Class: AnsiParser

Inherits:
Object show all
Defined in:
lib/rbcurse/core/util/ansiparser.rb

Overview

—————————————————————————– #

       File: colorparser.rb
Description: Default parse for our tmux format
             The aim is to be able to specify parsers so different kinds
             of formatting or documents can be used, such as ANSI formatted
             manpages.
     Author: rkumar http://github.com/rkumar/rbcurse/
       Date: 07.11.11 - 13:17
    License: Same as Ruby's License (http://www.ruby-lang.org/LICENSE.txt)
Last update: 2013-03-21 00:44

—————————————————————————– #

TODO

- perhaps we can compile the regexp once and reuse

Instance Method Summary collapse

Instance Method Details

#parse_format(s) ⇒ nil

NOTE: Experimental and minimal parses the formatted string and yields either an array of color, bgcolor and attrib or the text. This will be called by convert_to_chunk.

Currently, assumes colors and attributes are correct. No error checking or fancy stuff.

s="#[fg=green]hello there#[fg=yellow, bg=black, dim]"

Returns:

  • (nil) —

    knows nothign about output format.

Since:

  • 1.4.1 2011-11-3 experimental, can change



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# File 'lib/rbcurse/core/util/ansiparser.rb', line 27

def parse_format s  # yields attribs or text
  ## set default colors
  color   = :white
  bgcolor = :black
  attrib  = FFI::NCurses::A_NORMAL
  text    = ""

  ## split #[...]
  #a       = s.split /(#\[[^\]]*\])/
  a       = s.split /(\x1b\[\d*(?:;\d+)*?[a-zA-Z])/
  a.each { |e| 
    ## process color or attrib portion
    #[ "", "\e[1m", "", "\e[34m", "", "\e[47m", "Showing all items...", "\e[0m", "", "\e[0m", "\n"]
    if e[0,1] == "\x1b" && e[-1,1] == "m"

      #e.each { |f|  x=/^.\[(.*).$/.match(f) 
        $log.debug "XXX: ANSI e #{e} "
        x=/^.\[(.*).$/.match(e) 
        color, bgcolor, attrib = nil, nil, nil
        $log.debug "XXX: ANSI #{x} ..... #{x[1]}  "
        args = x[1].split ';'
        ## first split on commas to separate fg, bg and attr
        # http://ascii-table.com/ansi-escape-sequences.php
        args.each { |att|  
          $log.debug "XXX: ANSI att: #{att}   "
          case att.to_i
          when 0
            color, bgcolor, attrib = nil, nil, nil
            yield :reset # actually this resets all so we need an endall or clearall reset

          when 1
            attrib = 'bold'
          when 2
            attrib = 'dim'
          when 4
            attrib = 'underline'
          when 5
            attrib = 'blink'
          when 7
            attrib = 'reverse'
          when 8
            attrib = 'hidden' # XXX
          when 30 
            color = 'black'
          when 31  
            color = 'red'
          when 32  
            color = 'green'
          when 33  
            color = 'yellow'
          when 34  
            color = 'blue'
          when 35  
            color = 'magenta'
          when 36  
            color = 'cyan'
          when 37  
            color = 'white'

            #Background colors
          when 40  
            bgcolor = 'black'
          when 41  
            bgcolor = 'red'
          when 42  
            bgcolor = 'green'
          when 43  
            bgcolor = 'yellow'
          when 44  
            bgcolor = 'blue'
          when 45  
            bgcolor = 'magenta'
          when 46  
            bgcolor = 'cyan'
          when 47  
            bgcolor = 'white'
          else
            $log.warn "XXX: WARN ANSI not used #{att} "
          end
        } # args.ea
      #} # e.each
        $log.debug "XXX:  ANSI YIELDING #{color} , #{bgcolor} , #{attrib} "
      yield [color,bgcolor,attrib] if block_given?
    else
      text = e
      yield text if block_given?
    end
  } # a.each
end