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comparison lisp/mule/kinsoku.el @ 110:fe104dbd9147 r20-1b7

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author cvs
date Mon, 13 Aug 2007 09:19:45 +0200
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109:e183fc049578 110:fe104dbd9147
1 ;; kinsoku.el -- Kinsoku (line wrap) processing for XEmacs/Mule
2
3 ;; Copyright (C) 1997 Free Software Foundation, Inc.
4 ;; This file is part of Mule (MULtilingual Enhancement of XEmacs).
5 ;; This file contains Japanese and Chinese characters.
6
7 ;; XEmacs is free software; you can redistribute it and/or modify it
8 ;; under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation; either version 2, or (at your option)
10 ;; any later version.
11
12 ;; XEmacs is distributed in the hope that it will be useful, but
13 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 ;; General Public License for more details.
16
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with XEmacs; see the file COPYING. If not, write to the
19 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 ;; Boston, MA 02111-1307, USA.
21
22 ;; Written by Jareth Hein (jhod@po.iijnet.or.jp) based off of
23 ;; code by S.Tomura, Electrotechnical Lab. (tomura@etl.go.jp) from
24 ;; Mule-2.3
25
26 ;;; Special characters for JIS code
27 ;;; "$B!!!"!#!$!%!&!'!'!(!)!*!+!,!-!.!/(B"
28 ;;; "$B!0!1!2!3!4!5!6!7!8!9!:!;!<!=!>!?(B"
29 ;;; "$B!@!A!B!C!D!E!F!G!H!I!J!K!L!M!N!O(B"
30 ;;; "$B!P!Q!R!S!T!U!V!W!X!Y!Z![!\!]!^!_(B"
31 ;;; "$B!`!a!b!c!d!e!f!g!h!i!j!k!l!m!n!o(B"
32 ;;; "$B!p!q!r!s!t!u!v!w!x!y!z!{!|!}!~(B"
33 ;;; "$B"!"""#"$"%"&"'"(")"*"+","-".(B "
34 ;;; "$B&!&"&#&$&%&&&'&(&)&*&+&,&-&.&/(B"
35 ;;; "$B&0&1&2&3&4&5&6&7&8(B"
36 ;;; "$B&A&B&C&D&E&F&G&H&I&J&K&L&M&N&O(B"
37 ;;; "$B&P&Q&R&S&T&U&V&W&X(B"
38 ;;; "$B'!'"'#'$'%'&'''(')'*'+','-'.'/(B"
39 ;;; "$B'0'1'2'3'4'5'6'7'8'9':';'<'='>'?(B"
40 ;;; "$B'@'A(B"
41 ;;; "$B'Q'R'S'T'U'V'W'X'Y'Z'['\']'^'_!I(B
42 ;;; "$B'`'a'b'c'd'e'f'g'h'i'j'k'l'm'n'o(B"
43 ;;; "$B'p'q(B"
44 ;;; $B#0#1#2#3#4#5#6#7#8#9#A#B#C#D#E#F(B
45 ;;; "$B$!$#$%$'$)$C$c$e$g$n(B"
46 ;;; "$B%!%#%%%'%)%C%c%e%g%n%u%v(B"
47
48 ;;; Special characters for GB
49 ;;;
50 ;;; $A!!!"!#!$!%!&!'!(!)!*!+!,!-!.!/(B
51 ;;;$A!0!1!2!3!4!5!6!7!8!9!:!;!<!=!>!?(B
52 ;;;$A!@!A!B!C!D!E!F!G!H!I!J!K!L!M!N!O(B
53 ;;;$A!P!Q!R!S!T!U!V!W!X!Y!Z![!\!]!^!_(B
54 ;;;$A!`!a!b!c!d!e!f!g!h!i!j!k!l!m!n!o(B
55 ;;;$A!p!q!r!s!t!u!v!w!x!y!z!{!|!}!~(B
56 ;;; $A"1"2"3"4"5"6"7"8"9":";"<"=">"?(B
57 ;;;$A"@"A"B"C"D"E"F"G"H"I"J"K"L"M"N"O(B
58 ;;;$A"P"Q"R"S"T"U"V"W"X"Y"Z"["\"]"^"_(B
59 ;;;$A"`"a"b"c"d"e"f"g"h"i"j"k"l"m"n"o(B
60 ;;;$A"p"q"r"s"t"u"v"w"x"y"z"{"|"}"~(B
61 ;;; $A#!#"###$#%#&#'#(#)#*#+#,#-#.#/(B
62 ;;;$A#0#1#2#3#4#5#6#7#8#9#:#;#<#=#>#?(B
63 ;;;$A#@#A#B#C#D#E#F#G#H#I#J#K#L#M#N#O(B
64 ;;;$A#P#Q#R#S#T#U#V#W#X#Y#Z#[#\#]#^#_(B
65 ;;;$A#`#a#b#c#d#e#f#g#h#i#j#k#l#m#n#o(B
66 ;;;$A#p#q#r#s#t#u#v#w#x#y#z#{#|#}#~(B
67 ;;; $A$!$"$#$$$%$&$'$($)$*$+$,$-$.$/(B
68 ;;;$A$0$1$2$3$4$5$6$7$8$9$:$;$<$=$>$?(B
69 ;;;$A$@$A$B$C$D$E$F$G$H$I$J$K$L$M$N$O(B
70 ;;;$A$P$Q$R$S$T$U$V$W$X$Y$Z$[$\$]$^$_(B
71 ;;;$A$`$a$b$c$d$e$f$g$h$i$j$k$l$m$n$o(B
72 ;;;$A$p$q$r$s$t$u$v$w$x$y$z${$|$}$~(B
73 ;;; $A%!%"%#%$%%%&%'%(%)%*%+%,%-%.%/(B
74 ;;;$A%0%1%2%3%4%5%6%7%8%9%:%;%<%=%>%?(B
75 ;;;$A%@%A%B%C%D%E%F%G%H%I%J%K%L%M%N%O(B
76 ;;;$A%P%Q%R%S%T%U%V%W%X%Y%Z%[%\%]%^%_(B
77 ;;;$A%`%a%b%c%d%e%f%g%h%i%j%k%l%m%n%o(B
78 ;;;$A%p%q%r%s%t%u%v%w%x%y%z%{%|%}%~(B
79 ;;; $A&!&"&#&$&%&&&'&(&)&*&+&,&-&.&/(B
80 ;;;$A&0&1&2&3&4&5&6&7&8&9&:&;&<&=&>&?(B
81 ;;;$A&@&A&B&C&D&E&F&G&H&I&J&K&L&M&N&O(B
82 ;;;$A&P&Q&R&S&T&U&V&W&X&Y&Z&[&\&]&^&_(B
83 ;;;$A&`&a&b&c&d&e&f&g&h&i&j&k&l&m&n&o(B
84 ;;;$A&p&q&r&s&t&u&v&w&x&y&z&{&|&}&~(B
85 ;;; $A'!'"'#'$'%'&'''(')'*'+','-'.'/(B
86 ;;;$A'0'1'2'3'4'5'6'7'8'9':';'<'='>'?(B
87 ;;;$A'@'A'B'C'D'E'F'G'H'I'J'K'L'M'N'O(B
88 ;;;$A'P'Q'R'S'T'U'V'W'X'Y'Z'['\']'^'_(B
89 ;;;$A'`'a'b'c'd'e'f'g'h'i'j'k'l'm'n'o(B
90 ;;;$A'p'q'r's't'u'v'w'x'y'z'{'|'}'~(B
91 ;;; $A(!("(#($(%(&('((()(*(+(,(-(.(/(B
92 ;;;$A(0(1(2(3(4(5(6(7(8(9(:(;(<(=(>(?(B
93 ;;;$A(@(A(B(C(D(E(F(G(H(I(J(K(L(M(N(O(B
94 ;;;$A(P(Q(R(S(T(U(V(W(X(Y(Z([(\(](^(_(B
95 ;;;$A(`(a(b(c(d(e(f(g(h(i(j(k(l(m(n(o(B
96
97 ;;; Special characters for BIG5
98 ;;;
99 ;;; $(0!!!"!#!$!%!&!'!(!)!*!+!,!-!.!/(B
100 ;;;$(0!0!1!2!3!4!5!6!7!8!9!:!;!<!=!>!?(B
101 ;;;$(0!@!A!B!C!D!E!F!G!H!I!J!K!L!M!N!O(B
102 ;;;$(0!P!Q!R!S!T!U!V!W!X!Y!Z![!\!]!^!_(B
103 ;;;$(0!`!a!b!c!d!e!f!g!h!i!j!k!l!m!n!o(B
104 ;;;$(0!p!q!r!s!t!u!v!w!x!y!z!{!|!}!~(B
105 ;;; $(0"!"""#"$"%"&"'"(")"*"+","-"."/(B
106 ;;;$(0"0"1"2"3"4"5"6"7"8"9":";"<"=">"?(B
107 ;;;$(0"@"A"B"C"D"E"F"G"H"I"J"K"L"M"N"O(B
108 ;;;$(0"P"Q"R"S"T"U"V"W"X"Y"Z"["\"]"^"_(B
109 ;;;$(0"`"a"b"c"d"e"f"g"h"i"j"k"l"m"n"o(B
110 ;;;$(0"p"q"r"s"t"u"v"w"x"y"z"{"|"}"~(B
111 ;;; $(0#!#"###$#%#&#'#(#)#*#+#,#-#.#/(B
112 ;;;$(0#0#1#2#3#4#5#6#7#8#9#:#;#<#=#>#?(B
113 ;;;$(0#@#A#B#C#D#E#F#G#H#I#J#K#L#M#N#O(B
114 ;;;$(0#P#Q#R#S#T#U#V#W#X#Y#Z#[#\#]#^#_(B
115 ;;;$(0#`#a#b#c#d#e#f#g#h#i#j#k#l#m#n#o(B
116 ;;;$(0#p#q#r#s#t#u#v#w#x#y#z#{#|#}#~(B
117 ;;; $(0$!$"$#$$$%$&$'$($)$*$+$,$-$.$/(B
118 ;;;$(0$0$1$2$3$4$5$6$7$8$9$:$;$<$=$>$?(B
119 ;;;$(0$@$A$B$C$D$E$F$G$H$I$J$K$L$M$N$O(B
120 ;;;$(0$P$Q$R$S$T$U$V$W$X$Y$Z$[$\$]$^$_(B
121 ;;;$(0$`$a$b$c$d$e$f$g$h$i$j$k$l$m$n$o(B
122 ;;;$(0$p$q$r$s$t$u$v$w$x$y$z${$|$}$~(B
123 ;;; $(0%!%"%#%$%%%&%'%(%)%*%+%,%-%.%/(B
124 ;;;$(0%0%1%2%3%4%5%6%7%8%9%:%;%<%=%>%?(B
125
126 (defvar kinsoku-ascii nil "Do kinsoku-processing for ASCII.")
127 (make-variable-buffer-local 'kinsoku-ascii)
128 (set-default 'kinsoku-ascii nil)
129 (defvar kinsoku-jis t "Do kinsoku-processing for JISX0208.")
130 (make-variable-buffer-local 'kinsoku-jis)
131 (set-default 'kinsoku-jis t)
132 (defvar kinsoku-gb t "Do kinsoku-processing for GB2312.")
133 (make-variable-buffer-local 'kinsoku-gb)
134 (set-default 'kinsoku-gb t)
135 (defvar kinsoku-big5 t "Do kinsoku-processing for Big5..")
136 (make-variable-buffer-local 'kinsoku-big5)
137 (set-default 'kinsoku-big5 t)
138
139 (defvar kinsoku-ascii-bol "!)-_~}]:;',.?" "BOL kinsoku for ASCII.")
140 (defvar kinsoku-ascii-eol "({[" "EOL kinsoku for ASCII.")
141 (defvar kinsoku-jis-bol
142 (concat "$B!"!#!$!%!&!'!(!)!*!+!,!-!.!/!0!1!2!3!4!5!6!7!8!9!:!;!<!=!>(B"
143 "$B!?!@!A!B!C!D!E!G!I!K!M!O!Q!S!U!W!Y![!k!l!m!n(B"
144 "$B$!$#$%$'$)$C$c$e$g$n%!%#%%%'%)%C%c%e%g%n%u%v(B")
145 "BOL kinsoku for JISX0208.")
146 (defvar kinsoku-jis-eol
147 "$B!F!H!J!L!N!P!R!T!V!X!Z!k!l!m!n!w!x(B"
148 "EOL kinsoku for JISX0208.")
149 (defvar kinsoku-gb-bol
150 (concat "$A!"!##.#,!$!%!&!'!(!)!*!+!,!-!/!1#)!3!5!7!9!;!=(B"
151 "$A!?#;#:#?#!!@!A!B!C!c!d!e!f#/#\#"#_#~#|(e(B")
152 "BOL kinsoku for GB2312.")
153 (defvar kinsoku-gb-eol
154 (concat "$A!.!0#"#(!2!4!6!8!:!<!>!c!d!e#@!f!l(B"
155 "$A(E(F(G(H(I(J(K(L(M(N(O(P(Q(R(S(T(U(V(W(X(Y(h(B")
156 "EOL kinsoku for GB2312.")
157 (defvar kinsoku-big5-bol
158 (concat "$(0!"!#!$!%!&!'!(!)!*!+!,!-!.!/!0!1!2(B"
159 "$(0!3!4!5!6!7!8!9!:!;!<!=!?!A!C!E!G!I!K(B"
160 "$(0!M!O!Q(B $(0!S!U!W!Y![!]!_!a!c!e!g!i!k!q(B"
161 "$(0"#"$"%"&"'"(")"*"+","2"3"4"j"k"l"x%7(B")
162 "BOL kinsoku for BIG5.")
163 (defvar kinsoku-big5-eol
164 (concat "$(0!>!@!B!D!F!H!J!L!N!P!R!T!V!X!Z!\!^!`!b(B"
165 "$(0!d!f!h!j!k!q!p"i"j"k"n"x$u$v$w$x$y$z${(B"
166 "$(0$|$}$~%!%"%#%$%%%&%'%(%)%*%+%:(B")
167 "EOL kinsoku for BIG5.")
168
169 (define-category ?s "Kinsoku forbidden start of line characters")
170 (define-category ?e "Kinsoku forbidden end of line characters")
171
172 ;; kinsoku ascii
173 (loop for char in (string-to-char-list kinsoku-ascii-bol)
174 do (modify-category-entry char ?s))
175 (loop for char in kinsoku-ascii-eol
176 do (modify-category-entry char ?e))
177 ;; kinsoku-jis
178 (loop for char in (string-to-char-list kinsoku-jis-bol)
179 do (modify-category-entry char ?s))
180 (loop for char in (string-to-char-list kinsoku-jis-eol)
181 do (modify-category-entry char ?e))
182 ;; kinsoku-gb
183 (loop for char in kinsoku-gb-bol
184 do (modify-category-entry char ?s))
185 (loop for char in kinsoku-gb-eol
186 do (modify-category-entry char ?e))
187 ;; kinsoku-big5
188 (loop for char in kinsoku-big5-bol
189 do (modify-category-entry char ?s))
190 (loop for char in kinsoku-big5-eol
191 do (modify-category-entry char ?e))
192
193 (defun kinsoku-bol-p ()
194 "Check if point would break forbidden beginning-of-line rules
195 Uses category \'s\' to check.
196 point$B$G2~9T$9$k$H9TF,6XB'$K?($l$k$+$I$&$+$r$+$($9!#(B
197 $B9TF,6XB'J8;z$O(B\'s\'$B$N(Bcategory$B$G;XDj$9$k!#(B"
198 (let ((ch (following-char)))
199 (if (or
200 (and kinsoku-ascii (char-in-category-p ch ?a))
201 (and kinsoku-jis (char-in-category-p ch ?j))
202 (and kinsoku-gb (char-in-category-p ch ?c))
203 (and kinsoku-big5 (char-in-category-p ch ?t)))
204 (char-in-category-p ch ?s)
205 nil)))
206
207 (defun kinsoku-eol-p ()
208 "Check if point would break forbidden end-of-line rules
209 Uses category \'e\' to check.
210 point$B$G2~9T$9$k$H9TKv6XB'$K?($l$k$+$I$&$+$r$+$($9!#(B
211 $B9TKv6XB'J8;z$O(B\'s\'$B$N(Bcategory$B$G;XDj$9$k!#(B"
212 (let ((ch (preceding-char)))
213 (if (or
214 (and kinsoku-ascii (char-in-category-p ch ?a))
215 (and kinsoku-jis (char-in-category-p ch ?j))
216 (and kinsoku-gb (char-in-category-p ch ?c))
217 (and kinsoku-big5 (char-in-category-p ch ?t)))
218 (char-in-category-p ch ?e)
219 nil)))
220
221 (defvar kinsoku-extend-limit nil
222 "Defines how many characters kinsoku will search forward before giving up.
223 A value of nil equates to infinity.
224 $B6XB'=hM}$G9T$r?-$P$7$FNI$$H>3QJ8;z?t$r;XDj$9$k!#(B
225 $BHsIi@0?t0J30$N>l9g$OL58BBg$r0UL#$9$k!#(B")
226
227 (defun kinsoku-process ()
228 "Move to a point that will not break forbidden line break rules.
229 $B6XB'$K?($l$J$$E@$X0\F0$9$k!#(B
230 point$B$,9TF,6XB'$K?($l$k>l9g$O9T$r?-$P$7$F!"6XB'$K?($l$J$$E@$rC5$9!#(B
231 point$B$,9TKv6XB'$K?($l$k>l9g$O9T$r=L$a$F!"6XB'$K?($l$J$$E@$rC5$9!#(B
232 $B$?$@$7!"9T?-$P$7H>3QJ8;z?t$,(Bkinsoku-extend-limit$B$r1[$($k$H!"(B
233 $B9T$r=L$a$F6XB'$K?($l$J$$E@$rC5$9!#(B"
234 (let ((bol-kin nil) (eol-kin nil))
235 (if (and (not (bolp))
236 (not (eolp))
237 (or (setq bol-kin (kinsoku-bol-p))
238 (setq eol-kin (kinsoku-eol-p))))
239 (cond(bol-kin (kinsoku-process-extend))
240 (eol-kin (kinsoku-process-shrink))))))
241
242 (defun kinsoku-process-extend ()
243 "Move point forward to a permissable for line-breaking.
244 $B9T$r?-$P$7$F6XB'$K?($l$J$$E@$X0\F0$9$k!#(B"
245 (let ((max-column (+ fill-column
246 (if (and (numberp kinsoku-extend-limit)
247 (>= kinsoku-extend-limit 0))
248 kinsoku-extend-limit
249 10000))) ;;; 10000 is deliberatly unreasonably large
250 ch1 ch2)
251 (while (and (<= (+ (current-column)
252 (char-width (setq ch1 (following-char))))
253 max-column)
254 (not (bolp))
255 (not (eolp))
256 (or (kinsoku-eol-p)
257 (kinsoku-bol-p)
258 ;;; don't break in the middle of an English word
259 (and (char-in-category-p ch1 ?a)
260 (char-in-category-p (setq ch2 (preceding-char)) ?a)
261 (= ?w (char-syntax ch2))
262 (= ?w (char-syntax ch1)))))
263 (forward-char))
264 (if (or (kinsoku-eol-p) (kinsoku-bol-p))
265 (kinsoku-process-shrink))))
266
267 (defun kinsoku-process-shrink ()
268 "Move point backward to a point permissable for line-breaking.
269 $B9T$r=L$a$F6XB'$K?($l$J$$E@$X0\F0$9$k!#(B"
270 (let (ch1 ch2)
271 (while (and (not (bolp))
272 (not (eolp))
273 (or (kinsoku-bol-p)
274 (kinsoku-eol-p)
275 ;;; don't break in the middle of an English word
276 (and
277 (char-in-category-p (setq ch1 (following-char)) ?a)
278 (char-in-category-p (setq ch2 (preceding-char)) ?a)
279 (= ?w (char-syntax ch2))
280 (= ?w (char-syntax ch1)))))
281 (backward-char))))