module EventMachine::Protocols::LineText2

def receive_binary_data data

Stub. Should be subclassed by user code. 
def receive_binary_data data
  # no-op
end

def receive_data data


handling characteristics on a per-token basis.
That way the user-defined handlers we call can modify the
Will loop internally until there's no data left to read.
-- 
def receive_data data
  return unless (data and data.length > 0)
  # Do this stuff in lieu of a constructor.
  @lt2_mode ||= :lines
  @lt2_delimiter ||= "\n"
  @lt2_linebuffer ||= []
  remaining_data = data
  while remaining_data.length > 0
    if @lt2_mode == :lines
      delimiter_string = case @lt2_delimiter
      when Regexp
        remaining_data.slice(@lt2_delimiter)
      else
        @lt2_delimiter
      end
      ix = remaining_data.index(delimiter_string) if delimiter_string
      if ix
        @lt2_linebuffer << remaining_data[0...ix]
        ln = @lt2_linebuffer.join
        @lt2_linebuffer.clear
        if @lt2_delimiter == "\n"
          ln.chomp!
        end
        receive_line ln
        remaining_data = remaining_data[(ix+delimiter_string.length)..-1]
      else
        @lt2_linebuffer << remaining_data
        remaining_data = ""
      end
    elsif @lt2_mode == :text
      if @lt2_textsize
        needed = @lt2_textsize - @lt2_textpos
        will_take = if remaining_data.length > needed
                      needed
                    else
                      remaining_data.length
                    end
        @lt2_textbuffer << remaining_data[0...will_take]
        tail = remaining_data[will_take..-1]
        @lt2_textpos += will_take
        if @lt2_textpos >= @lt2_textsize
          # Reset line mode (the default behavior) BEFORE calling the
          # receive_binary_data. This makes it possible for user code
          # to call set_text_mode, enabling chains of text blocks
          # (which can possibly be of different sizes).
          set_line_mode
          receive_binary_data @lt2_textbuffer.join
          receive_end_of_binary_data
        end
        remaining_data = tail
      else
        receive_binary_data remaining_data
        remaining_data = ""
      end
    end
  end
end

def receive_end_of_binary_data

to keep track of how much data it's received.
back to line mode. Useful when client code doesn't want
This is called when transitioning internally from text mode
Stub. Should be subclassed by user code. 
def receive_end_of_binary_data
  # no-op
end

def receive_line ln

Stub. Should be subclassed by user code. 
def receive_line ln
  # no-op
end

def set_binary_mode size=nil

Alias for #set_text_mode, added for back-compatibility with LineAndTextProtocol. 
def set_binary_mode size=nil
  set_text_mode size
end

def set_delimiter delim

converted to a string.
passed to set_delimiter other than a regular expression will be
The line delimiter may be a regular expression or a string. Anything 
def set_delimiter delim
  @lt2_delimiter = case delim
  when Regexp
    delim
  else
    delim.to_s
  end
end

def set_line_mode data=""

entirely.
be an umprocessed chunk of the transmitted binary data, or something else
We support an optional parameter to "throw back" some data, which might
processing of binary data creates a need to transition back to line mode.
Called internally but also exposed to user code, for the case in which 
def set_line_mode data=""
  @lt2_mode = :lines
  (@lt2_linebuffer ||= []).clear
  receive_data data.to_s
end

def set_text_mode size=nil 

def set_text_mode size=nil
  if size == 0
    set_line_mode
  else
    @lt2_mode = :text
    (@lt2_textbuffer ||= []).clear
    @lt2_textsize = size # which can be nil, signifying no limit
    @lt2_textpos = 0
  end
end

def unbind

be aware that they may get a short buffer.
when in sized text mode. User overrides of #receive_binary_data need to
In case of a dropped connection, we'll send a partial buffer to user code 
def unbind
  @lt2_mode ||= nil
  if @lt2_mode == :text and @lt2_textpos > 0
    receive_binary_data @lt2_textbuffer.join
  end
end