1: \ command line edit and history support 16oct94py
2:
3: \ Copyright (C) 1995,2000,2003,2004,2005,2006 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: defer cur-correct ( addr u -- )
74: ' backspaces IS back-restore
75: ' 2drop IS cur-correct
76:
77: [IFDEF] x-width
78: : clear-line ( max span addr pos1 -- max addr )
79: back-restore over over swap x-width spaces swap back-restore ;
80: [ELSE]
81: : clear-line ( max span addr pos1 -- max addr )
82: back-restore over spaces swap back-restore ;
83: [THEN]
84: \ : clear-tib ( max span addr pos -- max 0 addr 0 false )
85: \ clear-line 0 tuck dup ;
86:
87: : hist-pos ( -- ud ) history file-position drop ( throw ) ;
88: : hist-setpos ( ud -- ) history reposition-file drop ( throw ) ;
89:
90: : get-line ( addr len -- len' flag )
91: swap history read-line throw ;
92:
93: : next-line ( max span addr pos1 -- max span addr pos2 false )
94: clear-line
95: forward^ 2@ 2dup hist-setpos backward^ 2!
96: 2dup get-line drop
97: hist-pos forward^ 2!
98: tuck 2dup type 2dup cur-correct 0 ;
99:
100: : find-prev-line ( max addr -- max span addr pos2 )
101: backward^ 2@ forward^ 2!
102: over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
103: BEGIN
104: backward^ 2! 2dup get-line WHILE
105: hist-pos 2dup forward^ 2@ d< WHILE
106: rot drop
107: REPEAT 2drop THEN tuck ;
108:
109: : prev-line ( max span addr pos1 -- max span addr pos2 false )
110: clear-line find-prev-line 2dup type 2dup cur-correct 0 ;
111:
112: \ Create lfpad #lf c,
113:
114: : (enter) ( max span addr pos1 -- max span addr pos2 true )
115: >r end^ 2@ hist-setpos
116: 2dup swap history write-line drop ( throw ) \ don't worry about errors
117: hist-pos 2dup backward^ 2! end^ 2!
118: r> (ret) ;
119:
120: : extract-word ( addr len -- addr' len' ) dup >r
121: BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+
122: tuck + r> rot - ;
123:
124: Create prefix-found 0 , 0 ,
125:
126: : sgn ( n -- -1/0/1 )
127: dup 0= IF EXIT THEN 0< 2* 1+ ;
128:
129: : capscomp ( c_addr1 u c_addr2 -- n )
130: swap bounds
131: ?DO dup c@ I c@ <>
132: IF dup c@ toupper I c@ toupper =
133: ELSE true THEN WHILE 1+ LOOP drop 0
134: ELSE c@ toupper I c@ toupper - unloop THEN sgn ;
135:
136: : word-lex ( nfa1 nfa2 -- -1/0/1 )
137: dup 0=
138: IF
139: 2drop 1 EXIT
140: THEN
141: name>string 2>r name>string
142: dup r@ =
143: IF
144: rdrop r> capscomp 0<= EXIT
145: THEN
146: r> <
147: nip rdrop ;
148:
149: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
150: >r
151: BEGIN
152: dup
153: WHILE
154: >r dup r@ name>string nip <=
155: IF
156: 2dup r@ name>string drop capscomp 0=
157: IF
158: r> dup r@ word-lex
159: IF
160: dup prefix-found @ word-lex
161: 0>=
162: IF
163: rdrop dup >r
164: THEN
165: THEN
166: >r
167: THEN
168: THEN
169: r> @
170: REPEAT
171: drop r> ;
172:
173: : prefix-off ( -- ) 0 0 prefix-found 2! ;
174:
175: : prefix-string ( addr len nfa -- addr' len' )
176: dup prefix-found ! ?dup
177: IF
178: name>string rot /string rot drop
179: dup 1+ prefix-found cell+ !
180: ELSE
181: 2drop s" " prefix-off
182: THEN ;
183:
184: : search-prefix ( addr1 len1 -- addr2 len2 )
185: 0 vp dup @ 1- cells over +
186: DO I 2@ <>
187: IF I cell+ @ wordlist-id @ swap search-voc THEN
188: [ -1 cells ] Literal +LOOP
189: prefix-string ;
190:
191: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
192: 5 pick over 4 pick + prefix-found @ 0<> - < ;
193:
194: : kill-prefix ( key -- key )
195: dup #tab <> IF prefix-off THEN ;
196:
197: \ UTF-8 support
198:
199: require utf-8.fs
200:
201: [IFUNDEF] #esc 27 Constant #esc [THEN]
202:
203: Variable curpos
204:
205: : cygwin? ( -- flag ) s" TERM" getenv s" cygwin" str= ;
206: : at-xy? ( -- x y )
207: key? drop
208: #esc emit ." [6n" 0 0
209: BEGIN key dup 'R <> WHILE
210: dup '; = IF drop swap ELSE
211: dup '0 '9 1+ within IF '0 - swap 10 * + ELSE
212: drop THEN THEN
213: REPEAT drop 1- swap 1- ;
214: : cursor@ ( -- n ) at-xy? form nip * + ;
215: : cursor! ( n -- ) form nip /mod at-xy ;
216: : xcur-correct ( addr u -- )
217: cygwin? IF 2drop EXIT THEN
218: x-width curpos @ + cursor@ -
219: form nip >r r@ 2/ + r@ / r> * negate curpos +! ;
220: : save-cursor ( -- )
221: cygwin? IF #esc emit '7 emit ELSE
222: key? IF -1 ELSE cursor@ THEN curpos ! THEN ;
223: : restore-cursor ( -- )
224: cygwin? IF #esc emit '8 emit ELSE
225: curpos @ dup -1 = IF drop ELSE cursor! THEN THEN ;
226:
227: ' xcur-correct IS cur-correct
228:
229: : .rest ( addr pos1 -- addr pos1 )
230: key? ?EXIT
231: restore-cursor 2dup type 2dup cur-correct ;
232: : .all ( span addr pos1 -- span addr pos1 )
233: key? ?EXIT
234: restore-cursor >r 2dup swap type 2dup swap cur-correct r> ;
235: : xback-restore ( u -- )
236: drop key? ?EXIT
237: restore-cursor ;
238:
239: \ In the following, addr max is the buffer, addr span is the current
240: \ string in the buffer, and pos1 is the cursor position in the buffer.
241:
242: : <xins> ( max span addr pos1 xc -- max span addr pos2 )
243: >r 2over r@ xc-size + u< IF ( max span addr pos1 R:xc )
244: rdrop bell EXIT THEN
245: >string over r@ xc-size + swap move
246: 2dup chars + r@ swap r@ xc-size xc!+? 2drop drop
247: r> xc-size >r rot r@ chars + -rot r> chars + ;
248: : (xins) ( max span addr pos1 xc -- max span addr pos2 )
249: <xins> .all .rest ;
250: : xback ( max span addr pos1 -- max span addr pos2 f )
251: dup IF over + xchar- over - 0 max .all .rest
252: ELSE bell THEN 0 ;
253: : xforw ( max span addr pos1 -- max span addr pos2 f )
254: 2 pick over <> IF over + xc@+ xemit over - ELSE bell THEN 0 ;
255: : (xdel) ( max span addr pos1 -- max span addr pos2 )
256: over + dup xchar- tuck - >r over -
257: >string over r@ + -rot move
258: rot r> - -rot ;
259: : ?xdel ( max span addr pos1 -- max span addr pos2 0 )
260: dup IF (xdel) .all 2 spaces .rest THEN 0 ;
261: : <xdel> ( max span addr pos1 -- max span addr pos2 0 )
262: 2 pick over <>
263: IF xforw drop (xdel) .all 2 spaces .rest
264: ELSE bell THEN 0 ;
265: : xeof 2 pick over or 0= IF bye ELSE <xdel> THEN ;
266:
267: : xfirst-pos ( max span addr pos1 -- max span addr 0 0 )
268: drop 0 .all .rest 0 ;
269: : xend-pos ( max span addr pos1 -- max span addr span 0 )
270: drop over .all 0 ;
271:
272:
273: : xclear-line ( max span addr pos1 -- max addr )
274: drop restore-cursor swap spaces restore-cursor ;
275: : xclear-tib ( max span addr pos -- max 0 addr 0 false )
276: xclear-line 0 tuck dup ;
277:
278: : (xenter) ( max span addr pos1 -- max span addr pos2 true )
279: >r end^ 2@ hist-setpos
280: 2dup swap history write-line drop ( throw ) \ don't worry about errors
281: hist-pos 2dup backward^ 2! end^ 2!
282: r> curpos @ -1 = key? or IF
283: >r 2dup swap type r>
284: ELSE
285: .all
286: THEN space true ;
287:
288: : xkill-expand ( max span addr pos1 -- max span addr pos2 )
289: prefix-found cell+ @ ?dup IF >r
290: r@ - >string over r@ + -rot move
291: rot r@ - -rot .all r> spaces .rest THEN ;
292:
293: : insert ( string length buffer size -- )
294: rot over min >r r@ - ( left over )
295: over dup r@ + rot move r> move ;
296:
297: : xtab-expand ( max span addr pos1 -- max span addr pos2 0 )
298: key? IF #tab (xins) 0 EXIT THEN
299: xkill-expand 2dup extract-word dup 0= IF nip EXIT THEN
300: search-prefix tib-full?
301: IF bell 2drop prefix-off
302: ELSE dup >r
303: 2>r >string r@ + 2r> 2swap insert
304: r@ + rot r> + -rot
305: THEN
306: prefix-found @ IF bl (xins) ELSE .all .rest THEN 0 ;
307:
308: : xchar-history ( -- )
309: ['] xforw ctrl F bindkey
310: ['] xback ctrl B bindkey
311: ['] ?xdel ctrl H bindkey
312: ['] xeof ctrl D bindkey
313: ['] <xdel> ctrl X bindkey
314: ['] xclear-tib ctrl K bindkey
315: ['] xfirst-pos ctrl A bindkey
316: ['] xend-pos ctrl E bindkey
317: history IF ['] (xenter) #lf bindkey THEN
318: history IF ['] (xenter) #cr bindkey THEN
319: ['] xtab-expand #tab bindkey
320: ['] (xins) IS insert-char
321: ['] kill-prefix IS everychar
322: ['] save-cursor IS everyline
323: ['] xback-restore IS back-restore
324: ['] xcur-correct IS cur-correct
325: ;
326:
327: xchar-history
328:
329: \ initializing history
330:
331: : get-history ( addr len -- )
332: ['] force-open catch
333: ?dup-if
334: \ !! >stderr
335: \ history-file type ." : " .error cr
336: drop 2drop 0 to history
337: ['] false ['] false ['] (ret)
338: else
339: to history
340: history file-size throw
341: 2dup forward^ 2! 2dup backward^ 2! end^ 2!
342: ['] next-line ['] prev-line ['] (enter)
343: endif
344: dup #lf bindkey
345: #cr bindkey
346: ctrl P bindkey
347: ctrl N bindkey
348: ;
349:
350: : history-cold ( -- )
351: history-file get-history xchar-history ;
352:
353: :noname ( -- )
354: defers 'cold
355: history-cold
356: ; is 'cold
357:
358: history-cold
359:
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