Class: MdToBbcode::BbcodeRenderer

Inherits:
Redcarpet::Render::StripDown
  • Object
show all
Defined in:
lib/md_to_bbcode/bbcode_renderer.rb

Constant Summary collapse

MARKER_BOLD = 
'--MdToBbcode--Bold--'
MARKER_ITALIC = 
'--MdToBbcode--Italic--'

Instance Method Summary collapse

Instance Method Details

#block_code(code, language) ⇒ Object 



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# File 'lib/md_to_bbcode/bbcode_renderer.rb', line 118

def block_code(code, language)
  "[code]#{code.
    gsub(MARKER_BOLD, '**').
    gsub(MARKER_ITALIC, '*')
  }[/code]\n"
end

#codespan(code) ⇒ Object 



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# File 'lib/md_to_bbcode/bbcode_renderer.rb', line 93

def codespan(code)
  "[b][font=Courier New]#{code.
    gsub(MARKER_BOLD, '**').
    gsub(MARKER_ITALIC, '*')
  }[/font][/b]"
end

#double_emphasis(text) ⇒ Object 



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# File 'lib/md_to_bbcode/bbcode_renderer.rb', line 69

def double_emphasis(text)
  # In case the text already contains bold tags (which can be the case as codespan uses them), remove them.
  "[b]#{text.gsub('[b]', '').gsub('[/b]', '')}[/b]"
end

#emphasis(text) ⇒ Object 



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# File 'lib/md_to_bbcode/bbcode_renderer.rb', line 65

def emphasis(text)
  "[i]#{text}[/i]"
end

#header(text, header_level) ⇒ Object 



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# File 'lib/md_to_bbcode/bbcode_renderer.rb', line 78

def header(text, header_level)
  case header_level
  when 1
    "\n[size=6][b]#{text}[/b][/size]\n\n"
  when 2
    "\n[size=6]#{text}[/size]\n\n"
  when 3
    "\n[size=5][b]#{text}[/b][/size]\n\n"
  when 4
    "\n[size=5]#{text}[/size]\n\n"
  else
    "\n[size=4][b]#{text}[/b][/size]\n\n"
  end
end

#image(link, title, alt_text) ⇒ Object 



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# File 'lib/md_to_bbcode/bbcode_renderer.rb', line 100

def image(link, title, alt_text)
  "[img]#{link}[/img]"
end

#link(link, title, content) ⇒ Object 



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# File 'lib/md_to_bbcode/bbcode_renderer.rb', line 74

def link(link, title, content)
  "[url=#{link}]#{content}[/url]"
end

#list(contents, list_type) ⇒ Object 



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# File 'lib/md_to_bbcode/bbcode_renderer.rb', line 104

def list(contents, list_type)
  case list_type
  when :ordered
    "[list=1]\n#{contents}[/list]\n"
  else
    "[list]\n#{contents}[/list]\n"
  end
end

#list_item(text, list_type) ⇒ Object 



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# File 'lib/md_to_bbcode/bbcode_renderer.rb', line 113

def list_item(text, list_type)
  # If the item spans multiple lines, prefix each new line with 2 spaces to keep the list running.
  "[*]#{text.split(/(?<=\n)/).join("  ")}"
end

#postprocess(doc) ⇒ Object 



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# File 'lib/md_to_bbcode/bbcode_renderer.rb', line 20

def postprocess(doc)
  # Convert bold and italic correctly due to bug https://github.com/vmg/redcarpet/issues/396
  bbcode_lines = []
  in_bold_text = false
  in_italic_text = false
  # Due to Redcarpet bug https://github.com/vmg/redcarpet/issues/600 we have to change some in-line code to blocks
  # TODO: Remove when Redcarpet will be fixed
  doc.split("\n").map do |line|
    case line
    when /^(\s*)\[b\]\[font=Courier New\]([^\[]*)$/
      "#{$1}[code]"
    when /^(\s*)\[\/font\]\[\/b\]$/
      "#{$1}[/code]"
    else
      # Replace the bold markers with [b] or [/b], and
      # make sure we remove occurences of bold text ([b] and [/b] already part of the text) when bold is already applied: this can happen as we use bold text for inline code
      # TODO: Remove this when https://github.com/vmg/redcarpet/issues/396 will be corrected
      fields = line.split(MARKER_BOLD) + (line.end_with?(MARKER_BOLD) ? [''] : [])
      line = fields.map.with_index do |field, idx|
        content = in_bold_text ? field.gsub('[b]', '').gsub('[/b]', '') : field
        if idx == fields.size - 1
          content
        else
          in_bold_text = !in_bold_text
          "#{content}[#{in_bold_text ? '' : '/'}b]"
        end
      end.join
      # Italic
      if in_italic_text
        line.gsub!(/#{Regexp.escape(MARKER_ITALIC)}(\S.*?)#{Regexp.escape(MARKER_ITALIC)}/, '[/i]\1[i]')
      else
        line.gsub!(/#{Regexp.escape(MARKER_ITALIC)}(\S.*?)#{Regexp.escape(MARKER_ITALIC)}/, '[i]\1[/i]')
      end
      if in_italic_text && line =~ /.*\S#{Regexp.escape(MARKER_ITALIC)}.*/
        line.gsub!(/(.*\S)#{Regexp.escape(MARKER_ITALIC)}(.*)/, '\1[/i]\2')
        in_italic_text = false
      elsif !in_italic_text && line =~ /.*#{Regexp.escape(MARKER_ITALIC)}\S.*/
        line.gsub!(/(.*)#{Regexp.escape(MARKER_ITALIC)}(\S.*)/, '\1[i]\2')
        in_italic_text = true
      end
      line
    end
  end.join("\n").gsub('<br>', "\n")
end

#preprocess(doc) ⇒ Object 



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# File 'lib/md_to_bbcode/bbcode_renderer.rb', line 10

def preprocess(doc)
  # Due to Redcarpet bug https://github.com/vmg/redcarpet/issues/396 we have to handle bold and italic conversions before hand
  # Be careful to mark them uniquely so that we don't convert them if they were in a code block
  # TODO: Remove this when Redcarpet bug will be fixed
  doc.
    gsub('**', MARKER_BOLD).
    gsub(/\*(\S|$)/, "#{MARKER_ITALIC}\\1").
    gsub(/(\S)\*/, "\\1#{MARKER_ITALIC}")
end