Create a script to show an ANSI file centered in the terminal

terminal-wallpaper.sh

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+#!/bin/sh
+
+# Clear screen
+# echo -e "\033[2J"
+clear
+
+TERMINAL_WALLPAPER=/home/io/Projects/textual-paint/samples/galaxies.ans
+# Draw terminal background (basic)
+# cat $TERMINAL_WALLPAPER
+
+# Split lines of terminal background into array
+IFS=$'\n' read -d '' -r -a lines < $TERMINAL_WALLPAPER
+
+# # Strips ANSI codes from text
+# # 1: The text
+# # >: The ANSI stripped text
+# function strip_ansi() {
+#   shopt -s extglob # function uses extended globbing
+#   printf %s "${1//$'\e'\[*([0-9;])m/}"
+# }
+
+# Measure image size
+image_height=${#lines[@]}
+image_width=0
+for (( y=0; y<$image_height; y++ )); do
+	line=${lines[$y]}
+	# Have to strip ANSI escape sequences from line length
+	# line_width=50
+	line_length=${#line}
+	# line_width=$(echo $line | sed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]//g" | wc -c)
+	filtered_line=$(sed -r "s/\x1B\[[0-9;]*[mK]//g" <<< "$line")
+	# line_width=$(echo "$filtered_line" | wc -c)
+	# line_width=$(strip_ansi "$line" | wc -c)
+	line_width=${#filtered_line}
+
+	# echo "y=$y line         : $line line_length=$line_length line_width=$line_width"
+	# echo "y=$y filtered line: $filtered_line"
+
+	# echo "stripped: $(strip_ansi "$line") $(strip_ansi "$line" | wc -c)"
+	if [[ $line_width -gt $image_width ]]; then
+		image_width=$line_width
+	fi
+done
+# echo "image_width: $image_width"
+# echo "image_height: $image_height"
+# Draw background centered
+terminal_width=$(tput cols)
+terminal_height=$(tput lines)
+offset_x=$(( ($terminal_width - $image_width) / 2 ))
+offset_y=$(( ($terminal_height - $image_height) / 2 ))
+# echo "terminal_width: $terminal_width terminal_height: $terminal_height offset_x: $offset_x offset_y: $offset_y"
+# ensure offset is positive
+if [[ $offset_x -lt 0 ]]; then
+	offset_x=0
+fi
+if [[ $offset_y -lt 0 ]]; then
+	offset_y=0
+fi
+for (( i=0; i<$image_height; i++ )); do
+  
+  tput cup $(( $offset_y + $i )) $offset_x
+  echo -e "${lines[$i]}"
+done
+
+# Reset cursor position
+echo -e "\033[0;0H"