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1 ;;; thai-util.el --- utilities for Thai -*- coding: iso-2022-7bit; -*-
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2
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3 ;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
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4 ;; Licensed to the Free Software Foundation.
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5
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6 ;; Keywords: mule, multilingual, thai
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software; you can redistribute it and/or modify it
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11 ;; under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful, but
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16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 ;; General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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22 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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23 ;; 02111-1307, USA.
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24
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778
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25 ;;; Synched up with: Emacs 21.1 (language/thai-util.el).
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26
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27 ;;; Commentary:
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771
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28
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29 ;;; Code:
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30
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31 ;; Setting information of Thai characters.
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32
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33 (defconst thai-category-table (make-category-table))
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34 (define-category ?c "Thai consonant" thai-category-table)
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35 (define-category ?v "Thai upper/lower vowel" thai-category-table)
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36 (define-category ?t "Thai tone" thai-category-table)
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37
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38 ;; The general composing rules are as follows:
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39 ;;
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40 ;; T
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41 ;; V T V T
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42 ;; CV -> C, CT -> C, CVT -> C, Cv -> C, CvT -> C
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43 ;; v v
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44 ;;
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45 ;; where C: consonant, V: vowel upper, v: vowel lower, T: tone mark.
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46
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47 (defvar thai-composition-pattern "\\cc\\(\\ct\\|\\cv\\ct?\\)"
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48 "Regular expression matching a Thai composite sequence.")
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49
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50 (let ((l '((?,T!(B consonant "LETTER KO KAI") ; 0xA1
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51 (?,T"(B consonant "LETTER KHO KHAI") ; 0xA2
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52 (?,T#(B consonant "LETTER KHO KHUAT") ; 0xA3
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53 (?,T$(B consonant "LETTER KHO KHWAI") ; 0xA4
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54 (?,T%(B consonant "LETTER KHO KHON") ; 0xA5
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55 (?,T&(B consonant "LETTER KHO RAKHANG") ; 0xA6
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56 (?,T'(B consonant "LETTER NGO NGU") ; 0xA7
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57 (?,T((B consonant "LETTER CHO CHAN") ; 0xA8
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58 (?,T)(B consonant "LETTER CHO CHING") ; 0xA9
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59 (?,T*(B consonant "LETTER CHO CHANG") ; 0xAA
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60 (?,T+(B consonant "LETTER SO SO") ; 0xAB
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61 (?,T,(B consonant "LETTER CHO CHOE") ; 0xAC
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62 (?,T-(B consonant "LETTER YO YING") ; 0xAD
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63 (?,T.(B consonant "LETTER DO CHADA") ; 0xAE
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64 (?,T/(B consonant "LETTER TO PATAK") ; 0xAF
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65 (?,T0(B consonant "LETTER THO THAN") ; 0xB0
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66 (?,T1(B consonant "LETTER THO NANGMONTHO") ; 0xB1
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67 (?,T2(B consonant "LETTER THO PHUTHAO") ; 0xB2
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68 (?,T3(B consonant "LETTER NO NEN") ; 0xB3
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69 (?,T4(B consonant "LETTER DO DEK") ; 0xB4
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70 (?,T5(B consonant "LETTER TO TAO") ; 0xB5
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71 (?,T6(B consonant "LETTER THO THUNG") ; 0xB6
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72 (?,T7(B consonant "LETTER THO THAHAN") ; 0xB7
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73 (?,T8(B consonant "LETTER THO THONG") ; 0xB8
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74 (?,T9(B consonant "LETTER NO NU") ; 0xB9
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75 (?,T:(B consonant "LETTER BO BAIMAI") ; 0xBA
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76 (?,T;(B consonant "LETTER PO PLA") ; 0xBB
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77 (?,T<(B consonant "LETTER PHO PHUNG") ; 0xBC
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78 (?,T=(B consonant "LETTER FO FA") ; 0xBD
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79 (?,T>(B consonant "LETTER PHO PHAN") ; 0xBE
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80 (?,T?(B consonant "LETTER FO FAN") ; 0xBF
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81 (?,T@(B consonant "LETTER PHO SAMPHAO") ; 0xC0
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82 (?,TA(B consonant "LETTER MO MA") ; 0xC1
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83 (?,TB(B consonant "LETTER YO YAK") ; 0xC2
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84 (?,TC(B consonant "LETTER RO RUA") ; 0xC3
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85 (?,TD(B vowel-base "LETTER RU (Pali vowel letter)") ; 0xC4
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86 (?,TE(B consonant "LETTER LO LING") ; 0xC5
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87 (?,TF(B vowel-base "LETTER LU (Pali vowel letter)") ; 0xC6
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88 (?,TG(B consonant "LETTER WO WAEN") ; 0xC7
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89 (?,TH(B consonant "LETTER SO SALA") ; 0xC8
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90 (?,TI(B consonant "LETTER SO RUSI") ; 0xC9
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91 (?,TJ(B consonant "LETTER SO SUA") ; 0xCA
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92 (?,TK(B consonant "LETTER HO HIP") ; 0xCB
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93 (?,TL(B consonant "LETTER LO CHULA") ; 0xCC
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94 (?,TM(B consonant "LETTER O ANG") ; 0xCD
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95 (?,TN(B consonant "LETTER HO NOK HUK") ; 0xCE
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96 (?,TO(B special "PAI YAN NOI (abbreviation)") ; 0xCF
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97 (?,TP(B vowel-base "VOWEL SIGN SARA A") ; 0xD0
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98 (?,TQ(B vowel-upper "VOWEL SIGN MAI HAN-AKAT N/S-T") ; 0xD1
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99 (?,TR(B vowel-base "VOWEL SIGN SARA AA") ; 0xD2
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100 (?,TS(B vowel-base "VOWEL SIGN SARA AM") ; 0xD3
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101 (?,TT(B vowel-upper "VOWEL SIGN SARA I N/S-T") ; 0xD4
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102 (?,TU(B vowel-upper "VOWEL SIGN SARA II N/S-T") ; 0xD5
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103 (?,TV(B vowel-upper "VOWEL SIGN SARA UE N/S-T") ; 0xD6
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104 (?,TW(B vowel-upper "VOWEL SIGN SARA UEE N/S-T") ; 0xD7
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105 (?,TX(B vowel-lower "VOWEL SIGN SARA U N/S-B") ; 0xD8
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106 (?,TY(B vowel-lower "VOWEL SIGN SARA UU N/S-B") ; 0xD9
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107 (?,TZ(B vowel-lower "VOWEL SIGN PHINTHU N/S-B (Pali virama)") ; 0xDA
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108 (?,T[(B invalid nil) ; 0xDA
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109 (?,T\(B invalid nil) ; 0xDC
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110 (?,T](B invalid nil) ; 0xDC
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111 (?,T^(B invalid nil) ; 0xDC
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112 (?,T_(B special "BAHT SIGN (currency symbol)") ; 0xDF
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113 (?,T`(B vowel-base "VOWEL SIGN SARA E") ; 0xE0
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114 (?,Ta(B vowel-base "VOWEL SIGN SARA AE") ; 0xE1
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115 (?,Tb(B vowel-base "VOWEL SIGN SARA O") ; 0xE2
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116 (?,Tc(B vowel-base "VOWEL SIGN SARA MAI MUAN") ; 0xE3
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117 (?,Td(B vowel-base "VOWEL SIGN SARA MAI MALAI") ; 0xE4
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118 (?,Te(B vowel-base "LAK KHANG YAO") ; 0xE5
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119 (?,Tf(B special "MAI YAMOK (repetion)") ; 0xE6
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120 (?,Tg(B vowel-upper "VOWEL SIGN MAI TAI KHU N/S-T") ; 0xE7
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121 (?,Th(B tone "TONE MAI EK N/S-T") ; 0xE8
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122 (?,Ti(B tone "TONE MAI THO N/S-T") ; 0xE9
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123 (?,Tj(B tone "TONE MAI TRI N/S-T") ; 0xEA
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124 (?,Tk(B tone "TONE MAI CHATTAWA N/S-T") ; 0xEB
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125 (?,Tl(B tone "THANTHAKHAT N/S-T (cancellation mark)") ; 0xEC
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126 (?,Tm(B tone "NIKKHAHIT N/S-T (final nasal)") ; 0xED
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127 (?,Tn(B vowel-upper "YAMAKKAN N/S-T") ; 0xEE
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128 (?,To(B special "FONRMAN") ; 0xEF
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129 (?,Tp(B special "DIGIT ZERO") ; 0xF0
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130 (?,Tq(B special "DIGIT ONE") ; 0xF1
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131 (?,Tr(B special "DIGIT TWO") ; 0xF2
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132 (?,Ts(B special "DIGIT THREE") ; 0xF3
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133 (?,Tt(B special "DIGIT FOUR") ; 0xF4
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134 (?,Tu(B special "DIGIT FIVE") ; 0xF5
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135 (?,Tv(B special "DIGIT SIX") ; 0xF6
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136 (?,Tw(B special "DIGIT SEVEN") ; 0xF7
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137 (?,Tx(B special "DIGIT EIGHT") ; 0xF8
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138 (?,Ty(B special "DIGIT NINE") ; 0xF9
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139 (?,Tz(B special "ANGKHANKHU (ellipsis)") ; 0xFA
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140 (?,T{(B special "KHOMUT (beginning of religious texts)") ; 0xFB
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141 (?,T|(B invalid nil) ; 0xFC
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142 (?,T}(B invalid nil) ; 0xFD
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143 (?,T~(B invalid nil) ; 0xFE
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144 ))
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145 elm)
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146 (while l
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147 (setq elm (car l) l (cdr l))
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148 (let ((char (car elm))
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149 (ptype (nth 1 elm)))
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150 (put-char-code-property char 'phonetic-type ptype)
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151 (cond ((eq ptype 'consonant)
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152 (modify-category-entry char ?c thai-category-table))
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153 ((memq ptype '(vowel-upper vowel-lower))
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154 (modify-category-entry char ?v thai-category-table))
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155 ((eq ptype 'tone)
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156 (modify-category-entry char ?t thai-category-table)))
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157 (put-char-code-property char 'name (nth 2 elm)))))
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158
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159 ;;;###autoload
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160 (defun thai-compose-region (beg end)
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161 "Compose Thai characters in the region.
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162 When called from a program, expects two arguments,
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163 positions (integers or markers) specifying the region."
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164 (interactive "r")
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165 (save-restriction
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166 (narrow-to-region beg end)
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167 (goto-char (point-min))
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168 (with-category-table thai-category-table
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169 (while (re-search-forward thai-composition-pattern nil t)
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170 (compose-region (match-beginning 0) (match-end 0))))))
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171
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172 ;;;###autoload
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173 (defun thai-compose-string (string)
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174 "Compose Thai characters in STRING and return the resulting string."
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175 (with-category-table thai-category-table
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176 (let ((idx 0))
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177 (while (setq idx (string-match thai-composition-pattern string idx))
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178 (compose-string string idx (match-end 0))
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179 (setq idx (match-end 0)))))
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180 string)
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181
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182 ;;;###autoload
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183 (defun thai-compose-buffer ()
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184 "Compose Thai characters in the current buffer."
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185 (interactive)
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186 (thai-compose-region (point-min) (point-max)))
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187
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188 ;;;###autoload
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189 (defun thai-post-read-conversion (len)
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190 (thai-compose-region (point) (+ (point) len))
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191 len)
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192
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193 ;;;###autoload
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194 (defun thai-composition-function (from to pattern &optional string)
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195 "Compose Thai text in the region FROM and TO.
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196 The text matches the regular expression PATTERN.
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197 Optional 4th argument STRING, if non-nil, is a string containing text
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198 to compose.
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199
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200 The return value is number of composed characters."
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201 (if (< (1+ from) to)
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202 (prog1 (- to from)
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203 (if string
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204 (compose-string string from to)
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205 (compose-region from to))
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206 (- to from))))
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207
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208 ;;
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209 (provide 'thai-util)
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210
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211 ;;; thai-util.el ends here
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