Module: MaRuKu::Out::HTML

Included in:
MDElement
Defined in:
lib/maruku/output/to_html.rb,
lib/maruku.rb,
lib/maruku/ext/div.rb,
lib/maruku/ext/math/to_html.rb,
lib/maruku/ext/math/mathml_engines/none.rb,
lib/maruku/ext/math/mathml_engines/ritex.rb,
lib/maruku/ext/math/mathml_engines/blahtex.rb,
lib/maruku/ext/math/mathml_engines/itex2mml.rb

Overview

This module groups all functions related to HTML export.

Defined Under Namespace

Classes: HTMLElement, PNG

Constant Summary collapse

Xhtml11_mathml2_svg11 = 
'<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC
    "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN"
    "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">
'
HTML4Attributes =

begin maruku_doc

Attribute: style Scope: element Output: HTML

It is copied as a standard HTML attribute.

end

{}

Instance Method Summary collapse

Instance Method Details

#add_class_to(el, cl) ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 627

def add_class_to(el, cl)
  el['class'] =
    if already = el['class']
      already + " " + cl
    else
      cl
    end
end

#add_css_to(head) ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 223

def add_css_to(head)
  if css_list = self.attributes[:css]
    css_list.split.each do |css|
      # <link type="text/css" rel="stylesheet" href="..." />
      link = xelem('link')
      link['type'] = 'text/css'
      link['rel'] = 'stylesheet'
      link['href'] = css
      head << link << xml_newline
    end
  end
end

#add_ws(e) ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 675

def add_ws(e)
  [xml_newline, e, xml_newline]
end

#adjust_png(png, use_depth) ⇒ Object 



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# File 'lib/maruku/ext/math/to_html.rb', line 79

def adjust_png(png, use_depth)
  src = png.src

  height_in_px = png.height
  depth_in_px = png.depth
  height_in_ex = height_in_px / pixels_per_ex
  depth_in_ex = depth_in_px / pixels_per_ex
  total_height_in_ex = height_in_ex + depth_in_ex
  style = ""
  style << "vertical-align: -#{depth_in_ex}ex;" if use_depth
  style << "height: #{total_height_in_ex}ex;"

  img = xelem('img')
  img['src'] = src
  img['style'] = style
  img['alt'] = "$#{self.math.strip}$"
  img['class'] = 'maruku-png'
  img
end

#array_to_html(array) ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 868

def array_to_html(array)
  e = []
  array.each do |c|
    if c.kind_of?(String)
      e << xtext(c)
    else
      if c.kind_of?(HTMLElement)
        e << c
        next
      end

      method = c.kind_of?(MaRuKu::MDElement) ? "to_html_#{c.node_type}" : "to_html"
      next unless c.respond_to?(method)

      h = c.send(method)

      unless h
        raise "Nil html created by method  #{method}:\n#{h.inspect}\n" +
          " for object #{c.inspect[0,300]}"
      end

      if h.kind_of? Array
        e.concat h
      else
        e << h
      end
    end
  end
  e
end

#children_to_html ⇒ Object

Convert each child to html



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# File 'lib/maruku/output/to_html.rb', line 864

def children_to_html
  array_to_html(@children)
end

#convert_to_mathml_blahtex(kind, tex) ⇒ Object 



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# File 'lib/maruku/ext/math/mathml_engines/blahtex.rb', line 59

def convert_to_mathml_blahtex(kind, tex)
  result = run_blahtex(tex, %w[--mathml])

  doc = REXML::Document.new(result)
  mathml = doc.get_elements('//markup').to_a.first
  unless mathml
    maruku_error "Blahtex error: \n#{doc}"
    return nil
  end

  mathml.name = 'math'
  mathml.attributes['xmlns'] = "http://www.w3.org/1998/Math/MathML"
  mathml.attributes['display'] = (kind == :inline) ? :inline : :block

  MaRuKu::HTMLFragment.new(mathml.to_s)
rescue => e
  maruku_error "Error: #{e}"
  nil
end

#convert_to_mathml_itex2mml(kind, tex) ⇒ Object 



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# File 'lib/maruku/ext/math/mathml_engines/itex2mml.rb', line 2

def convert_to_mathml_itex2mml(kind, tex)
  return if $already_warned_itex2mml
  begin
    require 'itextomml'
  rescue LoadError => e
    maruku_error "Could not load package 'itex2mml'.\nPlease install it." unless $already_warned_itex2mml
    $already_warned_itex2mml = true
    return nil
  end

  begin
    require 'instiki_stringsupport'
  rescue LoadError
    require 'itex_stringsupport'
  end

  parser = Itex2MML::Parser.new
  mathml =
    case kind
    when :equation
      parser.block_filter(tex)
    when :inline
      parser.inline_filter(tex)
    else
      maruku_error "Unknown itex2mml kind: #{kind}"
      return
    end

  MaRuKu::HTMLFragment.new(mathml.to_utf8)
rescue => e
  maruku_error "Invalid MathML TeX: \n#{tex.gsub(/^/, 'tex>')}\n\n #{e.inspect}"
  nil
end

#convert_to_mathml_none(kind, tex) ⇒ Object 



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# File 'lib/maruku/ext/math/mathml_engines/none.rb', line 2

def convert_to_mathml_none(kind, tex)
  code = xelem('code')
  tex_node = xtext(tex)
  code << tex_node
end

#convert_to_mathml_ritex(kind, tex) ⇒ Object 



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# File 'lib/maruku/ext/math/mathml_engines/ritex.rb', line 2

def convert_to_mathml_ritex(kind, tex)
	begin
		if not $ritex_parser
			require 'ritex'
		 	$ritex_parser = Ritex::Parser.new
		end
		
		mathml =  $ritex_parser.parse(tex.strip)
		doc = Document.new(mathml, {:respect_whitespace =>:all}).root
		return doc
	rescue LoadError => e
		maruku_error "Could not load package 'ritex'.\n"+
		"Please install it using:\n"+
		"   $ gem install ritex\n\n"+e.inspect
	rescue Racc::ParseError => e
		maruku_error "Could not parse TeX: \n#{tex}"+
			"\n\n #{e.inspect}"
	end
	nil
end

#convert_to_png_blahtex(kind, tex) ⇒ Object 



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# File 'lib/maruku/ext/math/mathml_engines/blahtex.rb', line 8

def convert_to_png_blahtex(kind, tex)
  FileUtils.mkdir_p get_setting(:html_png_dir)

  # first, we check whether this image has already been processed
  md5sum = Digest::MD5.hexdigest(tex + " params: ")
  result_file = File.join(get_setting(:html_png_dir), md5sum + ".txt")

  if File.exists?(result_file)
    result = File.read(result_file)
  else
    args = [
            '--png',
            '--use-preview-package',
            '--shell-dvipng',
            "dvipng -D #{Shellwords.shellescape(get_setting(:html_png_resolution).to_s)}",
            "--temp-directory #{Shellwords.shellescape(get_setting(:html_png_dir))}",
            "--png-directory #{Shellwords.shellescape(get_setting(:html_png_dir))}"
           ]
    args << '--displaymath' if kind == :equation

    result = run_blahtex(tex, args)
  end

  if result.nil? || result.empty?
    maruku_error "Blahtex error: empty output"
    return
  end

  doc = REXML::Document.new(result)
  png = doc.root.elements.to_a.first
  if png.name != 'png'
    maruku_error "Blahtex error: \n#{doc}"
    return
  end

  raise "No depth element in:\n #{doc}" unless depth = png.xpath('//depth')[0]
  raise "No height element in:\n #{doc}" unless height = png.xpath('//height')[0]
  raise "No md5 element in:\n #{doc}" unless md5 = png.xpath('//md5')[0]

  depth = depth.text.to_f
  height = height.text.to_f
  raise "Height or depth was 0! in \n #{doc}" if height == 0 || depth == 0

  md5 = md5.text

  PNG.new("#{get_setting(:html_png_url)}#{md5}.png", depth, height)
rescue => e
  maruku_error "Error: #{e}"
  nil
end

#convert_to_png_none(kind, tex) ⇒ Object 



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# File 'lib/maruku/ext/math/mathml_engines/none.rb', line 8

def convert_to_png_none(kind, tex)
  nil
end

#day_suffix(day) ⇒ Object

returns “st”,“nd”,“rd” or “th” as appropriate



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# File 'lib/maruku/output/to_html.rb', line 237

def day_suffix(day)
  s = {
    1 => 'st',
    2 => 'nd',
    3 => 'rd',
    21 => 'st',
    22 => 'nd',
    23 => 'rd',
    31 => 'st'
  }
  s[day] || 'th';
end

#html_element(name, content = "", attributes = {}) ⇒ Object

Pretty much the same as the HTMLElement constructor except it copies standard attributes out of the Maruku Element’s attributes hash.



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# File 'lib/maruku/output/to_html.rb', line 388

def html_element(name, content="", attributes={})
  if attributes.empty? && content.is_a?(Hash)
    attributes = content
  end

  Array(HTML4Attributes[name]).each do |att|
    if v = @attributes[att]
      attributes[att.to_s] = v.to_s
    end
  end
  content = yield if block_given?

  HTMLElement.new(name, attributes, content)
end

#maruku_html_signature ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 257

def maruku_html_signature
  div = xelem('div')
  div['class'] = 'maruku_signature'
  div << xelem('hr')
  span = xelem('span')
  span['style'] = 'font-size: small; font-style: italic'
  div << span << xtext('Created by ')
  a = xelem('a')
  a['href'] = MaRuKu::MARUKU_URL
  a['title'] = 'Maruku: a Markdown-superset interpreter for Ruby'
  a << xtext('Maruku')
  span << xtext(nice_date + ".")
  div
end

#nice_date ⇒ Object

formats a nice date



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# File 'lib/maruku/output/to_html.rb', line 251

def nice_date
  Time.now.strftime(" at %H:%M on %A, %B %d") +
    day_suffix(t.day) +
    t.strftime(", %Y")
end

#obfuscate(s) ⇒ Object

Email address



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# File 'lib/maruku/output/to_html.rb', line 681

def obfuscate(s)
  s.bytes.inject('') do |res, char|
    res << "&#%03d;" % char
  end
end

#pixels_per_ex ⇒ Object 



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# File 'lib/maruku/ext/math/to_html.rb', line 75

def pixels_per_ex
  $pixels_per_ex ||= render_png(:inline, "x").height
end

#render_footnotes ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 272

def render_footnotes
  div = xelem('div')
  div['class'] = 'footnotes'
  div << xelem('hr')
  ol = xelem('ol')

  @doc.footnotes_order.each_with_index do |fid, i|
    num = i + 1
    if f = self.footnotes[fid]
      li = f.wrap_as_element('li')
      li['id'] = "#{get_setting(:doc_prefix)}fn:#{num}"

      a = xelem('a')
      a['href'] = "\##{get_setting(:doc_prefix)}fnref:#{num}"
      a['rev'] = 'footnote'
      a << xtext([8617].pack('U*'))

      last = nil
      li.children.reverse_each do |child|
        if child.is_a?(HTMLElement)
          last = child
          break
        end
      end

      if last && last.name == "p"
        last << xtext(' ') << a
      else
        li.children << a
      end
      ol << li
    else
      maruku_error "Could not find footnote id '#{fid}' among [#{self.footnotes.keys.inspect}]."
    end
  end

  div << ol
end

#render_mathml(kind, tex) ⇒ MaRuKu::Out::HTML::HTMLElement

Creates an xml Mathml document of this node’s TeX code.

Returns:



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# File 'lib/maruku/ext/math/to_html.rb', line 47

def render_mathml(kind, tex)
  engine = get_setting(:html_math_engine)
  method = "convert_to_mathml_#{engine}"
  if self.respond_to? method
    mathml = self.send(method, kind, tex)
    return mathml || convert_to_mathml_none(kind, tex)
  end

  # TODO: Warn here
  puts "A method called #{method} should be defined."
  convert_to_mathml_none(kind, tex)
end

#render_png(kind, tex) ⇒ MaRuKu::Out::HTML::PNG?

Renders a PNG image of this node’s TeX code. Returns

Returns:

  • (MaRuKu::Out::HTML::PNG, nil) —

    A struct describing the location and size of the image, or nil if no library is loaded that can render PNGs.



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# File 'lib/maruku/ext/math/to_html.rb', line 66

def render_png(kind, tex)
  engine = get_setting(:html_png_engine)
  method = "convert_to_png_#{engine}".to_sym
  return self.send(method, kind, tex) if self.respond_to? method

  puts "A method called #{method} should be defined."
  nil
end

#render_section_number ⇒ Object

nil if not applicable, else SPAN element



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# File 'lib/maruku/output/to_html.rb', line 458

def render_section_number
  return nil unless section_number && !section_number.empty?

  # if we are bound to a section, add section number
  span = xelem('span')
  span['class'] = 'maruku_section_number'
  span << xtext(section_number)
end

#section_number ⇒ Object

nil if not applicable, else string



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# File 'lib/maruku/output/to_html.rb', line 448

def section_number
  return nil unless get_setting(:use_numbered_headers)

  n = Array(@attributes[:section_number])
  return nil if n.empty?

  n.join('.') + ". "
end

#to_html(context = {}) ⇒ Object

Render as an HTML fragment (no head, just the content of BODY). (returns a string)



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# File 'lib/maruku/output/to_html.rb', line 60

def to_html(context={})
  output = ""
  children_to_html.each do |e|
    output << e.to_s
  end

  # render footnotes
  unless @doc.footnotes_order.empty?
    output << render_footnotes
  end

  output
end

#to_html_abbr ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 749

def to_html_abbr
  abbr = xelem('abbr')
  abbr << xtext(children[0])
  abbr['title'] = self.title if self.title
  abbr
end

#to_html_cell ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 828

def to_html_cell
  if @attributes[:scope]
    wrap_as_element('th')
  else
    wrap_as_element('td')
  end
end

#to_html_code ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 512

def to_html_code
  source = self.raw_code

  code_lang = self.lang || self.attributes[:lang] || @doc.attributes[:code_lang]

  code_lang = 'xml' if code_lang == 'html'
  code_lang = 'css21' if code_lang == 'css'

  use_syntax = get_setting :html_use_syntax

  element =
    if use_syntax && code_lang
      begin
        unless $syntax_loaded
          require 'rubygems'
          require 'syntax'
          require 'syntax/convertors/html'
          $syntax_loaded = true
        end
        convertor = Syntax::Convertors::HTML.for_syntax code_lang

        # eliminate trailing newlines otherwise Syntax crashes
        source = source.sub(/\n*\z/, '')

        html = convertor.convert(source)

        html.gsub!(/\&apos;|'/,'&#39;') # IE bug

        d = MaRuKu::HTMLFragment.new(html)
        highlighted = d.to_html.sub(/\A<pre>(.*)<\/pre>\z/m, '\1')
        code = HTMLElement.new('code', { :class => code_lang }, highlighted)

        pre = xelem('pre')
        # add a class here, too, for compatibility with existing implementations
        pre['class'] = code_lang
        pre << code
        pre
      rescue LoadError => e
        maruku_error "Could not load package 'syntax'.\n" +
          "Please install it, for example using 'gem install syntax'."
        to_html_code_using_pre(source, code_lang)
      rescue => e
        maruku_error "Error while using the syntax library for code:\n#{source.inspect}" +
          "Lang is #{code_lang} object is: \n" +
          self.inspect +
          "\nException: #{e.class}: #{e.message}"

        tell_user("Using normal PRE because the syntax library did not work.")
        to_html_code_using_pre(source, code_lang)
      end
    else
      to_html_code_using_pre(source, code_lang)
    end

  color = get_setting(:code_background_color)
  if color != MaRuKu::Globals[:code_background_color]
    element['style'] = "background-color: #{color};"
  end

  add_ws element
end

#to_html_code_using_pre(source, code_lang = nil) ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 593

def to_html_code_using_pre(source, code_lang=nil)
  code = xelem('code')
  pre = xelem('pre')
  pre << code

  if get_setting(:code_show_spaces)
    # 187 = raquo
    # 160 = nbsp
    # 172 = not
    source = source.gsub(/\t/,'&#187;' + '&#160;' * 3).gsub(/ /,'&#172;')
  end

  code << xtext(source)

  code_lang ||= self.attributes[:lang]
  if code_lang
    pre['class'] = code['class'] = code_lang
  end

  pre
end

#to_html_definition ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 786

def to_html_definition
  children_to_html
end

#to_html_definition_data ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 794

def to_html_definition_data
  add_ws wrap_as_element('dd')
end

#to_html_definition_list ⇒ Object

Definition lists ###



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# File 'lib/maruku/output/to_html.rb', line 782

def to_html_definition_list
  add_ws wrap_as_element('dl')
end

#to_html_definition_term ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 790

def to_html_definition_term
  add_ws wrap_as_element('dt')
end

#to_html_div ⇒ Object 



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# File 'lib/maruku/ext/div.rb', line 120

def to_html_div
  add_ws wrap_as_element('div')
end

#to_html_divref ⇒ Object 



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# File 'lib/maruku/ext/math/to_html.rb', line 169

def to_html_divref
  unless hash = self.doc.refid2ref.values.find {|h| h.has_key?(self.refid)}
    maruku_error "Cannot find div #{self.refid.inspect}"
    return xtext("\\ref{#{self.refid}}")
  end
  ref= hash[self.refid]

  a = xelem('a')
  a['class'] = 'maruku-ref'
  a['href'] = "#" + self.refid
  a << xtext(ref.num.to_s)
  a
end

#to_html_document(context = {}) ⇒ Object

Render to a complete HTML document (returns a string)



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# File 'lib/maruku/output/to_html.rb', line 82

def to_html_document(context={})
  doc = to_html_document_tree

  xml = doc.to_s
  Xhtml11_mathml2_svg11 + xml
end

#to_html_document_tree ⇒ Object

Render to a complete HTML document (returns an HTMLElement document tree)



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# File 'lib/maruku/output/to_html.rb', line 156

def to_html_document_tree
  root = xelem('html')
  root['xmlns'] = 'http://www.w3.org/1999/xhtml'
  root['xmlns:svg'] = "http://www.w3.org/2000/svg"
  root['xml:lang'] = self.attributes[:lang] || 'en'

  root << xml_newline
  head = xelem('head')
  root << head

  #<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
  me = xelem('meta')
  me['http-equiv'] = 'Content-type'
  me['content'] = 'application/xhtml+xml;charset=utf-8'
  head << me

  %w(description keywords author revised).each do |m|
    if value = self.attributes[m.to_sym]
      meta = xelem('meta')
      meta['name'] = m
      meta['content'] = value.to_s
      head << meta
    end
  end

  self.attributes.each do |k,v|
    if k.to_s =~ /\Ameta-(.*)\z/
      meta = xelem('meta')
      meta['name'] = $1
      meta['content'] = v.to_s
      head << meta
    end
  end

  # Create title element
  doc_title = self.attributes[:title] || self.attributes[:subject] || ""
  begin
    title_content = MaRuKu::HTMLFragment.new(doc_title).to_html
  rescue
    title_content = xtext(doc_title)
  end
  title = xelem('title') << title_content
  head << title
  add_css_to(head)

  root << xml_newline

  body = xelem('body')

  children_to_html.each do |e|
    body << e.to_s
  end

  # render footnotes
  unless @doc.footnotes_order.empty?
    body << render_footnotes(@doc)
  end

  # When we are rendering a whole document, we add a signature
  # at the bottom.
  if get_setting(:maruku_signature)
    body << maruku_html_signature
  end

  root << body
end

#to_html_email_address ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 687

def to_html_email_address
  obfuscated = obfuscate(self.email)
  html_element('a', obfuscated, :href => "mailto:#{obfuscated}")
end

#to_html_emphasis ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 432

def to_html_emphasis
  wrap_as_element('em')
end

#to_html_entity ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 836

def to_html_entity
  entity_name = self.entity_name

  if entity = MaRuKu::Out::EntityTable.instance.entity(entity_name)
    entity_name = entity.html_num
  end

  if entity_name.kind_of? Fixnum
    # Convert numeric entities to unicode characters
    xtext([entity_name].pack('U*'))
  else
    "&#{entity_name};"
  end
end

#to_html_eqref ⇒ Object 



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# File 'lib/maruku/ext/math/to_html.rb', line 156

def to_html_eqref
  unless eq = self.doc.eqid2eq[self.eqid]
    maruku_error "Cannot find equation #{self.eqid.inspect}"
    return xtext("(eq:#{self.eqid})")
  end

  a = xelem('a')
  a['class'] = 'maruku-eqref'
  a['href'] = "#eq:#{self.eqid}"
  a << xtext("(#{eq.num})")
  a
end

#to_html_equation ⇒ Object 



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# File 'lib/maruku/ext/math/to_html.rb', line 116

def to_html_equation
  mathml = get_setting(:html_math_output_mathml) && render_mathml(:equation, self.math)
  png    = get_setting(:html_math_output_png)    && render_png(:equation, self.math)

  div = xelem('div')
  div['class'] = 'maruku-equation'
  if mathml
    if self.label  # then numerate
      span = xelem('span')
      span['class'] = 'maruku-eq-number'
      span << xtext("(#{self.num})")
      div << span
      div['id'] = "eq:#{self.label}"
    end
    mathml.add_class('maruku-mathml')
    div << mathml.to_html
  end

  if png
    img = adjust_png(png, false)
    div << img
    if self.label  # then numerate
      span = xelem('span')
      span['class'] = 'maruku-eq-number'
      span << xtext("(#{self.num})")
      div << span
      div['id'] = "eq:#{self.label}"
    end
  end

  source_span = xelem('span')
  add_class_to(source_span, 'maruku-eq-tex')
  code = convert_to_mathml_none(:equation, self.math.strip)
  code['style'] = 'display: none'
  source_span << code
  div << source_span

  div
end

#to_html_footnote_reference ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 756

def to_html_footnote_reference
  id = self.footnote_id

  # save the order of used footnotes
  order = @doc.footnotes_order

  # footnote has already been used
  return [] if order.include?(id)

  return [] unless @doc.footnotes[id]

  # take next number
  order << id

  num = order.index(id) + 1

  sup = xelem('sup')
  sup['id'] = "#{get_setting(:doc_prefix)}fnref:#{num}"
  a = xelem('a')
  a << xtext(num.to_s)
  a['href'] = "\##{get_setting(:doc_prefix)}fn:#{num}"
  a['rel'] = 'footnote'
  sup << a
end

#to_html_head_cell ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 824

def to_html_head_cell
  wrap_as_element('th')
end

#to_html_header ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 467

def to_html_header
  element_name = "h#{self.level}"
  h = wrap_as_element element_name

  if span = render_section_number
    h.children.unshift(span)
  end

  add_ws h
end

#to_html_hrule ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 311

def to_html_hrule
  xelem('hr')
end

#to_html_im_image ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 710

def to_html_im_image
  if self.url
    attrs = {}
    attrs['src'] = self.url.to_s
    attrs['alt'] = children_to_s
    attrs['title'] = self.title.to_s if self.title
    html_element('img', nil, attrs)
  else
    maruku_error "Image with no url: #{self.inspect}"
    tell_user "Could not create image without a source URL;" +
      " Using SPAN element as replacement."
    wrap_as_element('span')
  end
end

#to_html_im_link ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 662

def to_html_im_link
  if self.url
    a = {}
    a['href'] = self.url
    a['title'] = self.title if self.title
    wrap_as_element('a', a)
  else
    maruku_error "Could not find url in #{self.inspect}"
    tell_user "Not creating a link for ref_id = #{id.inspect}."
    wrap_as_element('span')
  end
end

#to_html_image ⇒ Object

Images



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# File 'lib/maruku/output/to_html.rb', line 694

def to_html_image
  a = {}
  id = self.ref_id
  if ref = @doc.refs[sanitize_ref_id(id)] || @doc.refs[sanitize_ref_id(children_to_s)]
    a['src'] = ref[:url].to_s
    a['alt'] = children_to_s
    a['title'] = ref[:title].to_s if ref[:title]
    html_element('img', nil, a)
  else
    maruku_error "Could not find id = #{id.inspect} for\n #{self.inspect}"
    tell_user "Could not create image with ref_id = #{id.inspect};" +
      " Using SPAN element as replacement."
    wrap_as_element('span')
  end
end

#to_html_immediate_link ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 636

def to_html_immediate_link
  text = self.url.gsub(/^mailto:/, '') # don't show mailto
  html_element('a', text, 'href' => self.url)
end

#to_html_inline_code ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 615

def to_html_inline_code
  code_attrs = {}
  source = xtext(self.raw_code)

  color = get_setting(:code_background_color)
  if color != MaRuKu::Globals[:code_background_color]
    code_attrs['style'] = "background-color: #{color};" + (code_attrs['style'] || "")
  end

  html_element('code', source, code_attrs)
end

#to_html_inline_math ⇒ Object 



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# File 'lib/maruku/ext/math/to_html.rb', line 99

def to_html_inline_math
  mathml = get_setting(:html_math_output_mathml) && render_mathml(:inline, self.math)
  if mathml
    mathml.add_class('maruku-mathml')
    return mathml.to_html
  end

  png = get_setting(:html_math_output_png) && render_png(:inline, self.math)

  HTMLElement.new 'span', 'class' => 'maruku-inline' do
    # TODO: It seems weird that we output an empty span if there's no PNG
    if png
      adjust_png(png, true)
    end
  end
end

#to_html_li ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 420

def to_html_li
  add_ws wrap_as_element('li')
end

#to_html_linebreak ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 315

def to_html_linebreak
  xelem('br')
end

#to_html_link ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 641

def to_html_link
  a = {}
  id = self.ref_id || children_to_s

  if ref = @doc.refs[sanitize_ref_id(id)] || @doc.refs[sanitize_ref_id(children_to_s)]
    a['href'] = ref[:url] if ref[:url]
    a['title'] = ref[:title] if ref[:title]
  else
    maruku_error "Could not find ref_id = #{id.inspect} for #{self.inspect}\n" +
      "Available refs are #{@doc.refs.keys.inspect}"
    tell_user "Not creating a link for ref_id = #{id.inspect}.\n"
    if (self.ref_id)
      return "[#{children_to_s}][#{id}]"
    else
      return "[#{children_to_s}]"
    end
  end

  wrap_as_element('a', a)
end

#to_html_ol ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 416

def to_html_ol
  add_ws wrap_as_element('ol')
end

#to_html_paragraph ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 412

def to_html_paragraph
  add_ws wrap_as_element('p')
end

#to_html_quote ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 424

def to_html_quote
  add_ws wrap_as_element('blockquote')
end

#to_html_raw_html ⇒ Object

begin maruku_doc

Attribute: filter_html Scope: document

If true, raw HTML is discarded from the output.

end



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# File 'lib/maruku/output/to_html.rb', line 733

def to_html_raw_html
  return [] if get_setting(:filter_html)
  return parsed_html.to_html if parsed_html

  # If there's no parsed HTML
  raw_html = self.raw_html

  # Creates red box with offending HTML
  tell_user "Wrapping bad html in a PRE with class 'markdown-html-error'\n" +
    raw_html.gsub(/^/, '|')
  pre = xelem('pre')
  pre['style'] = 'border: solid 3px red; background-color: pink'
  pre['class'] = 'markdown-html-error'
  pre << xtext("Maruku could not parse this XML/HTML: \n#{raw_html}")
end

#to_html_ref_definition ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 899

def to_html_ref_definition
  []
end

#to_html_strong ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 428

def to_html_strong
  wrap_as_element('strong')
end

#to_html_table ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 798

def to_html_table
  num_columns = self.align.size

  head, *rows = @children.each_slice(num_columns).to_a

  table = html_element('table')
  thead = xelem('thead')
  tr = xelem('tr')
  array_to_html(head).inject(tr, &:<<)
  thead << tr
  table << thead

  tbody = xelem('tbody')
  rows.each do |row|
    tr = xelem('tr')
    array_to_html(row).each_with_index do |x, i|
      x['style'] ="text-align: #{self.align[i].to_s};"
      tr << x
    end

    tbody << tr << xml_newline
  end

  table << tbody
end

#to_html_ul ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 403

def to_html_ul
  if @attributes[:toc]
    # render toc
    @doc.toc.to_html
  else
    add_ws wrap_as_element('ul')
  end
end

#to_html_xml_instr ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 851

def to_html_xml_instr
  target = self.target || ''
  code = self.code || ''

  # A blank target is invalid XML. Just create a text node?
  if target.empty?
    xtext("<?#{code}?>")
  else
    "<?#{target} #{code}?>"
  end
end

#to_latex_ref_definition ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 903

def to_latex_ref_definition
  []
end

#wrap_as_element(name, attributes = {}) ⇒ Object

renders children as html and wraps into an element of given name

Sets ‘id’ if meta is set



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# File 'lib/maruku/output/to_html.rb', line 322

def wrap_as_element(name, attributes={})
  html_element name, children_to_html, attributes
end

#xelem(type) ⇒ Object

Helper to create an element



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# File 'lib/maruku/output/to_html.rb', line 95

def xelem(type)
  HTMLElement.new(type)
end

#xml_newline ⇒ Object 



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# File 'lib/maruku/output/to_html.rb', line 99

def xml_newline
  "\n"
end

#xtext(text) ⇒ Object

Helper to create a text node



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# File 'lib/maruku/output/to_html.rb', line 90

def xtext(text)
  CGI.escapeHTML(text)
end