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266 lines
9.2 KiB
EmacsLisp
266 lines
9.2 KiB
EmacsLisp
;;; vms-patch.el --- override parts of files.el for VMS
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;; Copyright (C) 1986, 1992, 2002, 2003, 2004,
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;; 2005 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; Keywords: vms
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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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;; the Free Software Foundation; either version 2, or (at your option)
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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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;; along with GNU Emacs; see the file COPYING. If not, write to the
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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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;;; Commentary:
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;;; Code:
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(setq auto-mode-alist (cons '(("\\.com\\'" . dcl-mode)) auto-mode-alist))
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;;; Functions that need redefinition
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;;; VMS file names are upper case, but buffer names are more
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;;; convenient in lower case.
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(defun create-file-buffer (filename)
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"Create a suitably named buffer for visiting FILENAME, and return it.
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FILENAME (sans directory) is used unchanged if that name is free;
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otherwise a string <2> or <3> or ... is appended to get an unused name."
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(generate-new-buffer (downcase (file-name-nondirectory filename))))
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;;; Given a string FN, return a similar name which is a legal VMS filename.
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;;; This is used to avoid invalid auto save file names.
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(defun make-legal-file-name (fn)
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(setq fn (copy-sequence fn))
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(let ((dot nil) (indx 0) (len (length fn)) chr)
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(while (< indx len)
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(setq chr (aref fn indx))
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(cond
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((eq chr ?.) (if dot (aset fn indx ?_) (setq dot t)))
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((not (or (and (>= chr ?a) (<= chr ?z)) (and (>= chr ?A) (<= chr ?Z))
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(and (>= chr ?0) (<= chr ?9))
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(eq chr ?$) (eq chr ?_) (and (eq chr ?-) (> indx 0))))
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(aset fn indx ?_)))
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(setq indx (1+ indx))))
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fn)
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;;; Auto save filesnames start with _$ and end with $.
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(defun make-auto-save-file-name ()
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"Return file name to use for auto-saves of current buffer.
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This function does not consider `auto-save-visited-file-name';
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the caller should check that before calling this function.
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This is a separate function so that your `.emacs' file or the site's
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`site-init.el' can redefine it.
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See also `auto-save-file-name-p'."
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(if buffer-file-name
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(concat (file-name-directory buffer-file-name)
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"_$"
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(file-name-nondirectory buffer-file-name)
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"$")
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(expand-file-name (concat "_$_" (make-legal-file-name (buffer-name)) "$"))))
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(defun auto-save-file-name-p (filename)
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"Return t if FILENAME can be yielded by `make-auto-save-file-name'.
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FILENAME should lack slashes.
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This is a separate function so that your `.emacs' file or the site's
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`site-init.el' can redefine it."
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(string-match "^_\\$.*\\$" filename))
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;;;
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;;; This goes along with kepteditor.com which defines these logicals
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;;; If EMACS_COMMAND_ARGS is defined, it supersedes EMACS_FILE_NAME,
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;;; which is probably set up incorrectly anyway.
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;;; The function command-line-again is a kludge, but it does the job.
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;;;
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(defun vms-suspend-resume-hook ()
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"When resuming suspended Emacs, check for file to be found.
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If the logical name `EMACS_FILE_NAME' is defined, `find-file' that file."
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(let ((file (vms-system-info "LOGICAL" "EMACS_FILE_NAME"))
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(args (vms-system-info "LOGICAL" "EMACS_COMMAND_ARGS"))
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(line (vms-system-info "LOGICAL" "EMACS_FILE_LINE")))
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(if (not args)
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(if file
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(progn (find-file file)
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(if line (goto-line (string-to-number line)))))
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(cd (file-name-directory file))
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(vms-command-line-again))))
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(setq suspend-resume-hook 'vms-suspend-resume-hook)
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(defun vms-suspend-hook ()
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"Don't allow suspending if logical name `DONT_SUSPEND_EMACS' is defined."
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(if (vms-system-info "LOGICAL" "DONT_SUSPEND_EMACS")
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(error "Can't suspend this emacs"))
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nil)
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(setq suspend-hook 'vms-suspend-hook)
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;;;
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;;; A kludge that allows reprocessing of the command line. This is mostly
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;;; to allow a spawned VMS mail process to do something reasonable when
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;;; used in conjunction with the modifications to sysdep.c that allow
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;;; Emacs to attach to a "foster" parent.
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;;;
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(defun vms-command-line-again ()
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"Reprocess command line arguments. VMS specific.
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Command line arguments are initialized from the logical EMACS_COMMAND_ARGS
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which is defined by kepteditor.com. On VMS this allows attaching to a
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spawned Emacs and doing things like \"emacs -l myfile.el -f doit\""
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(let* ((args (downcase (vms-system-info "LOGICAL" "EMACS_COMMAND_ARGS")))
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(command-line-args (list "emacs"))
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(beg 0)
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(end 0)
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(len (length args))
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this-char)
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(if args
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(progn
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;;; replace non-printable stuff with spaces
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(while (< beg (length args))
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(if (or (> 33 (setq this-char (aref args beg)))
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(< 127 this-char))
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(aset args beg 32))
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(setq beg (1+ beg)))
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(setq beg (1- (length args)))
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(while (= 32 (aref args beg)) (setq beg (1- beg)))
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(setq args (substring args 0 (1+ beg)))
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(setq beg 0)
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;;; now start parsing args
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(while (< beg (length args))
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(while (and (< beg (length args))
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(or (> 33 (setq this-char (aref args beg)))
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(< 127 this-char))
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(setq beg (1+ beg))))
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(setq end (1+ beg))
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(while (and (< end (length args))
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(< 32 (setq this-char (aref args end)))
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(> 127 this-char))
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(setq end (1+ end)))
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(setq command-line-args (append
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command-line-args
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(list (substring args beg end))))
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(setq beg (1+ end)))
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(command-line)))))
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(defun vms-read-directory (dirname switches buffer)
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(save-excursion
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(set-buffer buffer)
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(subprocess-command-to-buffer
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(concat "DIRECTORY " switches " " dirname)
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buffer)
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(goto-char (point-min))
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;; Remove all the trailing blanks.
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(while (search-forward " \n")
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(forward-char -1)
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(delete-horizontal-space))
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(goto-char (point-min))))
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(setq dired-listing-switches
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"/SIZE/DATE/OWNER/WIDTH=(FILENAME=32,SIZE=5)")
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(setq print-region-function
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(lambda (start end command ign1 ign2 ign3 &rest switches)
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(write-region start end "sys$login:delete-me.txt")
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(send-command-to-subprocess
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1
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(concat command
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" sys$login:delete-me.txt/name=\"GNUprintbuffer\" "
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(mapconcat 'identity switches " "))
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nil nil nil)))
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;;;
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;;; Fuctions for using Emacs as a VMS Mail editor
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;;;
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(autoload 'vms-pmail-setup "vms-pmail"
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"Set up file assuming use by VMS Mail utility.
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The buffer is put into text-mode, auto-save is turned off and the
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following bindings are established.
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\\[vms-pmail-save-and-exit] vms-pmail-save-and-exit
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\\[vms-pmail-abort] vms-pmail-abort
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All other Emacs commands are still available."
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t)
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;;;
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;;; Filename handling in the minibuffer
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;;;
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(defun vms-magic-right-square-brace ()
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"\
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Insert a right square brace, but do other things first depending on context.
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During filename completion, when point is at the end of the line and the
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character before is not a right square brace, do one of three things before
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inserting the brace:
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- If there are already two left square braces preceding, do nothing special.
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- If there is a previous right-square-brace, convert it to dot.
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- If the character before is dot, delete it.
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Additionally, if the preceding chars are right-square-brace followed by
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either \"-\" or \"..\", strip one level of directory hierarchy."
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(interactive)
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(when (and minibuffer-completing-file-name
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(= (point) (point-max))
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(not (= 93 (char-before))))
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(cond
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;; Avoid clobbering: user:[one.path][another.path
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((search-backward "[" (field-beginning) t 2))
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((search-backward "]" (field-beginning) t)
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(delete-char 1)
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(insert ".")
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(goto-char (point-max)))
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((= ?. (char-before))
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(delete-char -1)))
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(goto-char (point-max))
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(let ((specs '(".." "-"))
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(pmax (point-max)))
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(while specs
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(let* ((up (car specs))
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(len (length up))
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(cut (- (point) len)))
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(when (and (< (1+ len) pmax)
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(= ?. (char-before cut))
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(string= up (buffer-substring cut (point))))
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(delete-char (- (1+ len)))
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(while (not (let ((c (char-before)))
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(or (= ?. c) (= 91 c))))
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(delete-char -1))
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(when (= ?. (char-before)) (delete-char -1))
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(setq specs nil)))
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(setq specs (cdr specs)))))
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(insert "]"))
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(defun vms-magic-colon ()
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"\
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Insert a colon, but do other things first depending on context.
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During filename completion, when point is at the end of the line
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and the line contains a right square brace, remove all characters
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from the beginning of the line up to and including such brace.
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This enables one to type a new filespec without having to delete
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the old one."
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(interactive)
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(when (and minibuffer-completing-file-name
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(= (point) (point-max))
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(search-backward "]" (field-beginning) t))
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(delete-region (field-beginning) (1+ (point)))
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(goto-char (point-max)))
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(insert ":"))
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(let ((m minibuffer-local-completion-map))
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(define-key m "]" 'vms-magic-right-square-brace)
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(define-key m "/" 'vms-magic-right-square-brace)
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(define-key m ":" 'vms-magic-colon))
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;;; arch-tag: c178494e-2c37-4d02-99b7-e47e615656cf
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;;; vms-patch.el ends here
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