len++;
         }
     } else if (key_tap(KEY_L)) {
-        if (chain.active[param_selection_loc] 
+        if (chain.active[param_selection_loc]
                 && chain.chain[param_selection_loc] > 0
                 && (!play_status || param_selection_loc != chain.current)) {
             chain.chain[param_selection_loc]--;
         }
     } else if (key_tap(KEY_R)) {
-        if (chain.active[param_selection_loc] 
+        if (chain.active[param_selection_loc]
                 && chain.chain[param_selection_loc] < 7
                 && (!play_status || param_selection_loc != chain.current)) {
             chain.chain[param_selection_loc]++;
@@ -663,7 +668,7 @@ handle_pattern_selection(void) {
             size_t idx = 15 - i;
             if (chain.active[idx] == 1) {
                 // If the pattern is currently playing it can't be removed.
-                if (play_status && idx == chain.current) {
+                if (play_status && idx == chain.current && chain.len > 1) {
                     continue;
                 } else if (idx == chain.current) {
                     update_current = true;
-- 
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