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emacs/lisp/language/devan-util.el

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Initial revision
1997-02-20 07:02:49 +00:00
;;; devan-util.el --- Support for Devanagari Script Composition
;; Copyright (C) 1996 Free Software Foundation, Inc.
;; Author: KAWABATA, Taichi <kawabata@is.s.u-tokyo.ac.jp>
;; Keywords: multilingual, Indian, Devanagari
;; 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
Fix FSF address in comment.
1997-02-23 09:20:52 +00:00
;; 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.
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;;; Commentary:
;; History:
;; 1996.10.18 written by KAWABATA, Taichi <kawabata@is.s.u-tokyo.ac.jp>
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;; 1997.1.20 fixed some bugs.
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;; Devanagari script composition rules and related programs.
;;; Code:
;;;
;;; Steps toward composition of Devanagari Characters.
;;;
;;; Basic functions.
;;;###autoload
(defun indian-to-devanagari (ch)
"Convert IS 13194 characters to Devanagari basic characters."
(let ((charcodes (split-char ch)))
(if (eq (car charcodes) 'indian-is13194)
(make-char 'indian-2-column ?\x21 (nth 1 charcodes))
ch)))
;;;###autoload
(defun devanagari-to-indian (ch)
"Convert Devanagari basic characters to IS 13194 characters."
(let* ((charcodes (split-char ch))
(charset (car charcodes))
(code-h (car (cdr charcodes))))
(if (and (eq (car charcodes) 'indian-2-column)
(= (nth 1 charcodes) ?\x21))
(make-char 'indian-is13194 (nth 2 charcodes))
ch)))
;;;###autoload
(defun indian-to-devanagari-region (from to)
"Convert IS 13194 characters in region to Devanagari basic characters."
(interactive "r")
(save-restriction
(narrow-to-region from to)
(goto-char (point-min))
(while (re-search-forward "\\cd" nil t)
(let* ((devanagari-char (indian-to-devanagari (preceding-char))))
(delete-char -1)
(insert devanagari-char)))))
;;;###autoload
(defun devanagari-to-indian-region (from to)
"Convert Devanagari basic characters in region to Indian characters."
(interactive "r")
(save-restriction
(narrow-to-region from to)
(goto-char (point-min))
(while (re-search-forward "\\cD" nil t) ; Devanagari Character Code.
(let* ((indian-char (devanagari-to-indian (preceding-char))))
(delete-char -1)
(insert indian-char)))))
;;;###autoload
(defun indian-to-devanagari-string (str)
"Convert Indian String to Devanagari Basic Character String."
(let ((pos 0) (dst "") (src str) char)
(while (not (equal src ""))
(setq char (string-to-char src))
(setq src (substring src (char-bytes char)))
(setq dst (concat dst (char-to-string (indian-to-devanagari char)))))
dst))
;; Phase 0 - Determine whether the characters can be composed.
;;
;;;
;;; Regular expressions to split characters for composition.
;;;
;;
;; Indian script word contains one or more syllables.
;; In BNF, it can be expressed as follows:
;;
;; Word ::= {Syllable} [Cons-Syllable]
;; Syllable ::= Cons-Vowel-Syllable | Vowel-Syllable
;; Vowel-Syllable ::= V[D]
;; Cons-Vowel-Syllable ::= [Cons-Syllable] Full-Cons [M] [D]
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;; Cons-Syllable ::= [Pure-Cons] [Pure-Cons] [Pure-Cons] Pure-Cons
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;; Pure-Cons ::= Full-Cons H
;; Full-Cons ::= C [N]
;;
;; {} repeat, [] optional
;;
;; C - Consonant ($(5!3!4!5!6!7!8!9!:!;!<!=!>!?!@!A!B!C!D!E(B
;; $(5!F!G!H!I!J!K!L!M!N!O!P!Q!R!S!T!U!V!W!X(B)
;; N - Nukta ($(5!i(B)
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;; H - Halant($(5!h(B) or Virama
;; V - Vowel ($(5!$!%!&!'!(!)!*!+!,!-!.!/!0!1!2#&#'#*(B)
;; ("$(5#&#'#*(B" can be obtained by IS13194 vowels with nukta.)
;; D - Vowel Modifiers, i.e. Anuswar, Chandrabindu, Visarga ($(5!!!"!#(B)
;; M - Matra ($(5!Z![!\!]!^!_!`!a!b!c!d!e!f!g#K#L#M(B)
;; ("$(5#K#L#M(B" can be obtained by IS13194 matras with nukta.)
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;;
;; In Emacs, one syllable of Indian language is considered to be one
;; composite glyph. If we expand the above expression, it would be:
;;
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;; [[C [N] H] [C [N] H] [C [N] H] C [N] H] C [N] [M] [D] | V [D]
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;;
;; Therefore, in worst case, the consonant syllabe will consist of
;; following characters.
;;
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;; C N H C N H C N H C N H C N M D
;;
;; The example is a sanskrit word "kaurtsnya", where five consecutive
;; consonant appears.
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;;
;; On the other hand, incomplete consonant syllable before inputting
;; base consonant must satisfy the following condition:
;;
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;; [C [N] H] [C [N] H] [C [N] H] C [N] H
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;;
;; This is acceptable BEFORE proper consonant-syllable is input. The
;; string which doesn't match with the above expression is invalid and
;; thus must be fixed.
;;
;; Note:
;; Third case can be considered, which is acceptable syllable and can
;; not add any code more.
;;
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;; [[C [N] H] [C [N] H] [C [N] H] C [N] H] C [N] [M] D
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;;
;; However, to make editing possible even in this condition, we will
;; not consider about this case.
(defconst devanagari-cons-syllable-examine
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"\\(\\([$(5!3(B-$(5!X(B]$(5!i(B?$(5!h(B\\)?\\([$(5!3(B-$(5!X(B]$(5!i(B?$(5!h(B\\)?[$(5!3(B-$(5!X(B]$(5!i(B?$(5!h(B\\)?[$(5!3(B-$(5!X(B]$(5!i(B?\\([$(5!Z(B-$(5!g#K#L#M(B]\\|\\($(5!_!i(B\\)\\|\\($(5![!i(B\\)\\|\\($(5!\!i(B\\)\\)?[$(5!!!"!#(B]?"
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"Regexp matching to one Devanagari consonant syllable.")
(defconst devanagari-cons-syllable-incomplete-examine
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"\\([$(5!3(B-$(5!X(B]$(5!i(B?$(5!h(B\\)?\\([$(5!3(B-$(5!X(B]$(5!i(B?$(5!h(B\\)?\\([$(5!3(B-$(5!X(B]$(5!i(B?$(5!h(B\\)?[$(5!3(B-$(5!X(B]$(5!i(B?$(5!h(B$"
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"Regexp matching to one Devanagari incomplete consonant syllable.")
(defconst devanagari-vowel-syllable-examine
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"\\([$(5!$(B-$(5!2#&#'#*(B]\\|\\($(5!*!i(B\\)\\|\\($(5!&!i(B\\)\\|\\($(5!'!i(B\\)\\)[$(5!!!"!#(B]?"
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"Regexp matching to one Devanagari vowel syllable.")
;;
;; Also, digits and virams should be processed other than syllables.
;;
;; In IS 13194, Avagrah is obtained by Nukta after Viram, and
;; OM is obtained by Nukta after Chandrabindu
;;
(defconst devanagari-digit-viram-examine
"[$(5!q(B-$(5!z!j(B]")
(defconst devanagari-other-sign-examine
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"\\([$(5!!!j(B]$(5!i(B\\)\\|\\([$(5#!#J(B]\\)")
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(defconst devanagari-composite-glyph-unit-examine
(concat "\\(" devanagari-cons-syllable-incomplete-examine
"\\)\\|\\(" devanagari-vowel-syllable-examine
"\\)\\|\\(" devanagari-digit-viram-examine
"\\)\\|\\(" devanagari-cons-syllable-examine
"\\)\\|\\(" devanagari-other-sign-examine"\\)")
"Regexp matching to Devanagari string to be composed form one glyph.")
;;(put-charset-property charset-devanagari-1-column
;; 'char-to-glyph 'devanagari-compose-string)
;;(put-charset-property charset-devanagari-2-column
;; 'char-to-glyph 'devanagari-compose-string)
;; Sample
;;
;;(string-match devanagari-cons-syllable-examine "$(5!X![(B") => 0
;;(string-match devanagari-cons-syllable-examine "$(5!F!h!D!\(B") => 0
;;(string-match devanagari-cons-syllable-examine "$(5!X![!F!h!D!\(B") => 0
;;
;; Steps toward the composition
;; Converting Character Code to Composite Glyph.
;;
;; Example : $(5!X![(B/$(5!F!h!D!\(B
;;
;; First, convert Characters to appropriate glyphs.
;;
;; => $(5!X![(B/$(5"F!D!\(B
;;
;; Then, determine the base glyph, apply-orders and apply-rules.
;;
;; => $(5!X(B (ml.mr) $(5![(B / $(5!D(B (ml.mr) $(5"F(B (mr ml) $(5!\(B
;;
;; Finally, convert 2-column glyphs to 1-column glyph
;; if such a glyph exist.
;;
;; => $(6![(B (ml.mr) $(6!X(B / $(6!D(B (ml.mr) $(6"F(B (mr ml) $(6!\(B
;;
;; Compose the glyph.
;;
;; => 2$(6!X@![1(B/2$(6!D@"FP!\1(B
;; => 2$(6!X@![12!D@"FP!\1(B
;;
;;
;; Phase 1: Converting Character Code to Glyph Code.
;;
;;
;; IMPORTANT:
;; There may be many rules which you many want to be suppressed.
;; In that case, please comment out that rule.
;;
;; RULES WILL BE EVALUATED FROM FIRST TO LAST.
;; PUT MORE SPECIFIC RULES FIRST.
;;
;; TO DO:
;; Prepare multiple specific list of rules for each languages
;; which adopts Devanagari script.
;;
(defconst devanagari-char-to-glyph-rules
'(
;; special form for "ru".
("\\($(5!O!](B\\)" . "$(5",(B")
("\\($(5!O!^(B\\)" . "$(5"-(B")
("\\($(5!P!](B\\)" . "$(5".(B")
("\\($(5!P!^(B\\)" . "$(5"/(B")
;; `r' at the top of syllable and followed by other consonants.
;; ("[^$(5!h(B]\\($(5!O!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"p(B")
("^\\($(5!O!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"p(B")
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;; Half Form Ligature
;; Here is the half-form ligature which has higher priority than
;; the common ligature rules listed below.
;; special forms.
("\\($(5!3!h!V!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"l(B")
("\\($(5!:!h!<!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"m(B")
;; Ordinary forms.
("\\($(5!B!h!B!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"c(B")
("\\($(5!F!h!F!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"k(B")
Initial revision
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;; If "r" is preceded by the vowel-suppressed consonant
;; (especially those with vertical line), it will be written as
;; slanted line below the preceding consonant character. Some of
;; them are pre-composed as one glyph.
("\\($(5!:!i!h!O(B\\)" . "$(5"!(B")
("\\($(5!I!i!h!O(B\\)" . "$(5""(B")
("\\($(5!3!h!O(B\\)" . "$(5"#(B")
Fix handling of several characters.
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("\\($(5!5!h!O(B\\)" . "$(5"$(B")
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("\\($(5!B!h!O(B\\)" . "$(5"%(B")
("\\($(5!H!h!O(B\\)" . "$(5"&(B")
("\\($(5!I!h!O(B\\)" . "$(5"'(B")
Fix handling of several characters.
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("\\($(5!U!h!O(B\\)" . "$(5")(B")
;; Special Rules
;; In the following case, "$(5!<!h!:(B" ligature does not occur.
("\\($(5!<!h(B\\)$(5!:!h!<!h(B" . "$(5"<(B")
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;; Ligature Rules
("\\($(5!3!h!B!h!O!h!M(B\\)" . "$(5$!(B")
("\\($(5!3!h!B!h!T(B\\)" . "$(5$"(B")
("\\($(5!3!h!B!h!M(B\\)" . "$(5$#(B")
("\\($(5!3!h!F!h!M(B\\)" . "$(5$$(B")
("\\($(5!3!h!O!h!M(B\\)" . "$(5$%(B")
("\\($(5!3!h!T!h!M(B\\)" . "$(5$&(B")
("\\($(5!3!h!3(B\\)" . "$(5$'(B")
("\\($(5!3!h!B(B\\)" . "$(5$((B")
("\\($(5!3!h!F(B\\)" . "$(5$)(B")
("\\($(5!3!h!L(B\\)" . "$(5$*(B")
("\\($(5!3!h!M(B\\)" . "$(5$+(B")
("\\($(5!3!h!Q(B\\)" . "$(5$,(B")
("\\($(5!3!h!T(B\\)" . "$(5$-(B")
("\\($(5!3!h!V(B\\)" . "$(5$.(B")
("\\($(5!6!h!F(B\\)" . "$(5$/(B")
("\\($(5!7!h!3!h!B!h!M(B\\)" . "$(5$0(B")
("\\($(5!7!h!3!h!V!h!T(B\\)" . "$(5$1(B")
("\\($(5!7!h!3!h!B(B\\)" . "$(5$2(B")
("\\($(5!7!h!3!h!V(B\\)" . "$(5$3(B")
("\\($(5!7!h!6!h!O(B\\)" . "$(5$4(B")
("\\($(5!7!h!3!h!M(B\\)" . "$(5$5(B")
("\\($(5!7!h!4!h!M(B\\)" . "$(5$6(B")
("\\($(5!7!h!5!h!M(B\\)" . "$(5$7(B")
("\\($(5!7!h!6!h!M(B\\)" . "$(5$8(B")
("\\($(5!7!h!3(B\\)" . "$(5$9(B")
("\\($(5!7!h!4(B\\)" . "$(5$:(B")
("\\($(5!7!h!5(B\\)" . "$(5$;(B")
("\\($(5!7!h!6(B\\)" . "$(5$<(B")
("\\($(5!7!h!7(B\\)" . "$(5$=(B")
("\\($(5!7!h!F(B\\)" . "$(5$>(B")
("\\($(5!7!h!L(B\\)" . "$(5$?(B")
("\\($(5!7!h!M(B\\)" . "$(5$@(B")
("\\($(5!8!h!8(B\\)" . "$(5$A(B")
("\\($(5!8!h!<(B\\)" . "$(5$B(B")
("\\($(5!9!h!M(B\\)" . "$(5$C(B")
("\\($(5!:!h!O(B\\)" . "$(5$D(B")
Fix handling of several characters.
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("\\($(5!:!h!<(B\\)" . "$(5$E(B")
Initial revision
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("\\($(5!<!h!8(B\\)" . "$(5$F(B")
("\\($(5!<!h!:(B\\)" . "$(5$G(B")
("\\($(5!=!h!3(B\\)" . "$(5$H(B")
("\\($(5!=!h!=(B\\)" . "$(5$I(B")
("\\($(5!=!h!>(B\\)" . "$(5$J(B")
("\\($(5!=!h!M(B\\)" . "$(5$K(B")
("\\($(5!>!h!M(B\\)" . "$(5$L(B")
("\\($(5!?!h!5!h!M(B\\)" . "$(5$M(B")
("\\($(5!?!h!6!h!O(B\\)" . "$(5$N(B")
("\\($(5!?!h!O!h!M(B\\)" . "$(5$O(B")
("\\($(5!?!h!5(B\\)" . "$(5$P(B")
("\\($(5!?!h!6(B\\)" . "$(5$Q(B")
("\\($(5!?!h!?(B\\)" . "$(5$R(B")
("\\($(5!?!h!L(B\\)" . "$(5$S(B")
("\\($(5!?!h!M(B\\)" . "$(5$T(B")
("\\($(5!@!h!M(B\\)" . "$(5$`(B")
("\\($(5!B!h!B(B\\)" . "$(5$a(B")
("\\($(5!B!h!F(B\\)" . "$(5$b(B")
("\\($(5!D!h!D!h!M(B\\)" . "$(5$c(B")
("\\($(5!D!h!E!h!M(B\\)" . "$(5$d(B")
("\\($(5!D!h!K!h!M(B\\)" . "$(5$e(B")
("\\($(5!D!h!O!h!M(B\\)" . "$(5$f(B")
("\\($(5!D!h!T!h!M(B\\)" . "$(5$g(B")
("\\($(5!D!h!5!h!O(B\\)" . "$(5$h(B")
("\\($(5!D!h!6!h!O(B\\)" . "$(5$i(B")
("\\($(5!D!h!D!h!T(B\\)" . "$(5$j(B")
("\\($(5!D!h!E!h!T(B\\)" . "$(5$k(B")
("\\($(5!D!h!5(B\\)" . "$(5$l(B")
("\\($(5!D!h!6(B\\)" . "$(5$m(B")
("\\($(5!D!h!D(B\\)" . "$(5$n(B")
("\\($(5!D!h!E(B\\)" . "$(5$o(B")
("\\($(5!D!h!F(B\\)" . "$(5$p(B")
("\\($(5!D!h!J(B\\)" . "$(5$q(B")
("\\($(5!D!h!K(B\\)" . "$(5$r(B")
("\\($(5!D!h!L(B\\)" . "$(5$s(B")
("\\($(5!D!h!M(B\\)" . "$(5$t(B")
("\\($(5!D!h!T(B\\)" . "$(5$u(B")
("\\($(5!E!h!F(B\\)" . "$(5$v(B")
("\\($(5!F!h!F(B\\)" . "$(5$w(B")
("\\($(5!H!h!B(B\\)" . "$(5$x(B")
("\\($(5!H!h!F(B\\)" . "$(5$y(B")
("\\($(5!H!h!Q(B\\)" . "$(5$z(B")
("\\($(5!J!h!F(B\\)" . "$(5${(B")
("\\($(5!J!h!J(B\\)" . "$(5$|(B")
("\\($(5!J!h!T(B\\)" . "$(5$}(B")
("\\($(5!K!h!F(B\\)" . "$(5$~(B")
("\\($(5!L!h!F(B\\)" . "$(5#P(B")
("\\($(5!L!h!Q(B\\)" . "$(5#Q(B")
("\\($(5!Q!h!Q(B\\)" . "$(5#`(B")
("\\($(5!T!h!F(B\\)" . "$(5#a(B")
("\\($(5!T!h!T(B\\)" . "$(5#b(B")
("\\($(5!U!h!8(B\\)" . "$(5#c(B")
("\\($(5!U!h!F(B\\)" . "$(5#d(B")
("\\($(5!U!h!J(B\\)" . "$(5#e(B")
("\\($(5!U!h!Q(B\\)" . "$(5#f(B")
("\\($(5!U!h!T(B\\)" . "$(5#g(B")
("\\($(5!V!h!=!h!O!h!M(B\\)" . "$(5#h(B")
("\\($(5!V!h!=!h!M(B\\)" . "$(5#i(B")
("\\($(5!V!h!=!h!T(B\\)" . "$(5#j(B")
("\\($(5!V!h!=(B\\)" . "$(5#k(B")
("\\($(5!V!h!>(B\\)" . "$(5#l(B")
("\\($(5!W!h!F(B\\)" . "$(5#m(B")
("\\($(5!W!h!O(B\\)" . "$(5#n(B")
("\\($(5!X!h!A(B\\)" . "$(5#p(B")
("\\($(5!X!h!F(B\\)" . "$(5#q(B")
("\\($(5!X!h!L(B\\)" . "$(5#r(B")
("\\($(5!X!h!M(B\\)" . "$(5#s(B")
("\\($(5!X!h!O(B\\)" . "$(5#t(B")
("\\($(5!X!h!Q(B\\)" . "$(5#u(B")
("\\($(5!X!h!T(B\\)" . "$(5#v(B")
;; Special Ligature Rules
("\\($(5!X!_(B\\)" . "$(5#R(B")
;; Half form with ligature. Special "r" case is included. "r"
;; connection which is not listed here has not been examined yet.
;; I don't know what to do with them.
;;
;; ordinary forms
("\\($(5!5!h!O!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"`(B")
("\\($(5!6!h!F!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"a(B")
;; ("\\($(5!<!h!8!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"c(B") ; Mistake, must check later.
("\\($(5!B!h!O!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"d(B")
("\\($(5!E!h!F!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"e(B")
("\\($(5!E!h!O!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"f(B")
("\\($(5!H!h!B!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"g(B")
("\\($(5!U!h!8!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"h(B")
("\\($(5!U!h!O!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"i(B")
("\\($(5!U!h!T!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"j(B")
;; ("\\($(5!U!h!T!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"k(B") ; must check later.
;; Conjunction form associated with Nukta sign.
("\\($(5!3!i!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"s(B")
("\\($(5!4!i!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"t(B")
("\\($(5!5!i!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"u(B")
("\\($(5!:!i!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"z(B")
("\\($(5!I!i!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"y(B")
;; For consonants other than listed above, glyph-composition will
;; be applied. If the consonant which is preceding "$(5!O(B" does not
;; have the vertical line (such as "$(5!?(B"), "$(5"r(B" is put beneath the
;; consonant.
;;
("[$(5!7!9!=!>!?!@!D!O!P!R!S!X(B]\\($(5!h!O(B\\)" . "$(5"r(B")
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
("\\($(5!J!h!O(B\\)" . "$(5!J"r(B") ; Protect from Half form conversion.
("\\($(5!E!h!O(B\\)" . "$(5!E"r(B") ; Will be replaced with precomposed font.
("\\($(5!6!h!O(B\\)" . "$(5!6"r(B")
("\\($(5!K!h!O(B\\)" . "$(5!K"r(B")
("\\($(5!T!h!O(B\\)" . "$(5!T"r(B")
("\\($(5!L!h!O(B\\)" . "$(5!L"r(B")
("\\($(5!7!h!5!h!O(B\\)" . "$(5$;"r(B") ; Ggr
("\\($(5!7!h!3!h!O(B\\)" . "$(5$9"r(B") ; Gkr
Initial revision
1997-02-20 07:02:49 +00:00
("$(5!?!i(B\\($(5!h!O(B\\)" . "$(5"r(B")
("$(5!@!i(B\\($(5!h!O(B\\)" . "$(5"r(B")
;; Nukta
("\\($(5!!!i(B\\)" . "$(5#!(B")
("\\($(5!&!i(B\\)" . "$(5#&(B")
("\\($(5!'!i(B\\)" . "$(5#'(B")
("\\($(5!*!i(B\\)" . "$(5#*(B")
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
("\\($(5![!i(B\\)" . "$(5#L(B")
("\\($(5!\!i(B\\)" . "$(5#M(B")
("\\($(5!_!i(B\\)" . "$(5#K(B")
Initial revision
1997-02-20 07:02:49 +00:00
("\\($(5!3!i(B\\)" . "$(5#3(B")
("\\($(5!4!i(B\\)" . "$(5#4(B")
("\\($(5!5!i(B\\)" . "$(5#5(B")
("\\($(5!:!i(B\\)" . "$(5#:(B")
("\\($(5!?!i(B\\)" . "$(5#?(B")
("\\($(5!@!i(B\\)" . "$(5#@(B")
("\\($(5!I!i(B\\)" . "$(5#I(B")
("\\($(5!j!i(B\\)" . "$(5#J(B")
;; Half forms.
("\\($(5!3!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"3(B")
("\\($(5!4!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"4(B")
("\\($(5!5!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"5(B")
("\\($(5!6!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"6(B")
("\\($(5!8!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"8(B")
("\\($(5!:!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5":(B")
("\\($(5!;!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5";(B")
("\\($(5!<!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"<(B")
("\\($(5!A!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"A(B")
("\\($(5!B!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"B(B")
("\\($(5!C!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"C(B")
("\\($(5!E!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"E(B")
("\\($(5!F!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"F(B")
("\\($(5!G!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"G(B")
("\\($(5!H!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"H(B")
("\\($(5!I!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"I(B")
("\\($(5!J!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"J(B")
("\\($(5!K!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"K(B")
("\\($(5!L!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"L(B")
("\\($(5!M!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"M(B")
("\\($(5!N!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"N(B")
("\\($(5!Q!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"Q(B")
("\\($(5!R!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"R(B")
("\\($(5!S!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"S(B")
("\\($(5!T!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"T(B")
("\\($(5!U!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"U(B")
("\\($(5!V!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"V(B")
("\\($(5!W!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"W(B")
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
;; Special rule for "rR"
("\\($(5!O!_(B\\)" . "$(5!*"p(B")
;; If everything fails, "y" will connect to the front consonant.
("\\($(5!h!M(B\\)" . "$(5"](B")
Initial revision
1997-02-20 07:02:49 +00:00
)
"Alist of regexps of Devanagari character sequences vs composed characters.")
;; Example:
;;("\\($(5!F!h(B\\)[$(5!3(B-$(5!X(B]" . "$(5"F(B")
;;(string-match "\\($(5!F!h(B\\)[$(5!3(B-$(5!X(B]" "$(5!X![!F!h!D!\(B") => 8
;;(match-end 1) => 16
;;
;; Defining character properties : char-to-glyph, glyph-to-char
;;
;; * If char-to-glyph is non-nil, it would be one of the following forms.
;;
;; (("character-regexp" . "glyphs")
;; .....) or
;; (("character-regexp" . ?glyph)
;; .....) or
;; ("characters-regexp" . "glyphs")
;; or
;; ?glyph
;;
;; * If glyph-to-char is non-nil, it would be one of the following forms.
;;
;; (("glyph-regexp" . "characters") ;; This is the only case in Devanagari
;; ....) or
;; (("glyph-regexp" . ?character)
;; ....) or
;; ("glyph-regexp" . "characters")
;; or
;; "characters"
;; or
;; ?character
;;
(let ((rules devanagari-char-to-glyph-rules))
(while rules
(let ((rule (car rules))
(chars) (char) (glyph))
(setq rules (cdr rules))
(string-match "\\\\(\\(.+\\)\\\\)" (car rule))
(setq chars (substring (car rule) (match-beginning 1) (match-end 1)))
(setq char (string-to-char chars))
(setq glyph (string-to-char (cdr rule))) ; assume one glyph in devan.
(put-char-code-property
char 'char-to-glyph
(append (get-char-code-property char 'char-to-glyph) (list rule)))
(put-char-code-property glyph 'glyph-to-char chars))))
;;
;; Convert Character Code to Glyph Code
;;
;;;###autoload
(defun char-to-glyph-devanagari (src-str)
"Convert Devanagari characters in the string to Devanagari glyphs.
Ligatures and special rules are processed."
(let ((pos 0)
(dst-str ""))
(while (< pos (length src-str))
(let ((found nil)
(rules (get-char-code-property
(string-to-char
;; caution. other forms not supported for now.
(substring src-str pos)) 'char-to-glyph)))
(while rules
(let* ((rule (car rules))
(regexp (car rule)))
(if (string-match regexp src-str)
(if (= (match-beginning 1) pos)
(progn
(setq dst-str (concat dst-str (cdr rule)))
(setq rules nil) ; Get out of the loop.
(setq found t)
;; proceed `pos' for replaced characters.
(setq pos (match-end 1)))
(setq rules (cdr rules)))
(setq rules (cdr rules)))))
;; proceed to next position
(if (not found)
(let ((nextchar (string-to-char (substring src-str pos))))
(setq pos (+ pos
(char-bytes (string-to-char (substring src-str pos)))))
(setq dst-str (concat dst-str (char-to-string nextchar)))))))
dst-str))
;; Example:
;;(char-to-glyph-devanagari "$(5!X![!F!h!D!\(B") => "$(5!X!["F!D!\(B"
;;(char-to-glyph-devanagari "$(5!O!Z!V!h!=!h!O![!M(B") => ???
;;
;; Phase 2: Compose Glyphs to form One Glyph.
;;
;; Each list consist of glyph, application-priority and application-direction.
;;
;; Glyphs will be ordered from low priority number to high priority number.
;; If application-priority is omitted, it is assumed to be 0.
;; If application-direction is omitted, it is asumbed to be '(mr . ml).
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
;;
;; Priority
;; Base Glyphs = {$(5!h!i(B} = Misc >
;; {$(5"p"q"r(B} > Matras > {$(5!!!"!#(B}
;; Question Halant and '$(5"q"r(B' priority problem.
Initial revision
1997-02-20 07:02:49 +00:00
(defconst devanagari-composition-rules
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
'((?$(5!!(B 70 (tr . br))
(?$(5!"(B 70 (mr . mr))
(?$(5!#(B 70)
Initial revision
1997-02-20 07:02:49 +00:00
(?$(5!$(B 0)
(?$(5!%(B 0)
(?$(5!&(B 0)
(?$(5!'(B 0)
(?$(5!((B 0)
(?$(5!)(B 0)
(?$(5!*(B 0)
(?$(5!+(B 0)
(?$(5!,(B 0)
(?$(5!-(B 0)
(?$(5!.(B 0)
(?$(5!/(B 0)
(?$(5!0(B 0)
(?$(5!1(B 0)
(?$(5!2(B 0)
(?$(5!3(B 0)
(?$(5!4(B 0)
(?$(5!5(B 0)
(?$(5!6(B 0)
(?$(5!7(B 0)
(?$(5!8(B 0)
(?$(5!9(B 0)
(?$(5!:(B 0)
(?$(5!;(B 0)
(?$(5!<(B 0)
(?$(5!=(B 0)
(?$(5!>(B 0)
(?$(5!?(B 0)
(?$(5!@(B 0)
(?$(5!A(B 0)
(?$(5!B(B 0)
(?$(5!C(B 0)
(?$(5!D(B 0)
(?$(5!E(B 0)
(?$(5!F(B 0)
(?$(5!G(B 0)
(?$(5!H(B 0)
(?$(5!I(B 0)
(?$(5!J(B 0)
(?$(5!K(B 0)
(?$(5!L(B 0)
(?$(5!M(B 0)
(?$(5!N(B 0)
(?$(5!O(B 0)
(?$(5!P(B 0)
(?$(5!Q(B 0)
(?$(5!R(B 0)
(?$(5!S(B 0)
(?$(5!T(B 0)
(?$(5!U(B 0)
(?$(5!V(B 0)
(?$(5!W(B 0)
(?$(5!X(B 0)
(?$(5!Y(B 0)
(?$(5!Z(B 40)
(?$(5![(B 40 (ml . mr))
(?$(5!\(B 40)
(?$(5!](B 40 (bc . tc))
(?$(5!^(B 40 (bc . tc))
(?$(5!_(B 40 (bc . tc))
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
(?$(5!`(B 40 (mr . mr)) ; (tc . bc)
(?$(5!a(B 40 (mr . mr))
(?$(5!b(B 40 (mr . mr))
(?$(5!c(B 40 (mr . mr))
Initial revision
1997-02-20 07:02:49 +00:00
(?$(5!d(B 40)
(?$(5!e(B 40)
(?$(5!f(B 40)
(?$(5!g(B 40)
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
(?$(5!h(B 0 (br . tr))
(?$(5!i(B 0 (br . tr))
Initial revision
1997-02-20 07:02:49 +00:00
(?$(5!j(B 0)
(nil 0)
(nil 0)
(nil 0)
(nil 0)
(nil 0)
(nil 0)
(?$(5!q(B 0)
(?$(5!r(B 0)
(?$(5!s(B 0)
(?$(5!t(B 0)
(?$(5!u(B 0)
(?$(5!v(B 0)
(?$(5!w(B 0)
(?$(5!x(B 0)
(?$(5!y(B 0)
(?$(5!z(B 0)
(nil 0)
(nil 0)
(nil 0)
(nil 0)
(?$(5"!(B 0)
(?$(5""(B 0)
(?$(5"#(B 0)
(?$(5"$(B 0)
(?$(5"%(B 0)
(?$(5"&(B 0)
(?$(5"'(B 0)
(?$(5"((B 0)
(?$(5")(B 0)
(?$(5"*(B 0)
(?$(5"+(B 0)
(?$(5",(B 0)
(?$(5"-(B 0)
(?$(5".(B 0)
(?$(5"/(B 0)
(?$(5"0(B 0)
(?$(5"1(B 0)
(?$(5"2(B 0)
(?$(5"3(B 0)
(?$(5"4(B 0)
(?$(5"5(B 0)
(?$(5"6(B 0)
(?$(5"7(B 0)
(?$(5"8(B 0)
(?$(5"9(B 0)
(?$(5":(B 0)
(?$(5";(B 0)
(?$(5"<(B 0)
(?$(5"=(B 0)
(?$(5">(B 0)
(?$(5"?(B 0)
(?$(5"@(B 0)
(?$(5"A(B 0)
(?$(5"B(B 0)
(?$(5"C(B 0)
(?$(5"D(B 0)
(?$(5"E(B 0)
(?$(5"F(B 0)
(?$(5"G(B 0)
(?$(5"H(B 0)
(?$(5"I(B 0)
(?$(5"J(B 0)
(?$(5"K(B 0)
(?$(5"L(B 0)
(?$(5"M(B 0)
(?$(5"N(B 0)
(?$(5"O(B 0)
(?$(5"P(B 0)
(?$(5"Q(B 0)
(?$(5"R(B 0)
(?$(5"S(B 0)
(?$(5"T(B 0)
(?$(5"U(B 0)
(?$(5"V(B 0)
(?$(5"W(B 0)
(?$(5"X(B 0)
(?$(5"Y(B 0)
(?$(5"Z(B 0)
(?$(5"[(B 0)
(?$(5"\(B 0)
(?$(5"](B 0)
(?$(5"^(B 0)
(?$(5"_(B 0)
(?$(5"`(B 0)
(?$(5"a(B 0)
(?$(5"b(B 0)
(?$(5"c(B 0)
(?$(5"d(B 0)
(?$(5"e(B 0)
(?$(5"f(B 0)
(?$(5"g(B 0)
(?$(5"h(B 0)
(?$(5"i(B 0)
(?$(5"j(B 0)
(?$(5"k(B 0)
(?$(5"l(B 0)
(?$(5"m(B 0)
(?$(5"n(B 0)
(?$(5"o(B 0)
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
(?$(5"p(B 30 (mr . mr))
(?$(5"q(B 30 (br . tr))
(?$(5"r(B 30 (br . tr))
Initial revision
1997-02-20 07:02:49 +00:00
(?$(5"s(B 0)
(?$(5"t(B 0)
(?$(5"u(B 0)
(?$(5"v(B 0)
(?$(5"w(B 0)
(?$(5"x(B 0)
(?$(5"y(B 0)
(?$(5"z(B 0)
(?$(5"{(B 0)
(?$(5"|(B 0)
(?$(5"}(B 0)
(?$(5"~(B 0)
(?$(5#!(B 0)
(?$(5#"(B 0)
(?$(5##(B 0)
(?$(5#$(B 0)
(?$(5#%(B 0)
(?$(5#&(B 0)
(?$(5#'(B 0)
(?$(5#((B 0)
(?$(5#)(B 0)
(?$(5#*(B 0)
(?$(5#+(B 0)
(?$(5#,(B 0)
(?$(5#-(B 0)
(?$(5#.(B 0)
(?$(5#/(B 0)
(?$(5#0(B 0)
(?$(5#1(B 0)
(?$(5#2(B 0)
(?$(5#3(B 0)
(?$(5#4(B 0)
(?$(5#5(B 0)
(?$(5#6(B 0)
(?$(5#7(B 0)
(?$(5#8(B 0)
(?$(5#9(B 0)
(?$(5#:(B 0)
(?$(5#;(B 0)
(?$(5#<(B 0)
(?$(5#=(B 0)
(?$(5#>(B 0)
(?$(5#?(B 0)
(?$(5#@(B 0)
(?$(5#A(B 0)
(?$(5#B(B 0)
(?$(5#C(B 0)
(?$(5#D(B 0)
(?$(5#E(B 0)
(?$(5#F(B 0)
(?$(5#G(B 0)
(?$(5#H(B 0)
(?$(5#I(B 0)
(?$(5#J(B 0)
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
(?$(5#K(B 40 (bc . tc))
(?$(5#L(B 40 (bc . tc))
(?$(5#M(B 40 (bc . tc))
Initial revision
1997-02-20 07:02:49 +00:00
(?$(5#N(B 0)
(?$(5#O(B 0)
(?$(5#P(B 0)
(?$(5#Q(B 0)
(?$(5#R(B 0)
(?$(5#S(B 0)
(?$(5#T(B 0)
(?$(5#U(B 0)
(?$(5#V(B 0)
(?$(5#W(B 0)
(?$(5#X(B 0)
(?$(5#Y(B 0)
(?$(5#Z(B 0)
(?$(5#[(B 0)
(?$(5#\(B 0)
(?$(5#](B 0)
(?$(5#^(B 0)
(?$(5#_(B 0)
(?$(5#`(B 0)
(?$(5#a(B 0)
(?$(5#b(B 0)
(?$(5#c(B 0)
(?$(5#d(B 0)
(?$(5#e(B 0)
(?$(5#f(B 0)
(?$(5#g(B 0)
(?$(5#h(B 0)
(?$(5#i(B 0)
(?$(5#j(B 0)
(?$(5#k(B 0)
(?$(5#l(B 0)
(?$(5#m(B 0)
(?$(5#n(B 0)
(?$(5#o(B 0)
(?$(5#p(B 0)
(?$(5#q(B 0)
(?$(5#r(B 0)
(?$(5#s(B 0)
(?$(5#t(B 0)
(?$(5#u(B 0)
(?$(5#v(B 0)
(?$(5#w(B 0)
(?$(5#x(B 0)
(?$(5#y(B 0)
(?$(5#z(B 0)
(?$(5#{(B 0)
(?$(5#|(B 0)
(?$(5#}(B 0)
(?$(5#~(B 0)
(?$(5$!(B 0)
(?$(5$"(B 0)
(?$(5$#(B 0)
(?$(5$$(B 0)
(?$(5$%(B 0)
(?$(5$&(B 0)
(?$(5$'(B 0)
(?$(5$((B 0)
(?$(5$)(B 0)
(?$(5$*(B 0)
(?$(5$+(B 0)
(?$(5$,(B 0)
(?$(5$-(B 0)
(?$(5$.(B 0)
(?$(5$/(B 0)
(?$(5$0(B 0)
(?$(5$1(B 0)
(?$(5$2(B 0)
(?$(5$3(B 0)
(?$(5$4(B 0)
(?$(5$5(B 0)
(?$(5$6(B 0)
(?$(5$7(B 0)
(?$(5$8(B 0)
(?$(5$9(B 0)
(?$(5$:(B 0)
(?$(5$;(B 0)
(?$(5$<(B 0)
(?$(5$=(B 0)
(?$(5$>(B 0)
(?$(5$?(B 0)
(?$(5$@(B 0)
(?$(5$A(B 0)
(?$(5$B(B 0)
(?$(5$C(B 0)
(?$(5$D(B 0)
(?$(5$E(B 0)
(?$(5$F(B 0)
(?$(5$G(B 0)
(?$(5$H(B 0)
(?$(5$I(B 0)
(?$(5$J(B 0)
(?$(5$K(B 0)
(?$(5$L(B 0)
(?$(5$M(B 0)
(?$(5$N(B 0)
(?$(5$O(B 0)
(?$(5$P(B 0)
(?$(5$Q(B 0)
(?$(5$R(B 0)
(?$(5$S(B 0)
(?$(5$T(B 0)
(?$(5$U(B 0)
(?$(5$V(B 0)
(?$(5$W(B 0)
(?$(5$X(B 0)
(?$(5$Y(B 0)
(?$(5$Z(B 0)
(?$(5$[(B 0)
(?$(5$\(B 0)
(?$(5$](B 0)
(?$(5$^(B 0)
(?$(5$_(B 0)
(?$(5$`(B 0)
(?$(5$a(B 0)
(?$(5$b(B 0)
(?$(5$c(B 0)
(?$(5$d(B 0)
(?$(5$e(B 0)
(?$(5$f(B 0)
(?$(5$g(B 0)
(?$(5$h(B 0)
(?$(5$i(B 0)
(?$(5$j(B 0)
(?$(5$k(B 0)
(?$(5$l(B 0)
(?$(5$m(B 0)
(?$(5$n(B 0)
(?$(5$o(B 0)
(?$(5$p(B 0)
(?$(5$q(B 0)
(?$(5$r(B 0)
(?$(5$s(B 0)
(?$(5$t(B 0)
(?$(5$u(B 0)
(?$(5$v(B 0)
(?$(5$w(B 0)
(?$(5$x(B 0)
(?$(5$y(B 0)
(?$(5$z(B 0)
(?$(5${(B 0)
(?$(5$|(B 0)
(?$(5$}(B 0)
(?$(5$~(B 0)
))
;; Determine composition priority and rule of the array of Glyphs.
;; Sort the glyphs with their priority.
(defun devanagari-reorder-glyph-for-composition (glyph-alist)
(let* ((pos 0)
(ordered-glyphs '()))
(while (< pos (length glyph-alist))
(let* ((glyph (aref glyph-alist pos)))
(setq pos (1+ pos))
(setq ordered-glyphs
(append ordered-glyphs (list (assq glyph devanagari-composition-rules))))))
(sort ordered-glyphs '(lambda (x y) (< (car (cdr x)) (car (cdr y)))))))
;;(devanagari-compose-to-one-glyph "$(5"5!X![(B") => "2$(6!XP"5@![1(B"
(defun devanagari-compose-to-one-glyph (devanagari-string)
(let* ((o-glyph-list (devanagari-reorder-glyph-for-composition
(string-to-vector devanagari-string)))
;; List of glyphs to be composed.
(cmp-glyph-list (list (car (car o-glyph-list))))
(o-glyph-list (cdr o-glyph-list)))
(while o-glyph-list
(let* ((o-glyph (car o-glyph-list))
(glyph (if (< 2 (length o-glyph))
;; default composition
(list (car (cdr (cdr o-glyph))) (car o-glyph))
;; composition with a specified rule
(list '(mr . ml) (car o-glyph)))))
(setq o-glyph-list (cdr o-glyph-list))
(setq cmp-glyph-list (append cmp-glyph-list glyph))))
;; Before applying compose-chars, convert glyphs to
;; 1-column width if possible.
(setq cmp-glyph-list (devanagari-wide-to-narrow cmp-glyph-list))
(if (= (length cmp-glyph-list) 1) (char-to-string (car cmp-glyph-list))
(apply 'compose-chars cmp-glyph-list))))
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
;; Utility function for Phase 2.5
;; Check whether given glyph is a Devanagari vertical modifier or not.
;; If it is a vertical modifier, whether it should be 1-column shape or not
;; depends on previous non-vertical modifier.
; return nil if it is not vertical modifier.
(defun devanagari-vertical-modifier-p (glyph)
(string-match (char-to-string glyph)
"[$(5!]!^!_!`!a!b!c!h!i"p"q"r#K#L#M(B]"))
(defun devanagari-non-vertical-modifier-p (glyph)
(string-match (char-to-string glyph)
"[$(5!Z![!\!d!e!f!g(B]"))
Initial revision
1997-02-20 07:02:49 +00:00
;;
;; Phase 2.5 Convert Appropriate Character to 1-column shape.
;;
;; This is temporary and should be removed out when Emacs supports
;; variable width characters.
;;
;; This will convert the composing glyphs (2 column glyphs)
;; to narrow (1 column) glyphs if they exist.
;;
;; devanagari-wide-to-narrow-old converts glyphs simply.
;; devanagari-wide-to-narrow takes care of upper/lower apply-glyphs
;; with 2 column base-glyph.
;;
;; Execution Examples
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
;;(devanagari-wide-to-narrow '(?$(5!3(B (ml . ml) ?$(5!a(B))
;;(devanagari-wide-to-narrow '(?$(5!F(B (ml . ml) ?$(5!a(B))
;(defun devanagari-wide-to-narrow (src-list)
; (if (null src-list) '()
; (cons
; (if (and (numberp (car src-list))
; (cdr (assq (car src-list) devanagari-1-column-char)))
; (cdr (assq (car src-list) devanagari-1-column-char))
; (car src-list))
; (devanagari-wide-to-narrow (cdr src-list)))))
Initial revision
1997-02-20 07:02:49 +00:00
(defun devanagari-wide-to-narrow (src-list)
Fix handling of several characters.
1997-02-26 12:39:10 +00:00
(devanagari-wide-to-narrow-iter src-list t))
(defun devanagari-wide-to-narrow-iter (src-list wide-p)
(let ((glyph (car src-list)))
(cond ((null src-list) '())
; not glyph code
((not (numberp glyph))
(cons glyph (devanagari-wide-to-narrow-iter (cdr src-list) wide-p)))
; vertical modifier glyph
((devanagari-vertical-modifier-p glyph)
(if (and (null wide-p)
(cdr (assq glyph devanagari-1-column-char)))
(cons (cdr (assq glyph devanagari-1-column-char))
(devanagari-wide-to-narrow-iter (cdr src-list) nil))
(cons glyph
(devanagari-wide-to-narrow-iter (cdr src-list) t))))
; nonvertical modifier glyph
((devanagari-non-vertical-modifier-p glyph)
(if (cdr (assq glyph devanagari-1-column-char))
(cons (cdr (assq glyph devanagari-1-column-char))
(devanagari-wide-to-narrow-iter (cdr src-list) wide-p))
(cons glyph
(devanagari-wide-to-narrow-iter (cdr src-list) wide-p))))
; normal glyph
(t
(if (cdr (assq glyph devanagari-1-column-char))
(cons (cdr (assq glyph devanagari-1-column-char))
(devanagari-wide-to-narrow-iter (cdr src-list) nil))
(cons glyph
(devanagari-wide-to-narrow-iter (cdr src-list) t)))))))
Initial revision
1997-02-20 07:02:49 +00:00
;;
;; Summary
;;
;;;###autoload
(defun devanagari-compose-string (str)
(let ((len (length str))
(src str) (dst "") rest match-b match-e)
(while (string-match devanagari-composite-glyph-unit-examine src)
(setq match-b (match-beginning 0) match-e (match-end 0))
(setq dst
(concat dst
(substring src 0 match-b)
(devanagari-compose-to-one-glyph
(char-to-glyph-devanagari
(substring src match-b match-e)))))
(setq src (substring src match-e)))
(setq dst (concat dst src))
dst))
;;;###autoload
(defun devanagari-compose-region (from to)
(interactive "r")
(save-restriction
(narrow-to-region from to)
(goto-char (point-min))
(while (re-search-forward devanagari-composite-glyph-unit-examine nil t)
(let* ((match-b (match-beginning 0)) (match-e (match-end 0))
(cmps (devanagari-compose-to-one-glyph
(char-to-glyph-devanagari
(buffer-substring match-b match-e)))))
(delete-region match-b match-e)
(insert cmps)))))
;;
;; Decomposition of composite font.
;;
(defun devanagari-normalize-narrow-glyph (charlist)
(let ((wide-char (car (rassoc (car charlist) devanagari-1-column-char))))
(if (null charlist) nil
(cons (if (null wide-char) (car charlist) wide-char)
(devanagari-normalize-narrow-glyph (cdr charlist))))))
(defvar devanagari-decomposition-rules
'(
(?$(5"p(B -20)
)
)
(defun devanagari-reorder-glyph-for-decomposition (glyphlist)
"This function re-orders glyph list."
(sort glyphlist
'(lambda (x y)
(let ((xx (assoc x devanagari-decomposition-rules))
(yy (assoc y devanagari-decomposition-rules)))
(if (null xx) (setq xx 0))
(if (null yy) (setq yy 0))
(< xx yy)))))
(defun devanagari-decompose-char (char)
"This function decomposes one Devanagari composite character to
basic Devanagari character."
(let ((glyphlist (decompose-composite-char char)))
(if (not (listp glyphlist))
(setq glyphlist (list glyphlist)))
(setq glyphlist (devanagari-normalize-narrow-glyph glyphlist))
(mapconcat '(lambda (x) (let ((char (get-char-code-property
x 'glyph-to-char)))
(if (null char) (char-to-string x) char)))
(devanagari-reorder-glyph-for-decomposition glyphlist)
"")))
;;;###autoload
(defun devanagari-decompose-string (str)
"This function Decomposes Devanagari glyph string to
basic Devanagari character string."
(let ((src str) (dst ""))
(while (not (equal src ""))
(let* ((char (string-to-char src))
(clen (char-bytes char)))
(setq src (substring src clen))
(setq dst (concat dst
(devanagari-decompose-char char)))))
dst))
;;;###autoload
(defun devanagari-decompose-region (from to)
(interactive "r")
(save-restriction
(narrow-to-region from to)
(goto-char (point-min))
(while (re-search-forward "." nil t)
(let* ((match-b (match-beginning 0)) (match-e (match-end 0))
(decmps (devanagari-decompose-string (buffer-substring match-b match-e))))
(delete-char -1)
(insert decmps)))))
;; For pre-write and post-read conversion
;;;###autoload
(defun devanagari-compose-from-is13194-region (from to)
"Compose IS 13194 characters in the region to Devanagari characters."
(interactive "r")
(save-restriction
(narrow-to-region from to)
(indian-to-devanagari-region (point-min) (point-max))
(devanagari-compose-region (point-min) (point-max))))
;;;###autoload
(defun devanagari-decompose-to-is13194-region (from to)
"Decompose Devanagari characters in the region to IS 13194 characters."
(interactive "r")
(save-restriction
(narrow-to-region from to)
(devanagari-decompose-region (point-min) (point-max))
(devanagari-to-indian-region (point-min) (point-max))))
;;
(provide 'language/devan-util)
;;; Local Variables:
;;; generated-autoload-file: "../loaddefs.el"
;;; End:
;;; devan-util.el ends here
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