Add a test.

regress/format-list-empty.sh

@@ -0,0 +1,89 @@
+#!/bin/sh
+
+# Text before and after an empty or completely trimmed list is drawn with
+# the selected alignment, including mouse ranges in the surviving text.
+
+PATH=/bin:/usr/bin
+TERM=screen
+LC_ALL=C.UTF-8
+export PATH TERM LC_ALL
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -LtestA$$ -f/dev/null"
+TMUX2="$TEST_TMUX -LtestB$$ -f/dev/null"
+
+cleanup()
+{
+	$TMUX2 kill-server >/dev/null 2>&1
+	$TMUX kill-server >/dev/null 2>&1
+}
+trap cleanup 0 1 15
+
+check()
+{
+	$TMUX set -g 'status-format[0]' "$1" || exit 1
+	i=0
+	while [ "$i" -lt 50 ]; do
+		got=$($TMUX2 capture-pane -p -t outer:0.0 | head -n 1)
+		[ "$got" = "$2" ] && return
+		sleep 0.1
+		i=$((i + 1))
+	done
+	echo "format '$1': got '$got', expected '$2'" >&2
+	exit 1
+}
+
+click()
+{
+	$TMUX set -g @clicked none || exit 1
+	seq=$(printf '\033[<0;%s;1M\033[<0;%s;1m' "$1" "$1")
+	$TMUX2 send-keys -t outer:0.0 -l "$seq" || exit 1
+	i=0
+	while [ "$i" -lt 50 ]; do
+		got=$($TMUX show -gv @clicked)
+		[ "$got" = "$2" ] && break
+		sleep 0.1
+		i=$((i + 1))
+	done
+	[ "$got" = "$2" ] || {
+		echo "column $1: range '$got', expected '$2'" >&2
+		exit 1
+	}
+	sleep 0.5
+}
+
+$TMUX new-session -d -s inner -x 20 -y 8 'sleep 100' || exit 1
+$TMUX set -g status-position top || exit 1
+$TMUX set -g mouse on || exit 1
+$TMUX bind -n MouseDown1Status \
+    set -gF @clicked '#{mouse_status_range}' || exit 1
+$TMUX2 new-session -d -s outer -x 20 -y 8 'sleep 100' || exit 1
+$TMUX2 set -g status off || exit 1
+$TMUX2 respawn-pane -k -t outer:0.0 "$TMUX attach -t inner" || exit 1
+sleep 1
+
+for align in left centre right; do
+	case "$align" in
+	left) padding=0 ;;
+	centre) padding=7 ;;
+	right) padding=13 ;;
+	esac
+	want="$(printf '%*s' "$padding" '')prepost"
+	format="#[align=$align,range=user|pre]pre#[norange]"
+	format=$format'#[list=on]#[nolist]'
+	format=$format'#[range=user|post]post#[norange]'
+	check "$format" "$want"
+	click "$((padding + 1))" pre
+	click "$((padding + 4))" post
+
+	# The list has text and a range, but no room remains for it.
+	format="#[align=$align,range=user|pre]0123456789#[norange]"
+	format=$format'#[list=on]#[range=user|hidden]'
+	format=$format'HHHHHHHHHHHHHHHHHHHH#[norange]#[nolist]'
+	format=$format'#[range=user|post]abcdefghij#[norange]'
+	check "$format" 0123456789abcdefghij
+	click 1 pre
+	click 11 post
+done
+
+exit 0