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+;;; filecache.el --- Find files using a pre-loaded cache
+;;
+;; Author:  Peter Breton
+;; Created: Sun Nov 10 1996
+;; Version: $Id: filecache.el,v 1.13 1997/02/07 22:27:51 pbreton Exp $
+;; Keywords: 
+;; Time-stamp: <97/02/07 17:26:54 peter>
+;;
+;; Copyright (C) Peter Breton Thu Dec 12 1996
+;;
+;; This 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.
+;;
+;; filecache.el 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+;;
+;; LCD Archive Entry:
+;; filecache.el|Peter Breton|[email protected]|
+;; Find files using a pre-loaded cache|
+;; Thu Dec 12 1996|1.0|~/misc/filecache.el.gz|
+;;
+;; Purpose:
+;; 
+;; Find files using a pre-loaded cache
+;;
+;;; Commentary:
+;;
+;; The file-cache package is an attempt to make it easy to locate files
+;; by name, without having to remember exactly where they are located.
+;; This is very handy when working with source trees. You can also add
+;; frequently used files to the cache to create a hotlist effect.
+;; The cache can be used with any interactive command which takes a
+;; filename as an argument.
+;;
+;; It is worth noting that this package works best when most of the files
+;; in the cache have unique names, or (if they have the same name) exist in
+;; only a few directories. The worst case is many files all with
+;; the same name and in different directories, for example a big source tree
+;; with a Makefile in each directory. In such a case, you should probably
+;; use an alternate strategy to find the files.
+;;
+;; ADDING FILES TO THE CACHE:
+;;
+;; Use the following functions to add items to the file cache:
+;; 
+;;   * `file-cache-add-file': Adds a single file to the cache
+;;
+;;   * `file-cache-add-file-list': Adds a list of files to the cache
+;;
+;; The following functions use the regular expressions in
+;; `file-cache-delete-regexps' to eliminate unwanted files:
+;;   
+;;   * `file-cache-add-directory': Adds the files in a directory to the
+;;     cache. You can also specify a regular expression to match the files
+;;     which should be added.
+;;
+;;   * `file-cache-add-directory-list': Same as above, but acts on a list
+;;     of directories. You can use `load-path', `exec-path' and the like.
+;;
+;;   * `file-cache-add-directory-using-find': Uses the `find' command to
+;;     add a directory tree to the cache.
+;;
+;;   * `file-cache-add-directory-using-locate': Uses the `locate' command to
+;;     add files matching a pattern to the cache.
+;;
+;; Use the function `file-cache-clear-cache' to remove all items from the
+;; cache. There are a number of `file-cache-delete' functions provided
+;; as well, but in general it is probably better to not worry too much
+;; about extra files in the cache.
+;;
+;; The most convenient way to initialize the cache is with an
+;; `eval-after-load' function, as noted in the INSTALLATION section.
+;;
+;; FINDING FILES USING THE CACHE:
+;;
+;; You can use the file-cache with any function that expects a filename as
+;; an argument. For example:
+;;
+;; 1) Invoke a function which expects a filename as an argument:
+;;    M-x find-file
+;;
+;; 2) Begin typing a file name.
+;;
+;; 3) Invoke `file-cache-minibuffer-complete' (bound by default to
+;; C-TAB) to complete on the filename using the cache.
+;;
+;; 4) When you have found a unique completion, the minibuffer contents
+;; will change to the full name of that file.
+;; 
+;; If there are a number of directories which contain the completion,
+;; invoking `file-cache-minibuffer-complete' repeatedly will cycle through
+;; them.
+;;
+;; 5) You can then edit the minibuffer contents, or press RETURN.
+;;
+;; It is much easier to simply try it than trying to explain it :)
+;;
+;;; INSTALLATION
+;;
+;; Insert the following into your .emacs:
+;;
+;; (autoload 'file-cache-minibuffer-complete "filecache" nil t)
+;;
+;; For maximum utility, you should probably define an `eval-after-load'
+;; form which loads your favorite files:
+;;
+;;      (eval-after-load 
+;;       "filecache"
+;;       '(progn
+;; 	    (message "Loading file cache...")
+;; 	    (file-cache-add-directory-using-find "~/projects")
+;;	    (file-cache-add-directory-list load-path)
+;;	    (file-cache-add-directory "~/")
+;;	    (file-cache-add-file-list (list "~/foo/bar" "~/baz/bar"))
+;; 	   ))
+;;
+;; If you clear and reload the cache frequently, it is probably easiest
+;; to put your initializations in a function:
+;;
+;;   (eval-after-load 
+;;     "filecache"
+;;      '(my-file-cache-initialize))
+;;        
+;;   (defun my-file-cache-initialize ()
+;;      (interactive)
+;; 	(message "Loading file cache...")
+;; 	(file-cache-add-directory-using-find "~/projects")
+;;	(file-cache-add-directory-list load-path)
+;;	(file-cache-add-directory "~/")
+;;	(file-cache-add-file-list (list "~/foo/bar" "~/baz/bar"))
+;;   ))
+;;
+;; Of course, you can still add files to the cache afterwards, via
+;; Lisp functions.
+;;
+;; RELATED WORK:
+;; 
+;; This package is a distant relative of Noah Friedman's fff utilities.
+;; Our goal is pretty similar, but the implementation strategies are
+;; different.
+;;
+;;; Change log:
+;; $Log: filecache.el,v $
+;; Revision 1.13  1997/02/07 22:27:51  pbreton
+;; Keybindings use autoload cookies instead of variable
+;;
+;; Revision 1.12  1997/02/07 22:02:29  pbreton
+;; Added small changes suggested by RMS:
+;;   Revamped the doc strings
+;;   Added keybindings (using `file-cache-default-minibuffer-key' variable)
+;;
+;; Revision 1.11  1997/02/01 16:44:47  pbreton
+;; Changed `file-cache-directory-name' function. Instead of using a
+;; completing-read, it cycles through the directory list.
+;;
+;; Eliminated bug where file-cache-file-name was called twice per completion.
+;;
+;; Revision 1.10  1997/01/26 05:44:24  pbreton
+;; Added file-cache-delete functions
+;; Added file-cache-completions-buffer variable
+;; Added file-cache-completions-keymap variable
+;; Changed file-cache-completion-setup-function to use
+;;   file-cache-completions-keymap
+;; Added file-cache-choose-completion and file-cache-mouse-choose-completion.
+;;   These rely on a patch to 'simple.el'
+;; Added file-cache-debug-read-from-minibuffer function
+;;
+;; Revision 1.9  1997/01/17 17:54:24  pbreton
+;; File names are no longer case-insensitive; this was tolerable on NT but
+;; not on Unix. Instead, file-cache-minibuffer-complete checks to see if the
+;; last command was itself, and if the same string is in the minibuffer. If so,
+;; this string is used for completion.
+;;
+;; Added some functions to delete from the file-cache
+;;
+;; Completing-read of directories requires temporary binding of
+;; enable-recursive-minibuffers variable.
+;;
+;; Revision 1.8  1997/01/17 14:01:08  pbreton
+;; Changed file-cache-minibuffer-complete so that it operates in the
+;; minibuffer instead of as a recursive minibuffer call.
+;;
+;; File-cache-alist now expects a filename and a list of directories (there
+;; should be at least one). If the list has only one element, that element
+;; is used; if it has multiple directories, the user is prompted to choose
+;; one.
+;;
+;; File names in the cache are now canonicalized to lowercase, to resolve a
+;; problem which occurs when the cache has files like README and readme.
+;;
+;; Removed a lot of the extra completion functions which weren't used.
+;;
+;; Revision 1.7  1996/12/29 15:48:28  pbreton
+;; Added functions:
+;;   `file-cache-minibuffer-complete-using-suffix'
+;;   `file-cache-minibuffer-complete-with-directory-filter'
+;;   `file-cache-minibuffer-complete-with-filename-filter'
+;; Added documentation for these functions
+;;
+;; Revision 1.6  1996/12/24 20:27:56  pbreton
+;; Added predicate functions to `file-cache-minibuffer-complete'
+;;
+;; Revision 1.5  1996/12/14 18:05:11  pbreton
+;; Fixed uniquify bug by using `member' instead of `memq'
+;; Made file-cache-add-* prompts more descriptive
+;; More documentation
+;;
+;; Revision 1.4  1996/12/13 14:42:37  pbreton
+;; Removed `file-cache-top-directory' variable
+;; Changed file-cache-initialize to file-cache-add-from-file-cache-buffer
+;; Regexp to match files in file-cache-buffer is now a variable
+;;
+;; Revision 1.3  1996/12/12 06:01:27  peter
+;; Added `file-cache-add-file' and `file-cache-add-file-list' functions
+;;
+;; Revision 1.2  1996/12/12 05:47:49  peter
+;; Fixed uniquifying bug
+;; Added directory functions
+;; `file-cache-find-file' now uses file-cache-file-name
+;; `file-cache-minibuffer-complete' handles string completion correctly.
+;;   It also prepends `file-cache-minibuffer-prompt' to the normal prompt
+;;
+;; Revision 1.1  1996/11/26 12:12:43  peter
+;; Initial revision
+;;
+;;; Code:
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Variables
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; User-modifiable variables
+(defvar file-cache-filter-regexps 
+  (list "~$" "\\.o$" "\\.exe$" "\\.a$" "\\.elc$" ",v$" "\\.output$" 
+	"\\.$" "#$")
+  "*List of regular expressions used as filters by the file cache.
+File names which match these expressions will not be added to the cache.
+Note that the functions `file-cache-add-file' and `file-cache-add-file-list' 
+do not use this variable.")
+
+(defvar file-cache-find-command "find"
+  "*External program used by `file-cache-add-directory-using-find'.")
+
+(defvar file-cache-locate-command "locate"
+  "*External program used by `file-cache-add-directory-using-locate'.")
+
+;; Minibuffer messages
+(defvar file-cache-no-match-message " [File Cache: No match]"
+  "Message to display when there is no completion.")
+
+(defvar file-cache-sole-match-message " [File Cache: sole completion]"
+  "Message to display when there is only one completion.")
+
+(defvar file-cache-non-unique-message " [File Cache: complete but not unique]"
+  "Message to display when there is a non-unique completion.")
+
+(defvar file-cache-multiple-directory-message nil)
+
+;; Internal variables
+;; This should be named *Completions* because that's what the function
+;; switch-to-completions in simple.el expects
+(defvar file-cache-completions-buffer "*Completions*"
+  "Buffer to display completions when using the file cache.")
+
+(defvar file-cache-buffer "*File Cache*"  
+  "Buffer to hold the cache of file names.")
+
+(defvar file-cache-buffer-default-regexp "^.+$"
+  "Regexp to match files in `file-cache-buffer'.")
+
+(defvar file-cache-last-completion nil)
+
+(defvar file-cache-alist nil
+  "Internal data structure to hold cache of file names.")
+
+(defvar file-cache-completions-keymap nil
+  "Keymap for file cache completions buffer.")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Functions to add files to the cache
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defun file-cache-add-directory (directory &optional regexp)
+  "Add DIRECTORY to the file cache.
+If the optional REGEXP argument is non-nil, only files which match it will 
+be added to the cache."
+  (interactive "DAdd files from directory: ") 
+  (let* ((dir       (expand-file-name directory))
+	 (dir-files (directory-files dir t regexp))
+	 )
+    ;; Filter out files we don't want to see
+    (mapcar
+     '(lambda (file)
+	(mapcar 
+	 '(lambda (regexp)
+	    (if (string-match regexp file)
+		(setq dir-files (delq file dir-files))))
+	 file-cache-filter-regexps))
+     dir-files)
+    (file-cache-add-file-list dir-files)))
+
+(defun file-cache-add-directory-list (directory-list &optional regexp)
+  "Add DIRECTORY-LIST (a list of directory names) to the file cache.
+If the optional REGEXP argument is non-nil, only files which match it 
+will be added to the cache. Note that the REGEXP is applied to the files 
+in each directory, not to the directory list itself."
+  (interactive "XAdd files from directory list: ")
+  (mapcar 
+   '(lambda (dir) (file-cache-add-directory dir regexp))
+   directory-list))
+
+(defun file-cache-add-file-list  (file-list)
+  "Add FILE-LIST (a list of files names) to the file cache."
+  (interactive "XFile List: ")
+  (mapcar 'file-cache-add-file file-list))
+
+;; Workhorse function
+(defun file-cache-add-file (file)
+  "Add FILE to the file cache."
+  (interactive "fAdd File: ")
+  (let* ((file-name (file-name-nondirectory file))
+	 (dir-name  (file-name-directory    file))
+	 (the-entry (assoc file-name file-cache-alist))
+	)
+    ;; Does the entry exist already?
+    (if the-entry
+	(if (or (and (stringp (cdr the-entry))
+		     (string= dir-name (cdr the-entry)))
+		(and (listp (cdr the-entry))
+		     (member dir-name (cdr the-entry))))
+	    nil
+	  (setcdr the-entry (append (list dir-name) (cdr the-entry)))
+	  )
+      ;; If not, add it to the cache
+      (setq file-cache-alist
+	    (cons (cons file-name (list dir-name)) 
+		  file-cache-alist)))
+    ))
+
+(defun file-cache-add-directory-using-find (directory)
+  "Use the `find' command to add files to the file cache.
+Find is run in DIRECTORY."
+  (interactive "DAdd files under directory: ")
+  (let ((dir (expand-file-name directory)))
+    (set-buffer (get-buffer-create file-cache-buffer))
+    (erase-buffer)
+    (call-process file-cache-find-command nil 
+		  (get-buffer file-cache-buffer) nil
+		  dir "-name" 
+		  (if (memq system-type 
+			    (list 'windows-nt 'ms-dos)) "'*'" "*")
+		  "-print")
+    (file-cache-add-from-file-cache-buffer)))
+
+(defun file-cache-add-directory-using-locate (string)
+  "Use the `locate' command to add files to the file cache.
+STRING is passed as an argument to the locate command."
+  (interactive "sAdd files using locate string: ")
+  (set-buffer (get-buffer-create file-cache-buffer))
+  (erase-buffer)
+  (call-process file-cache-locate-command nil 
+		(get-buffer file-cache-buffer) nil
+		string)
+  (file-cache-add-from-file-cache-buffer))
+
+(defun file-cache-add-from-file-cache-buffer (&optional regexp)
+  "Add any entries found in the file cache buffer.
+Each entry matches the regular expression `file-cache-buffer-default-regexp'
+or the optional REGEXP argument."
+  (set-buffer file-cache-buffer)
+  (mapcar 
+   (function (lambda (elt)
+	       (goto-char (point-min))
+	       (delete-matching-lines elt)))
+   file-cache-filter-regexps)
+  (goto-char (point-min))
+  (let ((full-filename))
+    (while (re-search-forward
+	    (or regexp file-cache-buffer-default-regexp) 
+	    (point-max) t)
+      (setq full-filename (buffer-substring-no-properties
+		      (match-beginning 0) (match-end 0))) 
+      (file-cache-add-file full-filename))))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Functions to delete from the cache
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defun file-cache-clear-cache ()
+  "Clear the file cache."
+  (interactive)
+  (setq file-cache-alist nil))
+
+;; This clears *all* files with the given name
+(defun file-cache-delete-file (file)
+  "Delete FILE from the file cache."
+  (interactive
+   (list (completing-read "Delete file from cache: " file-cache-alist)))
+  (setq file-cache-alist 
+	(delq (assoc file file-cache-alist) file-cache-alist)))
+
+(defun file-cache-delete-file-list (file-list)
+  "Delete FILE-LIST (a list of files) from the file cache."
+  (interactive "XFile List: ")
+  (mapcar 'file-cache-delete-file file-list))
+
+(defun file-cache-delete-file-regexp (regexp)
+  "Delete files matching REGEXP from the file cache."
+  (interactive "sRegexp: ")
+  (let ((delete-list))
+    (mapcar '(lambda (elt) 
+	       (and (string-match regexp (car elt))
+		    (setq delete-list (cons (car elt) delete-list))))
+	    file-cache-alist)
+    (file-cache-delete-file-list delete-list)
+    (message "Deleted %d files from file cache" (length delete-list))))
+
+(defun file-cache-delete-directory (directory)
+  "Delete DIRECTORY from the file cache."
+  (interactive "DDelete directory from file cache: ")
+  (let ((dir (expand-file-name directory))
+	(result 0))
+    (mapcar 
+     '(lambda (entry) 
+	(if (file-cache-do-delete-directory dir entry)
+	    (setq result (1+ result))))
+     file-cache-alist)
+    (if (zerop result)
+	(error "No entries containing %s found in cache" directory)
+      (message "Deleted %d entries" result))))
+
+(defun file-cache-do-delete-directory (dir entry)
+  (let ((directory-list (cdr entry))
+	(directory (file-cache-canonical-directory dir))
+	)
+    (and (member directory directory-list)
+	 (if (equal 1 (length directory-list))
+	     (setq file-cache-alist 
+		   (delq entry file-cache-alist))
+	   (setcdr entry (delete directory directory-list)))
+	 )
+    ))
+
+(defun file-cache-delete-directory-list (directory-list)
+  "Delete DIRECTORY-LIST (a list of directories) from the file cache."
+  (interactive "XDirectory List: ")
+  (mapcar 'file-cache-delete-directory directory-list))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Utility functions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; Returns the name of a directory for a file in the cache
+(defun file-cache-directory-name  (file)
+  (let* ((directory-list (cdr (assoc file file-cache-alist)))
+	 (len            (length directory-list))
+	 (directory)
+	 (num)
+	 )
+    (if (not (listp directory-list))
+	(error "Unknown type in file-cache-alist for key %s" file))
+    (cond 
+     ;; Single element
+     ((eq 1 len)
+      (setq directory (elt directory-list 0)))
+     ;; No elements
+     ((eq 0 len)
+      (error "No directory found for key %s" file))
+     ;; Multiple elements
+     (t
+      (let* ((minibuffer-dir (file-name-directory (buffer-string)))
+	     (dir-list       (member minibuffer-dir directory-list))
+	     )
+	(setq directory
+	      ;; If the directory is in the list, return the next element
+	      ;; Otherwise, return the first element
+	      (if dir-list 
+		  (or (elt directory-list 
+			   (setq num (1+ (- len (length dir-list)))))
+		      (elt directory-list (setq num 0)))
+		(elt directory-list (setq num 0))))
+	)
+      )
+     )
+    ;; If there were multiple directories, set up a minibuffer message
+    (setq file-cache-multiple-directory-message
+	  (and num (format " [%d of %d]" (1+ num) len)))
+    directory))
+
+;; Returns the name of a file in the cache
+(defun file-cache-file-name  (file)
+  (let ((directory (file-cache-directory-name file)))
+    (concat directory file)))
+ 
+;; Return a canonical directory for comparison purposes.
+;; Such a directory ends with a forward slash.
+(defun file-cache-canonical-directory (dir)
+  (let ((directory dir))
+    (if (not (char-equal ?/ (string-to-char (substring directory -1))))
+	(concat directory "/")
+      directory)))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Minibuffer functions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;;;###autoload
+(defun file-cache-minibuffer-complete ()
+  "Complete a filename in the minibuffer using a preloaded cache."
+  (interactive) 
+  (let* 
+      (
+       (completion-ignore-case nil)
+       (case-fold-search       nil)
+       (string            (file-name-nondirectory (buffer-string)))
+       (completion-string (try-completion string file-cache-alist))
+       (completion-list)
+       (len)
+       (file-cache-string)
+       )
+    (cond 
+     ;; If it's the longest match, insert it
+     ((stringp completion-string)
+      ;; If we've already inserted a unique string, see if the user
+      ;; wants to use that one
+      (if (and (string= string completion-string)
+	       (assoc string file-cache-alist))
+	  (if (and (eq last-command this-command)
+		   (string= file-cache-last-completion completion-string))
+	      (progn 
+		(erase-buffer)
+		(insert-string (file-cache-file-name completion-string))  
+		(setq file-cache-last-completion nil)
+		)
+	    (file-cache-temp-minibuffer-message file-cache-non-unique-message)
+	    (setq file-cache-last-completion string)
+	    )
+	(setq file-cache-last-completion string)
+	(setq completion-list (all-completions string file-cache-alist)
+	      len             (length completion-list))
+	(if (> len 1)
+	    (progn
+	      (goto-char (point-max))
+	      (insert-string 
+	       (substring completion-string (length string)))
+	      ;; Add our own setup function to the Completions Buffer
+	      (let ((completion-setup-hook
+		   (reverse 
+		    (append (list 'file-cache-completion-setup-function)
+			    completion-setup-hook)))
+		    )
+		(with-output-to-temp-buffer file-cache-completions-buffer
+		  (display-completion-list completion-list))
+		)
+	      )
+	  (setq file-cache-string (file-cache-file-name completion-string))
+	  (if (string= file-cache-string (buffer-string))
+	      (file-cache-temp-minibuffer-message file-cache-sole-match-message)
+	    (erase-buffer)
+	    (insert-string file-cache-string)
+	    (if file-cache-multiple-directory-message
+		(file-cache-temp-minibuffer-message 
+		 file-cache-multiple-directory-message)))
+	  )))
+     
+     ;; If it's the only match, replace the original contents
+     ((eq completion-string t)
+      (setq file-cache-string (file-cache-file-name string))
+      (if (string= file-cache-string (buffer-string))
+	  (file-cache-temp-minibuffer-message file-cache-sole-match-message)
+	(erase-buffer)
+	(insert-string file-cache-string)
+	(if file-cache-multiple-directory-message
+	    (file-cache-temp-minibuffer-message 
+	     file-cache-multiple-directory-message))
+      ))
+     
+     ;; No match
+     ((eq completion-string nil)
+      (file-cache-temp-minibuffer-message file-cache-no-match-message))
+     )
+))
+
+;; Lifted from "complete.el"
+(defun file-cache-temp-minibuffer-message (msg)
+  "A Lisp version of `temp_minibuffer_message' from minibuf.c."
+  (let ((savemax (point-max)))
+    (save-excursion
+      (goto-char (point-max))
+      (insert msg))
+    (let ((inhibit-quit t))
+      (sit-for 2)
+      (delete-region savemax (point-max))
+      (if quit-flag
+	  (setq quit-flag nil
+		unread-command-events (list 7))))))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Completion functions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defun file-cache-completion-setup-function  ()
+  (set-buffer file-cache-completions-buffer)
+
+  (if file-cache-completions-keymap
+      nil
+    (setq file-cache-completions-keymap 
+	  (copy-keymap completion-list-mode-map))
+    (define-key file-cache-completions-keymap [mouse-2] 
+      'file-cache-mouse-choose-completion) 
+    (define-key file-cache-completions-keymap "\C-m"    
+      'file-cache-choose-completion))
+
+    (use-local-map file-cache-completions-keymap)
+    )
+
+(defun file-cache-choose-completion  ()
+  "Choose a completion in the `*Completions*' buffer."
+  (interactive)
+  (let ((completion-no-auto-exit t))
+    (choose-completion)
+    (select-window (active-minibuffer-window))
+    (file-cache-minibuffer-complete)
+    )
+  )
+
+(defun file-cache-mouse-choose-completion  (event)
+  "Choose a completion with the mouse."
+  (interactive "e")
+  (let ((completion-no-auto-exit t))
+    (mouse-choose-completion event)
+    (select-window (active-minibuffer-window))
+    (file-cache-minibuffer-complete)
+    )
+  )
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Debugging functions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defun file-cache-debug-read-from-minibuffer (file)
+  "Debugging function."
+  (interactive 
+   (list (completing-read "File Cache: " file-cache-alist)))
+  (message "%s" (assoc file file-cache-alist))
+  )
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Keybindings
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;;;###autoload (define-key minibuffer-local-completion-map [C-tab] 'file-cache-minibuffer-complete)
+;;;###autoload (define-key minibuffer-local-map [C-tab] 'file-cache-minibuffer-complete)
+;;;###autoload (define-key minibuffer-local-must-match-map [C-tab] 'file-cache-minibuffer-complete)
+
+(provide 'filecache)
+
+;;; filecache.el ends here