Annotation of gforth/history.fs, revision 1.36

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: 
1.11      pazsan     51: \ history support                                       16oct94py
                     52: 
1.13      anton      53: 0 Value history \ history file fid
1.4       pazsan     54: 
                     55: 2Variable forward^
                     56: 2Variable backward^
                     57: 2Variable end^
                     58: 
1.13      anton      59: : force-open ( addr len -- fid )
1.19      anton      60:     2dup r/w open-file
                     61:     IF
                     62:        drop r/w create-file throw
                     63:     ELSE
                     64:        nip nip
                     65:     THEN ;
1.4       pazsan     66: 
1.29      anton      67: s" os-class" environment? [IF] s" unix" str= [ELSE] true [THEN] 
1.15      jwilke     68: [IF]
1.16      pazsan     69: : history-file ( -- addr u )
1.14      pazsan     70:     s" GFORTHHIST" getenv dup 0= IF
                     71:        2drop s" ~/.gforth-history"
1.16      pazsan     72:     THEN ;
1.15      jwilke     73: [ELSE]
                     74: 
1.16      pazsan     75: : history-dir ( -- addr u )
1.15      jwilke     76:   s" TMP" getenv ?dup ?EXIT drop
                     77:   s" TEMP" getenv ?dup ?EXIT drop
                     78:   s" c:/" ;
                     79: 
1.16      pazsan     80: : history-file ( -- addr u )
1.15      jwilke     81:   s" GFORTHHIST" getenv ?dup ?EXIT
                     82:   drop
                     83:   history-dir pad place
1.16      pazsan     84:   s" /ghist.fs" pad +place pad count ;
                     85: [THEN]
1.15      jwilke     86: 
1.4       pazsan     87: \ moving in history file                               16oct94py
                     88: 
                     89: : clear-line ( max span addr pos1 -- max addr )
                     90:   backspaces over spaces swap backspaces ;
                     91: 
                     92: : clear-tib ( max span addr pos -- max 0 addr 0 false )
                     93:   clear-line 0 tuck dup ;
                     94: 
1.32      pazsan     95: : hist-pos    ( -- ud )  history file-position drop ( throw ) ;
                     96: : hist-setpos ( ud -- )  history reposition-file drop ( throw ) ;
1.4       pazsan     97: 
1.7       pazsan     98: : get-line ( addr len -- len' flag )
                     99:   swap history read-line throw ;
                    100: 
1.4       pazsan    101: : next-line  ( max span addr pos1 -- max span addr pos2 false )
                    102:   clear-line
1.7       pazsan    103:   forward^ 2@ 2dup hist-setpos backward^ 2!
                    104:   2dup get-line drop
                    105:   hist-pos  forward^ 2!
                    106:   tuck 2dup type 0 ;
1.4       pazsan    107: 
1.20      pazsan    108: : find-prev-line ( max addr -- max span addr pos2 )
                    109:   backward^ 2@ forward^ 2!
1.7       pazsan    110:   over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
                    111:   BEGIN
                    112:       backward^ 2!   2dup get-line  WHILE
                    113:       hist-pos 2dup forward^ 2@ d<  WHILE
                    114:       rot drop
1.20      pazsan    115:   REPEAT  2drop  THEN  tuck ;
                    116: 
                    117: : prev-line  ( max span addr pos1 -- max span addr pos2 false )
                    118:     clear-line find-prev-line 2dup type 0 ;
1.4       pazsan    119: 
                    120: Create lfpad #lf c,
                    121: 
                    122: : (enter)  ( max span addr pos1 -- max span addr pos2 true )
1.7       pazsan    123:   >r end^ 2@ hist-setpos
1.32      pazsan    124:   2dup swap history write-line drop ( throw ) \ don't worry about errors
1.7       pazsan    125:   hist-pos 2dup backward^ 2! end^ 2!
1.4       pazsan    126:   r> (ret) ;
                    127: 
                    128: \ some other key commands                              16oct94py
                    129: 
                    130: : first-pos  ( max span addr pos1 -- max span addr 0 0 )
                    131:   backspaces 0 0 ;
                    132: : end-pos  ( max span addr pos1 -- max span addr span 0 )
                    133:   type-rest 2drop over 0 ;
                    134: 
                    135: : extract-word ( addr len -- addr' len' )  dup >r
                    136:   BEGIN  1- dup 0>=  WHILE  2dup + c@ bl =  UNTIL  THEN  1+
                    137:   tuck + r> rot - ;
                    138: 
                    139: Create prefix-found  0 , 0 ,
                    140: 
1.30      anton     141: : sgn ( n -- -1/0/1 )
                    142:  dup 0= IF EXIT THEN  0< 2* 1+ ;
                    143: 
                    144: : capscomp  ( c_addr1 u c_addr2 -- n )
                    145:  swap bounds
                    146:  ?DO  dup c@ I c@ <>
                    147:      IF  dup c@ toupper I c@ toupper =
                    148:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                    149:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                    150: 
1.4       pazsan    151: : word-lex ( nfa1 nfa2 -- -1/0/1 )
1.9       anton     152:     dup 0=
                    153:     IF
                    154:        2drop 1  EXIT
                    155:     THEN
                    156:     name>string 2>r name>string
                    157:     dup r@ =
                    158:     IF
                    159:        rdrop r> capscomp 0<= EXIT
                    160:     THEN
                    161:     r> <
                    162:     nip rdrop ;
1.4       pazsan    163: 
1.9       anton     164: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
                    165:     >r
                    166:     BEGIN
                    167:        dup
                    168:     WHILE
                    169:        >r dup r@ name>string nip <=
                    170:        IF
                    171:            2dup r@ name>string drop capscomp  0=
                    172:            IF
                    173:                r> dup r@ word-lex
                    174:                IF
                    175:                    dup prefix-found @ word-lex
                    176:                    0>=
                    177:                    IF
                    178:                        rdrop dup >r
                    179:                    THEN
                    180:                THEN
                    181:                >r
1.7       pazsan    182:            THEN
1.9       anton     183:        THEN
                    184:        r> @
                    185:     REPEAT
                    186:     drop r> ;
1.7       pazsan    187: 
1.35      pazsan    188: : prefix-off ( -- )  0 0 prefix-found 2! ;
                    189: 
1.7       pazsan    190: : prefix-string ( addr len nfa -- addr' len' )
                    191:     dup prefix-found !  ?dup
1.9       anton     192:     IF
                    193:        name>string rot /string rot drop
1.7       pazsan    194:        dup 1+ prefix-found cell+ !
                    195:     ELSE
1.35      pazsan    196:        2drop s" " prefix-off
1.7       pazsan    197:     THEN ;
                    198: 
                    199: : search-prefix  ( addr1 len1 -- addr2 len2 )
                    200:     0 vp dup @ 1- cells over +
                    201:     DO  I 2@ <>
1.17      pazsan    202:         IF  I cell+ @ wordlist-id @ swap  search-voc  THEN
1.7       pazsan    203:        [ -1 cells ] Literal +LOOP
                    204:     prefix-string ;
                    205: 
                    206: : kill-expand ( max span addr pos1 -- max span addr pos2 )
                    207:     prefix-found cell+ @  0 ?DO  (del)  LOOP ;
                    208: 
                    209: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
                    210:     5 pick over 4 pick + prefix-found @ 0<> - < ;
1.4       pazsan    211: 
                    212: : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
1.28      pazsan    213:     key? IF  #tab (ins) 0  EXIT  THEN
1.23      pazsan    214:     kill-expand  2dup extract-word dup 0= IF  nip EXIT  THEN
                    215:     search-prefix  tib-full?
1.7       pazsan    216:     IF    7 emit  2drop  0 0 prefix-found 2!
                    217:     ELSE  bounds ?DO  I c@ (ins)  LOOP  THEN
                    218:     prefix-found @ IF  bl (ins)  THEN  0 ;
1.4       pazsan    219: 
                    220: : kill-prefix  ( key -- key )
1.36    ! pazsan    221:   dup #tab <> IF  prefix-off  THEN ;
1.4       pazsan    222: 
1.34      anton     223: [IFUNDEF] everyline defer everyline [THEN]
                    224: 
1.33      pazsan    225: : 8-bit-io ( -- )
                    226:     ['] forw        ctrl F bindkey
                    227:     ['] back        ctrl B bindkey
                    228:     ['] ?del        ctrl H bindkey
                    229:     ['] eof         ctrl D bindkey
                    230:     ['] <del>       ctrl X bindkey
                    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
                    239:     ['] (ins)       IS insert-char
                    240:     ['] kill-prefix IS everychar
                    241:     ['] noop        IS everyline
                    242:     [ action-of key ] Literal IS key
                    243:     [ action-of emit ] Literal IS emit ;
                    244: 
                    245: \ UTF-8 support
                    246: 
                    247: include utf-8.fs
                    248: 
                    249: : utf-8-cold ( -- )
                    250:     s" LANG" getenv s" .UTF-8" search nip nip
                    251:     IF  utf-8-io  ELSE  8-bit-io  THEN ;
                    252: 
                    253: ' utf-8-cold INIT8 chained
1.4       pazsan    254: 
1.33      pazsan    255: utf-8-cold
1.19      anton     256: 
                    257: \ initializing history
                    258: 
                    259: : get-history ( addr len -- )
                    260:     ['] force-open catch
                    261:     ?dup-if
                    262:        \ !! >stderr
1.21      pazsan    263:         \ history-file type ." : " .error cr
                    264:        drop 2drop
1.19      anton     265:        ['] false ['] false ['] (ret)
                    266:     else
                    267:        to history
                    268:        history file-size throw
                    269:        2dup forward^ 2! 2dup backward^ 2! end^ 2!
                    270:        ['] next-line ['] prev-line ['] (enter)
                    271:     endif
1.27      pazsan    272:     dup #lf bindkey
                    273:         #cr bindkey
                    274:      ctrl P bindkey
                    275:      ctrl N bindkey
1.19      anton     276: ;
                    277: 
                    278: : history-cold ( -- )
                    279:     history-file get-history ;
                    280: 
                    281: ' history-cold INIT8 chained
                    282: history-cold
                    283: 

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