Class: Gmi2LaTeX::Renderer

Inherits:
Object
  • Object
show all
Defined in:
lib/gmi2latex/renderer.rb

Instance Method Summary collapse

Constructor Details

#initialize(document, header: nil, footer: nil) ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/gmi2latex/renderer.rb', line 5

def initialize(document, header: nil, footer: nil)
  @document = document
  @header = header
  @footer = footer
end

Instance Method Details

#end_itemize ⇒ Object 



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# File 'lib/gmi2latex/renderer.rb', line 111

def end_itemize
  @listing or return
  @listing = false
  print "\\end{itemize}\n"
end

#end_text ⇒ Object 



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# File 'lib/gmi2latex/renderer.rb', line 105

def end_text
  @was_text or return
  print "\n"
  @was_text = false
end

#render ⇒ Object 



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# File 'lib/gmi2latex/renderer.rb', line 13

def render
  @header and print @header
  @document.nodes.each { |node| render_node(node) }
  end_itemize
  @footer and print @footer
end

#render_list_item(content) ⇒ Object 



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# File 'lib/gmi2latex/renderer.rb', line 89

def render_list_item(content)
  if @listing
    print <<~LaTeX
      \\item{}
      #{content}
    LaTeX
  else
    print <<~LaTeX
      \\begin{itemize}
      \\item{}
      #{content}
    LaTeX
    @listing = true
  end
end

#render_node(node) ⇒ Object 



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# File 'lib/gmi2latex/renderer.rb', line 20

def render_node(node)
  case node
  in Gemtext::Heading[content:]
    end_text
    end_itemize
    print "\\section{#{content}}\n"
  in Gemtext::SubHeading[content:]
    end_text
    end_itemize
    print "\\subsection{#{content}}\n"
  in Gemtext::SubSubHeading[content:]
    end_text
    end_itemize
    print "\\subsubsection{#{content}}\n"
  in Gemtext::Whitespace
    end_text
    end_itemize
    print "\n"
  in Gemtext::Text[content:]
    render_text(content)
  in Gemtext::Link[target:, description:]
    end_text
    end_itemize
    print "#{description} (\\url{#{target}})\n"
  in Gemtext::Preformatted[content:]
    end_text
    end_itemize
    print <<~LaTeX
      \\begin{verbatim}
      #{content}
      \\end{verbatim}
    LaTeX
  in Gemtext::ListItem[content:]
    end_text
    render_list_item(content)
  else
    raise node.inspect
  end
end

#render_text(content) ⇒ Object 



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# File 'lib/gmi2latex/renderer.rb', line 60

def render_text(content)
  end_itemize
  if content.match(/ \A \s* \Z /x)
    end_text
    print content
  else
    @was_text and print "\\\\\n"
    content.each_char do |char|
      case char
      in "_"
        print "\\_"
      in "#"
        print "\\#"
      in "%"
        print "\\%"
      in "<"
        print "\\textlangle{}"
      in ">"
        print "\\textrangle{}"
      in "`"
        print "\\`{}"
      else
        print char
      end
    end
  end
  @was_text = true
end