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collapseos/blk/108
Virgil Dupras 4d893d90fc VE: Improve I and F buffer typing
Previously, it would keep the old buffer displayed why typing over
it. I had kept it thus because I didn't want to erase the buffer
right away because the behavior is that when we type nothing, we
keep the buffer as-is and repeat the action.

Now, the behavior of I and F is much better. It keeps the buffer
displayed until the first non-return keystroke and then erases it.

Also, fixed PSP leak in _type and fixed PSP overuse in successful
_F (they balanced out).
2020-06-08 21:23:23 -04:00

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: _blen ( buf -- length of str in buf )
DUP BEGIN C@+ EOL? UNTIL -^ 1- ;
: _rbufsz ( size of linebuf to the right of curpos )
EDPOS @ 64 MOD 63 -^ ;
: i COMPILE I ; IMMEDIATE ( save overshadowed )
: _I ( I without _pln and _type. used in VE )
_rbufsz IBUF _blen 2DUP > IF
TUCK - ( ilen chars-to-move )
SWAP EDPOS @ _cpos 2DUP + ( ctm ilen a a+ilen )
3 PICK MOVE- ( ctm ilen )
NIP ( ilen )
ELSE DROP ( ilen becomes rbuffsize )
THEN
DUP IBUF EDPOS @ _cpos ROT MOVE ( ilen ) EDPOS +! BLK!! ;
: I IBUF _type _I EDPOS @ 64 / _pln ;