Annotation of gforth/history.fs, revision 1.15
1.11 pazsan 1: \ command line edit and history support 16oct94py
1.4 pazsan 2:
1.8 anton 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:
1.11 pazsan 21: :noname
22: char [char] @ - ;
23: :noname
24: char [char] @ - postpone Literal ;
1.12 anton 25: interpret/compile: ctrl ( "<char>" -- ctrl-code )
1.11 pazsan 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:
1.13 anton 59: 0 Value history \ history file fid
1.4 pazsan 60:
61: 2Variable forward^
62: 2Variable backward^
63: 2Variable end^
64:
1.13 anton 65: : force-open ( addr len -- fid )
1.7 pazsan 66: 2dup r/w open-file 0<
67: IF drop r/w create-file throw ELSE nip nip THEN ;
68:
1.14 pazsan 69: : get-history ( addr len -- )
1.7 pazsan 70: force-open to history
1.4 pazsan 71: history file-size throw
72: 2dup forward^ 2! 2dup backward^ 2! end^ 2! ;
73:
1.15 ! jwilke 74: s" os-class" environment? [IF] s" unix" compare 0= [ELSE] true [THEN]
! 75: [IF]
1.6 anton 76: : history-cold
1.14 pazsan 77: s" GFORTHHIST" getenv dup 0= IF
78: 2drop s" ~/.gforth-history"
79: THEN get-history ;
1.15 ! jwilke 80: [ELSE]
! 81:
! 82: : history-dir
! 83: s" TMP" getenv ?dup ?EXIT drop
! 84: s" TEMP" getenv ?dup ?EXIT drop
! 85: s" c:/" ;
! 86:
! 87: : history-file
! 88: s" GFORTHHIST" getenv ?dup ?EXIT
! 89: drop
! 90: history-dir pad place
! 91: s" /ghist.txt" pad +place pad count ;
! 92:
! 93: : history-cold
! 94: history-file
! 95: get-history ;
! 96: [THEN]
1.4 pazsan 97:
1.15 ! jwilke 98: ' history-cold INIT8 chained
! 99: history-cold
1.4 pazsan 100:
101: \ moving in history file 16oct94py
102:
103: : clear-line ( max span addr pos1 -- max addr )
104: backspaces over spaces swap backspaces ;
105:
106: : clear-tib ( max span addr pos -- max 0 addr 0 false )
107: clear-line 0 tuck dup ;
108:
1.7 pazsan 109: : hist-pos ( -- ud ) history file-position throw ;
110: : hist-setpos ( ud -- ) history reposition-file throw ;
1.4 pazsan 111:
1.7 pazsan 112: : get-line ( addr len -- len' flag )
113: swap history read-line throw ;
114:
1.4 pazsan 115: : next-line ( max span addr pos1 -- max span addr pos2 false )
116: clear-line
1.7 pazsan 117: forward^ 2@ 2dup hist-setpos backward^ 2!
118: 2dup get-line drop
119: hist-pos forward^ 2!
120: tuck 2dup type 0 ;
1.4 pazsan 121:
122: : prev-line ( max span addr pos1 -- max span addr pos2 false )
1.7 pazsan 123: clear-line backward^ 2@ forward^ 2!
124: over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
125: BEGIN
126: backward^ 2! 2dup get-line WHILE
127: hist-pos 2dup forward^ 2@ d< WHILE
128: rot drop
129: REPEAT 2drop THEN
130: tuck 2dup type 0 ;
1.4 pazsan 131:
132: Create lfpad #lf c,
133:
134: : (enter) ( max span addr pos1 -- max span addr pos2 true )
1.7 pazsan 135: >r end^ 2@ hist-setpos
136: 2dup swap history write-line throw
137: hist-pos 2dup backward^ 2! end^ 2!
1.4 pazsan 138: r> (ret) ;
139:
140: \ some other key commands 16oct94py
141:
142: : first-pos ( max span addr pos1 -- max span addr 0 0 )
143: backspaces 0 0 ;
144: : end-pos ( max span addr pos1 -- max span addr span 0 )
145: type-rest 2drop over 0 ;
146:
147: : extract-word ( addr len -- addr' len' ) dup >r
148: BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+
149: tuck + r> rot - ;
150:
151: Create prefix-found 0 , 0 ,
152:
153: : word-lex ( nfa1 nfa2 -- -1/0/1 )
1.9 anton 154: dup 0=
155: IF
156: 2drop 1 EXIT
157: THEN
158: name>string 2>r name>string
159: dup r@ =
160: IF
161: rdrop r> capscomp 0<= EXIT
162: THEN
163: r> <
164: nip rdrop ;
1.4 pazsan 165:
1.9 anton 166: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
167: >r
168: BEGIN
169: dup
170: WHILE
171: >r dup r@ name>string nip <=
172: IF
173: 2dup r@ name>string drop capscomp 0=
174: IF
175: r> dup r@ word-lex
176: IF
177: dup prefix-found @ word-lex
178: 0>=
179: IF
180: rdrop dup >r
181: THEN
182: THEN
183: >r
1.7 pazsan 184: THEN
1.9 anton 185: THEN
186: r> @
187: REPEAT
188: drop r> ;
1.7 pazsan 189:
190: : prefix-string ( addr len nfa -- addr' len' )
191: dup prefix-found ! ?dup
1.9 anton 192: IF
193: name>string rot /string rot drop
1.7 pazsan 194: dup 1+ prefix-found cell+ !
195: ELSE
196: 2drop s" " prefix-found cell+ off
197: THEN ;
198:
199: : search-prefix ( addr1 len1 -- addr2 len2 )
200: 0 vp dup @ 1- cells over +
201: DO I 2@ <>
202: IF I cell+ @ @ swap search-voc THEN
203: [ -1 cells ] Literal +LOOP
204: prefix-string ;
205:
206: : kill-expand ( max span addr pos1 -- max span addr pos2 )
207: prefix-found cell+ @ 0 ?DO (del) LOOP ;
208:
209: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
210: 5 pick over 4 pick + prefix-found @ 0<> - < ;
1.4 pazsan 211:
212: : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
1.7 pazsan 213: kill-expand 2dup extract-word search-prefix
214: tib-full?
215: IF 7 emit 2drop 0 0 prefix-found 2!
216: ELSE bounds ?DO I c@ (ins) LOOP THEN
217: prefix-found @ IF bl (ins) THEN 0 ;
1.4 pazsan 218:
219: : kill-prefix ( key -- key )
220: dup #tab <> IF 0 0 prefix-found 2! THEN ;
221:
222: ' kill-prefix IS everychar
223:
224: ' next-line ctrl N cells ctrlkeys + !
225: ' prev-line ctrl P cells ctrlkeys + !
226: ' clear-tib ctrl K cells ctrlkeys + !
227: ' first-pos ctrl A cells ctrlkeys + !
228: ' end-pos ctrl E cells ctrlkeys + !
229: ' (enter) #lf cells ctrlkeys + !
230: ' (enter) #cr cells ctrlkeys + !
231: ' tab-expand #tab cells ctrlkeys + !
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