1: \ command line edit and history support 16oct94py
2:
3: \ Copyright (C) 1995,2000 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: : 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: : <del> ( max span addr pos1 -- max span addr pos2 0 )
45: 2 pick over <>
46: IF forw drop (del) ELSE #bell emit THEN 0 ;
47: : eof 2 pick over or 0= IF bye ELSE <del> THEN ;
48:
49: : bindkey ( xt key -- ) cells ctrlkeys + ! ;
50:
51: ' forw ctrl F bindkey
52: ' back ctrl B bindkey
53: ' ?del ctrl H bindkey
54: ' eof ctrl D bindkey
55: ' <del> ctrl X bindkey
56:
57: ' (ins) IS insert-char
58:
59: \ history support 16oct94py
60:
61: 0 Value history \ history file fid
62:
63: 2Variable forward^
64: 2Variable backward^
65: 2Variable end^
66:
67: : force-open ( addr len -- fid )
68: 2dup r/w open-file
69: IF
70: drop r/w create-file throw
71: ELSE
72: nip nip
73: THEN ;
74:
75: s" os-class" environment? [IF] s" unix" compare 0= [ELSE] true [THEN]
76: [IF]
77: : history-file ( -- addr u )
78: s" GFORTHHIST" getenv dup 0= IF
79: 2drop s" ~/.gforth-history"
80: THEN ;
81: [ELSE]
82:
83: : history-dir ( -- addr u )
84: s" TMP" getenv ?dup ?EXIT drop
85: s" TEMP" getenv ?dup ?EXIT drop
86: s" c:/" ;
87:
88: : history-file ( -- addr u )
89: s" GFORTHHIST" getenv ?dup ?EXIT
90: drop
91: history-dir pad place
92: s" /ghist.fs" pad +place pad count ;
93: [THEN]
94:
95: \ moving in history file 16oct94py
96:
97: : clear-line ( max span addr pos1 -- max addr )
98: backspaces over spaces swap backspaces ;
99:
100: : clear-tib ( max span addr pos -- max 0 addr 0 false )
101: clear-line 0 tuck dup ;
102:
103: : hist-pos ( -- ud ) history file-position throw ;
104: : hist-setpos ( ud -- ) history reposition-file throw ;
105:
106: : get-line ( addr len -- len' flag )
107: swap history read-line throw ;
108:
109: : next-line ( max span addr pos1 -- max span addr pos2 false )
110: clear-line
111: forward^ 2@ 2dup hist-setpos backward^ 2!
112: 2dup get-line drop
113: hist-pos forward^ 2!
114: tuck 2dup type 0 ;
115:
116: : find-prev-line ( max addr -- max span addr pos2 )
117: backward^ 2@ forward^ 2!
118: over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
119: BEGIN
120: backward^ 2! 2dup get-line WHILE
121: hist-pos 2dup forward^ 2@ d< WHILE
122: rot drop
123: REPEAT 2drop THEN tuck ;
124:
125: : prev-line ( max span addr pos1 -- max span addr pos2 false )
126: clear-line find-prev-line 2dup type 0 ;
127:
128: Create lfpad #lf c,
129:
130: : (enter) ( max span addr pos1 -- max span addr pos2 true )
131: >r end^ 2@ hist-setpos
132: 2dup swap history write-line throw
133: hist-pos 2dup backward^ 2! end^ 2!
134: r> (ret) ;
135:
136: \ some other key commands 16oct94py
137:
138: : first-pos ( max span addr pos1 -- max span addr 0 0 )
139: backspaces 0 0 ;
140: : end-pos ( max span addr pos1 -- max span addr span 0 )
141: type-rest 2drop over 0 ;
142:
143: : extract-word ( addr len -- addr' len' ) dup >r
144: BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+
145: tuck + r> rot - ;
146:
147: Create prefix-found 0 , 0 ,
148:
149: : word-lex ( nfa1 nfa2 -- -1/0/1 )
150: dup 0=
151: IF
152: 2drop 1 EXIT
153: THEN
154: name>string 2>r name>string
155: dup r@ =
156: IF
157: rdrop r> capscomp 0<= EXIT
158: THEN
159: r> <
160: nip rdrop ;
161:
162: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
163: >r
164: BEGIN
165: dup
166: WHILE
167: >r dup r@ name>string nip <=
168: IF
169: 2dup r@ name>string drop capscomp 0=
170: IF
171: r> dup r@ word-lex
172: IF
173: dup prefix-found @ word-lex
174: 0>=
175: IF
176: rdrop dup >r
177: THEN
178: THEN
179: >r
180: THEN
181: THEN
182: r> @
183: REPEAT
184: drop r> ;
185:
186: : prefix-string ( addr len nfa -- addr' len' )
187: dup prefix-found ! ?dup
188: IF
189: name>string rot /string rot drop
190: dup 1+ prefix-found cell+ !
191: ELSE
192: 2drop s" " prefix-found cell+ off
193: THEN ;
194:
195: : search-prefix ( addr1 len1 -- addr2 len2 )
196: 0 vp dup @ 1- cells over +
197: DO I 2@ <>
198: IF I cell+ @ wordlist-id @ swap search-voc THEN
199: [ -1 cells ] Literal +LOOP
200: prefix-string ;
201:
202: : kill-expand ( max span addr pos1 -- max span addr pos2 )
203: prefix-found cell+ @ 0 ?DO (del) LOOP ;
204:
205: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
206: 5 pick over 4 pick + prefix-found @ 0<> - < ;
207:
208: : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
209: kill-expand 2dup extract-word dup 0= IF nip EXIT THEN
210: search-prefix tib-full?
211: IF 7 emit 2drop 0 0 prefix-found 2!
212: ELSE bounds ?DO I c@ (ins) LOOP THEN
213: prefix-found @ IF bl (ins) THEN 0 ;
214:
215: : kill-prefix ( key -- key )
216: dup #tab <> IF 0 0 prefix-found 2! THEN ;
217:
218: ' kill-prefix IS everychar
219:
220: ' next-line ctrl N bindkey
221: ' prev-line ctrl P bindkey
222: ' clear-tib ctrl K bindkey
223: ' first-pos ctrl A bindkey
224: ' end-pos ctrl E bindkey
225: ' (enter) #lf bindkey
226: ' (enter) #cr bindkey
227: ' tab-expand #tab bindkey
228:
229: \ initializing history
230:
231: : get-history ( addr len -- )
232: ['] force-open catch
233: ?dup-if
234: \ !! >stderr
235: \ history-file type ." : " .error cr
236: drop 2drop
237: ['] false ['] false ['] (ret)
238: else
239: to history
240: history file-size throw
241: 2dup forward^ 2! 2dup backward^ 2! end^ 2!
242: ['] next-line ['] prev-line ['] (enter)
243: endif
244: dup #lf bindkey
245: #cr bindkey
246: ctrl P bindkey
247: ctrl N bindkey
248: ;
249:
250: : history-cold ( -- )
251: history-file get-history ;
252:
253: ' history-cold INIT8 chained
254: history-cold
255:
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