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Diffstat (limited to 'Master/tlpkg/installer/perllib/Pod/Text/Overstrike.pm')
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diff --git a/Master/tlpkg/installer/perllib/Pod/Text/Overstrike.pm b/Master/tlpkg/installer/perllib/Pod/Text/Overstrike.pm new file mode 100644 index 00000000000..8ba918396c1 --- /dev/null +++ b/Master/tlpkg/installer/perllib/Pod/Text/Overstrike.pm @@ -0,0 +1,208 @@ +# Pod::Text::Overstrike -- Convert POD data to formatted overstrike text +# $Id: Overstrike.pm,v 1.10 2002/08/04 03:35:01 eagle Exp $ +# +# Created by Joe Smith <Joe.Smith@inwap.com> 30-Nov-2000 +# (based on Pod::Text::Color by Russ Allbery <rra@stanford.edu>) +# +# This program is free software; you may redistribute it and/or modify it +# under the same terms as Perl itself. +# +# This was written because the output from: +# +# pod2text Text.pm > plain.txt; less plain.txt +# +# is not as rich as the output from +# +# pod2man Text.pm | nroff -man > fancy.txt; less fancy.txt +# +# and because both Pod::Text::Color and Pod::Text::Termcap are not device +# independent. + +############################################################################## +# Modules and declarations +############################################################################## + +package Pod::Text::Overstrike; + +require 5.004; + +use Pod::Text (); + +use strict; +use vars qw(@ISA $VERSION); + +@ISA = qw(Pod::Text); + +# Don't use the CVS revision as the version, since this module is also in Perl +# core and too many things could munge CVS magic revision strings. This +# number should ideally be the same as the CVS revision in podlators, however. +$VERSION = 1.10; + + +############################################################################## +# Overrides +############################################################################## + +# Make level one headings bold, overridding any existing formatting. +sub cmd_head1 { + my ($self, $text, $line) = @_; + $text =~ s/\s+$//; + $text = $self->strip_format ($self->interpolate ($text, $line)); + $text =~ s/(.)/$1\b$1/g; + $self->SUPER::cmd_head1 ($text); +} + +# Make level two headings bold, overriding any existing formatting. +sub cmd_head2 { + my ($self, $text, $line) = @_; + $text =~ s/\s+$//; + $text = $self->strip_format ($self->interpolate ($text, $line)); + $text =~ s/(.)/$1\b$1/g; + $self->SUPER::cmd_head2 ($text); +} + +# Make level three headings underscored, overriding any existing formatting. +sub cmd_head3 { + my ($self, $text, $line) = @_; + $text =~ s/\s+$//; + $text = $self->strip_format ($self->interpolate ($text, $line)); + $text =~ s/(.)/_\b$1/g; + $self->SUPER::cmd_head3 ($text); +} + +# Level four headings look like level three headings. +sub cmd_head4 { + my ($self, $text, $line) = @_; + $text =~ s/\s+$//; + $text = $self->strip_format ($self->interpolate ($text, $line)); + $text =~ s/(.)/_\b$1/g; + $self->SUPER::cmd_head4 ($text); +} + +# The common code for handling all headers. We have to override to avoid +# interpolating twice and because we don't want to honor alt. +sub heading { + my ($self, $text, $line, $indent, $marker) = @_; + $self->item ("\n\n") if defined $$self{ITEM}; + $text .= "\n" if $$self{loose}; + my $margin = ' ' x ($$self{margin} + $indent); + $self->output ($margin . $text . "\n"); +} + +# Fix the various formatting codes. +sub seq_b { local $_ = strip_format (@_); s/(.)/$1\b$1/g; $_ } +sub seq_f { local $_ = strip_format (@_); s/(.)/_\b$1/g; $_ } +sub seq_i { local $_ = strip_format (@_); s/(.)/_\b$1/g; $_ } + +# Output any included code in bold. +sub output_code { + my ($self, $code) = @_; + $code =~ s/(.)/$1\b$1/g; + $self->output ($code); +} + +# We unfortunately have to override the wrapping code here, since the normal +# wrapping code gets really confused by all the backspaces. +sub wrap { + my $self = shift; + local $_ = shift; + my $output = ''; + my $spaces = ' ' x $$self{MARGIN}; + my $width = $$self{width} - $$self{MARGIN}; + while (length > $width) { + # This regex represents a single character, that's possibly underlined + # or in bold (in which case, it's three characters; the character, a + # backspace, and a character). Use [^\n] rather than . to protect + # against odd settings of $*. + my $char = '(?:[^\n][\b])?[^\n]'; + if (s/^((?>$char){0,$width})(?:\Z|\s+)//) { + $output .= $spaces . $1 . "\n"; + } else { + last; + } + } + $output .= $spaces . $_; + $output =~ s/\s+$/\n\n/; + $output; +} + +############################################################################## +# Utility functions +############################################################################## + +# Strip all of the formatting from a provided string, returning the stripped +# version. +sub strip_format { + my ($self, $text) = @_; + $text =~ s/(.)[\b]\1/$1/g; + $text =~ s/_[\b]//g; + return $text; +} + +############################################################################## +# Module return value and documentation +############################################################################## + +1; +__END__ + +=head1 NAME + +Pod::Text::Overstrike - Convert POD data to formatted overstrike text + +=head1 SYNOPSIS + + use Pod::Text::Overstrike; + my $parser = Pod::Text::Overstrike->new (sentence => 0, width => 78); + + # Read POD from STDIN and write to STDOUT. + $parser->parse_from_filehandle; + + # Read POD from file.pod and write to file.txt. + $parser->parse_from_file ('file.pod', 'file.txt'); + +=head1 DESCRIPTION + +Pod::Text::Overstrike is a simple subclass of Pod::Text that highlights +output text using overstrike sequences, in a manner similar to nroff. +Characters in bold text are overstruck (character, backspace, character) and +characters in underlined text are converted to overstruck underscores +(underscore, backspace, character). This format was originally designed for +hardcopy terminals and/or lineprinters, yet is readable on softcopy (CRT) +terminals. + +Overstruck text is best viewed by page-at-a-time programs that take +advantage of the terminal's B<stand-out> and I<underline> capabilities, such +as the less program on Unix. + +Apart from the overstrike, it in all ways functions like Pod::Text. See +L<Pod::Text> for details and available options. + +=head1 BUGS + +Currently, the outermost formatting instruction wins, so for example +underlined text inside a region of bold text is displayed as simply bold. +There may be some better approach possible. + +=head1 SEE ALSO + +L<Pod::Text>, L<Pod::Parser> + +The current version of this module is always available from its web site at +L<http://www.eyrie.org/~eagle/software/podlators/>. It is also part of the +Perl core distribution as of 5.6.0. + +=head1 AUTHOR + +Joe Smith <Joe.Smith@inwap.com>, using the framework created by Russ Allbery +<rra@stanford.edu>. + +=head1 COPYRIGHT AND LICENSE + +Copyright 2000 by Joe Smith <Joe.Smith@inwap.com>. +Copyright 2001 by Russ Allbery <rra@stanford.edu>. + +This program is free software; you may redistribute it and/or modify it +under the same terms as Perl itself. + +=cut |