3d61657694
* lisp/language/misc-lang.el (arabic-shaper-ZWNJ-handling): Adjusted the doctstring for addition of :set (bug#28312).
146 lines
5 KiB
EmacsLisp
146 lines
5 KiB
EmacsLisp
;;; misc-lang.el --- support for miscellaneous languages (characters)
|
|
|
|
;; 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 <https://www.gnu.org/licenses/>.
|
|
|
|
;;; 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)
|
|
(setq gstring (font-shape-gstring gstring))
|
|
(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)
|
|
(vector "[\u200C\u200D][\u0600-\u074F\u200C\u200D]+" 1
|
|
'arabic-shape-gstring)))
|
|
|
|
(provide 'misc-lang)
|
|
|
|
;;; misc-lang.el ends here
|