Tests for 5718.

regress/input-reflow-wide.sh

@@ -0,0 +1,60 @@
+#!/bin/sh
+
+# Wide-character padding must not count towards the reflowed line width.
+
+. ./input-common.inc
+
+check_reflow()
+{
+	# Resizing can move the first physical line into history.
+	$TMUX capture-pane -pN"$2" -t "$1:" -S - -E - |
+	    normalize_capture >"$TMP"
+	printf '%s\n' "${3:-$text}" >"$EXP"
+	cmp "$TMP" "$EXP" || fail "$1 reflow (width $width, flags -pN$2)"
+}
+
+text='中文文档甲   中文文档乙   中文文档丙   中文文档丁   中文文档戊   中文文档己'
+
+# Default and RGB backgrounds exercise compact and extended padding cells.
+for padding in compact extended; do
+	style=''
+	if [ "$padding" = extended ]; then
+		style='\033[48;2;1;2;3m'
+	fi
+	width=96
+	start_pane_history "wide-$padding" 96 18 "${style}${text}\\n"
+	check_reflow "wide-$padding" ''
+	for width in 47 96 47 96; do
+		$TMUX resize-window -t "wide-$padding:" -x "$width" -y 18 ||
+		    exit 1
+		check_reflow "wide-$padding" J
+		if [ "$width" = 96 ]; then
+			check_reflow "wide-$padding" ''
+		fi
+	done
+done
+
+# Include both a split between wide characters and an odd-width boundary.
+text='中文文档'
+start_pane_history boundary 8 18 "${text}\\n"
+for width in 4 8 3 8; do
+	$TMUX resize-window -t boundary: -x "$width" -y 18 || exit 1
+	check_reflow boundary J
+	case "$width" in
+	4)
+		check_reflow boundary '' '中文
+文档'
+		;;
+	3)
+		check_reflow boundary '' '中
+文
+文
+档'
+		;;
+	8)
+		check_reflow boundary ''
+		;;
+	esac
+done
+
+exit $exit_status