Annotation of gforth/history.fs, revision 1.16
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<
1.16 ! pazsan 67: IF drop r/w create-file
! 68: throw ELSE nip nip THEN ;
1.4 pazsan 69:
1.15 jwilke 70: s" os-class" environment? [IF] s" unix" compare 0= [ELSE] true [THEN]
71: [IF]
1.16 ! pazsan 72: : history-file ( -- addr u )
1.14 pazsan 73: s" GFORTHHIST" getenv dup 0= IF
74: 2drop s" ~/.gforth-history"
1.16 ! pazsan 75: THEN ;
1.15 jwilke 76: [ELSE]
77:
1.16 ! pazsan 78: : history-dir ( -- addr u )
1.15 jwilke 79: s" TMP" getenv ?dup ?EXIT drop
80: s" TEMP" getenv ?dup ?EXIT drop
81: s" c:/" ;
82:
1.16 ! pazsan 83: : history-file ( -- addr u )
1.15 jwilke 84: s" GFORTHHIST" getenv ?dup ?EXIT
85: drop
86: history-dir pad place
1.16 ! pazsan 87: s" /ghist.fs" pad +place pad count ;
! 88: [THEN]
1.15 jwilke 89:
1.16 ! pazsan 90: : get-history ( addr len -- )
! 91: ['] force-open catch
! 92: dup 0< IF ." can't open " history-file type cr throw THEN drop
! 93: to history
! 94: history file-size throw
! 95: 2dup forward^ 2! 2dup backward^ 2! end^ 2! ;
! 96:
! 97: : history-cold ( -- )
! 98: history-file get-history ;
1.4 pazsan 99:
1.15 jwilke 100: ' history-cold INIT8 chained
101: history-cold
1.4 pazsan 102:
103: \ moving in history file 16oct94py
104:
105: : clear-line ( max span addr pos1 -- max addr )
106: backspaces over spaces swap backspaces ;
107:
108: : clear-tib ( max span addr pos -- max 0 addr 0 false )
109: clear-line 0 tuck dup ;
110:
1.7 pazsan 111: : hist-pos ( -- ud ) history file-position throw ;
112: : hist-setpos ( ud -- ) history reposition-file throw ;
1.4 pazsan 113:
1.7 pazsan 114: : get-line ( addr len -- len' flag )
115: swap history read-line throw ;
116:
1.4 pazsan 117: : next-line ( max span addr pos1 -- max span addr pos2 false )
118: clear-line
1.7 pazsan 119: forward^ 2@ 2dup hist-setpos backward^ 2!
120: 2dup get-line drop
121: hist-pos forward^ 2!
122: tuck 2dup type 0 ;
1.4 pazsan 123:
124: : prev-line ( max span addr pos1 -- max span addr pos2 false )
1.7 pazsan 125: clear-line backward^ 2@ forward^ 2!
126: over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
127: BEGIN
128: backward^ 2! 2dup get-line WHILE
129: hist-pos 2dup forward^ 2@ d< WHILE
130: rot drop
131: REPEAT 2drop THEN
132: tuck 2dup type 0 ;
1.4 pazsan 133:
134: Create lfpad #lf c,
135:
136: : (enter) ( max span addr pos1 -- max span addr pos2 true )
1.7 pazsan 137: >r end^ 2@ hist-setpos
138: 2dup swap history write-line throw
139: hist-pos 2dup backward^ 2! end^ 2!
1.4 pazsan 140: r> (ret) ;
141:
142: \ some other key commands 16oct94py
143:
144: : first-pos ( max span addr pos1 -- max span addr 0 0 )
145: backspaces 0 0 ;
146: : end-pos ( max span addr pos1 -- max span addr span 0 )
147: type-rest 2drop over 0 ;
148:
149: : extract-word ( addr len -- addr' len' ) dup >r
150: BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+
151: tuck + r> rot - ;
152:
153: Create prefix-found 0 , 0 ,
154:
155: : word-lex ( nfa1 nfa2 -- -1/0/1 )
1.9 anton 156: dup 0=
157: IF
158: 2drop 1 EXIT
159: THEN
160: name>string 2>r name>string
161: dup r@ =
162: IF
163: rdrop r> capscomp 0<= EXIT
164: THEN
165: r> <
166: nip rdrop ;
1.4 pazsan 167:
1.9 anton 168: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
169: >r
170: BEGIN
171: dup
172: WHILE
173: >r dup r@ name>string nip <=
174: IF
175: 2dup r@ name>string drop capscomp 0=
176: IF
177: r> dup r@ word-lex
178: IF
179: dup prefix-found @ word-lex
180: 0>=
181: IF
182: rdrop dup >r
183: THEN
184: THEN
185: >r
1.7 pazsan 186: THEN
1.9 anton 187: THEN
188: r> @
189: REPEAT
190: drop r> ;
1.7 pazsan 191:
192: : prefix-string ( addr len nfa -- addr' len' )
193: dup prefix-found ! ?dup
1.9 anton 194: IF
195: name>string rot /string rot drop
1.7 pazsan 196: dup 1+ prefix-found cell+ !
197: ELSE
198: 2drop s" " prefix-found cell+ off
199: THEN ;
200:
201: : search-prefix ( addr1 len1 -- addr2 len2 )
202: 0 vp dup @ 1- cells over +
203: DO I 2@ <>
204: IF I cell+ @ @ swap search-voc THEN
205: [ -1 cells ] Literal +LOOP
206: prefix-string ;
207:
208: : kill-expand ( max span addr pos1 -- max span addr pos2 )
209: prefix-found cell+ @ 0 ?DO (del) LOOP ;
210:
211: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
212: 5 pick over 4 pick + prefix-found @ 0<> - < ;
1.4 pazsan 213:
214: : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
1.7 pazsan 215: kill-expand 2dup extract-word search-prefix
216: tib-full?
217: IF 7 emit 2drop 0 0 prefix-found 2!
218: ELSE bounds ?DO I c@ (ins) LOOP THEN
219: prefix-found @ IF bl (ins) THEN 0 ;
1.4 pazsan 220:
221: : kill-prefix ( key -- key )
222: dup #tab <> IF 0 0 prefix-found 2! THEN ;
223:
224: ' kill-prefix IS everychar
225:
226: ' next-line ctrl N cells ctrlkeys + !
227: ' prev-line ctrl P cells ctrlkeys + !
228: ' clear-tib ctrl K cells ctrlkeys + !
229: ' first-pos ctrl A cells ctrlkeys + !
230: ' end-pos ctrl E cells ctrlkeys + !
231: ' (enter) #lf cells ctrlkeys + !
232: ' (enter) #cr cells ctrlkeys + !
233: ' tab-expand #tab cells ctrlkeys + !
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