Annotation of gforth/history.fs, revision 1.44

1.11      pazsan      1: \ command line edit and history support                 16oct94py
1.4       pazsan      2: 
1.43      anton       3: \ Copyright (C) 1995,2000,2003,2004,2005 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: 
1.27      pazsan     32: : bindkey ( xt key -- )  cells ctrlkeys + ! ;
                     33: 
1.11      pazsan     34: \ history support                                       16oct94py
                     35: 
1.13      anton      36: 0 Value history \ history file fid
1.4       pazsan     37: 
                     38: 2Variable forward^
                     39: 2Variable backward^
                     40: 2Variable end^
                     41: 
1.13      anton      42: : force-open ( addr len -- fid )
1.19      anton      43:     2dup r/w open-file
                     44:     IF
                     45:        drop r/w create-file throw
                     46:     ELSE
                     47:        nip nip
                     48:     THEN ;
1.4       pazsan     49: 
1.29      anton      50: s" os-class" environment? [IF] s" unix" str= [ELSE] true [THEN] 
1.15      jwilke     51: [IF]
1.16      pazsan     52: : history-file ( -- addr u )
1.14      pazsan     53:     s" GFORTHHIST" getenv dup 0= IF
                     54:        2drop s" ~/.gforth-history"
1.16      pazsan     55:     THEN ;
1.15      jwilke     56: [ELSE]
                     57: 
1.16      pazsan     58: : history-dir ( -- addr u )
1.15      jwilke     59:   s" TMP" getenv ?dup ?EXIT drop
                     60:   s" TEMP" getenv ?dup ?EXIT drop
                     61:   s" c:/" ;
                     62: 
1.16      pazsan     63: : history-file ( -- addr u )
1.15      jwilke     64:   s" GFORTHHIST" getenv ?dup ?EXIT
                     65:   drop
                     66:   history-dir pad place
1.16      pazsan     67:   s" /ghist.fs" pad +place pad count ;
                     68: [THEN]
1.15      jwilke     69: 
1.4       pazsan     70: \ moving in history file                               16oct94py
                     71: 
1.44    ! anton      72: defer back-restore ( u -- )
        !            73: ' backspaces is back-restore
        !            74: 
1.4       pazsan     75: : clear-line ( max span addr pos1 -- max addr )
1.44    ! anton      76:   back-restore over spaces swap backspaces ;
1.4       pazsan     77: 
1.41      anton      78: \ : clear-tib ( max span addr pos -- max 0 addr 0 false )
                     79: \   clear-line 0 tuck dup ;
1.4       pazsan     80: 
1.32      pazsan     81: : hist-pos    ( -- ud )  history file-position drop ( throw ) ;
                     82: : hist-setpos ( ud -- )  history reposition-file drop ( throw ) ;
1.4       pazsan     83: 
1.7       pazsan     84: : get-line ( addr len -- len' flag )
                     85:   swap history read-line throw ;
                     86: 
1.4       pazsan     87: : next-line  ( max span addr pos1 -- max span addr pos2 false )
                     88:   clear-line
1.7       pazsan     89:   forward^ 2@ 2dup hist-setpos backward^ 2!
                     90:   2dup get-line drop
                     91:   hist-pos  forward^ 2!
                     92:   tuck 2dup type 0 ;
1.4       pazsan     93: 
1.20      pazsan     94: : find-prev-line ( max addr -- max span addr pos2 )
                     95:   backward^ 2@ forward^ 2!
1.7       pazsan     96:   over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
                     97:   BEGIN
                     98:       backward^ 2!   2dup get-line  WHILE
                     99:       hist-pos 2dup forward^ 2@ d<  WHILE
                    100:       rot drop
1.20      pazsan    101:   REPEAT  2drop  THEN  tuck ;
                    102: 
                    103: : prev-line  ( max span addr pos1 -- max span addr pos2 false )
                    104:     clear-line find-prev-line 2dup type 0 ;
1.4       pazsan    105: 
1.41      anton     106: \ Create lfpad #lf c,
1.4       pazsan    107: 
                    108: : (enter)  ( max span addr pos1 -- max span addr pos2 true )
1.7       pazsan    109:   >r end^ 2@ hist-setpos
1.32      pazsan    110:   2dup swap history write-line drop ( throw ) \ don't worry about errors
1.7       pazsan    111:   hist-pos 2dup backward^ 2! end^ 2!
1.4       pazsan    112:   r> (ret) ;
                    113: 
                    114: : extract-word ( addr len -- addr' len' )  dup >r
                    115:   BEGIN  1- dup 0>=  WHILE  2dup + c@ bl =  UNTIL  THEN  1+
                    116:   tuck + r> rot - ;
                    117: 
                    118: Create prefix-found  0 , 0 ,
                    119: 
1.30      anton     120: : sgn ( n -- -1/0/1 )
                    121:  dup 0= IF EXIT THEN  0< 2* 1+ ;
                    122: 
                    123: : capscomp  ( c_addr1 u c_addr2 -- n )
                    124:  swap bounds
                    125:  ?DO  dup c@ I c@ <>
                    126:      IF  dup c@ toupper I c@ toupper =
                    127:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                    128:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                    129: 
1.4       pazsan    130: : word-lex ( nfa1 nfa2 -- -1/0/1 )
1.9       anton     131:     dup 0=
                    132:     IF
                    133:        2drop 1  EXIT
                    134:     THEN
                    135:     name>string 2>r name>string
                    136:     dup r@ =
                    137:     IF
                    138:        rdrop r> capscomp 0<= EXIT
                    139:     THEN
                    140:     r> <
                    141:     nip rdrop ;
1.4       pazsan    142: 
1.9       anton     143: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
                    144:     >r
                    145:     BEGIN
                    146:        dup
                    147:     WHILE
                    148:        >r dup r@ name>string nip <=
                    149:        IF
                    150:            2dup r@ name>string drop capscomp  0=
                    151:            IF
                    152:                r> dup r@ word-lex
                    153:                IF
                    154:                    dup prefix-found @ word-lex
                    155:                    0>=
                    156:                    IF
                    157:                        rdrop dup >r
                    158:                    THEN
                    159:                THEN
                    160:                >r
1.7       pazsan    161:            THEN
1.9       anton     162:        THEN
                    163:        r> @
                    164:     REPEAT
                    165:     drop r> ;
1.7       pazsan    166: 
1.35      pazsan    167: : prefix-off ( -- )  0 0 prefix-found 2! ;
                    168: 
1.7       pazsan    169: : prefix-string ( addr len nfa -- addr' len' )
                    170:     dup prefix-found !  ?dup
1.9       anton     171:     IF
                    172:        name>string rot /string rot drop
1.7       pazsan    173:        dup 1+ prefix-found cell+ !
                    174:     ELSE
1.35      pazsan    175:        2drop s" " prefix-off
1.7       pazsan    176:     THEN ;
                    177: 
                    178: : search-prefix  ( addr1 len1 -- addr2 len2 )
                    179:     0 vp dup @ 1- cells over +
                    180:     DO  I 2@ <>
1.17      pazsan    181:         IF  I cell+ @ wordlist-id @ swap  search-voc  THEN
1.7       pazsan    182:        [ -1 cells ] Literal +LOOP
                    183:     prefix-string ;
                    184: 
                    185: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
                    186:     5 pick over 4 pick + prefix-found @ 0<> - < ;
1.4       pazsan    187: 
                    188: : kill-prefix  ( key -- key )
1.36      pazsan    189:   dup #tab <> IF  prefix-off  THEN ;
1.33      pazsan    190: 
                    191: \ UTF-8 support
                    192: 
1.38      anton     193: require utf-8.fs
1.33      pazsan    194: 
1.39      anton     195: [IFUNDEF] #esc  27 Constant #esc  [THEN]
                    196: 
                    197: : save-cursor ( -- )  #esc emit '7 emit ;
                    198: : restore-cursor ( -- )  #esc emit '8 emit ;
                    199: : .rest ( addr pos1 -- addr pos1 )
                    200:     restore-cursor 2dup type ;
                    201: : .all ( span addr pos1 -- span addr pos1 )
                    202:     restore-cursor >r 2dup swap type r> ;
1.44    ! anton     203: : xback-restore ( u -- )
        !           204:     drop restore-cursor ;
        !           205: 
        !           206: \ In the following, addr max is the buffer, addr span is the current
        !           207: \ string in the buffer, and pos1 is the cursor position in the buffer.
1.39      anton     208: 
1.40      anton     209: : <xins>  ( max span addr pos1 xc -- max span addr pos2 )
                    210:     >r  2over r@ xc-size + u< IF  ( max span addr pos1 R:xc )
                    211:        rdrop bell  EXIT  THEN
                    212:     >string over r@ xc-size + swap move
                    213:     2dup chars + r@ swap r@ xc-size xc!+? 2drop drop
                    214:     r> xc-size >r  rot r@ chars + -rot r> chars + ;
                    215: : (xins)  ( max span addr pos1 xc -- max span addr pos2 )
                    216:     <xins> .all .rest ;
                    217: : xback  ( max span addr pos1 -- max span addr pos2 f )
                    218:     dup  IF  over + xchar- over -  0 max .all .rest
1.39      anton     219:     ELSE  bell  THEN 0 ;
1.40      anton     220: : xforw  ( max span addr pos1 -- max span addr pos2 f )
                    221:     2 pick over <> IF  over + xc@+ xemit over -  ELSE  bell  THEN 0 ;
                    222: : (xdel)  ( max span addr pos1 -- max span addr pos2 )
                    223:     over + dup xchar- tuck - >r over -
1.39      anton     224:     >string over r@ + -rot move
                    225:     rot r> - -rot ;
1.40      anton     226: : ?xdel ( max span addr pos1 -- max span addr pos2 0 )
                    227:   dup  IF  (xdel) .all 2 spaces .rest  THEN  0 ;
                    228: : <xdel> ( max span addr pos1 -- max span addr pos2 0 )
1.39      anton     229:   2 pick over <>
1.40      anton     230:     IF  xforw drop (xdel) .all 2 spaces .rest
1.39      anton     231:     ELSE  bell  THEN  0 ;
1.40      anton     232: : xeof  2 pick over or 0=  IF  bye  ELSE  <xdel>  THEN ;
1.39      anton     233: 
1.40      anton     234: : xfirst-pos  ( max span addr pos1 -- max span addr 0 0 )
1.39      anton     235:   drop 0 .all .rest 0 ;
1.40      anton     236: : xend-pos  ( max span addr pos1 -- max span addr span 0 )
1.39      anton     237:   drop over .all 0 ;
                    238: 
                    239: 
1.40      anton     240: : xclear-line ( max span addr pos1 -- max addr )
1.39      anton     241:     drop restore-cursor swap spaces restore-cursor ;
1.40      anton     242: : xclear-tib ( max span addr pos -- max 0 addr 0 false )
                    243:     xclear-line 0 tuck dup ;
1.39      anton     244: 
1.40      anton     245: : (xenter)  ( max span addr pos1 -- max span addr pos2 true )
1.39      anton     246:     >r end^ 2@ hist-setpos
                    247:     2dup swap history write-line drop ( throw ) \ don't worry about errors
                    248:     hist-pos 2dup backward^ 2! end^ 2!
                    249:     r> .all space true ;
                    250: 
1.40      anton     251: : xkill-expand ( max span addr pos1 -- max span addr pos2 )
1.39      anton     252:     prefix-found cell+ @ ?dup IF  >r
                    253:        r@ - >string over r@ + -rot move
                    254:        rot r@ - -rot .all r> spaces .rest THEN ;
                    255: 
                    256: : insert   ( string length buffer size -- )
                    257:     rot over min >r  r@ - ( left over )
                    258:     over dup r@ +  rot move   r> move  ;
                    259: 
1.40      anton     260: : xtab-expand ( max span addr pos1 -- max span addr pos2 0 )
                    261:     key? IF  #tab (xins) 0  EXIT  THEN
                    262:     xkill-expand 2dup extract-word dup 0= IF  nip EXIT  THEN
1.39      anton     263:     search-prefix tib-full?
1.40      anton     264:     IF    bell  2drop  prefix-off
1.39      anton     265:     ELSE  dup >r
                    266:        2>r >string r@ + 2r> 2swap insert
                    267:        r@ + rot r> + -rot
                    268:     THEN
1.40      anton     269:     prefix-found @ IF  bl (xins)  ELSE  .all .rest  THEN  0 ;
1.39      anton     270: 
1.40      anton     271: : xchar-history ( -- )
                    272:     ['] xforw        ctrl F bindkey
                    273:     ['] xback        ctrl B bindkey
                    274:     ['] ?xdel        ctrl H bindkey
                    275:     ['] xeof         ctrl D bindkey
                    276:     ['] <xdel>       ctrl X bindkey
                    277:     ['] xclear-tib   ctrl K bindkey
                    278:     ['] xfirst-pos   ctrl A bindkey
                    279:     ['] xend-pos     ctrl E bindkey
                    280:     ['] (xenter)     #lf    bindkey
                    281:     ['] (xenter)     #cr    bindkey
                    282:     ['] xtab-expand  #tab   bindkey
                    283:     ['] (xins)       IS insert-char
1.39      anton     284:     ['] kill-prefix  IS everychar
1.44    ! anton     285:     ['] save-cursor  IS everyline
        !           286:     ['] xback-restore IS back-restore
        !           287: ;
1.39      anton     288: 
1.40      anton     289: xchar-history
1.19      anton     290: 
                    291: \ initializing history
                    292: 
                    293: : get-history ( addr len -- )
                    294:     ['] force-open catch
                    295:     ?dup-if
                    296:        \ !! >stderr
1.21      pazsan    297:         \ history-file type ." : " .error cr
                    298:        drop 2drop
1.19      anton     299:        ['] false ['] false ['] (ret)
                    300:     else
                    301:        to history
                    302:        history file-size throw
                    303:        2dup forward^ 2! 2dup backward^ 2! end^ 2!
                    304:        ['] next-line ['] prev-line ['] (enter)
                    305:     endif
1.27      pazsan    306:     dup #lf bindkey
                    307:         #cr bindkey
                    308:      ctrl P bindkey
                    309:      ctrl N bindkey
1.19      anton     310: ;
                    311: 
                    312: : history-cold ( -- )
1.42      pazsan    313:     history-file get-history xchar-history ;
1.19      anton     314: 
                    315: ' history-cold INIT8 chained
                    316: history-cold
                    317: 

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