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emacs/lisp/wdired.el
Thien-Thi Nguyen 9139583918 (wdired-change-to-wdired-mode, wdired-change-to-dired-mode): 
Throw error if buffer is not in Dired and Wdired mode, respectively.
2006-07-28 21:00:15 +00:00

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;;; wdired.el --- Rename files editing their names in dired buffers
;; Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
;; Filename: wdired.el
;; Author: Juan León Lahoz García <juanleon1@gmail.com>
;; Version: 2.0
;; Keywords: dired, environment, files, renaming
;; 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.
;; This program 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; wdired.el (the "w" is for writable) provides an alternative way of
;; renaming files.
;;
;; Have you ever wished to use C-x r t (string-rectangle), M-%
;; (query-replace), M-c (capitalize-word), etc... to change the name of
;; the files in a "dired" buffer? Now you can do this. All the power
;; of Emacs commands are available to renaming files!
;;
;; This package provides a function that makes the filenames of a a
;; dired buffer editable, by changing the buffer mode (which inhibits
;; all of the commands of dired mode). Here you can edit the names of
;; one or more files and directories, and when you press C-c C-c, the
;; renaming takes effect and you are back to dired mode.
;;
;; Another things you can do with WDired:
;;
;; - To move files to another directory (by typing their path,
;; absolute or relative, as a part of the new filename).
;;
;; - To change the target of symbolic links.
;;
;; - To change the permission bits of the filenames (in systems with a
;; working unix-alike `dired-chmod-program'). See and customize the
;; variable `wdired-allow-to-change-permissions'. To change a single
;; char (toggling between its two more usual values) you can press
;; the space bar over it or left-click the mouse. To set any char to
;; an specific value (this includes the SUID, SGID and STI bits) you
;; can use the key labeled as the letter you want. Please note that
;; permissions of the links cannot be changed in that way, because
;; the change would affect to their targets, and this would not be
;; WYSIWYG :-).
;;
;; - To mark files for deletion, by deleting their whole filename.
;;; Installation:
;; Add this file (byte-compiling it is recommended) to your load-path.
;; Then add one of these set of lines (or similar ones) to your config:
;;
;; This is the easy way:
;;
;; (require 'wdired)
;; (define-key dired-mode-map "r" 'wdired-change-to-wdired-mode)
;;
;; This is the recommended way for faster Emacs startup time and lower
;; memory consumption:
;;
;; (autoload 'wdired-change-to-wdired-mode "wdired")
;; (eval-after-load "dired"
;; '(lambda ()
;; (define-key dired-mode-map "r" 'wdired-change-to-wdired-mode)
;; (define-key dired-mode-map
;; [menu-bar immediate wdired-change-to-wdired-mode]
;; '("Edit File Names" . wdired-change-to-wdired-mode))))
;;
;; Type "M-x customize-group RET wdired" if you want to make changes
;; to the default behavior.
;;; Usage:
;; Then, you can start editing the names of the files by typing "r"
;; (or whatever key you choose, or M-x wdired-change-to-wdired-mode).
;; Use C-c C-c when finished or C-c C-k to abort. You can use also the
;; menu options: in dired mode, "Edit File Names" under "Immediate".
;; While editing the names, a new submenu "WDired" is available at top
;; level. You can customize the behavior of this package from this
;; menu.
;;; Change Log:
;; Google is your friend (previous versions with complete changelogs
;; were posted to gnu.emacs.sources)
;;; Code:
(defvar dired-backup-overwrite) ; Only in Emacs 20.x this is a custom var
(eval-when-compile (require 'cl))
(require 'dired)
(autoload 'dired-do-create-files-regexp "dired-aux")
(autoload 'dired-call-process "dired-aux")
(defgroup wdired nil
"Mode to rename files by editing their names in dired buffers."
:group 'dired)
(defcustom wdired-use-interactive-rename nil
"If non-nil, WDired requires confirmation before actually renaming files.
If nil, WDired doesn't require confirmation to change the file names,
and the variable `wdired-confirm-overwrite' controls whether it is ok
to overwrite files without asking."
:type 'boolean
:group 'wdired)
(defcustom wdired-confirm-overwrite t
"If nil the renames can overwrite files without asking.
This variable has no effect at all if `wdired-use-interactive-rename'
is not nil."
:type 'boolean
:group 'wdired)
(defcustom wdired-use-dired-vertical-movement nil
"If t, the \"up\" and \"down\" movement works as in Dired mode.
That is, always move the point to the beginning of the filename at line.
If `sometimes, only move to the beginning of filename if the point is
before it, and `track-eol' is honored. This behavior is very handy
when editing several filenames.
If nil, \"up\" and \"down\" movement is done as in any other buffer."
:type '(choice (const :tag "As in any other mode" nil)
(const :tag "Smart cursor placement" sometimes)
(other :tag "As in dired mode" t))
:group 'wdired)
(defcustom wdired-allow-to-redirect-links t
"If non-nil, the target of the symbolic links are editable.
In systems without symbolic links support, this variable has no effect
at all."
:type 'boolean
:group 'wdired)
(defcustom wdired-allow-to-change-permissions nil
"If non-nil, the permissions bits of the files are editable.
If t, to change a single bit, put the cursor over it and press the
space bar, or left click over it. You can also hit the letter you want
to set: if this value is allowed, the character in the buffer will be
changed. Anyway, the point is advanced one position, so, for example,
you can keep the <x> key pressed to give execution permissions to
everybody to that file.
If `advanced, the bits are freely editable. You can use
`string-rectangle', `query-replace', etc. You can put any value (even
newlines), but if you want your changes to be useful, you better put a
intelligible value.
Anyway, the real change of the permissions is done by the external
program `dired-chmod-program', which must exist."
:type '(choice (const :tag "Not allowed" nil)
(const :tag "Toggle/set bits" t)
(other :tag "Bits freely editable" advanced))
:group 'wdired)
(defvar wdired-mode-map
(let ((map (make-sparse-keymap)))
(define-key map "\C-x\C-s" 'wdired-finish-edit)
(define-key map "\C-c\C-c" 'wdired-finish-edit)
(define-key map "\C-c\C-k" 'wdired-abort-changes)
(define-key map "\C-c\C-[" 'wdired-abort-changes)
(define-key map "\C-m" 'ignore)
(define-key map "\C-j" 'ignore)
(define-key map "\C-o" 'ignore)
(define-key map [up] 'wdired-previous-line)
(define-key map "\C-p" 'wdired-previous-line)
(define-key map [down] 'wdired-next-line)
(define-key map "\C-n" 'wdired-next-line)
(define-key map [menu-bar wdired]
(cons "WDired" (make-sparse-keymap "WDired")))
(define-key map [menu-bar wdired wdired-customize]
'("Options" . wdired-customize))
(define-key map [menu-bar wdired dashes]
'("--"))
(define-key map [menu-bar wdired wdired-abort-changes]
'(menu-item "Abort Changes" wdired-abort-changes
:help "Abort changes and return to dired mode"))
(define-key map [menu-bar wdired wdired-finish-edit]
'("Commit Changes" . wdired-finish-edit))
(define-key map [remap upcase-word] 'wdired-upcase-word)
(define-key map [remap capitalize-word] 'wdired-capitalize-word)
(define-key map [remap downcase-word] 'wdired-downcase-word)
map))
(defvar wdired-mode-hook nil
"Hooks run when changing to WDired mode.")
;; Local variables (put here to avoid compilation gripes)
(defvar wdired-col-perm) ;; Column where the permission bits start
(defvar wdired-old-content)
(defvar wdired-old-point)
(defun wdired-mode ()
"\\<wdired-mode-map>File Names Editing mode.
Press \\[wdired-finish-edit] to make the changes to take effect
and exit. To abort the edit, use \\[wdired-abort-changes].
In this mode you can edit the names of the files, the target of
the links and the permission bits of the files. You can use
\\[customize-group] RET wdired to customize WDired behavior.
The only editable texts in a WDired buffer are filenames,
symbolic link targets, and filenames permission."
(interactive)
(error "This mode can be enabled only by `wdired-change-to-wdired-mode'"))
(put 'wdired-mode 'mode-class 'special)
;;;###autoload
(defun wdired-change-to-wdired-mode ()
"Put a dired buffer in a mode in which filenames are editable.
\\<wdired-mode-map>
This mode allows the user to change the names of the files, and after
typing \\[wdired-finish-edit] Emacs renames the files and directories
in disk.
See `wdired-mode'."
(interactive)
(or (eq major-mode 'dired-mode)
(error "Not a Dired buffer"))
(set (make-local-variable 'wdired-old-content)
(buffer-substring (point-min) (point-max)))
(set (make-local-variable 'wdired-old-point) (point))
(set (make-local-variable 'query-replace-skip-read-only) t)
(use-local-map wdired-mode-map)
(force-mode-line-update)
(setq buffer-read-only nil)
(dired-unadvertise default-directory)
(add-hook 'kill-buffer-hook 'wdired-check-kill-buffer nil t)
(setq major-mode 'wdired-mode)
(setq mode-name "Editable Dired")
(setq revert-buffer-function 'wdired-revert)
;; I temp disable undo for performance: since I'm going to clear the
;; undo list, it can save more than a 9% of time with big
;; directories because setting properties modify the undo-list.
(buffer-disable-undo)
(wdired-preprocess-files)
(if wdired-allow-to-change-permissions
(wdired-preprocess-perms))
(if (and wdired-allow-to-redirect-links (fboundp 'make-symbolic-link))
(wdired-preprocess-symlinks))
(buffer-enable-undo) ; Performance hack. See above.
(set-buffer-modified-p nil)
(setq buffer-undo-list nil)
(run-mode-hooks 'wdired-mode-hook)
(message "%s" (substitute-command-keys
"Press \\[wdired-finish-edit] when finished \
or \\[wdired-abort-changes] to abort changes")))
;; Protect the buffer so only the filenames can be changed, and put
;; properties so filenames (old and new) can be easily found.
(defun wdired-preprocess-files ()
(put-text-property 1 2 'front-sticky t)
(save-excursion
(goto-char (point-min))
(let ((b-protection (point))
filename)
(while (not (eobp))
(setq filename (dired-get-filename nil t))
(when (and filename
(not (member (file-name-nondirectory filename) '("." ".."))))
(dired-move-to-filename)
(put-text-property (- (point) 2) (1- (point)) 'old-name filename)
(put-text-property b-protection (1- (point)) 'read-only t)
(setq b-protection (dired-move-to-end-of-filename t)))
(put-text-property (point) (1+ (point)) 'end-name t)
(forward-line))
(put-text-property b-protection (point-max) 'read-only t))))
;; This code is a copy of some dired-get-filename lines.
(defsubst wdired-normalize-filename (file)
(setq file
;; FIXME: shouldn't we check for a `b' argument or somesuch before
;; doing such unquoting? --Stef
(read (concat
"\"" (replace-regexp-in-string
"\\([^\\]\\|\\`\\)\"" "\\1\\\\\"" file)
"\"")))
(and file buffer-file-coding-system
(not file-name-coding-system)
(not default-file-name-coding-system)
(setq file (encode-coding-string file buffer-file-coding-system)))
file)
(defun wdired-get-filename (&optional no-dir old)
"Return the filename at line.
Similar to `dired-get-filename' but it doesn't rely on regexps. It
relies on WDired buffer's properties. Optional arg NO-DIR with value
non-nil means don't include directory. Optional arg OLD with value
non-nil means return old filename."
;; FIXME: Use dired-get-filename's new properties.
(let* ((end (line-end-position))
(beg (next-single-property-change
(line-beginning-position) 'old-name nil end)))
(unless (eq beg end)
(let ((file
(if old
(get-text-property beg 'old-name)
(wdired-normalize-filename
(buffer-substring-no-properties
(+ 2 beg) (next-single-property-change (1+ beg) 'end-name))))))
(if (or no-dir old)
file
(and file (> (length file) 0)
(concat (dired-current-directory) file)))))))
(defun wdired-change-to-dired-mode ()
"Change the mode back to dired."
(or (eq major-mode 'wdired-mode)
(error "Not a Wdired buffer"))
(let ((inhibit-read-only t))
(remove-text-properties (point-min) (point-max)
'(read-only nil local-map nil)))
(put-text-property 1 2 'front-sticky nil)
(use-local-map dired-mode-map)
(force-mode-line-update)
(setq buffer-read-only t)
(setq major-mode 'dired-mode)
(setq mode-name "Dired")
(dired-advertise)
(remove-hook 'kill-buffer-hook 'wdired-check-kill-buffer t)
(set (make-local-variable 'revert-buffer-function) 'dired-revert))
(defun wdired-abort-changes ()
"Abort changes and return to dired mode."
(interactive)
(let ((inhibit-read-only t))
(erase-buffer)
(insert wdired-old-content)
(goto-char wdired-old-point))
(wdired-change-to-dired-mode)
(set-buffer-modified-p nil)
(setq buffer-undo-list nil)
(message "Changes aborted"))
(defun wdired-finish-edit ()
"Actually rename files based on your editing in the Dired buffer."
(interactive)
(wdired-change-to-dired-mode)
(let ((overwrite (or (not wdired-confirm-overwrite) 1))
(changes nil)
(files-deleted nil)
(errors 0)
file-ori file-new tmp-value)
(save-excursion
(if (and wdired-allow-to-redirect-links
(fboundp 'make-symbolic-link))
(progn
(setq tmp-value (wdired-do-symlink-changes))
(setq errors (cdr tmp-value))
(setq changes (car tmp-value))))
(if (and wdired-allow-to-change-permissions
(boundp 'wdired-col-perm)) ; could have been changed
(progn
(setq tmp-value (wdired-do-perm-changes))
(setq errors (+ errors (cdr tmp-value)))
(setq changes (or changes (car tmp-value)))))
(goto-char (point-max))
(while (not (bobp))
(setq file-ori (wdired-get-filename nil t))
(if file-ori
(setq file-new (wdired-get-filename)))
(if (and file-ori (not (equal file-new file-ori)))
(progn
(setq changes t)
(if (not file-new) ;empty filename!
(setq files-deleted (cons file-ori files-deleted))
(progn
(setq file-new (substitute-in-file-name file-new))
(if wdired-use-interactive-rename
(wdired-search-and-rename file-ori file-new)
;; If dired-rename-file autoloads dired-aux while
;; dired-backup-overwrite is locally bound,
;; dired-backup-overwrite won't be initialized.
;; So we must ensure dired-aux is loaded.
(require 'dired-aux)
(condition-case err
(let ((dired-backup-overwrite nil))
(dired-rename-file file-ori file-new
overwrite))
(error
(setq errors (1+ errors))
(dired-log (concat "Rename `" file-ori "' to `"
file-new "' failed:\n%s\n")
err))))))))
(forward-line -1)))
(if changes
(revert-buffer) ;The "revert" is necessary to re-sort the buffer
(let ((inhibit-read-only t))
(remove-text-properties (point-min) (point-max)
'(old-name nil end-name nil old-link nil
end-link nil end-perm nil
old-perm nil perm-changed nil))
(message "(No changes to be performed)")))
(if files-deleted
(wdired-flag-for-deletion files-deleted))
(if (> errors 0)
(dired-log-summary (format "%d rename actions failed" errors) nil)))
(set-buffer-modified-p nil)
(setq buffer-undo-list nil))
;; Rename a file, searching it in a modified dired buffer, in order
;; to be able to use `dired-do-create-files-regexp' and get its
;; "benefits".
(defun wdired-search-and-rename (filename-ori filename-new)
(save-excursion
(goto-char (point-max))
(forward-line -1)
(let ((exit-while nil)
curr-filename)
(while (not exit-while)
(setq curr-filename (wdired-get-filename))
(if (and curr-filename
(equal (substitute-in-file-name curr-filename) filename-new))
(progn
(setq exit-while t)
(let ((inhibit-read-only t))
(dired-move-to-filename)
(search-forward (wdired-get-filename t) nil t)
(replace-match (file-name-nondirectory filename-ori) t t))
(dired-do-create-files-regexp
(function dired-rename-file)
"Move" 1 ".*" filename-new nil t))
(progn
(forward-line -1)
(beginning-of-line)
(setq exit-while (= 1 (point)))))))))
;; marks a list of files for deletion
(defun wdired-flag-for-deletion (filenames-ori)
(save-excursion
(goto-char (point-min))
(while (not (eobp))
(if (member (dired-get-filename nil t) filenames-ori)
(dired-flag-file-deletion 1)
(forward-line)))))
(defun wdired-customize ()
"Customize WDired options."
(interactive)
(customize-apropos "wdired" 'groups))
(defun wdired-revert (&optional arg noconfirm)
"Discard changes in the buffer and update it based on changes on disk.
Optional arguments are ignored."
(wdired-change-to-dired-mode)
(revert-buffer)
(wdired-change-to-wdired-mode))
(defun wdired-check-kill-buffer ()
;; FIXME: Can't we use the normal mechanism for that? --Stef
(if (and
(buffer-modified-p)
(not (y-or-n-p "Buffer changed. Discard changes and kill buffer? ")))
(error nil)))
(defun wdired-next-line (arg)
"Move down lines then position at filename or the current column.
See `wdired-use-dired-vertical-movement'. Optional prefix ARG
says how many lines to move; default is one line."
(interactive "p")
(next-line arg)
(if (or (eq wdired-use-dired-vertical-movement t)
(and wdired-use-dired-vertical-movement
(< (current-column)
(save-excursion (dired-move-to-filename)
(current-column)))))
(dired-move-to-filename)))
(defun wdired-previous-line (arg)
"Move up lines then position at filename or the current column.
See `wdired-use-dired-vertical-movement'. Optional prefix ARG
says how many lines to move; default is one line."
(interactive "p")
(previous-line arg)
(if (or (eq wdired-use-dired-vertical-movement t)
(and wdired-use-dired-vertical-movement
(< (current-column)
(save-excursion (dired-move-to-filename)
(current-column)))))
(dired-move-to-filename)))
;; Put the needed properties to allow the user to change links' targets
(defun wdired-preprocess-symlinks ()
(let ((inhibit-read-only t))
(save-excursion
(goto-char (point-min))
(while (not (eobp))
(if (looking-at dired-re-sym)
(progn
(re-search-forward " -> \\(.*\\)$")
(put-text-property (- (match-beginning 1) 2)
(1- (match-beginning 1)) 'old-link
(match-string-no-properties 1))
(put-text-property (match-end 1) (1+ (match-end 1)) 'end-link t)
(put-text-property (1- (match-beginning 1))
(match-end 1) 'read-only nil)))
(forward-line)
(beginning-of-line)))))
(defun wdired-get-previous-link (&optional old move)
"Return the next symlink target.
If OLD, return the old target. If MOVE, move point before it."
(let ((beg (previous-single-property-change (point) 'old-link nil)))
(when beg
(let ((target
(if old
(get-text-property (1- beg) 'old-link)
(buffer-substring-no-properties
(1+ beg) (next-single-property-change beg 'end-link)))))
(if move (goto-char (1- beg)))
(and target (wdired-normalize-filename target))))))
;; Perform the changes in the target of the changed links.
(defun wdired-do-symlink-changes ()
(let ((changes nil)
(errors 0)
link-to-ori link-to-new link-from)
(goto-char (point-max))
(while (setq link-to-new (wdired-get-previous-link))
(setq link-to-ori (wdired-get-previous-link t t))
(setq link-from (wdired-get-filename nil t))
(unless (equal link-to-new link-to-ori)
(setq changes t)
(if (equal link-to-new "") ;empty filename!
(setq link-to-new "/dev/null"))
(condition-case err
(progn
(delete-file link-from)
(make-symbolic-link
(substitute-in-file-name link-to-new) link-from))
(error
(setq errors (1+ errors))
(dired-log (concat "Link `" link-from "' to `"
link-to-new "' failed:\n%s\n")
err)))))
(cons changes errors)))
;; Perform a "case command" skipping read-only words.
(defun wdired-xcase-word (command arg)
(if (< arg 0)
(funcall command arg)
(while (> arg 0)
(condition-case err
(progn
(funcall command 1)
(setq arg (1- arg)))
(error
(if (not (forward-word 1))
(setq arg 0)))))))
(defun wdired-downcase-word (arg)
"WDired version of `downcase-word'.
Like original function but it skips read-only words."
(interactive "p")
(wdired-xcase-word 'downcase-word arg))
(defun wdired-upcase-word (arg)
"WDired version of `upcase-word'.
Like original function but it skips read-only words."
(interactive "p")
(wdired-xcase-word 'upcase-word arg))
(defun wdired-capitalize-word (arg)
"WDired version of `capitalize-word'.
Like original function but it skips read-only words."
(interactive "p")
(wdired-xcase-word 'capitalize-word arg))
;; The following code deals with changing the access bits (or
;; permissions) of the files.
(defvar wdired-perm-mode-map
(let ((map (make-sparse-keymap)))
(define-key map " " 'wdired-toggle-bit)
(define-key map "r" 'wdired-set-bit)
(define-key map "w" 'wdired-set-bit)
(define-key map "x" 'wdired-set-bit)
(define-key map "-" 'wdired-set-bit)
(define-key map "S" 'wdired-set-bit)
(define-key map "s" 'wdired-set-bit)
(define-key map "T" 'wdired-set-bit)
(define-key map "t" 'wdired-set-bit)
(define-key map "s" 'wdired-set-bit)
(define-key map "l" 'wdired-set-bit)
(define-key map [down-mouse-1] 'wdired-mouse-toggle-bit)
map))
;; Put a local-map to the permission bits of the files, and store the
;; original name and permissions as a property
(defun wdired-preprocess-perms ()
(let ((inhibit-read-only t)
filename)
(set (make-local-variable 'wdired-col-perm) nil)
(save-excursion
(goto-char (point-min))
(while (not (eobp))
(if (and (not (looking-at dired-re-sym))
(setq filename (wdired-get-filename)))
(progn
(re-search-forward dired-re-perms)
(or wdired-col-perm
(setq wdired-col-perm (- (current-column) 9)))
(if (eq wdired-allow-to-change-permissions 'advanced)
(put-text-property (match-beginning 0) (match-end 0)
'read-only nil)
(put-text-property (1+ (match-beginning 0)) (match-end 0)
'keymap wdired-perm-mode-map))
(put-text-property (match-end 0) (1+ (match-end 0)) 'end-perm t)
(put-text-property (match-beginning 0) (1+ (match-beginning 0))
'old-perm (match-string-no-properties 0))))
(forward-line)
(beginning-of-line)))))
(defun wdired-perm-allowed-in-pos (char pos)
(cond
((= char ?-) t)
((= char ?r) (= (% pos 3) 0))
((= char ?w) (= (% pos 3) 1))
((= char ?x) (= (% pos 3) 2))
((memq char '(?s ?S)) (memq pos '(2 5)))
((memq char '(?t ?T)) (= pos 8))
((= char ?l) (= pos 5))))
(defun wdired-set-bit ()
"Set a permission bit character."
(interactive)
(if (wdired-perm-allowed-in-pos last-command-char
(- (current-column) wdired-col-perm))
(let ((new-bit (char-to-string last-command-char))
(inhibit-read-only t)
(pos-prop (- (point) (- (current-column) wdired-col-perm))))
(put-text-property 0 1 'keymap wdired-perm-mode-map new-bit)
(put-text-property 0 1 'read-only t new-bit)
(insert new-bit)
(delete-char 1)
(put-text-property pos-prop (1- pos-prop) 'perm-changed t))
(forward-char 1)))
(defun wdired-toggle-bit ()
"Toggle the permission bit at point."
(interactive)
(let ((inhibit-read-only t)
(new-bit (cond
((not (eq (char-after (point)) ?-)) "-")
((= (% (- (current-column) wdired-col-perm) 3) 0) "r")
((= (% (- (current-column) wdired-col-perm) 3) 1) "w")
(t "x")))
(pos-prop (- (point) (- (current-column) wdired-col-perm))))
(put-text-property 0 1 'keymap wdired-perm-mode-map new-bit)
(put-text-property 0 1 'read-only t new-bit)
(insert new-bit)
(delete-char 1)
(put-text-property pos-prop (1- pos-prop) 'perm-changed t)))
(defun wdired-mouse-toggle-bit (event)
"Toggle the permission bit that was left clicked."
(interactive "e")
(mouse-set-point event)
(wdired-toggle-bit))
;; Allowed chars for 4000 bit are Ss in position 3
;; Allowed chars for 2000 bit are Ssl in position 6
;; Allowed chars for 1000 bit are Tt in position 9
(defun wdired-perms-to-number (perms)
(+
(if (= (elt perms 1) ?-) 0 400)
(if (= (elt perms 2) ?-) 0 200)
(case (elt perms 3)
(?- 0)
(?S 4000)
(?s 4100)
(t 100))
(if (= (elt perms 4) ?-) 0 40)
(if (= (elt perms 5) ?-) 0 20)
(case (elt perms 6)
(?- 0)
(?S 2000)
(?s 2010)
(t 10))
(if (= (elt perms 7) ?-) 0 4)
(if (= (elt perms 8) ?-) 0 2)
(case (elt perms 9)
(?- 0)
(?T 1000)
(?t 1001)
(t 1))))
;; Perform the changes in the permissions of the files that have
;; changed.
(defun wdired-do-perm-changes ()
(let ((changes nil)
(errors 0)
(prop-wanted (if (eq wdired-allow-to-change-permissions 'advanced)
'old-perm 'perm-changed))
filename perms-ori perms-new perm-tmp)
(goto-char (next-single-property-change (point-min) prop-wanted
nil (point-max)))
(while (not (eobp))
(setq perms-ori (get-text-property (point) 'old-perm))
(setq perms-new (buffer-substring-no-properties
(point) (next-single-property-change (point) 'end-perm)))
(unless (equal perms-ori perms-new)
(setq changes t)
(setq filename (wdired-get-filename nil t))
(if (= (length perms-new) 10)
(progn
(setq perm-tmp
(int-to-string (wdired-perms-to-number perms-new)))
(unless (equal 0 (dired-call-process dired-chmod-program
t perm-tmp filename))
(setq errors (1+ errors))
(dired-log (concat dired-chmod-program " " perm-tmp
" `" filename "' failed\n\n"))))
(setq errors (1+ errors))
(dired-log (concat "Cannot parse permission `" perms-new
"' for file `" filename "'\n\n"))))
(goto-char (next-single-property-change (1+ (point)) prop-wanted
nil (point-max))))
(cons changes errors)))
(provide 'wdired)
;; Local Variables:
;; coding: latin-1
;; byte-compile-dynamic: t
;; End:
;; arch-tag: bc00902e-526f-4305-bc7f-8862a559184f
;;; wdired.el ends here
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