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