[Emacs-diffs] Changes to obsolete/vms-patch.el

[Dan Nicolaescu]

CVSROOT:        /cvsroot/emacs
Module name:    emacs
Changes by:     Dan Nicolaescu <dann>   08/07/05 18:27:18

Index: obsolete/vms-patch.el
===================================================================
RCS file: obsolete/vms-patch.el
diff -N obsolete/vms-patch.el
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ obsolete/vms-patch.el       5 Jul 2008 18:27:14 -0000       1.1
@@ -0,0 +1,270 @@
+;; -*- no-byte-compile: t -*-
+;; Not byte compiled because it uses functions that are not part of
+;; emacs, so it would generate unnecessary warnings.
+;;; vms-patch.el --- override parts of files.el for VMS
+
+;; Copyright (C) 1986, 1992, 2001, 2002, 2003, 2004,
+;;   2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+
+;; Maintainer: FSF
+;; Keywords: vms
+
+;; 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 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(defvar print-region-function)
+
+(setq auto-mode-alist (cons '(("\\.com\\'" . dcl-mode)) auto-mode-alist))
+
+;;; Functions that need redefinition
+
+;;; VMS file names are upper case, but buffer names are more
+;;; convenient in lower case.
+
+(defun create-file-buffer (filename)
+  "Create a suitably named buffer for visiting FILENAME, and return it.
+FILENAME (sans directory) is used unchanged if that name is free;
+otherwise a string <2> or <3> or ... is appended to get an unused name."
+  (generate-new-buffer (downcase (file-name-nondirectory filename))))
+
+;;; Given a string FN, return a similar name which is a valid VMS filename.
+;;; This is used to avoid invalid auto save file names.
+(defun make-valid-file-name (fn)
+  (setq fn (copy-sequence fn))
+  (let ((dot nil) (indx 0) (len (length fn)) chr)
+    (while (< indx len)
+      (setq chr (aref fn indx))
+      (cond
+       ((eq chr ?.) (if dot (aset fn indx ?_) (setq dot t)))
+       ((not (or (and (>= chr ?a) (<= chr ?z)) (and (>= chr ?A) (<= chr ?Z))
+                (and (>= chr ?0) (<= chr ?9))
+                (eq chr ?$) (eq chr ?_) (and (eq chr ?-) (> indx 0))))
+       (aset fn indx ?_)))
+      (setq indx (1+ indx))))
+  fn)
+
+(define-obsolete-function-alias 'make-legal-file-name 'make-valid-file-name 
"23.1")
+
+;;; Auto save filesnames start with _$ and end with $.
+
+(defun make-auto-save-file-name ()
+  "Return file name to use for auto-saves of current buffer.
+This function does not consider `auto-save-visited-file-name';
+the caller should check that before calling this function.
+This is a separate function so that your `.emacs' file or the site's
+`site-init.el' can redefine it.
+See also `auto-save-file-name-p'."
+  (if buffer-file-name
+      (concat (file-name-directory buffer-file-name)
+             "_$"
+             (file-name-nondirectory buffer-file-name)
+             "$")
+    (expand-file-name (concat "_$_" (make-valid-file-name (buffer-name)) 
"$"))))
+
+(defun auto-save-file-name-p (filename)
+  "Return t if FILENAME can be yielded by `make-auto-save-file-name'.
+FILENAME should lack slashes.
+This is a separate function so that your `.emacs' file or the site's
+`site-init.el' can redefine it."
+  (string-match "^_\\$.*\\$" filename))
+
+;;;
+;;; This goes along with kepteditor.com which defines these logicals
+;;; If EMACS_COMMAND_ARGS is defined, it supersedes EMACS_FILE_NAME,
+;;;   which is probably set up incorrectly anyway.
+;;; The function command-line-again is a kludge, but it does the job.
+;;;
+(defun vms-suspend-resume-hook ()
+  "When resuming suspended Emacs, check for file to be found.
+If the logical name `EMACS_FILE_NAME' is defined, `find-file' that file."
+  (let ((file (vms-system-info "LOGICAL" "EMACS_FILE_NAME"))
+       (args (vms-system-info "LOGICAL" "EMACS_COMMAND_ARGS"))
+       (line (vms-system-info "LOGICAL" "EMACS_FILE_LINE")))
+    (if (not args)
+       (if file
+           (progn (find-file file)
+                  (if line (goto-line (string-to-number line)))))
+      (cd (file-name-directory file))
+      (vms-command-line-again))))
+
+(setq suspend-resume-hook 'vms-suspend-resume-hook)
+
+(defun vms-suspend-hook ()
+  "Don't allow suspending if logical name `DONT_SUSPEND_EMACS' is defined."
+  (if (vms-system-info "LOGICAL" "DONT_SUSPEND_EMACS")
+      (error "Can't suspend this emacs"))
+  nil)
+
+(setq suspend-hook 'vms-suspend-hook)
+
+;;;
+;;; A kludge that allows reprocessing of the command line.  This is mostly
+;;;   to allow a spawned VMS mail process to do something reasonable when
+;;;   used in conjunction with the modifications to sysdep.c that allow
+;;;   Emacs to attach to a "foster" parent.
+;;;
+(defun vms-command-line-again ()
+  "Reprocess command line arguments.  VMS specific.
+Command line arguments are initialized from the logical EMACS_COMMAND_ARGS
+which is defined by kepteditor.com.  On VMS this allows attaching to a
+spawned Emacs and doing things like \"emacs -l myfile.el -f doit\""
+  (let* ((args (downcase (vms-system-info "LOGICAL" "EMACS_COMMAND_ARGS")))
+        (command-line-args (list "emacs"))
+        (beg 0)
+        (end 0)
+        (len (length args))
+        this-char)
+    (if args
+       (progn
+;;; replace non-printable stuff with spaces
+         (while (< beg (length args))
+           (if (or (> 33 (setq this-char (aref args beg)))
+                   (< 127 this-char))
+               (aset args beg 32))
+           (setq beg (1+ beg)))
+         (setq beg (1- (length args)))
+         (while (= 32 (aref args beg)) (setq beg (1- beg)))
+         (setq args (substring args 0 (1+ beg)))
+         (setq beg 0)
+;;; now start parsing args
+         (while (< beg (length args))
+           (while (and (< beg (length args))
+                       (or (> 33 (setq this-char (aref args beg)))
+                           (< 127 this-char))
+                       (setq beg (1+ beg))))
+           (setq end (1+ beg))
+           (while (and (< end (length args))
+                       (< 32 (setq this-char (aref args end)))
+                       (> 127 this-char))
+             (setq end (1+ end)))
+           (setq command-line-args (append
+                                    command-line-args
+                                    (list (substring args beg end))))
+           (setq beg (1+ end)))
+         (command-line)))))
+
+(defun vms-read-directory (dirname switches buffer)
+  (save-excursion
+    (set-buffer buffer)
+    (subprocess-command-to-buffer
+     (concat "DIRECTORY " switches " " dirname)
+     buffer)
+    (goto-char (point-min))
+    ;; Remove all the trailing blanks.
+    (while (search-forward " \n")
+      (forward-char -1)
+      (delete-horizontal-space))
+    (goto-char (point-min))))
+
+(setq dired-listing-switches
+      "/SIZE/DATE/OWNER/WIDTH=(FILENAME=32,SIZE=5)")
+
+(setq print-region-function
+      (lambda (start end command ign1 ign2 ign3 &rest switches)
+        (write-region start end "sys$login:delete-me.txt")
+        (send-command-to-subprocess
+         1
+         (concat command
+                 " sys$login:delete-me.txt/name=\"GNUprintbuffer\" "
+                 (mapconcat 'identity switches " "))
+         nil nil nil)))
+
+;;;
+;;; Fuctions for using Emacs as a VMS Mail editor
+;;;
+(autoload 'vms-pmail-setup "vms-pmail"
+  "Set up file assuming use by VMS Mail utility.
+The buffer is put into text-mode, auto-save is turned off and the
+following bindings are established.
+
+\\[vms-pmail-save-and-exit]    vms-pmail-save-and-exit
+\\[vms-pmail-abort]    vms-pmail-abort
+
+All other Emacs commands are still available."
+  t)
+
+;;;
+;;; Filename handling in the minibuffer
+;;;
+(defun vms-magic-right-square-brace ()
+  "\
+Insert a right square brace, but do other things first depending on context.
+During filename completion, when point is at the end of the line and the
+character before is not a right square brace, do one of three things before
+inserting the brace:
+ - If there are already two left square braces preceding, do nothing special.
+ - If there is a previous right-square-brace, convert it to dot.
+ - If the character before is dot, delete it.
+Additionally, if the preceding chars are right-square-brace followed by
+either \"-\" or \"..\", strip one level of directory hierarchy."
+  (interactive)
+  (when (and minibuffer-completing-file-name
+            (= (point) (point-max))
+            (not (= 93 (char-before))))
+    (cond
+     ;; Avoid clobbering: user:[one.path][another.path
+     ((search-backward "[" (field-beginning) t 2))
+     ((search-backward "]" (field-beginning) t)
+      (delete-char 1)
+      (insert ".")
+      (goto-char (point-max)))
+     ((= ?. (char-before))
+      (delete-char -1)))
+    (goto-char (point-max))
+    (let ((specs '(".." "-"))
+         (pmax (point-max)))
+      (while specs
+       (let* ((up (car specs))
+              (len (length up))
+              (cut (- (point) len)))
+         (when (and (< (1+ len) pmax)
+                    (= ?. (char-before cut))
+                    (string= up (buffer-substring cut (point))))
+           (delete-char (- (1+ len)))
+           (while (not (let ((c (char-before)))
+                         (or (= ?. c) (= 91 c))))
+             (delete-char -1))
+           (when (= ?. (char-before)) (delete-char -1))
+           (setq specs nil)))
+       (setq specs (cdr specs)))))
+  (insert "]"))
+
+(defun vms-magic-colon ()
+  "\
+Insert a colon, but do other things first depending on context.
+During filename completion, when point is at the end of the line
+and the line contains a right square brace, remove all characters
+from the beginning of the line up to and including such brace.
+This enables one to type a new filespec without having to delete
+the old one."
+  (interactive)
+  (when (and minibuffer-completing-file-name
+            (= (point) (point-max))
+             (search-backward "]" (field-beginning) t))
+    (delete-region (field-beginning) (1+ (point)))
+    (goto-char (point-max)))
+  (insert ":"))
+
+(let ((m minibuffer-local-completion-map))
+  (define-key m "]" 'vms-magic-right-square-brace)
+  (define-key m "/" 'vms-magic-right-square-brace)
+  (define-key m ":" 'vms-magic-colon))
+
+;; arch-tag: c178494e-2c37-4d02-99b7-e47e615656cf
+;;; vms-patch.el ends here