File:  [gforth] / gforth / history.fs
Revision 1.26: download - view: text, annotated - select for diffs
Sat Sep 23 15:46:57 2000 UTC (20 years, 8 months ago) by anton
Branches: MAIN
CVS tags: v0-5-0, HEAD
changed FSF address in copyright messages

    1: \ command line edit and history support                 16oct94py
    2: 
    3: \ Copyright (C) 1995,2000 Free Software Foundation, Inc.
    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
   19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   20: 
   21: :noname
   22:     char [char] @ - ;
   23: :noname
   24:     char [char] @ - postpone Literal ;
   25: interpret/compile: ctrl  ( "<char>" -- ctrl-code )
   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 ;
   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 ;
   48: 
   49: ' forw  ctrl F cells ctrlkeys + !
   50: ' back  ctrl B cells ctrlkeys + !
   51: ' ?del  ctrl H cells ctrlkeys + !
   52: ' eof   ctrl D cells ctrlkeys + !
   53: ' <del> ctrl X cells ctrlkeys + !
   54: 
   55: ' (ins) IS insert-char
   56: 
   57: \ history support                                       16oct94py
   58: 
   59: 0 Value history \ history file fid
   60: 
   61: 2Variable forward^
   62: 2Variable backward^
   63: 2Variable end^
   64: 
   65: : force-open ( addr len -- fid )
   66:     2dup r/w open-file
   67:     IF
   68: 	drop r/w create-file throw
   69:     ELSE
   70: 	nip nip
   71:     THEN ;
   72: 
   73: s" os-class" environment? [IF] s" unix" compare 0= [ELSE] true [THEN] 
   74: [IF]
   75: : history-file ( -- addr u )
   76:     s" GFORTHHIST" getenv dup 0= IF
   77: 	2drop s" ~/.gforth-history"
   78:     THEN ;
   79: [ELSE]
   80: 
   81: : history-dir ( -- addr u )
   82:   s" TMP" getenv ?dup ?EXIT drop
   83:   s" TEMP" getenv ?dup ?EXIT drop
   84:   s" c:/" ;
   85: 
   86: : history-file ( -- addr u )
   87:   s" GFORTHHIST" getenv ?dup ?EXIT
   88:   drop
   89:   history-dir pad place
   90:   s" /ghist.fs" pad +place pad count ;
   91: [THEN]
   92: 
   93: \ moving in history file                               16oct94py
   94: 
   95: : clear-line ( max span addr pos1 -- max addr )
   96:   backspaces over spaces swap backspaces ;
   97: 
   98: : clear-tib ( max span addr pos -- max 0 addr 0 false )
   99:   clear-line 0 tuck dup ;
  100: 
  101: : hist-pos    ( -- ud )  history file-position throw ;
  102: : hist-setpos ( ud -- )  history reposition-file throw ;
  103: 
  104: : get-line ( addr len -- len' flag )
  105:   swap history read-line throw ;
  106: 
  107: : next-line  ( max span addr pos1 -- max span addr pos2 false )
  108:   clear-line
  109:   forward^ 2@ 2dup hist-setpos backward^ 2!
  110:   2dup get-line drop
  111:   hist-pos  forward^ 2!
  112:   tuck 2dup type 0 ;
  113: 
  114: : find-prev-line ( max addr -- max span addr pos2 )
  115:   backward^ 2@ forward^ 2!
  116:   over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
  117:   BEGIN
  118:       backward^ 2!   2dup get-line  WHILE
  119:       hist-pos 2dup forward^ 2@ d<  WHILE
  120:       rot drop
  121:   REPEAT  2drop  THEN  tuck ;
  122: 
  123: : prev-line  ( max span addr pos1 -- max span addr pos2 false )
  124:     clear-line find-prev-line 2dup type 0 ;
  125: 
  126: Create lfpad #lf c,
  127: 
  128: : (enter)  ( max span addr pos1 -- max span addr pos2 true )
  129:   >r end^ 2@ hist-setpos
  130:   2dup swap history write-line throw
  131:   hist-pos 2dup backward^ 2! end^ 2!
  132:   r> (ret) ;
  133: 
  134: \ some other key commands                              16oct94py
  135: 
  136: : first-pos  ( max span addr pos1 -- max span addr 0 0 )
  137:   backspaces 0 0 ;
  138: : end-pos  ( max span addr pos1 -- max span addr span 0 )
  139:   type-rest 2drop over 0 ;
  140: 
  141: : extract-word ( addr len -- addr' len' )  dup >r
  142:   BEGIN  1- dup 0>=  WHILE  2dup + c@ bl =  UNTIL  THEN  1+
  143:   tuck + r> rot - ;
  144: 
  145: Create prefix-found  0 , 0 ,
  146: 
  147: : word-lex ( nfa1 nfa2 -- -1/0/1 )
  148:     dup 0=
  149:     IF
  150: 	2drop 1  EXIT
  151:     THEN
  152:     name>string 2>r name>string
  153:     dup r@ =
  154:     IF
  155: 	rdrop r> capscomp 0<= EXIT
  156:     THEN
  157:     r> <
  158:     nip rdrop ;
  159: 
  160: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
  161:     >r
  162:     BEGIN
  163: 	dup
  164:     WHILE
  165: 	>r dup r@ name>string nip <=
  166: 	IF
  167: 	    2dup r@ name>string drop capscomp  0=
  168: 	    IF
  169: 		r> dup r@ word-lex
  170: 		IF
  171: 		    dup prefix-found @ word-lex
  172: 		    0>=
  173: 		    IF
  174: 			rdrop dup >r
  175: 		    THEN
  176: 		THEN
  177: 		>r
  178: 	    THEN
  179: 	THEN
  180: 	r> @
  181:     REPEAT
  182:     drop r> ;
  183: 
  184: : prefix-string ( addr len nfa -- addr' len' )
  185:     dup prefix-found !  ?dup
  186:     IF
  187: 	name>string rot /string rot drop
  188: 	dup 1+ prefix-found cell+ !
  189:     ELSE
  190: 	2drop s" " prefix-found cell+ off
  191:     THEN ;
  192: 
  193: : search-prefix  ( addr1 len1 -- addr2 len2 )
  194:     0 vp dup @ 1- cells over +
  195:     DO  I 2@ <>
  196:         IF  I cell+ @ wordlist-id @ swap  search-voc  THEN
  197: 	[ -1 cells ] Literal +LOOP
  198:     prefix-string ;
  199: 
  200: : kill-expand ( max span addr pos1 -- max span addr pos2 )
  201:     prefix-found cell+ @  0 ?DO  (del)  LOOP ;
  202: 
  203: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
  204:     5 pick over 4 pick + prefix-found @ 0<> - < ;
  205: 
  206: : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
  207:     kill-expand  2dup extract-word dup 0= IF  nip EXIT  THEN
  208:     search-prefix  tib-full?
  209:     IF    7 emit  2drop  0 0 prefix-found 2!
  210:     ELSE  bounds ?DO  I c@ (ins)  LOOP  THEN
  211:     prefix-found @ IF  bl (ins)  THEN  0 ;
  212: 
  213: : kill-prefix  ( key -- key )
  214:   dup #tab <> IF  0 0 prefix-found 2!  THEN ;
  215: 
  216: ' kill-prefix IS everychar
  217: 
  218: ' next-line  ctrl N cells ctrlkeys + !
  219: ' prev-line  ctrl P cells ctrlkeys + !
  220: ' clear-tib  ctrl K cells ctrlkeys + !
  221: ' first-pos  ctrl A cells ctrlkeys + !
  222: ' end-pos    ctrl E cells ctrlkeys + !
  223: ' (enter)    #lf    cells ctrlkeys + !
  224: ' (enter)    #cr    cells ctrlkeys + !
  225: ' tab-expand #tab   cells ctrlkeys + !
  226: 
  227: \ initializing history
  228: 
  229: : get-history ( addr len -- )
  230:     ['] force-open catch
  231:     ?dup-if
  232: 	\ !! >stderr
  233:         \ history-file type ." : " .error cr
  234: 	drop 2drop
  235: 	['] false ['] false ['] (ret)
  236:     else
  237: 	to history
  238: 	history file-size throw
  239: 	2dup forward^ 2! 2dup backward^ 2! end^ 2!
  240: 	['] next-line ['] prev-line ['] (enter)
  241:     endif
  242:     dup
  243:     [ #lf    cells ctrlkeys + ]L !
  244:     [ #cr    cells ctrlkeys + ]L !
  245:     [ ctrl P cells ctrlkeys + ]L !
  246:     [ ctrl N cells ctrlkeys + ]L !
  247: ;
  248: 
  249: : history-cold ( -- )
  250:     history-file get-history ;
  251: 
  252: ' history-cold INIT8 chained
  253: history-cold
  254: 

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