;;; rfn-eshadow.el --- Highlight `shadowed' part of read-file-name input text
;;
-;; Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+;; Copyright (C) 2000, 2001, 2002, 2003, 2004,
+;; 2005 Free Software Foundation, Inc.
;;
;; Author: Miles Bader <miles@gnu.org>
-;; Keywords: convenience
+;; Keywords: convenience minibuffer
;; This file is part of GNU Emacs.
;; 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.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;
-;; Defines the mode `read-file-name-electric-shadow-mode'.
+;; Defines the mode `file-name-shadow-mode'.
;;
;; The `read-file-name' function passes its result through
;; `substitute-in-file-name', so any part of the string preceding
;; multiple slashes (or a drive indicator on MS-DOS/MS-Windows) is
;; ignored.
;;
-;; If `read-file-name-electric-shadow-mode' is active, any part of the
+;; If `file-name-shadow-mode' is active, any part of the
;; minibuffer text that would be ignored because of this is given the
-;; properties in `read-file-name-electric-shadow-properties', which may
+;; properties in `file-name-shadow-properties', which may
;; be used to make the ignored text invisible, dim, etc.
;;
\f
;;; Customization
-(defconst read-file-name-electric-shadow-properties-custom-type
+(defconst file-name-shadow-properties-custom-type
'(list
(checklist :inline t
(const :tag "Invisible"
:tag "Face"
:doc "Display shadowed part of filename using a different face"
(const :format "" face)
- (face :value read-file-name-electric-shadow))
+ (face :value file-name-shadow))
(list :inline t
:format "%t: %v%h"
:tag "Brackets"
(sexp :tag "Value")))))
;;;###autoload
-(defcustom read-file-name-electric-shadow-properties
- '(face read-file-name-electric-shadow field shadow)
+(defcustom file-name-shadow-properties
+ '(face file-name-shadow field shadow)
"Properties given to the `shadowed' part of a filename in the minibuffer.
-Only used when `read-file-name-electric-shadow-mode' is active.
-If emacs is not running under a window system,
-`read-file-name-electric-shadow-tty-properties' is used instead."
- :type read-file-name-electric-shadow-properties-custom-type
+Only used when `file-name-shadow-mode' is active.
+If Emacs is not running under a window system,
+`file-name-shadow-tty-properties' is used instead."
+ :type file-name-shadow-properties-custom-type
:group 'minibuffer)
;;;###autoload
-(defcustom read-file-name-electric-shadow-tty-properties
+(defcustom file-name-shadow-tty-properties
'(before-string "{" after-string "} " field shadow)
"Properties given to the `shadowed' part of a filename in the minibuffer.
-Only used when `read-file-name-electric-shadow-mode' is active and emacs
+Only used when `file-name-shadow-mode' is active and emacs
is not running under a window-system; if emacs is running under a window
-system, `read-file-name-electric-shadow-properties' is used instead."
- :type read-file-name-electric-shadow-properties-custom-type
+system, `file-name-shadow-properties' is used instead."
+ :type file-name-shadow-properties-custom-type
:group 'minibuffer)
-(defface read-file-name-electric-shadow
- '((((background dark))
- :foreground "grey50")
- (t
- :foreground "grey70"))
- "Face used by `read-file-name-electric-shadow-mode' for the shadow."
+(defface file-name-shadow
+ '((t :inherit shadow))
+ "Face used by `file-name-shadow-mode' for the shadow."
:group 'minibuffer)
\f
;;; Internal variables
-;; Regexp to locate dividing point between shadow and real pathname
-(defconst rfn-eshadow-regexp
- (cond ((memq system-type '(ms-dos windows-nt))
- ;; This horrible regexp considers the following patterns as
- ;; starting an absolute pathname, when following a `/' or an `\':
- ;; L: / // ~ $ \\ \\\\
- "\\(.*[^/]+/+?\\|/*?\\|\\)\\(~\\|$[^$]\\|$\\'\\|[][\\^a-z]:\\|//?\\([^][\\^a-z/$~]\\|[^/$~][^:]\\|[^/$~]?\\'\\)\\)")
- (t
- ;; default is for unix-style filenames
- "\\(.*/\\)\\([/~]\\|$[^$]\\|$\\'\\)"))
- "Regular expression used to match shadowed filenames.
-There should be at least one regexp group; the end of the first one
-is used as the end of the shadowed portion of the filename.")
-
;; A list of minibuffers to which we've added a post-command-hook.
(defvar rfn-eshadow-frobbed-minibufs nil)
;; This function goes on minibuffer-setup-hook
(defun rfn-eshadow-setup-minibuffer ()
- "Set up a minibuffer for `read-file-name-electric-shadow-mode'.
+ "Set up a minibuffer for `file-name-shadow-mode'.
The prompt and initial input should already have been inserted."
(when minibuffer-completing-file-name
(setq rfn-eshadow-overlay
;; Give rfn-eshadow-overlay the user's props.
(let ((props
(if window-system
- read-file-name-electric-shadow-properties
- read-file-name-electric-shadow-tty-properties)))
+ file-name-shadow-properties
+ file-name-shadow-tty-properties)))
(while props
(overlay-put rfn-eshadow-overlay (pop props) (pop props))))
;; Turn on overlay evaporation so that we don't have to worry about
(add-to-list 'rfn-eshadow-frobbed-minibufs (current-buffer))
(add-hook 'post-command-hook #'rfn-eshadow-update-overlay nil t)))
+(defsubst rfn-eshadow-sifn-equal (goal pos)
+ (equal goal (condition-case nil
+ (substitute-in-file-name
+ (buffer-substring-no-properties pos (point-max)))
+ ;; `substitute-in-file-name' can fail on partial input.
+ (error nil))))
+
;; post-command-hook to update overlay
(defun rfn-eshadow-update-overlay ()
"Update `rfn-eshadow-overlay' to cover shadowed part of minibuffer input.
-This is intended to be used as a minibuffer post-command-hook for
-`read-file-name-electric-shadow-mode'; the minibuffer should have already
+This is intended to be used as a minibuffer `post-command-hook' for
+`file-name-shadow-mode'; the minibuffer should have already
been set up by `rfn-eshadow-setup-minibuffer'."
- ;; This is not really a correct implementation; it won't always do the
- ;; right thing in the presence of environment variables that
- ;; substitute-in-file-name would expand; currently it just assumes any
- ;; environment variable contains an absolute filename.
- (save-excursion
- (goto-char (minibuffer-prompt-end))
- ;; Update the overlay (which will evaporate if it's empty).
- (move-overlay rfn-eshadow-overlay
- (point)
- (if (looking-at rfn-eshadow-regexp)
- (match-end 1)
- (point)))))
-
+ (condition-case nil
+ (let ((goal (substitute-in-file-name (minibuffer-contents)))
+ (mid (overlay-end rfn-eshadow-overlay))
+ (start (minibuffer-prompt-end))
+ (end (point-max)))
+ (unless
+ ;; Catch the common case where the shadow does not need to move.
+ (and mid
+ (or (eq mid end)
+ (not (rfn-eshadow-sifn-equal goal (1+ mid))))
+ (or (eq mid start)
+ (rfn-eshadow-sifn-equal goal mid)))
+ ;; Binary search for the greatest position still equivalent to
+ ;; the whole.
+ (while (or (< (1+ start) end)
+ (if (and (< (1+ end) (point-max))
+ (rfn-eshadow-sifn-equal goal (1+ end)))
+ ;; (SIFN end) != goal, but (SIFN (1+end)) == goal,
+ ;; We've reached a discontinuity: this can happen
+ ;; e.g. if `end' point to "/:...".
+ (setq start (1+ end) end (point-max))))
+ (setq mid (/ (+ start end) 2))
+ (if (rfn-eshadow-sifn-equal goal mid)
+ (setq start mid)
+ (setq end mid)))
+ (move-overlay rfn-eshadow-overlay (minibuffer-prompt-end) start)))
+ ;; `substitute-in-file-name' can fail on partial input.
+ (error nil)))
\f
-;;; Note this definition must be at the end of the file, because
-;;; `define-minor-mode' actually calls the mode-function if the
-;;; associated variable is non-nil, which requires that all needed
-;;; functions be already defined. [This is arguably a bug in d-m-m]
;;;###autoload
-(define-minor-mode read-file-name-electric-shadow-mode
- "Toggle Read-File-Name Electric Shadow mode
-When active, any part of the a filename being read in the minibuffer
-that would be ignored because the result is passed through
-`substitute-in-file-name' is given the properties in
-`read-file-name-electric-shadow-properties', which can be used to make
-that portion dim, invisible, or otherwise less visually noticable.
+(define-minor-mode file-name-shadow-mode
+ "Toggle File-Name Shadow mode.
+When active, any part of a filename being read in the minibuffer
+that would be ignored (because the result is passed through
+`substitute-in-file-name') is given the properties in
+`file-name-shadow-properties', which can be used to make
+that portion dim, invisible, or otherwise less visually noticeable.
With prefix argument ARG, turn on if positive, otherwise off.
Returns non-nil if the new state is enabled."
:global t
+ :init-value t
:group 'minibuffer
- (if read-file-name-electric-shadow-mode
+ (if file-name-shadow-mode
;; Enable the mode
(add-hook 'minibuffer-setup-hook 'rfn-eshadow-setup-minibuffer)
;; Disable the mode
(provide 'rfn-eshadow)
+;; arch-tag: dcf70a52-0115-4ec2-b1e3-4f8d3541a888
;;; rfn-eshadow.el ends here