From c4377f99fbbb8c95be46b4c6399d1db376688940 Mon Sep 17 00:00:00 2001
From: Hsieh Chin Fan <pham@topo.tw>
Date: Mon, 27 Feb 2023 16:04:51 +0800
Subject: Update timer.sh

---
 bin/unix/countdown.sh | 34 ----------------------------
 bin/unix/stopwatch.sh | 37 ------------------------------
 bin/unix/timer.sh     | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 62 insertions(+), 71 deletions(-)
 delete mode 100755 bin/unix/countdown.sh
 delete mode 100755 bin/unix/stopwatch.sh
 create mode 100755 bin/unix/timer.sh

(limited to 'bin/unix')

diff --git a/bin/unix/countdown.sh b/bin/unix/countdown.sh
deleted file mode 100755
index ca6b5d6..0000000
--- a/bin/unix/countdown.sh
+++ /dev/null
@@ -1,34 +0,0 @@
-#! /bin/bash
-# Ref: https://superuser.com/questions/611538/611582#611582
-
-# If user type '^C', then use SIGINT to toggle the display
-trap '[ "$SHOWGIVEN" = yes ] && SHOWGIVEN= || SHOWGIVEN=yes' SIGINT
-# Do not print "^C" when SIGINT caught
-stty -ctlecho
-
-# Hide the cursor
-tput civis
-
-# Wait user input
-read -p '? ' input
-
-# Modify input to fit the format that `date` can read
-# s -> sec
-# m -> min
-# h -> hour
-[[ "$input" =~ s && ! "$input" =~ sec  ]] && input="$(sed s/s/sec/  <<<"$input")"
-[[ "$input" =~ m && ! "$input" =~ min  ]] && input="$(sed s/m/min/  <<<"$input")"
-[[ "$input" =~ h && ! "$input" =~ hour ]] && input="$(sed s/h/hour/ <<<"$input")"
-
-start=$(date +%s -d "$input")
-while [ "$start" -ge $(date +%s) ]; do
-    ## Is this more than 24h away?
-    time="$(( $start - `date +%s` ))"
-    if [ -z "$SHOWGIVEN" ]; then
-        printf '%s\r' "$(date -u -d @$time +%H:%M:%S)"
-    else 
-        printf '%s\r' "$(date -d "00 + $input" +%H:%M:%S)"
-    fi
-    sleep 0.3
-done
-printf "\e[1;31m$(date -u -d "@$time" +%H:%M:%S)"
diff --git a/bin/unix/stopwatch.sh b/bin/unix/stopwatch.sh
deleted file mode 100755
index 6b76c26..0000000
--- a/bin/unix/stopwatch.sh
+++ /dev/null
@@ -1,37 +0,0 @@
-#! /bin/bash
-# Ref: https://superuser.com/questions/611538/611582#611582
-
-# If user type '^C', then use SIGINT to toggle the display
-trap '[ "$SHOWGIVEN" = yes ] && SHOWGIVEN= || SHOWGIVEN=yes' SIGINT
-# Do not print "^C" when SIGINT caught
-stty -ctlecho
-
-# Hide the cursor
-tput civis
-
-# Wait user input
-read -p '? ' input
-
-# Modify input to fit the format that `date` can read
-# s -> sec
-# m -> min
-# h -> hour
-[[ "$input" =~ s && ! "$input" =~ sec  ]] && input="$(sed s/s/sec/  <<<"$input")"
-[[ "$input" =~ m && ! "$input" =~ min  ]] && input="$(sed s/m/min/  <<<"$input")"
-[[ "$input" =~ h && ! "$input" =~ hour ]] && input="$(sed s/h/hour/ <<<"$input")"
-
-time=0
-start=$(date +%s)
-given=$(date +%s -d "$input")
-stop=$(( $given - $start ))
-while [ $time -ne $stop ]; do
-    time="$(( $(date +%s) - $start ))"
-    if [ -z "$SHOWGIVEN" ]; then
-        printf '%s\r' "$(date -u -d @$time +%H:%M:%S)"
-    else 
-        printf '%s\r' "$(date -u -d @$stop +%H:%M:%S)"
-    fi
-    sleep 0.3
-done
-
-printf "\e[1;31m$(date -u -d "@$time" +%H:%M:%S)"
diff --git a/bin/unix/timer.sh b/bin/unix/timer.sh
new file mode 100755
index 0000000..ac9c858
--- /dev/null
+++ b/bin/unix/timer.sh
@@ -0,0 +1,62 @@
+#! /bin/bash
+# Ref: https://superuser.com/questions/611538/611582#611582
+
+SIGNAL=${1:-SIGTERM}
+
+# If SIGNAL is received, switch to next display
+trap 'next_display' $SIGNAL
+#trap 'toggle_timer' SIGTSTP
+# Do not print "^C" when SIGINT caught
+stty -ctlecho
+
+# Hide the cursor
+tput civis
+
+display_list=(STOPWATCH COUNTDOWN PERIOD)
+export DISPLAY=0
+
+next_display() {
+  export DISPLAY=$(( ($DISPLAY + 1) %${#display_list[@]} ))
+}
+
+export stop=
+toggle_timer() {
+  [ "$stop" = true ] && export stop= || export stop=true
+}
+
+# Wait user input
+read -p '? ' input
+
+# Modify input to fit the format that `date` can read
+# s -> sec
+# m -> min
+# h -> hour
+[[ "$input" =~ s && ! "$input" =~ sec  ]] && input="$(sed s/s/sec/  <<<"$input")"
+[[ "$input" =~ m && ! "$input" =~ min  ]] && input="$(sed s/m/min/  <<<"$input")"
+[[ "$input" =~ h && ! "$input" =~ hour ]] && input="$(sed s/h/hour/ <<<"$input")"
+
+start=$(date +%s)               # unix epoch of start
+given=$(date +%s -d "$input")   # unix epoch of end
+period=$(( $given - $start ))   # seconds for timer
+
+time=0
+while [ $time -ne $period ]; do
+    [ "$stop" = true ] && sleep 0.3 && continue
+
+    time="$(( $(date +%s) - $start ))"
+    case ${display_list[$DISPLAY]} in
+      STOPWATCH)
+        printf '%s\r' "$(date -u -d @$time +%H:%M:%S)"
+        ;;
+      COUNTDOWN)
+        printf '%s\r' "$(date -u -d @$((period - $time)) +%H:%M:%S)"
+        ;;
+      PERIOD)
+        printf '%s\r' "$(date -u -d @$period +%H:%M:%S)"
+        ;;
+    esac
+
+    sleep 0.3
+done
+
+printf "\e[1;31m$(date -u -d "@$time" +%H:%M:%S)"
-- 
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