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123 lines
4.3 KiB
EmacsLisp
123 lines
4.3 KiB
EmacsLisp
;;; hebrew.el --- support for Hebrew -*- coding: iso-2022-7bit; no-byte-compile: t -*-
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;; Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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;; Free Software Foundation, Inc.
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;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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;; 2005, 2006, 2007, 2008, 2009, 2010
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;; National Institute of Advanced Industrial Science and Technology (AIST)
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;; Registration Number H14PRO021
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;; Copyright (C) 2003
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;; National Institute of Advanced Industrial Science and Technology (AIST)
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;; Registration Number H13PRO009
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;; Keywords: multilingual, Hebrew
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; For Hebrew, the character set ISO8859-8 is supported.
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;; See http://www.ecma.ch/ecma1/STAND/ECMA-121.HTM.
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;; Windows-1255 is also supported.
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;;; Code:
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(define-coding-system 'hebrew-iso-8bit
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"ISO 2022 based 8-bit encoding for Hebrew (MIME:ISO-8859-8)."
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:coding-type 'charset
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:mnemonic ?8
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:charset-list '(iso-8859-8)
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:mime-charset 'iso-8859-8)
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(define-coding-system-alias 'iso-8859-8 'hebrew-iso-8bit)
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;; These are for Explicit and Implicit directionality information, as
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;; defined in RFC 1556. We don't yet support directional information
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;; in bidi languages, so these aliases are a lie, especially as far as
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;; iso-8859-8-e is concerned. FIXME.
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(define-coding-system-alias 'iso-8859-8-e 'hebrew-iso-8bit)
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(define-coding-system-alias 'iso-8859-8-i 'hebrew-iso-8bit)
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(set-language-info-alist
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"Hebrew" '((charset iso-8859-8)
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(coding-priority hebrew-iso-8bit)
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(coding-system hebrew-iso-8bit windows-1255 cp862)
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(nonascii-translation . iso-8859-8)
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(input-method . "hebrew")
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(unibyte-display . hebrew-iso-8bit)
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(sample-text . "Hebrew ,Hylem(B")
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(documentation . "Bidirectional editing is supported.")))
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(set-language-info-alist
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"Windows-1255" '((coding-priority windows-1255)
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(coding-system windows-1255)
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(documentation . "\
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Support for Windows-1255 encoding, e.g. for Yiddish.
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Bidirectional editing is supported.")))
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(define-coding-system 'windows-1255
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"windows-1255 (Hebrew) encoding (MIME: WINDOWS-1255)"
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:coding-type 'charset
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:mnemonic ?h
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:charset-list '(windows-1255)
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:mime-charset 'windows-1255)
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(define-coding-system-alias 'cp1255 'windows-1255)
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(define-coding-system 'cp862
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"DOS codepage 862 (Hebrew)"
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:coding-type 'charset
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:mnemonic ?D
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:charset-list '(cp862)
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:mime-charset 'cp862)
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(define-coding-system-alias 'ibm862 'cp862)
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;; Composition function for hebrew.
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(defun hebrew-shape-gstring (gstring)
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(setq gstring (font-shape-gstring gstring))
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(let ((header (lgstring-header gstring))
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(nchars (lgstring-char-len gstring))
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(nglyphs (lgstring-glyph-len gstring))
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(base-width (lglyph-width (lgstring-glyph gstring 0))))
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(while (and (> nglyphs 1)
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(not (lgstring-glyph gstring (1- nglyphs))))
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(setq nglyphs (1- nglyphs)))
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(while (> nglyphs 1)
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(setq nglyphs (1- nglyphs))
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(let* ((glyph (lgstring-glyph gstring nglyphs))
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(adjust (and glyph (lglyph-adjustment glyph))))
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(if adjust
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(setq nglyphs 0)
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(if (>= (lglyph-lbearing glyph) 0)
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(lglyph-set-adjustment glyph (- base-width) 0 0))))))
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gstring)
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(let ((pattern1 "[\u05D0-\u05F2][\u0591-\u05BF\u05C1-\u05C5\u05C7]+")
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(pattern2 "[\u05D0-\u05F2]\u200D[\u0591-\u05BF\u05C1-\u05C5\u05C7]+"))
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(set-char-table-range
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composition-function-table '(#x591 . #x5C7)
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(list (vector pattern2 2 'hebrew-shape-gstring)
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(vector pattern1 1 'hebrew-shape-gstring)
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["[\u0591-\u05C7]" 0 font-shape-gstring]))
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(set-char-table-range
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composition-function-table #x5C0 nil)
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(set-char-table-range
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composition-function-table #x5C6 nil))
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(provide 'hebrew)
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;; arch-tag: 3ca04f32-3f1e-498e-af46-8267498ba5d9
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;;; hebrew.el ends here
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