Module: MaRuKu::In::Markdown::SpanLevelParser

Includes:
Helpers
Included in:
BlockLevelParser, MDDocument
Defined in:
lib/maruku.rb,
lib/maruku/attributes.rb,
lib/maruku/input/rubypants.rb,
lib/maruku/input/charsource.rb,
lib/maruku/input/parse_span.rb,
lib/maruku/input/html_helper.rb

Defined Under Namespace

Classes: CaptureRule, CharSourceDebug, CharSourceManual, CharSourceStrscan, HTMLHelper, ReplaceRule, Rule, SpanContext

Constant Summary collapse

Punct_class = 
'[!"#\$\%\'()*+,\-.\/:;<=>?\@\[\\\\\]\^_`{|}~]'
Close_class = 
"[^\ \t\r\n\\[\{\(\-]"
Rules =

All the rules that will be applied (in order) to smarten the document.

[
   ['---',   :mdash          ],
   ['--',    :ndash          ],
   ['...',   :hellip         ],
   ['. . .', :hellip         ],
   ["``",    :ldquo          ],
   ["''",    :rdquo          ],
   [/<<\s/,  [:laquo, :nbsp] ],
   [/\s>>/,  [:nbsp, :raquo] ],
   ['<<',    :laquo          ],
   ['>>',    :raquo          ],

   # Special case if the very first character is a quote followed by
   # punctuation at a non-word-break. Close the quotes by brute
   # force:
   [/\A'(?=#{Punct_class}\B)/, :rsquo],
   [/\A"(?=#{Punct_class}\B)/, :rdquo],
   # Special case for double sets of quotes, e.g.:
   #   <p>He said, "'Quoted' words in a larger quote."</p>
   [/"'(?=\w)/, [:ldquo, :lsquo]    ],
   [/'"(?=\w)/, [:lsquo, :ldquo]    ],
   # Special case for decade abbreviations (the '80s):
   [/'(?=\d\ds)/, :rsquo            ],
   # Get most opening single quotes:
   [/(\s)'(?=\w)/, [:one, :lsquo]   ],
   # Single closing quotes:
   [/(#{Close_class})'/, [:one, :rsquo]],
   [/'(\s|s\b|$)/, [:rsquo, :one]],
   # Any remaining single quotes should be opening ones:
   ["'", :lsquo],
   # Get most opening double quotes:
   [/(\s)"(?=\w)/, [:one, :ldquo]],
   # Double closing quotes:
   [/(#{Close_class})"/, [:one, :rdquo]],
   [/"(\s|s\b|$)/, [:rdquo, :one]],
   # Any remaining quotes should be opening ones:
   ['"', :ldquo]
  ].
map do |reg, subst| # People should do the thinking, machines should do the work.
  captures = false
  subst = Array(subst).map do |s|
    if s == :one
      captures = true
      s
    else
      MaRuKu::MDElement.new(:entity, [], { :entity_name => s.to_s.freeze }, nil)
    end
  end.freeze

  if captures
    CaptureRule.new reg, subst
  else
    ReplaceRule.new reg, subst
  end
end
CharSource =

Choose!

CharSourceManual
EscapedCharInText = 
'\\`*_{}[]()#.!|:+->'.split(//)
EscapedCharInQuotes = 
EscapedCharInText + ["'", '"']
EscapedCharInInlineCode = 
['\\', '`']





Instance Method Summary
collapse




Methods included from Helpers


#md_abbr, #md_abbr_def, #md_ald, #md_br, #md_code, #md_codeblock, #md_el, #md_em, #md_email, #md_emstrong, #md_entity, #md_foot_ref, #md_footnote, #md_header, #md_hrule, #md_html, #md_ial, #md_im_image, #md_im_link, #md_image, #md_li, #md_link, #md_par, #md_quote, #md_ref_def, #md_strong, #md_url, #md_xml_instr




Instance Method Details





#apply_one_rule!(rule, input) ⇒ Object







Fully apply a single rule to an entire array of elements. note: input will be modified in place















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# File 'lib/maruku/input/rubypants.rb', line 278

def apply_one_rule!(rule, input)
  output = []
  while first = input.shift
    if first.kind_of?(String)
      rule.doc = @doc
      rule.apply(first, input, output)
    else
      output << first
    end
  end
  output
end












#educate(elements) ⇒ Object







Transform elements to have SmartyPants punctuation.















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# File 'lib/maruku/input/rubypants.rb', line 292

def educate(elements)
  Rules.inject(elements) do |elems, rule|
    apply_one_rule!(rule, elems)
  end
end












#extension_meta(src, con, break_on_chars = nil) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 270

def extension_meta(src, con, break_on_chars=nil)
  if m = src.read_regexp(/([^\s\:\"\'}]+?):/)
    name = m[1]
    al = read_attribute_list(src, con, break_on_chars)
    self.doc.ald[name] = al
    con.push md_ald(name, al)
  else
    al = read_attribute_list(src, con, break_on_chars)
    con.push md_ial(al)
  end
end












#interpret_extension(src, con, break_on_chars = nil) ⇒ Object







Start: cursor on character after ‘End: curson on ‘’ or EOF















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# File 'lib/maruku/input/parse_span.rb', line 249

def interpret_extension(src, con, break_on_chars=nil)
  case src.cur_char
  when ':'
    src.ignore_char # :
    extension_meta(src, con, break_on_chars)
  when '#', '.'
    extension_meta(src, con, break_on_chars)
  else
    stuff = read_simple(src, '}', break_on_chars)
    if stuff =~ /^(\w+\s|[^\w])/
      extension_id = $1.strip

      maruku_recover "I don't know what to do with extension '#{extension_id}'\n" +
        "I will treat this:\n\t{#{stuff}} \n as meta-data.\n", src, con
    else
      maruku_recover "I will treat this:\n\t{#{stuff}} \n as meta-data.\n", src, con
    end
    extension_meta(src, con, break_on_chars)
  end
end












#md_al(s = []) ⇒ Object










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# File 'lib/maruku/attributes.rb', line 28

def md_al(s = [])
  AttributeList.new(s)
end












#merge_ial(elements, src, con) ⇒ Object










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# File 'lib/maruku/attributes.rb', line 91

def merge_ial(elements, src, con)
  # Apply each IAL to the element before
  (elements + [nil]).each_cons(3) do |before, e, after|
    next unless ial?(e)

    if before.kind_of? MDElement
      before.al = e.ial
    elsif after.kind_of? MDElement
      after.al = e.ial
    else
      maruku_error <<ERR, src, con
It's unclear which element the attribute list {:#{e.ial.to_s}}
is referring to. The element before is a #{before.class},
the element after is a #{after.class}.
  before: #{before.inspect}
  after: #{after.inspect}
ERR
    end
  end

  unless Globals[:debug_keep_ials]
    elements.delete_if {|x| ial?(x) && x != elements.first}
  end
end












#parse_span(string, parent = nil) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 11

def parse_span(string, parent=nil)
  string = Array(string).join("\n") unless string.kind_of? String
  src = MaRuKu::In::Markdown::SpanLevelParser::CharSource.new(string, parent)
  read_span(src, EscapedCharInText, [nil])
end












#read_attribute_list(src, con = nil, break_on_chars = nil) ⇒ AttributeList?













Returns:










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# File 'lib/maruku/attributes.rb', line 33

def read_attribute_list(src, con=nil, break_on_chars=nil)
  break_on_chars = Array(break_on_chars)
  separators = break_on_chars + ['=', ' ', "\t"]
  escaped = Maruku::EscapedCharInQuotes

  al = AttributeList.new
  loop do
    src.consume_whitespace
    break if break_on_chars.include? src.cur_char

    case src.cur_char
    when ':'
      src.ignore_char
    when nil
      break      # we're done here.
    when '='     # error
      src.ignore_char
      maruku_error "In attribute lists, cannot start identifier with `=`."
      tell_user "Ignoring and continuing."
    when '#'     # id definition
      src.ignore_char
      if id = read_quoted_or_unquoted(src, con, escaped, separators)
        al << [:id, id]
      else
        maruku_error 'Could not read `id` attribute.', src, con
        tell_user 'Ignoring bad `id` attribute.'
      end
    when '.'     # class definition
      src.ignore_char
      if klass = read_quoted_or_unquoted(src, con, escaped, separators)
        al << [:class, klass]
      else
        maruku_error 'Could not read `class` attribute.', src, con
        tell_user 'Ignoring bad `class` attribute.'
      end
    else
      unless key = read_quoted_or_unquoted(src, con, escaped, separators)
        maruku_error 'Could not read key or reference.'
        next
      end

      if src.cur_char != '=' && key.length > 0
        al << [:ref, key]
        next
      end

      src.ignore_char # skip the =
      if val = read_quoted_or_unquoted(src, con, escaped, separators)
        al << [key, val]
      else
        maruku_error "Could not read value for key #{key.inspect}.", src, con
        tell_user "Ignoring key #{key.inspect}"
      end
    end
  end
  al
end












#read_em(src, delim) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 378

def read_em(src, delim)
  src.ignore_char
  children = read_span(src, EscapedCharInText, nil, delim)
  src.ignore_char
  md_em(children)
end












#read_email_el(src, con) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 290

def read_email_el(src,con)
  src.ignore_char # leading <
  mail = read_simple(src, nil, '>')
  src.ignore_char # closing >

  address = mail.gsub(/^mailto:/, '')
  con.push_element md_email(address)
end












#read_emstrong(src, delim) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 392

def read_emstrong(src, delim)
  src.ignore_chars(3)
  children = read_span(src, EscapedCharInText, nil, delim)
  src.ignore_chars(3)
  md_emstrong(children)
end












#read_footnote_ref(src, con) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 409

def read_footnote_ref(src,con)
  ref = read_ref_id(src,con)
  con.push_element md_foot_ref(ref)
end












#read_image(src, con) ⇒ Object







read link















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# File 'lib/maruku/input/parse_span.rb', line 542

def read_image(src, con)
  src.ignore_chars(2) # opening "!["
  alt_text = read_span(src, EscapedCharInText, ']')
  src.ignore_char # closing bracket
  # ignore space
  if src.cur_char == ' ' && ['[', '('].include?(src.next_char)
    src.ignore_char
  end
  case src.cur_char
  when '('
    src.ignore_char # opening (
    src.consume_whitespace
    url = read_url(src, [' ', "\t", ')'])
    unless url
      maruku_error "Could not read url from #{src.cur_chars(10).inspect}", src, con
    end
    src.consume_whitespace
    title = nil
    if src.cur_char != ')' # we have a title
      quote_char = src.cur_char
      title = read_quoted(src, con)
      if !title
        maruku_error 'Must quote title', src, con
      else
        # Tries to read a title with quotes: ![a](url "ti"tle")
        # this is the most ugly thing in Markdown
        if !src.next_matches(/\s*\)/)
          # if there is not a closing par ), then read
          # the rest and guess it's title with quotes
          rest = read_simple(src, nil, ')', nil)
          # chop the closing char
          rest.chop!
          title << quote_char << rest
        end
      end
    end
    src.consume_whitespace
    closing = src.shift_char # closing )
    if closing != ')'
      maruku_error "Unclosed link: '#{closing}'" +
        " Read url=#{url.inspect} title=#{title.inspect}", src, con
    end
    con.push_element md_im_image(alt_text, url, title)
  when '[' # link ref
    ref_id = read_ref_id(src, con)
    if !ref_id # TODO: check around
      maruku_error 'Reference not closed.', src, con
      ref_id = ""
    end

    con.push_element md_image(alt_text, ref_id)
  else # no stuff
    ref_id = alt_text.join
    con.push_element md_image(alt_text, ref_id)
  end
end












#read_inline_code(src, con) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 440

def read_inline_code(src, con)
  # Count the number of ticks
  num_ticks = 0
  while src.cur_char == '`'
    num_ticks += 1
    src.ignore_char
  end
  # We will read until this string
  end_string = "`" * num_ticks

  code = read_simple(src, nil, nil, end_string)

  # We didn't find a closing batch!
  if !code || src.cur_char != '`'
    con.push_element(end_string + (code || '')) and return
  end

  # We didn't find a closing batch!
  if !code || src.cur_char != '`'
    con.push_element(end_string + (code || ''))
    return
  end

  #   puts "Now I expects #{num_ticks} ticks: #{src.cur_chars(10).inspect}"
  src.ignore_chars num_ticks

  # Ignore at most one space
  if num_ticks > 1 && code[0, 1] == ' '
    code = code[1..-1]
  end

  # drop last space
  if num_ticks > 1 && code[-1, 1] == ' '
    code = code[0..-2]
  end

  #   puts "Read `` code: #{code.inspect}; after: #{src.cur_chars(10).inspect} "
  con.push_element md_code(code)
end












#read_inline_html(src, con) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 414

def read_inline_html(src, con)
  h = HTMLHelper.new
  begin
    # This is our current buffer in the context
    next_stuff = src.current_remaining_buffer

    consumed = 0
    while true
      if consumed >= next_stuff.size
        maruku_error "Malformed HTML starting at #{next_stuff.inspect}", src, con
        break
      end

      h.eat_this next_stuff[consumed].chr
      consumed += 1
      break if h.is_finished?
    end
    src.ignore_chars(consumed)
    con.push_element md_html(h.stuff_you_read)
  rescue => e
    maruku_error "Bad html: \n" +
      e.inspect.gsub(/^/, '>'), src, con, "I will try to continue after bad HTML."
    con.push_char src.shift_char
  end
end












#read_link(src, con) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 480

def read_link(src, con)
  # we read the string and see what happens
  src.ignore_char # opening bracket
  children = read_span(src, EscapedCharInText, ']')
  src.ignore_char # closing bracket

  # ignore space
  if src.cur_char == ' ' && ['[', '('].include?(src.next_char)
    src.shift_char
  end

  case src.cur_char
  when '('
    src.ignore_char # opening (
    src.consume_whitespace
    url = read_url(src, [' ', "\t", ")"]) || ''

    src.consume_whitespace
    title = nil
    if src.cur_char != ')' # we have a title
      quote_char = src.cur_char
      title = read_quoted(src, con)

      if not title
        maruku_error 'Must quote title', src, con
      else
        # Tries to read a title with quotes: ![a](url "ti"tle")
        # this is the most ugly thing in Markdown
        unless src.next_matches(/\s*\)/)
          # if there is not a closing par ), then read
          # the rest and guess it's title with quotes
          rest = read_simple(src, nil, ')', nil)
          # chop the closing char
          rest.chop!
          title << quote_char << rest
        end
      end
    end
    src.consume_whitespace
    closing = src.shift_char # closing )
    if closing != ')'
      maruku_error 'Unclosed link', src, con, "No closing ): I will not create" +
        " the link for #{children.inspect}"
      con.push_elements children
      return
    end
    con.push_element md_im_link(children, url, title)
  when '[' # link ref
    ref_id = read_ref_id(src, con)
    if ref_id
      con.push_element md_link(children, ref_id)
    else
      maruku_error "Could not read ref_id", src, con, "I will not create the link for " +
        "#{children.inspect}"
      con.push_elements children
      return
    end
  else # empty [link]
    con.push_element md_link(children, nil)
  end
end












#read_quoted(src, con) ⇒ Object







Tries to read a quoted value. If stream does not start with ‘ or “, returns nil.















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# File 'lib/maruku/input/parse_span.rb', line 326

def read_quoted(src, con)
  case src.cur_char
  when "'", '"'
    quote_char = src.shift_char # opening quote
    string = read_simple(src, EscapedCharInQuotes, quote_char)
    src.ignore_char # closing quote
    string
  else
    nil
  end
end












#read_quoted_or_unquoted(src, con, escaped, exit_on_chars) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 315

def read_quoted_or_unquoted(src, con, escaped, exit_on_chars)
  case src.cur_char
  when "'", '"'
    read_quoted(src, con)
  else
    read_simple(src, escaped, exit_on_chars, nil, false)
  end
end












#read_ref_id(src, con) ⇒ Object







Reads a bracketed id “[refid]”. Consumes also both brackets.















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# File 'lib/maruku/input/parse_span.rb', line 400

def read_ref_id(src, con)
  src.ignore_char # [
  if m = src.read_regexp(/([^\]]*?)\]/)
    m[1]
  else
    nil
  end
end












#read_simple(src, escaped, exit_on_chars = nil, exit_on_strings = nil, warn = true) ⇒ Object







Reads a simple string (no formatting) until one of break_on_chars, while escaping the escaped. If the string is empty, it returns nil. By default, raises on error if the string terminates unexpectedly. This can be by setting the last argument to false.















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# File 'lib/maruku/input/parse_span.rb', line 343

def read_simple(src, escaped, exit_on_chars=nil, exit_on_strings=nil, warn=true)
  text = ""
  escaped = Array(escaped)
  exit_on_chars = Array(exit_on_chars)
  exit_on_strings = Array(exit_on_strings)
  while true
    c = src.cur_char

    break if exit_on_chars.include?(c)
    break if exit_on_strings.any? {|x| src.cur_chars_are x }

    case c
    when nil
      if warn
        maruku_error "String finished while reading (break on " +
          "#{exit_on_chars.inspect})" +
          " already read: #{text.inspect}", src
      end
      break
    when "\\"
      d = src.next_char
      if escaped.include? d
        src.ignore_chars(2)
        text << d
      else
        text << src.shift_char
      end
    else
      text << src.shift_char
    end
  end

  text.empty? ? nil : text
end












#read_span(src, escaped, exit_on_chars = nil, exit_on_strings = nil) ⇒ Object







This is the main loop for reading span elements


It’s long, but not complex or difficult to understand.















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# File 'lib/maruku/input/parse_span.rb', line 22

def read_span(src, escaped, exit_on_chars=nil, exit_on_strings=nil)
  escaped = Array(escaped)
  con = SpanContext.new
  c = d = nil
  while true
    c = src.cur_char

    # This is only an optimization which cuts 50% of the time used.
    # (but you can't use a-zA-z in exit_on_chars)
    if c && c =~ /a-zA-Z0-9/
      con.push_char src.shift_char
      next
    end

    break if Array(exit_on_chars).include?(c)
    if Array(exit_on_strings).any? {|x| src.cur_chars_are x }
      # Special case: bold nested in italic
      break unless !(['*', '_'] & Array(exit_on_strings)).empty? &&
        ['**', '__'].include?(src.cur_chars(2)) &&
        !['***', '___'].include?(src.cur_chars(3))
    end

    # check if there are extensions
    next if check_span_extensions(src, con)

    case c = src.cur_char
    when ' '
      if src.cur_chars_are "  \n"
        src.ignore_chars(3)
        con.push_element md_br
        next
      else
        src.ignore_char
        con.push_space
      end
    when "\n", "\t"
      src.ignore_char
      con.push_space
    when '`'
      read_inline_code(src, con)
    when '<'
      # It could be:
      # 1) HTML "<div ..."
      # 2) HTML "<!-- ..."
      # 3) url "<http:// ", "<ftp:// ..."
      # 4) email "<andrea@... ", "<mailto:andrea@..."
      # 5) on itself! "a < b  "
      # 6) Start of <<guillemettes>>

      case d = src.next_char
      when '<'  # guillemettes
        src.ignore_chars(2)
        con.push_char '<'
        con.push_char '<'
      when '!'
        if src.cur_chars_are '<!--'
          read_inline_html(src, con)
        else
          con.push_char src.shift_char
        end
      when '?'
        read_xml_instr_span(src, con)
      when ' ', "\t"
        con.push_char src.shift_char
      else
        if src.next_matches(/<mailto:/) ||
            src.next_matches(/<[\w\.]+\@/)
          read_email_el(src, con)
        elsif src.next_matches(/<\w+:/)
          read_url_el(src, con)
        elsif src.next_matches(/<\w/)
          #puts "This is HTML: #{src.cur_chars(20)}"
          read_inline_html(src, con)
        else
          #puts "This is NOT HTML: #{src.cur_chars(20)}"
          con.push_char src.shift_char
        end
      end
    when "\\"
      d = src.next_char
      if d == "'"
        src.ignore_chars(2)
        con.push_element md_entity('apos')
      elsif d == '"'
        src.ignore_chars(2)
        con.push_element md_entity('quot')
      elsif escaped.include? d
        src.ignore_chars(2)
        con.push_char d
      else
        con.push_char src.shift_char
      end
    when '['
      if markdown_extra? && src.next_char == '^'
        read_footnote_ref(src,con)
      elsif IgnoreWikiLinks && src.next_char == '['
        con.push_char src.shift_char
        con.push_char src.shift_char
      else
        read_link(src, con)
      end
    when '!'
      if src.next_char == '['
        read_image(src, con)
      else
        con.push_char src.shift_char
      end
    when '&'
      # named references
      if m = src.read_regexp(/\&(\w+);/)
        con.push_element md_entity(m[1])
        # numeric
      elsif m = src.read_regexp(/\&\#(x)?(\w+);/)
        num = m[1] ? m[2].hex : m[2].to_i
        con.push_element md_entity(num)
      else
        con.push_char src.shift_char
      end
    when '*'
      if !src.next_char
        maruku_error "Opening * as last char.", src, con, 'Treating as literal'
        con.push_char src.shift_char
      else
        follows = src.cur_chars(4)
        if follows =~ /^\*\*\*[^\s\*]/
          con.push_element read_emstrong(src, '***')
        elsif follows  =~ /^\*\*[^\s\*]/
          con.push_element read_strong(src, '**')
        elsif follows =~ /^\*[^\s\*]/
          con.push_element read_em(src, '*')
        else # * is just a normal char
          con.push_char src.shift_char
        end
      end
    when '_'
      if !src.next_char
        maruku_error "Opening _ as last char", src, con, 'Treating as literal'
        con.push_char src.shift_char
      else
        # we don't want "mod_ruby" to start an emphasis
        # so we start one only if
        # 1) there's nothing else in the span (first char)
        # or 2) the last char was a space
        # or 3) the current string is empty
        #if con.elements.empty? ||
        if con.is_end?
          # also, we check the next characters
          follows = src.cur_chars(4)
          if  follows =~ /^\_\_\_[^\s\_]/
            con.push_element read_emstrong(src, '___')
          elsif follows  =~ /^\_\_[^\s\_]/
            con.push_element read_strong(src, '__')
          elsif follows =~ /^\_[^\s\_]/
            con.push_element read_em(src, '_')
          else # _ is just a normal char
            con.push_char src.shift_char
          end
        else
          # _ is just a normal char
          con.push_char src.shift_char
        end
      end
    when '{' # extension
      if ['#', '.', ':'].include? src.next_char
        src.ignore_char # {
        interpret_extension(src, con, '}')
        src.ignore_char # }
      else
        con.push_char src.shift_char
      end
    when nil
      maruku_error( ("Unclosed span (waiting for %s" +
                     "#{exit_on_strings.inspect})") %
                    [ exit_on_chars ? "#{exit_on_chars.inspect} or" : "" ],
                    src, con)
      break
    else # normal text
      con.push_char src.shift_char
    end # end case
  end # end while true

  con.push_string_if_present

  # Assign IAL to elements
  merge_ial(con.elements, src, con)

  # Remove leading space
  if (s = con.elements.first).kind_of? String
    if s[0, 1] == ' '
      con.elements[0] = s[1..-1]
    end
    con.elements.shift if s.empty?
  end

  # Remove final spaces
  if (s = con.elements.last).kind_of? String
    s.chop! if s[-1, 1] == ' '
    con.elements.pop if s.empty?
  end

  educate(con.elements)
end












#read_strong(src, delim) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 385

def read_strong(src, delim)
  src.ignore_chars(2)
  children = read_span(src, EscapedCharInText, nil, delim)
  src.ignore_chars(2)
  md_strong(children)
end












#read_url(src, break_on) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 299

def read_url(src, break_on)
  if ["'", '"'].include? src.cur_char
    maruku_error 'Invalid char for url', src
  end

  url = read_simple(src, nil, break_on) || ''

  if url[0, 1] == '<' && url[-1, 1] == '>'
    url = url[1, url.size-2]
  end

  return nil if url.empty?
  url
end












#read_url_el(src, con) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 282

def read_url_el(src,con)
  src.ignore_char # leading <
  url = read_simple(src, nil, '>')
  src.ignore_char # closing >

  con.push_element md_url(url)
end












#read_xml_instr_span(src, con) ⇒ Object










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# File 'lib/maruku/input/parse_span.rb', line 226

def read_xml_instr_span(src, con)
  src.ignore_chars(2) # starting <?

  # read target <?target code... ?>
  target = if m = src.read_regexp(/^(\w+)/)
             m[1]
           else
             # XML instructions are invalid without a target
             ''
           end

  delim = "?>"

  code = read_simple(src, nil, nil, delim)

  src.ignore_chars delim.size

  code = (code || "").strip
  con.push_element md_xml_instr(target, code)
end