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