1 ;;; poem-om.el --- poem implementation for Mule 1.* and Mule 2.*
3 ;; Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
6 ;; Keywords: emulation, compatibility, Mule
8 ;; This file is part of APEL (A Portable Emacs Library).
10 ;; This program is free software; you can redistribute it and/or
11 ;; modify it under the terms of the GNU General Public License as
12 ;; published by the Free Software Foundation; either version 2, or (at
13 ;; your option) any later version.
15 ;; This program is distributed in the hope that it will be useful, but
16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ;; General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
30 ;;; @ version specific features
33 (cond ((= emacs-major-version 19)
34 ;; Suggested by SASAKI Osamu <osamu@shuugr.bekkoame.or.jp>
35 ;; (cf. [os2-emacs-ja:78])
36 (defun fontset-pixel-size (fontset)
37 (let* ((font (get-font-info
38 (aref (cdr (get-fontset-info fontset)) 0)))
43 (let ((pat (aref font 1)))
44 (if (string-match "-[0-9]+-" pat)
47 pat (1+ (match-beginning 0)) (1- (match-end 0))))
56 (defalias 'make-char 'make-character)
58 (defalias 'find-non-ascii-charset-string 'find-charset-string)
59 (defalias 'find-non-ascii-charset-region 'find-charset-region)
61 (defalias 'charset-bytes 'char-bytes)
62 (defalias 'charset-description 'char-description)
63 (defalias 'charset-registry 'char-registry)
64 (defalias 'charset-columns 'char-width)
65 (defalias 'charset-direction 'char-direction)
67 (defun charset-chars (charset)
68 "Return the number of characters per dimension of CHARSET."
69 (if (= (logand (nth 2 (character-set charset)) 1) 1)
77 (defun encode-coding-region (start end coding-system)
78 "Encode the text between START and END to CODING-SYSTEM.
79 \[EMACS 20 emulating function]"
80 ;; If `coding-system' is nil, do nothing.
81 (code-convert-region start end *internal* coding-system))
83 (defun decode-coding-region (start end coding-system)
84 "Decode the text between START and END which is encoded in CODING-SYSTEM.
85 \[EMACS 20 emulating function]"
86 ;; If `coding-system' is nil, do nothing.
87 (code-convert-region start end coding-system *internal*))
89 ;; XXX: Should we support optional NOCOPY argument? (only in Emacs 20.x)
90 (defun encode-coding-string (str coding-system)
91 "Encode the STRING to CODING-SYSTEM.
92 \[EMACS 20 emulating function]"
94 (code-convert-string str *internal* coding-system)
95 ;;(code-convert-string str *internal* nil) returns nil instead of str.
98 ;; XXX: Should we support optional NOCOPY argument? (only in Emacs 20.x)
99 (defun decode-coding-string (str coding-system)
100 "Decode the string STR which is encoded in CODING-SYSTEM.
101 \[EMACS 20 emulating function]"
103 (let ((len (length str))
105 (while (and (< 0 len)
108 (substring str 0 len)
109 coding-system *internal*))))
111 (concat ret (substring str len)))
114 (defalias 'detect-coding-region 'code-detect-region)
116 (defalias 'set-buffer-file-coding-system 'set-file-coding-system)
119 ;;; @ without code-conversion
122 (defmacro as-binary-process (&rest body)
123 (` (let (selective-display ; Disable ^M to nl translation.
126 (default-process-coding-system (cons *noconv* *noconv*))
127 program-coding-system-alist)
130 (defmacro as-binary-input-file (&rest body)
132 (file-coding-system-for-read *noconv*)
136 (defmacro as-binary-output-file (&rest body)
138 (file-coding-system *noconv*)
142 (defalias 'set-process-input-coding-system 'set-process-coding-system)
144 (defun insert-file-contents-as-binary (filename
145 &optional visit beg end replace)
146 "Like `insert-file-contents', q.v., but don't code and format conversion.
147 Like `insert-file-contents-literary', but it allows find-file-hooks,
148 automatic uncompression, etc.
150 Namely this function ensures that only format decoding and character
151 code conversion will not take place."
152 (as-binary-input-file
153 ;; Returns list absolute file name and length of data inserted.
154 (insert-file-contents filename visit beg end replace)))
156 (defun insert-file-contents-as-raw-text (filename
157 &optional visit beg end replace)
158 "Like `insert-file-contents', q.v., but don't code and format conversion.
159 Like `insert-file-contents-literary', but it allows find-file-hooks,
160 automatic uncompression, etc.
161 Like `insert-file-contents-as-binary', but it converts line-break
165 (narrow-to-region (point)(point))
167 ;; Returns list absolute file name and length of data inserted.
168 (insert-file-contents-as-binary filename visit beg end replace)))
169 (goto-char (point-min))
170 (while (re-search-forward "\r$" nil t)
172 (list (car return-val) (buffer-size))))))
174 (defun insert-binary-file-contents-literally (filename
175 &optional visit beg end replace)
176 "Like `insert-file-contents-literally', q.v., but don't code conversion.
177 A buffer may be modified in several ways after reading into the buffer due
178 to advanced Emacs features, such as file-name-handlers, format decoding,
179 find-file-hooks, etc.
180 This function ensures that none of these modifications will take place."
181 (as-binary-input-file
182 ;; Returns list absolute file name and length of data inserted.
183 (insert-file-contents-literally filename visit beg end replace)))
186 (running-emacs-19_29-or-later
187 ;; for MULE 2.3 based on Emacs 19.34.
188 (defun write-region-as-binary (start end filename
189 &optional append visit lockname)
190 "Like `write-region', q.v., but don't code conversion."
191 (as-binary-output-file
192 (write-region start end filename append visit lockname)))
194 (defun write-region-as-raw-text-CRLF (start end filename
195 &optional append visit lockname)
196 "Like `write-region', q.v., but don't code conversion."
197 (let ((the-buf (current-buffer)))
199 (insert-buffer-substring the-buf start end)
200 (goto-char (point-min))
201 (while (re-search-forward "\\(\\=\\|[^\r]\\)\n" nil t)
202 (replace-match "\\1\r\n"))
203 (write-region-as-binary (point-min)(point-max)
204 filename append visit lockname))))
207 ;; for MULE 2.3 based on Emacs 19.28.
208 (defun write-region-as-binary (start end filename
209 &optional append visit lockname)
210 "Like `write-region', q.v., but don't code conversion."
211 (as-binary-output-file
212 (write-region start end filename append visit)))
214 (defun write-region-as-raw-text-CRLF (start end filename
215 &optional append visit lockname)
216 "Like `write-region', q.v., but don't code conversion."
217 (let ((the-buf (current-buffer)))
219 (insert-buffer-substring the-buf start end)
220 (goto-char (point-min))
221 (while (re-search-forward "\\(\\=\\|[^\r]\\)\n" nil t)
222 (replace-match "\\1\r\n"))
223 (write-region-as-binary (point-min)(point-max)
224 filename append visit))))
228 ;;; @ buffer representation
231 (defsubst-maybe set-buffer-multibyte (flag)
232 "Set the multibyte flag of the current buffer to FLAG.
233 If FLAG is t, this makes the buffer a multibyte buffer.
234 If FLAG is nil, this makes the buffer a single-byte buffer.
235 The buffer contents remain unchanged as a sequence of bytes
236 but the contents viewed as characters do change.
237 \[Emacs 20.3 emulating function]"
245 (defalias 'char-charset 'char-leading-char)
247 (defun split-char (character)
248 "Return list of charset and one or two position-codes of CHARACTER."
249 (let ((p (1- (char-bytes character)))
252 (setq dest (cons (- (char-component character p) 128) dest)
254 (cons (char-charset character) dest)))
256 (defmacro char-next-index (char index)
257 "Return index of character succeeding CHAR whose index is INDEX."
258 (` (+ (, index) (char-bytes (, char)))))
260 (if (subr-fboundp 'char-before)
264 (when (and (eq (car (get (car err) 'error-conditions))
265 'wrong-number-of-arguments)
266 (not (boundp 'si:char-before)))
267 (fset 'si:char-before (symbol-function 'char-before))
268 (defun char-before (&optional pos)
269 "Return character in current buffer preceding position POS.
270 POS is an integer or a buffer pointer.
271 If POS is out of range, the value is nil."
272 (si:char-before (or pos (point)))
275 (if (subr-fboundp 'char-after)
279 (when (and (eq (car (get (car err) 'error-conditions))
280 'wrong-number-of-arguments)
281 (not (boundp 'si:char-after)))
282 (fset 'si:char-after (symbol-function 'char-after))
283 (defun char-after (&optional pos)
284 "Return character in current buffer at position POS.
285 POS is an integer or a buffer pointer.
286 If POS is out of range, the value is nil."
287 (si:char-after (or pos (point)))
290 ;;; @@ obsoleted aliases
292 ;;; You should not use them.
294 (defalias 'char-length 'char-bytes)
295 ;;(defalias 'char-columns 'char-width)
301 (defalias 'string-columns 'string-width)
303 (defalias 'string-to-int-list 'string-to-char-list)
305 (or (fboundp 'truncate-string)
306 ;; Imported from Mule-2.3
307 (defun truncate-string (str width &optional start-column)
309 Truncate STR to fit in WIDTH columns.
310 Optional non-nil arg START-COLUMN specifies the starting column.
311 \[emu-mule.el; Mule 2.3 emulating function]"
313 (setq start-column 0))
314 (let ((max-width (string-width str))
319 (if (>= width max-width)
320 (setq width max-width))
321 (if (>= start-column width)
323 (while (< column start-column)
324 (setq ch (aref str from)
325 column (+ column (char-width ch))
326 from (+ from (char-bytes ch))))
327 (if (< width max-width)
330 (while (<= column width)
331 (setq ch (aref str to)
332 column (+ column (char-width ch))
334 to (+ to (char-bytes ch))))
336 (substring str from to))))
339 (defalias 'looking-at-as-unibyte 'looking-at)
347 ;;; poem-om.el ends here