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pazsan
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1.11
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\ command line edit and history support 16oct94py |
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pazsan
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1.4
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anton
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1.8
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\ Copyright (C) 1995 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
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\ Gforth is free software; you can redistribute it and/or |
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\ modify it under the terms of the GNU General Public License |
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\ as published by the Free Software Foundation; either version 2 |
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\ of the License, or (at your option) any later version. |
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\ This program is distributed in the hope that it will be useful, |
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\ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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\ GNU General Public License for more details. |
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\ You should have received a copy of the GNU General Public License |
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\ along with this program; if not, write to the Free Software |
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\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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pazsan
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1.11
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:noname |
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char [char] @ - ; |
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:noname |
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char [char] @ - postpone Literal ; |
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special: ctrl ( "<char>" -- ctrl-code ) |
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\ command line editing 16oct94py |
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: >string ( span addr pos1 -- span addr pos1 addr2 len ) |
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over 3 pick 2 pick chars /string ; |
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: type-rest ( span addr pos1 -- span addr pos1 back ) |
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>string tuck type ; |
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: (del) ( max span addr pos1 -- max span addr pos2 ) |
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1- >string over 1+ -rot move |
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rot 1- -rot #bs emit type-rest bl emit 1+ backspaces ; |
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: (ins) ( max span addr pos1 char -- max span addr pos2 ) |
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>r >string over 1+ swap move 2dup chars + r> swap c! |
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rot 1+ -rot type-rest 1- backspaces 1+ ; |
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: ?del ( max span addr pos1 -- max span addr pos2 0 ) |
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dup IF (del) THEN 0 ; |
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: (ret) type-rest drop true space ; |
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: back dup IF 1- #bs emit ELSE #bell emit THEN 0 ; |
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: forw 2 pick over <> IF 2dup + c@ emit 1+ ELSE #bell emit THEN 0 ; |
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: eof 2 pick over or 0= IF |
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bye |
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ELSE 2 pick over <> |
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IF forw drop (del) ELSE #bell emit THEN 0 |
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THEN ; |
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' forw ctrl F cells ctrlkeys + ! |
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' back ctrl B cells ctrlkeys + ! |
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' ?del ctrl H cells ctrlkeys + ! |
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' eof ctrl D cells ctrlkeys + ! |
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' (ins) IS insert-char |
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\ history support 16oct94py |
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pazsan
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1.4
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0 Value history |
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2Variable forward^ |
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2Variable backward^ |
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2Variable end^ |
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pazsan
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1.7
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: force-open ( addr len -- handle ) |
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2dup r/w open-file 0< |
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IF drop r/w create-file throw ELSE nip nip THEN ; |
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pazsan
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1.4
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: get-history ( addr len -- wid ) |
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pazsan
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1.7
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force-open to history |
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pazsan
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1.4
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history file-size throw |
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2dup forward^ 2! 2dup backward^ 2! end^ 2! ; |
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anton
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1.6
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s" ~/.gforth-history" get-history |
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pazsan
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1.4
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anton
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1.6
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: history-cold |
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Defers 'cold |
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s" ~/.gforth-history" get-history ; |
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pazsan
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1.4
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' history-cold IS 'cold |
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\ moving in history file 16oct94py |
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: clear-line ( max span addr pos1 -- max addr ) |
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backspaces over spaces swap backspaces ; |
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: clear-tib ( max span addr pos -- max 0 addr 0 false ) |
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clear-line 0 tuck dup ; |
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pazsan
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1.7
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: hist-pos ( -- ud ) history file-position throw ; |
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: hist-setpos ( ud -- ) history reposition-file throw ; |
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pazsan
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1.4
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pazsan
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1.7
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: get-line ( addr len -- len' flag ) |
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swap history read-line throw ; |
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pazsan
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1.4
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: next-line ( max span addr pos1 -- max span addr pos2 false ) |
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clear-line |
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pazsan
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1.7
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forward^ 2@ 2dup hist-setpos backward^ 2! |
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2dup get-line drop |
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hist-pos forward^ 2! |
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tuck 2dup type 0 ; |
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pazsan
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1.4
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: prev-line ( max span addr pos1 -- max span addr pos2 false ) |
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pazsan
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1.7
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clear-line backward^ 2@ forward^ 2! |
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over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos |
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BEGIN |
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backward^ 2! 2dup get-line WHILE |
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hist-pos 2dup forward^ 2@ d< WHILE |
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rot drop |
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REPEAT 2drop THEN |
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tuck 2dup type 0 ; |
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pazsan
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1.4
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Create lfpad #lf c, |
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: (enter) ( max span addr pos1 -- max span addr pos2 true ) |
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pazsan
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1.7
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>r end^ 2@ hist-setpos |
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2dup swap history write-line throw |
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hist-pos 2dup backward^ 2! end^ 2! |
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pazsan
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1.4
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r> (ret) ; |
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\ some other key commands 16oct94py |
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: first-pos ( max span addr pos1 -- max span addr 0 0 ) |
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backspaces 0 0 ; |
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: end-pos ( max span addr pos1 -- max span addr span 0 ) |
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type-rest 2drop over 0 ; |
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: extract-word ( addr len -- addr' len' ) dup >r |
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BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+ |
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tuck + r> rot - ; |
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Create prefix-found 0 , 0 , |
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: word-lex ( nfa1 nfa2 -- -1/0/1 ) |
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anton
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1.9
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dup 0= |
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IF |
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2drop 1 EXIT |
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THEN |
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name>string 2>r name>string |
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dup r@ = |
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IF |
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rdrop r> capscomp 0<= EXIT |
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THEN |
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r> < |
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nip rdrop ; |
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pazsan
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1.4
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anton
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1.9
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: search-voc ( addr len nfa1 nfa2 -- addr len nfa3 ) |
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>r |
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BEGIN |
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dup |
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WHILE |
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>r dup r@ name>string nip <= |
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IF |
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2dup r@ name>string drop capscomp 0= |
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IF |
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r> dup r@ word-lex |
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IF |
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dup prefix-found @ word-lex |
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0>= |
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IF |
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rdrop dup >r |
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THEN |
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THEN |
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>r |
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pazsan
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1.7
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THEN |
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anton
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1.9
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THEN |
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r> @ |
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REPEAT |
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drop r> ; |
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pazsan
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1.7
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: prefix-string ( addr len nfa -- addr' len' ) |
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dup prefix-found ! ?dup |
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anton
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1.9
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IF |
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name>string rot /string rot drop |
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pazsan
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1.7
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dup 1+ prefix-found cell+ ! |
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ELSE |
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2drop s" " prefix-found cell+ off |
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THEN ; |
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: search-prefix ( addr1 len1 -- addr2 len2 ) |
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0 vp dup @ 1- cells over + |
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DO I 2@ <> |
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IF I cell+ @ @ swap search-voc THEN |
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[ -1 cells ] Literal +LOOP |
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prefix-string ; |
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: kill-expand ( max span addr pos1 -- max span addr pos2 ) |
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prefix-found cell+ @ 0 ?DO (del) LOOP ; |
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: tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag ) |
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5 pick over 4 pick + prefix-found @ 0<> - < ; |
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pazsan
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1.4
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: tab-expand ( max span addr pos1 -- max span addr pos2 0 ) |
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pazsan
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1.7
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kill-expand 2dup extract-word search-prefix |
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tib-full? |
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IF 7 emit 2drop 0 0 prefix-found 2! |
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ELSE bounds ?DO I c@ (ins) LOOP THEN |
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prefix-found @ IF bl (ins) THEN 0 ; |
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pazsan
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1.4
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: kill-prefix ( key -- key ) |
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dup #tab <> IF 0 0 prefix-found 2! THEN ; |
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' kill-prefix IS everychar |
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' next-line ctrl N cells ctrlkeys + ! |
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' prev-line ctrl P cells ctrlkeys + ! |
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' clear-tib ctrl K cells ctrlkeys + ! |
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' first-pos ctrl A cells ctrlkeys + ! |
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' end-pos ctrl E cells ctrlkeys + ! |
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' (enter) #lf cells ctrlkeys + ! |
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' (enter) #cr cells ctrlkeys + ! |
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' tab-expand #tab cells ctrlkeys + ! |