;;; misc-lang.el --- support for miscellaneous languages (characters) -*- lexical-binding: t; -*- ;; Copyright (C) 2012-2022 Free Software Foundation, Inc. ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, ;; 2005, 2006, 2007, 2008, 2009, 2010, 2011 ;; National Institute of Advanced Industrial Science and Technology (AIST) ;; Registration Number H14PRO021 ;; Keywords: multilingual, character set, coding system ;; 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 of the License, 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. If not, see . ;;; Commentary: ;;; Code: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;; IPA (International Phonetic Alphabet) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (set-language-info-alist "IPA" '((charset . (ipa)) (coding-priority utf-8) (coding-system utf-8) (input-method . "ipa") (nonascii-translation . ipa) (documentation . "\ IPA is International Phonetic Alphabet for English, French, German and Italian."))) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; Arabic ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (define-coding-system 'iso-8859-6 "ISO-8859-6 based encoding (MIME:ISO-8859-6)." :coding-type 'charset :mnemonic ?6 :charset-list '(iso-8859-6) :mime-charset 'iso-8859-6) (define-coding-system 'windows-1256 "windows-1256 (Arabic) encoding (MIME: WINDOWS-1256)" :coding-type 'charset :mnemonic ?A :charset-list '(windows-1256) :mime-charset 'windows-1256) (define-coding-system-alias 'cp1256 'windows-1256) (set-language-info-alist "Arabic" '((charset unicode) (coding-system utf-8 iso-8859-6 windows-1256) (coding-priority utf-8 iso-8859-6 windows-1256) (input-method . "arabic") (sample-text . "Arabic السّلام عليكم") (documentation . "Bidirectional editing is supported."))) (set-language-info-alist "Persian" '((charset unicode) (coding-system utf-8 iso-8859-6 windows-1256) (coding-priority utf-8 iso-8859-6 windows-1256) (input-method . "farsi-transliterate-banan") (sample-text . "Persian فارسی") (documentation . "Bidirectional editing is supported."))) (defcustom arabic-shaper-ZWNJ-handling nil "How to handle ZWMJ in Arabic text rendering. This variable controls the way to handle a glyph for ZWNJ returned by the underling shaping engine. The default value is nil, which means that the ZWNJ glyph is displayed as is. If the value is `absorb', ZWNJ is absorbed into the previous grapheme cluster, and not displayed. If the value is `as-space', the glyph is displayed by a thin (i.e. 1-dot width) space." :group 'mule :version "26.1" :type '(choice (const :tag "default" nil) (const :tag "as space" as-space) (const :tag "absorb" absorb)) :set (lambda (sym val) (set-default sym val) (clear-composition-cache))) ;; Record error in arabic-change-gstring. (defvar arabic-shape-log nil) (defun arabic-shape-gstring (gstring direction) (setq gstring (font-shape-gstring gstring direction)) (condition-case err (when arabic-shaper-ZWNJ-handling (let ((font (lgstring-font gstring)) (i 1) (len (lgstring-glyph-len gstring)) (modified nil)) (while (< i len) (let ((glyph (lgstring-glyph gstring i))) (when (eq (lglyph-char glyph) #x200c) (cond ((eq arabic-shaper-ZWNJ-handling 'as-space) (if (> (- (lglyph-rbearing glyph) (lglyph-lbearing glyph)) 0) (let ((space-glyph (aref (font-get-glyphs font 0 1 " ") 0))) (when space-glyph (lglyph-set-code glyph (aref space-glyph 3)) (lglyph-set-width glyph (aref space-glyph 4))))) (lglyph-set-adjustment glyph 0 0 1) (setq modified t)) ((eq arabic-shaper-ZWNJ-handling 'absorb) (let ((prev (lgstring-glyph gstring (1- i)))) (lglyph-set-from-to prev (lglyph-from prev) (lglyph-to glyph)) (setq gstring (lgstring-remove-glyph gstring i)) (setq len (1- len))) (setq modified t))))) (setq i (1+ i))) (if modified (lgstring-set-id gstring nil)))) (error (push err arabic-shape-log))) gstring) (set-char-table-range composition-function-table '(#x600 . #x74F) (list (vector "[\u0600-\u074F\u200C\u200D]+" 0 #'arabic-shape-gstring))) (set-char-table-range composition-function-table '(#x200C . #x200D) (list (vector "[\u200C\u200D][\u0600-\u074F\u200C\u200D]+" 0 #'arabic-shape-gstring))) ;; The Egyptian Hieroglyph Format Controls were introduced in Unicode ;; Standard v12.0. Apparently, they are not yet well supported in ;; existing fonts, as of late 2020. But there's no reason for us not ;; to be ready for when they will be! ;; The below is needed to support the arrangement of the Egyptian ;; Hieroglyphs in "quadrats", as directed by the format controls, ;; which specify how the hieroglyphs should be joined horizontally and ;; vertically. (defun egyptian-shape-grouping (gstring direction) (if (= (lgstring-char gstring 0) #x13437) (let ((nchars (lgstring-char-len gstring)) (i 1) (nesting 1) ch) ;; Find where this group ends. (while (and (< i nchars) (> nesting 0)) (setq ch (lgstring-char gstring i)) (cond ((= ch #x13437) (setq nesting (1+ nesting))) ((= ch #x13438) (setq nesting (1- nesting)))) (setq i (1+ i))) (when (zerop nesting) ;; Make a new gstring from the characters that constitute a ;; complete nested group. (let ((new-header (make-vector (1+ i) nil)) (new-gstring (make-vector (+ i 2) nil))) (aset new-header 0 (lgstring-font gstring)) (dotimes (j i) (aset new-header (1+ j) (lgstring-char gstring j)) (lgstring-set-glyph new-gstring j (lgstring-glyph gstring j))) (lgstring-set-header new-gstring new-header) (font-shape-gstring new-gstring direction)))))) (let ((hieroglyph "[\U00013000-\U0001342F]")) ;; HORIZONTAL/VERTICAL JOINER and INSERT AT.../OVERLAY controls (set-char-table-range composition-function-table '(#x13430 . #x13436) (list (vector (concat hieroglyph "[\U00013430-\U00013436]" hieroglyph) ;; We use font-shape-gstring so that, if the font ;; doesn't support these controls, the glyphs are ;; displayed individually, and not as a single ;; grapheme cluster. 1 #'font-shape-gstring))) ;; Grouping controls (set-char-table-range composition-function-table #x13437 (list (vector "\U00013437[\U00013000-\U0001343F]+" 0 #'egyptian-shape-grouping))) ;; "Normal" hieroglyphs, for fonts that don't support the above ;; controls, but do shape sequences of hieroglyphs without the ;; controls. ;; FIXME: As of late 2021, Egyptian Hieroglyph Format Controls are ;; not yet supported in existing fonts and/or shaping engines, but ;; some fonts do provide ligatures with which texts in Egyptian ;; Hieroglyphs are correctly displayed. If and when these format ;; controls are supported, as described in section 11.4 "Egyptian ;; Hieroglyphs" of the Unicode Standard, the five lines below (which ;; allow composition of hieroglyphs without formatting controls ;; around) can be removed, and the entry in etc/HELLO can be ;; restored to: ;; Egyptian Hieroglyphs (𓂋𓐰𓏤𓈖𓆎𓅓𓏏𓐰𓊖) 𓅓𓊵𓐰𓐷𓏏𓊪𓐸, 𓇍𓇋𓂻𓍘𓇋 (set-char-table-range composition-function-table '(#x13000 . #x1342E) (list (vector "[\U00013000-\U0001342E]+" 0 #'font-shape-gstring)))) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; Hanifi Rohingya ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (set-language-info-alist "Hanifi Rohingya" '((charset unicode) (coding-system utf-8) (coding-priority utf-8) (input-method . "hanifi-rohingya") (sample-text . "Hanifi Rohingya (𐴌𐴟𐴇𐴥𐴝𐴚𐴒𐴙𐴝 𐴇𐴝𐴕𐴞𐴉𐴞 𐴓𐴠𐴑𐴤𐴝) 𐴀𐴝𐴏𐴓𐴝𐴀𐴡𐴤𐴛𐴝𐴓𐴝𐴙𐴑𐴟𐴔") (documentation . "\ Rohingya language and its script Hanifi Rohingya are supported in this language environment."))) ;; Hanifi Rohingya composition rules (set-char-table-range composition-function-table '(#x10D1D . #x10D27) (list (vector "[\x10D00-\x10D27]+" 1 'font-shape-gstring))) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; Kharoṣṭhī ;; Author: Stefan Baums ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (set-language-info-alist "Kharoshthi" '((charset unicode) (coding-system utf-8) (coding-priority utf-8) (input-method . "kharoshthi") (sample-text . "Kharoṣṭhī (𐨑𐨪𐨆𐨛𐨁) 𐨣𐨨𐨲𐨪𐨆 𐨐𐨪𐨅𐨨𐨁") (documentation . "\ Language environment for Gāndhārī, Sanskrit, and other languages using the Kharoṣṭhī script."))) (let ((consonant "[\U00010A00\U00010A10-\U00010A35]") (vowel "[\U00010A01-\U00010A06]") (virama "\U00010A3F") (modifier "[\U00010A0C-\U00010A0F\U00010A38-\U00010A3A]")) (set-char-table-range composition-function-table '(#x10A3F . #x10A3F) (list (vector (concat consonant "\\(?:" virama consonant "\\)*" modifier "*" virama "?" vowel "*" modifier "*") 1 'font-shape-gstring)))) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; Adlam ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (set-language-info-alist "Adlam" '((charset unicode) (coding-system utf-8) (coding-priority utf-8) (input-method . "adlam") (sample-text . "Adlam (𞤀𞤣𞤤𞤢𞤥) 𞤅𞤢𞤤𞤢𞥄𞤥") (documentation . "\ Fulani language and its script Adlam are supported in this language environment."))) ;; Adlam composition rules (set-char-table-range composition-function-table '(#x1E900 . #x1E95F) (list (vector "[\x1E900-\x1E95F]+" 0 'font-shape-gstring))) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; Mende Kikakui ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (set-language-info-alist "Mende Kikakui" '((charset unicode) (coding-system utf-8) (coding-priority utf-8) (input-method . "mende-kikakui") (sample-text . "Mende Kikakui (𞠀𞠁𞠂) 𞠛𞠉") (documentation . "\ Mende language and its script Kikakui are supported in this language environment."))) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; Gothic ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (set-language-info-alist "Gothic" '((charset unicode) (coding-system utf-8) (coding-priority utf-8) (input-method . "gothic") (sample-text . "Gothic (𐌲𐌿𐍄𐌹𐍃𐌺𐌰) 𐌷𐌰𐌹𐌻𐍃 / 𐌷𐌰𐌹𐌻𐌰") (documentation . "\ Gothic language using the Gothic script is supported in this language environment."))) (provide 'misc-lang) ;;; misc-lang.el ends here