Module: Softcover::EpubUtils

Included in:
Builders::Epub, Builders::Mobi
Defined in:
lib/softcover/builders/epub.rb

Instance Method Summary collapse

Instance Method Details

#content_opf_template(escaped_title, copyright, author, uuid, cover_id, toc_chapters, manifest_chapters, images) ⇒ Object

Returns a content.opf file based on a valid template.



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# File 'lib/softcover/builders/epub.rb', line 55

def content_opf_template(escaped_title, copyright, author, uuid, cover_id,
                         toc_chapters, manifest_chapters, images)
  if cover_id
    cover_meta = %(<meta name="cover" content="#{cover_id}"/>)
    cover_html = %(<item id="cover" href="#{cover_filename}" media-type="application/xhtml+xml"/>)
    cover_ref  = '<itemref idref="cover" linear="no" />'
  else
    cover_meta = cover_html = cover_ref = ''
  end
%(<?xml version="1.0" encoding="UTF-8"?>
<package unique-identifier="BookID" version="3.0" xmlns="http://www.idpf.org/2007/opf">
  <metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/"
  xmlns:opf="http://www.idpf.org/2007/opf">
  <dc:title>#{escaped_title}</dc:title>
  <dc:language>en</dc:language>
  <dc:rights>Copyright (c) #{copyright} #{escape(author)}</dc:rights>
  <dc:creator>#{escape(author)}</dc:creator>
  <dc:publisher>Softcover</dc:publisher>
  <dc:identifier id="BookID">urn:uuid:#{uuid}</dc:identifier>
  <meta property="dcterms:modified">#{Time.now.strftime('%Y-%m-%dT%H:%M:%S')}Z</meta>
  #{cover_meta}
  </metadata>
  <manifest>
  <item href="#{nav_filename}" id="nav" media-type="application/xhtml+xml" properties="nav"/>
  <item id="ncx" href="toc.ncx" media-type="application/x-dtbncx+xml"/>
  <item id="page-template.xpgt" href="styles/page-template.xpgt" media-type="application/vnd.adobe-page-template+xml"/>
  <item id="pygments.css" href="styles/pygments.css" media-type="text/css"/>
  <item id="softcover.css" href="styles/softcover.css" media-type="text/css"/>
  <item id="epub.css" href="styles/epub.css" media-type="text/css"/>
  <item id="custom.css" href="styles/custom.css" media-type="text/css"/>
  <item id="custom_epub.css" href="styles/custom_epub.css" media-type="text/css"/>
  #{cover_html}
  #{manifest_chapters.join("\n")}
  #{images.join("\n")}
  </manifest>
  <spine toc="ncx">
#{cover_ref}
#{toc_chapters.join("\n")}
  </spine>
</package>
)
end

#cover?(options = {}) ⇒ Boolean

Returns true when producing a cover. We include a cover when not producing an Amazon-specific book as long as there’s a cover image. (When uploading a book to Amazon KDP, the cover gets uploaded separately, so the MOBI file itself should have not have a cover.)

Returns:

  • (Boolean) 


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# File 'lib/softcover/builders/epub.rb', line 24

def cover?(options={})
  !options[:amazon] && cover_img
end

#cover_filename ⇒ Object 



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# File 'lib/softcover/builders/epub.rb', line 28

def cover_filename
  xhtml("cover.#{html_extension}")
end

#cover_img ⇒ Object

Returns the name of the cover file. We support (in order) JPG/JPEG, PNG, and TIFF.



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# File 'lib/softcover/builders/epub.rb', line 6

def cover_img
  extensions = %w[jpg jpeg png tiff]
  extensions.each do |ext|
    origin = "images/cover.#{ext}"
    target = "#{images_dir}/cover.#{ext}"
    if File.exist?(origin)
      FileUtils.cp(origin, target)
      return File.basename(target)
    end
  end
  return false
end

#cover_img_path ⇒ Object 



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# File 'lib/softcover/builders/epub.rb', line 37

def cover_img_path
  path("#{images_dir}/#{cover_img}")
end

#escape(string) ⇒ Object 



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# File 'lib/softcover/builders/epub.rb', line 50

def escape(string)
  CGI.escape_html(string)
end

#images_dir ⇒ Object 



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# File 'lib/softcover/builders/epub.rb', line 41

def images_dir
  path('epub/OEBPS/images')
end

#nav_filename ⇒ Object 



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# File 'lib/softcover/builders/epub.rb', line 45

def nav_filename
  xhtml("nav.#{html_extension}")
end

#nav_html_template(escaped_title, nav_list) ⇒ Object

Returns the navigation HTML based on a valid template.



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# File 'lib/softcover/builders/epub.rb', line 119

def nav_html_template(escaped_title, nav_list)
%(<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops">
<head>
    <meta charset="UTF-8" />
    <title>#{escaped_title}</title>
</head>
<body>
    <nav epub:type="toc">
        <h1>#{escaped_title}</h1>
        <ol>
          #{nav_list.join("\n")}
        </ol>
    </nav>
</body>
</html>
)
end

#toc_ncx_template(escaped_title, uuid, chapter_nav) ⇒ Object

Returns a toc.ncx file based on a valid template.



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# File 'lib/softcover/builders/epub.rb', line 99

def toc_ncx_template(escaped_title, uuid, chapter_nav)
%(<?xml version="1.0" encoding="UTF-8"?>
<ncx xmlns="http://www.daisy.org/z3986/2005/ncx/" version="2005-1">
<head>
    <meta name="dtb:uid" content="urn:uuid:#{uuid}"/>
    <meta name="dtb:depth" content="2"/>
    <meta name="dtb:totalPageCount" content="0"/>
    <meta name="dtb:maxPageNumber" content="0"/>
</head>
<docTitle>
    <text>#{escaped_title}</text>
</docTitle>
<navMap>
  #{chapter_nav.join("\n")}
</navMap>
</ncx>
)
end

#xhtml(filename) ⇒ Object

Transforms foo.html to foo.xhtml



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# File 'lib/softcover/builders/epub.rb', line 33

def xhtml(filename)
  filename.sub('.html', '.xhtml')
end