Annotation of gforth/history.fs, revision 1.3
1.3 ! pazsan 1: \ History file support 16oct94py
! 2:
! 3: 0 Value history
! 4:
! 5: 2Variable forward^
! 6: 2Variable backward^
! 7: 2Variable end^
! 8:
! 9: : get-history ( addr len -- wid )
! 10: 2dup r/w open-file 0<
! 11: IF drop r/w create-file throw ELSE nip nip THEN
! 12: to history
! 13: history file-size throw
! 14: 2dup forward^ 2! 2dup backward^ 2! end^ 2! ;
! 15:
! 16: s" gforth.history" get-history
! 17:
! 18: \ moving in history file 16oct94py
! 19:
! 20: : clear-line ( max span addr pos1 -- max addr )
! 21: backspaces over spaces swap backspaces ;
! 22:
! 23: : clear-tib ( max span addr pos -- max 0 addr 0 false )
! 24: clear-line 0 tuck dup ;
! 25:
! 26: : get-line ( max addr -- max span addr pos dpos )
! 27: history file-position throw backward^ 2!
! 28: 2dup swap history read-line throw drop
! 29: 2dup type tuck
! 30: history file-position throw forward^ 2! ;
! 31:
! 32: : next-line ( max span addr pos1 -- max span addr pos2 false )
! 33: clear-line
! 34: forward^ 2@ history reposition-file throw
! 35: get-line 0 ;
! 36:
! 37: : prev-line ( max span addr pos1 -- max span addr pos2 false )
! 38: clear-line over 2 + negate s>d backward^ 2@ d+ 0. dmax
! 39: 2dup history reposition-file throw
! 40: BEGIN 2over swap history read-line throw WHILE
! 41: >r history file-position throw
! 42: 2dup backward^ 2@ d< WHILE 2swap 2drop rdrop
! 43: REPEAT ELSE >r history file-position throw THEN
! 44: forward^ 2! backward^ 2! r> tuck 2dup type 0 ;
! 45:
! 46: : ctrl ( "<char>" -- ctrl-code )
! 47: char [char] @ - postpone Literal ; immediate
! 48:
! 49: Create lfpad #lf c,
! 50:
! 51: : (enter) ( max span addr pos1 -- max span addr pos2 true )
! 52: >r end^ 2@ history reposition-file throw
! 53: 2dup swap history write-file throw
! 54: lfpad 1 history write-file throw
! 55: history file-position throw 2dup backward^ 2! end^ 2!
! 56: r> (ret) ;
! 57:
! 58: \ some other key commands 16oct94py
! 59:
! 60: : first-pos ( max span addr pos1 -- max span addr 0 0 )
! 61: backspaces 0 0 ;
! 62: : end-pos ( max span addr pos1 -- max span addr span 0 )
! 63: type-rest 2drop over 0 ;
! 64:
! 65: : extract-word ( addr len -- addr' len' ) dup >r
! 66: BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+
! 67: tuck + r> rot - ;
! 68:
! 69: Create prefix-found 0 , 0 ,
! 70:
! 71: : word-lex ( nfa1 nfa2 -- -1/0/1 )
! 72: dup 0= IF 2drop 1 EXIT THEN
! 73: cell+ >r cell+ count $1F and
! 74: dup r@ c@ $1F and =
! 75: IF r> char+ capscomp 0<= EXIT THEN
! 76: nip r> c@ $1F and < ;
! 77:
! 78: : search-prefix ( addr len1 -- suffix len2 ) 0 >r context
! 79: BEGIN BEGIN dup @ over cell - @ = WHILE cell - REPEAT
! 80: dup >r -rot r> @ @
! 81: BEGIN dup WHILE >r dup r@ cell+ c@ $1F and <=
! 82: IF 2dup r@ cell+ char+ capscomp 0=
! 83: IF r> dup r@ word-lex
! 84: IF dup prefix-found @ word-lex
! 85: 0>= IF rdrop dup >r THEN
! 86: THEN >r
! 87: THEN
! 88: THEN r> @
! 89: REPEAT drop rot cell - dup vp u> 0=
! 90: UNTIL drop r> dup prefix-found ! ?dup
! 91: IF cell+ count $1F and rot /string rot drop
! 92: ELSE 2drop s" " THEN ;
! 93:
! 94: : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
! 95: prefix-found cell+ @ 0 ?DO (del) LOOP
! 96: 2dup extract-word search-prefix
! 97: dup prefix-found @ 0<> - prefix-found cell+ !
! 98: bounds ?DO I c@ (ins) LOOP
! 99: prefix-found @ IF bl (ins) THEN 0 ;
! 100:
! 101: : kill-prefix ( key -- key )
! 102: dup #tab <> IF 0 0 prefix-found 2! THEN ;
! 103:
! 104: ' kill-prefix IS everychar
! 105:
! 106: ' next-line ctrl N cells ctrlkeys + !
! 107: ' prev-line ctrl P cells ctrlkeys + !
! 108: ' clear-tib ctrl K cells ctrlkeys + !
! 109: ' first-pos ctrl A cells ctrlkeys + !
! 110: ' end-pos ctrl E cells ctrlkeys + !
! 111: ' (enter) #lf cells ctrlkeys + !
! 112: ' (enter) #cr cells ctrlkeys + !
! 113: ' tab-expand #tab cells ctrlkeys + !
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