\ Copyright 2021 Bradley D. Nelson 
\ 
\ Licensed under the Apache License, Version 2.0 (the "License"); 
\ you may not use this file except in compliance with the License. 
\ You may obtain a copy of the License at 
\ 
\     http://www.apache.org/licenses/LICENSE-2.0 
\ 
\ Unless required by applicable law or agreed to in writing, software 
\ distributed under the License is distributed on an "AS IS" BASIS, 
\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
\ See the License for the specific language governing permissions and 
\ limitations under the License. 
 
( ANSI Codes ) 
vocabulary ansi   ansi definitions 
: esc   27 emit ;   : bel   7 emit ; 
: clear-to-eol   esc ." [0K" ; 
: scroll-down   esc ." D" ; 
: scroll-up   esc ." M" ; 
: hide   esc ." [?25l" ; 
: show   esc ." [?25h" ; 
: terminal-save   esc ." [?1049h" ; 
: terminal-restore   esc ." [?1049l" ; 
 
forth definitions ansi 
: fg ( n -- ) esc ." [38;5;" n. ." m" ; 
: bg ( n -- ) esc ." [48;5;" n. ." m" ; 
: normal   esc ." [0m" ; 
: at-xy ( x y -- ) esc ." [" 1+ n. ." ;" 1+ n. ." H" ; 
: page   esc ." [2J" esc ." [H" ; 
: set-title ( a n -- ) esc ." ]0;" type bel ; 
forth 
 

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