sync code with last improvements from OpenBSD

app/xterm/vttests/resize.sh

@@ -0,0 +1,109 @@
+#!/bin/sh
+# $XTermId: resize.sh,v 1.25 2022/04/25 08:19:38 tom Exp $
+# -----------------------------------------------------------------------------
+# this file is part of xterm
+#
+# Copyright 1999-2021,2022 by Thomas E. Dickey
+#
+#                         All Rights Reserved
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+# Except as contained in this notice, the name(s) of the above copyright
+# holders shall not be used in advertising or otherwise to promote the
+# sale, use or other dealings in this Software without prior written
+# authorization.
+# -----------------------------------------------------------------------------
+# Obtain the current screen size, then resize the terminal to the nominal
+# screen width/height, and restore the size.
+
+ESC=""
+CSI="${ESC}["
+CMD='/bin/echo'
+OPT='-n'
+SUF=''
+: "${TMPDIR=/tmp}"
+TMP=`(mktemp "$TMPDIR/xterm.XXXXXXXX") 2>/dev/null` || TMP="$TMPDIR/xterm$$"
+eval '$CMD $OPT >$TMP || echo fail >$TMP' 2>/dev/null
+{ test ! -f "$TMP" || test -s "$TMP"; } &&
+for verb in "printf" "print" ; do
+    rm -f "$TMP"
+    eval '$verb "\c" >$TMP || echo fail >$TMP' 2>/dev/null
+    if test -f "$TMP" ; then
+	if test ! -s "$TMP" ; then
+	    CMD="$verb"
+	    OPT=
+	    SUF='\c'
+	    break
+	fi
+    fi
+done
+rm -f "$TMP"
+
+exec </dev/tty
+old=`stty -g`
+stty raw -echo min 0  time 5
+
+$CMD $OPT "${CSI}18t${SUF}" > /dev/tty
+IFS=';' read -r junk high wide
+
+$CMD $OPT "${CSI}19t${SUF}" > /dev/tty
+IFS=';' read -r junk maxhigh maxwide
+
+stty $old
+
+wide=`echo "$wide"|sed -e 's/t.*//'`
+maxwide=`echo "$maxwide"|sed -e 's/t.*//'`
+original=${CSI}8\;${high}\;${wide}t${SUF}
+
+test "$maxwide" = 0 && maxwide=`expr "$wide" \* 2`
+test "$maxhigh" = 0 && maxhigh=`expr "$high" \* 2`
+
+trap '$CMD $OPT "$original" >/dev/tty; exit 1' 1 2 3 15
+trap '$CMD $OPT "$original" >/dev/tty' 0
+
+w=$wide
+h=$high
+a=1
+while true
+do
+#	sleep 1
+	echo "resizing to $h by $w"
+	$CMD $OPT "${CSI}8;${h};${w}t" >/dev/tty
+	if test $a = 1 ; then
+		if test "$w" = "$maxwide" ; then
+			h=`expr "$h" + "$a"`
+			if test "$h" = "$maxhigh" ; then
+				a=-1
+			fi
+		else
+			w=`expr "$w" + "$a"`
+		fi
+	else
+		if test "$w" = "$wide" ; then
+			h=`expr "$h" + "$a"`
+			if test "$h" = "$high" ; then
+				a=1
+			fi
+		else
+			w=`expr "$w" + "$a"`
+		fi
+	fi
+done