\ command line edit and history support 16oct94py \ Copyright (C) 1995,2000,2003,2004 Free Software Foundation, Inc. \ This file is part of Gforth. \ Gforth is free software; you can redistribute it and/or \ modify it under the terms of the GNU General Public License \ as published by the Free Software Foundation; either version 2 \ of the License, or (at your option) any later version. \ This program is distributed in the hope that it will be useful, \ but WITHOUT ANY WARRANTY; without even the implied warranty of \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the \ GNU General Public License for more details. \ You should have received a copy of the GNU General Public License \ along with this program; if not, write to the Free Software \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. :noname char [char] @ - ; :noname char [char] @ - postpone Literal ; interpret/compile: ctrl ( "" -- ctrl-code ) \ command line editing 16oct94py : >string ( span addr pos1 -- span addr pos1 addr2 len ) over 3 pick 2 pick chars /string ; : type-rest ( span addr pos1 -- span addr pos1 back ) >string tuck type ; : (del) ( max span addr pos1 -- max span addr pos2 ) 1- >string over 1+ -rot move rot 1- -rot #bs emit type-rest bl emit 1+ backspaces ; : (ins) ( max span addr pos1 char -- max span addr pos2 ) >r >string over 1+ swap move 2dup chars + r> swap c! rot 1+ -rot type-rest 1- backspaces 1+ ; : ?del ( max span addr pos1 -- max span addr pos2 0 ) dup IF (del) THEN 0 ; : (ret) type-rest drop true space ; : back dup IF 1- #bs emit ELSE #bell emit THEN 0 ; : forw 2 pick over <> IF 2dup + c@ emit 1+ ELSE #bell emit THEN 0 ; : ( max span addr pos1 -- max span addr pos2 0 ) 2 pick over <> IF forw drop (del) ELSE #bell emit THEN 0 ; : eof 2 pick over or 0= IF bye ELSE THEN ; : bindkey ( xt key -- ) cells ctrlkeys + ! ; \ history support 16oct94py 0 Value history \ history file fid 2Variable forward^ 2Variable backward^ 2Variable end^ : force-open ( addr len -- fid ) 2dup r/w open-file IF drop r/w create-file throw ELSE nip nip THEN ; s" os-class" environment? [IF] s" unix" str= [ELSE] true [THEN] [IF] : history-file ( -- addr u ) s" GFORTHHIST" getenv dup 0= IF 2drop s" ~/.gforth-history" THEN ; [ELSE] : history-dir ( -- addr u ) s" TMP" getenv ?dup ?EXIT drop s" TEMP" getenv ?dup ?EXIT drop s" c:/" ; : history-file ( -- addr u ) s" GFORTHHIST" getenv ?dup ?EXIT drop history-dir pad place s" /ghist.fs" pad +place pad count ; [THEN] \ moving in history file 16oct94py : clear-line ( max span addr pos1 -- max addr ) backspaces over spaces swap backspaces ; : clear-tib ( max span addr pos -- max 0 addr 0 false ) clear-line 0 tuck dup ; : hist-pos ( -- ud ) history file-position drop ( throw ) ; : hist-setpos ( ud -- ) history reposition-file drop ( throw ) ; : get-line ( addr len -- len' flag ) swap history read-line throw ; : next-line ( max span addr pos1 -- max span addr pos2 false ) clear-line forward^ 2@ 2dup hist-setpos backward^ 2! 2dup get-line drop hist-pos forward^ 2! tuck 2dup type 0 ; : find-prev-line ( max addr -- max span addr pos2 ) backward^ 2@ forward^ 2! over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos BEGIN backward^ 2! 2dup get-line WHILE hist-pos 2dup forward^ 2@ d< WHILE rot drop REPEAT 2drop THEN tuck ; : prev-line ( max span addr pos1 -- max span addr pos2 false ) clear-line find-prev-line 2dup type 0 ; Create lfpad #lf c, : (enter) ( max span addr pos1 -- max span addr pos2 true ) >r end^ 2@ hist-setpos 2dup swap history write-line drop ( throw ) \ don't worry about errors hist-pos 2dup backward^ 2! end^ 2! r> (ret) ; \ some other key commands 16oct94py : first-pos ( max span addr pos1 -- max span addr 0 0 ) backspaces 0 0 ; : end-pos ( max span addr pos1 -- max span addr span 0 ) type-rest 2drop over 0 ; : extract-word ( addr len -- addr' len' ) dup >r BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+ tuck + r> rot - ; Create prefix-found 0 , 0 , : sgn ( n -- -1/0/1 ) dup 0= IF EXIT THEN 0< 2* 1+ ; : capscomp ( c_addr1 u c_addr2 -- n ) swap bounds ?DO dup c@ I c@ <> IF dup c@ toupper I c@ toupper = ELSE true THEN WHILE 1+ LOOP drop 0 ELSE c@ toupper I c@ toupper - unloop THEN sgn ; : word-lex ( nfa1 nfa2 -- -1/0/1 ) dup 0= IF 2drop 1 EXIT THEN name>string 2>r name>string dup r@ = IF rdrop r> capscomp 0<= EXIT THEN r> < nip rdrop ; : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 ) >r BEGIN dup WHILE >r dup r@ name>string nip <= IF 2dup r@ name>string drop capscomp 0= IF r> dup r@ word-lex IF dup prefix-found @ word-lex 0>= IF rdrop dup >r THEN THEN >r THEN THEN r> @ REPEAT drop r> ; : prefix-off ( -- ) 0 0 prefix-found 2! ; : prefix-string ( addr len nfa -- addr' len' ) dup prefix-found ! ?dup IF name>string rot /string rot drop dup 1+ prefix-found cell+ ! ELSE 2drop s" " prefix-off THEN ; : search-prefix ( addr1 len1 -- addr2 len2 ) 0 vp dup @ 1- cells over + DO I 2@ <> IF I cell+ @ wordlist-id @ swap search-voc THEN [ -1 cells ] Literal +LOOP prefix-string ; : kill-expand ( max span addr pos1 -- max span addr pos2 ) prefix-found cell+ @ 0 ?DO (del) LOOP ; : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag ) 5 pick over 4 pick + prefix-found @ 0<> - < ; : tab-expand ( max span addr pos1 -- max span addr pos2 0 ) key? IF #tab (ins) 0 EXIT THEN kill-expand 2dup extract-word dup 0= IF nip EXIT THEN search-prefix tib-full? IF 7 emit 2drop 0 0 prefix-found 2! ELSE bounds ?DO I c@ (ins) LOOP THEN prefix-found @ IF bl (ins) THEN 0 ; : kill-prefix ( key -- key ) dup #tab <> IF prefix-off THEN ; [IFUNDEF] everyline defer everyline [THEN] : char-history ( -- ) \ might be useful on dumb terminals, otherwise unused ['] forw ctrl F bindkey ['] back ctrl B bindkey ['] ?del ctrl H bindkey ['] eof ctrl D bindkey ['] ctrl X bindkey ['] next-line ctrl N bindkey ['] prev-line ctrl P bindkey ['] clear-tib ctrl K bindkey ['] first-pos ctrl A bindkey ['] end-pos ctrl E bindkey ['] (enter) #lf bindkey ['] (enter) #cr bindkey ['] tab-expand #tab bindkey ['] (ins) IS insert-char ['] kill-prefix IS everychar ['] noop IS everyline ; \ UTF-8 support require utf-8.fs [IFUNDEF] #esc 27 Constant #esc [THEN] : save-cursor ( -- ) #esc emit '7 emit ; : restore-cursor ( -- ) #esc emit '8 emit ; : .rest ( addr pos1 -- addr pos1 ) restore-cursor 2dup type ; : .all ( span addr pos1 -- span addr pos1 ) restore-cursor >r 2dup swap type r> ; : ( max span addr pos1 xc -- max span addr pos2 ) >r 2over r@ xc-size + u< IF ( max span addr pos1 R:xc ) rdrop bell EXIT THEN >string over r@ xc-size + swap move 2dup chars + r@ swap r@ xc-size xc!+? 2drop drop r> xc-size >r rot r@ chars + -rot r> chars + ; : (xins) ( max span addr pos1 xc -- max span addr pos2 ) .all .rest ; : xback ( max span addr pos1 -- max span addr pos2 f ) dup IF over + xchar- over - 0 max .all .rest ELSE bell THEN 0 ; : xforw ( max span addr pos1 -- max span addr pos2 f ) 2 pick over <> IF over + xc@+ xemit over - ELSE bell THEN 0 ; : (xdel) ( max span addr pos1 -- max span addr pos2 ) over + dup xchar- tuck - >r over - >string over r@ + -rot move rot r> - -rot ; : ?xdel ( max span addr pos1 -- max span addr pos2 0 ) dup IF (xdel) .all 2 spaces .rest THEN 0 ; : ( max span addr pos1 -- max span addr pos2 0 ) 2 pick over <> IF xforw drop (xdel) .all 2 spaces .rest ELSE bell THEN 0 ; : xeof 2 pick over or 0= IF bye ELSE THEN ; : xfirst-pos ( max span addr pos1 -- max span addr 0 0 ) drop 0 .all .rest 0 ; : xend-pos ( max span addr pos1 -- max span addr span 0 ) drop over .all 0 ; : xclear-line ( max span addr pos1 -- max addr ) drop restore-cursor swap spaces restore-cursor ; : xclear-tib ( max span addr pos -- max 0 addr 0 false ) xclear-line 0 tuck dup ; : (xenter) ( max span addr pos1 -- max span addr pos2 true ) >r end^ 2@ hist-setpos 2dup swap history write-line drop ( throw ) \ don't worry about errors hist-pos 2dup backward^ 2! end^ 2! r> .all space true ; : xkill-expand ( max span addr pos1 -- max span addr pos2 ) prefix-found cell+ @ ?dup IF >r r@ - >string over r@ + -rot move rot r@ - -rot .all r> spaces .rest THEN ; : insert ( string length buffer size -- ) rot over min >r r@ - ( left over ) over dup r@ + rot move r> move ; : xtab-expand ( max span addr pos1 -- max span addr pos2 0 ) key? IF #tab (xins) 0 EXIT THEN xkill-expand 2dup extract-word dup 0= IF nip EXIT THEN search-prefix tib-full? IF bell 2drop prefix-off ELSE dup >r 2>r >string r@ + 2r> 2swap insert r@ + rot r> + -rot THEN prefix-found @ IF bl (xins) ELSE .all .rest THEN 0 ; : xchar-history ( -- ) ['] xforw ctrl F bindkey ['] xback ctrl B bindkey ['] ?xdel ctrl H bindkey ['] xeof ctrl D bindkey ['] ctrl X bindkey ['] xclear-tib ctrl K bindkey ['] xfirst-pos ctrl A bindkey ['] xend-pos ctrl E bindkey ['] (xenter) #lf bindkey ['] (xenter) #cr bindkey ['] xtab-expand #tab bindkey ['] (xins) IS insert-char ['] kill-prefix IS everychar ['] save-cursor IS everyline ; xchar-history \ initializing history : get-history ( addr len -- ) ['] force-open catch ?dup-if \ !! >stderr \ history-file type ." : " .error cr drop 2drop ['] false ['] false ['] (ret) else to history history file-size throw 2dup forward^ 2! 2dup backward^ 2! end^ 2! ['] next-line ['] prev-line ['] (enter) endif dup #lf bindkey #cr bindkey ctrl P bindkey ctrl N bindkey ; : history-cold ( -- ) history-file get-history ; ' history-cold INIT8 chained history-cold