mirror of https://github.com/mgcaret/of816.git
73 lines
1.4 KiB
Forth
73 lines
1.4 KiB
Forth
start1 decimal
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." OF816 screen EDITOR by M.G. "
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s" get-current vocabulary EDITOR also EDITOR definitions" evaluate
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headers
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\ necessary defers
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defer $at-xy
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s" at-xy" $find 0= if abort then to $at-xy
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defer $page
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s" page" $find 0= if abort then to $page
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defer $-trailing
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s" -trailing" $find 0= if abort then to $-trailing
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\ other defers
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external
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defer $header \ to be used to display block #, etc.
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' noop to $header
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headers
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\ set up variables
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64 value $c/l
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0 value $buf
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\ adapted from miniEDIT in Bill Meunch post to comp.lang.forth 1/24/2010
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: head ( -- )
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." -Mini Editor- " $header
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;
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: ll ( line# -- )
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dup $c/l * $buf + $c/l type space 0 <# # # #> type
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;
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: list ( addr -- )
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0 begin cr dup ll 1+ dup 16 = until drop
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;
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: !xy ( i -- i ) 1023 and dup $c/l /mod 1+ $at-xy ;
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: !ch ( c i -- c i ) 2dup $buf + c! over emit ;
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: ?ch ( c i -- c i' )
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over bl - 95 u< if !ch 1+ exit then
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over 8 = if 1- then ( left backspace )
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over 127 = if 1- then ( left delete )
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over 12 = if 1+ then ( right )
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over 11 = if $c/l - then ( up )
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over 10 = if $c/l + then ( down )
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over 13 = if $c/l 2dup mod - + then ( cr )
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\ mx1 ( <- uncomment and put extensions here )
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;
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external
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: $edit ( addr -- )
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to $buf
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$page 0 dup $at-xy head list 0
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begin !xy key swap ?ch swap 27 = until drop $page 0 dup $at-xy
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;
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: new-ram-screen
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1024 alloc-mem dup 1024 blank
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;
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: load-ram-screen
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1024 $-trailing eval
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;
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s" previous set-current" evaluate
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." loaded!" cr
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fcode-end
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