Annotation of gforth/history.fs, revision 1.43

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

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