collapseos/blk/105
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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: _type ( buf -- )
C< DUP 0xd = IF 2DROP EXIT THEN SWAP DUP _zbuf ( c a )
BEGIN ( c a ) C!+ C< TUCK 0x0d = UNTIL ( c a ) C! ;
( user-facing lines are 1-based )
: T 1- DUP 64 * EDPOS ! _pln ;
: P IBUF _type IBUF EDPOS @ _cpos 64 MOVE BLK!! ;
: _mvln+ ( ln -- move ln 1 line down )
DUP 14 > IF DROP EXIT THEN
_lpos DUP 64 + 64 MOVE ;
: _mvln- ( ln -- move ln 1 line up )
DUP 14 > IF DROP 15 _lpos _zbuf
ELSE 1+ _lpos DUP 64 - 64 MOVE THEN ;