;;; server.el --- Lisp code for GNU Emacs running as server process.
-;; Copyright (C) 1986, 1987, 1992, 1994, 1995 Free Software Foundation, Inc.
+;; Copyright (C) 1986, 87, 92, 94, 95, 96, 1997 Free Software Foundation, Inc.
;; Author: William Sommerfeld <wesommer@athena.mit.edu>
+;; Maintainer: FSF
;; Keywords: processes
;; Changes by peck@sun.com and by rms.
;;; Code:
\f
-(defvar server-program (expand-file-name "emacsserver" exec-directory)
- "*The program to use as the edit server.")
-
-(defvar server-visit-hook nil
- "*List of hooks to call when visiting a file for the Emacs server.")
-
-(defvar server-switch-hook nil
- "*List of hooks to call when switching to a buffer for the Emacs server.")
-
-(defvar server-done-hook nil
- "*List of hooks to call when done editing a buffer for the Emacs server.")
+(defgroup server nil
+ "Emacs running as a server process."
+ :group 'external)
+
+(defcustom server-program (expand-file-name "emacsserver" exec-directory)
+ "*The program to use as the edit server."
+ :group 'server
+ :type 'string)
+
+(defcustom server-visit-hook nil
+ "*List of hooks to call when visiting a file for the Emacs server."
+ :group 'server
+ :type '(repeat function))
+
+(defcustom server-switch-hook nil
+ "*List of hooks to call when switching to a buffer for the Emacs server."
+ :group 'server
+ :type '(repeat function))
+
+(defcustom server-done-hook nil
+ "*List of hooks to call when done editing a buffer for the Emacs server."
+ :group 'server
+ :type '(repeat function))
(defvar server-process nil
"the current server process")
If nil, use the selected window.
If it is a frame, use the frame's selected window.")
-(defvar server-temp-file-regexp "^/tmp/Re\\|/draft$"
+(defcustom server-temp-file-regexp "^/tmp/Re\\|/draft$"
"*Regexp which should match filenames of temporary files
which are deleted and reused after each edit
-by the programs that invoke the emacs server.")
+by the programs that invoke the emacs server."
+ :group 'server
+ :type 'regexp)
(or (assq 'server-buffer-clients minor-mode-alist)
(setq minor-mode-alist (cons '(server-buffer-clients " Server") minor-mode-alist)))
(setq server-process (start-process "server" nil server-program)))
(set-process-sentinel server-process 'server-sentinel)
(set-process-filter server-process 'server-process-filter)
+ ;; We must receive file names without being decoded. Those are
+ ;; decoded by server-process-filter accoding to
+ ;; file-name-coding-system.
+ (set-process-coding-system server-process 'raw-text 'raw-text)
(process-kill-without-query server-process)))
\f
;Process a request from the server to edit some files.
;; process each line individually.
(while (string-match "\n" string)
(let ((request (substring string 0 (match-beginning 0)))
+ (coding-system (and default-enable-multibyte-characters
+ (or file-name-coding-system
+ default-file-name-coding-system)))
client nowait
(files nil)
(lineno 1))
(setq arg (replace-match "-" t t arg)))
(t
(setq arg (replace-match " " t t arg))))))
+ ;; Now decode the file name if necessary.
+ (if coding-system
+ (setq arg (decode-coding-string arg coding-system)))
(setq files
(cons (list arg lineno)
files))
(setq lineno 1)))))
(server-visit-files files client nowait)
;; CLIENT is now a list (CLIENTNUM BUFFERS...)
- (or nowait
- (setq server-clients (cons client server-clients)))
- (server-switch-buffer (nth 1 client))
- (run-hooks 'server-switch-hook)
- (message (substitute-command-keys
- "When done with a buffer, type \\[server-edit]")))))))
+ (if (null (cdr client))
+ ;; This client is empty; get rid of it immediately.
+ (progn
+ (send-string server-process
+ (format "Close: %s Done\n" (car client)))
+ (server-log (format "Close empty client: %s Done\n" (car client))))
+ ;; We visited some buffer for this client.
+ (or nowait
+ (setq server-clients (cons client server-clients)))
+ (server-switch-buffer (nth 1 client))
+ (run-hooks 'server-switch-hook)
+ (message (substitute-command-keys
+ "When done with a buffer, type \\[server-edit]"))))))))
;; Save for later any partial line that remains.
(setq server-previous-string string))
"Mark BUFFER as \"done\" for its client(s).
This buries the buffer, then returns a list of the form (NEXT-BUFFER KILLED).
NEXT-BUFFER is another server buffer, as a suggestion for what to select next,
-or nil. KILLED is t if we killed BUFFER (because it was a temp file)."
+or nil. KILLED is t if we killed BUFFER
+\(typically, because it was visiting a temp file)."
(let ((running (eq (process-status server-process) 'run))
(next-buffer nil)
(killed nil)
(setq server-clients (delq client server-clients))))
(setq old-clients (cdr old-clients)))
(if (and (bufferp buffer) (buffer-name buffer))
- (progn
+ ;; We may or may not kill this buffer;
+ ;; if we do, do not call server-buffer-done recursively
+ ;; from kill-buffer-hook.
+ (let ((server-kill-buffer-running t))
(save-excursion
(set-buffer buffer)
(setq server-buffer-clients nil)
(run-hooks 'server-done-hook))
- (if for-killing
+ ;; Notice whether server-done-hook killed the buffer.
+ (if (null (buffer-name buffer))
+ (setq killed t)
+ ;; Don't bother killing or burying the buffer
+ ;; when we are called from kill-buffer.
+ (unless for-killing
(if (server-temp-file-p buffer)
(progn (kill-buffer buffer)
(setq killed t))
- (bury-buffer buffer)))))
+ (bury-buffer buffer))))))
(list next-buffer killed)))
(defun server-temp-file-p (buffer)
"Offer to save current buffer, mark it as \"done\" for clients.
This buries the buffer, then returns a list of the form (NEXT-BUFFER KILLED).
NEXT-BUFFER is another server buffer, as a suggestion for what to select next,
-or nil. KILLED is t if we killed the BUFFER (because it was a temp file)."
+or nil. KILLED is t if we killed BUFFER
+\(typically, because it was visiting a temp file)."
(let ((buffer (current-buffer)))
(if server-buffer-clients
(progn
(add-hook 'kill-emacs-query-functions 'server-kill-emacs-query-function)
+(defvar server-kill-buffer-running nil
+ "Non-nil while `server-kill-buffer' or `server-buffer-done' is running.")
+
;; When a buffer is killed, inform the clients.
(add-hook 'kill-buffer-hook 'server-kill-buffer)
(defun server-kill-buffer ()
- (when server-process
- (server-buffer-done (current-buffer) t)))
+ ;; Prevent infinite recursion if user has made server-done-hook
+ ;; call kill-buffer.
+ (or server-kill-buffer-running
+ (and server-buffer-clients
+ (let ((server-kill-buffer-running t))
+ (when server-process
+ (server-buffer-done (current-buffer) t))))))
\f
(defun server-edit (&optional arg)
"Switch to next server editing buffer; say \"Done\" for current buffer.