Class: Formatter::Delimited

Inherits:
Object show all
Defined in:
lib/livetext/formatter.rb

Direct Known Subclasses

Bracketed, Double, Single

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(str, marker, tag) ⇒ Delimited

Returns a new instance of Delimited.



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# File 'lib/livetext/formatter.rb', line 20

def initialize(str, marker, tag)
  @str, @marker, @tag = str.dup, marker, tag
  @buffer = ""
  @cdata  = ""
  @state  = :INITIAL
end

Class Method Details

.process(str) ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 174

def self.process(str)
  bold = self.new(str, "*", "b")
  sb   = bold.handle
# return sb
  ital = self.new(sb, "_", "i")
  si   = ital.handle
  code = self.new(si, "`", "tt")
  sc   = code.handle
  stri = self.new(sc, "~", "strike")
  si   = stri.handle
  si
end

Instance Method Details

#buffer ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 113

def buffer
  status("** buffer 0")
  @buffer << grab
  @state = :LOOPING
end

#cdata ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 119

def cdata
  status("** cdata 0")
  case
  when eol?
    status("** cdata 1")
    if @cdata.empty?
      status("** cdata 2")
      @buffer << @marker unless @marker[1] == "["
    else
      status("** cdata 3")
      @buffer << wrap(@cdata)
    end
    @state = :FINAL
  when terminated?
    status("** cdata 4")
    @buffer << wrap(@cdata)
    grab_terminator    # "*a *b"  case???
    @cdata = ""
    @state = :LOOPING
  else
    status("** cdata 5")
    @cdata << grab
    @state = :CDATA
  end
end

#eol? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/livetext/formatter.rb', line 51

def eol?
  @str.empty?
end

#escape? ⇒ Boolean

Returns:

  • (Boolean) 


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

def escape?
  front == "\\"
end

#front ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 34

def front
  @str[0]
end

#grab(n = 1) ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 38

def grab(n=1)
  char = @str.slice!(0..(n-1))   # grab n chars
  char
end

#grab_terminator ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 43

def grab_terminator
  status("** grabterm 0")
  @state = :LOOPING
  # goes onto buffer by default
  # Don't? what if searching for space_marker?
  # @buffer << grab  
end

#handle ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 165

def handle
  loop do
    break if @state == :FINAL
    meth = @state.downcase
    send(meth)
  end
  return @buffer
end

#initial ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 85

def initial
  status("** init 0")
  n = @marker.length
  case
  when escape?
    status("** esc i0")
    grab               # backslash
    status("** esc i1")
    @buffer << grab    # char
    status("** esc i2")
  when space_marker?
    status("** init 1")
    @buffer << grab   # append the space
    grab(n)           # eat the marker
    @state = :CDATA
  when marker?
    status("** init 2")
    grab(n)  # Eat the marker
    @state = :CDATA
  when eol?
    status("** init 3")
    @state = :FINAL
  else
    status("** init 4")
    @state = :BUFFER
  end
end

#looping ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 145

def looping
  n = @marker.length
  case
  when escape?
    status("** esc l0")
    grab               # backslash
    status("** esc l1")
    @buffer << grab    # char
    status("** esc l2")
  when space_marker?
    @buffer << grab   # append the space
    grab(n)           # eat the marker
    @state = :CDATA
  when eol?
    @state = :FINAL
  else   # includes marker not preceded by space!
    @buffer << grab
  end
end

#marker? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/livetext/formatter.rb', line 67

def marker?
  @str.start_with?(@marker)
end

#space? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/livetext/formatter.rb', line 55

def space?
  front == " "
end

#space_marker? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/livetext/formatter.rb', line 71

def space_marker?
  @str.start_with?(" " + @marker)
end

#status(where) ⇒ Object 



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

def status(where)
  if $debug
    STDERR.printf "%-11s %-7s #{@marker.inspect} \n #{' '*11} state = %-8s  str = %-20s  buffer = %-20s  cdata = %-20s\n", 
      where, self.class, @state, @str.inspect, @buffer.inspect, @cdata.inspect
  end
end

#terminated? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/livetext/formatter.rb', line 63

def terminated?
  space?   # Will be overridden except in Single
end

#wrap(text) ⇒ Object 



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# File 'lib/livetext/formatter.rb', line 75

def wrap(text)
  status("** wrap 0")
  if text.empty?
    result = @marker
    result = "" if @marker[1] == "["
    return result
  end
  "<#{@tag}>#{text}</#{@tag}>"
end