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emu-nemacs.el
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emu-nemacs.el
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;;; emu-nemacs.el --- emu API implementation for NEmacs
;; Copyright (C) 1995,1996,1997 MORIOKA Tomohiko
;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Version: $Id$
;; Keywords: emulation, compatibility, NEmacs, mule
;; This file is part of emu.
;; This program 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.
;; This program 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Code:
(require 'emu-18)
;;; @ character set
;;;
(defconst charset-ascii 0 "Character set of ASCII")
(defconst charset-jisx0208 146 "Character set of JIS X0208-1983")
(defun charset-description (charset)
"Return description of CHARSET. [emu-nemacs.el]"
(if (< charset 128)
(documentation-property 'charset-ascii 'variable-documentation)
(documentation-property 'charset-jisx0208 'variable-documentation)
))
(defun charset-registry (charset)
"Return registry name of CHARSET. [emu-nemacs.el]"
(if (< charset 128)
"ASCII"
"JISX0208.1983"))
(defun charset-columns (charset)
"Return number of columns a CHARSET occupies when displayed.
\[emu-nemacs.el]"
(if (< charset 128)
1
2))
(defun charset-direction (charset)
"Return the direction of a character of CHARSET by
0 (left-to-right) or 1 (right-to-left). [emu-nemacs.el]"
0)
(defun find-charset-string (str)
"Return a list of charsets in the string.
\[emu-nemacs.el; Mule emulating function]"
(if (string-match "[\200-\377]" str)
(list lc-jp)
))
(defalias 'find-non-ascii-charset-string 'find-charset-string)
(defun find-charset-region (start end)
"Return a list of charsets in the region between START and END.
\[emu-nemacs.el; Mule emulating function]"
(if (save-excursion
(save-restriction
(narrow-to-region start end)
(goto-char start)
(re-search-forward "[\200-\377]" nil t)
))
(list lc-jp)
))
(defalias 'find-non-ascii-charset-region 'find-charset-region)
(defun check-ASCII-string (str)
(let ((i 0)
len)
(setq len (length str))
(catch 'label
(while (< i len)
(if (>= (elt str i) 128)
(throw 'label nil))
(setq i (+ i 1))
)
str)))
;;; @@ for old MULE emulation
;;;
(defconst lc-ascii 0)
(defconst lc-jp 146)
;;; @ coding system
;;;
(defconst *noconv* 0)
(defconst *sjis* 1)
(defconst *junet* 2)
(defconst *ctext* 2)
(defconst *internal* 3)
(defconst *euc-japan* 3)
(defun decode-coding-string (string coding-system)
"Decode the STRING which is encoded in CODING-SYSTEM.
\[emu-nemacs.el; EMACS 20 emulating function]"
(if (eq coding-system 3)
string
(convert-string-kanji-code string coding-system 3)
))
(defun encode-coding-string (string coding-system)
"Encode the STRING to CODING-SYSTEM.
\[emu-nemacs.el; EMACS 20 emulating function]"
(if (eq coding-system 3)
string
(convert-string-kanji-code string 3 coding-system)
))
(defun decode-coding-region (start end coding-system)
"Decode the text between START and END which is encoded in CODING-SYSTEM.
\[emu-nemacs.el; EMACS 20 emulating function]"
(if (/= ic oc)
(save-excursion
(save-restriction
(narrow-to-region start end)
(convert-region-kanji-code start end coding-system 3)
))))
(defun encode-coding-region (start end coding-system)
"Encode the text between START and END to CODING-SYSTEM.
\[emu-nemacs.el; EMACS 20 emulating function]"
(if (/= ic oc)
(save-excursion
(save-restriction
(narrow-to-region start end)
(convert-region-kanji-code start end 3 coding-system)
))))
(defun detect-coding-region (start end)
"Detect coding-system of the text in the region between START and END.
\[emu-nemacs.el; Emacs 20 emulating function]"
(if (save-excursion
(save-restriction
(narrow-to-region start end)
(goto-char start)
(re-search-forward "[\200-\377]" nil t)
))
*euc-japan*
))
(defalias 'set-buffer-file-coding-system 'set-kanji-fileio-code)
(defmacro as-binary-process (&rest body)
(` (let (selective-display ; Disable ^M to nl translation.
;; NEmacs
kanji-flag
(default-kanji-process-code 0)
program-kanji-code-alist)
(,@ body)
)))
(defmacro as-binary-input-file (&rest body)
(` (let (kanji-flag)
(,@ body)
)))
(defmacro as-binary-output-file (&rest body)
(` (let (kanji-flag)
(,@ body)
)))
;;; @@ for old MULE emulation
;;;
(defun code-convert-string (str ic oc)
"Convert code in STRING from SOURCE code to TARGET code,
On successful converion, returns the result string,
else returns nil. [emu-nemacs.el; Mule emulating function]"
(if (not (eq ic oc))
(convert-string-kanji-code str ic oc)
str))
(defun code-convert-region (beg end ic oc)
"Convert code of the text between BEGIN and END from SOURCE
to TARGET. On successful conversion returns t,
else returns nil. [emu-nemacs.el; Mule emulating function]"
(if (/= ic oc)
(save-excursion
(save-restriction
(narrow-to-region beg end)
(convert-region-kanji-code beg end ic oc)
))))
;;; @ binary access
;;;
(defun insert-binary-file-contents-literally
(filename &optional visit beg end replace)
"Like `insert-file-contents-literally', q.v., but don't code conversion.
A buffer may be modified in several ways after reading into the buffer due
to advanced Emacs features, such as file-name-handlers, format decoding,
find-file-hooks, etc.
This function ensures that none of these modifications will take place.
\[emu.el]"
(let (kanji-flag)
(insert-file-contents-literally filename visit beg end replace)
))
;;; @ MIME charset
;;;
(defvar charsets-mime-charset-alist
(list (cons (list charset-ascii) 'us-ascii)))
(defvar default-mime-charset 'iso-2022-jp)
(defvar mime-charset-coding-system-alist
'((iso-2022-jp . 2)
(shift_jis . 1)
))
(defun mime-charset-to-coding-system (charset)
(if (stringp charset)
(setq charset (intern (downcase charset)))
)
(cdr (assq charset mime-charset-coding-system-alist))
)
(defun detect-mime-charset-region (start end)
"Return MIME charset for region between START and END.
\[emu-nemacs.el]"
(if (save-excursion
(save-restriction
(narrow-to-region start end)
(goto-char start)
(re-search-forward "[\200-\377]" nil t)
))
default-mime-charset
'us-ascii))
(defun encode-mime-charset-region (start end charset)
"Encode the text between START and END as MIME CHARSET.
\[emu-nemacs.el]"
(let ((cs (mime-charset-to-coding-system charset)))
(and (numberp cs)
(or (= cs 3)
(save-excursion
(save-restriction
(narrow-to-region start end)
(convert-region-kanji-code start end 3 cs)
))
))))
(defun decode-mime-charset-region (start end charset)
"Decode the text between START and END as MIME CHARSET.
\[emu-nemacs.el]"
(let ((cs (mime-charset-to-coding-system charset)))
(and (numberp cs)
(or (= cs 3)
(save-excursion
(save-restriction
(narrow-to-region start end)
(convert-region-kanji-code start end cs 3)
))
))))
(defun encode-mime-charset-string (string charset)
"Encode the STRING as MIME CHARSET. [emu-nemacs.el]"
(let ((cs (mime-charset-to-coding-system charset)))
(if cs
(convert-string-kanji-code string 3 cs)
string)))
(defun decode-mime-charset-string (string charset)
"Decode the STRING as MIME CHARSET. [emu-nemacs.el]"
(let ((cs (mime-charset-to-coding-system charset)))
(if cs
(convert-string-kanji-code string cs 3)
string)))
;;; @ character
;;;
(defun char-charset (chr)
"Return the character set of char CHR.
\[emu-nemacs.el; XEmacs 20 emulating function]"
(if (< chr 128)
charset-ascii
charset-jisx0208))
(defun char-bytes (chr)
"Return number of bytes CHAR will occupy in a buffer.
\[emu-nemacs.el; Mule emulating function]"
(if (< chr 128) 1 2))
(defalias 'char-length 'char-bytes)
(defun char-columns (character)
"Return number of columns a CHARACTER occupies when displayed.
\[emu-nemacs.el]"
(if (< character 128)
1
2))
;;; @@ for Mule emulation
;;;
(defalias 'char-leading-char 'char-charset)
(defalias 'char-width 'char-columns)
;;; @ string
;;;
(defalias 'string-columns 'length)
(defun sref (str idx)
"Return the character in STR at index IDX.
\[emu-nemacs.el; Mule emulating function]"
(let ((chr (aref str idx)))
(if (< chr 128)
chr
(logior (lsh (aref str (1+ idx)) 8) chr)
)))
(defun string-to-char-list (str)
(let ((i 0)(len (length str)) dest chr)
(while (< i len)
(setq chr (aref str i))
(if (>= chr 128)
(setq i (1+ i)
chr (+ (lsh chr 8) (aref str i))
))
(setq dest (cons chr dest))
(setq i (1+ i))
)
(reverse dest)
))
(fset 'string-to-int-list (symbol-function 'string-to-char-list))
;;; Imported from Mule-2.3
(defun truncate-string (str width &optional start-column)
"Truncate STR to fit in WIDTH columns.
Optional non-nil arg START-COLUMN specifies the starting column.
\[emu-mule.el; Mule 2.3 emulating function]"
(or start-column
(setq start-column 0))
(let ((max-width (string-width str))
(len (length str))
(from 0)
(column 0)
to-prev to ch)
(if (>= width max-width)
(setq width max-width))
(if (>= start-column width)
""
(while (< column start-column)
(setq ch (aref str from)
column (+ column (char-columns ch))
from (+ from (char-bytes ch))))
(if (< width max-width)
(progn
(setq to from)
(while (<= column width)
(setq ch (aref str to)
column (+ column (char-columns ch))
to-prev to
to (+ to (char-bytes ch))))
(setq to to-prev)))
(substring str from to))))
;;; @@ for Mule emulation
;;;
(defalias 'string-width 'length)
;;; @ text property emulation
;;;
(defvar emu:available-face-attribute-alist
'(
;;(bold . inversed-region)
(italic . underlined-region)
(underline . underlined-region)
))
;; by YAMATE Keiichirou 1994/10/28
(defun attribute-add-narrow-attribute (attr from to)
(or (consp (symbol-value attr))
(set attr (list 1)))
(let* ((attr-value (symbol-value attr))
(len (car attr-value))
(posfrom 1)
posto)
(while (and (< posfrom len)
(> from (nth posfrom attr-value)))
(setq posfrom (1+ posfrom)))
(setq posto posfrom)
(while (and (< posto len)
(> to (nth posto attr-value)))
(setq posto (1+ posto)))
(if (= posto posfrom)
(if (= (% posto 2) 1)
(if (and (< to len)
(= to (nth posto attr-value)))
(set-marker (nth posto attr-value) from)
(setcdr (nthcdr (1- posfrom) attr-value)
(cons (set-marker-type (set-marker (make-marker)
from)
'point-type)
(cons (set-marker-type (set-marker (make-marker)
to)
nil)
(nthcdr posto attr-value))))
(setcar attr-value (+ len 2))))
(if (= (% posfrom 2) 0)
(setq posfrom (1- posfrom))
(set-marker (nth posfrom attr-value) from))
(if (= (% posto 2) 0)
nil
(setq posto (1- posto))
(set-marker (nth posto attr-value) to))
(setcdr (nthcdr posfrom attr-value)
(nthcdr posto attr-value)))))
(defalias 'make-overlay 'cons)
(defun overlay-put (overlay prop value)
(let ((ret (and (eq prop 'face)
(assq value emu:available-face-attribute-alist)
)))
(if ret
(attribute-add-narrow-attribute (cdr ret)
(car overlay)(cdr overlay))
)))
;;; @ end
;;;
(provide 'emu-nemacs)
;;; emu-nemacs.el ends here