1: \ command line edit and history support 16oct94py
2:
3: \ Copyright (C) 1995,2000,2003,2004,2005,2006,2007,2008,2010 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 3
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, see http://www.gnu.org/licenses/.
19:
20: : ctrl-i ( "<char>" -- c )
21: char toupper $40 xor ;
22:
23: ' ctrl-i
24: :noname
25: ctrl-i postpone Literal ;
26: interpret/compile: ctrl ( "<char>" -- ctrl-code )
27:
28: \ command line editing 16oct94py
29:
30: : >string ( span addr pos1 -- span addr pos1 addr2 len )
31: over 3 pick 2 pick chars /string ;
32:
33: : bindkey ( xt key -- ) cells ctrlkeys + ! ;
34:
35: \ history support 16oct94py
36:
37: 0 Value history \ history file fid
38:
39: 2Variable forward^
40: 2Variable backward^
41: 2Variable end^
42:
43: : force-open ( addr len -- fid )
44: 2dup r/w open-file
45: IF
46: drop r/w create-file throw
47: ELSE
48: nip nip
49: THEN ;
50:
51: s" os-class" environment? [IF] s" unix" str= [ELSE] true [THEN]
52: [IF]
53: : history-file ( -- addr u )
54: s" GFORTHHIST" getenv dup 0= IF
55: 2drop s" ~/.gforth-history"
56: THEN ;
57: [ELSE]
58:
59: : history-dir ( -- addr u )
60: s" TMP" getenv ?dup ?EXIT drop
61: s" TEMP" getenv ?dup ?EXIT drop
62: s" c:/" ;
63:
64: : history-file ( -- addr u )
65: s" GFORTHHIST" getenv ?dup ?EXIT
66: drop
67: history-dir pad place
68: s" /ghist.fs" pad +place pad count ;
69: [THEN]
70:
71: \ moving in history file 16oct94py
72:
73: defer back-restore ( u -- )
74: defer cur-correct ( addr u -- )
75: ' backspaces IS back-restore
76: ' 2drop IS cur-correct
77:
78: Variable linew
79: Variable screenw
80: : linew-off linew off cols screenw ! ;
81:
82: [IFDEF] x-width
83: : clear-line ( max span addr pos1 -- max addr )
84: drop linew @ back-restore over over swap x-width
85: dup spaces back-restore nip linew off ;
86: [ELSE]
87: : clear-line ( max span addr pos1 -- max addr )
88: back-restore over spaces swap back-restore ;
89: [THEN]
90: \ : clear-tib ( max span addr pos -- max 0 addr 0 false )
91: \ clear-line 0 tuck dup ;
92:
93: : hist-pos ( -- ud ) history file-position drop ( throw ) ;
94: : hist-setpos ( ud -- ) history reposition-file drop ( throw ) ;
95:
96: : get-line ( addr len -- len' flag )
97: swap history read-line throw ;
98:
99: : next-line ( max span addr pos1 -- max span addr pos2 false )
100: clear-line
101: forward^ 2@ 2dup hist-setpos backward^ 2!
102: 2dup get-line drop
103: hist-pos forward^ 2!
104: tuck 2dup type 2dup cur-correct 0 ;
105:
106: : find-prev-line ( max addr -- max span addr pos2 )
107: backward^ 2@ forward^ 2!
108: over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
109: BEGIN
110: backward^ 2! 2dup get-line WHILE
111: hist-pos 2dup forward^ 2@ d< WHILE
112: rot drop
113: REPEAT 2drop THEN tuck ;
114:
115: : prev-line ( max span addr pos1 -- max span addr pos2 false )
116: clear-line find-prev-line 2dup type 2dup cur-correct 0 ;
117:
118: \ Create lfpad #lf c,
119:
120: : (enter) ( max span addr pos1 -- max span addr pos2 true )
121: >r end^ 2@ hist-setpos
122: 2dup swap history write-line drop ( throw ) \ don't worry about errors
123: hist-pos 2dup backward^ 2! end^ 2!
124: r> (ret) ;
125:
126: : extract-word ( addr len -- addr' len' ) dup >r
127: BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+
128: tuck + r> rot - ;
129:
130: Create prefix-found 0 , 0 ,
131:
132: : sgn ( n -- -1/0/1 )
133: dup 0= IF EXIT THEN 0< 2* 1+ ;
134:
135: : capscomp ( c_addr1 u c_addr2 -- n )
136: swap bounds
137: ?DO dup c@ I c@ <>
138: IF dup c@ toupper I c@ toupper =
139: ELSE true THEN WHILE 1+ LOOP drop 0
140: ELSE c@ toupper I c@ toupper - unloop THEN sgn ;
141:
142: : word-lex ( nfa1 nfa2 -- -1/0/1 )
143: dup 0=
144: IF
145: 2drop 1 EXIT
146: THEN
147: name>string 2>r name>string
148: dup r@ =
149: IF
150: rdrop r> capscomp 0<= EXIT
151: THEN
152: r> <
153: nip rdrop ;
154:
155: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
156: >r
157: BEGIN
158: dup
159: WHILE
160: >r dup r@ name>string nip <=
161: IF
162: 2dup r@ name>string drop capscomp 0=
163: IF
164: r> dup r@ word-lex
165: IF
166: dup prefix-found @ word-lex
167: 0>=
168: IF
169: rdrop dup >r
170: THEN
171: THEN
172: >r
173: THEN
174: THEN
175: r> @
176: REPEAT
177: drop r> ;
178:
179: : prefix-off ( -- ) 0 0 prefix-found 2! ;
180:
181: : prefix-string ( addr len nfa -- addr' len' )
182: dup prefix-found ! ?dup
183: IF
184: name>string rot /string rot drop
185: dup 1+ prefix-found cell+ !
186: ELSE
187: 2drop s" " prefix-off
188: THEN ;
189:
190: : search-prefix ( addr1 len1 -- addr2 len2 )
191: 0 vp dup @ 1- cells over +
192: DO I 2@ <>
193: IF I cell+ @ wordlist-id @ swap search-voc THEN
194: [ -1 cells ] Literal +LOOP
195: prefix-string ;
196:
197: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
198: 5 pick over 4 pick + prefix-found @ 0<> - < ;
199:
200: : kill-prefix ( key -- key )
201: dup #tab <> IF prefix-off THEN ;
202:
203: \ UTF-8 support
204:
205: require utf-8.fs
206:
207: [IFUNDEF] #esc 27 Constant #esc [THEN]
208:
209: : at-deltaxy ( dx dy -- )
210: over 0< over 0= and IF drop abs backspaces EXIT THEN
211: base @ >r decimal
212: ?dup IF
213: #esc emit '[ emit dup abs 0 .r 0< IF 'A ELSE 'B THEN emit
214: THEN
215: ?dup IF
216: #esc emit '[ emit dup abs 0 .r 0< IF 'D ELSE 'C THEN emit
217: THEN r> base ! ;
218:
219: \ : cygwin? ( -- flag ) s" TERM" getenv s" cygwin" str= ;
220: \ : at-xy? ( -- x y )
221: \ key? drop \ make sure prep_terminal() is executed
222: \ #esc emit ." [6n" 0 0
223: \ BEGIN key dup 'R <> WHILE
224: \ dup '; = IF drop swap ELSE
225: \ dup '0 '9 1+ within IF '0 - swap 10 * + ELSE
226: \ drop THEN THEN
227: \ REPEAT drop 1- swap 1- ;
228: \ : cursor@ ( -- n ) at-xy? screenw @ * + ;
229: \ : cursor! ( n -- ) screenw @ /mod at-xy ;
230: : xcur-correct ( addr u -- ) x-width linew ! ;
231:
232: ' xcur-correct IS cur-correct
233:
234: : xback-restore ( u -- )
235: screenw @ /mod negate swap negate swap at-deltaxy ;
236: : .rest ( addr pos1 -- addr pos1 )
237: linew @ xback-restore 2dup type 2dup cur-correct ;
238: : .all ( span addr pos1 -- span addr pos1 )
239: linew @ xback-restore >r 2dup swap type 2dup swap cur-correct r> ;
240:
241: : xretype ( max span addr pos1 -- max span addr pos1 f )
242: .all cols screenw @ >r screenw !
243: linew @ screenw @ / linew @ r@ / max
244: screenw @ r> - * 0 max
245: dup spaces linew +! .rest false ;
246:
247: \ In the following, addr max is the buffer, addr span is the current
248: \ string in the buffer, and pos1 is the cursor position in the buffer.
249:
250: : <xins> ( max span addr pos1 xc -- max span addr pos2 )
251: >r 2over r@ xc-size + u< IF ( max span addr pos1 R:xc )
252: rdrop bell EXIT THEN
253: >string over r@ xc-size + swap move
254: 2dup chars + r@ swap r@ xc-size xc!+? 2drop drop
255: r> xc-size >r rot r@ chars + -rot r> chars + ;
256: : (xins) ( max span addr pos1 xc -- max span addr pos2 )
257: <xins> key? 0= IF .all .rest THEN ;
258: : xback ( max span addr pos1 -- max span addr pos2 f )
259: dup IF over + xchar- over - 0 max .all .rest
260: ELSE bell THEN 0 ;
261: : xforw ( max span addr pos1 -- max span addr pos2 f )
262: 2 pick over <> IF over + xc@+ xemit over - ELSE bell THEN
263: 2dup cur-correct 0 ;
264: : (xdel) ( max span addr pos1 -- max span addr pos2 )
265: over + dup xchar- tuck - >r over -
266: >string over r@ + -rot move
267: rot r> - -rot ;
268: : ?xdel ( max span addr pos1 -- max span addr pos2 0 )
269: dup IF (xdel) .all 2 spaces 2 linew +! .rest THEN 0 ;
270: : <xdel> ( max span addr pos1 -- max span addr pos2 0 )
271: 2 pick over <>
272: IF xforw drop (xdel) .all 2 spaces 2 linew +! .rest
273: ELSE bell THEN 0 ;
274: : xeof 2 pick over or 0= IF bye ELSE <xdel> THEN ;
275:
276: : xfirst-pos ( max span addr pos1 -- max span addr 0 0 )
277: drop 0 .all .rest 0 ;
278: : xend-pos ( max span addr pos1 -- max span addr span 0 )
279: drop over .all 0 ;
280:
281: : xclear-rest ( max span addr pos -- max pos addr pos false )
282: rot >r tuck 2dup r> swap /string u8width dup spaces linew +! .all 0 ;
283:
284: : (xenter) ( max span addr pos1 -- max span addr pos2 true )
285: >r end^ 2@ hist-setpos
286: 2dup swap history write-line drop ( throw ) \ don't worry about errors
287: hist-pos 2dup backward^ 2! end^ 2!
288: r> .all space true ;
289:
290: : xkill-expand ( max span addr pos1 -- max span addr pos2 )
291: prefix-found cell+ @ ?dup IF >r
292: r@ - >string over r@ + -rot move
293: rot r@ - -rot .all r@ spaces r> back-restore .rest THEN ;
294:
295: : insert ( string length buffer size -- )
296: rot over min >r r@ - ( left over )
297: over dup r@ + rot move r> move ;
298:
299: : xtab-expand ( max span addr pos1 -- max span addr pos2 0 )
300: key? IF #tab (xins) 0 EXIT THEN
301: xkill-expand 2dup extract-word dup 0= IF nip EXIT THEN
302: search-prefix tib-full?
303: IF bell 2drop prefix-off
304: ELSE dup >r
305: 2>r >string r@ + 2r> 2swap insert
306: r@ + rot r> + -rot
307: THEN
308: prefix-found @ IF bl (xins) ELSE .all .rest THEN 0 ;
309:
310: : xchar-history ( -- )
311: ['] xforw ctrl F bindkey
312: ['] xback ctrl B bindkey
313: ['] ?xdel ctrl H bindkey
314: ['] xeof ctrl D bindkey
315: ['] <xdel> ctrl X bindkey
316: ['] xclear-rest ctrl K bindkey
317: ['] xfirst-pos ctrl A bindkey
318: ['] xend-pos ctrl E bindkey
319: ['] xretype ctrl L bindkey
320: history IF ['] (xenter) #lf bindkey THEN
321: history IF ['] (xenter) #cr bindkey THEN
322: ['] xtab-expand #tab bindkey
323: ['] (xins) IS insert-char
324: ['] kill-prefix IS everychar
325: [ifdef] everyline
326: ['] linew-off IS everyline
327: [endif]
328: ['] xback-restore IS back-restore
329: ['] xcur-correct IS cur-correct
330: ;
331:
332: xchar-history
333:
334: \ initializing history
335:
336: : get-history ( addr len -- )
337: ['] force-open catch
338: ?dup-if
339: \ !! >stderr
340: \ history-file type ." : " .error cr
341: drop 2drop 0 to history
342: ['] false ['] false ['] (ret)
343: else
344: to history
345: history file-size throw
346: 2dup forward^ 2! 2dup backward^ 2! end^ 2!
347: ['] next-line ['] prev-line ['] (enter)
348: endif
349: dup #lf bindkey
350: #cr bindkey
351: ctrl P bindkey
352: ctrl N bindkey
353: ;
354:
355: : history-cold ( -- )
356: history-file get-history xchar-history ;
357:
358: :noname ( -- )
359: defers 'cold
360: history-cold
361: ; is 'cold
362:
363: history-cold
364:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>