Annotation of gforth/history.fs, revision 1.62

1.11      pazsan      1: \ command line edit and history support                 16oct94py
1.4       pazsan      2: 
1.50      anton       3: \ Copyright (C) 1995,2000,2003,2004,2005,2006 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 -- )
1.55      pazsan     73: defer cur-correct ( addr u -- )
                     74: ' backspaces IS back-restore
                     75: ' 2drop IS cur-correct
1.44      anton      76: 
1.47      pazsan     77: [IFDEF] x-width
1.4       pazsan     78: : clear-line ( max span addr pos1 -- max addr )
1.46      pazsan     79:   back-restore over over swap x-width spaces swap back-restore ;
1.47      pazsan     80: [ELSE]
                     81: : clear-line ( max span addr pos1 -- max addr )
                     82:   back-restore over spaces swap back-restore ;
                     83: [THEN]
1.41      anton      84: \ : clear-tib ( max span addr pos -- max 0 addr 0 false )
                     85: \   clear-line 0 tuck dup ;
1.4       pazsan     86: 
1.32      pazsan     87: : hist-pos    ( -- ud )  history file-position drop ( throw ) ;
                     88: : hist-setpos ( ud -- )  history reposition-file drop ( throw ) ;
1.4       pazsan     89: 
1.7       pazsan     90: : get-line ( addr len -- len' flag )
                     91:   swap history read-line throw ;
                     92: 
1.4       pazsan     93: : next-line  ( max span addr pos1 -- max span addr pos2 false )
                     94:   clear-line
1.7       pazsan     95:   forward^ 2@ 2dup hist-setpos backward^ 2!
                     96:   2dup get-line drop
                     97:   hist-pos  forward^ 2!
1.55      pazsan     98:   tuck 2dup type 2dup cur-correct 0 ;
1.4       pazsan     99: 
1.20      pazsan    100: : find-prev-line ( max addr -- max span addr pos2 )
                    101:   backward^ 2@ forward^ 2!
1.7       pazsan    102:   over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
                    103:   BEGIN
                    104:       backward^ 2!   2dup get-line  WHILE
                    105:       hist-pos 2dup forward^ 2@ d<  WHILE
                    106:       rot drop
1.20      pazsan    107:   REPEAT  2drop  THEN  tuck ;
                    108: 
                    109: : prev-line  ( max span addr pos1 -- max span addr pos2 false )
1.55      pazsan    110:     clear-line find-prev-line 2dup type 2dup cur-correct 0 ;
1.4       pazsan    111: 
1.41      anton     112: \ Create lfpad #lf c,
1.4       pazsan    113: 
                    114: : (enter)  ( max span addr pos1 -- max span addr pos2 true )
1.7       pazsan    115:   >r end^ 2@ hist-setpos
1.32      pazsan    116:   2dup swap history write-line drop ( throw ) \ don't worry about errors
1.7       pazsan    117:   hist-pos 2dup backward^ 2! end^ 2!
1.4       pazsan    118:   r> (ret) ;
                    119: 
                    120: : extract-word ( addr len -- addr' len' )  dup >r
                    121:   BEGIN  1- dup 0>=  WHILE  2dup + c@ bl =  UNTIL  THEN  1+
                    122:   tuck + r> rot - ;
                    123: 
                    124: Create prefix-found  0 , 0 ,
                    125: 
1.30      anton     126: : sgn ( n -- -1/0/1 )
                    127:  dup 0= IF EXIT THEN  0< 2* 1+ ;
                    128: 
                    129: : capscomp  ( c_addr1 u c_addr2 -- n )
                    130:  swap bounds
                    131:  ?DO  dup c@ I c@ <>
                    132:      IF  dup c@ toupper I c@ toupper =
                    133:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                    134:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                    135: 
1.4       pazsan    136: : word-lex ( nfa1 nfa2 -- -1/0/1 )
1.9       anton     137:     dup 0=
                    138:     IF
                    139:        2drop 1  EXIT
                    140:     THEN
                    141:     name>string 2>r name>string
                    142:     dup r@ =
                    143:     IF
                    144:        rdrop r> capscomp 0<= EXIT
                    145:     THEN
                    146:     r> <
                    147:     nip rdrop ;
1.4       pazsan    148: 
1.9       anton     149: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
                    150:     >r
                    151:     BEGIN
                    152:        dup
                    153:     WHILE
                    154:        >r dup r@ name>string nip <=
                    155:        IF
                    156:            2dup r@ name>string drop capscomp  0=
                    157:            IF
                    158:                r> dup r@ word-lex
                    159:                IF
                    160:                    dup prefix-found @ word-lex
                    161:                    0>=
                    162:                    IF
                    163:                        rdrop dup >r
                    164:                    THEN
                    165:                THEN
                    166:                >r
1.7       pazsan    167:            THEN
1.9       anton     168:        THEN
                    169:        r> @
                    170:     REPEAT
                    171:     drop r> ;
1.7       pazsan    172: 
1.35      pazsan    173: : prefix-off ( -- )  0 0 prefix-found 2! ;
                    174: 
1.7       pazsan    175: : prefix-string ( addr len nfa -- addr' len' )
                    176:     dup prefix-found !  ?dup
1.9       anton     177:     IF
                    178:        name>string rot /string rot drop
1.7       pazsan    179:        dup 1+ prefix-found cell+ !
                    180:     ELSE
1.35      pazsan    181:        2drop s" " prefix-off
1.7       pazsan    182:     THEN ;
                    183: 
                    184: : search-prefix  ( addr1 len1 -- addr2 len2 )
                    185:     0 vp dup @ 1- cells over +
                    186:     DO  I 2@ <>
1.17      pazsan    187:         IF  I cell+ @ wordlist-id @ swap  search-voc  THEN
1.7       pazsan    188:        [ -1 cells ] Literal +LOOP
                    189:     prefix-string ;
                    190: 
                    191: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
                    192:     5 pick over 4 pick + prefix-found @ 0<> - < ;
1.4       pazsan    193: 
                    194: : kill-prefix  ( key -- key )
1.36      pazsan    195:   dup #tab <> IF  prefix-off  THEN ;
1.33      pazsan    196: 
                    197: \ UTF-8 support
                    198: 
1.38      anton     199: require utf-8.fs
1.33      pazsan    200: 
1.39      anton     201: [IFUNDEF] #esc  27 Constant #esc  [THEN]
                    202: 
1.51      pazsan    203: Variable curpos
1.58      pazsan    204: Variable screenw
1.51      pazsan    205: 
1.62    ! pazsan    206: : at-deltaxy ( dx dy -- )
        !           207:     #esc emit '[ emit  dup abs 0 .r 0< IF  'A  ELSE  'B  THEN  emit
        !           208:     #esc emit '[ emit  dup abs 0 .r 0< IF  'D  ELSE  'C  THEN  emit ;
        !           209: 
1.55      pazsan    210: : cygwin? ( -- flag ) s" TERM" getenv s" cygwin" str= ;
                    211: : at-xy? ( -- x y )
1.60      pazsan    212:     key? drop \ make sure prep_terminal() is executed
1.55      pazsan    213:     #esc emit ." [6n"  0 0
                    214:     BEGIN  key dup 'R <>  WHILE
                    215:            dup '; = IF  drop  swap  ELSE
                    216:                dup '0 '9 1+ within  IF  '0 - swap 10 * +  ELSE
                    217:                    drop  THEN  THEN
                    218:     REPEAT  drop 1- swap 1- ;
1.58      pazsan    219: : cursor@ ( -- n )  at-xy? screenw @ * + ;
                    220: : cursor! ( n -- )  screenw @ /mod at-xy ;
1.55      pazsan    221: : xcur-correct  ( addr u -- )
1.57      pazsan    222:     cygwin? curpos @ -1 = or  IF  2drop EXIT  THEN
1.55      pazsan    223:     x-width curpos @ + cursor@ -
1.58      pazsan    224:     screenw @ >r  r@ 2/ + r@ / r> * negate curpos +! ;
1.55      pazsan    225: : save-cursor ( -- )
1.56      pazsan    226:     cygwin? IF  #esc emit '7 emit  ELSE
1.58      pazsan    227:        key? IF  -1  ELSE  form nip screenw ! cursor@  THEN  curpos !  THEN ;
1.55      pazsan    228: : restore-cursor ( -- )
1.56      pazsan    229:     cygwin? IF  #esc emit '8 emit  ELSE
                    230:        curpos @ dup -1 = IF  drop  ELSE   cursor!  THEN  THEN ;
                    231: 
1.55      pazsan    232: ' xcur-correct IS cur-correct
                    233: 
1.39      anton     234: : .rest ( addr pos1 -- addr pos1 )
1.53      pazsan    235:     key? ?EXIT
1.51      pazsan    236:     restore-cursor 2dup type 2dup cur-correct ;
1.39      anton     237: : .all ( span addr pos1 -- span addr pos1 )
1.53      pazsan    238:     key? ?EXIT
1.51      pazsan    239:     restore-cursor >r 2dup swap type 2dup swap cur-correct r> ;
1.44      anton     240: : xback-restore ( u -- )
1.53      pazsan    241:     drop key? ?EXIT
                    242:     restore-cursor ;
1.44      anton     243: 
1.58      pazsan    244: : xretype ( max span addr pos1 -- max span addr pos1 )
                    245:     restore-cursor screenw @ >r save-cursor
1.59      pazsan    246:     .all 2 pick r@ / screenw @ r> - * 0 max spaces .rest false ;
1.58      pazsan    247: 
1.44      anton     248: \ In the following, addr max is the buffer, addr span is the current
                    249: \ string in the buffer, and pos1 is the cursor position in the buffer.
1.39      anton     250: 
1.40      anton     251: : <xins>  ( max span addr pos1 xc -- max span addr pos2 )
                    252:     >r  2over r@ xc-size + u< IF  ( max span addr pos1 R:xc )
                    253:        rdrop bell  EXIT  THEN
                    254:     >string over r@ xc-size + swap move
                    255:     2dup chars + r@ swap r@ xc-size xc!+? 2drop drop
                    256:     r> xc-size >r  rot r@ chars + -rot r> chars + ;
                    257: : (xins)  ( max span addr pos1 xc -- max span addr pos2 )
1.52      pazsan    258:     <xins> .all .rest ;
1.40      anton     259: : xback  ( max span addr pos1 -- max span addr pos2 f )
                    260:     dup  IF  over + xchar- over -  0 max .all .rest
1.39      anton     261:     ELSE  bell  THEN 0 ;
1.40      anton     262: : xforw  ( max span addr pos1 -- max span addr pos2 f )
                    263:     2 pick over <> IF  over + xc@+ xemit over -  ELSE  bell  THEN 0 ;
                    264: : (xdel)  ( max span addr pos1 -- max span addr pos2 )
                    265:     over + dup xchar- tuck - >r over -
1.39      anton     266:     >string over r@ + -rot move
                    267:     rot r> - -rot ;
1.40      anton     268: : ?xdel ( max span addr pos1 -- max span addr pos2 0 )
                    269:   dup  IF  (xdel) .all 2 spaces .rest  THEN  0 ;
                    270: : <xdel> ( max span addr pos1 -- max span addr pos2 0 )
1.39      anton     271:   2 pick over <>
1.40      anton     272:     IF  xforw drop (xdel) .all 2 spaces .rest
1.39      anton     273:     ELSE  bell  THEN  0 ;
1.40      anton     274: : xeof  2 pick over or 0=  IF  bye  ELSE  <xdel>  THEN ;
1.39      anton     275: 
1.40      anton     276: : xfirst-pos  ( max span addr pos1 -- max span addr 0 0 )
1.39      anton     277:   drop 0 .all .rest 0 ;
1.40      anton     278: : xend-pos  ( max span addr pos1 -- max span addr span 0 )
1.39      anton     279:   drop over .all 0 ;
                    280: 
                    281: 
1.40      anton     282: : xclear-line ( max span addr pos1 -- max addr )
1.39      anton     283:     drop restore-cursor swap spaces restore-cursor ;
1.40      anton     284: : xclear-tib ( max span addr pos -- max 0 addr 0 false )
                    285:     xclear-line 0 tuck dup ;
1.39      anton     286: 
1.40      anton     287: : (xenter)  ( max span addr pos1 -- max span addr pos2 true )
1.39      anton     288:     >r end^ 2@ hist-setpos
                    289:     2dup swap history write-line drop ( throw ) \ don't worry about errors
                    290:     hist-pos 2dup backward^ 2! end^ 2!
1.56      pazsan    291:     r> curpos @ -1 = key? or IF
                    292:        >r 2dup swap type r>
                    293:     ELSE
                    294:        .all
                    295:     THEN space true ;
1.39      anton     296: 
1.40      anton     297: : xkill-expand ( max span addr pos1 -- max span addr pos2 )
1.39      anton     298:     prefix-found cell+ @ ?dup IF  >r
                    299:        r@ - >string over r@ + -rot move
                    300:        rot r@ - -rot .all r> spaces .rest THEN ;
                    301: 
                    302: : insert   ( string length buffer size -- )
                    303:     rot over min >r  r@ - ( left over )
                    304:     over dup r@ +  rot move   r> move  ;
                    305: 
1.40      anton     306: : xtab-expand ( max span addr pos1 -- max span addr pos2 0 )
                    307:     key? IF  #tab (xins) 0  EXIT  THEN
                    308:     xkill-expand 2dup extract-word dup 0= IF  nip EXIT  THEN
1.39      anton     309:     search-prefix tib-full?
1.40      anton     310:     IF    bell  2drop  prefix-off
1.39      anton     311:     ELSE  dup >r
                    312:        2>r >string r@ + 2r> 2swap insert
                    313:        r@ + rot r> + -rot
                    314:     THEN
1.40      anton     315:     prefix-found @ IF  bl (xins)  ELSE  .all .rest  THEN  0 ;
1.39      anton     316: 
1.40      anton     317: : xchar-history ( -- )
                    318:     ['] xforw        ctrl F bindkey
                    319:     ['] xback        ctrl B bindkey
                    320:     ['] ?xdel        ctrl H bindkey
                    321:     ['] xeof         ctrl D bindkey
                    322:     ['] <xdel>       ctrl X bindkey
                    323:     ['] xclear-tib   ctrl K bindkey
                    324:     ['] xfirst-pos   ctrl A bindkey
                    325:     ['] xend-pos     ctrl E bindkey
1.61      pazsan    326:     ['] xretype      ctrl L bindkey
1.49      pazsan    327:     history IF  ['] (xenter)     #lf    bindkey  THEN
                    328:     history IF  ['] (xenter)     #cr    bindkey  THEN
1.40      anton     329:     ['] xtab-expand  #tab   bindkey
                    330:     ['] (xins)       IS insert-char
1.39      anton     331:     ['] kill-prefix  IS everychar
1.44      anton     332:     ['] save-cursor  IS everyline
                    333:     ['] xback-restore IS back-restore
1.55      pazsan    334:     ['] xcur-correct  IS cur-correct
1.44      anton     335: ;
1.39      anton     336: 
1.40      anton     337: xchar-history
1.19      anton     338: 
                    339: \ initializing history
                    340: 
                    341: : get-history ( addr len -- )
                    342:     ['] force-open catch
                    343:     ?dup-if
                    344:        \ !! >stderr
1.21      pazsan    345:         \ history-file type ." : " .error cr
1.49      pazsan    346:        drop 2drop 0 to history
1.19      anton     347:        ['] false ['] false ['] (ret)
                    348:     else
                    349:        to history
                    350:        history file-size throw
                    351:        2dup forward^ 2! 2dup backward^ 2! end^ 2!
                    352:        ['] next-line ['] prev-line ['] (enter)
                    353:     endif
1.27      pazsan    354:     dup #lf bindkey
                    355:         #cr bindkey
                    356:      ctrl P bindkey
                    357:      ctrl N bindkey
1.19      anton     358: ;
                    359: 
                    360: : history-cold ( -- )
1.42      pazsan    361:     history-file get-history xchar-history ;
1.19      anton     362: 
1.48      anton     363: :noname ( -- )
                    364:     defers 'cold
                    365:     history-cold
                    366: ; is 'cold
                    367: 
1.19      anton     368: history-cold
                    369: 

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