terminal.coffee

   1 async = require 'async'
   2 fs = require 'fs'
   3
   4 class Terminal
   5         # public:
   6         constructor: (width, height) ->
   7                 @width = 1
   8                 @height = 1
   9                 @text = [""]
  10                 @attributes = [0]
  11                 @x = 0
  12                 @y = 0
  13                 @partial = ''
  14                 @resize width, height
  15                 @text_callbacks = []
  16                 @sequence_callbacks = []
  17
  18         on: (evt, callback) ->
  19                 @["#{evt}_callbacks"].push callback
  20
  21         resize: (width, height) ->
  22                 # FIXME: write a version that retains some of the data
  23                 @text = []
  24                 @attributes = []
  25                 for i in [0...height]
  26                         @text[i] = ""
  27                         @attributes[i] = new Array(width)
  28
  29         # pass data from stdout
  30         update: (data) ->
  31                 return unless data?.length > 0
  32                 if @partial.length > 0
  33                         data = @partial + data
  34                         @partial = ''
  35                 parts = data.split(/\x1b\[/)
  36                 if parts.length > 1
  37                         if -1 is @escape_sequence_length parts[parts.length - 1]
  38                                 @partial = parts.pop()
  39                 if parts.length > 0
  40                         for i in [0...parts.length]
  41                                 if i is 0
  42                                         @update_text parts[i]
  43                                 else
  44                                         @update_sequence_then_text parts[i]
  45                 return
  46
  47         # str has no escape sequences
  48         update_text: (str) ->
  49                 return unless str.length > 0
  50                 for c in @text_callbacks
  51                         c str
  52                 console.log "text: \"#{str}\"" # FIXME
  53
  54         # str is the whole escape sequence (minus the esc[ prefix)
  55         update_sequence: (str) ->
  56                 for c in @sequence_callbacks
  57                         c str
  58                 console.log "sequence: \"#{str}\"" # FIXME
  59
  60         update_sequence_then_text: (str) ->
  61                 len = @escape_sequence_length str
  62                 if len is -1
  63                         console.log "couldn't find escape sequence here: #{str.substr 0, 25}"
  64                         @update_text "ESC[" + str
  65                 else
  66                         @update_sequence str.substr 0, len
  67                         @update_text str.substr len
  68
  69         escape_sequence_length: (str) ->
  70                 parts = str.match(/^[0-9;?]{0,25}./)
  71                 return -1 unless parts?
  72                 return parts[0].length
  73
  74 exports.new = (width, height) ->
  75         return new Terminal width, height