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Annotation of GNUtools/emacs/lisp/vmsproc.el, revision 1.1.1.1

1.1       root        1: ;; Run asynchronous VMS subprocesses under Emacs
                      2: ;; Copyright (C) 1986 Free Software Foundation, Inc.
                      3: 
                      4: ;; This file is part of GNU Emacs.
                      5: 
                      6: ;; GNU Emacs is free software; you can redistribute it and/or modify
                      7: ;; it under the terms of the GNU General Public License as published by
                      8: ;; the Free Software Foundation; either version 1, or (at your option)
                      9: ;; any later version.
                     10: 
                     11: ;; GNU Emacs is distributed in the hope that it will be useful,
                     12: ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
                     13: ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     14: ;; GNU General Public License for more details.
                     15: 
                     16: ;; You should have received a copy of the GNU General Public License
                     17: ;; along with GNU Emacs; see the file COPYING.  If not, write to
                     18: ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
                     19: 
                     20: ;; Written by Mukesh Prasad.
                     21: 
                     22: (defvar display-subprocess-window nil
                     23:   "If non-nil, the suprocess window is displayed whenever input is received.")
                     24: 
                     25: (defvar command-prefix-string "$ "
                     26:   "String to insert to distinguish commands entered by user.")
                     27: 
                     28: (defvar subprocess-running nil)
                     29: (defvar command-mode-map nil)
                     30: 
                     31: (if command-mode-map
                     32:     nil
                     33:   (setq command-mode-map (make-sparse-keymap))
                     34:   (define-key command-mode-map "\C-m" 'command-send-input)
                     35:   (define-key command-mode-map "\C-u" 'command-kill-line))
                     36: 
                     37: (defun subprocess-input (name str)
                     38:    "Handles input from a subprocess.  Called by Emacs."
                     39:    (if display-subprocess-window
                     40:       (display-buffer subprocess-buf))
                     41:    (let ((old-buffer (current-buffer)))
                     42:       (set-buffer subprocess-buf)
                     43:       (goto-char (point-max))
                     44:       (insert str)
                     45:       (insert ?\n)
                     46:       (set-buffer old-buffer)))
                     47: 
                     48: (defun subprocess-exit (name)
                     49:    "Called by Emacs upon subprocess exit."
                     50:    (setq subprocess-running nil))
                     51: 
                     52: (defun start-subprocess ()
                     53:    "Spawns an asynchronous subprocess with output redirected to
                     54: the buffer *COMMAND*.  Within this buffer, use C-m to send
                     55: the last line to the subprocess or to bring another line to
                     56: the end."
                     57:    (if subprocess-running
                     58:        (return t))
                     59:    (setq subprocess-buf (get-buffer-create "*COMMAND*"))
                     60:    (save-excursion
                     61:        (set-buffer subprocess-buf)
                     62:        (use-local-map command-mode-map))
                     63:    (setq subprocess-running (spawn-subprocess 1 'subprocess-input
                     64:                                                'subprocess-exit))
                     65:    ;; Initialize subprocess so it doesn't panic and die upon
                     66:    ;; encountering the first error.
                     67:    (and subprocess-running
                     68:         (send-command-to-subprocess 1 "ON SEVERE_ERROR THEN CONTINUE")))
                     69: 
                     70: (defun subprocess-command ()
                     71:   "Starts asynchronous subprocess if not running and switches to its window."
                     72:   (interactive)
                     73:   (if (not subprocess-running)
                     74:       (start-subprocess))
                     75:   (and subprocess-running
                     76:       (progn (pop-to-buffer subprocess-buf) (goto-char (point-max)))))
                     77: 
                     78: (defun command-send-input ()
                     79:   "If at last line of buffer, sends the current line to
                     80: the spawned subprocess.  Otherwise brings back current
                     81: line to the last line for resubmission."
                     82:   (interactive)
                     83:   (beginning-of-line)
                     84:   (let ((current-line (buffer-substring (point)
                     85:                                         (progn (end-of-line) (point)))))
                     86:     (if (eobp)
                     87:       (progn
                     88:         (if (not subprocess-running)
                     89:             (start-subprocess))
                     90:         (if subprocess-running
                     91:           (progn
                     92:             (beginning-of-line)
                     93:             (send-command-to-subprocess 1 current-line)
                     94:             (if command-prefix-string
                     95:               (progn (beginning-of-line) (insert command-prefix-string)))
                     96:             (next-line 1))))
                     97:       ;; else -- if not at last line in buffer
                     98:       (end-of-buffer)
                     99:       (backward-char)
                    100:       (next-line 1)
                    101:       (if (string-equal command-prefix-string
                    102:                 (substring current-line 0 (length command-prefix-string)))
                    103:          (insert (substring current-line (length command-prefix-string)))
                    104:           (insert current-line)))))
                    105: 
                    106: (defun command-kill-line()
                    107:   "Kills the current line.  Used in command mode."
                    108:   (interactive)
                    109:   (beginning-of-line)
                    110:   (kill-line))
                    111: 
                    112: (define-key esc-map "$" 'subprocess-command)

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