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- ;; Run asynchronous VMS subprocesses under Emacs
- ;; Copyright (C) 1986 Free Software Foundation, Inc.
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 1, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to
- ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- ;; Written by Mukesh Prasad.
-
- (defvar display-subprocess-window nil
- "If non-nil, the suprocess window is displayed whenever input is received.")
-
- (defvar command-prefix-string "$ "
- "String to insert to distinguish commands entered by user.")
-
- (defvar subprocess-running nil)
- (defvar command-mode-map nil)
-
- (if command-mode-map
- nil
- (setq command-mode-map (make-sparse-keymap))
- (define-key command-mode-map "\C-m" 'command-send-input)
- (define-key command-mode-map "\C-u" 'command-kill-line))
-
- (defun subprocess-input (name str)
- "Handles input from a subprocess. Called by Emacs."
- (if display-subprocess-window
- (display-buffer subprocess-buf))
- (let ((old-buffer (current-buffer)))
- (set-buffer subprocess-buf)
- (goto-char (point-max))
- (insert str)
- (insert ?\n)
- (set-buffer old-buffer)))
-
- (defun subprocess-exit (name)
- "Called by Emacs upon subprocess exit."
- (setq subprocess-running nil))
-
- (defun start-subprocess ()
- "Spawns an asynchronous subprocess with output redirected to
- the buffer *COMMAND*. Within this buffer, use C-m to send
- the last line to the subprocess or to bring another line to
- the end."
- (if subprocess-running
- (return t))
- (setq subprocess-buf (get-buffer-create "*COMMAND*"))
- (save-excursion
- (set-buffer subprocess-buf)
- (use-local-map command-mode-map))
- (setq subprocess-running (spawn-subprocess 1 'subprocess-input
- 'subprocess-exit))
- ;; Initialize subprocess so it doesn't panic and die upon
- ;; encountering the first error.
- (and subprocess-running
- (send-command-to-subprocess 1 "ON SEVERE_ERROR THEN CONTINUE")))
-
- (defun subprocess-command ()
- "Starts asynchronous subprocess if not running and switches to its window."
- (interactive)
- (if (not subprocess-running)
- (start-subprocess))
- (and subprocess-running
- (progn (pop-to-buffer subprocess-buf) (goto-char (point-max)))))
-
- (defun command-send-input ()
- "If at last line of buffer, sends the current line to
- the spawned subprocess. Otherwise brings back current
- line to the last line for resubmission."
- (interactive)
- (beginning-of-line)
- (let ((current-line (buffer-substring (point)
- (progn (end-of-line) (point)))))
- (if (eobp)
- (progn
- (if (not subprocess-running)
- (start-subprocess))
- (if subprocess-running
- (progn
- (beginning-of-line)
- (send-command-to-subprocess 1 current-line)
- (if command-prefix-string
- (progn (beginning-of-line) (insert command-prefix-string)))
- (next-line 1))))
- ;; else -- if not at last line in buffer
- (end-of-buffer)
- (backward-char)
- (next-line 1)
- (if (string-equal command-prefix-string
- (substring current-line 0 (length command-prefix-string)))
- (insert (substring current-line (length command-prefix-string)))
- (insert current-line)))))
-
- (defun command-kill-line()
- "Kills the current line. Used in command mode."
- (interactive)
- (beginning-of-line)
- (kill-line))
-
- (define-key esc-map "$" 'subprocess-command)
-