lib/console.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # Simple numerical statistical analysis and presentation
  16 module console
  17
  18 # Redef String class to add a function to color the string
  19 redef class String
  20         private fun add_escape_char(escapechar: String): String do
  21                 return "{escapechar}{self}{esc}[0m"
  22         end
  23
  24         private fun esc: Char do return 27.ascii
  25         fun gray: String do return add_escape_char("{esc}[30m")
  26         fun red: String do return add_escape_char("{esc}[31m")
  27         fun green: String do return add_escape_char("{esc}[32m")
  28         fun yellow: String do return add_escape_char("{esc}[33m")
  29         fun blue: String do return add_escape_char("{esc}[34m")
  30         fun purple: String do return add_escape_char("{esc}[35m")
  31         fun cyan: String do return add_escape_char("{esc}[36m")
  32         fun light_gray: String do return add_escape_char("{esc}[37m")
  33         fun bold: String do return add_escape_char("{esc}[1m")
  34         fun underline: String do return add_escape_char("{esc}[4m")
  35 end
  36