resize.sh revision 0bd37d32 
1#!/bin/sh
2# $XTermId: resize.sh,v 1.17 2011/12/11 16:21:22 tom Exp $
3# -----------------------------------------------------------------------------
4# this file is part of xterm
5#
6# Copyright 1999-2003,2011 by Thomas E. Dickey
7# 
8#                         All Rights Reserved
9# 
10# Permission is hereby granted, free of charge, to any person obtaining a
11# copy of this software and associated documentation files (the
12# "Software"), to deal in the Software without restriction, including
13# without limitation the rights to use, copy, modify, merge, publish,
14# distribute, sublicense, and/or sell copies of the Software, and to
15# permit persons to whom the Software is furnished to do so, subject to
16# the following conditions:
17# 
18# The above copyright notice and this permission notice shall be included
19# in all copies or substantial portions of the Software.
20# 
21# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
24# IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
25# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
26# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
27# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28# 
29# Except as contained in this notice, the name(s) of the above copyright
30# holders shall not be used in advertising or otherwise to promote the
31# sale, use or other dealings in this Software without prior written
32# authorization.
33# -----------------------------------------------------------------------------
34# Obtain the current screen size, then resize the terminal to the nominal
35# screen width/height, and restore the size.
36
37ESC=""
38CMD='/bin/echo'
39OPT='-n'
40SUF=''
41TMP=/tmp/xterm$$
42eval '$CMD $OPT >$TMP || echo fail >$TMP' 2>/dev/null
43( test ! -f $TMP || test -s $TMP ) &&
44for verb in printf print ; do
45    rm -f $TMP
46    eval '$verb "\c" >$TMP || echo fail >$TMP' 2>/dev/null
47    if test -f $TMP ; then
48	if test ! -s $TMP ; then
49	    CMD="$verb"
50	    OPT=
51	    SUF='\c'
52	    break
53	fi
54    fi
55done
56rm -f $TMP
57
58exec </dev/tty
59old=`stty -g`
60stty raw -echo min 0  time 5
61
62$CMD $OPT "${ESC}[18t${SUF}" > /dev/tty
63IFS=';' read junk high wide
64
65$CMD $OPT "${ESC}[19t${SUF}" > /dev/tty
66IFS=';' read junk maxhigh maxwide
67
68stty $old
69
70wide=`echo $wide|sed -e 's/t.*//'`
71maxwide=`echo $maxwide|sed -e 's/t.*//'`
72original=${ESC}[8\;${high}\;${wide}t${SUF}
73
74test $maxwide = 0 && maxwide=`expr $wide \* 2`
75test $maxhigh = 0 && maxhigh=`expr $high \* 2`
76
77if ( trap "echo exit" EXIT 2>/dev/null ) >/dev/null
78then
79    trap '$CMD $OPT "$original" >/dev/tty; exit' EXIT HUP INT TRAP TERM
80else
81    trap '$CMD $OPT "$original" >/dev/tty; exit' 0    1   2   5    15
82fi
83
84w=$wide
85h=$high
86a=1
87while true
88do
89#	sleep 1
90	echo resizing to $h by $w
91	$CMD $OPT "${ESC}[8;${h};${w}t" >/dev/tty
92	if test $a = 1 ; then
93		if test $w = $maxwide ; then
94			h=`expr $h + $a`
95			if test $h = $maxhigh ; then
96				a=-1
97			fi
98		else
99			w=`expr $w + $a`
100		fi
101	else
102		if test $w = $wide ; then
103			h=`expr $h + $a`
104			if test $h = $high ; then
105				a=1
106			fi
107		else
108			w=`expr $w + $a`
109		fi
110	fi
111done
112