git.chise.org Git - chise/xemacs-chise.git.1/blob - lisp/mule/kinsoku.el

   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 ;;;     "\e$B!!!"!#!$!%!&!'!'!(!)!*!+!,!-!.!/\e(B"
  28 ;;;   "\e$B!0!1!2!3!4!5!6!7!8!9!:!;!<!=!>!?\e(B"
  29 ;;;   "\e$B!@!A!B!C!D!E!F!G!H!I!J!K!L!M!N!O\e(B"
  30 ;;;   "\e$B!P!Q!R!S!T!U!V!W!X!Y!Z![!\!]!^!_\e(B"
  31 ;;;   "\e$B!`!a!b!c!d!e!f!g!h!i!j!k!l!m!n!o\e(B"
  32 ;;;   "\e$B!p!q!r!s!t!u!v!w!x!y!z!{!|!}!~\e(B"
  33 ;;;     "\e$B"!"""#"$"%"&"'"(")"*"+","-".\e(B "
  34 ;;;     "\e$B&!&"&#&$&%&&&'&(&)&*&+&,&-&.&/\e(B"
  35 ;;;   "\e$B&0&1&2&3&4&5&6&7&8\e(B"
  36 ;;;     "\e$B&A&B&C&D&E&F&G&H&I&J&K&L&M&N&O\e(B"
  37 ;;;   "\e$B&P&Q&R&S&T&U&V&W&X\e(B"
  38 ;;;     "\e$B'!'"'#'$'%'&'''(')'*'+','-'.'/\e(B"
  39 ;;;   "\e$B'0'1'2'3'4'5'6'7'8'9':';'<'='>'?\e(B"
  40 ;;;   "\e$B'@'A\e(B"
  41 ;;;     "\e$B'Q'R'S'T'U'V'W'X'Y'Z'['\']'^'_!I\e(B
  42 ;;;   "\e$B'`'a'b'c'd'e'f'g'h'i'j'k'l'm'n'o\e(B"
  43 ;;;   "\e$B'p'q\e(B"
  44 ;;;    \e$B#0#1#2#3#4#5#6#7#8#9#A#B#C#D#E#F\e(B
  45 ;;;   "\e$B$!$#$%$'$)$C$c$e$g$n\e(B"
  46 ;;;   "\e$B%!%#%%%'%)%C%c%e%g%n%u%v\e(B"
  47
  48 ;;; Special characters for GB
  49 ;;;
  50 ;;;  \e$A!!!"!#!$!%!&!'!(!)!*!+!,!-!.!/\e(B
  51 ;;;\e$A!0!1!2!3!4!5!6!7!8!9!:!;!<!=!>!?\e(B
  52 ;;;\e$A!@!A!B!C!D!E!F!G!H!I!J!K!L!M!N!O\e(B
  53 ;;;\e$A!P!Q!R!S!T!U!V!W!X!Y!Z![!\!]!^!_\e(B
  54 ;;;\e$A!`!a!b!c!d!e!f!g!h!i!j!k!l!m!n!o\e(B
  55 ;;;\e$A!p!q!r!s!t!u!v!w!x!y!z!{!|!}!~\e(B
  56 ;;;  \e$A"1"2"3"4"5"6"7"8"9":";"<"=">"?\e(B
  57 ;;;\e$A"@"A"B"C"D"E"F"G"H"I"J"K"L"M"N"O\e(B
  58 ;;;\e$A"P"Q"R"S"T"U"V"W"X"Y"Z"["\"]"^"_\e(B
  59 ;;;\e$A"`"a"b"c"d"e"f"g"h"i"j"k"l"m"n"o\e(B
  60 ;;;\e$A"p"q"r"s"t"u"v"w"x"y"z"{"|"}"~\e(B
  61 ;;;  \e$A#!#"###$#%#&#'#(#)#*#+#,#-#.#/\e(B
  62 ;;;\e$A#0#1#2#3#4#5#6#7#8#9#:#;#<#=#>#?\e(B
  63 ;;;\e$A#@#A#B#C#D#E#F#G#H#I#J#K#L#M#N#O\e(B
  64 ;;;\e$A#P#Q#R#S#T#U#V#W#X#Y#Z#[#\#]#^#_\e(B
  65 ;;;\e$A#`#a#b#c#d#e#f#g#h#i#j#k#l#m#n#o\e(B
  66 ;;;\e$A#p#q#r#s#t#u#v#w#x#y#z#{#|#}#~\e(B
  67 ;;;  \e$A$!$"$#$$$%$&$'$($)$*$+$,$-$.$/\e(B
  68 ;;;\e$A$0$1$2$3$4$5$6$7$8$9$:$;$<$=$>$?\e(B
  69 ;;;\e$A$@$A$B$C$D$E$F$G$H$I$J$K$L$M$N$O\e(B
  70 ;;;\e$A$P$Q$R$S$T$U$V$W$X$Y$Z$[$\$]$^$_\e(B
  71 ;;;\e$A$`$a$b$c$d$e$f$g$h$i$j$k$l$m$n$o\e(B
  72 ;;;\e$A$p$q$r$s$t$u$v$w$x$y$z${$|$}$~\e(B
  73 ;;;  \e$A%!%"%#%$%%%&%'%(%)%*%+%,%-%.%/\e(B
  74 ;;;\e$A%0%1%2%3%4%5%6%7%8%9%:%;%<%=%>%?\e(B
  75 ;;;\e$A%@%A%B%C%D%E%F%G%H%I%J%K%L%M%N%O\e(B
  76 ;;;\e$A%P%Q%R%S%T%U%V%W%X%Y%Z%[%\%]%^%_\e(B
  77 ;;;\e$A%`%a%b%c%d%e%f%g%h%i%j%k%l%m%n%o\e(B
  78 ;;;\e$A%p%q%r%s%t%u%v%w%x%y%z%{%|%}%~\e(B
  79 ;;;  \e$A&!&"&#&$&%&&&'&(&)&*&+&,&-&.&/\e(B
  80 ;;;\e$A&0&1&2&3&4&5&6&7&8&9&:&;&<&=&>&?\e(B
  81 ;;;\e$A&@&A&B&C&D&E&F&G&H&I&J&K&L&M&N&O\e(B
  82 ;;;\e$A&P&Q&R&S&T&U&V&W&X&Y&Z&[&\&]&^&_\e(B
  83 ;;;\e$A&`&a&b&c&d&e&f&g&h&i&j&k&l&m&n&o\e(B
  84 ;;;\e$A&p&q&r&s&t&u&v&w&x&y&z&{&|&}&~\e(B
  85 ;;;  \e$A'!'"'#'$'%'&'''(')'*'+','-'.'/\e(B
  86 ;;;\e$A'0'1'2'3'4'5'6'7'8'9':';'<'='>'?\e(B
  87 ;;;\e$A'@'A'B'C'D'E'F'G'H'I'J'K'L'M'N'O\e(B
  88 ;;;\e$A'P'Q'R'S'T'U'V'W'X'Y'Z'['\']'^'_\e(B
  89 ;;;\e$A'`'a'b'c'd'e'f'g'h'i'j'k'l'm'n'o\e(B
  90 ;;;\e$A'p'q'r's't'u'v'w'x'y'z'{'|'}'~\e(B
  91 ;;;  \e$A(!("(#($(%(&('((()(*(+(,(-(.(/\e(B
  92 ;;;\e$A(0(1(2(3(4(5(6(7(8(9(:(;(<(=(>(?\e(B
  93 ;;;\e$A(@(A(B(C(D(E(F(G(H(I(J(K(L(M(N(O\e(B
  94 ;;;\e$A(P(Q(R(S(T(U(V(W(X(Y(Z([(\(](^(_\e(B
  95 ;;;\e$A(`(a(b(c(d(e(f(g(h(i(j(k(l(m(n(o\e(B
  96
  97 ;;; Special characters for BIG5
  98 ;;;
  99 ;;;  \e$(0!!!"!#!$!%!&!'!(!)!*!+!,!-!.!/\e(B
 100 ;;;\e$(0!0!1!2!3!4!5!6!7!8!9!:!;!<!=!>!?\e(B
 101 ;;;\e$(0!@!A!B!C!D!E!F!G!H!I!J!K!L!M!N!O\e(B
 102 ;;;\e$(0!P!Q!R!S!T!U!V!W!X!Y!Z![!\!]!^!_\e(B
 103 ;;;\e$(0!`!a!b!c!d!e!f!g!h!i!j!k!l!m!n!o\e(B
 104 ;;;\e$(0!p!q!r!s!t!u!v!w!x!y!z!{!|!}!~\e(B
 105 ;;;  \e$(0"!"""#"$"%"&"'"(")"*"+","-"."/\e(B
 106 ;;;\e$(0"0"1"2"3"4"5"6"7"8"9":";"<"=">"?\e(B
 107 ;;;\e$(0"@"A"B"C"D"E"F"G"H"I"J"K"L"M"N"O\e(B
 108 ;;;\e$(0"P"Q"R"S"T"U"V"W"X"Y"Z"["\"]"^"_\e(B
 109 ;;;\e$(0"`"a"b"c"d"e"f"g"h"i"j"k"l"m"n"o\e(B
 110 ;;;\e$(0"p"q"r"s"t"u"v"w"x"y"z"{"|"}"~\e(B
 111 ;;;  \e$(0#!#"###$#%#&#'#(#)#*#+#,#-#.#/\e(B
 112 ;;;\e$(0#0#1#2#3#4#5#6#7#8#9#:#;#<#=#>#?\e(B
 113 ;;;\e$(0#@#A#B#C#D#E#F#G#H#I#J#K#L#M#N#O\e(B
 114 ;;;\e$(0#P#Q#R#S#T#U#V#W#X#Y#Z#[#\#]#^#_\e(B
 115 ;;;\e$(0#`#a#b#c#d#e#f#g#h#i#j#k#l#m#n#o\e(B
 116 ;;;\e$(0#p#q#r#s#t#u#v#w#x#y#z#{#|#}#~\e(B
 117 ;;;  \e$(0$!$"$#$$$%$&$'$($)$*$+$,$-$.$/\e(B
 118 ;;;\e$(0$0$1$2$3$4$5$6$7$8$9$:$;$<$=$>$?\e(B
 119 ;;;\e$(0$@$A$B$C$D$E$F$G$H$I$J$K$L$M$N$O\e(B
 120 ;;;\e$(0$P$Q$R$S$T$U$V$W$X$Y$Z$[$\$]$^$_\e(B
 121 ;;;\e$(0$`$a$b$c$d$e$f$g$h$i$j$k$l$m$n$o\e(B
 122 ;;;\e$(0$p$q$r$s$t$u$v$w$x$y$z${$|$}$~\e(B
 123 ;;;  \e$(0%!%"%#%$%%%&%'%(%)%*%+%,%-%.%/\e(B
 124 ;;;\e$(0%0%1%2%3%4%5%6%7%8%9%:%;%<%=%>%?\e(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  "\e$B!"!#!$!%!&!'!(!)!*!+!,!-!.!/!0!1!2!3!4!5!6!7!8!9!:!;!<!=!>\e(B"
 143            "\e$B!?!@!A!B!C!D!E!G!I!K!M!O!Q!S!U!W!Y![!k!l!m!n\e(B"
 144            "\e$B$!$#$%$'$)$C$c$e$g$n%!%#%%%'%)%C%c%e%g%n%u%v\e(B")
 145   "BOL kinsoku for JISX0208.")
 146 (defvar kinsoku-jis-eol
 147   "\e$B!F!H!J!L!N!P!R!T!V!X!Z!k!l!m!n!w!x\e(B"
 148   "EOL kinsoku for JISX0208.")
 149 (defvar kinsoku-gb-bol
 150   (concat  "\e$A!"!##.#,!$!%!&!'!(!)!*!+!,!-!/!1#)!3!5!7!9!;!=\e(B"
 151            "\e$A!?#;#:#?#!!@!A!B!C!c!d!e!f#/#\#"#_#~#|(e\e(B")
 152   "BOL kinsoku for GB2312.")
 153 (defvar kinsoku-gb-eol
 154   (concat "\e$A!.!0#"#(!2!4!6!8!:!<!>!c!d!e#@!f!l\e(B"
 155           "\e$A(E(F(G(H(I(J(K(L(M(N(O(P(Q(R(S(T(U(V(W(X(Y(h\e(B")
 156   "EOL kinsoku for GB2312.")
 157 (defvar kinsoku-big5-bol
 158   (concat  "\e$(0!"!#!$!%!&!'!(!)!*!+!,!-!.!/!0!1!2\e(B"
 159            "\e$(0!3!4!5!6!7!8!9!:!;!<!=!?!A!C!E!G!I!K\e(B"
 160            "\e$(0!M!O!Q\e(B       \e$(0!S!U!W!Y![!]!_!a!c!e!g!i!k!q\e(B"
 161            "\e$(0"#"$"%"&"'"(")"*"+","2"3"4"j"k"l"x%7\e(B")
 162   "BOL kinsoku for BIG5.")
 163 (defvar kinsoku-big5-eol
 164   (concat "\e$(0!>!@!B!D!F!H!J!L!N!P!R!T!V!X!Z!\!^!`!b\e(B"
 165           "\e$(0!d!f!h!j!k!q!p"i"j"k"n"x$u$v$w$x$y$z${\e(B"
 166           "\e$(0$|$}$~%!%"%#%$%%%&%'%(%)%*%+%:\e(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 (string-to-char-list 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 (string-to-char-list kinsoku-gb-bol)
 184       do (modify-category-entry char ?s))
 185 (loop for char in (string-to-char-list kinsoku-gb-eol)
 186       do (modify-category-entry char ?e))
 187 ;; kinsoku-big5
 188 (loop for char in (string-to-char-list kinsoku-big5-bol)
 189       do (modify-category-entry char ?s))
 190 (loop for char in (string-to-char-list 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\e$B$G2~9T$9$k$H9TF,6XB'$K?($l$k$+$I$&$+$r$+$($9!#\e(B
 197 \e$B9TF,6XB'J8;z$O\e(B\'s\'\e$B$N\e(Bcategory\e$B$G;XDj$9$k!#\e(B"
 198   (let ((before (char-before))
 199         (after (char-after)))
 200     (if (and after
 201              (or
 202               (and kinsoku-ascii (char-in-category-p after ?a))
 203               (and kinsoku-jis (or (char-in-category-p after ?j)
 204                                    (and before
 205                                         (char-in-category-p before ?j))))
 206               (and kinsoku-gb (or (char-in-category-p after ?c)
 207                                   (and before
 208                                        (char-in-category-p before ?c))))
 209               (and kinsoku-big5 (or (char-in-category-p after ?t)
 210                                     (and before
 211                                          (char-in-category-p before ?t))))))
 212         (char-in-category-p after ?s)
 213       nil)))
 214
 215 (defun kinsoku-eol-p ()
 216   "Check if point would break forbidden end-of-line rules
 217 Uses category \'e\' to check.
 218 point\e$B$G2~9T$9$k$H9TKv6XB'$K?($l$k$+$I$&$+$r$+$($9!#\e(B
 219 \e$B9TKv6XB'J8;z$O\e(B\'s\'\e$B$N\e(Bcategory\e$B$G;XDj$9$k!#\e(B"
 220   (let ((before (char-before))
 221         (after (char-after)))
 222     (if (and before
 223              (or
 224               (and kinsoku-ascii (char-in-category-p before ?a))
 225               (and kinsoku-jis (or (char-in-category-p before ?j)
 226                                    (and after
 227                                         (char-in-category-p after ?j))))
 228               (and kinsoku-gb (or (char-in-category-p before ?c)
 229                                   (and after
 230                                        (char-in-category-p after ?c))))
 231               (and kinsoku-big5 (or (char-in-category-p before ?t)
 232                                     (and after
 233                                          (char-in-category-p after ?t))))))
 234         (char-in-category-p before ?e)
 235       nil)))
 236
 237 (defvar kinsoku-extend-limit nil
 238   "Defines how many characters kinsoku will search forward before giving up.
 239 A value of nil equates to infinity.
 240 \e$B6XB'=hM}$G9T$r?-$P$7$FNI$$H>3QJ8;z?t$r;XDj$9$k!#\e(B
 241 \e$BHsIi@0?t0J30$N>l9g$OL58BBg$r0UL#$9$k!#\e(B")
 242
 243 (defun kinsoku-process ()
 244   "Move to a point that will not break forbidden line break rules.
 245 \e$B6XB'$K?($l$J$$E@$X0\F0$9$k!#\e(B
 246 point\e$B$,9TF,6XB'$K?($l$k>l9g$O9T$r?-$P$7$F!"6XB'$K?($l$J$$E@$rC5$9!#\e(B
 247 point\e$B$,9TKv6XB'$K?($l$k>l9g$O9T$r=L$a$F!"6XB'$K?($l$J$$E@$rC5$9!#\e(B
 248 \e$B$?$@$7!"9T?-$P$7H>3QJ8;z?t$,\e(Bkinsoku-extend-limit\e$B$r1[$($k$H!"\e(B
 249 \e$B9T$r=L$a$F6XB'$K?($l$J$$E@$rC5$9!#\e(B"
 250   (let ((bol-kin nil) (eol-kin nil))
 251     (if (and (not (bolp))
 252              (not (eolp))
 253              (or (setq bol-kin (kinsoku-bol-p))
 254                  (setq eol-kin (kinsoku-eol-p))))
 255         (cond(bol-kin (kinsoku-process-extend))
 256              (eol-kin (kinsoku-process-shrink))))))
 257
 258 (defun kinsoku-process-extend ()
 259   "Move point forward to a permissable for line-breaking.
 260 \e$B9T$r?-$P$7$F6XB'$K?($l$J$$E@$X0\F0$9$k!#\e(B"
 261   (let ((max-column (+ fill-column
 262                        (if (and (numberp kinsoku-extend-limit)
 263                                 (>= kinsoku-extend-limit 0))
 264                            kinsoku-extend-limit
 265                          10000)))  ;;; 10000 is deliberatly unreasonably large
 266         ch1 ch2)
 267     (while (and (setq ch1 (char-after))
 268                 (<= (+ (current-column)
 269                        (char-width ch1 ))
 270                     max-column)
 271                 (not (bolp))
 272                 (not (eolp))
 273                 (or (kinsoku-eol-p)
 274                     (kinsoku-bol-p)
 275                     ;;; don't break in the middle of an English word
 276                     (and (char-in-category-p ch1 ?a)
 277                          (setq ch2 (char-before))
 278                          (char-in-category-p ch2 ?a)
 279                          (= ?w (char-syntax ch2))
 280                          (= ?w (char-syntax ch1)))))
 281       (forward-char))
 282     (if (or (kinsoku-eol-p) (kinsoku-bol-p))
 283         (kinsoku-process-shrink))))
 284
 285 (defun kinsoku-process-shrink ()
 286   "Move point backward to a point permissable for line-breaking.
 287 \e$B9T$r=L$a$F6XB'$K?($l$J$$E@$X0\F0$9$k!#\e(B"
 288   (let (ch1 ch2)
 289     (while (and (not (bolp))
 290                 (not (eolp))
 291                 (or (kinsoku-bol-p)
 292                     (kinsoku-eol-p)
 293                 ;;; don't break in the middle of an English word
 294                     (and
 295                      (char-in-category-p (setq ch1 (following-char)) ?a)
 296                      (char-in-category-p (setq ch2 (preceding-char)) ?a)
 297                      (= ?w (char-syntax ch2))
 298                      (= ?w (char-syntax ch1)))))
 299       (backward-char))))