Class: Guides::TextileTransformer

Inherits:
Object
  • Object
show all
Defined in:
lib/guides/textile_transformer.rb

Constant Summary collapse

LANGUAGES = 
{ "ruby" => "ruby", "sql" => "sql", "javascript" => "javascript",
"css" => "css", "plain" => "plain", "erb" => "ruby; html-script: true",
"html" => "xml", "xml" => "xml", "shell" => "plain", "yaml" => "yaml" }
NOTES = 
{ "CAUTION" => "warning", "IMPORTANT" => "warning", "WARNING" => "warning",
"INFO" => "info", "TIP" => "info", "NOTE" => "note" }

Instance Method Summary collapse

Constructor Details

#initialize(production = false) ⇒ TextileTransformer

Returns a new instance of TextileTransformer.



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# File 'lib/guides/textile_transformer.rb', line 21

def initialize(production=false)
  @production = production
end

Instance Method Details

#consume_construction ⇒ Object 



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# File 'lib/guides/textile_transformer.rb', line 78

def consume_construction
  match = scan_until(%r{</construction>})
  unless @production
    @string = match.pre_match + @string
  end
end

#consume_note(css_class) ⇒ Object 



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# File 'lib/guides/textile_transformer.rb', line 71

def consume_note(css_class)
  match = scan_until /(\r?\n){2,}/ # We need at least 2 line breaks but we want to match as many as exist
  note = match.pre_match.gsub(/\n\s*/, " ")
  note = RedCloth.new(note, [:lite_mode]).to_html
  @output << %{<div class="#{css_class}"><p>#{note}</p></div>\n}
end

#flush_textile ⇒ Object 



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# File 'lib/guides/textile_transformer.rb', line 85

def flush_textile
  @output << RedCloth.new(@pending_textile).to(HTMLFormatter) << "\n"
  @pending_textile = ""
end

#generate_brushes(tag, replace, filename) ⇒ Object 



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# File 'lib/guides/textile_transformer.rb', line 57

def generate_brushes(tag, replace, filename)
  match = scan_until %r{</#{tag}>}
  @output << %{<div class="code_container">\n}
  @output << %{<div class="filename">#{filename}</div>\n} if filename
  @output << %{<pre class="brush: #{replace}; gutter: false; toolbar: false">\n} <<
             CGI.escapeHTML(match.pre_match) << %{</pre></div>}
end

#scan_until(regex) ⇒ Object 



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# File 'lib/guides/textile_transformer.rb', line 65

def scan_until(regex)
  match = @string.match(regex)
  @string = match.post_match
  match
end

#transform(string) ⇒ Object 



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# File 'lib/guides/textile_transformer.rb', line 25

def transform(string)
  @string = string.dup

  @output  = ""
  @pending_textile = ""

  until @string.empty?
    notes     = NOTES.keys.map {|note| "#{note}" }.join("|")
    languages = LANGUAGES.keys.join("|")

    match = scan_until /(\+(\S.*?\S?)\+|<(#{languages})(?: filename=["']([^"']*)["'])?>|(#{notes}): |<(construction)>|\z)/m

    @pending_textile << match.pre_match

    if match[2]    # +foo+
      @pending_textile << "<notextile><tt>#{CGI.escapeHTML(match[2])}</tt></notextile>" if match[2]
    elsif match[3] # <language>
      flush_textile
      generate_brushes match[3], LANGUAGES[match[3]], match[4]
    elsif match[5] # NOTE:
      flush_textile
      consume_note NOTES[match[5]]
    elsif match[6] # <construction>
      consume_construction
    end
  end

  flush_textile

  @output
end