File:  [gforth] / gforth / history.fs
Revision 1.46: download - view: text, annotated - select for diffs
Sun Feb 19 17:27:12 2006 UTC (15 years, 3 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Added x-width
Further r8c work

    1: \ command line edit and history support                 16oct94py
    2: 
    3: \ Copyright (C) 1995,2000,2003,2004,2005 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: 
   32: : bindkey ( xt key -- )  cells ctrlkeys + ! ;
   33: 
   34: \ history support                                       16oct94py
   35: 
   36: 0 Value history \ history file fid
   37: 
   38: 2Variable forward^
   39: 2Variable backward^
   40: 2Variable end^
   41: 
   42: : force-open ( addr len -- fid )
   43:     2dup r/w open-file
   44:     IF
   45: 	drop r/w create-file throw
   46:     ELSE
   47: 	nip nip
   48:     THEN ;
   49: 
   50: s" os-class" environment? [IF] s" unix" str= [ELSE] true [THEN] 
   51: [IF]
   52: : history-file ( -- addr u )
   53:     s" GFORTHHIST" getenv dup 0= IF
   54: 	2drop s" ~/.gforth-history"
   55:     THEN ;
   56: [ELSE]
   57: 
   58: : history-dir ( -- addr u )
   59:   s" TMP" getenv ?dup ?EXIT drop
   60:   s" TEMP" getenv ?dup ?EXIT drop
   61:   s" c:/" ;
   62: 
   63: : history-file ( -- addr u )
   64:   s" GFORTHHIST" getenv ?dup ?EXIT
   65:   drop
   66:   history-dir pad place
   67:   s" /ghist.fs" pad +place pad count ;
   68: [THEN]
   69: 
   70: \ moving in history file                               16oct94py
   71: 
   72: defer back-restore ( u -- )
   73: ' backspaces is back-restore
   74: 
   75: : clear-line ( max span addr pos1 -- max addr )
   76:   back-restore over over swap x-width spaces swap back-restore ;
   77: 
   78: \ : clear-tib ( max span addr pos -- max 0 addr 0 false )
   79: \   clear-line 0 tuck dup ;
   80: 
   81: : hist-pos    ( -- ud )  history file-position drop ( throw ) ;
   82: : hist-setpos ( ud -- )  history reposition-file drop ( throw ) ;
   83: 
   84: : get-line ( addr len -- len' flag )
   85:   swap history read-line throw ;
   86: 
   87: : next-line  ( max span addr pos1 -- max span addr pos2 false )
   88:   clear-line
   89:   forward^ 2@ 2dup hist-setpos backward^ 2!
   90:   2dup get-line drop
   91:   hist-pos  forward^ 2!
   92:   tuck 2dup type 0 ;
   93: 
   94: : find-prev-line ( max addr -- max span addr pos2 )
   95:   backward^ 2@ forward^ 2!
   96:   over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
   97:   BEGIN
   98:       backward^ 2!   2dup get-line  WHILE
   99:       hist-pos 2dup forward^ 2@ d<  WHILE
  100:       rot drop
  101:   REPEAT  2drop  THEN  tuck ;
  102: 
  103: : prev-line  ( max span addr pos1 -- max span addr pos2 false )
  104:     clear-line find-prev-line 2dup type 0 ;
  105: 
  106: \ Create lfpad #lf c,
  107: 
  108: : (enter)  ( max span addr pos1 -- max span addr pos2 true )
  109:   >r end^ 2@ hist-setpos
  110:   2dup swap history write-line drop ( throw ) \ don't worry about errors
  111:   hist-pos 2dup backward^ 2! end^ 2!
  112:   r> (ret) ;
  113: 
  114: : extract-word ( addr len -- addr' len' )  dup >r
  115:   BEGIN  1- dup 0>=  WHILE  2dup + c@ bl =  UNTIL  THEN  1+
  116:   tuck + r> rot - ;
  117: 
  118: Create prefix-found  0 , 0 ,
  119: 
  120: : sgn ( n -- -1/0/1 )
  121:  dup 0= IF EXIT THEN  0< 2* 1+ ;
  122: 
  123: : capscomp  ( c_addr1 u c_addr2 -- n )
  124:  swap bounds
  125:  ?DO  dup c@ I c@ <>
  126:      IF  dup c@ toupper I c@ toupper =
  127:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
  128:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
  129: 
  130: : word-lex ( nfa1 nfa2 -- -1/0/1 )
  131:     dup 0=
  132:     IF
  133: 	2drop 1  EXIT
  134:     THEN
  135:     name>string 2>r name>string
  136:     dup r@ =
  137:     IF
  138: 	rdrop r> capscomp 0<= EXIT
  139:     THEN
  140:     r> <
  141:     nip rdrop ;
  142: 
  143: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
  144:     >r
  145:     BEGIN
  146: 	dup
  147:     WHILE
  148: 	>r dup r@ name>string nip <=
  149: 	IF
  150: 	    2dup r@ name>string drop capscomp  0=
  151: 	    IF
  152: 		r> dup r@ word-lex
  153: 		IF
  154: 		    dup prefix-found @ word-lex
  155: 		    0>=
  156: 		    IF
  157: 			rdrop dup >r
  158: 		    THEN
  159: 		THEN
  160: 		>r
  161: 	    THEN
  162: 	THEN
  163: 	r> @
  164:     REPEAT
  165:     drop r> ;
  166: 
  167: : prefix-off ( -- )  0 0 prefix-found 2! ;
  168: 
  169: : prefix-string ( addr len nfa -- addr' len' )
  170:     dup prefix-found !  ?dup
  171:     IF
  172: 	name>string rot /string rot drop
  173: 	dup 1+ prefix-found cell+ !
  174:     ELSE
  175: 	2drop s" " prefix-off
  176:     THEN ;
  177: 
  178: : search-prefix  ( addr1 len1 -- addr2 len2 )
  179:     0 vp dup @ 1- cells over +
  180:     DO  I 2@ <>
  181:         IF  I cell+ @ wordlist-id @ swap  search-voc  THEN
  182: 	[ -1 cells ] Literal +LOOP
  183:     prefix-string ;
  184: 
  185: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
  186:     5 pick over 4 pick + prefix-found @ 0<> - < ;
  187: 
  188: : kill-prefix  ( key -- key )
  189:   dup #tab <> IF  prefix-off  THEN ;
  190: 
  191: \ UTF-8 support
  192: 
  193: require utf-8.fs
  194: 
  195: [IFUNDEF] #esc  27 Constant #esc  [THEN]
  196: 
  197: : save-cursor ( -- )  #esc emit '7 emit ;
  198: : restore-cursor ( -- )  #esc emit '8 emit ;
  199: : .rest ( addr pos1 -- addr pos1 )
  200:     restore-cursor 2dup type ;
  201: : .all ( span addr pos1 -- span addr pos1 )
  202:     restore-cursor >r 2dup swap type r> ;
  203: : xback-restore ( u -- )
  204:     drop restore-cursor ;
  205: 
  206: \ In the following, addr max is the buffer, addr span is the current
  207: \ string in the buffer, and pos1 is the cursor position in the buffer.
  208: 
  209: : <xins>  ( max span addr pos1 xc -- max span addr pos2 )
  210:     >r  2over r@ xc-size + u< IF  ( max span addr pos1 R:xc )
  211: 	rdrop bell  EXIT  THEN
  212:     >string over r@ xc-size + swap move
  213:     2dup chars + r@ swap r@ xc-size xc!+? 2drop drop
  214:     r> xc-size >r  rot r@ chars + -rot r> chars + ;
  215: : (xins)  ( max span addr pos1 xc -- max span addr pos2 )
  216:     <xins> .all .rest ;
  217: : xback  ( max span addr pos1 -- max span addr pos2 f )
  218:     dup  IF  over + xchar- over -  0 max .all .rest
  219:     ELSE  bell  THEN 0 ;
  220: : xforw  ( max span addr pos1 -- max span addr pos2 f )
  221:     2 pick over <> IF  over + xc@+ xemit over -  ELSE  bell  THEN 0 ;
  222: : (xdel)  ( max span addr pos1 -- max span addr pos2 )
  223:     over + dup xchar- tuck - >r over -
  224:     >string over r@ + -rot move
  225:     rot r> - -rot ;
  226: : ?xdel ( max span addr pos1 -- max span addr pos2 0 )
  227:   dup  IF  (xdel) .all 2 spaces .rest  THEN  0 ;
  228: : <xdel> ( max span addr pos1 -- max span addr pos2 0 )
  229:   2 pick over <>
  230:     IF  xforw drop (xdel) .all 2 spaces .rest
  231:     ELSE  bell  THEN  0 ;
  232: : xeof  2 pick over or 0=  IF  bye  ELSE  <xdel>  THEN ;
  233: 
  234: : xfirst-pos  ( max span addr pos1 -- max span addr 0 0 )
  235:   drop 0 .all .rest 0 ;
  236: : xend-pos  ( max span addr pos1 -- max span addr span 0 )
  237:   drop over .all 0 ;
  238: 
  239: 
  240: : xclear-line ( max span addr pos1 -- max addr )
  241:     drop restore-cursor swap spaces restore-cursor ;
  242: : xclear-tib ( max span addr pos -- max 0 addr 0 false )
  243:     xclear-line 0 tuck dup ;
  244: 
  245: : (xenter)  ( max span addr pos1 -- max span addr pos2 true )
  246:     >r end^ 2@ hist-setpos
  247:     2dup swap history write-line drop ( throw ) \ don't worry about errors
  248:     hist-pos 2dup backward^ 2! end^ 2!
  249:     r> .all space true ;
  250: 
  251: : xkill-expand ( max span addr pos1 -- max span addr pos2 )
  252:     prefix-found cell+ @ ?dup IF  >r
  253: 	r@ - >string over r@ + -rot move
  254: 	rot r@ - -rot .all r> spaces .rest THEN ;
  255: 
  256: : insert   ( string length buffer size -- )
  257:     rot over min >r  r@ - ( left over )
  258:     over dup r@ +  rot move   r> move  ;
  259: 
  260: : xtab-expand ( max span addr pos1 -- max span addr pos2 0 )
  261:     key? IF  #tab (xins) 0  EXIT  THEN
  262:     xkill-expand 2dup extract-word dup 0= IF  nip EXIT  THEN
  263:     search-prefix tib-full?
  264:     IF    bell  2drop  prefix-off
  265:     ELSE  dup >r
  266: 	2>r >string r@ + 2r> 2swap insert
  267: 	r@ + rot r> + -rot
  268:     THEN
  269:     prefix-found @ IF  bl (xins)  ELSE  .all .rest  THEN  0 ;
  270: 
  271: : xchar-history ( -- )
  272:     ['] xforw        ctrl F bindkey
  273:     ['] xback        ctrl B bindkey
  274:     ['] ?xdel        ctrl H bindkey
  275:     ['] xeof         ctrl D bindkey
  276:     ['] <xdel>       ctrl X bindkey
  277:     ['] xclear-tib   ctrl K bindkey
  278:     ['] xfirst-pos   ctrl A bindkey
  279:     ['] xend-pos     ctrl E bindkey
  280:     ['] (xenter)     #lf    bindkey
  281:     ['] (xenter)     #cr    bindkey
  282:     ['] xtab-expand  #tab   bindkey
  283:     ['] (xins)       IS insert-char
  284:     ['] kill-prefix  IS everychar
  285:     ['] save-cursor  IS everyline
  286:     ['] xback-restore IS back-restore
  287: ;
  288: 
  289: xchar-history
  290: 
  291: \ initializing history
  292: 
  293: : get-history ( addr len -- )
  294:     ['] force-open catch
  295:     ?dup-if
  296: 	\ !! >stderr
  297:         \ history-file type ." : " .error cr
  298: 	drop 2drop
  299: 	['] false ['] false ['] (ret)
  300:     else
  301: 	to history
  302: 	history file-size throw
  303: 	2dup forward^ 2! 2dup backward^ 2! end^ 2!
  304: 	['] next-line ['] prev-line ['] (enter)
  305:     endif
  306:     dup #lf bindkey
  307:         #cr bindkey
  308:      ctrl P bindkey
  309:      ctrl N bindkey
  310: ;
  311: 
  312: : history-cold ( -- )
  313:     history-file get-history xchar-history ;
  314: 
  315: ' history-cold INIT8 chained
  316: history-cold
  317: 

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