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#--------------------------------------------------------------------- |
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package Pod::Loom::Parser; |
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# |
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# Copyright 2009 Christopher J. Madsen |
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# |
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# Author: Christopher J. Madsen <perl@cjmweb.net> |
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# Created: 6 Oct 2009 |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the same terms as Perl itself. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See either the |
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# GNU General Public License or the Artistic License for more details. |
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# |
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# ABSTRACT: Subclass Pod::Eventual for Pod::Loom |
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#--------------------------------------------------------------------- |
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use 5.008; |
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our $VERSION = '0.05'; |
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# This file is part of Pod-Loom 0.08 (March 23, 2014) |
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use strict; |
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use warnings; |
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use Encode qw(find_encoding); |
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use Pod::Eventual (); |
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our @ISA = qw(Pod::Eventual); |
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#--------------------------------------------------------------------- |
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sub new |
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{ |
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my ($class, $collectCommands) = @_; |
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my %collect = map { $_ => [] } @$collectCommands; |
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my %groups = map { $_ => {} } @$collectCommands; |
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bless { |
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collect => \%collect, |
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dest => undef, |
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groups => \%groups, |
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}, $class; |
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} # end new |
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#--------------------------------------------------------------------- |
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sub _handle_encoding |
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{ |
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my ($self, $event) = @_; |
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my $encoding = $event->{content}; |
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$encoding =~ s/^\s+//; |
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$encoding =~ s/\s+\z//; |
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my $e = find_encoding($encoding) |
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or die "Invalid =encoding $encoding at line $event->{start_line}\n"; |
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if (defined $self->{encoding}) { |
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return if $e->name eq $self->{encoding}->name; |
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die "Conflicting =encoding directive at line $event->{start_line}\n"; |
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} |
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$self->{encoding} = $e; |
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} # end _handle_encoding |
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#--------------------------------------------------------------------- |
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sub handle_event |
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{ |
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my ($self, $event) = @_; |
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my $dest = $self->{dest}; |
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if ($event->{type} eq 'command') { |
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my $cmd = $event->{command}; |
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return if $cmd eq 'cut'; |
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return $self->_handle_encoding($event) if $cmd eq 'encoding'; |
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# See if this changes the output location: |
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my $collector = $self->{collect}{ $cmd }; |
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if (not $collector and $cmd =~ /^(\w+)-(\S+)/ and $self->{collect}{$1}) { |
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$collector = $self->{collect}{$cmd} = []; |
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$self->{groups}{$1}{$2} = 1; |
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} # end if new group |
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# Special handling for Pod::Loom sections: |
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if ($cmd =~ /^(begin|for)$/ and |
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$event->{content} =~ s/^\s*(Pod::Loom\b\S*)\s*//) { |
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$collector = ($self->{collect}{$1} ||= []); |
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if ($cmd eq 'for') { |
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push @$collector, $event->{content}; |
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return; |
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} |
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undef $cmd; |
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} elsif ($cmd eq 'end' and |
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$event->{content} =~ /^\s*Pod::Loom\b/) { |
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# Handle =end Pod::Loom: |
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$self->{dest} = undef; |
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return; |
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} |
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105
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# Either set output location, or make sure we have one: |
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50
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11
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if ($collector) { |
107
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13
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push @$collector, ''; |
108
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7
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14
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$dest = $self->{dest} = \$collector->[-1]; |
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} else { |
110
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die "=$cmd used too soon at line $event->{start_line}\n" unless $dest; |
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} |
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14
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if ($cmd) { |
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13
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$$dest .= "=$cmd"; |
115
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22
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$$dest .= ' ' unless $event->{content} =~ /^\n/; |
116
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} |
117
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} # end if command event |
118
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119
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30
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60
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$$dest .= $event->{content}; |
120
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} # end handle_event |
121
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122
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#--------------------------------------------------------------------- |
123
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sub handle_blank |
124
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{ |
125
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16
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16
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1
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1114
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my ($self, $event) = @_; |
126
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127
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16
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100
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39
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if ($self->{dest}) { |
128
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14
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17
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$event->{type} = 'text'; |
129
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14
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24
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$self->handle_event($event); |
130
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} |
131
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} # end handle_blank |
132
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#--------------------------------------------------------------------- |
133
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134
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135
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sub collected |
136
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{ |
137
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13
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13
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1
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18
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my ($self) = @_; |
138
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139
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13
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27
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my $collected = $self->{collect}; |
140
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13
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66
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51
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my $encoding = $self->{encoding} ||= find_encoding('iso-8859-1'); |
141
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142
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13
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50
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131
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unless ($self->{collect_decoded}++) { |
143
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13
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36
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for my $array (values %$collected) { |
144
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77
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96
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for my $value (@$array) { |
145
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19
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94
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$value = $encoding->decode($value); |
146
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} |
147
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} |
148
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} |
149
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150
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13
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390
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$collected; |
151
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} # end collected |
152
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153
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#--------------------------------------------------------------------- |
154
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155
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156
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13
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33
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13
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1
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365
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sub encoding { shift->{encoding} ||= find_encoding('iso-8859-1') } |
157
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#--------------------------------------------------------------------- |
158
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159
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160
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13
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13
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1
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334
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sub groups { shift->{groups} } |
161
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162
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#===================================================================== |
163
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# Package Return Value: |
164
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165
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1; |
166
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167
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__END__ |
168
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169
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=head1 NAME |
170
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171
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Pod::Loom::Parser - Subclass Pod::Eventual for Pod::Loom |
172
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173
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|
=head1 VERSION |
174
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175
|
|
|
|
|
|
|
This document describes version 0.05 of |
176
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|
|
|
|
Pod::Loom::Parser, released March 23, 2014 |
177
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|
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|
|
as part of Pod-Loom version 0.08. |
178
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179
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=head1 SYNOPSIS |
180
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181
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|
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use Pod::Loom::Parser; |
182
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183
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|
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|
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my $parser = Pod::Loom::Parser->new( ['head1'] ); |
184
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|
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|
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|
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$parser->read_file('lib/Foo/Bar.pm'); |
185
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my $collectedHash = $parser->collected; |
186
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187
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|
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foreach my $block (@{ $collectedHash->{head1} }) { |
188
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|
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printf "---\n%s\n", $block; |
189
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} |
190
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191
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|
|
=head1 DESCRIPTION |
192
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193
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|
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|
|
Pod::Loom::Parser is a subclass of L<Pod::Eventual> intended for use |
194
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|
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by L<Pod::Loom::Template>. It breaks the POD into chunks based on a |
195
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list of POD commands. Each chunk begins with one of the commands, and |
196
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contains all the POD up until the next selected command. |
197
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198
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The commands do not need to be valid POD commands. You can invent |
199
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commands like C<=attr> or C<=method>. |
200
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201
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=head1 METHODS |
202
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|
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|
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203
|
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|
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See L<Pod::Eventual> for the C<read_handle>, C<read_file>, and |
204
|
|
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|
|
|
|
C<read_string> methods, which you use to feed POD into the parser. |
205
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206
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=head2 new |
207
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208
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|
|
$parser = Pod::Loom::Parser->new(\@collect_commands); |
209
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210
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|
|
Constructs a new Pod::Loom::Parser. You pass it an arrayref of the |
211
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POD commands at which the POD should be chopped. |
212
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213
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214
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=head2 collected |
215
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216
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|
|
$hashRef = $parser->collected; |
217
|
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This returns the POD chunks that the document was chopped into. There |
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is one entry for each of the C<@collect_commands> that were passed to |
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the constructor. The value is an arrayref of strings, one for each |
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time that command appeared in the document. Each chunk contains all |
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the text from the command up to (but not including) the command that |
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started the next chunk. Chunks appear in document order. |
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If one of the commands did not appear in the document, its value will |
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be an empty arrayref. |
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In addition, any POD targeted to a format matching C</^Pod::Loom\b/> |
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will be collected under the format name. |
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=head2 encoding |
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$encoding = $parser->encoding; |
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This returns the encoding that was used for the document as an |
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L<Encode> object. If no encoding was explicitly defined, then the |
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default Latin-1 encoding is returned. |
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=head2 groups |
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$hashRef = $parser->groups; |
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This returns a hashref with one entry for each of the |
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C<@collect_commands>. Each value is a hashref whose keys are the |
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categories used with that command. For example, if C<attr> was a |
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collected command, and the document contained these entries: |
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=attr-foo attr1 |
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=attr-bar attr2 |
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=attr-foo attr3 |
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=attr attr4 |
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then C<< keys %{ $parser->groups->{attr} } >> would return C<bar> and |
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C<foo>. (The C<=attr> without a category does not get an entry in |
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this hash.) |
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=head1 CONFIGURATION AND ENVIRONMENT |
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Pod::Loom::Parser requires no configuration files or environment variables. |
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=head1 DEPENDENCIES |
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Pod::Loom::Parser requires L<Pod::Eventual>, which can be found on CPAN. |
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=head1 INCOMPATIBILITIES |
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None reported. |
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=head1 BUGS AND LIMITATIONS |
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No bugs have been reported. |
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=head1 AUTHOR |
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Christopher J. Madsen S<C<< <perl AT cjmweb.net> >>> |
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Please report any bugs or feature requests |
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to S<C<< <bug-Pod-Loom AT rt.cpan.org> >>> |
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or through the web interface at |
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L<< http://rt.cpan.org/Public/Bug/Report.html?Queue=Pod-Loom >>. |
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You can follow or contribute to Pod-Loom's development at |
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L<< https://github.com/madsen/pod-loom >>. |
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=head1 COPYRIGHT AND LICENSE |
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This software is copyright (c) 2014 by Christopher J. Madsen. |
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This is free software; you can redistribute it and/or modify it under |
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the same terms as the Perl 5 programming language system itself. |
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=head1 DISCLAIMER OF WARRANTY |
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BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY |
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FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN |
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OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES |
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PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER |
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EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE |
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ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH |
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YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL |
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NECESSARY SERVICING, REPAIR, OR CORRECTION. |
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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
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WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR |
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REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENSE, BE |
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LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, |
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OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE |
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THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING |
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RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A |
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FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF |
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SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF |
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SUCH DAMAGES. |
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=cut |