Module: PostModern::Render::ClassMethods

Defined in:
lib/post-modern/render.rb

Instance Method Summary collapse

Instance Method Details

#filter_code!(content, pretty = true) ⇒ Object 



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# File 'lib/post-modern/render.rb', line 70

def filter_code!(content, pretty = true)
  html = Nokogiri::HTML(content)#::fragment(content, 'utf-8')
  html.encoding = "utf-8"
  
  index = 0
  
  # code
  all_lines = 0
  html.css("pre").each do |code|
    index += 1
    liners      = ""
    source      = ""
    lines       = code.text.strip.split("\n")
    language    = code["lang"].to_s
    language    = language.present? ? language : "text"
    language = case language
    when "yml"
      :yaml
    when "coffee", "coffee-script", "coffeescript"
      :coffeescript
    else # sass, scss, css, rbcon, irb
      language.to_sym
    end
    total_lines = lines.size
    
    total_lines.times do |ln|
      liners += "<span id='L#{all_lines + ln+1}' rel='#LC#{all_lines + ln+1}'>#{ln+1}</span>\n"
    end
    
    lines.each_with_index do |line, i|
      code_line = line.blank? ? line.to_s : Albino.new(line, language).to_s
      code_line.gsub!(/<div class="highlight"><pre>|\n<\/pre>|\n<\/div>/,'')
      #code_line.gsub!(/^([ ])+/){|m| "&nbsp;"*m.size}
      code_line = "<br/>" if code_line.strip == ''
      source += "<div class='line' id='LC#{all_lines + i+1}'>#{code_line}</div>"
    end

    all_lines += total_lines

    liners_block = %{<td>
    <pre class='line-numbers'>#{liners}</pre>
  </td>}

    source_block = %{<td>
    <pre class='highlight'>#{source}</pre>
  </td>}

    output = %{
  <table cellpadding='0' cellspacing='0'>
  <tr>
  #{liners_block}
  #{source_block}
  </tr>
  </table>
  }
    code.name = "div"
    code.set_attribute "class", "data type-#{language}"
    code.set_attribute "id", "code-block-#{index}"
    #code.inner_html = "<div class='highlight'><pre>#{source}</pre></div>"#output
    code.inner_html = output#.gsub(/^([ ])+/){|m| "&nbsp;"*m.size}.gsub(/\n/, "")
  end
  
  if pretty
    pretty_html(html)#.gsub(/^([ ])+/){|m| "&nbsp;"*m.size}.gsub(/\n/, "")
  else
    html.to_html.gsub(/^([ ])+/){|m| "&nbsp;"*m.size}.gsub(/\n/, "")
  end
end

#filter_code_faster_todo!(content, pretty = true) ⇒ Object

pygmentize -f html -O style=colorful,linenos=table,anchorlinenos,lineanchors=LC -l ruby tmp.rb



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# File 'lib/post-modern/render.rb', line 140

def filter_code_faster_todo!(content, pretty = true)
  index = 0

  # code
  all_lines = 0
  content.scan(/\`{3}\s*(\w+)?\n*(?:([^\`]{3}*))\n*\`{3}/m).each do |lang, code|
    match = $&
    html = Nokogiri::HTML::fragment(code, "utf-8")#::fragment(content, 'utf-8')

    index += 1
    language    = lang
    language    = language.present? ? language : "text"
    language = case language
    when "yml"
      :yaml
    when "coffee", "coffee-script", "coffeescript"
      :coffeescript
    else # sass, scss, css, rbcon, irb
      language.to_sym
    end

    output = Albino.new(code.strip, language).to_s

    output = "<div class='data type-#{language}' id='code-block-#{index}' lang='#{language}'>\n#{output}\n</div>"
    content.gsub!(match, output)
  end

  content
end

#filter_haml!(code, locals = {}) ⇒ Object 



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# File 'lib/post-modern/render.rb', line 66

def filter_haml!(code, locals = {})
  Haml::Engine.new(code).render(Object.new, locals).gsub(/^\n/, "").gsub(/\n$/, "")
end

#pretty_html(html) ⇒ Object

can check prev/next elements to make it even prettier with correct “n” do that in xslt.



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# File 'lib/post-modern/render.rb', line 40

def pretty_html(html)
  return "" if html.nil?
  raise "will throw segmentation error if not an Nokogiri::XML::Document" unless html.is_a?(Nokogiri::XML::Document)
  pretty_printer = File.join(File.dirname(__FILE__), "pretty-print.xsl")
  xsl = Nokogiri::XSLT(IO.read(pretty_printer))
  xsl.transform(html).css("body").children.map do |child|
    if child["class"].to_s.split(/\s+/).include?("data")
      "\n" + html.css("##{child["id"]}").to_html.gsub(/^([ ])+/){|m| "&nbsp;"*m.size}.gsub(/\n/, "") + "\n"
    else
      child.to_html.gsub(/\t/, "").gsub(/^    /, "").gsub(/^\n/, "").gsub(/\n?  $/, "\n")
    end
  end.join("\n").gsub(/\n+/m, "\n").gsub(/^\n/, "")
end

#pretty_html_with_xslt(html) ⇒ Object 



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# File 'lib/post-modern/render.rb', line 54

def pretty_html_with_xslt(html)
  return "" if html.nil?
  raise "will throw segmentation error if not an Nokogiri::XML::Document" unless html.is_a?(Nokogiri::XML::Document)
  html.css("body").children.map do |child|
    if child["class"].to_s.split(/\s+/).include?("data")
      "\n" + html.css("##{child["id"]}").to_html.gsub(/^([ ])+/){|m| "&nbsp;"*m.size}.gsub(/\n/, "") + "\n"
    else
      child.to_html.gsub(/\t/, "").gsub(/^    /, "").gsub(/^\n/, "").gsub(/\n?  $/, "\n")
    end
  end.join("\n").gsub(/\n+/m, "\n").gsub(/^\n/, "")
end

#render(content, locals = {}) ⇒ Object 



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# File 'lib/post-modern/render.rb', line 19

def render(content, locals = {})
  # filter haml, scss
  if locals[:filters] && Array(locals[:filters]).include?(:haml)
    content.scan(/@@@ (\w+)\s*(.*)\n@@@/m).each do |lang, code|  
      content.gsub!($&, send("filter_#{lang}!", code, locals))
    end
  end
  
  # convert to markdown
  content = Redcarpet.new(content, :autolink, :fenced_code, :gh_blockcode).to_html
  
  # filter code
  if locals[:filters] && Array(locals[:filters]).include?(:highlight)
    content = filter_code!(content, locals[:filters].include?(:pretty))
  end
  
  content
end