110 lines
3.5 KiB
EmacsLisp
110 lines
3.5 KiB
EmacsLisp
;;; w3m-ucs.el --- CCL programs to process Unicode.
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;; Copyright (C) 2001, 2005, 2007 TSUCHIYA Masatoshi <tsuchiya@namazu.org>
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;; Authors: TSUCHIYA Masatoshi <tsuchiya@namazu.org>,
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;; ARISAWA Akihiro <ari@mbf.sphere.ne.jp>
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;; Keywords: w3m, WWW, hypermedia
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;; This file is a part of emacs-w3m.
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;; This program 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 2, or (at your option)
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;; any later version.
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;; This program 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 this program; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;; This file contains CCL codes to handle UCS characters in emacs-w3m.
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;; For more detail about emacs-w3m, see:
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;;
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;; http://emacs-w3m.namazu.org/
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;; This module requires `Mule-UCS' package. It can be downloaded from:
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;;
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;; ftp://ftp.m17n.org/pub/mule/Mule-UCS/
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;;; Code:
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;; Enable XEmacs 21.5-Mule to compile this module anyway.
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(eval-when-compile
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(if (featurep 'xemacs)
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(let ((mucs-ignore-version-incompatibilities t))
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(defvar font-ccl-encoder-alist nil)
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(require 'un-define))))
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(require 'un-define)
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(require 'w3m-ccl)
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(eval-and-compile
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(autoload 'w3m-make-ccl-coding-system "w3m"))
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(defun w3m-ucs-to-char (codepoint)
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(condition-case nil
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(or (ucs-to-char codepoint) ?~)
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(error ?~)))
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(eval-and-compile
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(defconst w3m-ccl-get-ucs-codepoint-with-mule-ucs
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'(;; (1) Convert a set of r1 (charset-id) and r0 (codepoint) to a
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;; character in Emacs internal representation.
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(if (r0 > 255)
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((r4 = (r0 & 127))
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(r0 = (((r0 >> 7) * 96) + r4))
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(r0 |= (r1 << 16)))
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((r0 |= (r1 << 16))))
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;; (2) Convert a character in Emacs to a UCS codepoint.
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(call emacs-char-to-ucs-codepoint-conversion)
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(if (r0 <= 0)
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(write-repeat ?~))) ; unknown character.
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"CCL program to convert multibyte char to ucs with Mule-UCS."))
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(define-ccl-program w3m-euc-japan-mule-ucs-encoder
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`(4
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(loop
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,@w3m-ccl-write-euc-japan-character
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,@w3m-ccl-get-ucs-codepoint-with-mule-ucs
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,@w3m-ccl-generate-ncr)))
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(w3m-make-ccl-coding-system
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'w3m-euc-japan-mule-ucs ?E
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"ISO 2022 based EUC encoding for Japanese with w3m internal characters.
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A character that can not be encoded with `euc-japan' is converted to a
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UCS codepoint with Mule-UCS, and the codepoint is represented as a
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string which represents the character in Numeric Character
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References (NCR).
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(generated by `w3m')"
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'w3m-euc-japan-decoder
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'w3m-euc-japan-mule-ucs-encoder)
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(define-ccl-program w3m-iso-latin-1-mule-ucs-encoder
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`(4
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(loop
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,@w3m-ccl-write-iso-latin-1-character
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,@w3m-ccl-get-ucs-codepoint-with-mule-ucs
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,@w3m-ccl-generate-ncr)))
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(w3m-make-ccl-coding-system
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'w3m-iso-latin-1-mule-ucs ?1
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"ISO 2022 based 8-bit encoding for Latin-1 with w3m internal characters.
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A character that can not be encoded with `iso-latin-1' is converted to
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a UCS codepoint with Mule-UCS, and the codepoint is represented as a
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string which represents the character in Numeric Character
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References (NCR).
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(generated by `w3m')"
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'w3m-iso-latin-1-decoder
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'w3m-iso-latin-1-mule-ucs-encoder)
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(provide 'w3m-ucs)
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;;; w3m-ucs.el ends here.
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