block-021.fth

block-fn( --fn )
p2 z" block-" s-cpy blk <# # # #s #> s-cat z" .fth" s-cat ;
t1( ch-- )
dup 10 =if
drop row++ 0 >col rc>pos t! exitthen
dup 4 >if
32 maxthen
!t+ ;
t2
atdrop nt-lines ;
work->block
work >a  block >t  0 dup >row/col

   begin  @a+ ?dupif0
t2 exitthen
t1 row rows < while t2 ;
clear-block( addr-- )
block-sz 32 fill ;
rl( reload block )
work clear-block  block clear-block

   block-fn fopen-rb ?dupif

       >t work block-sz t@ fread drop t> fclose

  then
work->block clean show! 0 dup >row/col ;
ed!( blk-- )
>blk rl ;
normal-mode 
0 ;   insert-mode 
1 ;    replace-mode 
2 ;   quit-mode
99 ;
normal-mode? 
normal-mode  ed-mode = ;  normal-mode! 
normal-mode  >ed-mode ;
insert-mode? 
insert-mode  ed-mode = ;  insert-mode! 
insert-mode  >ed-mode ;
replace-mode?
replace-mode ed-mode = ;  replace-mode!
replace-mode >ed-mode ;
quit?        
quit-mode    ed-mode = ;  q!           
quit-mode    >ed-mode ;
.mode
space normal-mode?if
." -normal-" exitthen

   red insert-mode?if
." -insert-"then

   replace-mode?if
." -replace-"then

   white ;
insert-toggle

   normal-mode?if
insert-mode!  exitthen

   insert-mode?if
replace-mode! exitthen

   normal-mode! ;
ks( -- )
yellow ." %n(press a key ...)" white key drop cls show! ;