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# You may distribute under the terms of either the GNU General Public License |
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# or the Artistic License (the same terms as Perl itself) |
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# |
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# (C) Paul Evans, 2011-2012 -- leonerd@leonerd.org.uk |
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package Parse::Man; |
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185621
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use strict; |
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use warnings; |
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use base qw( Parser::MGC ); |
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our $VERSION = '0.02'; |
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use constant pattern_ws => qr/[ \t]+/; |
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=head1 NAME |
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C - parse nroff-formatted manpages |
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=head1 DESCRIPTION |
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This abstract subclass of L recognises F grammar from a |
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file or string value. It invokes methods when various F directives are |
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encountered. It is intended that this class be used as a base class, with |
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methods provided to handle the various directives and formatting options. |
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Typically a subclass will store intermediate results in a data structure, |
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building it as directed by these method invocations. |
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=cut |
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sub parse |
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{ |
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16943
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my $self = shift; |
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$self->_change_para_options( |
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mode => "P", |
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filling => 1, |
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indent => 0, |
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); |
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$self->{para_flushed} = 0; |
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$self->sequence_of( \&parse_line ); |
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} |
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sub token_nl |
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{ |
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my $self = shift; |
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$self->expect( "\n" ); |
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} |
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sub token_chunk |
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{ |
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my $self = shift; |
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56
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return $self->any_of( |
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sub { ( $self->expect( qr/"((?:\\.|[^"\\\n]+)*)(?:"|$)/m ) )[1] }, |
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5142
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sub { $self->expect( qr/\S+/ ) }, |
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); |
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} |
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sub parse_chunks |
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{ |
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my $self = shift; |
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@{ $self->sequence_of( \&token_chunk ) }; |
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} |
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sub parse_chunks_flat |
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{ |
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my $self = shift; |
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return join " ", $self->parse_chunks; |
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} |
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sub parse_line |
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{ |
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0
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6767
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my $self = shift; |
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81
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356
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$self->commit; |
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$self->any_of( |
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sub { |
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1219
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my $directive = ( $self->expect( qr/\.([A-Z]+)/i ) )[1]; |
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4277
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$self->commit; |
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$self->${\"parse_directive_$directive"}( $self ); |
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1247
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$self->token_nl; |
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}, |
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sub { |
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# comments |
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4320
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$self->expect( qr/\.\\".*?\n/ ); |
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}, |
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sub { |
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2584
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$self->commit; |
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$self->scope_of( undef, sub { $self->parse_plaintext }, "\n" ); |
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}, |
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1193
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); |
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} |
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98
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=head1 TEXT CHUNK FORMATTING METHOD |
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100
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The following method is used to handle formatted text. Each call is passed a |
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plain string value from the input content. |
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103
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=cut |
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105
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=head2 $parser->chunk( $text, %opts ) |
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107
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The C<%opts> hash contains the following options: |
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109
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=over 4 |
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=item font => STRING |
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The name of the current font (C, C, etc..) |
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=item size => INT |
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The current text size, relative to a paragraph base of 0. |
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=back |
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=cut |
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sub parse_directive_B |
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{ |
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my $self = shift; |
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$self->_flush_para; |
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$self->chunk( $self->parse_chunks_flat, font => "B", size => 0 ); |
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} |
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sub parse_directive_I |
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{ |
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my $self = shift; |
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2
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$self->_flush_para; |
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$self->chunk( $self->parse_chunks_flat, font => "I", size => 0 ); |
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} |
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sub parse_directive_R |
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{ |
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my $self = shift; |
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2
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$self->_flush_para; |
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$self->chunk( $self->parse_chunks_flat, font => "R", size => 0 ); |
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} |
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144
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sub parse_directive_SM |
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{ |
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my $self = shift; |
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1
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$self->_flush_para; |
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1
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$self->chunk( $self->parse_chunks_flat, font => "R", size => -1 ); |
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} |
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151
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sub _parse_directive_alternate |
152
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{ |
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my $self = shift; |
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my ( $first, $second ) = @_; |
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$self->_flush_para; |
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my $i = 0; |
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100
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map { $self->chunk( $_, font => ( ++$i % 2 ? $first : $second ), size => 0 ) } $self->parse_chunks; |
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} |
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160
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sub parse_directive_BI |
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{ |
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0
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my $self = shift; |
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0
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0
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$self->_parse_directive_alternate( "B", "I" ); |
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} |
165
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166
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sub parse_directive_IB |
167
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{ |
168
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my $self = shift; |
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0
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$self->_parse_directive_alternate( "I", "B" ); |
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} |
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172
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sub parse_directive_RB |
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{ |
174
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my $self = shift; |
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22
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$self->_parse_directive_alternate( "R", "B" ); |
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} |
177
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178
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sub parse_directive_BR |
179
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{ |
180
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0
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0
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0
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my $self = shift; |
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0
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$self->_parse_directive_alternate( "B", "R" ); |
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} |
183
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184
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sub parse_directive_RI |
185
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{ |
186
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0
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0
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0
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my $self = shift; |
187
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0
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$self->_parse_directive_alternate( "R", "I" ); |
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} |
189
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190
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sub parse_directive_IR |
191
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{ |
192
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0
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0
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0
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my $self = shift; |
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0
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0
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$self->_parse_directive_alternate( "I", "R" ); |
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} |
195
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196
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=pod |
197
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198
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Other font requests that are found in C<\fX> or C<\f(AB> requests are handled |
199
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by similarly-named methods. |
200
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201
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=cut |
202
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203
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=head1 PARAGRAPH HANDLING METHODS |
204
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205
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The following methods are used to form paragraphs out of formatted text |
206
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chunks. Their return values are ignored. |
207
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208
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=cut |
209
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210
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=head2 $parser->para_TH( $name, $section ) |
211
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212
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Handles the C<.TH> paragraph which gives the page title and section number. |
213
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214
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=cut |
215
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216
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sub parse_directive_TH |
217
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{ |
218
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3
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3
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0
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7
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my $self = shift; |
219
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3
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23
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$self->_change_para( "P" ), |
220
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$self->para_TH( $self->parse_chunks ); |
221
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} |
222
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223
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=head2 $parser->para_SH( $title ) |
224
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225
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Handles the C<.SH> paragraph, which gives a section header. |
226
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227
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=cut |
228
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229
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sub parse_directive_SH |
230
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{ |
231
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4
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4
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0
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8
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my $self = shift; |
232
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4
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11
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$self->_change_para( "P" ), |
233
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$self->para_SH( $self->parse_chunks_flat ); |
234
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} |
235
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236
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=head2 $parser->para_SS( $title ) |
237
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238
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Handles the C<.SS> paragraph, which gives a sub-section header. |
239
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240
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=cut |
241
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242
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sub parse_directive_SS |
243
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{ |
244
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0
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0
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0
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0
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my $self = shift; |
245
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0
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0
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$self->_change_para( "P" ), |
246
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$self->para_SS( $self->parse_chunks_flat ); |
247
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} |
248
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249
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=head2 $parser->para_TP( $opts ) |
250
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251
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Handles a C<.TP> paragraph, which gives a term definition. |
252
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253
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=cut |
254
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255
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sub parse_directive_TP |
256
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{ |
257
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4
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4
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0
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9
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my $self = shift; |
258
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4
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14
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$self->_change_para( "TP" ); |
259
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} |
260
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261
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=head2 $parser->para_IP( $opts ) |
262
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263
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Handles a C<.IP> paragraph, which is indented like the definition part of a |
264
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C<.TP> paragraph. |
265
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266
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=cut |
267
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268
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sub parse_directive_IP |
269
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{ |
270
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1
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1
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0
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3
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my $self = shift; |
271
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1
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4
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$self->_change_para( "IP" ); |
272
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} |
273
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274
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=head2 $parser->para_P( $opts ) |
275
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276
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Handles the C<.P>, C<.PP> or C<.LP> paragraphs, which are all synonyms for a |
277
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plain paragraph content. |
278
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279
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=cut |
280
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281
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sub parse_directive_P |
282
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{ |
283
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10
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10
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0
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11
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my $self = shift; |
284
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10
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31
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$self->_change_para( "P" ); |
285
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} |
286
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287
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{ |
288
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12
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12
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125
|
no warnings 'once'; |
|
12
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24
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12
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13031
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289
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*parse_directive_PP = *parse_directive_LP = \&parse_directive_P; |
290
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} |
291
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292
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sub parse_directive_RS |
293
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{ |
294
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0
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0
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0
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0
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my $self = shift; |
295
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0
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0
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$self->_change_para_options( indent => "4n" ); |
296
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} |
297
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298
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sub parse_directive_RE |
299
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{ |
300
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0
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0
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0
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0
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my $self = shift; |
301
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0
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0
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$self->_change_para_options( indent => "0" ); |
302
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} |
303
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304
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sub parse_directive_br |
305
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{ |
306
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0
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0
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0
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0
|
my $self = shift; |
307
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0
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0
|
$self->entity_br; |
308
|
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} |
309
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310
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sub parse_directive_fi |
311
|
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{ |
312
|
2
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2
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0
|
4
|
my $self = shift; |
313
|
2
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|
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8
|
$self->_change_para_options( filling => 1 ); |
314
|
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|
} |
315
|
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316
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|
sub parse_directive_in |
317
|
|
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|
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|
|
{ |
318
|
0
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0
|
0
|
0
|
my $self = shift; |
319
|
|
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320
|
0
|
|
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0
|
my @ret; |
321
|
0
|
|
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|
|
0
|
my $indent = 0; |
322
|
|
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323
|
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|
|
$self->maybe( sub { |
324
|
0
|
|
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0
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|
0
|
$indent = $self->expect( qr/[+-]?\d+[n]?/ ); |
325
|
0
|
|
|
|
|
0
|
} ); |
326
|
|
|
|
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|
|
|
327
|
0
|
|
|
|
|
0
|
$self->_change_para_options( indent => $indent ); |
328
|
|
|
|
|
|
|
} |
329
|
|
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|
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|
|
330
|
|
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|
|
sub parse_directive_nf |
331
|
|
|
|
|
|
|
{ |
332
|
5
|
|
|
5
|
0
|
8
|
my $self = shift; |
333
|
5
|
|
|
|
|
11
|
$self->_change_para_options( filling => 0 ); |
334
|
|
|
|
|
|
|
} |
335
|
|
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|
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336
|
|
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|
|
sub parse_directive_sp |
337
|
|
|
|
|
|
|
{ |
338
|
0
|
|
|
0
|
0
|
0
|
my $self = shift; |
339
|
0
|
|
|
|
|
0
|
$self->entity_sp; |
340
|
|
|
|
|
|
|
} |
341
|
|
|
|
|
|
|
|
342
|
|
|
|
|
|
|
sub parse_plaintext |
343
|
|
|
|
|
|
|
{ |
344
|
39
|
|
|
39
|
0
|
60
|
my $self = shift; |
345
|
|
|
|
|
|
|
|
346
|
39
|
|
|
|
|
87
|
my @font = "R"; |
347
|
|
|
|
|
|
|
|
348
|
39
|
|
|
|
|
127
|
$self->_flush_para; |
349
|
|
|
|
|
|
|
|
350
|
|
|
|
|
|
|
$self->sequence_of( |
351
|
|
|
|
|
|
|
sub { $self->any_of( |
352
|
52
|
|
|
|
|
671
|
sub { $self->expect( qr/\\fP/ ); pop @font }, |
|
2
|
|
|
|
|
64
|
|
353
|
50
|
|
|
|
|
3216
|
sub { push @font, ( $self->expect( qr/\\f([A-Z])/ ) )[1]; }, # \fX |
354
|
42
|
|
|
|
|
3002
|
sub { push @font, ( $self->expect( qr/\\f\((..)/ ) )[1]; }, # \f(AB |
355
|
41
|
|
|
|
|
2727
|
sub { my $else = ( $self->expect( qr/\\(.)/ ) )[1]; $self->chunk( $else, font => $font[-1], size => 0 ) }, |
|
0
|
|
|
|
|
0
|
|
356
|
41
|
|
|
|
|
2625
|
sub { $self->chunk( $self->substring_before( qr/[\\\n]/ ), font => $font[-1], size => 0 ) }, |
357
|
52
|
|
|
52
|
|
2811
|
); } |
358
|
39
|
|
|
|
|
268
|
); |
359
|
|
|
|
|
|
|
} |
360
|
|
|
|
|
|
|
|
361
|
|
|
|
|
|
|
sub _change_para |
362
|
|
|
|
|
|
|
{ |
363
|
22
|
|
|
22
|
|
33
|
my $self = shift; |
364
|
22
|
|
|
|
|
33
|
my ( $mode ) = @_; |
365
|
22
|
|
|
|
|
49
|
$self->_change_para_options( mode => $mode ); |
366
|
22
|
|
|
|
|
127
|
$self->{para_flushed} = 0; |
367
|
|
|
|
|
|
|
} |
368
|
|
|
|
|
|
|
|
369
|
|
|
|
|
|
|
sub _change_para_options |
370
|
|
|
|
|
|
|
{ |
371
|
68
|
|
|
68
|
|
98
|
my $self = shift; |
372
|
68
|
|
|
|
|
238
|
my %opts = @_; |
373
|
|
|
|
|
|
|
|
374
|
68
|
100
|
100
|
|
|
169
|
if( grep { ($self->{para_options}{$_}//"") ne $opts{$_} } keys %opts ) { |
|
146
|
|
|
|
|
3147
|
|
375
|
26
|
|
|
|
|
59
|
$self->{para_flushed} = 0; |
376
|
|
|
|
|
|
|
} |
377
|
|
|
|
|
|
|
|
378
|
68
|
|
|
|
|
534
|
$self->{para_options}{$_} = $opts{$_} for keys %opts; |
379
|
|
|
|
|
|
|
} |
380
|
|
|
|
|
|
|
|
381
|
|
|
|
|
|
|
sub _flush_para |
382
|
|
|
|
|
|
|
{ |
383
|
52
|
|
|
52
|
|
75
|
my $self = shift; |
384
|
52
|
100
|
|
|
|
139
|
if( !$self->{para_flushed} ) { |
385
|
41
|
|
|
|
|
81
|
my $mode = $self->{para_options}{mode}; |
386
|
41
|
|
|
|
|
65
|
$self->${\"para_$mode"}( $self->{para_options} ); |
|
41
|
|
|
|
|
205
|
|
387
|
41
|
|
|
|
|
208
|
$self->{para_flushed}++; |
388
|
|
|
|
|
|
|
} |
389
|
|
|
|
|
|
|
else { |
390
|
11
|
|
|
|
|
41
|
$self->join_para; |
391
|
|
|
|
|
|
|
} |
392
|
|
|
|
|
|
|
} |
393
|
|
|
|
|
|
|
|
394
|
|
|
|
|
|
|
=head1 AUTHOR |
395
|
|
|
|
|
|
|
|
396
|
|
|
|
|
|
|
Paul Evans |
397
|
|
|
|
|
|
|
|
398
|
|
|
|
|
|
|
=cut |
399
|
|
|
|
|
|
|
|
400
|
|
|
|
|
|
|
0x55AA; |