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Text File  |  1998-05-21  |  10.8 KB  |  286 lines
  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 (char-after)))
  199.     (if (and ch
  200.          (or
  201.           (and kinsoku-ascii (char-in-category-p ch ?a))
  202.           (and kinsoku-jis (char-in-category-p ch ?j))
  203.           (and kinsoku-gb (char-in-category-p ch ?c))
  204.           (and kinsoku-big5 (char-in-category-p ch ?t))))
  205.     (char-in-category-p ch ?s)
  206.       nil)))
  207.  
  208. (defun kinsoku-eol-p ()
  209.   "Check if point would break forbidden end-of-line rules
  210. Uses category \'e\' to check.
  211. point$B$G2~9T$9$k$H9TKv6XB'$K?($l$k$+$I$&$+$r$+$($9!#(B
  212. $B9TKv6XB'J8;z$O(B\'s\'$B$N(Bcategory$B$G;XDj$9$k!#(B"
  213.   (let ((ch (char-before)))
  214.     (if (and ch
  215.          (or
  216.           (and kinsoku-ascii (char-in-category-p ch ?a))
  217.           (and kinsoku-jis (char-in-category-p ch ?j))
  218.           (and kinsoku-gb (char-in-category-p ch ?c))
  219.           (and kinsoku-big5 (char-in-category-p ch ?t))))
  220.     (char-in-category-p ch ?e)
  221.       nil)))
  222.  
  223. (defvar kinsoku-extend-limit nil
  224.   "Defines how many characters kinsoku will search forward before giving up.
  225. A value of nil equates to infinity.
  226. $B6XB'=hM}$G9T$r?-$P$7$FNI$$H>3QJ8;z?t$r;XDj$9$k!#(B
  227. $BHsIi@0?t0J30$N>l9g$OL58BBg$r0UL#$9$k!#(B")
  228.  
  229. (defun kinsoku-process ()
  230.   "Move to a point that will not break forbidden line break rules.
  231. $B6XB'$K?($l$J$$E@$X0\F0$9$k!#(B
  232. point$B$,9TF,6XB'$K?($l$k>l9g$O9T$r?-$P$7$F!"6XB'$K?($l$J$$E@$rC5$9!#(B
  233. point$B$,9TKv6XB'$K?($l$k>l9g$O9T$r=L$a$F!"6XB'$K?($l$J$$E@$rC5$9!#(B
  234. $B$?$@$7!"9T?-$P$7H>3QJ8;z?t$,(Bkinsoku-extend-limit$B$r1[$($k$H!"(B
  235. $B9T$r=L$a$F6XB'$K?($l$J$$E@$rC5$9!#(B"
  236.   (let ((bol-kin nil) (eol-kin nil))
  237.     (if (and (not (bolp))
  238.          (not (eolp))
  239.          (or (setq bol-kin (kinsoku-bol-p))
  240.          (setq eol-kin (kinsoku-eol-p))))
  241.     (cond(bol-kin (kinsoku-process-extend))
  242.          (eol-kin (kinsoku-process-shrink))))))
  243.  
  244. (defun kinsoku-process-extend ()
  245.   "Move point forward to a permissable for line-breaking.
  246. $B9T$r?-$P$7$F6XB'$K?($l$J$$E@$X0\F0$9$k!#(B"
  247.   (let ((max-column (+ fill-column 
  248.                (if (and (numberp kinsoku-extend-limit)
  249.                 (>= kinsoku-extend-limit 0))
  250.                kinsoku-extend-limit
  251.              10000)))  ;;; 10000 is deliberatly unreasonably large
  252.     ch1 ch2)
  253.     (while (and (setq ch1 (char-after))
  254.         (<= (+ (current-column)
  255.                (char-width ch1 ))
  256.             max-column)
  257.         (not (bolp))
  258.         (not (eolp))
  259.         (or (kinsoku-eol-p)
  260.             (kinsoku-bol-p)
  261.                 ;;; don't break in the middle of an English word
  262.             (and (char-in-category-p ch1 ?a)
  263.              (setq ch2 (char-before))
  264.              (char-in-category-p ch2 ?a)
  265.              (= ?w (char-syntax ch2))
  266.              (= ?w (char-syntax ch1)))))
  267.       (forward-char))
  268.     (if (or (kinsoku-eol-p) (kinsoku-bol-p))
  269.     (kinsoku-process-shrink))))
  270.  
  271. (defun kinsoku-process-shrink ()
  272.   "Move point backward to a point permissable for line-breaking.
  273. $B9T$r=L$a$F6XB'$K?($l$J$$E@$X0\F0$9$k!#(B"
  274.   (let (ch1 ch2)
  275.     (while (and (not (bolp))
  276.         (not (eolp))
  277.         (or (kinsoku-bol-p)
  278.             (kinsoku-eol-p)
  279.         ;;; don't break in the middle of an English word
  280.             (and
  281.              (char-in-category-p (setq ch1 (following-char)) ?a)
  282.              (char-in-category-p (setq ch2 (preceding-char)) ?a)
  283.              (= ?w (char-syntax ch2))
  284.              (= ?w (char-syntax ch1)))))
  285.       (backward-char))))
  286.