Annotation of gforth/history.fs, revision 1.31

1.11      pazsan      1: \ command line edit and history support                 16oct94py
1.4       pazsan      2: 
1.31    ! anton       3: \ Copyright (C) 1995,2000,2003 Free Software Foundation, Inc.
1.8       anton       4: 
                      5: \ This file is part of Gforth.
                      6: 
                      7: \ Gforth is free software; you can redistribute it and/or
                      8: \ modify it under the terms of the GNU General Public License
                      9: \ as published by the Free Software Foundation; either version 2
                     10: \ of the License, or (at your option) any later version.
                     11: 
                     12: \ This program is distributed in the hope that it will be useful,
                     13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15: \ GNU General Public License for more details.
                     16: 
                     17: \ You should have received a copy of the GNU General Public License
                     18: \ along with this program; if not, write to the Free Software
1.26      anton      19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.8       anton      20: 
1.11      pazsan     21: :noname
                     22:     char [char] @ - ;
                     23: :noname
                     24:     char [char] @ - postpone Literal ;
1.12      anton      25: interpret/compile: ctrl  ( "<char>" -- ctrl-code )
1.11      pazsan     26: 
                     27: \ command line editing                                  16oct94py
                     28: 
                     29: : >string  ( span addr pos1 -- span addr pos1 addr2 len )
                     30:   over 3 pick 2 pick chars /string ;
                     31: : type-rest ( span addr pos1 -- span addr pos1 back )
                     32:   >string tuck type ;
                     33: : (del)  ( max span addr pos1 -- max span addr pos2 )
                     34:   1- >string over 1+ -rot move
                     35:   rot 1- -rot  #bs emit  type-rest bl emit 1+ backspaces ;
                     36: : (ins)  ( max span addr pos1 char -- max span addr pos2 )
                     37:   >r >string over 1+ swap move 2dup chars + r> swap c!
                     38:   rot 1+ -rot type-rest 1- backspaces 1+ ;
                     39: : ?del ( max span addr pos1 -- max span addr pos2 0 )
                     40:   dup  IF  (del)  THEN  0 ;
                     41: : (ret)  type-rest drop true space ;
                     42: : back  dup  IF  1- #bs emit  ELSE  #bell emit  THEN 0 ;
                     43: : forw 2 pick over <> IF  2dup + c@ emit 1+  ELSE  #bell emit  THEN 0 ;
1.23      pazsan     44: : <del> ( max span addr pos1 -- max span addr pos2 0 )
                     45:   2 pick over <>
                     46:        IF  forw drop (del)  ELSE  #bell emit  THEN  0 ;
                     47: : eof  2 pick over or 0=  IF  bye  ELSE  <del>  THEN ;
1.11      pazsan     48: 
1.27      pazsan     49: : bindkey ( xt key -- )  cells ctrlkeys + ! ;
                     50: 
                     51: ' forw  ctrl F bindkey
                     52: ' back  ctrl B bindkey
                     53: ' ?del  ctrl H bindkey
                     54: ' eof   ctrl D bindkey
                     55: ' <del> ctrl X bindkey
1.11      pazsan     56: 
                     57: ' (ins) IS insert-char
                     58: 
                     59: \ history support                                       16oct94py
                     60: 
1.13      anton      61: 0 Value history \ history file fid
1.4       pazsan     62: 
                     63: 2Variable forward^
                     64: 2Variable backward^
                     65: 2Variable end^
                     66: 
1.13      anton      67: : force-open ( addr len -- fid )
1.19      anton      68:     2dup r/w open-file
                     69:     IF
                     70:        drop r/w create-file throw
                     71:     ELSE
                     72:        nip nip
                     73:     THEN ;
1.4       pazsan     74: 
1.29      anton      75: s" os-class" environment? [IF] s" unix" str= [ELSE] true [THEN] 
1.15      jwilke     76: [IF]
1.16      pazsan     77: : history-file ( -- addr u )
1.14      pazsan     78:     s" GFORTHHIST" getenv dup 0= IF
                     79:        2drop s" ~/.gforth-history"
1.16      pazsan     80:     THEN ;
1.15      jwilke     81: [ELSE]
                     82: 
1.16      pazsan     83: : history-dir ( -- addr u )
1.15      jwilke     84:   s" TMP" getenv ?dup ?EXIT drop
                     85:   s" TEMP" getenv ?dup ?EXIT drop
                     86:   s" c:/" ;
                     87: 
1.16      pazsan     88: : history-file ( -- addr u )
1.15      jwilke     89:   s" GFORTHHIST" getenv ?dup ?EXIT
                     90:   drop
                     91:   history-dir pad place
1.16      pazsan     92:   s" /ghist.fs" pad +place pad count ;
                     93: [THEN]
1.15      jwilke     94: 
1.4       pazsan     95: \ moving in history file                               16oct94py
                     96: 
                     97: : clear-line ( max span addr pos1 -- max addr )
                     98:   backspaces over spaces swap backspaces ;
                     99: 
                    100: : clear-tib ( max span addr pos -- max 0 addr 0 false )
                    101:   clear-line 0 tuck dup ;
                    102: 
1.7       pazsan    103: : hist-pos    ( -- ud )  history file-position throw ;
                    104: : hist-setpos ( ud -- )  history reposition-file throw ;
1.4       pazsan    105: 
1.7       pazsan    106: : get-line ( addr len -- len' flag )
                    107:   swap history read-line throw ;
                    108: 
1.4       pazsan    109: : next-line  ( max span addr pos1 -- max span addr pos2 false )
                    110:   clear-line
1.7       pazsan    111:   forward^ 2@ 2dup hist-setpos backward^ 2!
                    112:   2dup get-line drop
                    113:   hist-pos  forward^ 2!
                    114:   tuck 2dup type 0 ;
1.4       pazsan    115: 
1.20      pazsan    116: : find-prev-line ( max addr -- max span addr pos2 )
                    117:   backward^ 2@ forward^ 2!
1.7       pazsan    118:   over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
                    119:   BEGIN
                    120:       backward^ 2!   2dup get-line  WHILE
                    121:       hist-pos 2dup forward^ 2@ d<  WHILE
                    122:       rot drop
1.20      pazsan    123:   REPEAT  2drop  THEN  tuck ;
                    124: 
                    125: : prev-line  ( max span addr pos1 -- max span addr pos2 false )
                    126:     clear-line find-prev-line 2dup type 0 ;
1.4       pazsan    127: 
                    128: Create lfpad #lf c,
                    129: 
                    130: : (enter)  ( max span addr pos1 -- max span addr pos2 true )
1.7       pazsan    131:   >r end^ 2@ hist-setpos
                    132:   2dup swap history write-line throw
                    133:   hist-pos 2dup backward^ 2! end^ 2!
1.4       pazsan    134:   r> (ret) ;
                    135: 
                    136: \ some other key commands                              16oct94py
                    137: 
                    138: : first-pos  ( max span addr pos1 -- max span addr 0 0 )
                    139:   backspaces 0 0 ;
                    140: : end-pos  ( max span addr pos1 -- max span addr span 0 )
                    141:   type-rest 2drop over 0 ;
                    142: 
                    143: : extract-word ( addr len -- addr' len' )  dup >r
                    144:   BEGIN  1- dup 0>=  WHILE  2dup + c@ bl =  UNTIL  THEN  1+
                    145:   tuck + r> rot - ;
                    146: 
                    147: Create prefix-found  0 , 0 ,
                    148: 
1.30      anton     149: : sgn ( n -- -1/0/1 )
                    150:  dup 0= IF EXIT THEN  0< 2* 1+ ;
                    151: 
                    152: : capscomp  ( c_addr1 u c_addr2 -- n )
                    153:  swap bounds
                    154:  ?DO  dup c@ I c@ <>
                    155:      IF  dup c@ toupper I c@ toupper =
                    156:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                    157:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                    158: 
1.4       pazsan    159: : word-lex ( nfa1 nfa2 -- -1/0/1 )
1.9       anton     160:     dup 0=
                    161:     IF
                    162:        2drop 1  EXIT
                    163:     THEN
                    164:     name>string 2>r name>string
                    165:     dup r@ =
                    166:     IF
                    167:        rdrop r> capscomp 0<= EXIT
                    168:     THEN
                    169:     r> <
                    170:     nip rdrop ;
1.4       pazsan    171: 
1.9       anton     172: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
                    173:     >r
                    174:     BEGIN
                    175:        dup
                    176:     WHILE
                    177:        >r dup r@ name>string nip <=
                    178:        IF
                    179:            2dup r@ name>string drop capscomp  0=
                    180:            IF
                    181:                r> dup r@ word-lex
                    182:                IF
                    183:                    dup prefix-found @ word-lex
                    184:                    0>=
                    185:                    IF
                    186:                        rdrop dup >r
                    187:                    THEN
                    188:                THEN
                    189:                >r
1.7       pazsan    190:            THEN
1.9       anton     191:        THEN
                    192:        r> @
                    193:     REPEAT
                    194:     drop r> ;
1.7       pazsan    195: 
                    196: : prefix-string ( addr len nfa -- addr' len' )
                    197:     dup prefix-found !  ?dup
1.9       anton     198:     IF
                    199:        name>string rot /string rot drop
1.7       pazsan    200:        dup 1+ prefix-found cell+ !
                    201:     ELSE
                    202:        2drop s" " prefix-found cell+ off
                    203:     THEN ;
                    204: 
                    205: : search-prefix  ( addr1 len1 -- addr2 len2 )
                    206:     0 vp dup @ 1- cells over +
                    207:     DO  I 2@ <>
1.17      pazsan    208:         IF  I cell+ @ wordlist-id @ swap  search-voc  THEN
1.7       pazsan    209:        [ -1 cells ] Literal +LOOP
                    210:     prefix-string ;
                    211: 
                    212: : kill-expand ( max span addr pos1 -- max span addr pos2 )
                    213:     prefix-found cell+ @  0 ?DO  (del)  LOOP ;
                    214: 
                    215: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
                    216:     5 pick over 4 pick + prefix-found @ 0<> - < ;
1.4       pazsan    217: 
                    218: : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
1.28      pazsan    219:     key? IF  #tab (ins) 0  EXIT  THEN
1.23      pazsan    220:     kill-expand  2dup extract-word dup 0= IF  nip EXIT  THEN
                    221:     search-prefix  tib-full?
1.7       pazsan    222:     IF    7 emit  2drop  0 0 prefix-found 2!
                    223:     ELSE  bounds ?DO  I c@ (ins)  LOOP  THEN
                    224:     prefix-found @ IF  bl (ins)  THEN  0 ;
1.4       pazsan    225: 
                    226: : kill-prefix  ( key -- key )
                    227:   dup #tab <> IF  0 0 prefix-found 2!  THEN ;
                    228: 
                    229: ' kill-prefix IS everychar
                    230: 
1.27      pazsan    231: ' next-line  ctrl N bindkey
                    232: ' prev-line  ctrl P bindkey
                    233: ' clear-tib  ctrl K bindkey
                    234: ' first-pos  ctrl A bindkey
                    235: ' end-pos    ctrl E bindkey
                    236: ' (enter)    #lf    bindkey
                    237: ' (enter)    #cr    bindkey
                    238: ' tab-expand #tab   bindkey
1.19      anton     239: 
                    240: \ initializing history
                    241: 
                    242: : get-history ( addr len -- )
                    243:     ['] force-open catch
                    244:     ?dup-if
                    245:        \ !! >stderr
1.21      pazsan    246:         \ history-file type ." : " .error cr
                    247:        drop 2drop
1.19      anton     248:        ['] false ['] false ['] (ret)
                    249:     else
                    250:        to history
                    251:        history file-size throw
                    252:        2dup forward^ 2! 2dup backward^ 2! end^ 2!
                    253:        ['] next-line ['] prev-line ['] (enter)
                    254:     endif
1.27      pazsan    255:     dup #lf bindkey
                    256:         #cr bindkey
                    257:      ctrl P bindkey
                    258:      ctrl N bindkey
1.19      anton     259: ;
                    260: 
                    261: : history-cold ( -- )
                    262:     history-file get-history ;
                    263: 
                    264: ' history-cold INIT8 chained
                    265: history-cold
                    266: 

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