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package Pod::PseudoPod::Book::Command::buildepub; |
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# ABSTRACT: command module for C<ppbook buildepub> |
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2488
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use strict; |
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use warnings; |
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use parent 'Pod::PseudoPod::Book::Command'; |
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use autodie; |
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use EBook::EPUB; |
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2371550
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use File::Slurp; |
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use File::Basename; |
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use HTML::Entities; |
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use File::Spec::Functions qw( catfile catdir splitpath ); |
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sub execute |
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{ |
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my ($self, $opt, $args) = @_; |
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my $conf = $self->config; |
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my @chapters = $self->get_built_html( 'xhtml' ); |
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my $toc = $self->get_toc( @chapters ); |
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generate_ebook( $conf, $toc, @chapters ); |
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} |
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sub get_toc |
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{ |
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my $self = shift; |
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my @toc; |
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for my $chapter (@_) |
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{ |
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my $contents = File::Slurp::read_file( $chapter ); |
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while ($contents =~ /<h(\d) id="([^"]+)">(.+)<\/h\1>/g) |
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{ |
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my ($level, $identifier, $label) = ($1, $2, $3); |
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$label =~ s/<[^>]+>//g; |
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$label =~ s/&/&/g; |
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$identifier = '' if $level == 1; |
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push @toc, |
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[ $level, $identifier, decode_entities($label), $chapter ]; |
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} |
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} |
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return \@toc; |
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} |
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############################################################################## |
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# |
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# generate_ebook() |
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# |
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# Assemble the XHTML pages into an ePub eBook. |
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# |
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sub generate_ebook |
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{ |
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my ($conf, $table_of_contents, @chapters) = @_; |
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59
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# Create EPUB object |
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my $epub = EBook::EPUB->new; |
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my $metadata = $conf->{book}; |
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# Set the ePub metadata. |
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$epub->add_title( $metadata->{title} ); |
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$epub->add_author( $metadata->{author_name} ); |
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$epub->add_language( $metadata->{language} ); |
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$epub->add_publisher( $metadata->{publisher} ) if $metadata->{publisher}; |
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$epub->add_identifier( $metadata->{ISBN13}, 'ISBN' ) |
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if $metadata->{ISBN13}; |
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# Add the book cover. |
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my $cover = $conf->{book}{cover_image}; |
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add_cover($conf, $epub, $cover) if -e $cover; |
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76
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# Add some other metadata to the OPF file. |
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$epub->add_meta_item('EBook::EPUB version', $EBook::EPUB::VERSION); |
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79
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# Add package content: stylesheet, font, html |
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$epub->copy_stylesheet('./build/html/style.css', 'css/style.css'); |
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my $chapter_ids = add_chapters( $epub, @chapters ); |
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add_images( $epub ); |
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85
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# Add Pod headings to table of contents. |
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set_table_of_contents( $epub, $table_of_contents, $chapter_ids ); |
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write_toc( $epub, $table_of_contents, $chapter_ids ); |
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(my $filename_title = lc $conf->{book}{title} . '.epub') =~ s/\s+/_/g; |
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# Generate the ePub eBook. |
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my $filename = catfile( qw( build epub ), $filename_title ); |
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$epub->pack_zip($filename); |
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} |
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95
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sub add_images |
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{ |
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my $epub = shift; |
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my %mime_types = |
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( |
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jpg => 'image/jpeg', |
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gif => 'image/gif', |
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png => 'image/png', |
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); |
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105
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for my $image (glob( './build/images/*' )) |
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{ |
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my ($name, $path, $suffix) = fileparse( $image, qw( jpg gif png ) ); |
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my $mime_type = $mime_types{$suffix}; |
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my $dest = "text/images/$name$suffix"; |
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111
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die "Unknown image '$image'" unless $mime_type; |
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$epub->add_image_entry( $dest, $mime_type ); |
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$epub->copy_file( $image, $dest, $mime_type ); |
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} |
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} |
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117
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sub add_chapters |
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{ |
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my $epub = shift; |
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my %ids; |
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122
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for my $chapter (@_) |
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{ |
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my $file = (splitpath $chapter )[-1]; |
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(my $dest = 'text/' . $file) =~ s/\.html/\.xhtml/; |
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$ids{ $dest } = $epub->copy_xhtml( $chapter, $dest ); |
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} |
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130
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return \%ids; |
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} |
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133
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134
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############################################################################## |
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# |
136
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# set_table_of_contents() |
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# |
138
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# Add the Pod headings to the NCX <navMap> table of contents. |
139
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# |
140
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sub set_table_of_contents |
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{ |
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my ($epub, $pod_headings, $ids) = @_; |
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my $play_order = 1; |
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my @navpoints = ($epub) x 5; |
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my @navpoint_obj; |
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my %labels; |
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148
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for my $heading (@$pod_headings) |
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{ |
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my $heading_level = $heading->[0]; |
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my $section = $heading->[1]; |
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my $label = $heading->[2]; |
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(my $filename = $heading->[3]) =~ s!.*/([^/]+.xhtml)$!$1!; |
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my $content = 'text/' . $filename; |
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my $count = ++$labels{$label}; |
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$label .= " ($count)" if $count > 1; |
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158
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# Add the pod section to the NCX data, Except for root headings. |
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$content .= '#' . $section if $section && $section ne 'heading_id_2'; |
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my $id = $ids->{$content} || 'navPoint-' . $play_order; |
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162
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my %options = ( |
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content => $content, |
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id => $id, |
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play_order => $play_order, |
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label => $label, |
167
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); |
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169
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$play_order++; |
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171
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# Add the navpoints at the correct nested level. |
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my $navpoint_obj = $navpoints[$heading_level - 1]; |
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174
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$navpoint_obj = $navpoint_obj->add_navpoint(%options); |
175
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176
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# The returned navpoint object is used for the next nested level. |
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$navpoints[$heading_level] = $navpoint_obj; |
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179
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# This is a workaround for non-contiguous heading levels. |
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$navpoints[$heading_level + 1] = $navpoint_obj; |
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} |
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} |
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184
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############################################################################## |
185
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# |
186
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# write_toc() |
187
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# |
188
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# Writes the toc index.html file |
189
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# |
190
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sub write_toc |
191
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{ |
192
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0
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0
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0
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my ($epub, $pod_headings, $ids) = @_; |
193
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0
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my $play_order = 1; |
194
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my %labels; |
195
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my $html; |
196
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197
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for my $heading (@$pod_headings) |
198
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{ |
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my $heading_level = $heading->[0]; |
200
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my $section = $heading->[1]; |
201
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my $label = $heading->[2]; |
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(my $filename = $heading->[3]) =~ s!.*/([^/]+.xhtml)$!$1!; |
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my $content = 'text/' . $filename; |
204
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my $count = ++$labels{$label}; |
205
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$label .= " ($count)" if $count > 1; |
206
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207
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# Add the pod section to the NCX data, Except for root headings. |
208
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0
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$content .= '#' . $section if $section && $section ne 'heading_id_2'; |
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my $id = $ids->{$content} || 'navPoint-' . $play_order; |
210
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my $indent = ' ' x ( $heading_level - 1 ); |
211
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212
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$html .= $indent . qq|<a href="$id">$label</a><br />\n|; |
213
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} |
214
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215
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open my $fh, '>:utf8', 'index.html'; |
216
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print {$fh} $html; |
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217
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close $fh; |
218
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} |
219
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220
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############################################################################### |
221
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# |
222
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# add_cover() |
223
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# |
224
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# Add a cover image to the eBook. Add cover metadata for iBooks and add an |
225
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# additional cover page for other eBook readers. |
226
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# |
227
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sub add_cover |
228
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{ |
229
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0
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0
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my ($conf, $epub, $cover_image) = @_; |
230
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231
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# Check if the cover image exists. |
232
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0
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0
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if (!-e $cover_image) |
233
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{ |
234
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warn "Cover image $cover_image not found.\n"; |
235
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return; |
236
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} |
237
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238
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# Add cover metadata for iBooks. |
239
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0
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|
my $cover_id = $epub->copy_image($cover_image, 'images/cover.png'); |
240
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|
$epub->add_meta_item('cover', $cover_id); |
241
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242
|
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|
|
# Add an additional cover page for other eBook readers. |
243
|
0
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|
|
my $cover_xhtml = <<END_XHTML; |
244
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|
<?xml version="1.0" encoding="UTF-8"?> |
245
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" |
246
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"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> |
247
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> |
248
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<head> |
249
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<title></title> |
250
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> |
251
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<style type="text/css">img { max-width: 100%; }</style> |
252
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|
</head> |
253
|
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|
<body> |
254
|
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|
|
<p><img alt="$conf->{book}{title}" src="../images/cover.png" /></p> |
255
|
|
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|
|
</body> |
256
|
|
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|
</html> |
257
|
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258
|
|
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|
|
END_XHTML |
259
|
|
|
|
|
|
|
|
260
|
|
|
|
|
|
|
# Create the cover xhtml file. |
261
|
0
|
|
|
|
|
|
my $cover_filename = './build/html/cover.xhtml'; |
262
|
0
|
|
|
|
|
|
open my $cover_fh, '>:utf8', $cover_filename; |
263
|
|
|
|
|
|
|
|
264
|
0
|
|
|
|
|
|
print $cover_fh $cover_xhtml; |
265
|
0
|
|
|
|
|
|
close $cover_fh; |
266
|
|
|
|
|
|
|
|
267
|
|
|
|
|
|
|
# Add the cover page to the ePub doc. |
268
|
0
|
|
|
|
|
|
$epub->copy_xhtml($cover_filename, 'text/cover.xhtml' ); |
269
|
0
|
|
|
|
|
|
unlink $cover_filename; |
270
|
|
|
|
|
|
|
|
271
|
|
|
|
|
|
|
# Add the cover to the OPF guide. |
272
|
0
|
|
|
|
|
|
my $guide_options = |
273
|
|
|
|
|
|
|
{ |
274
|
|
|
|
|
|
|
type => 'cover', |
275
|
|
|
|
|
|
|
href => 'text/cover.xhtml', |
276
|
|
|
|
|
|
|
title => 'Cover', |
277
|
|
|
|
|
|
|
}; |
278
|
|
|
|
|
|
|
|
279
|
0
|
|
|
|
|
|
$epub->guide->add_reference($guide_options); |
280
|
|
|
|
|
|
|
|
281
|
0
|
|
|
|
|
|
return $cover_id; |
282
|
|
|
|
|
|
|
} |
283
|
|
|
|
|
|
|
|
284
|
|
|
|
|
|
|
1; |
285
|
|
|
|
|
|
|
|
286
|
|
|
|
|
|
|
__END__ |
287
|
|
|
|
|
|
|
|
288
|
|
|
|
|
|
|
=pod |
289
|
|
|
|
|
|
|
|
290
|
|
|
|
|
|
|
=encoding UTF-8 |
291
|
|
|
|
|
|
|
|
292
|
|
|
|
|
|
|
=head1 NAME |
293
|
|
|
|
|
|
|
|
294
|
|
|
|
|
|
|
Pod::PseudoPod::Book::Command::buildepub - command module for C<ppbook buildepub> |
295
|
|
|
|
|
|
|
|
296
|
|
|
|
|
|
|
=head1 VERSION |
297
|
|
|
|
|
|
|
|
298
|
|
|
|
|
|
|
version 1.20210620.2051 |
299
|
|
|
|
|
|
|
|
300
|
|
|
|
|
|
|
=head1 AUTHOR |
301
|
|
|
|
|
|
|
|
302
|
|
|
|
|
|
|
chromatic <chromatic@wgz.org> |
303
|
|
|
|
|
|
|
|
304
|
|
|
|
|
|
|
=head1 COPYRIGHT AND LICENSE |
305
|
|
|
|
|
|
|
|
306
|
|
|
|
|
|
|
This software is copyright (c) 2011 by chromatic. |
307
|
|
|
|
|
|
|
|
308
|
|
|
|
|
|
|
This is free software; you can redistribute it and/or modify it under |
309
|
|
|
|
|
|
|
the same terms as the Perl 5 programming language system itself. |
310
|
|
|
|
|
|
|
|
311
|
|
|
|
|
|
|
=cut |