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\ command line edit and history support 16oct94py
\ Copyright (C) 1995,2000,2003,2004,2005,2006,2007,2008 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 3
\ 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, see http://www.gnu.org/licenses/.
: ctrl-i ( "<char>" -- c )
char toupper $40 xor ;
' ctrl-i
:noname
ctrl-i postpone Literal ;
interpret/compile: ctrl ( "<char>" -- ctrl-code )
\ command line editing 16oct94py
: >string ( span addr pos1 -- span addr pos1 addr2 len )
over 3 pick 2 pick chars /string ;
: 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
defer back-restore ( u -- )
defer cur-correct ( addr u -- )
' backspaces IS back-restore
' 2drop IS cur-correct
Variable linew
Variable screenw
: linew-off linew off cols screenw ! ;
[IFDEF] x-width
: clear-line ( max span addr pos1 -- max addr )
drop linew @ back-restore over over swap x-width
dup spaces back-restore nip linew off ;
[ELSE]
: clear-line ( max span addr pos1 -- max addr )
back-restore over spaces swap back-restore ;
[THEN]
\ : 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 2dup cur-correct 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 2dup cur-correct 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) ;
: 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 ;
: tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
5 pick over 4 pick + prefix-found @ 0<> - < ;
: kill-prefix ( key -- key )
dup #tab <> IF prefix-off THEN ;
\ UTF-8 support
require utf-8.fs
[IFUNDEF] #esc 27 Constant #esc [THEN]
: at-deltaxy ( dx dy -- )
over 0< over 0= and IF drop abs backspaces EXIT THEN
base @ >r decimal
?dup IF
#esc emit '[ emit dup abs 0 .r 0< IF 'A ELSE 'B THEN emit
THEN
?dup IF
#esc emit '[ emit dup abs 0 .r 0< IF 'D ELSE 'C THEN emit
THEN r> base ! ;
\ : cygwin? ( -- flag ) s" TERM" getenv s" cygwin" str= ;
\ : at-xy? ( -- x y )
\ key? drop \ make sure prep_terminal() is executed
\ #esc emit ." [6n" 0 0
\ BEGIN key dup 'R <> WHILE
\ dup '; = IF drop swap ELSE
\ dup '0 '9 1+ within IF '0 - swap 10 * + ELSE
\ drop THEN THEN
\ REPEAT drop 1- swap 1- ;
\ : cursor@ ( -- n ) at-xy? screenw @ * + ;
\ : cursor! ( n -- ) screenw @ /mod at-xy ;
: xcur-correct ( addr u -- ) x-width linew ! ;
' xcur-correct IS cur-correct
: xback-restore ( u -- )
screenw @ /mod negate swap negate swap at-deltaxy ;
: .rest ( addr pos1 -- addr pos1 )
linew @ xback-restore 2dup type 2dup cur-correct ;
: .all ( span addr pos1 -- span addr pos1 )
linew @ xback-restore >r 2dup swap type 2dup swap cur-correct r> ;
: xretype ( max span addr pos1 -- max span addr pos1 f )
.all cols screenw @ >r screenw !
linew @ screenw @ / linew @ r@ / max
screenw @ r> - * 0 max
dup spaces linew +! .rest false ;
\ In the following, addr max is the buffer, addr span is the current
\ string in the buffer, and pos1 is the cursor position in the buffer.
: <xins> ( 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 )
<xins> key? 0= IF .all .rest THEN ;
: 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
2dup cur-correct 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 2 linew +! .rest THEN 0 ;
: <xdel> ( max span addr pos1 -- max span addr pos2 0 )
2 pick over <>
IF xforw drop (xdel) .all 2 spaces 2 linew +! .rest
ELSE bell THEN 0 ;
: xeof 2 pick over or 0= IF bye ELSE <xdel> 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 )
2dup x-width dup xback-restore dup spaces xback-restore drop nip ;
: 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 r> back-restore .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
['] <xdel> ctrl X bindkey
['] xclear-tib ctrl K bindkey
['] xfirst-pos ctrl A bindkey
['] xend-pos ctrl E bindkey
['] xretype ctrl L bindkey
history IF ['] (xenter) #lf bindkey THEN
history IF ['] (xenter) #cr bindkey THEN
['] xtab-expand #tab bindkey
['] (xins) IS insert-char
['] kill-prefix IS everychar
[ifdef] everyline
['] linew-off IS everyline
[endif]
['] xback-restore IS back-restore
['] xcur-correct IS cur-correct
;
xchar-history
\ initializing history
: get-history ( addr len -- )
['] force-open catch
?dup-if
\ !! >stderr
\ history-file type ." : " .error cr
drop 2drop 0 to history
['] 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 xchar-history ;
:noname ( -- )
defers 'cold
history-cold
; is 'cold
history-cold
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