;;; thai-util.el --- utilities for Thai -*- coding: iso-2022-7bit; -*- ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, ;; 2005, 2006, 2007 ;; National Institute of Advanced Industrial Science and Technology (AIST) ;; Registration Number H14PRO021 ;; Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 ;; Free Software Foundation, Inc. ;; Keywords: mule, multilingual, thai ;; This file is part of GNU Emacs. ;; GNU Emacs is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation; either version 3, or (at your option) ;; any later version. ;; GNU Emacs is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with GNU Emacs; see the file COPYING. If not, write to the ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, ;; Boston, MA 02110-1301, USA. ;;; Commentary: ;;; Code: (defvar thai-auto-composition-mode) ;; Setting information of Thai characters. (defconst thai-category-table (make-category-table)) (define-category ?c "Thai consonant" thai-category-table) (define-category ?v "Thai upper/lower vowel" thai-category-table) (define-category ?t "Thai tone mark" thai-category-table) (define-category ?u "Thai tone mark and upper sign" thai-category-table) (define-category ?I "THAI CHARACTER SARA I" thai-category-table) (define-category ?U "THAI CHARACTER THANTHAKHAT" thai-category-table) ;; The general composing rules are as follows: ;; ;; T ;; V U V U ;; CV -> C, CU -> C, CVT -> C, Cv -> C, CvU -> C ;; v v ;; ;; where C: consonant, V: vowel upper, v: vowel lower, ;; T: tone mark, U: tone mark and upper sign. ;; Special rule: The sign `,Tl(B' can be put on the vowel `,TT(B'. (defvar thai-composition-pattern "\\cc\\(\\cu\\|\\cI\\cU\\|\\cv\\ct?\\)\\|\\cv\\ct\\|\\cI\\cU" "Regular expression matching a Thai composite sequence.") (defun thai-self-insert-command (&optional n) "Insert the Thai character you type. The character will be composed with the surrounding Thai character if necessary." (interactive "*p") (let ((pos (point)) category-set ch) (self-insert-command n) (or thai-auto-composition-mode (thai-auto-composition (1- (point)) (point) 0)))) (let ((l '((?,T!(B consonant "LETTER KO KAI") ; 0xA1 (?,T"(B consonant "LETTER KHO KHAI") ; 0xA2 (?,T#(B consonant "LETTER KHO KHUAT") ; 0xA3 (?,T$(B consonant "LETTER KHO KHWAI") ; 0xA4 (?,T%(B consonant "LETTER KHO KHON") ; 0xA5 (?,T&(B consonant "LETTER KHO RAKHANG") ; 0xA6 (?,T'(B consonant "LETTER NGO NGU") ; 0xA7 (?,T((B consonant "LETTER CHO CHAN") ; 0xA8 (?,T)(B consonant "LETTER CHO CHING") ; 0xA9 (?,T*(B consonant "LETTER CHO CHANG") ; 0xAA (?,T+(B consonant "LETTER SO SO") ; 0xAB (?,T,(B consonant "LETTER CHO CHOE") ; 0xAC (?,T-(B consonant "LETTER YO YING") ; 0xAD (?,T.(B consonant "LETTER DO CHADA") ; 0xAE (?,T/(B consonant "LETTER TO PATAK") ; 0xAF (?,T0(B consonant "LETTER THO THAN") ; 0xB0 (?,T1(B consonant "LETTER THO NANGMONTHO") ; 0xB1 (?,T2(B consonant "LETTER THO PHUTHAO") ; 0xB2 (?,T3(B consonant "LETTER NO NEN") ; 0xB3 (?,T4(B consonant "LETTER DO DEK") ; 0xB4 (?,T5(B consonant "LETTER TO TAO") ; 0xB5 (?,T6(B consonant "LETTER THO THUNG") ; 0xB6 (?,T7(B consonant "LETTER THO THAHAN") ; 0xB7 (?,T8(B consonant "LETTER THO THONG") ; 0xB8 (?,T9(B consonant "LETTER NO NU") ; 0xB9 (?,T:(B consonant "LETTER BO BAIMAI") ; 0xBA (?,T;(B consonant "LETTER PO PLA") ; 0xBB (?,T<(B consonant "LETTER PHO PHUNG") ; 0xBC (?,T=(B consonant "LETTER FO FA") ; 0xBD (?,T>(B consonant "LETTER PHO PHAN") ; 0xBE (?,T?(B consonant "LETTER FO FAN") ; 0xBF (?,T@(B consonant "LETTER PHO SAMPHAO") ; 0xC0 (?,TA(B consonant "LETTER MO MA") ; 0xC1 (?,TB(B consonant "LETTER YO YAK") ; 0xC2 (?,TC(B consonant "LETTER RO RUA") ; 0xC3 (?,TD(B vowel-base "LETTER RU (Pali vowel letter)") ; 0xC4 (?,TE(B consonant "LETTER LO LING") ; 0xC5 (?,TF(B vowel-base "LETTER LU (Pali vowel letter)") ; 0xC6 (?,TG(B consonant "LETTER WO WAEN") ; 0xC7 (?,TH(B consonant "LETTER SO SALA") ; 0xC8 (?,TI(B consonant "LETTER SO RUSI") ; 0xC9 (?,TJ(B consonant "LETTER SO SUA") ; 0xCA (?,TK(B consonant "LETTER HO HIP") ; 0xCB (?,TL(B consonant "LETTER LO CHULA") ; 0xCC (?,TM(B consonant "LETTER O ANG") ; 0xCD (?,TN(B consonant "LETTER HO NOK HUK") ; 0xCE (?,TO(B special "PAI YAN NOI (abbreviation)") ; 0xCF (?,TP(B vowel-base "VOWEL SIGN SARA A") ; 0xD0 (?,TQ(B vowel-upper "VOWEL SIGN MAI HAN-AKAT N/S-T") ; 0xD1 (?,TR(B vowel-base "VOWEL SIGN SARA AA") ; 0xD2 (?,TS(B vowel-base "VOWEL SIGN SARA AM") ; 0xD3 (?,TT(B vowel-upper "VOWEL SIGN SARA I N/S-T") ; 0xD4 (?,TU(B vowel-upper "VOWEL SIGN SARA II N/S-T") ; 0xD5 (?,TV(B vowel-upper "VOWEL SIGN SARA UE N/S-T") ; 0xD6 (?,TW(B vowel-upper "VOWEL SIGN SARA UEE N/S-T") ; 0xD7 (?,TX(B vowel-lower "VOWEL SIGN SARA U N/S-B") ; 0xD8 (?,TY(B vowel-lower "VOWEL SIGN SARA UU N/S-B") ; 0xD9 (?,TZ(B vowel-lower "VOWEL SIGN PHINTHU N/S-B (Pali virama)") ; 0xDA (?,T[(B invalid nil) ; 0xDA (?,T\(B invalid nil) ; 0xDC (?,T](B invalid nil) ; 0xDC (?,T^(B invalid nil) ; 0xDC (?,T_(B special "BAHT SIGN (currency symbol)") ; 0xDF (?,T`(B vowel-base "VOWEL SIGN SARA E") ; 0xE0 (?,Ta(B vowel-base "VOWEL SIGN SARA AE") ; 0xE1 (?,Tb(B vowel-base "VOWEL SIGN SARA O") ; 0xE2 (?,Tc(B vowel-base "VOWEL SIGN SARA MAI MUAN") ; 0xE3 (?,Td(B vowel-base "VOWEL SIGN SARA MAI MALAI") ; 0xE4 (?,Te(B vowel-base "LAK KHANG YAO") ; 0xE5 (?,Tf(B special "MAI YAMOK (repetion)") ; 0xE6 (?,Tg(B sign-upper "VOWEL SIGN MAI TAI KHU N/S-T") ; 0xE7 (?,Th(B tone "TONE MAI EK N/S-T") ; 0xE8 (?,Ti(B tone "TONE MAI THO N/S-T") ; 0xE9 (?,Tj(B tone "TONE MAI TRI N/S-T") ; 0xEA (?,Tk(B tone "TONE MAI CHATTAWA N/S-T") ; 0xEB (?,Tl(B sign-upper "THANTHAKHAT N/S-T (cancellation mark)") ; 0xEC (?,Tm(B sign-upper "NIKKHAHIT N/S-T (final nasal)") ; 0xED (?,Tn(B sign-upper "YAMAKKAN N/S-T") ; 0xEE (?,To(B special "FONRMAN") ; 0xEF (?,Tp(B special "DIGIT ZERO") ; 0xF0 (?,Tq(B special "DIGIT ONE") ; 0xF1 (?,Tr(B special "DIGIT TWO") ; 0xF2 (?,Ts(B special "DIGIT THREE") ; 0xF3 (?,Tt(B special "DIGIT FOUR") ; 0xF4 (?,Tu(B special "DIGIT FIVE") ; 0xF5 (?,Tv(B special "DIGIT SIX") ; 0xF6 (?,Tw(B special "DIGIT SEVEN") ; 0xF7 (?,Tx(B special "DIGIT EIGHT") ; 0xF8 (?,Ty(B special "DIGIT NINE") ; 0xF9 (?,Tz(B special "ANGKHANKHU (ellipsis)") ; 0xFA (?,T{(B special "KHOMUT (beginning of religious texts)") ; 0xFB (?,T|(B invalid nil) ; 0xFC (?,T}(B invalid nil) ; 0xFD (?,T~(B invalid nil) ; 0xFE ;; Unicode equivalents (?$,1Ba(B consonant "LETTER KO KAI") (?$,1Bb(B consonant "LETTER KHO KHAI") (?$,1Bc(B consonant "LETTER KHO KHUAT") (?$,1Bd(B consonant "LETTER KHO KHWAI") (?$,1Be(B consonant "LETTER KHO KHON") (?$,1Bf(B consonant "LETTER KHO RAKHANG") (?$,1Bg(B consonant "LETTER NGO NGU") (?$,1Bh(B consonant "LETTER CHO CHAN") (?$,1Bi(B consonant "LETTER CHO CHING") (?$,1Bj(B consonant "LETTER CHO CHANG") (?$,1Bk(B consonant "LETTER SO SO") (?$,1Bl(B consonant "LETTER CHO CHOE") (?$,1Bm(B consonant "LETTER YO YING") (?$,1Bn(B consonant "LETTER DO CHADA") (?$,1Bo(B consonant "LETTER TO PATAK") (?$,1Bp(B consonant "LETTER THO THAN") (?$,1Bq(B consonant "LETTER THO NANGMONTHO") (?$,1Br(B consonant "LETTER THO PHUTHAO") (?$,1Bs(B consonant "LETTER NO NEN") (?$,1Bt(B consonant "LETTER DO DEK") (?$,1Bu(B consonant "LETTER TO TAO") (?$,1Bv(B consonant "LETTER THO THUNG") (?$,1Bw(B consonant "LETTER THO THAHAN") (?$,1Bx(B consonant "LETTER THO THONG") (?$,1By(B consonant "LETTER NO NU") (?$,1Bz(B consonant "LETTER BO BAIMAI") (?$,1B{(B consonant "LETTER PO PLA") (?$,1B|(B consonant "LETTER PHO PHUNG") (?$,1B}(B consonant "LETTER FO FA") (?$,1B~(B consonant "LETTER PHO PHAN") (?$,1B(B consonant "LETTER FO FAN") (?$,1C (B consonant "LETTER PHO SAMPHAO") (?$,1C!(B consonant "LETTER MO MA") (?$,1C"(B consonant "LETTER YO YAK") (?$,1C#(B consonant "LETTER RO RUA") (?$,1C$(B vowel-base "LETTER RU (Pali vowel letter)") (?$,1C%(B consonant "LETTER LO LING") (?$,1C&(B vowel-base "LETTER LU (Pali vowel letter)") (?$,1C'(B consonant "LETTER WO WAEN") (?$,1C((B consonant "LETTER SO SALA") (?$,1C)(B consonant "LETTER SO RUSI") (?$,1C*(B consonant "LETTER SO SUA") (?$,1C+(B consonant "LETTER HO HIP") (?$,1C,(B consonant "LETTER LO CHULA") (?$,1C-(B consonant "LETTER O ANG") (?$,1C.(B consonant "LETTER HO NOK HUK") (?$,1C/(B special "PAI YAN NOI (abbreviation)") (?$,1C0(B vowel-base "VOWEL SIGN SARA A") (?$,1C1(B vowel-upper "VOWEL SIGN MAI HAN-AKAT N/S-T") (?$,1C2(B vowel-base "VOWEL SIGN SARA AA") (?$,1C3(B vowel-base "VOWEL SIGN SARA AM") (?$,1C4(B vowel-upper "VOWEL SIGN SARA I N/S-T") (?$,1C5(B vowel-upper "VOWEL SIGN SARA II N/S-T") (?$,1C6(B vowel-upper "VOWEL SIGN SARA UE N/S-T") (?$,1C7(B vowel-upper "VOWEL SIGN SARA UEE N/S-T") (?$,1C8(B vowel-lower "VOWEL SIGN SARA U N/S-B") (?$,1C9(B vowel-lower "VOWEL SIGN SARA UU N/S-B") (?$,1C:(B vowel-lower "VOWEL SIGN PHINTHU N/S-B (Pali virama)") (?$,1C?(B special "BAHT SIGN (currency symbol)") (?$,1C@(B vowel-base "VOWEL SIGN SARA E") (?$,1CA(B vowel-base "VOWEL SIGN SARA AE") (?$,1CB(B vowel-base "VOWEL SIGN SARA O") (?$,1CC(B vowel-base "VOWEL SIGN SARA MAI MUAN") (?$,1CD(B vowel-base "VOWEL SIGN SARA MAI MALAI") (?$,1CE(B vowel-base "LAK KHANG YAO") (?$,1CF(B special "MAI YAMOK (repetion)") (?$,1CG(B sign-upper "VOWEL SIGN MAI TAI KHU N/S-T") (?$,1CH(B tone "TONE MAI EK N/S-T") (?$,1CI(B tone "TONE MAI THO N/S-T") (?$,1CJ(B tone "TONE MAI TRI N/S-T") (?$,1CK(B tone "TONE MAI CHATTAWA N/S-T") (?$,1CL(B sign-upper "THANTHAKHAT N/S-T (cancellation mark)") (?$,1CM(B sign-upper "NIKKHAHIT N/S-T (final nasal)") (?$,1CN(B sign-upper "YAMAKKAN N/S-T") (?$,1CO(B special "FONRMAN") (?$,1CP(B special "DIGIT ZERO") (?$,1CQ(B special "DIGIT ONE") (?$,1CR(B special "DIGIT TWO") (?$,1CS(B special "DIGIT THREE") (?$,1CT(B special "DIGIT FOUR") (?$,1CU(B special "DIGIT FIVE") (?$,1CV(B special "DIGIT SIX") (?$,1CW(B special "DIGIT SEVEN") (?$,1CX(B special "DIGIT EIGHT") (?$,1CY(B special "DIGIT NINE") (?$,1CZ(B special "ANGKHANKHU (ellipsis)") (?$,1C[(B special "KHOMUT (beginning of religious texts)") )) elm) (while l (setq elm (car l) l (cdr l)) (let ((char (car elm)) (ptype (nth 1 elm))) (put-char-code-property char 'phonetic-type ptype) (cond ((eq ptype 'consonant) (modify-category-entry char ?c thai-category-table) (global-set-key (vector char) 'thai-self-insert-command)) ((memq ptype '(vowel-upper vowel-lower)) (modify-category-entry char ?v thai-category-table) (if (or (= char ?,TT(B) (= char ?$,1C4(B)) ;; Give category `I' to "SARA I". (modify-category-entry char ?I thai-category-table)) (global-set-key (vector char) 'thai-self-insert-command)) ((eq ptype 'tone) (modify-category-entry char ?t thai-category-table) (modify-category-entry char ?u thai-category-table) (global-set-key (vector char) 'thai-self-insert-command)) ((eq ptype 'sign-upper) (modify-category-entry char ?u thai-category-table) (if (or (= char ?,Tl(B) (= char ?$,1CL(B)) ;; Give category `U' to "THANTHAKHAT". (modify-category-entry char ?U thai-category-table)) (global-set-key (vector char) 'thai-self-insert-command))) (put-char-code-property char 'name (nth 2 elm))))) (defun thai-compose-syllable (beg end &optional category-set string) (or category-set (setq category-set (char-category-set (if string (aref string beg) (char-after beg))))) (if (aref category-set ?c) ;; Starting with a consonant. We do relative composition. (if string (compose-string string beg end) (compose-region beg end)) ;; Vowel tone sequence. (if string (compose-string string beg end (list (aref string beg) '(Bc . Bc) (aref string (1+ beg)))) (compose-region beg end (list (char-after beg) '(Bc . Bc) (char-after (1+ beg)))))) (- end beg)) ;;;###autoload (defun thai-compose-region (beg end) "Compose Thai characters in the region. When called from a program, expects two arguments, positions (integers or markers) specifying the region." (interactive "r") (let ((pos (point))) (save-restriction (narrow-to-region beg end) (goto-char (point-min)) (with-category-table thai-category-table (while (re-search-forward thai-composition-pattern nil t) (setq beg (match-beginning 0) end (match-end 0)) (if (and (> pos beg) (< pos end)) (setq pos end)) (thai-compose-syllable beg end (char-category-set (char-after beg)))))) (goto-char pos))) ;;;###autoload (defun thai-compose-string (string) "Compose Thai characters in STRING and return the resulting string." (with-category-table thai-category-table (let ((idx 0)) (while (setq idx (string-match thai-composition-pattern string idx)) (thai-compose-syllable idx (match-end 0) nil string) (setq idx (match-end 0))))) string) ;;;###autoload (defun thai-compose-buffer () "Compose Thai characters in the current buffer." (interactive) (thai-compose-region (point-min) (point-max))) ;;;###autoload (defun thai-post-read-conversion (len) (thai-compose-region (point) (+ (point) len)) len) ;;;###autoload (defun thai-composition-function (from to pattern &optional string) "Compose Thai text in the region FROM and TO. The text matches the regular expression PATTERN. Optional 4th argument STRING, if non-nil, is a string containing text to compose. The return value is number of composed characters." (when (and (not thai-auto-composition-mode) (< (1+ from) to)) (with-category-table thai-category-table (if string (if (eq (string-match thai-composition-pattern string from) from) (thai-compose-syllable from (match-end 0) nil string)) (if (save-excursion (goto-char from) (and (looking-at thai-composition-pattern) (setq to (match-end 0)))) (thai-compose-syllable from to)))))) (defun thai-auto-composition (beg end len) (with-category-table thai-category-table (let (category-set) (while (and (> beg (point-min)) (setq category-set (char-category-set (char-after (1- beg)))) (or (aref category-set ?v) (aref category-set ?u))) (setq beg (1- beg))) (if (and (> beg (point-min)) (aref (char-category-set (char-after (1- beg))) ?c)) (setq beg (1- beg))) (while (and (< end (point-max)) (setq category-set (char-category-set (char-after end))) (or (aref category-set ?v) (aref category-set ?u))) (setq end (1+ end))) (if (< beg end) (thai-compose-region beg end))))) (put 'thai-auto-composition-mode 'permanent-local t) ;;;###autoload (define-minor-mode thai-auto-composition-mode "Minor mode for automatically correct Thai character composition." :group 'mule (cond ((null thai-auto-composition-mode) (remove-hook 'after-change-functions 'thai-auto-composition)) (t (add-hook 'after-change-functions 'thai-auto-composition)))) ;; Thai-word-mode requires functions in the feature `thai-word'. (require 'thai-word) (defvar thai-word-mode-map (let ((map (make-sparse-keymap))) (define-key map [remap forward-word] 'thai-forward-word) (define-key map [remap backward-word] 'thai-backward-word) (define-key map [remap kill-word] 'thai-kill-word) (define-key map [remap backward-kill-word] 'thai-backward-kill-word) (define-key map [remap transpose-words] 'thai-transpose-words) map) "Keymap for `thai-word-mode'.") (define-minor-mode thai-word-mode "Minor mode to make word-oriented commands aware of Thai words. The commands affected are \\[forward-word], \\[backward-word], \\[kill-word], \\[backward-kill-word], \\[transpose-words], and \\[fill-paragraph]." :global t :group 'mule (cond (thai-word-mode ;; This enables linebreak between Thai characters. (modify-category-entry (make-char 'thai-tis620) ?|) ;; This enables linebreak at a Thai word boundary. (put-charset-property 'thai-tis620 'fill-find-break-point-function 'thai-fill-find-break-point)) (t (modify-category-entry (make-char 'thai-tis620) ?| nil t) (put-charset-property 'thai-tis620 'fill-find-break-point-function nil)))) ;; Function to call on entering the Thai language environment. (defun setup-thai-language-environment-internal () (thai-word-mode 1)) ;; Function to call on exiting the Thai language environment. (defun exit-thai-language-environment-internal () (thai-word-mode -1)) ;; (provide 'thai-util) ;;; arch-tag: 59425d6a-8cf9-4e06-a6ab-8ab7dc7a7a97 ;;; thai-util.el ends here