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)
118 (when (and (boundp 'MULE) running-emacs-19)
119 (define-ccl-program ccl-decode-raw-text
124 (r2 &= (r0 == ?\x0a))
135 "Convert line-break code from CRLF to LF.")
137 (define-ccl-program ccl-encode-raw-text
140 (loop (write-read-repeat r0))))
141 "Pass through without any conversions.")
143 (define-ccl-program ccl-encode-raw-text-CRLF
151 "Convert line-break code from LF to CRLF.")
157 (cons ccl-decode-raw-text ccl-encode-raw-text))
163 (cons ccl-decode-raw-text ccl-encode-raw-text-CRLF))
170 ;;; @ without code-conversion
173 (defmacro as-binary-process (&rest body)
174 (` (let (selective-display ; Disable ^M to nl translation.
177 (default-process-coding-system (cons *noconv* *noconv*))
178 program-coding-system-alist)
181 (defmacro as-binary-input-file (&rest body)
183 (file-coding-system-for-read *noconv*)
187 (defmacro as-binary-output-file (&rest body)
189 (file-coding-system *noconv*)
193 (defalias 'set-process-input-coding-system 'set-process-coding-system)
195 (defun insert-file-contents-as-binary (filename
196 &optional visit beg end replace)
197 "Like `insert-file-contents', q.v., but don't code and format conversion.
198 Like `insert-file-contents-literary', but it allows find-file-hooks,
199 automatic uncompression, etc.
201 Namely this function ensures that only format decoding and character
202 code conversion will not take place."
203 (as-binary-input-file
204 ;; Returns list absolute file name and length of data inserted.
205 (insert-file-contents filename visit beg end replace)))
207 (defun insert-file-contents-as-raw-text (filename
208 &optional visit beg end replace)
209 "Like `insert-file-contents', q.v., but don't code and format conversion.
210 Like `insert-file-contents-literary', but it allows find-file-hooks,
211 automatic uncompression, etc.
212 Like `insert-file-contents-as-binary', but it converts line-break
216 (narrow-to-region (point)(point))
218 ;; Returns list absolute file name and length of data inserted.
219 (insert-file-contents-as-binary filename visit beg end replace)))
220 (goto-char (point-min))
221 (while (re-search-forward "\r$" nil t)
223 (list (car return-val) (buffer-size))))))
225 (defun insert-binary-file-contents-literally (filename
226 &optional visit beg end replace)
227 "Like `insert-file-contents-literally', q.v., but don't code conversion.
228 A buffer may be modified in several ways after reading into the buffer due
229 to advanced Emacs features, such as file-name-handlers, format decoding,
230 find-file-hooks, etc.
231 This function ensures that none of these modifications will take place."
232 (as-binary-input-file
233 ;; Returns list absolute file name and length of data inserted.
234 (insert-file-contents-literally filename visit beg end replace)))
237 (running-emacs-19_29-or-later
238 ;; for MULE 2.3 based on Emacs 19.34.
239 (defun write-region-as-binary (start end filename
240 &optional append visit lockname)
241 "Like `write-region', q.v., but don't code conversion."
242 (as-binary-output-file
243 (write-region start end filename append visit lockname)))
245 (defun write-region-as-raw-text-CRLF (start end filename
246 &optional append visit lockname)
247 "Like `write-region', q.v., but don't code conversion."
248 (let ((the-buf (current-buffer)))
250 (insert-buffer-substring the-buf start end)
251 (goto-char (point-min))
252 (while (re-search-forward "\\(\\=\\|[^\r]\\)\n" nil t)
253 (replace-match "\\1\r\n"))
254 (write-region-as-binary (point-min)(point-max)
255 filename append visit lockname))))
257 (defun find-file-noselect-as-binary (filename &optional nowarn rawfile)
258 "Like `find-file-noselect', q.v., but don't code and format conversion."
259 (as-binary-input-file (find-file-noselect filename nowarn rawfile)))
262 ;; for MULE 2.3 based on Emacs 19.28.
263 (defun write-region-as-binary (start end filename
264 &optional append visit lockname)
265 "Like `write-region', q.v., but don't code conversion."
266 (as-binary-output-file
267 (write-region start end filename append visit)))
269 (defun write-region-as-raw-text-CRLF (start end filename
270 &optional append visit lockname)
271 "Like `write-region', q.v., but don't code conversion."
272 (let ((the-buf (current-buffer)))
274 (insert-buffer-substring the-buf start end)
275 (goto-char (point-min))
276 (while (re-search-forward "\\(\\=\\|[^\r]\\)\n" nil t)
277 (replace-match "\\1\r\n"))
278 (write-region-as-binary (point-min)(point-max)
279 filename append visit))))
281 (defun find-file-noselect-as-binary (filename &optional nowarn rawfile)
282 "Like `find-file-noselect', q.v., but don't code and format conversion."
283 (as-binary-input-file (find-file-noselect filename nowarn)))
286 (defun find-file-noselect-as-raw-text (filename &optional nowarn rawfile)
287 "Like `find-file-noselect', q.v., but it does not code and format conversion
288 except for line-break code."
291 (set-buffer (find-file-noselect-as-binary filename nowarn rawfile))
292 (let ((flag (buffer-modified-p)))
294 (goto-char (point-min))
295 (while (re-search-forward "\r$" nil t)
297 (set-buffer-modified-p flag)))))
299 (defun open-network-stream-as-binary (name buffer host service)
300 "Like `open-network-stream', q.v., but don't code conversion."
301 (let ((process (open-network-stream name buffer host service)))
302 (set-process-coding-system process *noconv* *noconv*)
306 ;;; @ with code-conversion
309 (defun insert-file-contents-as-coding-system
310 (coding-system filename &optional visit beg end replace)
311 "Like `insert-file-contents', q.v., but CODING-SYSTEM the first arg will
312 be applied to `file-coding-system-for-read'."
313 (let ((file-coding-system-for-read coding-system))
314 (insert-file-contents filename visit beg end replace)))
317 (running-emacs-19_29-or-later
318 ;; for MULE 2.3 based on Emacs 19.34.
319 (defun write-region-as-coding-system
320 (coding-system start end filename &optional append visit lockname)
321 "Like `write-region', q.v., but CODING-SYSTEM the first arg will be
322 applied to `file-coding-system'."
323 (let ((file-coding-system coding-system)
324 jka-compr-compression-info-list jam-zcat-filename-list)
325 (write-region start end filename append visit lockname)))
327 (defun find-file-noselect-as-coding-system
328 (coding-system filename &optional nowarn rawfile)
329 "Like `find-file-noselect', q.v., but CODING-SYSTEM the first arg will
330 be applied to `file-coding-system-for-read'."
331 (let ((file-coding-system-for-read coding-system))
332 (find-file-noselect filename nowarn rawfile)))
335 ;; for MULE 2.3 based on Emacs 19.28.
336 (defun write-region-as-coding-system
337 (coding-system start end filename &optional append visit lockname)
338 "Like `write-region', q.v., but CODING-SYSTEM the first arg will be
339 applied to `file-coding-system'."
340 (let ((file-coding-system coding-system)
341 jka-compr-compression-info-list jam-zcat-filename-list)
342 (write-region start end filename append visit)))
344 (defun find-file-noselect-as-coding-system
345 (coding-system filename &optional nowarn rawfile)
346 "Like `find-file-noselect', q.v., but CODING-SYSTEM the first arg will
347 be applied to `file-coding-system-for-read'."
348 (let ((file-coding-system-for-read coding-system))
349 (find-file-noselect filename nowarn)))
353 ;;; @ buffer representation
356 (defsubst-maybe set-buffer-multibyte (flag)
357 "Set the multibyte flag of the current buffer to FLAG.
358 If FLAG is t, this makes the buffer a multibyte buffer.
359 If FLAG is nil, this makes the buffer a single-byte buffer.
360 The buffer contents remain unchanged as a sequence of bytes
361 but the contents viewed as characters do change.
362 \[Emacs 20.3 emulating function]"
370 (defalias 'char-charset 'char-leading-char)
372 (defun split-char (character)
373 "Return list of charset and one or two position-codes of CHARACTER."
374 (let ((p (1- (char-bytes character)))
377 (setq dest (cons (- (char-component character p) 128) dest)
379 (cons (char-charset character) dest)))
381 (defmacro char-next-index (char index)
382 "Return index of character succeeding CHAR whose index is INDEX."
383 (` (+ (, index) (char-bytes (, char)))))
385 (if (subr-fboundp 'char-before)
389 (when (and (eq (car (get (car err) 'error-conditions))
390 'wrong-number-of-arguments)
391 (not (boundp 'si:char-before)))
392 (fset 'si:char-before (symbol-function 'char-before))
393 (defun char-before (&optional pos)
394 "Return character in current buffer preceding position POS.
395 POS is an integer or a buffer pointer.
396 If POS is out of range, the value is nil."
397 (si:char-before (or pos (point)))
400 (if (subr-fboundp 'char-after)
404 (when (and (eq (car (get (car err) 'error-conditions))
405 'wrong-number-of-arguments)
406 (not (boundp 'si:char-after)))
407 (fset 'si:char-after (symbol-function 'char-after))
408 (defun char-after (&optional pos)
409 "Return character in current buffer at position POS.
410 POS is an integer or a buffer pointer.
411 If POS is out of range, the value is nil."
412 (si:char-after (or pos (point)))
415 ;;; @@ obsoleted aliases
417 ;;; You should not use them.
419 (defalias 'char-length 'char-bytes)
420 ;;(defalias 'char-columns 'char-width)
426 (defalias 'string-columns 'string-width)
428 (defalias 'string-to-int-list 'string-to-char-list)
430 (or (fboundp 'truncate-string)
431 ;; Imported from Mule-2.3
432 (defun truncate-string (str width &optional start-column)
434 Truncate STR to fit in WIDTH columns.
435 Optional non-nil arg START-COLUMN specifies the starting column.
436 \[emu-mule.el; Mule 2.3 emulating function]"
438 (setq start-column 0))
439 (let ((max-width (string-width str))
444 (if (>= width max-width)
445 (setq width max-width))
446 (if (>= start-column width)
448 (while (< column start-column)
449 (setq ch (aref str from)
450 column (+ column (char-width ch))
451 from (+ from (char-bytes ch))))
452 (if (< width max-width)
455 (while (<= column width)
456 (setq ch (aref str to)
457 column (+ column (char-width ch))
459 to (+ to (char-bytes ch))))
461 (substring str from to))))
464 (defalias 'looking-at-as-unibyte 'looking-at)
472 ;;; poem-om.el ends here