2001-07-15 16:15:35 +00:00
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;;; server.el --- Lisp code for GNU Emacs running as server process
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1992-05-30 21:11:25 +00:00
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2004-01-27 23:08:29 +00:00
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;; Copyright (C) 1986,87,92,94,95,96,97,98,99,2000,01,02,03,2004
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2000-12-07 13:53:21 +00:00
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;; Free Software Foundation, Inc.
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1992-07-22 03:58:44 +00:00
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1992-07-15 21:31:44 +00:00
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;; Author: William Sommerfeld <wesommer@athena.mit.edu>
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1997-05-27 15:32:03 +00:00
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;; Maintainer: FSF
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1992-07-17 20:24:00 +00:00
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;; Keywords: processes
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1992-07-15 21:31:44 +00:00
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1990-02-22 10:44:55 +00:00
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;; Changes by peck@sun.com and by rms.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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1992-07-16 21:47:34 +00:00
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;; the Free Software Foundation; either version 2, or (at your option)
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1990-02-22 10:44:55 +00:00
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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1996-01-14 07:34:30 +00:00
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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2005-07-04 23:32:44 +00:00
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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1990-02-22 10:44:55 +00:00
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1992-07-15 21:31:44 +00:00
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;;; Commentary:
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1990-02-22 10:44:55 +00:00
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1996-01-14 07:34:30 +00:00
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;; This Lisp code is run in Emacs when it is to operate as
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;; a server for other processes.
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1990-02-22 10:44:55 +00:00
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1996-01-14 07:34:30 +00:00
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;; Load this library and do M-x server-edit to enable Emacs as a server.
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2002-09-27 17:43:29 +00:00
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;; Emacs opens up a socket for communication with clients. If there are no
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;; client buffers to edit, server-edit acts like (switch-to-buffer
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;; (other-buffer))
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1990-02-22 10:44:55 +00:00
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1996-01-14 07:34:30 +00:00
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;; When some other program runs "the editor" to edit a file,
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;; "the editor" can be the Emacs client program ../lib-src/emacsclient.
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;; This program transmits the file names to Emacs through
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;; the server subprocess, and Emacs visits them and lets you edit them.
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1990-02-22 10:44:55 +00:00
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1996-01-14 07:34:30 +00:00
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;; Note that any number of clients may dispatch files to emacs to be edited.
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1990-02-22 10:44:55 +00:00
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1996-01-14 07:34:30 +00:00
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;; When you finish editing a Server buffer, again call server-edit
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2003-01-13 16:44:07 +00:00
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;; to mark that buffer as done for the client and switch to the next
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;; Server buffer. When all the buffers for a client have been edited
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1996-01-14 07:34:30 +00:00
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;; and exited with server-edit, the client "editor" will return
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2003-01-13 16:44:07 +00:00
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;; to the program that invoked it.
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1990-02-22 10:44:55 +00:00
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1996-01-14 07:34:30 +00:00
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;; Your editing commands and Emacs's display output go to and from
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;; the terminal in the usual way. Thus, server operation is possible
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;; only when Emacs can talk to the terminal at the time you invoke
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;; the client. This is possible in four cases:
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1990-02-22 10:44:55 +00:00
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1996-01-14 07:34:30 +00:00
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;; 1. On a window system, where Emacs runs in one window and the
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;; program that wants to use "the editor" runs in another.
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1990-02-22 10:44:55 +00:00
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1996-01-14 07:34:30 +00:00
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;; 2. On a multi-terminal system, where Emacs runs on one terminal and the
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;; program that wants to use "the editor" runs on another.
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1990-02-22 10:44:55 +00:00
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1996-01-14 07:34:30 +00:00
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;; 3. When the program that wants to use "the editor" is running
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;; as a subprocess of Emacs.
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1990-02-22 10:44:55 +00:00
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1996-01-14 07:34:30 +00:00
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;; 4. On a system with job control, when Emacs is suspended, the program
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;; that wants to use "the editor" will stop and display
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;; "Waiting for Emacs...". It can then be suspended, and Emacs can be
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;; brought into the foreground for editing. When done editing, Emacs is
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;; suspended again, and the client program is brought into the foreground.
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1990-02-22 10:44:55 +00:00
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2003-01-13 16:44:07 +00:00
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;; The buffer local variable "server-buffer-clients" lists
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;; the clients who are waiting for this buffer to be edited.
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1996-01-14 07:34:30 +00:00
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;; The global variable "server-clients" lists all the waiting clients,
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;; and which files are yet to be edited for each.
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1992-07-15 21:31:44 +00:00
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;;; Code:
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2002-09-18 02:10:18 +00:00
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(eval-when-compile (require 'cl))
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1997-08-18 20:01:25 +00:00
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(defgroup server nil
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"Emacs running as a server process."
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:group 'external)
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(defcustom server-visit-hook nil
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2002-09-25 19:54:13 +00:00
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"*Hook run when visiting a file for the Emacs server."
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1997-08-18 20:01:25 +00:00
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:group 'server
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2002-09-25 19:54:13 +00:00
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:type 'hook)
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1997-08-18 20:01:25 +00:00
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(defcustom server-switch-hook nil
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2002-09-25 19:54:13 +00:00
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"*Hook run when switching to a buffer for the Emacs server."
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1997-08-18 20:01:25 +00:00
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:group 'server
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2002-09-25 19:54:13 +00:00
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:type 'hook)
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1997-08-18 20:01:25 +00:00
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(defcustom server-done-hook nil
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2002-09-25 19:54:13 +00:00
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"*Hook run when done editing a buffer for the Emacs server."
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1997-08-18 20:01:25 +00:00
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:group 'server
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2002-09-25 19:54:13 +00:00
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:type 'hook)
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1994-05-20 23:48:12 +00:00
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2003-01-13 16:44:07 +00:00
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(defvar server-process nil
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"The current server process.")
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1990-02-22 10:44:55 +00:00
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(defvar server-clients nil
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"List of current server clients.
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1994-05-28 17:22:31 +00:00
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Each element is (CLIENTID BUFFERS...) where CLIENTID is a string
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1990-02-22 10:44:55 +00:00
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that can be given to the server process to identify a client.
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When a buffer is marked as \"done\", it is removed from this list.")
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(defvar server-buffer-clients nil
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2001-06-10 08:45:41 +00:00
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"List of client ids for clients requesting editing of current buffer.")
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1994-03-03 19:23:59 +00:00
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(make-variable-buffer-local 'server-buffer-clients)
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1990-02-22 10:44:55 +00:00
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;; Changing major modes should not erase this local.
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(put 'server-buffer-clients 'permanent-local t)
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2003-01-15 17:49:32 +00:00
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(defcustom server-window nil
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"*Specification of the window to use for selecting Emacs server buffers.
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1993-06-11 18:28:44 +00:00
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If nil, use the selected window.
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2002-11-02 05:29:13 +00:00
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If it is a function, it should take one argument (a buffer) and
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2003-01-15 17:49:32 +00:00
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display and select it. A common value is `pop-to-buffer'.
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If it is a window, use that.
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If it is a frame, use the frame's selected window.
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It is not meaningful to set this to a specific frame or window with Custom.
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Only programs can do so."
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:group 'server
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2005-02-09 15:50:47 +00:00
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:version "22.1"
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2003-01-15 17:49:32 +00:00
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:type '(choice (const :tag "Use selected window"
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:match (lambda (widget value)
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(not (functionp value)))
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nil)
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(function-item :tag "Use pop-to-buffer" pop-to-buffer)
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(function :tag "Other function")))
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1993-06-11 18:28:44 +00:00
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1997-08-18 20:01:25 +00:00
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(defcustom server-temp-file-regexp "^/tmp/Re\\|/draft$"
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2003-01-15 17:49:32 +00:00
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"*Regexp matching names of temporary files.
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These are deleted and reused after each edit by the programs that
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invoke the Emacs server."
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1997-08-18 20:01:25 +00:00
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:group 'server
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:type 'regexp)
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1990-02-22 10:44:55 +00:00
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2000-08-21 15:26:01 +00:00
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(defcustom server-kill-new-buffers t
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"*Whether to kill buffers when done with them.
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If non-nil, kill a buffer unless it already existed before editing
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2003-01-13 16:44:07 +00:00
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it with Emacs server. If nil, kill only buffers as specified by
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2000-08-21 15:26:01 +00:00
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`server-temp-file-regexp'.
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Please note that only buffers are killed that still have a client,
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i.e. buffers visited which \"emacsclient --no-wait\" are never killed in
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this way."
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:group 'server
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:type 'boolean
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:version "21.1")
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1990-02-22 10:44:55 +00:00
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(or (assq 'server-buffer-clients minor-mode-alist)
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(setq minor-mode-alist (cons '(server-buffer-clients " Server") minor-mode-alist)))
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2000-08-21 15:26:01 +00:00
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(defvar server-existing-buffer nil
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2002-09-18 12:19:57 +00:00
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"Non-nil means the buffer existed before the server was asked to visit it.
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2001-11-11 17:56:23 +00:00
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This means that the server should not kill the buffer when you say you
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2002-09-18 12:19:57 +00:00
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are done with it in the server.")
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2000-08-21 15:26:01 +00:00
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(make-variable-buffer-local 'server-existing-buffer)
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2004-03-11 18:35:20 +00:00
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(defvar server-name "server")
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(defvar server-socket-dir
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(format "/tmp/emacs%d" (user-uid)))
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2002-09-25 19:54:13 +00:00
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2002-09-18 02:10:18 +00:00
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(defun server-log (string &optional client)
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2003-01-15 17:49:32 +00:00
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"If a *server* buffer exists, write STRING to it for logging purposes."
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1990-02-22 10:44:55 +00:00
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(if (get-buffer "*server*")
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2002-09-18 02:10:18 +00:00
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(with-current-buffer "*server*"
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1990-02-22 10:44:55 +00:00
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(goto-char (point-max))
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2002-09-18 02:10:18 +00:00
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(insert (current-time-string)
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2002-09-25 19:54:13 +00:00
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(if client (format " %s:" client) " ")
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2002-09-18 02:10:18 +00:00
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string)
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1995-11-10 17:01:59 +00:00
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(or (bolp) (newline)))))
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1990-02-22 10:44:55 +00:00
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(defun server-sentinel (proc msg)
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2002-11-02 05:29:13 +00:00
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(let ((client (assq proc server-clients)))
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2002-09-25 19:54:13 +00:00
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;; Remove PROC from the list of clients.
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2002-11-02 05:29:13 +00:00
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(when client
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(setq server-clients (delq client server-clients))
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(dolist (buf (cdr client))
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(with-current-buffer buf
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;; Remove PROC from the clients of each buffer.
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(setq server-buffer-clients (delq proc server-buffer-clients))
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;; Kill the buffer if necessary.
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(when (and (null server-buffer-clients)
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(or (and server-kill-new-buffers
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(not server-existing-buffer))
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(server-temp-file-p)))
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(kill-buffer (current-buffer)))))))
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2002-09-25 19:54:13 +00:00
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(server-log (format "Status changed to %s" (process-status proc)) proc))
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2002-09-27 17:43:29 +00:00
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(defun server-select-display (display)
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;; If the current frame is on `display' we're all set.
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(unless (equal (frame-parameter (selected-frame) 'display) display)
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;; Otherwise, look for an existing frame there and select it.
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(dolist (frame (frame-list))
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(when (equal (frame-parameter frame 'display) display)
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(select-frame frame)))
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;; If there's no frame on that display yet, create a dummy one
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;; and select it.
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(unless (equal (frame-parameter (selected-frame) 'display) display)
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(select-frame
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(make-frame-on-display
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display
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;; This frame is only there in place of an actual "current display"
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;; setting, so we want it to be as unobtrusive as possible. That's
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;; what the invisibility is for. The minibuffer setting is so that
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;; we don't end up displaying a buffer in it (which noone would
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;; notice).
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'((visibility . nil) (minibuffer . only)))))))
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2002-09-25 19:54:13 +00:00
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(defun server-unquote-arg (arg)
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(replace-regexp-in-string
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"&." (lambda (s)
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(case (aref s 1)
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(?& "&")
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(?- "-")
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(?n "\n")
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(t " ")))
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arg t t))
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1990-02-22 10:44:55 +00:00
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2003-04-12 19:04:11 +00:00
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(defun server-ensure-safe-dir (dir)
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"Make sure DIR is a directory with no race-condition issues.
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Creates the directory if necessary and makes sure:
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- there's no symlink involved
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- it's owned by us
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- it's not readable/writable by anybody else."
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(setq dir (directory-file-name dir))
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(let ((attrs (file-attributes dir)))
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(unless attrs
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(letf (((default-file-modes) ?\700)) (make-directory dir))
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(setq attrs (file-attributes dir)))
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;; Check that it's safe for use.
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(unless (and (eq t (car attrs)) (eq (nth 2 attrs) (user-uid))
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(zerop (logand ?\077 (file-modes dir))))
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(error "The directory %s is unsafe" dir))))
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1991-05-09 21:50:34 +00:00
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;;;###autoload
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1990-02-22 10:44:55 +00:00
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(defun server-start (&optional leave-dead)
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"Allow this Emacs process to be a server for client processes.
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This starts a server communications subprocess through which
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client \"editors\" can send your editing commands to this Emacs job.
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1994-06-11 20:18:46 +00:00
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To use the server, set up the program `emacsclient' in the
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1990-02-22 10:44:55 +00:00
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Emacs distribution as your standard \"editor\".
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Prefix arg means just kill any existing server communications subprocess."
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(interactive "P")
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2003-04-12 19:04:11 +00:00
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;; Make sure there is a safe directory in which to place the socket.
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2004-03-11 18:35:20 +00:00
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(server-ensure-safe-dir server-socket-dir)
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1990-02-22 10:44:55 +00:00
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;; kill it dead!
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2003-07-25 12:16:18 +00:00
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(if server-process
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(condition-case () (delete-process server-process) (error nil)))
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1996-12-30 20:40:27 +00:00
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;; Delete the socket files made by previous server invocations.
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2004-03-11 18:35:20 +00:00
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(condition-case ()
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(delete-file (expand-file-name server-name server-socket-dir))
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(error nil))
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1996-12-30 20:40:27 +00:00
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;; If this Emacs already had a server, clear out associated status.
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1990-02-22 10:44:55 +00:00
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(while server-clients
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(let ((buffer (nth 1 (car server-clients))))
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(server-buffer-done buffer)))
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2002-09-18 02:10:18 +00:00
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(unless leave-dead
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1990-02-22 10:44:55 +00:00
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(if server-process
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(server-log (message "Restarting server")))
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2003-04-12 19:05:41 +00:00
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(letf (((default-file-modes) ?\700))
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(setq server-process
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(make-network-process
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:name "server" :family 'local :server t :noquery t
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2004-03-11 18:35:20 +00:00
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:service (expand-file-name server-name server-socket-dir)
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2003-04-12 19:05:41 +00:00
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:sentinel 'server-sentinel :filter 'server-process-filter
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;; We must receive file names without being decoded.
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;; Those are decoded by server-process-filter according
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;; to file-name-coding-system.
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:coding 'raw-text)))))
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2003-01-15 17:49:32 +00:00
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;;;###autoload
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(define-minor-mode server-mode
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"Toggle Server mode.
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With ARG, turn Server mode on if ARG is positive, off otherwise.
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Server mode runs a process that accepts commands from the
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`emacsclient' program. See `server-start' and Info node `Emacs server'."
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:global t
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:group 'server
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2005-02-09 15:50:47 +00:00
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:version "22.1"
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2003-01-15 17:49:32 +00:00
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;; Fixme: Should this check for an existing server socket and do
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;; nothing if there is one (for multiple Emacs sessions)?
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(server-start (not server-mode)))
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1990-02-22 10:44:55 +00:00
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(defun server-process-filter (proc string)
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2003-01-15 17:49:32 +00:00
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"Process a request from the server to edit some files.
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PROC is the server process. Format of STRING is \"PATH PATH PATH... \\n\"."
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2002-09-25 19:54:13 +00:00
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(server-log string proc)
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2003-02-10 21:44:24 +00:00
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(let ((prev (process-get proc 'previous-string)))
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(when prev
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(setq string (concat prev string))
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(process-put proc 'previous-string nil)))
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1994-12-29 01:43:50 +00:00
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;; If the input is multiple lines,
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;; process each line individually.
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(while (string-match "\n" string)
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(let ((request (substring string 0 (match-beginning 0)))
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1999-03-13 00:21:24 +00:00
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(coding-system (and default-enable-multibyte-characters
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(or file-name-coding-system
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default-file-name-coding-system)))
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2002-09-27 17:43:29 +00:00
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client nowait eval
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1990-02-22 10:44:55 +00:00
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(files nil)
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2001-07-17 10:55:28 +00:00
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(lineno 1)
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2004-03-19 00:50:48 +00:00
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(tmp-frame nil) ; Sometimes used to embody the selected display.
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2001-07-17 10:55:28 +00:00
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(columnno 0))
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1994-12-29 01:43:50 +00:00
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;; Remove this line from STRING.
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2002-09-25 19:54:13 +00:00
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(setq string (substring string (match-end 0)))
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(setq client (cons proc nil))
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(while (string-match "[^ ]* " request)
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2003-04-12 19:04:11 +00:00
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(let ((arg (substring request (match-beginning 0) (1- (match-end 0)))))
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2002-09-25 19:54:13 +00:00
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(setq request (substring request (match-end 0)))
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(cond
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((equal "-nowait" arg) (setq nowait t))
|
2003-04-12 19:04:11 +00:00
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((equal "-eval" arg) (setq eval t))
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2002-09-27 17:43:29 +00:00
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((and (equal "-display" arg) (string-match "\\([^ ]*\\) " request))
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(let ((display (server-unquote-arg (match-string 1 request))))
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(setq request (substring request (match-end 0)))
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(condition-case err
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2004-03-19 00:50:48 +00:00
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(setq tmp-frame (server-select-display display))
|
2002-09-27 17:43:29 +00:00
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(error (process-send-string proc (nth 1 err))
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(setq request "")))))
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2002-09-25 19:54:13 +00:00
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;; ARG is a line number option.
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((string-match "\\`\\+[0-9]+\\'" arg)
|
2005-05-16 11:34:49 +00:00
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(setq lineno (string-to-number (substring arg 1))))
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2002-09-25 19:54:13 +00:00
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;; ARG is line number:column option.
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((string-match "\\`+\\([0-9]+\\):\\([0-9]+\\)\\'" arg)
|
2005-05-16 11:34:49 +00:00
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(setq lineno (string-to-number (match-string 1 arg))
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columnno (string-to-number (match-string 2 arg))))
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2002-09-25 19:54:13 +00:00
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(t
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;; Undo the quoting that emacsclient does
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;; for certain special characters.
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(setq arg (server-unquote-arg arg))
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;; Now decode the file name if necessary.
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(if coding-system
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(setq arg (decode-coding-string arg coding-system)))
|
2002-09-27 17:43:29 +00:00
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(if eval
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|
(let ((v (eval (car (read-from-string arg)))))
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(when v
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|
|
(with-temp-buffer
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|
|
(let ((standard-output (current-buffer)))
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(pp v)
|
2004-10-08 15:50:59 +00:00
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;; Suppress the error rose when the pipe to PROC is closed.
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|
(condition-case err
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(process-send-region proc (point-min) (point-max))
|
2004-12-30 23:14:25 +00:00
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|
(file-error nil)
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(error nil))
|
2004-10-08 15:50:59 +00:00
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))))
|
2002-09-27 17:43:29 +00:00
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;; ARG is a file name.
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;; Collapse multiple slashes to single slashes.
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(setq arg (command-line-normalize-file-name arg))
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(push (list arg lineno columnno) files))
|
2002-09-25 19:54:13 +00:00
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(setq lineno 1)
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(setq columnno 0)))))
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(when files
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|
(run-hooks 'pre-command-hook)
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(server-visit-files files client nowait)
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|
(run-hooks 'post-command-hook))
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;; CLIENT is now a list (CLIENTNUM BUFFERS...)
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(if (null (cdr client))
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;; This client is empty; get rid of it immediately.
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(progn
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(delete-process proc)
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|
(server-log "Close empty client" proc))
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;; We visited some buffer for this client.
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|
|
(or nowait (push client server-clients))
|
2003-01-13 16:44:07 +00:00
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|
|
(unless (or isearch-mode (minibufferp))
|
2003-01-13 08:04:17 +00:00
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|
|
(server-switch-buffer (nth 1 client))
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|
|
(run-hooks 'server-switch-hook)
|
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|
|
|
(unless nowait
|
|
|
|
|
(message (substitute-command-keys
|
2004-03-19 00:50:48 +00:00
|
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|
|
"When done with a buffer, type \\[server-edit]")))))
|
|
|
|
|
;; Avoid preserving the connection after the last real frame is deleted.
|
|
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|
|
(if tmp-frame (delete-frame tmp-frame))))
|
1994-12-29 01:43:50 +00:00
|
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|
|
;; Save for later any partial line that remains.
|
2002-09-25 19:54:13 +00:00
|
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|
|
(when (> (length string) 0)
|
2003-02-10 21:44:24 +00:00
|
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|
|
(process-put proc 'previous-string string)))
|
1990-02-22 10:44:55 +00:00
|
|
|
|
|
2002-08-15 20:13:48 +00:00
|
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|
|
(defun server-goto-line-column (file-line-col)
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|
(goto-line (nth 1 file-line-col))
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|
(let ((column-number (nth 2 file-line-col)))
|
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|
|
(if (> column-number 0)
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|
|
(move-to-column (1- column-number)))))
|
|
|
|
|
|
1996-08-28 23:26:13 +00:00
|
|
|
|
(defun server-visit-files (files client &optional nowait)
|
2002-09-27 17:43:29 +00:00
|
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|
|
"Find FILES and return the list CLIENT with the buffers nconc'd.
|
2001-07-17 10:55:28 +00:00
|
|
|
|
FILES is an alist whose elements are (FILENAME LINENUMBER COLUMNNUMBER).
|
1996-08-28 23:26:13 +00:00
|
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|
|
NOWAIT non-nil means this client is not waiting for the results,
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|
|
so don't mark these buffers specially, just visit them normally."
|
1994-05-28 17:22:31 +00:00
|
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|
|
;; Bind last-nonmenu-event to force use of keyboard, not mouse, for queries.
|
2002-09-27 17:43:29 +00:00
|
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|
|
(let ((last-nonmenu-event t) client-record)
|
1993-08-09 05:56:29 +00:00
|
|
|
|
;; Restore the current buffer afterward, but not using save-excursion,
|
|
|
|
|
;; because we don't want to save point in this buffer
|
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|
;; if it happens to be one of those specified by the server.
|
2002-09-27 17:43:29 +00:00
|
|
|
|
(save-current-buffer
|
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|
|
|
(dolist (file files)
|
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|
|
|
;; If there is an existing buffer modified or the file is
|
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|
|
;; modified, revert it. If there is an existing buffer with
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|
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|
|
;; deleted file, offer to write it.
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|
|
|
(let* ((filen (car file))
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|
|
|
(obuf (get-file-buffer filen)))
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|
|
|
(push filen file-name-history)
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|
|
|
(if (and obuf (set-buffer obuf))
|
|
|
|
|
(progn
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|
|
|
(cond ((file-exists-p filen)
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|
|
(if (not (verify-visited-file-modtime obuf))
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|
|
(revert-buffer t nil)))
|
|
|
|
|
(t
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|
|
|
(if (y-or-n-p
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|
|
|
(concat "File no longer exists: "
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|
|
|
|
filen
|
|
|
|
|
", write buffer to file? "))
|
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|
|
|
(write-file filen))))
|
|
|
|
|
(setq server-existing-buffer t)
|
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|
|
|
(server-goto-line-column file))
|
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|
|
|
(set-buffer (find-file-noselect filen))
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|
|
(server-goto-line-column file)
|
|
|
|
|
(run-hooks 'server-visit-hook)))
|
|
|
|
|
(unless nowait
|
|
|
|
|
;; When the buffer is killed, inform the clients.
|
|
|
|
|
(add-hook 'kill-buffer-hook 'server-kill-buffer nil t)
|
|
|
|
|
(push (car client) server-buffer-clients))
|
|
|
|
|
(push (current-buffer) client-record)))
|
1990-02-22 10:44:55 +00:00
|
|
|
|
(nconc client client-record)))
|
|
|
|
|
|
1997-05-10 00:37:24 +00:00
|
|
|
|
(defun server-buffer-done (buffer &optional for-killing)
|
1990-02-22 10:44:55 +00:00
|
|
|
|
"Mark BUFFER as \"done\" for its client(s).
|
1995-03-11 20:32:48 +00:00
|
|
|
|
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,
|
2002-09-18 02:10:18 +00:00
|
|
|
|
or nil. KILLED is t if we killed BUFFER (typically, because it was visiting
|
|
|
|
|
a temp file).
|
|
|
|
|
FOR-KILLING if non-nil indicates that we are called from `kill-buffer'."
|
2002-09-25 19:54:13 +00:00
|
|
|
|
(let ((next-buffer nil)
|
1995-03-11 20:32:48 +00:00
|
|
|
|
(killed nil)
|
1990-02-22 10:44:55 +00:00
|
|
|
|
(old-clients server-clients))
|
|
|
|
|
(while old-clients
|
|
|
|
|
(let ((client (car old-clients)))
|
2002-09-18 02:10:18 +00:00
|
|
|
|
(or next-buffer
|
1990-02-22 10:44:55 +00:00
|
|
|
|
(setq next-buffer (nth 1 (memq buffer client))))
|
|
|
|
|
(delq buffer client)
|
1994-12-29 01:43:50 +00:00
|
|
|
|
;; Delete all dead buffers from CLIENT.
|
|
|
|
|
(let ((tail client))
|
|
|
|
|
(while tail
|
|
|
|
|
(and (bufferp (car tail))
|
|
|
|
|
(null (buffer-name (car tail)))
|
|
|
|
|
(delq (car tail) client))
|
|
|
|
|
(setq tail (cdr tail))))
|
1990-02-22 10:44:55 +00:00
|
|
|
|
;; If client now has no pending buffers,
|
|
|
|
|
;; tell it that it is done, and forget it entirely.
|
2002-09-25 19:54:13 +00:00
|
|
|
|
(unless (cdr client)
|
|
|
|
|
(delete-process (car client))
|
|
|
|
|
(server-log "Close" (car client))
|
1990-02-22 10:44:55 +00:00
|
|
|
|
(setq server-clients (delq client server-clients))))
|
|
|
|
|
(setq old-clients (cdr old-clients)))
|
1994-12-29 01:43:50 +00:00
|
|
|
|
(if (and (bufferp buffer) (buffer-name buffer))
|
1998-05-05 00:39:35 +00:00
|
|
|
|
;; 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))
|
2002-11-02 05:29:13 +00:00
|
|
|
|
(with-current-buffer buffer
|
1994-05-20 23:48:12 +00:00
|
|
|
|
(setq server-buffer-clients nil)
|
|
|
|
|
(run-hooks 'server-done-hook))
|
1998-05-05 00:39:35 +00:00
|
|
|
|
;; 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
|
2000-08-21 15:26:01 +00:00
|
|
|
|
(when (and (not killed)
|
|
|
|
|
server-kill-new-buffers
|
2001-11-11 17:56:23 +00:00
|
|
|
|
(with-current-buffer buffer
|
|
|
|
|
(not server-existing-buffer)))
|
2000-08-21 15:26:01 +00:00
|
|
|
|
(setq killed t)
|
2000-12-18 17:01:16 +00:00
|
|
|
|
(bury-buffer buffer)
|
2000-08-21 15:26:01 +00:00
|
|
|
|
(kill-buffer buffer))
|
|
|
|
|
(unless killed
|
|
|
|
|
(if (server-temp-file-p buffer)
|
|
|
|
|
(progn
|
|
|
|
|
(kill-buffer buffer)
|
|
|
|
|
(setq killed t))
|
|
|
|
|
(bury-buffer buffer)))))))
|
1995-03-11 20:32:48 +00:00
|
|
|
|
(list next-buffer killed)))
|
1990-02-22 10:44:55 +00:00
|
|
|
|
|
2002-11-02 05:29:13 +00:00
|
|
|
|
(defun server-temp-file-p (&optional buffer)
|
1990-02-22 10:44:55 +00:00
|
|
|
|
"Return non-nil if BUFFER contains a file considered temporary.
|
|
|
|
|
These are files whose names suggest they are repeatedly
|
|
|
|
|
reused to pass information to another program.
|
|
|
|
|
|
|
|
|
|
The variable `server-temp-file-regexp' controls which filenames
|
|
|
|
|
are considered temporary."
|
|
|
|
|
(and (buffer-file-name buffer)
|
|
|
|
|
(string-match server-temp-file-regexp (buffer-file-name buffer))))
|
|
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|
|
(defun server-done ()
|
1992-11-03 21:08:55 +00:00
|
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|
|
"Offer to save current buffer, mark it as \"done\" for clients.
|
2001-11-13 03:14:23 +00:00
|
|
|
|
This kills or 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.
|
|
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|
|
KILLED is t if we killed BUFFER, which happens if it was created
|
|
|
|
|
specifically for the clients and did not exist before their request for it."
|
2002-11-02 05:29:13 +00:00
|
|
|
|
(when server-buffer-clients
|
|
|
|
|
(if (server-temp-file-p)
|
|
|
|
|
;; For a temp file, save, and do make a non-numeric backup
|
|
|
|
|
;; (unless make-backup-files is nil).
|
|
|
|
|
(let ((version-control nil)
|
|
|
|
|
(buffer-backed-up nil))
|
|
|
|
|
(save-buffer))
|
|
|
|
|
(if (and (buffer-modified-p)
|
|
|
|
|
buffer-file-name
|
|
|
|
|
(y-or-n-p (concat "Save file " buffer-file-name "? ")))
|
|
|
|
|
(save-buffer)))
|
|
|
|
|
(server-buffer-done (current-buffer))))
|
1994-03-03 19:23:59 +00:00
|
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|
1994-11-10 16:13:30 +00:00
|
|
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|
;; Ask before killing a server buffer.
|
|
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|
;; It was suggested to release its client instead,
|
|
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|
;; but I think that is dangerous--the client would proceed
|
|
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|
;; using whatever is on disk in that file. -- rms.
|
1994-04-20 20:26:25 +00:00
|
|
|
|
(defun server-kill-buffer-query-function ()
|
|
|
|
|
(or (not server-buffer-clients)
|
|
|
|
|
(yes-or-no-p (format "Buffer `%s' still has clients; kill it? "
|
|
|
|
|
(buffer-name (current-buffer))))))
|
|
|
|
|
|
1994-03-03 19:23:59 +00:00
|
|
|
|
(add-hook 'kill-buffer-query-functions
|
1994-04-20 20:26:25 +00:00
|
|
|
|
'server-kill-buffer-query-function)
|
|
|
|
|
|
|
|
|
|
(defun server-kill-emacs-query-function ()
|
1994-05-28 17:22:31 +00:00
|
|
|
|
(let (live-client
|
|
|
|
|
(tail server-clients))
|
|
|
|
|
;; See if any clients have any buffers that are still alive.
|
|
|
|
|
(while tail
|
|
|
|
|
(if (memq t (mapcar 'stringp (mapcar 'buffer-name (cdr (car tail)))))
|
|
|
|
|
(setq live-client t))
|
|
|
|
|
(setq tail (cdr tail)))
|
|
|
|
|
(or (not live-client)
|
|
|
|
|
(yes-or-no-p "Server buffers still have clients; exit anyway? "))))
|
1994-04-20 20:26:25 +00:00
|
|
|
|
|
|
|
|
|
(add-hook 'kill-emacs-query-functions 'server-kill-emacs-query-function)
|
1997-05-10 00:37:24 +00:00
|
|
|
|
|
1997-05-31 00:31:40 +00:00
|
|
|
|
(defvar server-kill-buffer-running nil
|
1998-05-05 00:39:35 +00:00
|
|
|
|
"Non-nil while `server-kill-buffer' or `server-buffer-done' is running.")
|
1997-05-31 00:31:40 +00:00
|
|
|
|
|
1997-05-10 00:37:24 +00:00
|
|
|
|
(defun server-kill-buffer ()
|
1997-05-31 00:31:40 +00:00
|
|
|
|
;; Prevent infinite recursion if user has made server-done-hook
|
|
|
|
|
;; call kill-buffer.
|
|
|
|
|
(or server-kill-buffer-running
|
1998-05-05 00:39:35 +00:00
|
|
|
|
(and server-buffer-clients
|
|
|
|
|
(let ((server-kill-buffer-running t))
|
|
|
|
|
(when server-process
|
|
|
|
|
(server-buffer-done (current-buffer) t))))))
|
1990-02-22 10:44:55 +00:00
|
|
|
|
|
|
|
|
|
(defun server-edit (&optional arg)
|
|
|
|
|
"Switch to next server editing buffer; say \"Done\" for current buffer.
|
|
|
|
|
If a server buffer is current, it is marked \"done\" and optionally saved.
|
2001-11-13 03:14:23 +00:00
|
|
|
|
The buffer is also killed if it did not exist before the clients asked for it.
|
1990-02-22 10:44:55 +00:00
|
|
|
|
When all of a client's buffers are marked as \"done\", the client is notified.
|
|
|
|
|
|
|
|
|
|
Temporary files such as MH <draft> files are always saved and backed up,
|
1993-07-15 04:01:14 +00:00
|
|
|
|
no questions asked. (The variable `make-backup-files', if nil, still
|
|
|
|
|
inhibits a backup; you can set it locally in a particular buffer to
|
|
|
|
|
prevent a backup for it.) The variable `server-temp-file-regexp' controls
|
1990-02-22 10:44:55 +00:00
|
|
|
|
which filenames are considered temporary.
|
|
|
|
|
|
2003-01-13 16:44:07 +00:00
|
|
|
|
If invoked with a prefix argument, or if there is no server process running,
|
1990-02-22 10:44:55 +00:00
|
|
|
|
starts server process and that is all. Invoked by \\[server-edit]."
|
|
|
|
|
(interactive "P")
|
|
|
|
|
(if (or arg
|
|
|
|
|
(not server-process)
|
|
|
|
|
(memq (process-status server-process) '(signal exit)))
|
|
|
|
|
(server-start nil)
|
1995-03-11 20:32:48 +00:00
|
|
|
|
(apply 'server-switch-buffer (server-done))))
|
1990-02-22 10:44:55 +00:00
|
|
|
|
|
1995-04-09 18:57:09 +00:00
|
|
|
|
(defun server-switch-buffer (&optional next-buffer killed-one)
|
1990-02-22 10:44:55 +00:00
|
|
|
|
"Switch to another buffer, preferably one that has a client.
|
|
|
|
|
Arg NEXT-BUFFER is a suggestion; if it is a live buffer, use it."
|
1995-03-11 20:32:48 +00:00
|
|
|
|
;; KILLED-ONE is t in a recursive call
|
|
|
|
|
;; if we have already killed one temp-file server buffer.
|
|
|
|
|
;; This means we should avoid the final "switch to some other buffer"
|
|
|
|
|
;; since we've already effectively done that.
|
2002-09-18 12:19:57 +00:00
|
|
|
|
(if (null next-buffer)
|
|
|
|
|
(if server-clients
|
|
|
|
|
(server-switch-buffer (nth 1 (car server-clients)) killed-one)
|
2002-09-25 19:54:13 +00:00
|
|
|
|
(unless (or killed-one (window-dedicated-p (selected-window)))
|
2002-10-29 18:17:46 +00:00
|
|
|
|
(switch-to-buffer (other-buffer))
|
|
|
|
|
(message "No server buffers remain to edit")))
|
2002-09-18 12:19:57 +00:00
|
|
|
|
(if (not (buffer-name next-buffer))
|
|
|
|
|
;; If NEXT-BUFFER is a dead buffer, remove the server records for it
|
1990-02-22 10:44:55 +00:00
|
|
|
|
;; and try the next surviving server buffer.
|
2002-09-18 12:19:57 +00:00
|
|
|
|
(apply 'server-switch-buffer (server-buffer-done next-buffer))
|
|
|
|
|
;; OK, we know next-buffer is live, let's display and select it.
|
2002-11-02 05:29:13 +00:00
|
|
|
|
(if (functionp server-window)
|
|
|
|
|
(funcall server-window next-buffer)
|
|
|
|
|
(let ((win (get-buffer-window next-buffer 0)))
|
|
|
|
|
(if (and win (not server-window))
|
|
|
|
|
;; The buffer is already displayed: just reuse the window.
|
|
|
|
|
(let ((frame (window-frame win)))
|
|
|
|
|
(if (eq (frame-visible-p frame) 'icon)
|
|
|
|
|
(raise-frame frame))
|
|
|
|
|
(select-window win)
|
|
|
|
|
(set-buffer next-buffer))
|
|
|
|
|
;; Otherwise, let's find an appropriate window.
|
|
|
|
|
(cond ((and (windowp server-window)
|
|
|
|
|
(window-live-p server-window))
|
|
|
|
|
(select-window server-window))
|
|
|
|
|
((framep server-window)
|
|
|
|
|
(if (not (frame-live-p server-window))
|
|
|
|
|
(setq server-window (make-frame)))
|
|
|
|
|
(select-window (frame-selected-window server-window))))
|
|
|
|
|
(if (window-minibuffer-p (selected-window))
|
|
|
|
|
(select-window (next-window nil 'nomini 0)))
|
|
|
|
|
;; Move to a non-dedicated window, if we have one.
|
|
|
|
|
(when (window-dedicated-p (selected-window))
|
|
|
|
|
(select-window
|
|
|
|
|
(get-window-with-predicate
|
|
|
|
|
(lambda (w)
|
|
|
|
|
(and (not (window-dedicated-p w))
|
|
|
|
|
(equal (frame-parameter (window-frame w) 'display)
|
|
|
|
|
(frame-parameter (selected-frame) 'display))))
|
|
|
|
|
'nomini 'visible (selected-window))))
|
|
|
|
|
(condition-case nil
|
|
|
|
|
(switch-to-buffer next-buffer)
|
|
|
|
|
;; After all the above, we might still have ended up with
|
|
|
|
|
;; a minibuffer/dedicated-window (if there's no other).
|
|
|
|
|
(error (pop-to-buffer next-buffer)))))))))
|
1990-02-22 10:44:55 +00:00
|
|
|
|
|
2005-07-16 11:58:10 +00:00
|
|
|
|
(define-key ctl-x-map "#" 'server-edit)
|
2001-12-18 16:42:38 +00:00
|
|
|
|
|
|
|
|
|
(defun server-unload-hook ()
|
2003-01-15 17:49:32 +00:00
|
|
|
|
(server-start t)
|
2001-12-18 16:42:38 +00:00
|
|
|
|
(remove-hook 'kill-buffer-query-functions 'server-kill-buffer-query-function)
|
|
|
|
|
(remove-hook 'kill-emacs-query-functions 'server-kill-emacs-query-function)
|
|
|
|
|
(remove-hook 'kill-buffer-hook 'server-kill-buffer))
|
2004-10-17 06:55:07 +00:00
|
|
|
|
|
|
|
|
|
(add-hook 'server-unload-hook 'server-unload-hook)
|
1992-09-04 21:49:15 +00:00
|
|
|
|
|
|
|
|
|
(provide 'server)
|
1992-05-30 21:11:25 +00:00
|
|
|
|
|
2003-09-01 15:45:59 +00:00
|
|
|
|
;;; arch-tag: 1f7ecb42-f00a-49f8-906d-61995d84c8d6
|
1992-05-30 21:11:25 +00:00
|
|
|
|
;;; server.el ends here
|