;;; knd-util.el --- Support for composing Kannada characters ;; Copyright (C) 2003 Free Software Foundation, Inc. ;; Maintainer: Maintainer: CHOWKSEY, Kailash C. ;; Keywords: multilingual, Kannada ;; 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 2, 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., 59 Temple Place - Suite 330, ;; Boston, MA 02111-1307, USA. ;; Created: Jul. 14. 2003 ;;; Commentary: ;; This file provides character(Unicode) to glyph(CDAC) conversion and ;; composition of Kannada script characters. ;;; Code: ;;;###autoload ;; Kannada Composable Pattern ;; C .. Consonants ;; V .. Vowel ;; H .. Virama ;; M .. Matra ;; V .. Vowel ;; (N .. Zerowidth Non Joiner) ;; (J .. Zerowidth Joiner. ) ;; 1. vowel ;; V(A)? ;; 2. syllable : maximum of 5 consecutive consonants. (e.g. kartsnya) ;; ((CH)?(CH)?(CH)?CH)?C(H|M?)? (defconst kannada-consonant "[$,1>u(B-$,1?9(B]") (defconst kannada-consonant-needs-twirl "[$,1>u>w(B-$,1>{>}(B-$,1>~? (B-$,1?"?$(B-$,1?+?-?0?3(B-$,1?9(B]\\($,1?M(B[$,1>u(B-$,1?9(B]\\)*[$,1?A?B?C?D>b(B]?$") (defconst kannada-composable-pattern (concat "\\([$,1>b(B-$,1>t?`>l(B]\\)\\|[$,1>c(B]" "\\|\\(" "\\(?:\\(?:[$,1>u(B-$,1?9(B]$,1?M(B\\)?\\(?:[$,1>u(B-$,1?9(B]$,1?M(B\\)?\\(?:[$,1>u(B-$,1?9(B]$,1?M(B\\)?[$,1>u(B-$,1?9(B]$,1?M(B\\)?" "[$,1>u(B-$,1?9(B]\\(?:$,1?M(B\\|[$,1?>(B-$,1?M?U?C(B]?\\)?" "\\)") "Regexp matching a composable sequence of Kannada characters.") (defun kannada-compose-region (from to) (interactive "r") (save-excursion (save-restriction (narrow-to-region from to) (goto-char (point-min)) (while (re-search-forward kannada-composable-pattern nil t) (kannada-compose-syllable-region (match-beginning 0) (match-end 0)))))) (defun kannada-compose-string (string) (with-temp-buffer (insert (decompose-string string)) (kannada-compose-region (point-min) (point-max)) (buffer-string))) (defun kannada-post-read-conversion (len) (save-excursion (save-restriction (let ((buffer-modified-p (buffer-modified-p))) (narrow-to-region (point) (+ (point) len)) (kannada-compose-region (point-min) (point-max)) (set-buffer-modified-p buffer-modified-p) (- (point-max) (point-min)))))) (defun kannada-range (from to) "Make the list of the integers of range FROM to TO." (let (result) (while (<= from to) (setq result (cons to result) to (1- to))) result)) (defun kannada-regexp-of-hashtbl-keys (hashtbl) "Return a regular expression that matches all keys in hashtable HASHTBL." (let ((max-specpdl-size 1000)) (regexp-opt (sort (let (dummy) (maphash (function (lambda (key val) (setq dummy (cons key dummy)))) hashtbl) dummy) (function (lambda (x y) (> (length x) (length y)))))))) (defun kannada-regexp-of-hashtbl-vals (hashtbl) "Return a regular expression that matches all values in hashtable HASHTBL." (let ((max-specpdl-size 1000)) (regexp-opt (sort (let (dummy) (maphash (function (lambda (key val) (setq dummy (cons val dummy)))) hashtbl) dummy) (function (lambda (x y) (> (length x) (length y)))))))) (defun kannada-composition-function (from to pattern &optional string) "Compose Kannada characters in REGION, or STRING if specified. Assume that the REGION or STRING must fully match the composable PATTERN regexp." (if string (kannada-compose-syllable-string string) (kannada-compose-syllable-region from to)) (- to from)) ;; Register a function to compose Kannada characters. (mapc (function (lambda (ucs) (aset composition-function-table (decode-char 'ucs ucs) (list (cons kannada-composable-pattern 'kannada-composition-function))))) (kannada-range #x0c80 #x0cff)) ;; Notes on conversion steps. ;; 1. chars to glyphs ;; ;; Rules will not be applied to the virama appeared at the end of the ;; text. Also, the preceding/following "r" will be treated as special case. ;; 2. glyphs reordering. ;; ;; The glyphs are split by virama, and each glyph groups are ;; re-ordered in the following order. ;; ;; Note that `consonant-glyph' mentioned here does not contain the ;; vertical bar (right modifier) attached at the right of the ;; consonant. ;; ;; If the glyph-group contains right modifier, ;; (1) consonant-glyphs/vowels ;; (2) spacing ;; (3) right modifier (may be matra) ;; (4) top matra ;; (5) preceding "r" ;; (7) following "r" ;; (8) bottom matra or virama. ;; ;; Otherwise, ;; (1) consonant-glyph/vowels, with nukta sign ;; (3) left matra ;; (4) top matra ;; (5) preceding "r" ;; (7) following "r" ;; (8) bottom matra or virama. ;; (2) spacing ;; 3. glyph to glyph ;; ;; For better display, some glyph display would be tuned. ;; 4. Composition. ;; ;; left modifiers will be attached at the left. ;; others will be attached right. ;; Problem:: ;; Can we generalize this methods to other Indian scripts? (defvar knd-char-glyph '(("$,1>e(B" . "$,43@(B") ("$,1>f(B" . "$,43A(B") ("$,1?>(B" . "$,44{(B") ("$,1>g(B" . "$,43B(B") ("$,1??(B" . nil) ("$,1>h(B" . "$,43C(B") ("$,1?@(B" . nil) ("$,1>i(B" . "$,43D(B") ("$,1?A(B" . "\$,44(B") ("$,1>j(B" . "$,43E(B") ("$,1?B(B" . "\$,45 (B") ("$,1>k(B" . "$,43F4(B") ("$,1?C(B" . "\$,45$(B") ("$,1?`(B" . "$,43F5 (B") ("$,1?D(B" . "\$,45%(B") ;;("$,1>l(B" . nil) ; not implemented. ;;("$,1?a(B" . nil) ("$,1>n(B" . "$,43G(B") ("$,1>o(B" . "$,43H(B") ("$,1>p(B" . "$,43I(B") ("$,1?F(B" . "\$,45&(B") ("$,1?G(B" . "\$,45&4~(B") ("$,1?H(B" . "\$,45&5'(B") ("$,1>r(B" . "$,43J(B") ("$,1?J(B" . "$,45&5 (B") ("$,1>s(B" . "$,43K(B") ("$,1?K(B" . "\$,45&5 4~(B") ("$,1>t(B" . "$,43L(B") ("$,1?L(B" . "\$,45((B") ("$,1>b(B" . "$,43M(B") ("$,1>c(B" . "$,43N(B") ("$,1>u?M(B" . "$,43O5)(B") ("$,1>u(B" . "$,43O(B") ("$,1>u??(B" . "$,43P(B") ("$,1>u?@(B" . "$,43P4~(B") ("$,1>v?M(B" . "$,43S5)(B") ("$,1>v(B" . "$,43S(B") ("$,1>v??(B" . "$,43T(B") ("$,1>v?@(B" . "$,43T4~(B") ("$,1>v?F(B" . "$,43S5&(B") ("$,1>v?G(B" . "$,43S5&4~(B") ("$,1>v?H(B" . "$,43S5&5'(B") ("$,1>v?J(B" . "$,43S5&5&5 (B") ("$,1>v?K(B" . "$,43S5&5&5 4~(B") ("$,1>v?L(B" . "$,43S5((B") ("$,1>w?M(B" . "$,43V5)(B") ("$,1>w(B" . "$,43V(B") ("$,1>w??(B" . "$,43W(B") ("$,1>w?@(B" . "$,43W4~(B") ("$,1>x?M(B" . "$,43Y5)(B") ("$,1>x(B" . "$,43Y(B") ("$,1>x??(B" . "$,43Z(B") ("$,1>x?@(B" . "$,43Z4~(B") ("$,1>y?M(B" . "$,43\5)(B") ("$,1>y(B" . "$,43\(B") ("$,1>z?M(B" . "$,43^5)(B") ("$,1>z(B" . "$,43^(B") ("$,1>z??(B" . "$,43_(B") ("$,1>z?@(B" . "$,43_4~(B") ("$,1>{?M(B" . "$,43a5)(B") ("$,1>{(B" . "$,43a(B") ("$,1>{??(B" . "$,43b(B") ("$,1>{?@(B" . "$,43b4~(B") ("$,1>|?M(B" . "$,43d5)(B") ("$,1>|(B" . "$,43d(B") ("$,1>|??(B" . "$,43f(B") ("$,1>|?@(B" . "$,43f4~(B") ("$,1>|?F(B" . "$,43e5&(B") ("$,1>|?G(B" . "$,43e5&4~(B") ("$,1>|?H(B" . "$,43e5&5'(B") ("$,1>|?J(B" . "$,43e5&5&5 (B") ("$,1>|?K(B" . "$,43e5&5&5 4~(B") ("$,1>|?L(B" . "$,43e5((B") ("$,1>}?M(B" . "$,44a4z3h45)(B") ("$,1>}(B" . "$,44a4z3h4(B") ("$,1>}??(B" . "$,44b3h4(B") ("$,1>}?@(B" . "$,44b3h44~(B") ("$,1>}?B(B". "$,44a4z3h5 (B") ("$,1>}?J(B". "$,44a5&3h5 (B") ("$,1>}?K(B". "$,44a5&3h5 4~(B") ("$,1>~?M(B" . "$,43j5)(B") ("$,1>~(B" . "$,43j(B") ("$,1>?M(B" . "$,43m5)(B") ("$,1>(B" . "$,43l(B") ("$,1?#?>(B" . "$,43m4{(B") ("$,1>??(B" . "$,43n(B") ("$,1>?@(B" . "$,43n4~(B") ("$,1>?F(B" . "$,43m5&(B") ("$,1>?G(B" . "$,43m5&4~(B") ("$,1>?H(B" . "$,43m5&5'(B") ("$,1>?J(B" . "$,43m5&5&5 (B") ("$,1>?K(B" . "$,43m5&5&5 4~(B") ("$,1>?L(B" . "$,43m5((B") ("$,1? ?M(B" . "$,43p5)(B") ("$,1? (B" . "$,43p(B") ("$,1? ??(B" . "$,43q(B") ("$,1? ?@(B" . "$,43q4~(B") ("$,1?!?M(B" . "$,43s5)(B") ("$,1?!(B" . "$,43s(B") ("$,1?!??(B" . "$,43t(B") ("$,1?!?@(B" . "$,43t4~(B") ("$,1?"?M(B" . "$,43v5)(B") ("$,1?"(B" . "$,43v(B") ("$,1?"??(B" . "$,43w(B") ("$,1?"?@(B" . "$,43w4~(B") ("$,1?#?M(B" . "$,43z5)(B") ("$,1?#(B" . "$,43y(B") ("$,1?#?>(B" . "$,43z4{(B") ("$,1?#??(B" . "$,43{(B") ("$,1?#?@(B" . "$,43{4~(B") ("$,1?#?F(B" . "$,43z5&(B") ("$,1?#?G(B" . "$,43z5&4~(B") ("$,1?#?H(B" . "$,43z5&5'(B") ("$,1?#?J(B" . "$,43z5&5&5 (B") ("$,1?#?K(B" . "$,43z5&5&5 4~(B") ("$,1?#?L(B" . "$,43z5((B") ("$,1?$?M(B" . "$,43}5)(B") ("$,1?$(B" . "$,43}(B") ("$,1?$??(B" . "$,43~(B") ("$,1?$?@(B" . "$,43~4~(B") ("$,1?%?M(B" . "$,44B5)(B") ("$,1?%(B" . "$,44B(B") ("$,1?%??(B" . "$,44C(B") ("$,1?%?@(B" . "$,44C4~(B") ("$,1?&?M(B" . "$,44E5)(B") ("$,1?&(B" . "$,44E(B") ("$,1?&??(B" . "$,44F(B") ("$,1?&?@(B" . "$,44F4~(B") ("$,1?'?M(B" . "$,44H5)(B") ("$,1?'(B" . "$,44H(B") ("$,1?'??(B" . "$,44I(B") ("$,1?'?@(B" . "$,44I4~(B") ("$,1?(?M(B" . "$,44K5)(B") ("$,1?((B" . "$,44K(B") ("$,1?(??(B" . "$,44L(B") ("$,1?(?@(B" . "$,44L4~(B") ("$,1?*?M(B" . "$,44N5)(B") ("$,1?*(B" . "$,44N(B") ("$,1?*??(B" . "$,44O(B") ("$,1?*?@(B" . "$,44O4~(B") ("$,1?*?A(B" . "$,44N5"(B") ("$,1?*?B(B" . "$,44N5#(B") ("$,1?*?J(B" . "$,44N5&5#(B") ("$,1?*?K(B" . "$,44N5&5#4~(B") ("$,1?+?M(B" . "$,44Q5)(B") ("$,1?+(B" . "$,44Q(B") ("$,1?+??(B" . "$,44R(B") ("$,1?+?@(B" . "$,44R4~(B") ("$,1?+?A(B" . "$,44Q5"(B") ("$,1?+?B(B" . "$,44Q5#(B") ("$,1?+?J(B" . "$,44Q5&5#(B") ("$,1?+?K(B" . "$,44Q5&5#4~(B") ("$,1?,?M(B" . "$,44W5)(B") ("$,1?,(B" . "$,44V(B") ("$,1?,?>(B". "$,44W4{(B") ("$,1?,??(B" . "$,44X(B") ("$,1?,?@(B" . "$,44X4~(B") ("$,1?,?F(B" . "$,44W5&(B") ("$,1?,?G(B" . "$,44W5&4~(B") ("$,1?,?H(B" . "$,44W5&5'(B") ("$,1?,?J(B" . "$,44W5&5&5 (B") ("$,1?,?K(B" . "$,44W5&5&5 4~(B") ("$,1?,?L(B" . "$,44W5((B") ("$,1?-?M(B" . "$,44Z5)(B") ("$,1?-(B" . "$,44Z(B") ("$,1?-??(B" . "$,44[(B") ("$,1?-?@(B" . "$,44[4~(B") ("$,1?.?M(B" . "$,44h5!5)(B") ("$,1?.(B" . "$,44h4z4(B") ("$,1?.?>(B" . "$,44h4z5!4{(B") ("$,1?.??(B" . "$,44i4(B") ("$,1?.?@(B" . "$,44i44~(B") ("$,1?.?J(B". "$,44h5&5 (B") ("$,1?.?K(B". "$,44h5&5 4~(B") ("$,1?/?M(B" . "$,44^4z5!5)(B") ("$,1?/(B" . "$,44^4z4(B") ("$,1?/?>(B" . "$,44^4z5!4{(B")("$,1?/??(B" . "$,44_4(B") ("$,1?/?@(B" . "$,44_44~(B") ("$,1?/?J(B" . "$,44^5&5 (B") ("$,1?/?K(B" . "$,44^5&5 4~(B") ("$,1?0?M(B" . "$,44a5)(B") ("$,1?0(B" . "$,44a(B") ("$,1?0??(B" . "$,44b(B") ("$,1?0?@(B" . "$,44b4~(B") ("$,1?0?M(B" . "$,44a5)(B") ("$,1?0(B" . "$,44a(B") ("$,1?0??(B" . "$,44b(B") ("$,1?0?@(B" . "$,44b4~(B") ("$,1?2?M(B" . "$,44e5)(B") ("$,1?2(B" . "$,44d(B") ("$,1?2?>(B" . "$,44e4{(B") ("$,1?2??(B" . "$,44f(B") ("$,1?2?@(B" . "$,44f4~(B") ("$,1?2?F(B" . "$,44e5&(B") ("$,1?2?G(B" . "$,44e5&4~(B") ("$,1?2?H(B" . "$,44e5&5'(B") ("$,1?2?J(B" . "$,44e5&5&5 (B") ("$,1?2?K(B" . "$,44e5&5&5 4~(B") ("$,1?2?L(B" . "$,44e5((B") ("$,1?5?M(B" . "$,44h5)(B") ("$,1?5(B" . "$,44h(B") ("$,1?5??(B" . "$,44i(B") ("$,1?5?@(B" . "$,44i4~(B") ("$,1?5?A(B" . "$,44h5"(B") ("$,1?5?B(B" . "$,44h5#(B") ("$,1?5?J(B" . "$,44h5&5#(B") ("$,1?5?K(B" . "$,44h5&5#4~(B") ("$,1?6?M(B" . "$,44k5)(B") ("$,1?6(B" . "$,44k(B") ("$,1?6??(B" . "$,44l(B") ("$,1?6?@(B" . "$,44l4~(B") ("$,1?7?M(B" . "$,44n5)(B") ("$,1?7(B" . "$,44n(B") ("$,1?7??(B" . "$,44o(B") ("$,1?7?@(B" . "$,44o4~(B") ("$,1?8?M(B" . "$,44q5)(B") ("$,1?8(B" . "$,44q(B") ("$,1?8??(B" . "$,44r(B") ("$,1?8?@(B" . "$,44r4~(B") ("$,1?9?M(B" . "$,44t5)(B") ("$,1?9(B" . "$,44t(B") ("$,1?9??(B" . "$,44u(B") ("$,1?9?@(B" . "$,44u4~(B") ("$,1?3?M(B" . "$,44w5)(B") ("$,1?3(B" . "$,44w(B") ("$,1?3??(B" . "$,44x(B") ("$,1?3?@(B" . "$,44x4~(B")) "Kannada characters to glyphs conversion table. Default value contains only the basic rules.") (defvar knd-char-glyph-hash (let* ((hash (make-hash-table :test 'equal))) (mapc (function (lambda (x) (puthash (car x) (cdr x) hash))) knd-char-glyph) hash)) (defvar knd-char-glyph-regexp (kannada-regexp-of-hashtbl-keys knd-char-glyph-hash)) (defvar knd-conjunct-glyph '(("$,1>u(B" . "$,43Q(B") ("$,1>v(B" . "$,43U(B") ("$,1>w(B" . "$,43X(B") ("$,1>x(B" . "$,43[(B") ("$,1>y(B" . "$,43](B") ("$,1>z(B" . "$,43`(B") ("$,1>{(B" . "$,43c(B") ("$,1>|(B" . "$,43g(B") ("$,1>}(B" . "$,43i(B") ("$,1>~(B" . "$,43k(B") ("$,1>(B" . "$,43o(B") ("$,1? (B" . "$,43r(B") ("$,1?!(B" . "$,43u(B") ("$,1?"(B" . "$,43x(B") ("$,1?#(B" . "$,43|(B") ("$,1?$(B" . "$,44A(B") ("$,1?%(B" . "$,44D(B") ("$,1?&(B" . "$,44G(B") ("$,1?'(B" . "$,44J(B") ("$,1?((B" . "$,44M(B") ("$,1?*(B" . "$,44P(B") ("$,1?+(B" . "$,44U(B") ("$,1?,(B" . "$,44Y(B") ("$,1?-(B" . "$,44\(B") ("$,1?.(B" . "$,44](B") ("$,1?/(B" . "$,44`(B") ("$,1?0(B" . "$,44c(B") ("$,1?2(B" . "$,44g(B") ("$,1?3(B" . "$,44y(B") ("$,1?5(B" . "$,44j(B") ("$,1?6(B" . "$,44m(B") ("$,1?7(B" . "$,44p(B") ("$,1?8(B" . "$,44s(B") ("$,1?9(B" . "$,44v(B")) "Kannada characters to conjunct glyphs conversion table.") (defvar knd-conjunct-glyph-hash (let* ((hash (make-hash-table :test 'equal))) (mapc (function (lambda (x) (puthash (car x) (cdr x) hash))) knd-conjunct-glyph) hash)) (defvar knd-conjunct-glyph-regexp (kannada-regexp-of-hashtbl-vals knd-conjunct-glyph-hash)) (mapc (function (lambda (x) (put-char-code-property (aref (cdr x) 0) 'reference-point '(5 . 3)))) knd-conjunct-glyph) ;; glyph-to-glyph conversion table. ;; it is supposed that glyphs are ordered in ;; [consonant/nukta] - [matra/virama] - [preceding-r] - [anuswar]. (defvar knd-glyph-glyph '(("$,45$4A(B" . "$,45*(B") ("$,45'4A(B" . "$,45+(B") ("$,44A3g(B" . "$,45,(B") ("$,45$3Q(B" . "$,45-(B"))) (defvar knd-glyph-glyph-hash (let* ((hash (make-hash-table :test 'equal))) (mapc (function (lambda (x) (puthash (car x) (cdr x) hash))) knd-glyph-glyph) hash)) (defvar knd-glyph-glyph-regexp (kannada-regexp-of-hashtbl-keys knd-glyph-glyph-hash)) (defun knd-charseq (from &optional to) (if (null to) (setq to from)) (mapcar (function (lambda (x) (indian-glyph-char x 'kannada))) (kannada-range from to))) (defvar knd-glyph-cv (append (knd-charseq #x40 #x50) (knd-charseq #x52 #x54) (knd-charseq #x56 #x57) (knd-charseq #x59 #x5a) (knd-charseq #x5c) (knd-charseq #x5e #x5f) (knd-charseq #x61 #x62) (knd-charseq #x64 #x66) (knd-charseq #x6a) (knd-charseq #x6c #x6e) (knd-charseq #x70 #x71) (knd-charseq #x73 #x74) (knd-charseq #x76 #x77) (knd-charseq #x79 #x7b) (knd-charseq #x7d #x7e) (knd-charseq #xa2 #xa3) (knd-charseq #xa5 #xa6) (knd-charseq #xa8 #xa9) (knd-charseq #xab #xac) (knd-charseq #xae #xaf) (knd-charseq #xb1 #xb2) (knd-charseq #xb6 #xb8) (knd-charseq #xb6 #xb8) (knd-charseq #xba #xbb) (knd-charseq #xbe #xbf) (knd-charseq #xc1 #xc2) (knd-charseq #xc4 #xc6) (knd-charseq #xc8 #xc9) (knd-charseq #xcb #xcc) (knd-charseq #xce #xcf) (knd-charseq #xd1 #xd2) (knd-charseq #xd4 #xd5) (knd-charseq #xd7 #xd8) (knd-charseq #xc3)) "Kannada Consonants/Vowels/Nukta Glyphs") (defvar knd-glyph-space (knd-charseq #xb3 #xb4) "Kannada Spacing Glyphs") (defvar knd-glyph-right-modifier (append (knd-charseq #xdb #xdd) (knd-charseq #xdf) (knd-charseq #xe0 #xe3) (knd-charseq #xe9)) "Kannada Modifiers attached at the right side.") (defvar knd-glyph-right-modifier-regexp (concat "[" knd-glyph-right-modifier "]")) (defvar knd-glyph-jha-tail (knd-charseq #x68) "Kannada tail for jha.") (defvar knd-glyph-top-matra (append (knd-charseq #xda) (knd-charseq #xdd) (knd-charseq #xe6) (knd-charseq #xe8)) "Kannada Matras attached at the top side.") (defvar knd-glyph-bottom-matra (append (knd-charseq #xe4 #xe5) (knd-charseq #xe7)) "Kannada Matras attached at the bottom.") (defvar knd-glyph-end-marks (append (knd-charseq #x25) (knd-charseq #x4d #x4e) (knd-charseq #xde)) "Kannada end marks: arkavattu, virama, au and diirghaa.") (defvar knd-glyph-bottom-modifier (append (knd-charseq #x51) (knd-charseq #x55) (knd-charseq #x58) (knd-charseq #x5b) (knd-charseq #x5d) (knd-charseq #x60) (knd-charseq #x63) (knd-charseq #x67) (knd-charseq #x69) (knd-charseq #x6b) (knd-charseq #x6f) (knd-charseq #x72) (knd-charseq #x75) (knd-charseq #x78) (knd-charseq #x7c) (knd-charseq #xa1) (knd-charseq #xa4) (knd-charseq #xa7) (knd-charseq #xaa) (knd-charseq #xad) (knd-charseq #xb0) (knd-charseq #xb5) (knd-charseq #xb9) (knd-charseq #xbc #xbd) (knd-charseq #xc0) (knd-charseq #xc3) (knd-charseq #xc7) (knd-charseq #xca) (knd-charseq #xcd) (knd-charseq #xd0) (knd-charseq #xd3) (knd-charseq #xd6) (knd-charseq #xd9) (knd-charseq #xea #xef)) "Kannada Modifiers attached at the bottom.") (defvar knd-glyph-order `((,knd-glyph-cv . 1) (,knd-glyph-top-matra . 2) (,knd-glyph-jha-tail . 3) (,knd-glyph-right-modifier . 4) (,knd-glyph-space . 5) (,knd-glyph-bottom-modifier . 5) (,knd-glyph-bottom-matra . 6) (,knd-glyph-end-marks . 7) )) (mapc (function (lambda (x) (mapc (function (lambda (y) (put-char-code-property y 'composition-order (cdr x)))) (car x)))) knd-glyph-order) (defun kannada-compose-syllable-string (string) (with-temp-buffer (insert (decompose-string string)) (kannada-compose-syllable-region (point-min) (point-max)) (buffer-string))) ;; kch (defun kannada-compose-syllable-region (from to) "Compose kannada syllable in region FROM to TO." (let ((glyph-str nil) (cons-num 0) (glyph-str-list nil) (last-virama nil) (preceding-r nil) (last-modifier nil) (last-char (char-before to)) match-str pos glyph-block split-pos (conj nil) (rest nil)) (save-excursion (save-restriction ;;; *** char-to-glyph conversion *** ;; Special rule 1. -- Last virama must be preserved. (if (eq last-char ?$,1?M(B) (progn (setq last-virama t) (narrow-to-region from (1- to))) (narrow-to-region from to)) (goto-char (point-min)) ;; Special rule 2. -- preceding "r virama" must be modifier. (when (looking-at "$,1?0?M(B.") (setq preceding-r t) (goto-char (+ 2 (point)))) ;; remove conjunct consonants (while (re-search-forward knd-char-glyph-regexp nil t) (setq match-str (match-string 0)) (if (and (string-match kannada-consonant match-str) (> cons-num 0)) (progn (setq conj (concat conj (gethash (match-string 0 match-str) knd-conjunct-glyph-hash))) (setq match-str (replace-match "" t nil match-str)) (if (string-match "$,1?M(B" rest) (setq rest (replace-match "" t nil rest))))) (setq rest (concat rest match-str)) ;; count the number of consonant-glyhs. (if (string-match kannada-consonant match-str) (setq cons-num (1+ cons-num)))) ;; translate the rest characters into glyphs (setq pos 0) (while (string-match knd-char-glyph-regexp rest pos) (setq match-str (match-string 0 rest)) (setq pos (match-end 0)) (setq glyph-str (concat glyph-str (gethash match-str knd-char-glyph-hash)))) (if conj (setq glyph-str (concat glyph-str conj))) (if last-virama (setq glyph-str (concat glyph-str "$,45)(B")) (goto-char (point-min)) (if (re-search-forward kannada-consonant-needs-twirl nil t) (progn (setq match-str (match-string 0)) (setq glyph-str (concat glyph-str "$,44z(B"))))) ;; preceding-r must be attached (if preceding-r (setq glyph-str (concat glyph-str "$,43%(B"))) ;;; *** glyph-to-glyph conversion *** (when (string-match knd-glyph-glyph-regexp glyph-str) (setq glyph-str (replace-match (gethash (match-string 0 glyph-str) knd-glyph-glyph-hash) nil t glyph-str))) ;;; *** glyph reordering *** (while (setq split-pos (string-match "$,45)(B\\|.$" glyph-str)) (setq glyph-block (substring glyph-str 0 (1+ split-pos))) (setq glyph-str (substring glyph-str (1+ split-pos))) (setq glyph-block (sort (string-to-list glyph-block) (function (lambda (x y) (< (get-char-code-property x 'composition-order) (get-char-code-property y 'composition-order)))))) (setq glyph-str-list (nconc glyph-str-list glyph-block))) ;;; *** insert space glyphs for kerning *** (if (> cons-num 0) (let ((curr glyph-str-list) (prev nil) (last-bott nil) bott co) (while curr (setq co (get-char-code-property (car curr) 'composition-order) bott (or (eq co 5) (eq co 6))) (if (and bott last-bott) (setcdr prev (cons ?$,44T(B curr))) (setq last-bott bott prev curr curr (cdr curr))))) ;; concatenate and attach reference-points. (setq glyph-str (cdr (apply 'nconc (mapcar (function (lambda (x) (list (or (get-char-code-property x 'reference-point) '(5 . 3) ;; default reference point. ) x))) glyph-str-list)))))) (compose-region from to glyph-str))) (provide 'knd-util) ;;; knd-util.el ends here