Module: Formatter

Defined in:
lib/livetext/formatter.rb

Constant Summary collapse

Start = 
/(?<start>(^| ))/
Stop = 
/(?<stop> |$)/

Class Method Summary collapse

Class Method Details

.bracket(str, char, tag) ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 35

def self.bracket(str, char, tag)
  cdata = /(?<cdata>[^\]]*)\]/
  stop  = /(?<stop> |$)/
  sigil = Regexp.escape(char + "[")
  rx = make_regex(sigil, cdata, stop)
  str = iterate(str, rx, tag)
  str
end

.double(str, char, tag) ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 18

def self.double(str, char, tag)
  cdata = /(?<cdata>[^ \.,]*?)/
  stop  = /(?<stop>[\.,]|$)/
  sigil = Regexp.escape(char+char)
  rx = make_regex(sigil, cdata, stop)
  str = iterate(str, rx, tag)
  str
end

.format(str) ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 59

def self.format(str)
  s2 = str.chomp
  s2 = handle(s2, "*", "b")
  s2 = handle(s2, "_", "i")
  s2 = handle(s2, "`", "tt")
  s2 = handle(s2, "~", "strike")
  s2
end

.handle(str, char, tag) ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 52

def self.handle(str, char, tag)
  s2 = double(str, char, tag)  # in this order...
  s2 = single(s2, char, tag)
  s2 = bracket(s2, char, tag)
  s2
end

.iterate(str, rx, tag) ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 10

def self.iterate(str, rx, tag)
  loop do
    str, more = make_string(str, rx, tag)
    break unless more
  end
  str
end

.make_regex(sigil, cdata, stop = Stop) ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 6

def self.make_regex(sigil, cdata, stop = Stop)
  rx = /#{Start}#{sigil}#{cdata}#{stop}/
end

.make_string(str, rx, tag) ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 44

def self.make_string(str, rx, tag)
  md = rx.match(str)
  return [str, false] if md.nil?
  start, cdata, stop = md.values_at(:start, :cdata, :stop)
  str = str.sub(rx, start + "<#{tag}>" + cdata + "<\/#{tag}>" + stop)
  [str, true]
end

.single(str, char, tag) ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 27

def self.single(str, char, tag)
  cdata = /((?<cdata>[^$ \[\*][^ ]*))/
  sigil = Regexp.escape(char)
  rx = make_regex(sigil, cdata)
  str = iterate(str, rx, tag)
  str
end