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