Source

emacs / lisp / dos-w32.el

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
;; dos-w32.el --- Functions shared among MS-DOS and W32 (NT/95) platforms

;; Copyright (C) 1996 Free Software Foundation, Inc.

;; Maintainer: Geoff Voelker <voelker@cs.washington.edu>
;; Keywords: internal

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs 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.

;;; Commentary:

;; Parts of this code are duplicated functions taken from dos-fns.el
;; and winnt.el.

;;; Code:

;; Use ";" instead of ":" as a path separator (from files.el).
(setq path-separator ";")

(setq minibuffer-history-case-insensitive-variables
      (cons 'file-name-history minibuffer-history-case-insensitive-variables))

;; Set the null device (for compile.el).
(setq null-device "NUL")

;; For distinguishing file types based upon suffixes.
(defvar file-name-buffer-file-type-alist
  '(
    ("[:/].*config.sys$" . nil)		; config.sys text
    ("\\.\\(obj\\|exe\\|com\\|lib\\|sys\\|bin\\|ico\\|pif\\|class\\)$" . t)
					; MS-Dos stuff
    ("\\.\\(dll\\|drv\\|386\\|vxd\\|fon\\|fnt\\|fot\\|ttf\\|grp\\)$" . t)
					; Windows stuff
    ("\\.\\(bmp\\|wav\\|avi\\|mpg\\|jpg\\|tif\\|mov\\|au\\)$" . t)
					; known binary data files
    ("\\.\\(arc\\|zip\\|pak\\|lzh\\|zoo\\)$" . t)
					; Packers
    ("\\.\\(a\\|o\\|tar\\|z\\|gz\\|taz\\|jar\\)$" . t)
					; Unix stuff
    ("\\.sx[dmicw]$" . t)		; OpenOffice.org
    ("\\.tp[ulpw]$" . t)		; borland Pascal stuff
    ("[:/]tags$" . nil)			; emacs TAGS file
    )
  "*Alist for distinguishing text files from binary files.
Each element has the form (REGEXP . TYPE), where REGEXP is matched
against the file name, and TYPE is nil for text, t for binary.")

;; Return the pair matching filename on file-name-buffer-file-type-alist,
;; or nil otherwise.
(defun find-buffer-file-type-match (filename)
  (let ((alist file-name-buffer-file-type-alist)
	(found nil))
    (let ((case-fold-search t))
      (setq filename (file-name-sans-versions filename))
      (while (and (not found) alist)
	(if (string-match (car (car alist)) filename)
	    (setq found (car alist)))
	(setq alist (cdr alist)))
      found)))

;; Don't check for untranslated file systems here.
(defun find-buffer-file-type (filename)
  (let ((match (find-buffer-file-type-match filename))
	(code))
    (if (not match)
	default-buffer-file-type
      (setq code (cdr match))
      (cond ((memq code '(nil t)) code)
	    ((and (symbolp code) (fboundp code))
	     (funcall code filename))))))

(setq-default buffer-file-coding-system 'undecided-dos)

(defun find-buffer-file-type-coding-system (command)
  "Choose a coding system for a file operation.
If COMMAND is `insert-file-contents', the coding system is chosen based
upon the filename, the contents of `untranslated-filesystem-list' and
`file-name-buffer-file-type-alist', and whether the file exists:

  If it matches in `untranslated-filesystem-list':
    If the file exists:					`undecided'
    If the file does not exist:				`undecided-unix'
  If it matches in `file-name-buffer-file-type-alist':
    If the match is t (for binary):			`no-conversion'
    If the match is nil (for dos-text):			`undecided-dos'
  Otherwise:
    If the file exists:					`undecided'
    If the file does not exist:	       default-buffer-file-coding-system

If COMMAND is `write-region', the coding system is chosen based upon
the value of `buffer-file-coding-system' and `buffer-file-type'. If
`buffer-file-coding-system' is non-nil, its value is used.  If it is
nil and `buffer-file-type' is t, the coding system is `no-conversion'.
Otherwise, it is `undecided-dos'.

The two most common situations are when DOS and Unix files are read
and written, and their names do not match in
`untranslated-filesystem-list' and `file-name-buffer-file-type-alist'.
In these cases, the coding system initially will be `undecided'.  As
the file is read in the DOS case, the coding system will be changed to
`undecided-dos' as CR/LFs are detected.  As the file is read in the
Unix case, the coding system will be changed to `undecided-unix' as
LFs are detected.  In both cases, `buffer-file-coding-system' will be
set to the appropriate coding system, and the value of
`buffer-file-coding-system' will be used when writing the file."

  (let ((op (nth 0 command))
	(target)
	(binary nil) (text nil)
	(undecided nil) (undecided-unix nil))
    (cond ((eq op 'insert-file-contents)
	   (setq target (nth 1 command))
	   ;; First check for a file name that indicates
	   ;; it is truly binary.
	   (setq binary (find-buffer-file-type target))
	   (cond (binary)
		 ;; Next check for files that MUST use DOS eol conversion.
		 ((find-buffer-file-type-match target)
		  (setq text t))
		 ;; For any other existing file, decide based on contents.
		 ((file-exists-p target)
		  (setq undecided t))
		 ;; Next check for a non-DOS file system.
		 ((untranslated-file-p target)
		  (setq undecided-unix t)))
	   (cond (binary '(no-conversion . no-conversion))
		 (text '(undecided-dos . undecided-dos))
		 (undecided-unix '(undecided-unix . undecided-unix))
		 (undecided '(undecided . undecided))
		 (t (cons default-buffer-file-coding-system
			  default-buffer-file-coding-system))))
	  ((eq op 'write-region)
	   (if buffer-file-coding-system
	       (cons buffer-file-coding-system
		     buffer-file-coding-system)
	     ;; Normally this is used only in a non-file-visiting
	     ;; buffer, because normally buffer-file-coding-system is non-nil
	     ;; in a file-visiting buffer.
	     (if buffer-file-type
		 '(no-conversion . no-conversion)
	       '(undecided-dos . undecided-dos)))))))

(modify-coding-system-alist 'file "" 'find-buffer-file-type-coding-system)

(defun find-file-binary (filename)
  "Visit file FILENAME and treat it as binary."
  (interactive "FFind file binary: ")
  (let ((file-name-buffer-file-type-alist '(("" . t))))
    (find-file filename)))

(defun find-file-text (filename)
  "Visit file FILENAME and treat it as a text file."
  (interactive "FFind file text: ")
  (let ((file-name-buffer-file-type-alist '(("" . nil))))
    (find-file filename)))

(defun find-file-not-found-set-buffer-file-coding-system ()
  (save-excursion
    (set-buffer (current-buffer))
    (let ((coding buffer-file-coding-system))
      ;; buffer-file-coding-system is already set by
      ;; find-operation-coding-system, which was called from
      ;; insert-file-contents.  All that's left is to change
      ;; the EOL conversion, if required by the user.
      (when (and (null coding-system-for-read)
		 (or inhibit-eol-conversion
		     (untranslated-file-p (buffer-file-name))))
	(setq coding (coding-system-change-eol-conversion coding 0))
	(setq buffer-file-coding-system coding))
      (setq buffer-file-type (eq buffer-file-coding-system 'no-conversion)))))

;;; To set the default coding system on new files.
(add-hook 'find-file-not-found-hooks
	  'find-file-not-found-set-buffer-file-coding-system)

;;; To accomodate filesystems that do not require CR/LF translation.
(defvar untranslated-filesystem-list nil
  "List of filesystems that require no CR/LF translation when reading
and writing files.  Each filesystem in the list is a string naming
the directory prefix corresponding to the filesystem.")

(defun untranslated-canonical-name (filename)
  "Return FILENAME in a canonicalized form for use with the functions
dealing with untranslated filesystems."
  (if (memq system-type '(ms-dos windows-nt cygwin))
      ;; The canonical form for DOS/W32 is with A-Z downcased and all
      ;; directory separators changed to directory-sep-char.
      (let ((name nil))
	(setq name (mapconcat
		    '(lambda (char)
		       (if (and (<= ?A char) (<= char ?Z))
			   (char-to-string (+ (- char ?A) ?a))
			 (char-to-string char)))
		    filename nil))
	;; Use expand-file-name to canonicalize directory separators, except
	;; with bare drive letters (which would have the cwd appended).
	;; Avoid expanding names that could trigger ange-ftp to prompt
	;; for passwords, though.
	(if (or (string-match "^.:$" name)
		(string-match "^/[^/:]+:" name))
	    name
	  (expand-file-name name)))
    filename))

(defun untranslated-file-p (filename)
  "Return t if FILENAME is on a filesystem that does not require
CR/LF translation, and nil otherwise."
  (let ((fs (untranslated-canonical-name filename))
	(ufs-list untranslated-filesystem-list)
	(found nil))
    (while (and (not found) ufs-list)
      (if (string-match (concat "^" (car ufs-list)) fs)
	  (setq found t)
	(setq ufs-list (cdr ufs-list))))
    found))

(defun add-untranslated-filesystem (filesystem)
  "Add FILESYSTEM to the list of filesystems that do not require
CR/LF translation.  FILESYSTEM is a string containing the directory
prefix corresponding to the filesystem.  For example, for a Unix
filesystem mounted on drive Z:, FILESYSTEM could be \"Z:\"."
  ;; We use "D", not "f", to avoid confusing the user: "f" prompts
  ;; with a directory, but RET returns the current buffer's file, not
  ;; its directory.
  (interactive "DUntranslated file system: ")
  (let ((fs (untranslated-canonical-name filesystem)))
    (if (member fs untranslated-filesystem-list)
	untranslated-filesystem-list
      (setq untranslated-filesystem-list
	    (cons fs untranslated-filesystem-list)))))

(defun remove-untranslated-filesystem (filesystem)
  "Remove FILESYSTEM from the list of filesystems that do not require
CR/LF translation.  FILESYSTEM is a string containing the directory
prefix corresponding to the filesystem.  For example, for a Unix
filesystem mounted on drive Z:, FILESYSTEM could be \"Z:\"."
  (interactive "fUntranslated file system: ")
  (setq untranslated-filesystem-list
	(delete (untranslated-canonical-name filesystem)
		untranslated-filesystem-list)))

;;; Support for printing under DOS/Windows, see lpr.el and ps-print.el.

(defvar direct-print-region-use-command-dot-com t
  "*Control whether command.com is used to print on Windows 9x.")

;; Function to actually send data to the printer port.
;; Supports writing directly, and using various programs.
(defun direct-print-region-helper (printer
				   start end
				   lpr-prog
				   delete-text buf display
				   rest)
  (let* (;; Ignore case when matching known external program names.
	 (case-fold-search t)
	 ;; Convert / to \ in printer name, for sake of external programs.
	 (printer
	  (if (stringp printer)
	      (subst-char-in-string ?/ ?\\ printer)
	    printer))
	 ;; Find a directory that is local, to work-around Windows bug.
	 (safe-dir
	  (let ((safe-dirs (list "c:/" (getenv "windir") (getenv "TMPDIR"))))
	    (while (not (file-attributes (car safe-dirs)))
	      (setq safe-dirs (cdr safe-dirs)))
	    (car safe-dirs)))
	 (tempfile
	  (subst-char-in-string
	   ?/ ?\\
	   (make-temp-name
	    (expand-file-name "EP" temporary-file-directory))))
	 ;; capture output for diagnosis
	 (errbuf (list (get-buffer-create " *print-region-helper*") t)))
    ;; It seems that we must be careful about the directory name that
    ;; gets added to the printer port name by write-region when using
    ;; the standard "PRN" or "LPTx" ports, because the write can fail if
    ;; the directory is on a network drive.  The same is true when
    ;; asking command.com to copy the file.
    ;; No action is needed for UNC printer names, which is just as well
    ;; because `expand-file-name' doesn't support UNC names on MS-DOS.
    (if (and (stringp printer) (not (string-match "^\\\\" printer)))
	(setq printer
	      (subst-char-in-string ?/ ?\\ (expand-file-name printer safe-dir))))
    ;; Handle known programs specially where necessary.
    (unwind-protect
	(cond
	 ;; nprint.exe is the standard print command on Netware
	 ((string-match "^nprint\\(\\.exe\\)?$" (file-name-nondirectory lpr-prog))
	  (write-region start end tempfile nil 0)
	  (call-process lpr-prog nil errbuf nil
			tempfile (concat "P=" printer)))
	 ;; print.exe is a standard command on NT
	 ((string-match "^print\\(\\.exe\\)?$" (file-name-nondirectory lpr-prog))
	  ;; Be careful not to invoke print.exe on MS-DOS or Windows 9x
	  ;; though, because it is a TSR program there (hangs Emacs).
	  (or (and (eq system-type 'windows-nt)
		   (null (getenv "winbootdir")))
	      (error "Printing via print.exe is not supported on MS-DOS or Windows 9x"))
	  ;; It seems that print.exe always appends a form-feed so we
	  ;; should make sure to omit the last FF in the data.
	  (if (and (> end start)
		   (char-equal (char-before end) ?\C-l))
	      (setq end (1- end)))
	  ;; cancel out annotate function for non-PS case
	  (let ((write-region-annotate-functions nil))
	    (write-region start end tempfile nil 0))
	  (call-process lpr-prog nil errbuf nil
			(concat "/D:" printer) tempfile))
	 ;; support lpr and similar programs for convenience, but
	 ;; supply an explicit filename because the NT version of lpr
	 ;; can't read from stdin.
	 ((> (length lpr-prog) 0)
	  (write-region start end tempfile nil 0)
	  (setq rest (append rest (list tempfile)))
	  (apply 'call-process lpr-prog nil errbuf nil rest))
	 ;; Run command.com to access printer port on Windows 9x, unless
	 ;; we are supposed to append to an existing (non-empty) file,
	 ;; to work around a bug in Windows 9x that prevents Win32
	 ;; programs from accessing LPT ports reliably.
	 ((and (eq system-type 'windows-nt)
	       (getenv "winbootdir")
	       ;; Allow cop-out so command.com isn't invoked
	       direct-print-region-use-command-dot-com
	       ;; file-attributes fails on LPT ports on Windows 9x but
	       ;; not on NT, so handle both cases for safety.
	       (eq (or (nth 7 (file-attributes printer)) 0) 0))
	  (write-region start end tempfile nil 0)
	  (let ((w32-quote-process-args nil))
	    (call-process "command.com" nil errbuf nil "/c"
			  (format "copy /b %s %s" tempfile printer))))
	 ;; write directly to the printer port
	 (t
	  (write-region start end printer t 0)))
      ;; ensure we remove the tempfile if created
      (if (file-exists-p tempfile)
	  (delete-file tempfile)))))

(defvar printer-name)

(defun direct-print-region-function (start end
					   &optional lpr-prog
					   delete-text buf display
					   &rest rest)
  "DOS/Windows-specific function to print the region on a printer.
Writes the region to the device or file which is a value of
`printer-name' \(which see\), unless the value of `lpr-command'
indicates a specific program should be invoked."

  ;; DOS printers need the lines to end with CR-LF pairs, so make
  ;; sure it always happens that way, unless the buffer is binary.
  (let* ((coding coding-system-for-write)
	 (coding-base
	  (if (null coding) 'undecided (coding-system-base coding)))
	 (eol-type (coding-system-eol-type coding-base))
	 ;; Make each print-out eject the final page, but don't waste
	 ;; paper if the file ends with a form-feed already.
	 (write-region-annotate-functions
	  (cons
	   (lambda (start end)
	     (if (not (char-equal (char-before end) ?\C-l))
		 `((,end . "\f"))))
	   write-region-annotate-functions))
	 (printer (or (and (boundp 'dos-printer)
			   (stringp (symbol-value 'dos-printer))
			   (symbol-value 'dos-printer))
		      printer-name)))
    (or (eq coding-system-for-write 'no-conversion)
	(setq coding-system-for-write
	      (aref eol-type 1)))	; force conversion to DOS EOLs
    (direct-print-region-helper printer start end lpr-prog
				delete-text buf display rest)))

(setq print-region-function 'direct-print-region-function)

;; Set this to nil if you have a port of the `pr' program
;; (e.g., from GNU Textutils), or if you have an `lpr'
;; program (see above) that can print page headers.
;; If `lpr-headers-switches' is non-nil (the default) and
;; `print-region-function' is set to `dos-print-region-function',
;; then requests to print page headers will be silently
;; ignored, and `print-buffer' and `print-region' produce
;; the same output as `lpr-buffer' and `lpr-region', accordingly.
(setq lpr-headers-switches "(page headers are not supported)")

(defvar ps-printer-name)

(defun direct-ps-print-region-function (start end
					      &optional lpr-prog
					      delete-text buf display
					      &rest rest)
  "DOS/Windows-specific function to print the region on a PostScript printer.
Writes the region to the device or file which is a value of
`ps-printer-name' \(which see\), unless the value of `ps-lpr-command'
indicates a specific program should be invoked."

  (let ((printer (or (and (boundp 'dos-ps-printer)
			  (stringp (symbol-value 'dos-ps-printer))
			  (symbol-value 'dos-ps-printer))
		     ps-printer-name)))
    (direct-print-region-helper printer start end lpr-prog
				delete-text buf display rest)))

(setq ps-print-region-function 'direct-ps-print-region-function)

;(setq ps-lpr-command "gs")

;(setq ps-lpr-switches '("-q" "-dNOPAUSE" "-sDEVICE=epson" "-r240x60"
;			  "-sOutputFile=LPT1"))

(provide 'dos-w32)

;;; dos-w32.el ends here
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.