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 117

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 111

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 11

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

#render_link(target, description:) ⇒ Object 



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# File 'lib/gmi2latex/renderer.rb', line 101

def render_link(target, description:)
  end_text
  end_itemize
  if description.empty?
    print "☞ \\url{#{target}}\n"
  else
    print "☞ #{description} (\\url{#{target}})\n"
  end
end

#render_list_item(content) ⇒ Object 



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# File 'lib/gmi2latex/renderer.rb', line 85

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 18

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:]
    render_link(target, description:)
  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 56

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