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Diffstat (limited to 'lisp/saveplace.el')
| -rw-r--r-- | lisp/saveplace.el | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/lisp/saveplace.el b/lisp/saveplace.el deleted file mode 100644 index 364e766dcb0..00000000000 --- a/lisp/saveplace.el +++ /dev/null @@ -1,229 +0,0 @@ -;;; saveplace.el --- automatically save place in files. - -;; Copyright (C) 1993, 1994 Free Software Foundation, Inc. - -;; Author: Karl Fogel <kfogel@cs.oberlin.edu> -;; Maintainer: FSF -;; Created: July, 1993 -;; Keywords: bookmarks, placeholders - -;; 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 2, 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; see the file COPYING. If not, write to the -;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, -;; Boston, MA 02111-1307, USA. - -;;; Commentary: - -;; Automatically save place in files, so that visiting them later -;; (even during a different Emacs session) automatically moves point -;; to the saved position, when the file is first found. Uses the -;; value of buffer-local variable save-place to determine whether to -;; save position or not. -;; -;; Thanks to Stefan Schoef, who sent a patch with the -;; `save-place-version-control' stuff in it. - -;;; Code: - -;; this is what I was using during testing: -;; (define-key ctl-x-map "p" 'toggle-save-place) - -(defvar save-place-alist nil - "Alist of saved places to go back to when revisiting files. -Each element looks like (FILENAME . POSITION); -visiting file FILENAME goes automatically to position POSITION -rather than the beginning of the buffer. -This alist is saved between Emacs sessions.") - -(defvar save-place nil - "*Non-nil means automatically save place in each file. -This means when you visit a file, point goes to the last place -where it was when you previously visited the same file. -This variable is automatically buffer-local. - -If you wish your place in any file to always be automatically saved, -simply put this in your `~/.emacs' file: - -\(setq-default save-place t\)") - -(make-variable-buffer-local 'save-place) - -(defvar save-place-file (convert-standard-filename "~/.emacs-places") - "*Name of the file that records `save-place-alist' value.") - -(defvar save-place-version-control 'nospecial - "*Controls whether to make numbered backups of master save-place file. -It can have four values: t, nil, `never', and `nospecial'. The first -three have the same meaning that they do for the variable -`version-control', and the final value `nospecial' means just use the -value of `version-control'.") - -(defvar save-place-loaded nil - "Non-nil means that the `save-place-file' has been loaded.") - -(defvar save-place-limit nil - "Maximum number of entries to retain in the list; nil means no limit.") - -(defun toggle-save-place (&optional parg) - "Toggle whether to save your place in this file between sessions. -If this mode is enabled, point is recorded when you kill the buffer -or exit Emacs. Visiting this file again will go to that position, -even in a later Emacs session. - -If called with a prefix arg, the mode is enabled if and only if -the argument is positive. - -To save places automatically in all files, put this in your `.emacs' file: - -\(setq-default save-place t\)" - (interactive "P") - (if (not buffer-file-name) - (message "Buffer `%s' not visiting a file" (buffer-name)) - (if (and save-place (or (not parg) (<= parg 0))) - (progn - (message "No place will be saved in this file") - (setq save-place nil)) - (message "Place will be saved") - (setq save-place t)))) - -(defun save-place-to-alist () - ;; put filename and point in a cons box and then cons that onto the - ;; front of the save-place-alist, if save-place is non-nil. - ;; Otherwise, just delete that file from the alist. - ;; first check to make sure alist has been loaded in from the master - ;; file. If not, do so, then feel free to modify the alist. It - ;; will be saved again when Emacs is killed. - (or save-place-loaded (load-save-place-alist-from-file)) - (if buffer-file-name - (progn - (let ((cell (assoc buffer-file-name save-place-alist))) - (if cell - (setq save-place-alist (delq cell save-place-alist)))) - (if save-place - (setq save-place-alist - (cons (cons buffer-file-name - (if (not (eq major-mode 'hexl-mode)) - (point) - (1+ (hexl-current-address)))) - save-place-alist)))))) - -(defun save-place-alist-to-file () - (let ((file (expand-file-name save-place-file))) - (save-excursion - (message "Saving places to %s..." file) - (set-buffer (get-buffer-create " *Saved Places*")) - (delete-region (point-min) (point-max)) - (if (file-readable-p file) - (insert-file-contents file)) - (delete-region (point-min) (point-max)) - (goto-char (point-min)) - (print save-place-alist (current-buffer)) - (let ((version-control - (cond - ((null save-place-version-control) nil) - ((eq 'never save-place-version-control) 'never) - ((eq 'nospecial save-place-version-control) version-control) - (t - t)))) - (write-file file) - (kill-buffer (current-buffer)) - (message "Saving places to %s...done" file))))) - -(defun load-save-place-alist-from-file () - (if (not save-place-loaded) - (progn - (setq save-place-loaded t) - (let ((file (expand-file-name save-place-file))) - ;; make sure that the alist does not get overwritten, and then - ;; load it if it exists: - (if (file-readable-p file) - (save-excursion - (message "Loading places from %s..." save-place-file) - ;; don't want to use find-file because we have been - ;; adding hooks to it. - (set-buffer (get-buffer-create " *Saved Places*")) - (delete-region (point-min) (point-max)) - (insert-file-contents file) - (goto-char (point-min)) - (setq save-place-alist - (car (read-from-string - (buffer-substring (point-min) (point-max))))) - - ;; If there is a limit, and we're over it, then we'll - ;; have to truncate the end of the list: - (if save-place-limit - (if (<= save-place-limit 0) - ;; Zero gets special cased. I'm not thrilled - ;; with this, but the loop for >= 1 is tight. - (setq save-place-alist nil) - ;; Else the limit is >= 1, so enforce it by - ;; counting and then `setcdr'ing. - (let ((s save-place-alist) - (count 1)) - (while s - (if (>= count save-place-limit) - (setcdr s nil) - (setq count (1+ count))) - (setq s (cdr s)))))) - - (kill-buffer (current-buffer)) - (message "Loading places from %s...done" file) - t) - t) - nil)))) - -(defun save-places-to-alist () - ;; go through buffer-list, saving places to alist if save-place is - ;; non-nil, deleting them from alist if it is nil. - (let ((buf-list (buffer-list))) - (while buf-list - ;; put this into a save-excursion in case someone is counting on - ;; another function in kill-emacs-hook to act on the last buffer - ;; they were in: - (save-excursion - (set-buffer (car buf-list)) - ;; save-place checks buffer-file-name too, but we can avoid - ;; overhead of function call by checking here too. - (and buffer-file-name (save-place-to-alist)) - (setq buf-list (cdr buf-list)))))) - -(defun save-place-find-file-hook () - (or save-place-loaded (load-save-place-alist-from-file)) - (let ((cell (assoc buffer-file-name save-place-alist))) - (if cell - (progn - (or after-find-file-from-revert-buffer - (goto-char (cdr cell))) - ;; and make sure it will be saved again for later - (setq save-place t))))) - -(defun save-place-kill-emacs-hook () - ;; First update the alist. This loads the old save-place-file if nec. - (save-places-to-alist) - ;; Now save the alist in the file, if we have ever loaded the file - ;; (including just now). - (if save-place-loaded - (save-place-alist-to-file))) - -(add-hook 'find-file-hooks 'save-place-find-file-hook t) - -(add-hook 'kill-emacs-hook 'save-place-kill-emacs-hook) - -(add-hook 'kill-buffer-hook 'save-place-to-alist) - -(provide 'saveplace) ; why not... - -;;; saveplace.el ends here - |