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#!/usr/bin/perl
# $XFree86: xc/programs/xterm/vttests/resize.pl,v 1.1 2004/03/04 02:21:58 dickey Exp $
#
# -- Thomas Dickey (2004/3/3)
# resize.sh rewritten into Perl for comparison.
# See also Term::ReadKey.
use IO::Handle;
sub write_tty {
open TTY, "+</dev/tty" or die("Cannot open /dev/tty\n");
autoflush TTY 1;
print TTY @_;
close TTY;
}
sub get_reply {
open TTY, "+</dev/tty" or die("Cannot open /dev/tty\n");
autoflush TTY 1;
$old=`stty -g`;
system "stty raw -echo min 0 time 5";
print TTY @_;
my $reply=<TTY>;
close TTY;
system "stty $old";
return $reply;
}
sub csi_field {
my $first = @_[0];
my $second = @_[1];
$first =~ s/^[^0-9]+//;
while ( --$second > 0 ) {
$first =~ s/^[\d]+//;
$first =~ s/^[^\d]+//;
}
$first =~ s/[^\d]+.*$//;
return $first;
}
$original=get_reply("\x1b[18t");
if ( $original =~ /\x1b\[8;\d+;\d+t/ ) {
$high=csi_field($original,2);
$wide=csi_field($original,3);
printf "parsed terminal size $high,$wide\n";
} else {
die "Cannot get terminal size via escape sequence\n";
}
#
$maximize=get_reply("\x1b[19t");
if ( $maximize =~ /\x1b\[9;\d+;\d+t/ ) {
$maxhigh=csi_field($maximize,2);
$maxwide=csi_field($maximize,3);
$maxhigh != 0 or $maxhigh = $high * 2;
$maxwide != 0 or $maxwide = $wide * 2;
printf "parsed terminal maxsize $maxhigh,$maxwide\n";
} else {
die "Cannot get terminal size via escape sequence\n";
}
sub catch_zap {
$zapped++;
}
$SIG{INT} = \&catch_zap;
$SIG{QUIT} = \&catch_zap;
$SIG{KILL} = \&catch_zap;
$SIG{HUP} = \&catch_zap;
$SIG{TERM} = \&catch_zap;
$w=$wide;
$h=$high;
$a=1;
$zapped=0;
while ( $zapped == 0 )
{
# sleep 1
printf "resizing to $h by $w\n";
write_tty("\x1b[8;$h;$w" . "t");
if ( $a == 1 ) {
if ( $w == $maxwide ) {
$h += $a;
if ( $h = $maxhigh ) {
$a = -1;
}
} else {
$w += $a;
}
} else {
if ( $w == $wide ) {
$h += $a;
if ( $h = $high ) {
$a=1;
}
} else {
$w += $a;
}
}
}
write_tty($original);
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