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55535639 | 1 | ;;; server.el --- Lisp code for GNU Emacs running as server process |
c88ab9ce | 2 | |
92a6563f | 3 | ;; Copyright (C) 1986, 87, 92, 94, 95, 96, 97, 98, 99, 2000, 2001 |
0f5f7c3e | 4 | ;; Free Software Foundation, Inc. |
6d74b528 | 5 | |
630cc463 | 6 | ;; Author: William Sommerfeld <wesommer@athena.mit.edu> |
e4874521 | 7 | ;; Maintainer: FSF |
d7b4d18f | 8 | ;; Keywords: processes |
630cc463 | 9 | |
9ae0f972 | 10 | ;; Changes by peck@sun.com and by rms. |
11 | ||
12 | ;; This file is part of GNU Emacs. | |
13 | ||
14 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
15 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 16 | ;; the Free Software Foundation; either version 2, or (at your option) |
9ae0f972 | 17 | ;; any later version. |
18 | ||
19 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
20 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | ;; GNU General Public License for more details. | |
23 | ||
24 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
25 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
26 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
27 | ;; Boston, MA 02111-1307, USA. | |
9ae0f972 | 28 | |
630cc463 | 29 | ;;; Commentary: |
9ae0f972 | 30 | |
b578f267 EN |
31 | ;; This Lisp code is run in Emacs when it is to operate as |
32 | ;; a server for other processes. | |
9ae0f972 | 33 | |
b578f267 EN |
34 | ;; Load this library and do M-x server-edit to enable Emacs as a server. |
35 | ;; Emacs runs the program ../arch-lib/emacsserver as a subprocess | |
36 | ;; for communication with clients. If there are no client buffers to edit, | |
37 | ;; server-edit acts like (switch-to-buffer (other-buffer)) | |
9ae0f972 | 38 | |
b578f267 EN |
39 | ;; When some other program runs "the editor" to edit a file, |
40 | ;; "the editor" can be the Emacs client program ../lib-src/emacsclient. | |
41 | ;; This program transmits the file names to Emacs through | |
42 | ;; the server subprocess, and Emacs visits them and lets you edit them. | |
9ae0f972 | 43 | |
b578f267 | 44 | ;; Note that any number of clients may dispatch files to emacs to be edited. |
9ae0f972 | 45 | |
b578f267 EN |
46 | ;; When you finish editing a Server buffer, again call server-edit |
47 | ;; to mark that buffer as done for the client and switch to the next | |
48 | ;; Server buffer. When all the buffers for a client have been edited | |
49 | ;; and exited with server-edit, the client "editor" will return | |
50 | ;; to the program that invoked it. | |
9ae0f972 | 51 | |
b578f267 EN |
52 | ;; Your editing commands and Emacs's display output go to and from |
53 | ;; the terminal in the usual way. Thus, server operation is possible | |
54 | ;; only when Emacs can talk to the terminal at the time you invoke | |
55 | ;; the client. This is possible in four cases: | |
9ae0f972 | 56 | |
b578f267 EN |
57 | ;; 1. On a window system, where Emacs runs in one window and the |
58 | ;; program that wants to use "the editor" runs in another. | |
9ae0f972 | 59 | |
b578f267 EN |
60 | ;; 2. On a multi-terminal system, where Emacs runs on one terminal and the |
61 | ;; program that wants to use "the editor" runs on another. | |
9ae0f972 | 62 | |
b578f267 EN |
63 | ;; 3. When the program that wants to use "the editor" is running |
64 | ;; as a subprocess of Emacs. | |
9ae0f972 | 65 | |
b578f267 EN |
66 | ;; 4. On a system with job control, when Emacs is suspended, the program |
67 | ;; that wants to use "the editor" will stop and display | |
68 | ;; "Waiting for Emacs...". It can then be suspended, and Emacs can be | |
69 | ;; brought into the foreground for editing. When done editing, Emacs is | |
70 | ;; suspended again, and the client program is brought into the foreground. | |
9ae0f972 | 71 | |
b578f267 EN |
72 | ;; The buffer local variable "server-buffer-clients" lists |
73 | ;; the clients who are waiting for this buffer to be edited. | |
74 | ;; The global variable "server-clients" lists all the waiting clients, | |
75 | ;; and which files are yet to be edited for each. | |
630cc463 ER |
76 | |
77 | ;;; Code: | |
9ae0f972 | 78 | \f |
ab1c7f35 RS |
79 | (defgroup server nil |
80 | "Emacs running as a server process." | |
81 | :group 'external) | |
82 | ||
83 | (defcustom server-program (expand-file-name "emacsserver" exec-directory) | |
84 | "*The program to use as the edit server." | |
85 | :group 'server | |
86 | :type 'string) | |
87 | ||
88 | (defcustom server-visit-hook nil | |
89 | "*List of hooks to call when visiting a file for the Emacs server." | |
90 | :group 'server | |
91 | :type '(repeat function)) | |
92 | ||
93 | (defcustom server-switch-hook nil | |
94 | "*List of hooks to call when switching to a buffer for the Emacs server." | |
95 | :group 'server | |
96 | :type '(repeat function)) | |
97 | ||
98 | (defcustom server-done-hook nil | |
99 | "*List of hooks to call when done editing a buffer for the Emacs server." | |
100 | :group 'server | |
101 | :type '(repeat function)) | |
f9b3ef88 | 102 | |
9ae0f972 | 103 | (defvar server-process nil |
b5a9911c | 104 | "The current server process") |
9ae0f972 | 105 | |
b53d289e RS |
106 | (defvar server-previous-string "") |
107 | ||
9ae0f972 | 108 | (defvar server-clients nil |
109 | "List of current server clients. | |
e82e73c2 | 110 | Each element is (CLIENTID BUFFERS...) where CLIENTID is a string |
9ae0f972 | 111 | that can be given to the server process to identify a client. |
112 | When a buffer is marked as \"done\", it is removed from this list.") | |
113 | ||
114 | (defvar server-buffer-clients nil | |
b5a9911c | 115 | "List of client ids for clients requesting editing of current buffer.") |
faf931a8 | 116 | (make-variable-buffer-local 'server-buffer-clients) |
9ae0f972 | 117 | ;; Changing major modes should not erase this local. |
118 | (put 'server-buffer-clients 'permanent-local t) | |
119 | ||
ec40ed9f RS |
120 | (defvar server-window nil |
121 | "*The window to use for selecting Emacs server buffers. | |
122 | If nil, use the selected window. | |
123 | If it is a frame, use the frame's selected window.") | |
124 | ||
ab1c7f35 | 125 | (defcustom server-temp-file-regexp "^/tmp/Re\\|/draft$" |
9ae0f972 | 126 | "*Regexp which should match filenames of temporary files |
127 | which are deleted and reused after each edit | |
c6a117f0 | 128 | by the programs that invoke the Emacs server." |
ab1c7f35 RS |
129 | :group 'server |
130 | :type 'regexp) | |
9ae0f972 | 131 | |
c6a117f0 GM |
132 | (defcustom server-kill-new-buffers t |
133 | "*Whether to kill buffers when done with them. | |
134 | If non-nil, kill a buffer unless it already existed before editing | |
135 | it with Emacs server. If nil, kill only buffers as specified by | |
136 | `server-temp-file-regexp'. | |
137 | Please note that only buffers are killed that still have a client, | |
138 | i.e. buffers visited which \"emacsclient --no-wait\" are never killed in | |
139 | this way." | |
140 | :group 'server | |
141 | :type 'boolean | |
142 | :version "21.1") | |
143 | ||
9ae0f972 | 144 | (or (assq 'server-buffer-clients minor-mode-alist) |
145 | (setq minor-mode-alist (cons '(server-buffer-clients " Server") minor-mode-alist))) | |
146 | ||
c6a117f0 | 147 | (defvar server-existing-buffer nil |
4dd04714 RS |
148 | "Non-nil means a buffer existed before the Emacs server was asked visit it. |
149 | This means that the server should not kill the buffer when you say you | |
150 | are done with it in the server. This variable is local in each buffer | |
151 | where it is set.") | |
c6a117f0 GM |
152 | (make-variable-buffer-local 'server-existing-buffer) |
153 | ||
9ae0f972 | 154 | ;; If a *server* buffer exists, |
155 | ;; write STRING to it for logging purposes. | |
156 | (defun server-log (string) | |
157 | (if (get-buffer "*server*") | |
158 | (save-excursion | |
159 | (set-buffer "*server*") | |
160 | (goto-char (point-max)) | |
74c20cd3 RS |
161 | (insert (current-time-string) " " string) |
162 | (or (bolp) (newline))))) | |
9ae0f972 | 163 | |
164 | (defun server-sentinel (proc msg) | |
165 | (cond ((eq (process-status proc) 'exit) | |
166 | (server-log (message "Server subprocess exited"))) | |
167 | ((eq (process-status proc) 'signal) | |
168 | (server-log (message "Server subprocess killed"))))) | |
169 | ||
7229064d | 170 | ;;;###autoload |
9ae0f972 | 171 | (defun server-start (&optional leave-dead) |
172 | "Allow this Emacs process to be a server for client processes. | |
173 | This starts a server communications subprocess through which | |
174 | client \"editors\" can send your editing commands to this Emacs job. | |
42bbacdf | 175 | To use the server, set up the program `emacsclient' in the |
9ae0f972 | 176 | Emacs distribution as your standard \"editor\". |
177 | ||
178 | Prefix arg means just kill any existing server communications subprocess." | |
179 | (interactive "P") | |
180 | ;; kill it dead! | |
181 | (if server-process | |
182 | (progn | |
183 | (set-process-sentinel server-process nil) | |
184 | (condition-case () (delete-process server-process) (error nil)))) | |
c1148e39 | 185 | ;; Delete the socket files made by previous server invocations. |
14f67fa6 RS |
186 | (let* ((sysname (system-name)) |
187 | (dot-index (string-match "\\." sysname))) | |
c1148e39 RS |
188 | (condition-case () |
189 | (delete-file (format "~/.emacs-server-%s" sysname)) | |
190 | (error nil)) | |
14f67fa6 RS |
191 | (condition-case () |
192 | (delete-file (format "/tmp/esrv%d-%s" (user-uid) sysname)) | |
193 | (error nil)) | |
194 | ;; In case the server file name was made with a domainless hostname, | |
195 | ;; try deleting that name too. | |
196 | (if dot-index | |
c1148e39 RS |
197 | (let ((shortname (substring sysname 0 dot-index))) |
198 | (condition-case () | |
199 | (delete-file (format "~/.emacs-server-%s" shortname)) | |
200 | (error nil)) | |
201 | (condition-case () | |
202 | (delete-file (format "/tmp/esrv%d-%s" (user-uid) shortname)) | |
203 | (error nil))))) | |
204 | ;; If this Emacs already had a server, clear out associated status. | |
9ae0f972 | 205 | (while server-clients |
206 | (let ((buffer (nth 1 (car server-clients)))) | |
207 | (server-buffer-done buffer))) | |
208 | (if leave-dead | |
209 | nil | |
210 | (if server-process | |
211 | (server-log (message "Restarting server"))) | |
838cd60d RS |
212 | ;; Using a pty is wasteful, and the separate session causes |
213 | ;; annoyance sometimes (some systems kill idle sessions). | |
214 | (let ((process-connection-type nil)) | |
215 | (setq server-process (start-process "server" nil server-program))) | |
9ae0f972 | 216 | (set-process-sentinel server-process 'server-sentinel) |
217 | (set-process-filter server-process 'server-process-filter) | |
6b7430a8 KH |
218 | ;; We must receive file names without being decoded. Those are |
219 | ;; decoded by server-process-filter accoding to | |
220 | ;; file-name-coding-system. | |
221 | (set-process-coding-system server-process 'raw-text 'raw-text) | |
9ae0f972 | 222 | (process-kill-without-query server-process))) |
223 | \f | |
224 | ;Process a request from the server to edit some files. | |
225 | ;Format of STRING is "Client: CLIENTID PATH PATH PATH... \n" | |
226 | (defun server-process-filter (proc string) | |
227 | (server-log string) | |
b53d289e | 228 | (setq string (concat server-previous-string string)) |
68469f74 RS |
229 | ;; If the input is multiple lines, |
230 | ;; process each line individually. | |
231 | (while (string-match "\n" string) | |
232 | (let ((request (substring string 0 (match-beginning 0))) | |
6b7430a8 KH |
233 | (coding-system (and default-enable-multibyte-characters |
234 | (or file-name-coding-system | |
235 | default-file-name-coding-system))) | |
dfa35e6b | 236 | client nowait |
9ae0f972 | 237 | (files nil) |
8c493570 GM |
238 | (lineno 1) |
239 | (columnno 0)) | |
68469f74 RS |
240 | ;; Remove this line from STRING. |
241 | (setq string (substring string (match-end 0))) | |
7e721a4f | 242 | (if (string-match "^Error: " request) |
26544100 | 243 | (message "Server error: %s" (substring request (match-end 0))) |
7e721a4f | 244 | (if (string-match "^Client: " request) |
77e5a3c7 RS |
245 | (progn |
246 | (setq request (substring request (match-end 0))) | |
247 | (setq client (list (substring request 0 (string-match " " request)))) | |
248 | (setq request (substring request (match-end 0))) | |
249 | (while (string-match "[^ ]+ " request) | |
250 | (let ((arg | |
8226e01e RS |
251 | (substring request (match-beginning 0) (1- (match-end 0)))) |
252 | (pos 0)) | |
77e5a3c7 | 253 | (setq request (substring request (match-end 0))) |
dfa35e6b RS |
254 | (if (string-match "\\`-nowait" arg) |
255 | (setq nowait t) | |
8c493570 GM |
256 | (cond |
257 | ;; ARG is a line number option. | |
258 | ((string-match "\\`\\+[0-9]+\\'" arg) | |
259 | (setq lineno (string-to-int (substring arg 1)))) | |
260 | ;; ARG is line number:column option. | |
261 | ((string-match "\\`+\\([0-9]+\\):\\([0-9]+\\)\\'" arg) | |
262 | (setq lineno (string-to-int (match-string 1 arg)) | |
263 | columnno (string-to-int (match-string 2 arg)))) | |
264 | (t | |
dfa35e6b RS |
265 | ;; ARG is a file name. |
266 | ;; Collapse multiple slashes to single slashes. | |
267 | (setq arg (command-line-normalize-file-name arg)) | |
349e3f82 RS |
268 | ;; Undo the quoting that emacsclient does |
269 | ;; for certain special characters. | |
b59a6343 | 270 | (while (string-match "&." arg pos) |
349e3f82 RS |
271 | (setq pos (1+ (match-beginning 0))) |
272 | (let ((nextchar (aref arg pos))) | |
b59a6343 RS |
273 | (cond ((= nextchar ?&) |
274 | (setq arg (replace-match "&" t t arg))) | |
349e3f82 RS |
275 | ((= nextchar ?-) |
276 | (setq arg (replace-match "-" t t arg))) | |
277 | (t | |
278 | (setq arg (replace-match " " t t arg)))))) | |
6b7430a8 KH |
279 | ;; Now decode the file name if necessary. |
280 | (if coding-system | |
281 | (setq arg (decode-coding-string arg coding-system))) | |
dfa35e6b | 282 | (setq files |
8c493570 | 283 | (cons (list arg lineno columnno) |
dfa35e6b | 284 | files)) |
8c493570 GM |
285 | (setq lineno 1) |
286 | (setq columnno 0)))))) | |
1cd04440 | 287 | (run-hooks 'pre-command-hook) |
dfa35e6b | 288 | (server-visit-files files client nowait) |
1cd04440 | 289 | (run-hooks 'post-command-hook) |
77e5a3c7 | 290 | ;; CLIENT is now a list (CLIENTNUM BUFFERS...) |
0c40a645 KH |
291 | (if (null (cdr client)) |
292 | ;; This client is empty; get rid of it immediately. | |
293 | (progn | |
294 | (send-string server-process | |
295 | (format "Close: %s Done\n" (car client))) | |
296 | (server-log (format "Close empty client: %s Done\n" (car client)))) | |
297 | ;; We visited some buffer for this client. | |
298 | (or nowait | |
299 | (setq server-clients (cons client server-clients))) | |
300 | (server-switch-buffer (nth 1 client)) | |
301 | (run-hooks 'server-switch-hook) | |
302 | (message (substitute-command-keys | |
303 | "When done with a buffer, type \\[server-edit]")))))))) | |
68469f74 RS |
304 | ;; Save for later any partial line that remains. |
305 | (setq server-previous-string string)) | |
9ae0f972 | 306 | |
dfa35e6b | 307 | (defun server-visit-files (files client &optional nowait) |
9ae0f972 | 308 | "Finds FILES and returns the list CLIENT with the buffers nconc'd. |
8c493570 | 309 | FILES is an alist whose elements are (FILENAME LINENUMBER COLUMNNUMBER). |
dfa35e6b RS |
310 | NOWAIT non-nil means this client is not waiting for the results, |
311 | so don't mark these buffers specially, just visit them normally." | |
e82e73c2 RS |
312 | ;; Bind last-nonmenu-event to force use of keyboard, not mouse, for queries. |
313 | (let (client-record (last-nonmenu-event t) (obuf (current-buffer))) | |
3a0ce849 RS |
314 | ;; Restore the current buffer afterward, but not using save-excursion, |
315 | ;; because we don't want to save point in this buffer | |
316 | ;; if it happens to be one of those specified by the server. | |
317 | (unwind-protect | |
318 | (while files | |
c6a117f0 GM |
319 | ;; If there is an existing buffer modified or the file is |
320 | ;; modified, revert it. If there is an existing buffer with | |
321 | ;; deleted file, offer to write it. | |
3a0ce849 RS |
322 | (let* ((filen (car (car files))) |
323 | (obuf (get-file-buffer filen))) | |
0f5f7c3e | 324 | (push filen file-name-history) |
3a0ce849 | 325 | (if (and obuf (set-buffer obuf)) |
92a6563f GM |
326 | (progn |
327 | (cond ((file-exists-p filen) | |
328 | (if (or (not (verify-visited-file-modtime obuf)) | |
329 | (buffer-modified-p obuf)) | |
330 | (revert-buffer t nil))) | |
331 | (t | |
332 | (if (y-or-n-p | |
333 | (concat "File no longer exists: " | |
334 | filen | |
335 | ", write buffer to file? ")) | |
336 | (write-file filen)))) | |
337 | (setq server-existing-buffer t) | |
338 | (goto-line (nth 1 (car files)))) | |
3a0ce849 | 339 | (set-buffer (find-file-noselect filen)) |
92a6563f | 340 | (goto-line (nth 1 (car files))) |
8c493570 GM |
341 | (let ((column-number (nth 2 (car files)))) |
342 | (when (> column-number 0) | |
05824718 | 343 | (move-to-column (1- column-number)))) |
3a0ce849 | 344 | (run-hooks 'server-visit-hook))) |
dfa35e6b RS |
345 | (if (not nowait) |
346 | (setq server-buffer-clients | |
347 | (cons (car client) server-buffer-clients))) | |
3a0ce849 RS |
348 | (setq client-record (cons (current-buffer) client-record)) |
349 | (setq files (cdr files))) | |
350 | (set-buffer obuf)) | |
9ae0f972 | 351 | (nconc client client-record))) |
352 | \f | |
b392bac9 | 353 | (defun server-buffer-done (buffer &optional for-killing) |
9ae0f972 | 354 | "Mark BUFFER as \"done\" for its client(s). |
9184aafb RS |
355 | This buries the buffer, then returns a list of the form (NEXT-BUFFER KILLED). |
356 | NEXT-BUFFER is another server buffer, as a suggestion for what to select next, | |
599f9a5c RS |
357 | or nil. KILLED is t if we killed BUFFER |
358 | \(typically, because it was visiting a temp file)." | |
9ae0f972 | 359 | (let ((running (eq (process-status server-process) 'run)) |
360 | (next-buffer nil) | |
9184aafb | 361 | (killed nil) |
08c22983 | 362 | (first t) |
9ae0f972 | 363 | (old-clients server-clients)) |
364 | (while old-clients | |
365 | (let ((client (car old-clients))) | |
366 | (or next-buffer | |
367 | (setq next-buffer (nth 1 (memq buffer client)))) | |
368 | (delq buffer client) | |
68469f74 RS |
369 | ;; Delete all dead buffers from CLIENT. |
370 | (let ((tail client)) | |
371 | (while tail | |
372 | (and (bufferp (car tail)) | |
373 | (null (buffer-name (car tail))) | |
374 | (delq (car tail) client)) | |
375 | (setq tail (cdr tail)))) | |
9ae0f972 | 376 | ;; If client now has no pending buffers, |
377 | ;; tell it that it is done, and forget it entirely. | |
378 | (if (cdr client) nil | |
379 | (if running | |
380 | (progn | |
68469f74 RS |
381 | ;; Don't send emacsserver two commands in close succession. |
382 | ;; It cannot handle that. | |
08c22983 RS |
383 | (or first (sit-for 1)) |
384 | (setq first nil) | |
385 | (send-string server-process | |
386 | (format "Close: %s Done\n" (car client))) | |
387 | (server-log (format "Close: %s Done\n" (car client))))) | |
9ae0f972 | 388 | (setq server-clients (delq client server-clients)))) |
389 | (setq old-clients (cdr old-clients))) | |
68469f74 | 390 | (if (and (bufferp buffer) (buffer-name buffer)) |
599f9a5c RS |
391 | ;; We may or may not kill this buffer; |
392 | ;; if we do, do not call server-buffer-done recursively | |
393 | ;; from kill-buffer-hook. | |
394 | (let ((server-kill-buffer-running t)) | |
faf931a8 RS |
395 | (save-excursion |
396 | (set-buffer buffer) | |
f9b3ef88 RS |
397 | (setq server-buffer-clients nil) |
398 | (run-hooks 'server-done-hook)) | |
599f9a5c RS |
399 | ;; Notice whether server-done-hook killed the buffer. |
400 | (if (null (buffer-name buffer)) | |
401 | (setq killed t) | |
402 | ;; Don't bother killing or burying the buffer | |
403 | ;; when we are called from kill-buffer. | |
404 | (unless for-killing | |
c6a117f0 GM |
405 | (when (and (not killed) |
406 | server-kill-new-buffers | |
4dd04714 RS |
407 | (with-current-buffer buffer |
408 | (not server-existing-buffer))) | |
c6a117f0 | 409 | (setq killed t) |
3d2a0e0b | 410 | (bury-buffer buffer) |
c6a117f0 GM |
411 | (kill-buffer buffer)) |
412 | (unless killed | |
413 | (if (server-temp-file-p buffer) | |
414 | (progn | |
415 | (kill-buffer buffer) | |
416 | (setq killed t)) | |
417 | (bury-buffer buffer))))))) | |
9184aafb | 418 | (list next-buffer killed))) |
9ae0f972 | 419 | |
420 | (defun server-temp-file-p (buffer) | |
421 | "Return non-nil if BUFFER contains a file considered temporary. | |
422 | These are files whose names suggest they are repeatedly | |
423 | reused to pass information to another program. | |
424 | ||
425 | The variable `server-temp-file-regexp' controls which filenames | |
426 | are considered temporary." | |
427 | (and (buffer-file-name buffer) | |
428 | (string-match server-temp-file-regexp (buffer-file-name buffer)))) | |
429 | ||
430 | (defun server-done () | |
cc9875f9 | 431 | "Offer to save current buffer, mark it as \"done\" for clients. |
ed9ae328 RS |
432 | This kills or buries the buffer, then returns a list |
433 | of the form (NEXT-BUFFER KILLED). NEXT-BUFFER is another server buffer, | |
434 | as a suggestion for what to select next, or nil. | |
435 | KILLED is t if we killed BUFFER, which happens if it was created | |
436 | specifically for the clients and did not exist before their request for it." | |
9ae0f972 | 437 | (let ((buffer (current-buffer))) |
438 | (if server-buffer-clients | |
c58bf9ae | 439 | (progn |
9ae0f972 | 440 | (if (server-temp-file-p buffer) |
991298c3 RS |
441 | ;; For a temp file, save, and do make a non-numeric backup |
442 | ;; (unless make-backup-files is nil). | |
443 | (let ((version-control nil) | |
444 | (buffer-backed-up nil)) | |
c58bf9ae | 445 | (save-buffer)) |
9ae0f972 | 446 | (if (and (buffer-modified-p) |
ffdd2796 | 447 | buffer-file-name |
9ae0f972 | 448 | (y-or-n-p (concat "Save file " buffer-file-name "? "))) |
449 | (save-buffer buffer))) | |
c58bf9ae | 450 | (server-buffer-done buffer))))) |
faf931a8 | 451 | |
71207de2 RS |
452 | ;; Ask before killing a server buffer. |
453 | ;; It was suggested to release its client instead, | |
454 | ;; but I think that is dangerous--the client would proceed | |
455 | ;; using whatever is on disk in that file. -- rms. | |
03d78665 RS |
456 | (defun server-kill-buffer-query-function () |
457 | (or (not server-buffer-clients) | |
458 | (yes-or-no-p (format "Buffer `%s' still has clients; kill it? " | |
459 | (buffer-name (current-buffer)))))) | |
460 | ||
faf931a8 | 461 | (add-hook 'kill-buffer-query-functions |
03d78665 RS |
462 | 'server-kill-buffer-query-function) |
463 | ||
464 | (defun server-kill-emacs-query-function () | |
e82e73c2 RS |
465 | (let (live-client |
466 | (tail server-clients)) | |
467 | ;; See if any clients have any buffers that are still alive. | |
468 | (while tail | |
469 | (if (memq t (mapcar 'stringp (mapcar 'buffer-name (cdr (car tail))))) | |
470 | (setq live-client t)) | |
471 | (setq tail (cdr tail))) | |
472 | (or (not live-client) | |
473 | (yes-or-no-p "Server buffers still have clients; exit anyway? ")))) | |
03d78665 RS |
474 | |
475 | (add-hook 'kill-emacs-query-functions 'server-kill-emacs-query-function) | |
b392bac9 | 476 | |
fb873cfc | 477 | (defvar server-kill-buffer-running nil |
599f9a5c | 478 | "Non-nil while `server-kill-buffer' or `server-buffer-done' is running.") |
fb873cfc | 479 | |
b392bac9 RS |
480 | ;; When a buffer is killed, inform the clients. |
481 | (add-hook 'kill-buffer-hook 'server-kill-buffer) | |
482 | (defun server-kill-buffer () | |
fb873cfc RS |
483 | ;; Prevent infinite recursion if user has made server-done-hook |
484 | ;; call kill-buffer. | |
485 | (or server-kill-buffer-running | |
599f9a5c RS |
486 | (and server-buffer-clients |
487 | (let ((server-kill-buffer-running t)) | |
488 | (when server-process | |
489 | (server-buffer-done (current-buffer) t)))))) | |
9ae0f972 | 490 | \f |
491 | (defun server-edit (&optional arg) | |
492 | "Switch to next server editing buffer; say \"Done\" for current buffer. | |
493 | If a server buffer is current, it is marked \"done\" and optionally saved. | |
ed9ae328 | 494 | The buffer is also killed if it did not exist before the clients asked for it. |
9ae0f972 | 495 | When all of a client's buffers are marked as \"done\", the client is notified. |
496 | ||
497 | Temporary files such as MH <draft> files are always saved and backed up, | |
991298c3 RS |
498 | no questions asked. (The variable `make-backup-files', if nil, still |
499 | inhibits a backup; you can set it locally in a particular buffer to | |
500 | prevent a backup for it.) The variable `server-temp-file-regexp' controls | |
9ae0f972 | 501 | which filenames are considered temporary. |
502 | ||
503 | If invoked with a prefix argument, or if there is no server process running, | |
504 | starts server process and that is all. Invoked by \\[server-edit]." | |
9ae0f972 | 505 | (interactive "P") |
506 | (if (or arg | |
507 | (not server-process) | |
508 | (memq (process-status server-process) '(signal exit))) | |
509 | (server-start nil) | |
9184aafb | 510 | (apply 'server-switch-buffer (server-done)))) |
9ae0f972 | 511 | |
98a4349c | 512 | (defun server-switch-buffer (&optional next-buffer killed-one) |
9ae0f972 | 513 | "Switch to another buffer, preferably one that has a client. |
514 | Arg NEXT-BUFFER is a suggestion; if it is a live buffer, use it." | |
9184aafb RS |
515 | ;; KILLED-ONE is t in a recursive call |
516 | ;; if we have already killed one temp-file server buffer. | |
517 | ;; This means we should avoid the final "switch to some other buffer" | |
518 | ;; since we've already effectively done that. | |
396e0e6a RS |
519 | (cond ((and (windowp server-window) |
520 | (window-live-p server-window)) | |
ec40ed9f RS |
521 | (select-window server-window)) |
522 | ((framep server-window) | |
396e0e6a RS |
523 | (if (not (frame-live-p server-window)) |
524 | (setq server-window (make-frame))) | |
ec40ed9f | 525 | (select-window (frame-selected-window server-window)))) |
e5ccf0c1 | 526 | (if (window-minibuffer-p (selected-window)) |
02a8d137 RS |
527 | (select-window (next-window nil 'nomini 0))) |
528 | ;; Move to a non-dedicated window, if we have one. | |
39b557e8 | 529 | (when (window-dedicated-p (selected-window)) |
35f01a95 GM |
530 | (select-window (get-window-with-predicate |
531 | (lambda (w) (not (window-dedicated-p w))) | |
532 | 'nomini 'visible (selected-window)))) | |
02a8d137 | 533 | (set-window-dedicated-p (selected-window) nil) |
9ae0f972 | 534 | (if next-buffer |
535 | (if (and (bufferp next-buffer) | |
536 | (buffer-name next-buffer)) | |
537 | (switch-to-buffer next-buffer) | |
538 | ;; If NEXT-BUFFER is a dead buffer, | |
539 | ;; remove the server records for it | |
540 | ;; and try the next surviving server buffer. | |
9184aafb RS |
541 | (apply 'server-switch-buffer |
542 | (server-buffer-done next-buffer))) | |
9ae0f972 | 543 | (if server-clients |
9184aafb RS |
544 | (server-switch-buffer (nth 1 (car server-clients)) killed-one) |
545 | (if (not killed-one) | |
546 | (switch-to-buffer (other-buffer)))))) | |
9ae0f972 | 547 | |
548 | (global-set-key "\C-x#" 'server-edit) | |
16c15321 RM |
549 | \f |
550 | (provide 'server) | |
c88ab9ce ER |
551 | |
552 | ;;; server.el ends here |