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VE: add backspace support in replace mode

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This commit is contained in:
Virgil Dupras 2020-06-11 22:29:05 -04:00
parent dc368597a6
commit 1871c46614
5 changed files with 8 additions and 7 deletions
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4
blk/130
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@ -4,7 +4,8 @@
SWAP _cpos FBUF ( len src dst ) ROT MOVE ; SWAP _cpos FBUF ( len src dst ) ROT MOVE ;
: $R ( replace mode ) : $R ( replace mode )
mode! 'R' EMIT mode! 'R' EMIT
BEGIN setpos KEY DUP 0x20 >= IF BEGIN setpos KEY DUP BS? IF -1 EDPOS +! DROP 0 THEN
DUP 0x20 >= IF
DUP EMIT EDPOS @ _cpos C! 1 EDPOS +! BLK!! 0 DUP EMIT EDPOS @ _cpos C! 1 EDPOS +! BLK!! 0
THEN UNTIL mode! SPC contents ; THEN UNTIL mode! SPC contents ;
: $O EDPOS @ 0x3c0 ( 15 * 64 ) >= IF EXIT THEN : $O EDPOS @ 0x3c0 ( 15 * 64 ) >= IF EXIT THEN
@ -13,4 +14,3 @@
: $D $H 64 icpy : $D $H 64 icpy
acc@ 0 DO 16 EDPOS @ 64 / DO i _mvln- LOOP LOOP acc@ 0 DO 16 EDPOS @ 64 / DO i _mvln- LOOP LOOP
BLK!! contents ; BLK!! contents ;

2
blk/378
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@ -12,3 +12,5 @@

6
blk/387
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@ -1,16 +1,16 @@
( handle backspace: go back one char in IN>, if possible, then ( handle backspace: go back one char in IN>, if possible, then
emit BS + SPC + BS ) emit BS + SPC + BS )
: (inbs) : _bs
( already at IN( ? ) ( already at IN( ? )
IN> @ IN( = IF EXIT THEN IN> @ IN( = IF EXIT THEN
IN> @ 1- IN> ! IN> @ 1- IN> !
BS SPC BS BS SPC BS
; ;
( del is same as backspace )
: BS? DUP 0x7f = SWAP 0x8 = OR ;
: KEY : KEY
85 RAM+ @ ( (key) override ) 85 RAM+ @ ( (key) override )
?DUP IF EXECUTE ELSE (key) THEN ; ?DUP IF EXECUTE ELSE (key) THEN ;
( cont.: read one char into input buffer and returns whether we ( cont.: read one char into input buffer and returns whether we
should continue, that is, whether CR was not met. ) should continue, that is, whether CR was not met. )

3
blk/388
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@ -1,10 +1,9 @@
: (rdlnc) ( -- c ) : (rdlnc) ( -- c )
( buffer overflow? same as if we typed a newline ) ( buffer overflow? same as if we typed a newline )
IN> @ IN) = IF 0x0a ELSE KEY THEN ( c ) IN> @ IN) = IF 0x0a ELSE KEY THEN ( c )
DUP 0x7f = IF DROP 0x8 THEN ( del? same as backspace )
DUP 0x0a = IF DROP 0xd THEN ( lf? same as cr ) DUP 0x0a = IF DROP 0xd THEN ( lf? same as cr )
( bacspace? handle and exit ) ( bacspace? handle and exit )
DUP 0x8 = IF (inbs) EXIT THEN DUP BS? IF _bs EXIT THEN
( echo back ) ( echo back )
DUP EMIT ( c ) DUP EMIT ( c )
( write and advance ) ( write and advance )

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emul/forth.bin
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