Annotation of gforth/history.fs, revision 1.49

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: 
1.47      pazsan     75: [IFDEF] x-width
1.4       pazsan     76: : clear-line ( max span addr pos1 -- max addr )
1.46      pazsan     77:   back-restore over over swap x-width spaces swap back-restore ;
1.47      pazsan     78: [ELSE]
                     79: : clear-line ( max span addr pos1 -- max addr )
                     80:   back-restore over spaces swap back-restore ;
                     81: [THEN]
1.41      anton      82: \ : clear-tib ( max span addr pos -- max 0 addr 0 false )
                     83: \   clear-line 0 tuck dup ;
1.4       pazsan     84: 
1.32      pazsan     85: : hist-pos    ( -- ud )  history file-position drop ( throw ) ;
                     86: : hist-setpos ( ud -- )  history reposition-file drop ( throw ) ;
1.4       pazsan     87: 
1.7       pazsan     88: : get-line ( addr len -- len' flag )
                     89:   swap history read-line throw ;
                     90: 
1.4       pazsan     91: : next-line  ( max span addr pos1 -- max span addr pos2 false )
                     92:   clear-line
1.7       pazsan     93:   forward^ 2@ 2dup hist-setpos backward^ 2!
                     94:   2dup get-line drop
                     95:   hist-pos  forward^ 2!
                     96:   tuck 2dup type 0 ;
1.4       pazsan     97: 
1.20      pazsan     98: : find-prev-line ( max addr -- max span addr pos2 )
                     99:   backward^ 2@ forward^ 2!
1.7       pazsan    100:   over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
                    101:   BEGIN
                    102:       backward^ 2!   2dup get-line  WHILE
                    103:       hist-pos 2dup forward^ 2@ d<  WHILE
                    104:       rot drop
1.20      pazsan    105:   REPEAT  2drop  THEN  tuck ;
                    106: 
                    107: : prev-line  ( max span addr pos1 -- max span addr pos2 false )
                    108:     clear-line find-prev-line 2dup type 0 ;
1.4       pazsan    109: 
1.41      anton     110: \ Create lfpad #lf c,
1.4       pazsan    111: 
                    112: : (enter)  ( max span addr pos1 -- max span addr pos2 true )
1.7       pazsan    113:   >r end^ 2@ hist-setpos
1.32      pazsan    114:   2dup swap history write-line drop ( throw ) \ don't worry about errors
1.7       pazsan    115:   hist-pos 2dup backward^ 2! end^ 2!
1.4       pazsan    116:   r> (ret) ;
                    117: 
                    118: : extract-word ( addr len -- addr' len' )  dup >r
                    119:   BEGIN  1- dup 0>=  WHILE  2dup + c@ bl =  UNTIL  THEN  1+
                    120:   tuck + r> rot - ;
                    121: 
                    122: Create prefix-found  0 , 0 ,
                    123: 
1.30      anton     124: : sgn ( n -- -1/0/1 )
                    125:  dup 0= IF EXIT THEN  0< 2* 1+ ;
                    126: 
                    127: : capscomp  ( c_addr1 u c_addr2 -- n )
                    128:  swap bounds
                    129:  ?DO  dup c@ I c@ <>
                    130:      IF  dup c@ toupper I c@ toupper =
                    131:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                    132:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                    133: 
1.4       pazsan    134: : word-lex ( nfa1 nfa2 -- -1/0/1 )
1.9       anton     135:     dup 0=
                    136:     IF
                    137:        2drop 1  EXIT
                    138:     THEN
                    139:     name>string 2>r name>string
                    140:     dup r@ =
                    141:     IF
                    142:        rdrop r> capscomp 0<= EXIT
                    143:     THEN
                    144:     r> <
                    145:     nip rdrop ;
1.4       pazsan    146: 
1.9       anton     147: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
                    148:     >r
                    149:     BEGIN
                    150:        dup
                    151:     WHILE
                    152:        >r dup r@ name>string nip <=
                    153:        IF
                    154:            2dup r@ name>string drop capscomp  0=
                    155:            IF
                    156:                r> dup r@ word-lex
                    157:                IF
                    158:                    dup prefix-found @ word-lex
                    159:                    0>=
                    160:                    IF
                    161:                        rdrop dup >r
                    162:                    THEN
                    163:                THEN
                    164:                >r
1.7       pazsan    165:            THEN
1.9       anton     166:        THEN
                    167:        r> @
                    168:     REPEAT
                    169:     drop r> ;
1.7       pazsan    170: 
1.35      pazsan    171: : prefix-off ( -- )  0 0 prefix-found 2! ;
                    172: 
1.7       pazsan    173: : prefix-string ( addr len nfa -- addr' len' )
                    174:     dup prefix-found !  ?dup
1.9       anton     175:     IF
                    176:        name>string rot /string rot drop
1.7       pazsan    177:        dup 1+ prefix-found cell+ !
                    178:     ELSE
1.35      pazsan    179:        2drop s" " prefix-off
1.7       pazsan    180:     THEN ;
                    181: 
                    182: : search-prefix  ( addr1 len1 -- addr2 len2 )
                    183:     0 vp dup @ 1- cells over +
                    184:     DO  I 2@ <>
1.17      pazsan    185:         IF  I cell+ @ wordlist-id @ swap  search-voc  THEN
1.7       pazsan    186:        [ -1 cells ] Literal +LOOP
                    187:     prefix-string ;
                    188: 
                    189: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
                    190:     5 pick over 4 pick + prefix-found @ 0<> - < ;
1.4       pazsan    191: 
                    192: : kill-prefix  ( key -- key )
1.36      pazsan    193:   dup #tab <> IF  prefix-off  THEN ;
1.33      pazsan    194: 
                    195: \ UTF-8 support
                    196: 
1.38      anton     197: require utf-8.fs
1.33      pazsan    198: 
1.39      anton     199: [IFUNDEF] #esc  27 Constant #esc  [THEN]
                    200: 
                    201: : save-cursor ( -- )  #esc emit '7 emit ;
                    202: : restore-cursor ( -- )  #esc emit '8 emit ;
                    203: : .rest ( addr pos1 -- addr pos1 )
                    204:     restore-cursor 2dup type ;
                    205: : .all ( span addr pos1 -- span addr pos1 )
                    206:     restore-cursor >r 2dup swap type r> ;
1.44      anton     207: : xback-restore ( u -- )
                    208:     drop restore-cursor ;
                    209: 
                    210: \ In the following, addr max is the buffer, addr span is the current
                    211: \ string in the buffer, and pos1 is the cursor position in the buffer.
1.39      anton     212: 
1.40      anton     213: : <xins>  ( max span addr pos1 xc -- max span addr pos2 )
                    214:     >r  2over r@ xc-size + u< IF  ( max span addr pos1 R:xc )
                    215:        rdrop bell  EXIT  THEN
                    216:     >string over r@ xc-size + swap move
                    217:     2dup chars + r@ swap r@ xc-size xc!+? 2drop drop
                    218:     r> xc-size >r  rot r@ chars + -rot r> chars + ;
                    219: : (xins)  ( max span addr pos1 xc -- max span addr pos2 )
                    220:     <xins> .all .rest ;
                    221: : xback  ( max span addr pos1 -- max span addr pos2 f )
                    222:     dup  IF  over + xchar- over -  0 max .all .rest
1.39      anton     223:     ELSE  bell  THEN 0 ;
1.40      anton     224: : xforw  ( max span addr pos1 -- max span addr pos2 f )
                    225:     2 pick over <> IF  over + xc@+ xemit over -  ELSE  bell  THEN 0 ;
                    226: : (xdel)  ( max span addr pos1 -- max span addr pos2 )
                    227:     over + dup xchar- tuck - >r over -
1.39      anton     228:     >string over r@ + -rot move
                    229:     rot r> - -rot ;
1.40      anton     230: : ?xdel ( max span addr pos1 -- max span addr pos2 0 )
                    231:   dup  IF  (xdel) .all 2 spaces .rest  THEN  0 ;
                    232: : <xdel> ( max span addr pos1 -- max span addr pos2 0 )
1.39      anton     233:   2 pick over <>
1.40      anton     234:     IF  xforw drop (xdel) .all 2 spaces .rest
1.39      anton     235:     ELSE  bell  THEN  0 ;
1.40      anton     236: : xeof  2 pick over or 0=  IF  bye  ELSE  <xdel>  THEN ;
1.39      anton     237: 
1.40      anton     238: : xfirst-pos  ( max span addr pos1 -- max span addr 0 0 )
1.39      anton     239:   drop 0 .all .rest 0 ;
1.40      anton     240: : xend-pos  ( max span addr pos1 -- max span addr span 0 )
1.39      anton     241:   drop over .all 0 ;
                    242: 
                    243: 
1.40      anton     244: : xclear-line ( max span addr pos1 -- max addr )
1.39      anton     245:     drop restore-cursor swap spaces restore-cursor ;
1.40      anton     246: : xclear-tib ( max span addr pos -- max 0 addr 0 false )
                    247:     xclear-line 0 tuck dup ;
1.39      anton     248: 
1.40      anton     249: : (xenter)  ( max span addr pos1 -- max span addr pos2 true )
1.39      anton     250:     >r end^ 2@ hist-setpos
                    251:     2dup swap history write-line drop ( throw ) \ don't worry about errors
                    252:     hist-pos 2dup backward^ 2! end^ 2!
                    253:     r> .all space true ;
                    254: 
1.40      anton     255: : xkill-expand ( max span addr pos1 -- max span addr pos2 )
1.39      anton     256:     prefix-found cell+ @ ?dup IF  >r
                    257:        r@ - >string over r@ + -rot move
                    258:        rot r@ - -rot .all r> spaces .rest THEN ;
                    259: 
                    260: : insert   ( string length buffer size -- )
                    261:     rot over min >r  r@ - ( left over )
                    262:     over dup r@ +  rot move   r> move  ;
                    263: 
1.40      anton     264: : xtab-expand ( max span addr pos1 -- max span addr pos2 0 )
                    265:     key? IF  #tab (xins) 0  EXIT  THEN
                    266:     xkill-expand 2dup extract-word dup 0= IF  nip EXIT  THEN
1.39      anton     267:     search-prefix tib-full?
1.40      anton     268:     IF    bell  2drop  prefix-off
1.39      anton     269:     ELSE  dup >r
                    270:        2>r >string r@ + 2r> 2swap insert
                    271:        r@ + rot r> + -rot
                    272:     THEN
1.40      anton     273:     prefix-found @ IF  bl (xins)  ELSE  .all .rest  THEN  0 ;
1.39      anton     274: 
1.40      anton     275: : xchar-history ( -- )
                    276:     ['] xforw        ctrl F bindkey
                    277:     ['] xback        ctrl B bindkey
                    278:     ['] ?xdel        ctrl H bindkey
                    279:     ['] xeof         ctrl D bindkey
                    280:     ['] <xdel>       ctrl X bindkey
                    281:     ['] xclear-tib   ctrl K bindkey
                    282:     ['] xfirst-pos   ctrl A bindkey
                    283:     ['] xend-pos     ctrl E bindkey
1.49    ! pazsan    284:     history IF  ['] (xenter)     #lf    bindkey  THEN
        !           285:     history IF  ['] (xenter)     #cr    bindkey  THEN
1.40      anton     286:     ['] xtab-expand  #tab   bindkey
                    287:     ['] (xins)       IS insert-char
1.39      anton     288:     ['] kill-prefix  IS everychar
1.44      anton     289:     ['] save-cursor  IS everyline
                    290:     ['] xback-restore IS back-restore
                    291: ;
1.39      anton     292: 
1.40      anton     293: xchar-history
1.19      anton     294: 
                    295: \ initializing history
                    296: 
                    297: : get-history ( addr len -- )
                    298:     ['] force-open catch
                    299:     ?dup-if
                    300:        \ !! >stderr
1.21      pazsan    301:         \ history-file type ." : " .error cr
1.49    ! pazsan    302:        drop 2drop 0 to history
1.19      anton     303:        ['] false ['] false ['] (ret)
                    304:     else
                    305:        to history
                    306:        history file-size throw
                    307:        2dup forward^ 2! 2dup backward^ 2! end^ 2!
                    308:        ['] next-line ['] prev-line ['] (enter)
                    309:     endif
1.27      pazsan    310:     dup #lf bindkey
                    311:         #cr bindkey
                    312:      ctrl P bindkey
                    313:      ctrl N bindkey
1.19      anton     314: ;
                    315: 
                    316: : history-cold ( -- )
1.42      pazsan    317:     history-file get-history xchar-history ;
1.19      anton     318: 
1.48      anton     319: :noname ( -- )
                    320:     defers 'cold
                    321:     history-cold
                    322: ; is 'cold
                    323: 
1.19      anton     324: history-cold
                    325: 

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