540 lines
14 KiB
Perl
540 lines
14 KiB
Perl
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#!/usr/bin/env perl
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# $XTermId: xtra-scroll.pl,v 1.12 2021/09/03 18:34:50 tom Exp $
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# -----------------------------------------------------------------------------
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# this file is part of xterm
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#
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# Copyright 2021 by Thomas E. Dickey
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#
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# All Rights Reserved
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
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# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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# Except as contained in this notice, the name(s) of the above copyright
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# holders shall not be used in advertising or otherwise to promote the
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# sale, use or other dealings in this Software without prior written
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# authorization.
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# -----------------------------------------------------------------------------
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# Interactively test screen-updates which can exercise the cdXtraScroll and
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# tiXtraScroll features.
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use strict;
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use warnings;
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use Getopt::Std;
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use Term::ReadKey;
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use I18N::Langinfo qw(langinfo CODESET);
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$! = 1;
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our $target = "";
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our $encoding = lc( langinfo( CODESET() ) );
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our ($opt_8);
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our $dirty = 1; # nonzero if the screen should be painted
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our $mode_margin = 0; # nonzero if left/right margin mode enabled
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our $mode_origin = 0; # nonzero if origin-mode in effect
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our $mode_screen = 0; # nonzero if using alternate screen
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our $pos_x = 0; # current cursor-Y, absolute
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our $pos_y = 0; # current cursor-X, absolute
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our $term_high; # terminal's height
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our $term_wide; # terminal's width
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our $CSI = "\x1b[";
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our $crlf = "\r\n";
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our $text_sample = "THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG ";
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our $text_filler = "";
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our %margins;
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sub raw() {
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ReadMode 'ultra-raw', 'STDIN'; # allow single-character inputs
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}
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sub cooked() {
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ReadMode 'normal';
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}
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sub utf8_sample() {
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my $text = "";
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for my $n ( 0 .. length($text_sample) ) {
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my $chr = substr( $text_sample, $n, 1 );
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if ( $chr eq " " ) {
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$chr = " ";
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}
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elsif ( ord($chr) < 32 ) {
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# leave control characters as-is
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}
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else {
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$chr = chr( 0xff00 + ord($chr) - 32 );
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}
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$text .= $chr;
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}
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return $text;
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}
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sub next_x($) {
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my $value = shift;
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if ($mode_margin) {
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$value = $margins{R} if ( $value < $margins{R} );
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$value = $margins{L} if ( $value > $margins{L} );
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}
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else {
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$value = $value % $term_wide;
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}
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return $value;
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}
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sub next_y($) {
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my $value = shift;
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if ($mode_origin) {
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$value = $margins{B} if ( $value < $margins{T} );
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$value = $margins{T} if ( $value > $margins{B} );
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}
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else {
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$value = $value % $term_high;
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}
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return $value;
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}
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sub move() {
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my $y = $pos_y;
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if ($mode_origin) {
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my $min_y = ( $margins{T} >= 0 ) ? $margins{T} : 0;
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my $two_y = $min_y + 1; # scrolling region is at least 2 lines
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my $max_y = ( $margins{B} >= $two_y ) ? $margins{B} : $two_y;
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$y = $max_y if ( $y > $max_y );
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$y -= $min_y; # convert to relative ordinate
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}
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$y = 0 if ( $y < 0 );
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printf STDERR "%s%d;%dH", $CSI, 1 + $y, 1 + $pos_x;
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}
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sub home() {
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printf STDERR "%sH", $CSI;
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$pos_x = 0;
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$pos_y = 0;
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&move;
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}
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sub erase_display($) {
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my $mode = shift;
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printf STDERR "%s%sJ", $CSI, $mode;
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}
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sub erase_line($) {
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my $mode = shift;
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printf STDERR "%s%sK", $CSI, $mode;
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}
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sub toggle($) {
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my $value = shift;
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return ( $value == 0 ) ? 1 : 0;
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}
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################################################################################
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sub set_margin_mode($) {
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my $mode = shift;
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printf STDERR "%s?69%s", $CSI, ( $mode == 0 ) ? "l" : "h";
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$mode_margin = $mode;
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}
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################################################################################
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sub set_origin_mode($) {
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my $mode = shift;
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printf STDERR "%s?6%s", $CSI, ( $mode == 0 ) ? "l" : "h";
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$mode_origin = $mode;
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}
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################################################################################
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sub set_screen_mode($) {
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my $mode = shift;
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printf STDERR "%s?1049%s", $CSI, ( $mode == 0 ) ? "l" : "h";
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$mode_screen = $mode;
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}
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################################################################################
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sub do_tb_margins($$) {
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my $param_T = "";
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my $param_B = "";
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$param_T = sprintf( "%d", 1 + $margins{T} ) if ( $margins{T} >= 0 );
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$param_B = sprintf( "%d", 1 + $margins{B} )
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if ( $margins{B} > $margins{T} );
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printf STDERR "%s%s;%sr", $CSI, $param_T, $param_B;
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&move;
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}
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sub undo_tb_margins() {
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&do_tb_margins( -1, -1 );
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}
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sub redo_tb_margins() {
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&do_tb_margins( $margins{T}, $margins{B} );
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}
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sub set_tb_margins($$) {
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my $reset = ( not defined $margins{T} or not defined $margins{B} ) ? 1 : 0;
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my $old_T = 1;
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my $old_B = $term_high;
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$old_T = $margins{T} if ( defined $margins{T} );
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$old_B = $margins{B} if ( defined $margins{B} );
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$margins{T} = shift;
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$margins{B} = shift;
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if ( $reset == 0 ) {
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$reset = 1 if ( $old_T != $margins{T} );
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$reset = 1 if ( $old_B != $margins{B} );
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}
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&redo_tb_margins if ( $reset == 1 );
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}
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################################################################################
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sub do_lr_margins($$) {
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my $param_L = "";
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my $param_R = "";
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$param_L = sprintf( "%d", 1 + $margins{L} ) if ( $margins{L} >= 0 );
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$param_R = sprintf( "%d", 1 + $margins{R} )
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if ( $margins{R} > $margins{T} );
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printf STDERR "%s%s;%ss", $CSI, $param_L, $param_R;
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&move;
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}
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sub undo_lr_margins() {
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&do_lr_margins( -1, -1 );
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}
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sub redo_lr_margins() {
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&do_lr_margins( $margins{L}, $margins{R} );
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}
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sub set_lr_margins($$) {
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my $reset = ( not defined $margins{L} or not defined $margins{R} ) ? 1 : 0;
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my $old_L = 1;
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my $old_R = $term_high;
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$old_L = $margins{L} if ( defined $margins{L} );
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$old_R = $margins{R} if ( defined $margins{R} );
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$margins{L} = shift;
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$margins{R} = shift;
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if ( $reset == 0 ) {
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$reset = 1 if ( $old_L != $margins{L} );
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$reset = 1 if ( $old_R != $margins{R} );
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}
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&redo_lr_margins if ( $reset == 1 );
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}
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################################################################################
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sub has_tb_margins() {
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my $result = 0;
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$result = 1 if ( $margins{T} != 1 );
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$result = 1 if ( $margins{B} != $term_high );
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return $result;
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}
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sub repaint($) {
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my $erase = shift;
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my $save_x = $pos_x;
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my $save_y = $pos_y;
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$dirty = 0;
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if ($erase) {
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&home;
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&erase_display(2);
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}
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if ( $text_filler ne "" ) {
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if ( $mode_origin and &has_tb_margins ) {
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my @rows = split /$crlf/, $text_filler;
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for my $row ( 0 .. $#rows ) {
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next unless ( $row >= $margins{T} );
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next unless ( $row <= $margins{B} );
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printf STDERR "%s$crlf", $rows[$row];
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}
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}
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else {
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printf STDERR "%s$crlf", $text_filler;
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}
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}
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else {
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my $cells = 0;
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my $limit = $term_high * $term_wide;
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while ( $cells < $limit ) {
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my $sample = ( $encoding eq "utf-8" ) ? &utf8_sample : $text_sample;
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printf STDERR "%s", $sample;
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$cells += length($sample);
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}
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}
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$pos_x = $save_x;
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$pos_y = $save_y;
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&move;
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}
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sub initialize() {
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if ( $encoding eq "utf-8" ) {
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binmode( STDOUT, ":utf8" );
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binmode( STDERR, ":utf8" );
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}
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if ($opt_8) {
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if ( $encoding eq "utf-8" ) {
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undef $opt_8;
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printf "...ignoring -8 option since locale uses %s\n", $encoding;
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}
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else {
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printf STDERR "\x1b G";
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$CSI = "\x9b";
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}
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}
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&raw;
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my @term_size = GetTerminalSize( \*STDERR );
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$term_wide = 80;
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$term_wide = $term_size[0] if ( $#term_size >= 0 );
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$term_wide = 80 if ( $term_wide <= 0 );
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$term_high = 24;
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$term_high = $term_size[1] if ( $#term_size >= 1 );
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$term_high = 24 if ( $term_high <= 0 );
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&set_margin_mode(0);
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&set_origin_mode(0);
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&set_screen_mode(0);
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&set_tb_margins( -1, -1 );
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&set_lr_margins( 1, $term_wide );
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&home;
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&erase_display("2");
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}
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sub cleanup() {
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&cooked;
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printf STDERR "\x1b F" if ($opt_8);
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&set_margin_mode(0);
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&set_origin_mode(0);
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&set_screen_mode(0);
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&undo_tb_margins;
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$pos_x = 1;
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$pos_y = $term_high - 2;
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&move;
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&erase_display("");
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}
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sub beep() {
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printf STDERR "\a";
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}
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sub main::HELP_MESSAGE() {
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printf STDERR <<EOF
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Usage: $0 [options] [datafile]
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Options:
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-8 use 8-bit controls
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EOF
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;
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exit 1;
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}
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$Getopt::Std::STANDARD_HELP_VERSION = 1;
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&getopts('8') || &main::HELP_MESSAGE;
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$#ARGV <= 0 || &main::HELP_MESSAGE;
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# provide for reading file containing text to repaint
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if ( $#ARGV == 0 ) {
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if ( open( FP, $ARGV[0] ) ) {
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my @lines = <FP>;
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chomp @lines;
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close FP;
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$text_filler = join( $crlf, @lines );
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}
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}
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printf "encoding $encoding\n";
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&initialize();
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|
||
|
|
while (1) {
|
||
|
|
my $cmd;
|
||
|
|
|
||
|
|
printf "\r\nCommand (? for help):" if ( $dirty != 0 );
|
||
|
|
$cmd = ReadKey 0;
|
||
|
|
if ( not $cmd ) {
|
||
|
|
sleep 1;
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "?" ) {
|
||
|
|
$dirty = 1;
|
||
|
|
&home;
|
||
|
|
&erase_display(2);
|
||
|
|
printf $crlf
|
||
|
|
. "General:"
|
||
|
|
. $crlf
|
||
|
|
. " ? (help),"
|
||
|
|
. " q (quit)"
|
||
|
|
. $crlf
|
||
|
|
. "Clear:"
|
||
|
|
. $crlf
|
||
|
|
. " C (entire screen),"
|
||
|
|
. " c (screen-below),"
|
||
|
|
. " E (entire line),"
|
||
|
|
. " e (line-right)"
|
||
|
|
. $crlf . "Fill:"
|
||
|
|
. $crlf
|
||
|
|
. " @ (margin-box),"
|
||
|
|
. " # (prompt-char)"
|
||
|
|
. $crlf
|
||
|
|
. "Move cursor:\r\n"
|
||
|
|
. " h,j,k,l (vi-like),"
|
||
|
|
. " H (to home)."
|
||
|
|
. $crlf
|
||
|
|
. "Set margin using current position:"
|
||
|
|
. $crlf
|
||
|
|
. " T (top),"
|
||
|
|
. " B (bottom),"
|
||
|
|
. " L (left),"
|
||
|
|
. " R (right)"
|
||
|
|
. $crlf
|
||
|
|
. "Reset modes"
|
||
|
|
. $crlf
|
||
|
|
. " M (margins)"
|
||
|
|
. $crlf
|
||
|
|
. "Toggle modes"
|
||
|
|
. $crlf
|
||
|
|
. " A (alternate-screen),"
|
||
|
|
. " O (origin-mode)"
|
||
|
|
. " | (left/right-mode)"
|
||
|
|
. $crlf
|
||
|
|
. "Print sample:"
|
||
|
|
. " form-feed (repaint)";
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "\033" ) {
|
||
|
|
|
||
|
|
# try to ignore special-keys
|
||
|
|
my $count = 0;
|
||
|
|
while (1) {
|
||
|
|
$cmd = ReadKey 0;
|
||
|
|
$count++;
|
||
|
|
next if ( $count == 1 and $cmd eq "O" );
|
||
|
|
next unless ( $cmd =~ /^[A-~]$/ );
|
||
|
|
$cmd = ReadKey 0;
|
||
|
|
last;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "q" ) {
|
||
|
|
last;
|
||
|
|
}
|
||
|
|
elsif ( index( "CcEe@#hjklHMTBLRAO|\f", $cmd ) >= 0 ) {
|
||
|
|
my $was_dirty = $dirty;
|
||
|
|
&repaint(1) if ( $dirty != 0 );
|
||
|
|
if ( $cmd eq "C" ) {
|
||
|
|
&home;
|
||
|
|
&erase_display("2");
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "c" ) {
|
||
|
|
&erase_display("");
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "E" ) {
|
||
|
|
&erase_line("2");
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "e" ) {
|
||
|
|
&erase_line("");
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "@" ) {
|
||
|
|
|
||
|
|
# FIXME
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "#" ) {
|
||
|
|
$text_sample = ReadKey 0;
|
||
|
|
if ( $text_filler ne "" ) {
|
||
|
|
my $save_filler = $text_filler;
|
||
|
|
$text_filler =~ s/[^\d\s]/$text_sample/g;
|
||
|
|
&repaint(0);
|
||
|
|
$text_filler = $save_filler;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
&repaint(0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "h" ) {
|
||
|
|
$pos_x = &next_x( $pos_x - 1 );
|
||
|
|
&move;
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "j" ) {
|
||
|
|
$pos_y = &next_y( $pos_y + 1 );
|
||
|
|
&move;
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "k" ) {
|
||
|
|
$pos_y = &next_y( $pos_y - 1 );
|
||
|
|
&move;
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "l" ) {
|
||
|
|
$pos_x = &next_x( $pos_x + 1 );
|
||
|
|
&move;
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "H" ) {
|
||
|
|
&home;
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "M" ) {
|
||
|
|
&set_tb_margins( -1, -1 );
|
||
|
|
&set_lr_margins( -1, -1 );
|
||
|
|
&repaint(0);
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "T" ) {
|
||
|
|
&set_tb_margins( $pos_y, $margins{B} );
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "B" ) {
|
||
|
|
&set_tb_margins( $margins{T}, $pos_y );
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "L" ) {
|
||
|
|
&set_lr_margins( $pos_x, $margins{R} );
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "R" ) {
|
||
|
|
&set_lr_margins( $margins{L}, $pos_x );
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "A" ) {
|
||
|
|
&set_screen_mode( &toggle($mode_screen) );
|
||
|
|
&repaint(1);
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "O" ) {
|
||
|
|
&set_origin_mode( &toggle($mode_origin) );
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "|" ) {
|
||
|
|
&set_margin_mode( &toggle($mode_margin) );
|
||
|
|
}
|
||
|
|
elsif ( $cmd eq "\f" ) {
|
||
|
|
&repaint(1) unless ($was_dirty);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
&beep;
|
||
|
|
$dirty = 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
&beep;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
&cleanup;
|
||
|
|
printf " ...quit\r\n";
|
||
|
|
|
||
|
|
1;
|