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package WRT::Markup; |
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use strict; |
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use warnings; |
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use feature "state"; |
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use base qw(Exporter); |
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our @EXPORT_OK = qw(line_parse image_markup eval_perl); |
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use File::Basename; |
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use Text::Textile; |
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use Text::Markdown::Discount; |
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use WRT::Image qw(image_size); |
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3619
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# Some useful defaults: |
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my %tags = ( |
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retcon => q{div class="retcon"}, |
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freeverse => 'p', |
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list => "ul>\n<li" |
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); |
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my %end_tags = ( |
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retcon => 'div', |
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freeverse => 'p', |
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list => "li>\n</ul" |
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); |
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my %blank_lines = ( |
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freeverse => "</p>\n\n<p>", |
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list => "</li>\n\n<li>" |
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); |
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my %newlines = ( |
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freeverse => "<br />\n" |
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); |
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my %dashes = ( |
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freeverse => ' — ' |
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); |
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43
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=item line_parse |
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45
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Performs substitutions on lines called by fragment_slurp, at least. Calls |
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image_markup(), textile_process(), markdown_process(). |
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48
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Returns string. |
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50
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Parses some special markup, specifically: |
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52
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<textile></textile> - Text::Textile to HTML |
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<markdown></markdown> - Text::Markdown::Discount to HTML |
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<freeverse></freeverse> |
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<retcon></retcon> |
56
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<list></list> |
57
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58
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<image>filename.ext |
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optional alt tag |
60
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optional title text</image> |
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62
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${variable} interpolation from the WRT object |
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<perl>print "hello world";</perl> |
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<include>path/to/file/from/project/root</include> |
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66
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=cut |
67
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68
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sub line_parse { |
69
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35
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35
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1
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my $self = shift; |
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35
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56
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my ($everything, $file) = (@_); |
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72
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# Take care of <include>, <textile>, <markdown>, and <image> tags: |
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35
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87
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include_process($self, $everything); |
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35
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76
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textile_process($everything); |
75
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35
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2190
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markdown_process($everything); |
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35
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224
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$everything =~ s!<image>(.*?)</image>!$self->image_markup($file, $1)!seg; |
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1
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8
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77
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78
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35
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119
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foreach my $key (keys %tags) { |
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# Set some replacements, unless they've been explicitly set already: |
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105
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33
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194
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$end_tags{$key} ||= $tags{$key}; |
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105
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100
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164
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$blank_lines{$key} ||= "\n\n"; |
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105
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100
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147
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$newlines{$key} ||= "\n"; |
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105
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100
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146
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$dashes{$key} ||= " -- "; |
84
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85
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# Transform blocks: |
86
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105
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1235
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while ($everything =~ m/(<$key>.*?<\/$key>)/s) { |
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2
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5
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my $block = $1; |
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89
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# Save the bits between instances of the block: |
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2
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20
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my (@interstices) = split /\Q$block\E/s, $everything; |
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92
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# Tags that surround the block: |
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2
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31
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$block =~ s{\n?<$key>\n?}{<$tags{$key}>}gs; |
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2
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24
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$block =~ s{\n?</$key>\n?}{</$end_tags{$key}>}gs; |
95
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96
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# Dashes, blank lines, and newlines: |
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2
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$block = dashes($dashes{$key}, $block); |
98
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2
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7
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$block =~ s/\n\n/$blank_lines{$key}/gs; |
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2
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4
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$block = newlines($newlines{$key}, $block); |
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101
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# ...and slap it all back together as $everything |
102
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2
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11
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$everything = join $block, @interstices; |
103
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} |
104
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} |
105
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106
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35
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233
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return $everything; |
107
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} |
108
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109
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=item eval_perl |
110
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111
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Evaluate embedded Perl in a string, replacing blocks enclosed with <perl> tags |
112
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with whatever they return (well, evaluated in a scalar context). Returns the |
113
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modified string. |
114
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115
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Also handles simple ${variables}, replacing them from the keys to $self. |
116
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117
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=cut |
118
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119
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sub eval_perl { |
120
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35
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35
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1
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51
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my $self = shift; |
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35
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53
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my ($text) = @_; |
122
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123
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35
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159
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while ($text =~ m{<perl>(.*?)</perl>}s) { |
124
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15
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38
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my $block = $1; |
125
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126
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# Run the $block, and include anything returned: |
127
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15
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895
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my $output = eval $block; |
128
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129
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15
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50
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62
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if ($@) { |
130
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# Errors - log and return an empty string: |
131
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0
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0
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print STDERR $@; |
132
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0
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0
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$output = ''; |
133
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} |
134
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135
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15
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181
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$text =~ s{<perl>\Q$block\E</perl>}{$output}s; |
136
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} |
137
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138
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# Interpolate variables: |
139
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35
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92
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$text =~ s{ |
140
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\$\{ ([a-zA-Z_]+) \} |
141
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}{ |
142
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126
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50
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217
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if (defined $self->{$1}) { |
143
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126
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354
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$self->{$1}; |
144
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} else { |
145
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# TODO: Possibly this should be fatal. |
146
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0
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0
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"UNDEFINED: $1"; |
147
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} |
148
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}gex; |
149
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150
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35
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132
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return $text; |
151
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} |
152
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153
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sub newlines { |
154
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2
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2
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0
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4
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my ($replacement, $block) = @_; |
155
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156
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# Single newlines (i.e., line ends) within the block, |
157
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# except those preceded by a double-quote, which probably |
158
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# indicates a still-open tag: |
159
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160
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2
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9
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$block =~ s/(?<=[^"\n]) # not a double-quote or newline |
161
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# don't capture |
162
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163
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\n # end-of-line |
164
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165
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(?=[^\n]) # not a newline |
166
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# don't capture |
167
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/$replacement/xgs; |
168
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169
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2
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5
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return $block; |
170
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171
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} |
172
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173
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# might need a rewrite. |
174
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sub dashes { |
175
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2
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2
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0
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5
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my ($replacement, $block) =@_; |
176
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177
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2
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3
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$block =~ s/(\s+) # whitespace - no capture |
178
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\-{2} # two dashes |
179
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(\n|\s+|$) # newline, whitespace, or eol |
180
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/$1${replacement}$2/xgs; |
181
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182
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2
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5
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return $block; |
183
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} |
184
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185
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=item include_process |
186
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187
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Inline replace <include>filename</include> tags, replacing them with the |
188
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contents of files. |
189
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190
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=cut |
191
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192
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sub include_process { |
193
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35
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35
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1
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37
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my $wrt = shift; |
194
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195
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35
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82
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$_[0] =~ s{ |
196
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197
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<include> # start tag |
198
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(.*?) # anything (non-greedy) |
199
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</include> # end tag |
200
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201
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}{ |
202
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3
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10
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retrieve_include($wrt, $1); |
203
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}xesg; |
204
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} |
205
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206
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=item retrieve_include |
207
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208
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Get the contents of an included file. This probably needs a great |
209
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deal more thought than I am presently giving it. |
210
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211
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=cut |
212
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213
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sub retrieve_include { |
214
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3
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3
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1
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6
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my $wrt = shift; |
215
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3
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9
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my ($file) = @_; |
216
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217
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# Trim leading and trailing spaces: |
218
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3
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7
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$file =~ s/^\s+//; |
219
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3
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7
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$file =~ s/\s+$//; |
220
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221
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3
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50
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11
|
if ($file =~ m{^ (/ | [.]/) }x) { |
222
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# TODO: Leads with a slash or a ./ |
223
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0
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0
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die('Tried to open an include path with a leading / or ./ - not yet supported.'); |
224
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} else { |
225
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# Use the archive root as path. |
226
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3
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11
|
$file = $wrt->root_dir . '/' . $file; |
227
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} |
228
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229
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3
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50
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34
|
unless (-e $file) { |
230
|
0
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0
|
warn "No such file: $file"; |
231
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0
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0
|
return ''; |
232
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} |
233
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234
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3
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50
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17
|
if (-d $file) { |
235
|
0
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0
|
die("Tried to open a directory as an include path: $file"); |
236
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|
} |
237
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238
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3
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50
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|
70
|
open my $fh, '<', $file |
239
|
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|
|
or warn "Couldn't open $file: $!\n"; |
240
|
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241
|
3
|
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|
|
5
|
my $file_contents; |
242
|
|
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|
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|
|
{ |
243
|
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|
|
# line separator: |
244
|
3
|
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|
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5
|
local $/ = undef; |
|
3
|
|
|
|
|
11
|
|
245
|
3
|
|
|
|
|
37
|
$file_contents = <$fh>; |
246
|
|
|
|
|
|
|
} |
247
|
|
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|
|
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|
|
248
|
3
|
50
|
|
|
|
18
|
close $fh or warn "Couldn't close $file: $!"; |
249
|
|
|
|
|
|
|
|
250
|
3
|
|
|
|
|
18
|
return $file_contents; |
251
|
|
|
|
|
|
|
} |
252
|
|
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253
|
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|
|
=item textile_process |
254
|
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|
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|
|
255
|
|
|
|
|
|
|
Inline replace <textile> markup in a string. |
256
|
|
|
|
|
|
|
|
257
|
|
|
|
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|
|
=cut |
258
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|
|
259
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|
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|
|
|
|
# This is exactly the kind of code that, even though it isn't doing anything |
260
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|
|
|
|
# especially insane, looks ghastly to people who don't read Perl, so I'll try |
261
|
|
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|
|
# to explain a bit. |
262
|
|
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|
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|
263
|
|
|
|
|
|
|
sub textile_process { |
264
|
|
|
|
|
|
|
|
265
|
|
|
|
|
|
|
# First, there's a state variable here which can retain the Text::Textile |
266
|
|
|
|
|
|
|
# object between invocations, saving us a bit of time on subsequent calls. |
267
|
|
|
|
|
|
|
# This should be equivalent to creating a closure around the function and |
268
|
|
|
|
|
|
|
# keeping a $textile variable there. |
269
|
35
|
|
|
35
|
1
|
33
|
state $textile; |
270
|
|
|
|
|
|
|
|
271
|
|
|
|
|
|
|
# Second, instead of unrolling the arguments to the function, we just act |
272
|
|
|
|
|
|
|
# directly on the first (0th) one. =~ more or less means "do a regexy |
273
|
|
|
|
|
|
|
# thing on this". It's followed by s, the substitution operator, which can |
274
|
|
|
|
|
|
|
# use curly braces as delimiters between pattern and replacement. |
275
|
|
|
|
|
|
|
|
276
|
35
|
|
|
|
|
76
|
$_[0] =~ s{ |
277
|
|
|
|
|
|
|
|
278
|
|
|
|
|
|
|
# find tags... |
279
|
|
|
|
|
|
|
|
280
|
|
|
|
|
|
|
<textile> # start tag |
281
|
|
|
|
|
|
|
(.*?) # anything (non-greedy) |
282
|
|
|
|
|
|
|
</textile> # end tag |
283
|
|
|
|
|
|
|
|
284
|
|
|
|
|
|
|
}{ |
285
|
|
|
|
|
|
|
|
286
|
|
|
|
|
|
|
# ...and replace them with the result of evaluating this block. |
287
|
|
|
|
|
|
|
|
288
|
|
|
|
|
|
|
# //= means "defined-or-equals"; if the var hasn't been defined yet, |
289
|
|
|
|
|
|
|
# then make a new Textile object: |
290
|
1
|
|
33
|
|
|
11
|
$textile //= Text::Textile->new(); |
291
|
|
|
|
|
|
|
|
292
|
|
|
|
|
|
|
# Process the stuff we slurped out of our tags - this value will be |
293
|
|
|
|
|
|
|
# used to replace the entire match from above (in Perl, the last |
294
|
|
|
|
|
|
|
# expression evaluated is the return value of subs, evals, etc.): |
295
|
1
|
|
|
|
|
188
|
$textile->process($1); |
296
|
|
|
|
|
|
|
|
297
|
|
|
|
|
|
|
}xesg; |
298
|
|
|
|
|
|
|
|
299
|
|
|
|
|
|
|
# x: eXtended regexp - whitespace ignored by default, comments allowed |
300
|
|
|
|
|
|
|
# e: Execute the replacement as Perl code, and use its value |
301
|
|
|
|
|
|
|
# s: treat all lines of the search subject as a Single string |
302
|
|
|
|
|
|
|
# g: Globally replace all matches |
303
|
|
|
|
|
|
|
|
304
|
|
|
|
|
|
|
# For the genuinely concise version of this, see markdown_process(). |
305
|
|
|
|
|
|
|
} |
306
|
|
|
|
|
|
|
|
307
|
|
|
|
|
|
|
=item markdown_process |
308
|
|
|
|
|
|
|
|
309
|
|
|
|
|
|
|
Inline replace <markdown> markup in a string. |
310
|
|
|
|
|
|
|
|
311
|
|
|
|
|
|
|
=cut |
312
|
|
|
|
|
|
|
|
313
|
|
|
|
|
|
|
sub markdown_process { |
314
|
35
|
|
|
35
|
1
|
36
|
state $markdown; |
315
|
|
|
|
|
|
|
|
316
|
35
|
|
|
|
|
41
|
my $flags = Text::Markdown::Discount::MKD_EXTRA_FOOTNOTE(); |
317
|
|
|
|
|
|
|
|
318
|
35
|
|
|
|
|
87
|
$_[0] =~ s{ |
319
|
|
|
|
|
|
|
<markdown>(.*?)</markdown> |
320
|
|
|
|
|
|
|
}{ |
321
|
5
|
|
66
|
|
|
37
|
$markdown //= Text::Markdown::Discount->new; |
322
|
5
|
|
|
|
|
45
|
$markdown->markdown($1, $flags); |
323
|
|
|
|
|
|
|
}xesg; |
324
|
|
|
|
|
|
|
} |
325
|
|
|
|
|
|
|
|
326
|
|
|
|
|
|
|
=item image_markup |
327
|
|
|
|
|
|
|
|
328
|
|
|
|
|
|
|
Parse out an image tag and return the appropriate html. |
329
|
|
|
|
|
|
|
|
330
|
|
|
|
|
|
|
Relies on image_size from WRT::Image. |
331
|
|
|
|
|
|
|
|
332
|
|
|
|
|
|
|
=cut |
333
|
|
|
|
|
|
|
|
334
|
|
|
|
|
|
|
sub image_markup { |
335
|
1
|
|
|
1
|
1
|
3
|
my $self = shift; |
336
|
1
|
|
|
|
|
6
|
my ($file, $block) = @_; |
337
|
|
|
|
|
|
|
|
338
|
|
|
|
|
|
|
# Get a basename and directory for the file referencing the image: |
339
|
1
|
|
|
|
|
18
|
my ($basename, $dir) = fileparse($file); |
340
|
|
|
|
|
|
|
|
341
|
|
|
|
|
|
|
# Truncated file date that just includes date + sub docs: |
342
|
1
|
|
|
|
|
4
|
my ($file_date) = $dir =~ m{ |
343
|
|
|
|
|
|
|
( |
344
|
|
|
|
|
|
|
[0-9]{4}/ # year |
345
|
|
|
|
|
|
|
[0-9]{1,2}/ # month |
346
|
|
|
|
|
|
|
[0-9]{1,2}/ # day |
347
|
|
|
|
|
|
|
([a-z]*/)* # sub-entries |
348
|
|
|
|
|
|
|
) |
349
|
|
|
|
|
|
|
$ |
350
|
|
|
|
|
|
|
}x; |
351
|
|
|
|
|
|
|
|
352
|
|
|
|
|
|
|
# Process the contents of the <image> tag: |
353
|
1
|
|
|
|
|
6
|
my ($image_url, $alt_text, $title_text) = split /\n/, $block; |
354
|
1
|
|
50
|
|
|
10
|
$alt_text ||= q{}; |
355
|
1
|
|
33
|
|
|
13
|
$title_text ||= $alt_text; |
356
|
|
|
|
|
|
|
|
357
|
|
|
|
|
|
|
# Resolve relative paths: |
358
|
1
|
|
|
|
|
3
|
my $image_file; |
359
|
1
|
50
|
|
|
|
30
|
if (-e "$dir/$image_url" ) { |
|
|
50
|
|
|
|
|
|
360
|
0
|
|
|
|
|
0
|
$image_file = "$dir/$image_url"; |
361
|
0
|
|
|
|
|
0
|
$image_url = "${file_date}${image_url}"; |
362
|
|
|
|
|
|
|
} elsif (-e $self->entry_dir . "/$image_url") { |
363
|
1
|
|
|
|
|
7
|
$image_file = $self->entry_dir . "/$image_url"; |
364
|
|
|
|
|
|
|
} |
365
|
|
|
|
|
|
|
|
366
|
|
|
|
|
|
|
# Get width & height in pixels for known filetypes: |
367
|
1
|
|
|
|
|
7
|
my ($width, $height) = image_size($image_file); |
368
|
|
|
|
|
|
|
|
369
|
|
|
|
|
|
|
# This probably relies on mod_rewrite working: |
370
|
1
|
|
|
|
|
2539
|
$image_url = $self->image_url_root . $image_url; |
371
|
1
|
|
|
|
|
17
|
return <<"IMG"; |
372
|
|
|
|
|
|
|
<img src="$image_url" |
373
|
|
|
|
|
|
|
width="$width" |
374
|
|
|
|
|
|
|
height="$height" |
375
|
|
|
|
|
|
|
alt="$alt_text" |
376
|
|
|
|
|
|
|
title="$title_text" /> |
377
|
|
|
|
|
|
|
IMG |
378
|
|
|
|
|
|
|
} |
379
|
|
|
|
|
|
|
|
380
|
|
|
|
|
|
|
# Encapsulate some ugly file-location functionality. |
381
|
|
|
|
|
|
|
sub resolve_file { |
382
|
0
|
|
|
0
|
0
|
|
my $self = shift; |
383
|
0
|
|
|
|
|
|
my ($filename) = @_; |
384
|
|
|
|
|
|
|
|
385
|
|
|
|
|
|
|
# Get a basename and directory for the file: |
386
|
0
|
|
|
|
|
|
my ($basename, $dir) = fileparse($filename); |
387
|
|
|
|
|
|
|
|
388
|
|
|
|
|
|
|
#if (-e "$dir/$image_url" ) { |
389
|
|
|
|
|
|
|
#$image_file = "$dir/$image_url"; |
390
|
|
|
|
|
|
|
#$image_url = "${file_date}${image_url}"; |
391
|
|
|
|
|
|
|
#} elsif (-e $self->entry_dir . "/$image_url") { |
392
|
|
|
|
|
|
|
#$image_file = $self->entry_dir . "/$image_url"; |
393
|
|
|
|
|
|
|
#} |
394
|
|
|
|
|
|
|
|
395
|
|
|
|
|
|
|
} |
396
|
|
|
|
|
|
|
|
397
|
|
|
|
|
|
|
1; |