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Annotation of 43BSDReno/contrib/emacs-18.55/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 distributed in the hope that it will be useful,
        !             7: ;; but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: ;; accepts responsibility to anyone for the consequences of using it
        !             9: ;; or for whether it serves any particular purpose or works at all,
        !            10: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
        !            11: ;; License for full details.
        !            12: 
        !            13: ;; Everyone is granted permission to copy, modify and redistribute
        !            14: ;; GNU Emacs, but only under the conditions described in the
        !            15: ;; GNU Emacs General Public License.   A copy of this license is
        !            16: ;; supposed to have been given to you along with GNU Emacs so you
        !            17: ;; can know your rights and responsibilities.  It should be in a
        !            18: ;; file named COPYING.  Among other things, the copyright notice
        !            19: ;; and this notice must be preserved on all copies.
        !            20: 
        !            21: ;; Written by Mukesh Prasad.
        !            22: 
        !            23: (defvar display-subprocess-window nil
        !            24:   "If non-nil, the suprocess window is displayed whenever input is received.")
        !            25: 
        !            26: (defvar command-prefix-string "$ "
        !            27:   "String to insert to distinguish commands entered by user.")
        !            28: 
        !            29: (defvar subprocess-running nil)
        !            30: (defvar command-mode-map nil)
        !            31: 
        !            32: (if command-mode-map
        !            33:     nil
        !            34:   (setq command-mode-map (make-sparse-keymap))
        !            35:   (define-key command-mode-map "\C-m" 'command-send-input)
        !            36:   (define-key command-mode-map "\C-u" 'command-kill-line))
        !            37: 
        !            38: (defun subprocess-input (name str)
        !            39:    "Handles input from a subprocess.  Called by Emacs."
        !            40:    (if display-subprocess-window
        !            41:       (display-buffer subprocess-buf))
        !            42:    (let ((old-buffer (current-buffer)))
        !            43:       (set-buffer subprocess-buf)
        !            44:       (goto-char (point-max))
        !            45:       (insert str)
        !            46:       (insert ?\n)
        !            47:       (set-buffer old-buffer)))
        !            48: 
        !            49: (defun subprocess-exit (name)
        !            50:    "Called by Emacs upon subprocess exit."
        !            51:    (setq subprocess-running nil))
        !            52: 
        !            53: (defun start-subprocess ()
        !            54:    "Spawns an asynchronous subprocess with output redirected to
        !            55: the buffer *COMMAND*.  Within this buffer, use C-m to send
        !            56: the last line to the subprocess or to bring another line to
        !            57: the end."
        !            58:    (if subprocess-running
        !            59:        (return t))
        !            60:    (setq subprocess-buf (get-buffer-create "*COMMAND*"))
        !            61:    (save-excursion
        !            62:        (set-buffer subprocess-buf)
        !            63:        (use-local-map command-mode-map))
        !            64:    (setq subprocess-running (spawn-subprocess 1 'subprocess-input
        !            65:                                                'subprocess-exit))
        !            66:    ;; Initialize subprocess so it doesn't panic and die upon
        !            67:    ;; encountering the first error.
        !            68:    (and subprocess-running
        !            69:         (send-command-to-subprocess 1 "ON SEVERE_ERROR THEN CONTINUE")))
        !            70: 
        !            71: (defun subprocess-command ()
        !            72:   "Starts asynchronous subprocess if not running and switches to its window."
        !            73:   (interactive)
        !            74:   (if (not subprocess-running)
        !            75:       (start-subprocess))
        !            76:   (and subprocess-running
        !            77:       (progn (pop-to-buffer subprocess-buf) (goto-char (point-max)))))
        !            78: 
        !            79: (defun command-send-input ()
        !            80:   "If at last line of buffer, sends the current line to
        !            81: the spawned subprocess.  Otherwise brings back current
        !            82: line to the last line for resubmission."
        !            83:   (interactive)
        !            84:   (beginning-of-line)
        !            85:   (let ((current-line (buffer-substring (point)
        !            86:                                         (progn (end-of-line) (point)))))
        !            87:     (if (eobp)
        !            88:       (progn
        !            89:         (if (not subprocess-running)
        !            90:             (start-subprocess))
        !            91:         (if subprocess-running
        !            92:           (progn
        !            93:             (beginning-of-line)
        !            94:             (send-command-to-subprocess 1 current-line)
        !            95:             (if command-prefix-string
        !            96:               (progn (beginning-of-line) (insert command-prefix-string)))
        !            97:             (next-line 1))))
        !            98:       ;; else -- if not at last line in buffer
        !            99:       (end-of-buffer)
        !           100:       (backward-char)
        !           101:       (next-line 1)
        !           102:       (if (string-equal command-prefix-string
        !           103:                 (substring current-line 0 (length command-prefix-string)))
        !           104:          (insert (substring current-line (length command-prefix-string)))
        !           105:           (insert current-line)))))
        !           106: 
        !           107: (defun command-kill-line()
        !           108:   "Kills the current line.  Used in command mode."
        !           109:   (interactive)
        !           110:   (beginning-of-line)
        !           111:   (kill-line))
        !           112: 
        !           113: (define-key esc-map "$" 'subprocess-command)

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