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# -*- Mode: Perl -*- |
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# WAIT::Parse::Pod -- |
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# ITIID : $ITI$ $Header $__Header$ |
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# Author : Ulrich Pfeifer |
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# Created On : Sat Dec 14 17:38:29 1996 |
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# Last Modified By: Ulrich Pfeifer |
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# Last Modified On: Sun Nov 22 18:44:40 1998 |
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# Language : CPerl |
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# Update Count : 275 |
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# Status : Unknown, Use with caution! |
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# |
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# Copyright (c) 1996-1997, Ulrich Pfeifer |
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# |
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package WAIT::Parse::Pod; |
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use Pod::Parser; |
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use Carp; |
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use vars qw(@ISA %GOOD_HEADER); |
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|
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# Got tired reinstalling Pod::Parser after each perl rebuild. So I renamed |
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# Pod::Text to Pod::PText. Thus this hack: |
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BEGIN { |
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eval {require Pod::PText;}; |
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if ($@ ne '') { |
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require Pod::Text; |
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croak "Need Pod::Tex version > 2.0" if $Pod::Text::VERSION < 2.0; |
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@ISA = qw(Pod::Text Pod::Parser WAIT::Parse::Base); |
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} else { |
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@ISA = qw(Pod::PText Pod::Parser WAIT::Parse::Base); |
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} |
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} |
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use Text::Tabs qw(expand); |
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use strict; |
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|
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|
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|
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# recognized =head1 headers |
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%GOOD_HEADER = ( |
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name => 1, |
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synopsis => 1, |
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options => 1, |
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description => 1, |
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author => 1, |
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example => 1, |
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bugs => 1, |
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text => 1, |
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see => 1, |
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environment => 1, |
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); |
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|
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sub default_indent () {4}; |
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|
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# make frequent tag sets reusable |
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my $CODE = {text => 1, _c => 1}; |
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my $BOLD = {text => 1, _b => 1}; |
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my $ITALIC = {text => 1, _i => 1}; |
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my $PLAIN = {text => 1}; |
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|
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sub new { |
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my $this = shift; |
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my $class = ref($this) || $this; |
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my $self = $this->SUPER::new(@_); |
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bless $self, $class; |
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} |
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|
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sub begin_input { |
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my $self = shift; |
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|
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$self->indent(default_indent); |
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$self->{TAGS} = {}; |
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$self->{OUT} = []; |
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} |
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|
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sub indent { |
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my $self = shift; |
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|
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if (@_) { |
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$self->{INDENT} = shift; |
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} |
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$self->{INDENT}; |
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} |
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|
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# Stolen afrom Pod::Parser by Tom Christiansen and Brad Appleton and modified |
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sub interpolate { |
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my $self = shift; |
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my ($text, $end_re) = @_; |
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|
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$text = '' unless (defined $text); |
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$end_re = "\$" unless ((defined $end_re) && ($end_re ne '')); |
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local($_) = $text; |
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my @result; |
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|
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my ($seq_cmd, $seq_arg, $end) = ('', '', undef); |
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while (($_ ne '') && /([A-Z])<|($end_re)/) { |
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# Only text after the match remains to be processed |
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$_ = $'; |
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# Append text before the match to the result |
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push @result, $self->{TAGS}, $`; |
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# See if we matched an interior sequence or an end-expression |
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($seq_cmd, $end) = ($1, $2); |
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last if (defined $end); # Saw the end - quit loop here |
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# At this point we have found an interior sequence, |
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# we need to obtain its argument |
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if ($seq_cmd =~ /^([FBIC])/) { |
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my $tag = '_' . lc $1; |
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my $tags = $self->{TAGS}; |
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my %tags = (%{$tags}, $tag => 1); |
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$self->{TAGS} = \%tags; |
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push @result, $self->interpolate($_, '>'); |
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$self->{TAGS} = $tags; |
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} else { |
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my @seq_arg = $self->interpolate($_, '>'); |
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my $i; |
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|
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for ($i=1;$i<=@seq_arg;$i+=2) { |
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push @result, $seq_arg[$i-1], |
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$self->interior_sequence($seq_cmd, $seq_arg[$i]); |
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} |
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} |
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} |
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## Handle whatever is left if we didnt match the ending regexp |
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unless ((defined $end) && ($end_re ne "\$")) { |
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push @result, $self->{TAGS}, $_; |
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$_ = ''; |
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} |
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## Modify the input parameter to consume the text that was |
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## processed so far. |
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$_[0] = $_; |
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## Return the processed-text |
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return @result; |
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} |
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|
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sub textblock { |
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my ($self, $text) = @_; |
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|
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$self->output($self->interpolate($self->wrap($text)), $PLAIN, "\n\n"); |
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} |
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|
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sub output { |
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my ($self) = shift; |
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|
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while (@_) { |
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my $tags = shift; |
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my $text = shift; |
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croak "Bad tags parameter: '$tags'" unless ref($tags); |
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push @{$self->{OUT}}, $tags, $text; |
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} |
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} |
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|
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sub verbatim { |
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my ($self, $text) = @_; |
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my $indent = $self->indent() + default_indent; |
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|
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$text = expand($text); |
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my ($prefix) = ($text =~ /^(\s+)/); |
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|
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if (length($prefix) < $indent) { |
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my $add = ' ' x ($indent - length($prefix)); |
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$text =~ s/^/$add/gm; |
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} elsif (length($prefix) > $indent) { |
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my $sub = ' ' x (length($prefix) - $indent); |
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$text =~ s/^$sub//gm; |
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} |
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$self->output($CODE, $text); |
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} |
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|
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sub command { |
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my ($self, $cmd, $arg, $sep) = @_; |
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|
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if ($cmd =~ /^head(\d)/) { |
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my $indent = $1-1; |
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my $tags = $self->{TAGS}; |
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|
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$self->{TAGS} = $BOLD; |
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$self->output($self->interpolate($self->wrap($arg, |
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$indent*default_indent)."\n\n")); |
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if ($indent) { |
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$self->{TAGS} = $tags; |
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} else { |
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my $sarg = lc $arg; |
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$sarg =~ s/\s.*//g; |
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if ($GOOD_HEADER{$sarg}) { |
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$self->{TAGS} = {lc $sarg => 1} |
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} else { |
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$self->{TAGS} = {text => 1} |
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} |
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} |
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} elsif ($cmd =~ /^back/) { |
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$self->indent(default_indent); |
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} elsif ($cmd =~ /^over/) { |
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my $indent = (($arg)?$arg:default_indent) + default_indent; |
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$self->indent($indent); |
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} elsif ($cmd =~ /^item/) { |
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$self->output($self->interpolate($self->wrap($arg,default_indent)."\n\n")) |
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} else { |
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$self->output($self->{TAGS}, $arg); |
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} |
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} |
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|
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# inspired from Text::Wrap by David Muir Sharnoff |
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sub wrap { |
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my ($self, $t, $indent) = @_; |
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$indent = $self->indent unless defined $indent; |
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|
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my $columns = 76 - $indent; |
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my $ll = $columns; |
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my $prefix = ' ' x $indent; |
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my $result = $prefix; |
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my $length; |
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|
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# E/L will probably change length |
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$t =~ s/([EL])<(.*?)>/$self->interior_sequence($1,$2)/eg; |
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$t =~ s/\s+/ /g; |
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while ($t =~ s/^(\S+)\s?//o) { |
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my $word = $1; |
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|
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# inline length calculation for speed |
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my $dummy = $word; |
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$dummy =~ s/[A-Z]<(.*?)>/$1/og; |
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$length = length($dummy); |
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|
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if ($length < $ll) { |
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$result .= $word . ' '; |
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$ll -= $length + 1; |
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} else { |
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$result =~ s/ $/\n/; |
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$result .= $prefix . $word . ' '; |
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$ll = $columns - $length - 1; |
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} |
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} |
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return $result; |
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} |
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|
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|
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sub parse_from_string { |
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my $self = shift; |
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local($_); |
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|
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$self->{CUTTING} = 1; ## Keep track of when we are cutting |
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$self->begin_input(); |
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|
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my $paragraph = ''; |
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for (split /\n\s*\n/, $_[0]) { |
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$self->parse_paragraph($_ . "\n\n"); |
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} |
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|
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$self->end_input(); |
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} |
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|
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|
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sub tag { |
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my $self = shift; |
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|
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$self->begin_input; |
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$self->parse_from_string(@_); |
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my $result = $self->{OUT}; |
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delete $self->{OUT}; |
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delete $self->{TAGS}; |
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@{$result}; |
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} |
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