1: \ command line edit and history support 16oct94py
2:
3: \ Copyright (C) 1995 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., 675 Mass Ave, Cambridge, MA 02139, 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: : type-rest ( span addr pos1 -- span addr pos1 back )
32: >string tuck type ;
33: : (del) ( max span addr pos1 -- max span addr pos2 )
34: 1- >string over 1+ -rot move
35: rot 1- -rot #bs emit type-rest bl emit 1+ backspaces ;
36: : (ins) ( max span addr pos1 char -- max span addr pos2 )
37: >r >string over 1+ swap move 2dup chars + r> swap c!
38: rot 1+ -rot type-rest 1- backspaces 1+ ;
39: : ?del ( max span addr pos1 -- max span addr pos2 0 )
40: dup IF (del) THEN 0 ;
41: : (ret) type-rest drop true space ;
42: : back dup IF 1- #bs emit ELSE #bell emit THEN 0 ;
43: : forw 2 pick over <> IF 2dup + c@ emit 1+ ELSE #bell emit THEN 0 ;
44: : eof 2 pick over or 0= IF
45: bye
46: ELSE 2 pick over <>
47: IF forw drop (del) ELSE #bell emit THEN 0
48: THEN ;
49:
50: ' forw ctrl F cells ctrlkeys + !
51: ' back ctrl B cells ctrlkeys + !
52: ' ?del ctrl H cells ctrlkeys + !
53: ' eof ctrl D cells ctrlkeys + !
54:
55: ' (ins) IS insert-char
56:
57: \ history support 16oct94py
58:
59: 0 Value history \ history file fid
60:
61: 2Variable forward^
62: 2Variable backward^
63: 2Variable end^
64:
65: : force-open ( addr len -- fid )
66: 2dup r/w open-file
67: IF
68: drop r/w create-file throw
69: ELSE
70: nip nip
71: THEN ;
72:
73: s" os-class" environment? [IF] s" unix" compare 0= [ELSE] true [THEN]
74: [IF]
75: : history-file ( -- addr u )
76: s" GFORTHHIST" getenv dup 0= IF
77: 2drop s" ~/.gforth-history"
78: THEN ;
79: [ELSE]
80:
81: : history-dir ( -- addr u )
82: s" TMP" getenv ?dup ?EXIT drop
83: s" TEMP" getenv ?dup ?EXIT drop
84: s" c:/" ;
85:
86: : history-file ( -- addr u )
87: s" GFORTHHIST" getenv ?dup ?EXIT
88: drop
89: history-dir pad place
90: s" /ghist.fs" pad +place pad count ;
91: [THEN]
92:
93: \ moving in history file 16oct94py
94:
95: : clear-line ( max span addr pos1 -- max addr )
96: backspaces over spaces swap backspaces ;
97:
98: : clear-tib ( max span addr pos -- max 0 addr 0 false )
99: clear-line 0 tuck dup ;
100:
101: : hist-pos ( -- ud ) history file-position throw ;
102: : hist-setpos ( ud -- ) history reposition-file throw ;
103:
104: : get-line ( addr len -- len' flag )
105: swap history read-line throw ;
106:
107: : next-line ( max span addr pos1 -- max span addr pos2 false )
108: clear-line
109: forward^ 2@ 2dup hist-setpos backward^ 2!
110: 2dup get-line drop
111: hist-pos forward^ 2!
112: tuck 2dup type 0 ;
113:
114: : prev-line ( max span addr pos1 -- max span addr pos2 false )
115: clear-line backward^ 2@ forward^ 2!
116: over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
117: BEGIN
118: backward^ 2! 2dup get-line WHILE
119: hist-pos 2dup forward^ 2@ d< WHILE
120: rot drop
121: REPEAT 2drop THEN
122: tuck 2dup type 0 ;
123:
124: Create lfpad #lf c,
125:
126: : (enter) ( max span addr pos1 -- max span addr pos2 true )
127: >r end^ 2@ hist-setpos
128: 2dup swap history write-line throw
129: hist-pos 2dup backward^ 2! end^ 2!
130: r> (ret) ;
131:
132: \ some other key commands 16oct94py
133:
134: : first-pos ( max span addr pos1 -- max span addr 0 0 )
135: backspaces 0 0 ;
136: : end-pos ( max span addr pos1 -- max span addr span 0 )
137: type-rest 2drop over 0 ;
138:
139: : extract-word ( addr len -- addr' len' ) dup >r
140: BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+
141: tuck + r> rot - ;
142:
143: Create prefix-found 0 , 0 ,
144:
145: : word-lex ( nfa1 nfa2 -- -1/0/1 )
146: dup 0=
147: IF
148: 2drop 1 EXIT
149: THEN
150: name>string 2>r name>string
151: dup r@ =
152: IF
153: rdrop r> capscomp 0<= EXIT
154: THEN
155: r> <
156: nip rdrop ;
157:
158: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
159: >r
160: BEGIN
161: dup
162: WHILE
163: >r dup r@ name>string nip <=
164: IF
165: 2dup r@ name>string drop capscomp 0=
166: IF
167: r> dup r@ word-lex
168: IF
169: dup prefix-found @ word-lex
170: 0>=
171: IF
172: rdrop dup >r
173: THEN
174: THEN
175: >r
176: THEN
177: THEN
178: r> @
179: REPEAT
180: drop r> ;
181:
182: : prefix-string ( addr len nfa -- addr' len' )
183: dup prefix-found ! ?dup
184: IF
185: name>string rot /string rot drop
186: dup 1+ prefix-found cell+ !
187: ELSE
188: 2drop s" " prefix-found cell+ off
189: THEN ;
190:
191: : search-prefix ( addr1 len1 -- addr2 len2 )
192: 0 vp dup @ 1- cells over +
193: DO I 2@ <>
194: IF I cell+ @ wordlist-id @ swap search-voc THEN
195: [ -1 cells ] Literal +LOOP
196: prefix-string ;
197:
198: : kill-expand ( max span addr pos1 -- max span addr pos2 )
199: prefix-found cell+ @ 0 ?DO (del) LOOP ;
200:
201: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
202: 5 pick over 4 pick + prefix-found @ 0<> - < ;
203:
204: : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
205: kill-expand 2dup extract-word search-prefix
206: tib-full?
207: IF 7 emit 2drop 0 0 prefix-found 2!
208: ELSE bounds ?DO I c@ (ins) LOOP THEN
209: prefix-found @ IF bl (ins) THEN 0 ;
210:
211: : kill-prefix ( key -- key )
212: dup #tab <> IF 0 0 prefix-found 2! THEN ;
213:
214: ' kill-prefix IS everychar
215:
216: ' next-line ctrl N cells ctrlkeys + !
217: ' prev-line ctrl P cells ctrlkeys + !
218: ' clear-tib ctrl K cells ctrlkeys + !
219: ' first-pos ctrl A cells ctrlkeys + !
220: ' end-pos ctrl E cells ctrlkeys + !
221: ' (enter) #lf cells ctrlkeys + !
222: ' (enter) #cr cells ctrlkeys + !
223: ' tab-expand #tab cells ctrlkeys + !
224:
225: \ initializing history
226:
227: : get-history ( addr len -- )
228: ['] force-open catch
229: ?dup-if
230: \ !! >stderr
231: history-file type ." : " .error cr 2drop
232: ['] false ['] false ['] (ret)
233: else
234: to history
235: history file-size throw
236: 2dup forward^ 2! 2dup backward^ 2! end^ 2!
237: ['] next-line ['] prev-line ['] (enter)
238: endif
239: dup
240: [ #lf cells ctrlkeys + ]L !
241: [ #cr cells ctrlkeys + ]L !
242: [ ctrl P cells ctrlkeys + ]L !
243: [ ctrl N cells ctrlkeys + ]L !
244: ;
245:
246: : history-cold ( -- )
247: history-file get-history ;
248:
249: ' history-cold INIT8 chained
250: history-cold
251:
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