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#!/usr/bin/env perl
# $XTermId: sgrPushPop2.pl,v 1.4 2020/12/13 15:05:06 tom Exp $
# -----------------------------------------------------------------------------
# this file is part of xterm
#
# Copyright 2019,2020 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.
# -----------------------------------------------------------------------------
use strict;
use warnings;
use Getopt::Std;
$| = 1;
our ( $opt_b, $opt_n, $opt_r );
$Getopt::Std::STANDARD_HELP_VERSION = 1;
&getopts('bn:r:') || die(
"Usage: $0 [options]\n
Options:\n
-b color backgrounds instead of foregrounds
-n NUM limit test to NUM rows (default: 9)
-r NUM rotate example-columns (e.g, -r1 puts direct-color in middle)
"
);
$opt_n = 9 unless ( defined $opt_n );
$opt_r = 0 unless ( defined $opt_r );
our @xterm_ansi = (
0x000000, #black
0xcd0000, #red3
0x00cd00, #green3
0xcdcd00, #yellow3
0x0000ee, #blue2
0xcd00cd, #magenta3
0x00cdcd, #cyan3
0xe5e5e5 #gray90
);
# The lengths in @example_title differ to ensure that the trailing "END!"
# should be the same color as the middle column, regardless of "-r" rotation.
our $example_title = "COLOR-";
our @example_title = ( "Indexed", "ANSI8", "Direct" );
# demonstrate selective SGR pop by a two-level test where the top-level has
# ANSI colors, while the lower-level iterates over a color test-pattern,
# alternating between direct-color and indexed-colors.
sub choose_fgbg($$) {
my $fg = shift;
my $bg = shift;
my $result = $opt_b ? $bg : $fg;
return $result;
}
sub choose_column($) {
my $code = shift;
return ( $code + $opt_r ) % 3;
}
sub pushSGR($) {
my $params = shift;
printf "\x1b[%s#{", $params;
}
sub popSGR() {
printf "\x1b[#}";
}
sub mark_l() {
printf " {";
}
sub mark_r() {
printf "} ";
}
sub standard_example() {
&mark_l;
my $text = $example_title . $example_title[1];
for my $n ( 0 .. length($text) - 1 ) {
printf "\x1b[%dm", ( $n % 7 ) + 1 + &choose_fgbg( 30, 40 );
printf "%s", substr( $text, $n, 1 );
}
&mark_r;
}
# The first 16 colors of xterm-256's palette match the ANSI+aixterm range.
# Do not imitate the bold-colors.
sub indexed_example() {
&mark_l;
my $text = $example_title . $example_title[0];
for my $n ( 0 .. length($text) - 1 ) {
my $c = ( $n % 7 ) + 1;
printf "\x1b[%d;5:%dm", &choose_fgbg( 38, 48 ), $c;
printf "%s", substr( $text, $n, 1 );
}
&mark_r;
}
# Imitate the "ANSI" colors from xterm's palette.
# (Again bold colors are not imitated here).
sub direct_example() {
&mark_l;
my $text = $example_title . $example_title[2];
for my $n ( 0 .. length($text) - 1 ) {
my $c = ( $n % 7 ) + 1;
my $r = ( $xterm_ansi[$c] / ( 256 * 256 ) ) % 256;
my $g = ( $xterm_ansi[$c] / (256) ) % 256;
my $b = ( $xterm_ansi[$c] ) % 256;
printf "\x1b[%d;2:1:%d:%d:%dm", &choose_fgbg( 38, 48 ), $r, $g, $b;
printf "%s", substr( $text, $n, 1 );
}
&mark_r;
}
sub run_example($) {
my $column = shift;
&indexed_example if ( &choose_column($column) == 0 );
&standard_example if ( &choose_column($column) == 1 );
&direct_example if ( &choose_column($column) == 2 );
}
sub video_name($) {
my $code = shift;
my $result = "?";
$result = "normal" if ( $code == 0 );
$result = "bold" if ( $code == 1 );
$result = "faint" if ( $code == 2 );
$result = "italicized" if ( $code == 3 );
$result = "underlined" if ( $code == 4 );
$result = "blink" if ( $code == 5 );
$result = "inverse" if ( $code == 7 );
$result = "crossed-out" if ( $code == 9 );
$result = "double-underlined" if ( $code == 21 );
return $result;
}
sub reset_video() {
printf "\x1b[m";
}
sub set_video($) {
my $row = shift;
my $param = "";
my $cycle = 9;
$param = 0 if ( ( $row % $cycle ) == 0 );
$param = 1 if ( ( $row % $cycle ) == 1 );
$param = 2 if ( ( $row % $cycle ) == 2 );
$param = 3 if ( ( $row % $cycle ) == 3 );
$param = 4 if ( ( $row % $cycle ) == 4 );
$param = 5 if ( ( $row % $cycle ) == 5 );
$param = 7 if ( ( $row % $cycle ) == 6 );
$param = 9 if ( ( $row % $cycle ) == 7 );
$param = 21 if ( ( $row % $cycle ) == 8 );
printf "%-20s", &video_name($param);
printf "\x1b[%dm", $param;
}
printf "\x1b[H\x1b[J";
&pushSGR("");
printf "\x1b[40;37mSetting ambient colors to white-on-black\n";
# The three columns (indexed, ANSI, direct) will look similar.
&pushSGR("");
printf "Testing white-on-black with columns %s,%s,%s\n",
$example_title[ &choose_column(0) ],
$example_title[ &choose_column(1) ],
$example_title[ &choose_column(2) ];
for my $row ( 0 .. $opt_n ) {
&pushSGR("30;31"); # save/restore only foreground/background color
&set_video($row); # this attribute is set for the whole row
&run_example(0);
&popSGR;
&run_example(1);
&pushSGR("30;31"); # save/restore only foreground/background color
&run_example(2);
&popSGR;
printf "END!"; # this is in the last color used in the middle column
&reset_video();
printf "\n";
}
&popSGR;
printf "The ambient colors should still be white-on-black.\n";
&popSGR;
printf "Now we should be back to whatever it was before we got here.\n";
1;
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