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[Emacs-diffs] Changes to emacs/lisp/vc.el,v


From: Eric S. Raymond
Subject: [Emacs-diffs] Changes to emacs/lisp/vc.el,v
Date: Sat, 03 May 2008 09:28:05 +0000

CVSROOT:        /sources/emacs
Module name:    emacs
Changes by:     Eric S. Raymond <esr>   08/05/03 09:28:04

Index: vc.el
===================================================================
RCS file: /sources/emacs/emacs/lisp/vc.el,v
retrieving revision 1.617
retrieving revision 1.618
diff -u -b -r1.617 -r1.618
--- vc.el       3 May 2008 07:39:17 -0000       1.617
+++ vc.el       3 May 2008 09:28:04 -0000       1.618
@@ -693,6 +693,11 @@
 (require 'tool-bar)
 (require 'ewoc)
 
+(eval-when-compile
+  (require 'cl)
+  (require 'dired)      ; for dired-map-over-marks macro
+  (require 'dired-aux))        ; for dired-kill-{line,tree}
+
 (unless (assoc 'vc-parent-buffer minor-mode-alist)
   (setq minor-mode-alist
        (cons '(vc-parent-buffer vc-parent-buffer-name)
@@ -709,6 +714,14 @@
   :type 'boolean
   :group 'vc)
 
+(defcustom vc-delete-logbuf-window t
+  "If non-nil, delete the *VC-log* buffer and window after each logical action.
+If nil, bury that buffer instead.
+This is most useful if you have multiple windows on a frame and would like to
+preserve the setting."
+  :type 'boolean
+  :group 'vc)
+
 (defcustom vc-initial-comment nil
   "If non-nil, prompt for initial comment when a file is registered."
   :type 'boolean
@@ -722,6 +735,11 @@
   :group 'vc
   :version "20.3")
 
+(defcustom vc-command-messages nil
+  "If non-nil, display run messages from back-end commands."
+  :type 'boolean
+  :group 'vc)
+
 (defcustom vc-checkin-switches nil
   "A string or list of strings specifying extra switches for checkin.
 These are passed to the checkin program by \\[vc-checkin]."
@@ -752,6 +770,24 @@
                         string))
   :group 'vc)
 
+(defcustom vc-dired-listing-switches "-al"
+  "Switches passed to `ls' for vc-dired.  MUST contain the `l' option."
+  :type 'string
+  :group 'vc
+  :version "21.1")
+
+(defcustom vc-dired-recurse t
+  "If non-nil, show directory trees recursively in VC Dired."
+  :type 'boolean
+  :group 'vc
+  :version "20.3")
+
+(defcustom vc-dired-terse-display t
+  "If non-nil, show only locked or locally modified files in VC Dired."
+  :type 'boolean
+  :group 'vc
+  :version "20.3")
+
 (defcustom vc-diff-switches nil
   "A string or list of strings specifying switches for diff under VC.
 When running diff under a given BACKEND, VC concatenates the values of
@@ -822,6 +858,12 @@
   :type 'hook
   :group 'vc)
 
+(defcustom vc-dir-mode-hook nil
+  "Normal hook run by `vc-dir-mode'.
+See `run-hooks'."
+  :type 'hook
+  :group 'vc)
+
 ;; Annotate customization
 (defcustom vc-annotate-color-map
   (if (and (tty-display-color-p) (<= (display-color-cells) 8))
@@ -965,8 +1007,12 @@
 Backends that offer asynchronous diffs should respect this variable
 in their implementation of vc-BACKEND-diff.")
 
+(defvar vc-log-fileset)
 (defvar vc-log-revision)
 
+(defvar vc-dired-mode nil)
+(make-variable-buffer-local 'vc-dired-mode)
+
 ;; File property caching
 
 (defun vc-clear-context ()
@@ -1028,6 +1074,121 @@
         ,@body
         (save-buffer)))))
 
+(defun vc-position-context (posn)
+  "Save a bit of the text around POSN in the current buffer.
+Used to help us find the corresponding position again later
+if markers are destroyed or corrupted."
+  ;; A lot of this was shamelessly lifted from Sebastian Kremer's
+  ;; rcs.el mode.
+  (list posn
+       (buffer-size)
+       (buffer-substring posn
+                         (min (point-max) (+ posn 100)))))
+
+(defun vc-find-position-by-context (context)
+  "Return the position of CONTEXT in the current buffer.
+If CONTEXT cannot be found, return nil."
+  (let ((context-string (nth 2 context)))
+    (if (equal "" context-string)
+       (point-max)
+      (save-excursion
+       (let ((diff (- (nth 1 context) (buffer-size))))
+         (when (< diff 0) (setq diff (- diff)))
+         (goto-char (nth 0 context))
+         (if (or (search-forward context-string nil t)
+                 ;; Can't use search-backward since the match may continue
+                 ;; after point.
+                 (progn (goto-char (- (point) diff (length context-string)))
+                        ;; goto-char doesn't signal an error at
+                        ;; beginning of buffer like backward-char would
+                        (search-forward context-string nil t)))
+             ;; to beginning of OSTRING
+             (- (point) (length context-string))))))))
+
+(defun vc-context-matches-p (posn context)
+  "Return t if POSN matches CONTEXT, nil otherwise."
+  (let* ((context-string (nth 2 context))
+        (len (length context-string))
+        (end (+ posn len)))
+    (if (> end (1+ (buffer-size)))
+       nil
+      (string= context-string (buffer-substring posn end)))))
+
+(defun vc-buffer-context ()
+  "Return a list (POINT-CONTEXT MARK-CONTEXT REPARSE).
+Used by `vc-restore-buffer-context' to later restore the context."
+  (let ((point-context (vc-position-context (point)))
+       ;; Use mark-marker to avoid confusion in transient-mark-mode.
+       (mark-context  (when (eq (marker-buffer (mark-marker)) (current-buffer))
+                        (vc-position-context (mark-marker))))
+       ;; Make the right thing happen in transient-mark-mode.
+       (mark-active nil)
+       ;; The new compilation code does not use compilation-error-list any
+       ;; more, so the code below is now ineffective and might as well
+       ;; be disabled.  -- Stef
+       ;; ;; We may want to reparse the compilation buffer after revert
+       ;; (reparse (and (boundp 'compilation-error-list) ;compile loaded
+       ;;            ;; Construct a list; each elt is nil or a buffer
+       ;;            ;; if that buffer is a compilation output buffer
+       ;;            ;; that contains markers into the current buffer.
+       ;;            (save-current-buffer
+       ;;              (mapcar (lambda (buffer)
+       ;;                        (set-buffer buffer)
+       ;;                        (let ((errors (or
+       ;;                                       compilation-old-error-list
+       ;;                                       compilation-error-list))
+       ;;                              (buffer-error-marked-p nil))
+       ;;                          (while (and (consp errors)
+       ;;                                      (not buffer-error-marked-p))
+       ;;                            (and (markerp (cdr (car errors)))
+       ;;                                 (eq buffer
+       ;;                                     (marker-buffer
+       ;;                                      (cdr (car errors))))
+       ;;                                 (setq buffer-error-marked-p t))
+       ;;                            (setq errors (cdr errors)))
+       ;;                          (if buffer-error-marked-p buffer)))
+       ;;                      (buffer-list)))))
+       (reparse nil))
+    (list point-context mark-context reparse)))
+
+(defun vc-restore-buffer-context (context)
+  "Restore point/mark, and reparse any affected compilation buffers.
+CONTEXT is that which `vc-buffer-context' returns."
+  (let ((point-context (nth 0 context))
+       (mark-context (nth 1 context))
+       ;; (reparse (nth 2 context))
+        )
+    ;; The new compilation code does not use compilation-error-list any
+    ;; more, so the code below is now ineffective and might as well
+    ;; be disabled.  -- Stef
+    ;; ;; Reparse affected compilation buffers.
+    ;; (while reparse
+    ;;   (if (car reparse)
+    ;;           (with-current-buffer (car reparse)
+    ;;             (let ((compilation-last-buffer (current-buffer)) ;select 
buffer
+    ;;                   ;; Record the position in the compilation buffer of
+    ;;                   ;; the last error next-error went to.
+    ;;                   (error-pos (marker-position
+    ;;                               (car (car-safe compilation-error-list)))))
+    ;;               ;; Reparse the error messages as far as they were parsed 
before.
+    ;;               (compile-reinitialize-errors '(4) compilation-parsing-end)
+    ;;               ;; Move the pointer up to find the error we were at before
+    ;;               ;; reparsing.  Now next-error should properly go to the 
next one.
+    ;;               (while (and compilation-error-list
+    ;;                           (/= error-pos (car (car 
compilation-error-list))))
+    ;;                 (setq compilation-error-list (cdr 
compilation-error-list))))))
+    ;;   (setq reparse (cdr reparse)))
+
+    ;; if necessary, restore point and mark
+    (if (not (vc-context-matches-p (point) point-context))
+       (let ((new-point (vc-find-position-by-context point-context)))
+         (when new-point (goto-char new-point))))
+    (and mark-active
+         mark-context
+         (not (vc-context-matches-p (mark) mark-context))
+         (let ((new-mark (vc-find-position-by-context mark-context)))
+           (when new-mark (set-mark new-mark))))))
+
 ;;; Code for deducing what fileset and backend to assume
 
 (defun vc-responsible-backend (file &optional register)
@@ -1205,6 +1366,8 @@
       (unless not-urgent
        (error "Aborted")))))
 
+(defvar vc-dired-window-configuration)
+
 (defun vc-compatible-state (p q)
   "Controls which states can be in the same commit."
   (or
@@ -1536,6 +1699,51 @@
     (let ((buffer (get-file-buffer file)))
       (vc-dir-mark-buffer-changed file))))
 
+
+(defun vc-start-entry (files rev comment initial-contents msg action &optional 
after-hook)
+  "Accept a comment for an operation on FILES revision REV.
+If COMMENT is nil, pop up a VC-log buffer, emit MSG, and set the
+action on close to ACTION.  If COMMENT is a string and
+INITIAL-CONTENTS is non-nil, then COMMENT is used as the initial
+contents of the log entry buffer.  If COMMENT is a string and
+INITIAL-CONTENTS is nil, do action immediately as if the user had
+entered COMMENT.  If COMMENT is t, also do action immediately with an
+empty comment.  Remember the file's buffer in `vc-parent-buffer'
+\(current one if no file).  AFTER-HOOK specifies the local value
+for `vc-log-after-operation-hook'."
+  (let ((parent
+         (if (or (eq major-mode 'vc-dired-mode) (eq major-mode 'vc-dir-mode))
+             ;; If we are called from VC dired, the parent buffer is
+             ;; the current buffer.
+             (current-buffer)
+           (if (and files (equal (length files) 1))
+               (get-file-buffer (car files))
+             (current-buffer)))))
+    (when vc-before-checkin-hook
+      (if files
+         (with-current-buffer parent
+           (run-hooks 'vc-before-checkin-hook))
+       (run-hooks 'vc-before-checkin-hook)))
+    (if (and comment (not initial-contents))
+       (set-buffer (get-buffer-create "*VC-log*"))
+      (pop-to-buffer (get-buffer-create "*VC-log*")))
+    (set (make-local-variable 'vc-parent-buffer) parent)
+    (set (make-local-variable 'vc-parent-buffer-name)
+        (concat " from " (buffer-name vc-parent-buffer)))
+    ;;(if file (vc-mode-line file))
+    (vc-log-edit files)
+    (make-local-variable 'vc-log-after-operation-hook)
+    (when after-hook
+      (setq vc-log-after-operation-hook after-hook))
+    (setq vc-log-operation action)
+    (setq vc-log-revision rev)
+    (when comment
+      (erase-buffer)
+      (when (stringp comment) (insert comment)))
+    (if (or (not comment) initial-contents)
+       (message "%s  Type C-c C-c when done" msg)
+      (vc-finish-logentry (eq comment t)))))
+
 (defun vc-checkout (file &optional writable rev)
   "Retrieve a copy of the revision REV of FILE.
 If WRITABLE is non-nil, make sure the retrieved file is writable.
@@ -1635,6 +1843,57 @@
      (message "Checking in %s...done" (vc-delistify files)))
    'vc-checkin-hook))
 
+(defun vc-finish-logentry (&optional nocomment)
+  "Complete the operation implied by the current log entry.
+Use the contents of the current buffer as a check-in or registration
+comment.  If the optional arg NOCOMMENT is non-nil, then don't check
+the buffer contents as a comment."
+  (interactive)
+  ;; Check and record the comment, if any.
+  (unless nocomment
+    (run-hooks 'vc-logentry-check-hook))
+  ;; Sync parent buffer in case the user modified it while editing the comment.
+  ;; But not if it is a vc-dired buffer.
+  (with-current-buffer vc-parent-buffer
+    (or vc-dired-mode (eq major-mode 'vc-dir-mode) (vc-buffer-sync)))
+  (unless vc-log-operation
+    (error "No log operation is pending"))
+  ;; save the parameters held in buffer-local variables
+  (let ((log-operation vc-log-operation)
+       (log-fileset vc-log-fileset)
+       (log-revision vc-log-revision)
+       (log-entry (buffer-string))
+       (after-hook vc-log-after-operation-hook)
+       (tmp-vc-parent-buffer vc-parent-buffer))
+    (pop-to-buffer vc-parent-buffer)
+    ;; OK, do it to it
+    (save-excursion
+      (funcall log-operation
+              log-fileset
+              log-revision
+              log-entry))
+    ;; Remove checkin window (after the checkin so that if that fails
+    ;; we don't zap the *VC-log* buffer and the typing therein).
+    ;; -- IMO this should be replaced with quit-window
+    (let ((logbuf (get-buffer "*VC-log*")))
+      (cond ((and logbuf vc-delete-logbuf-window)
+            (delete-windows-on logbuf (selected-frame))
+            ;; Kill buffer and delete any other dedicated windows/frames.
+            (kill-buffer logbuf))
+           (logbuf (pop-to-buffer "*VC-log*")
+                   (bury-buffer)
+                   (pop-to-buffer tmp-vc-parent-buffer))))
+    ;; Now make sure we see the expanded headers
+    (when log-fileset
+      (mapc
+       (lambda (file) (vc-resynch-buffer file vc-keep-workfiles t))
+       log-fileset))
+    (when vc-dired-mode
+      (dired-move-to-filename))
+    (when (eq major-mode 'vc-dir-mode)
+      (vc-dir-move-to-goal-column))
+    (run-hooks after-hook 'vc-finish-logentry-hook)))
+
 ;;; Additional entry points for examining version histories
 
 ;; (defun vc-default-diff-tree (backend dir rev1 rev2)
@@ -2020,7 +2279,140 @@
 ;;;###autoload
 (defalias 'vc-resolve-conflicts 'smerge-ediff)
 
-;; Hooks to the dired code
+;; The VC directory major mode.  Coopt Dired for this.
+;; All VC commands get mapped into logical equivalents.
+
+(defvar vc-dired-switches)
+(defvar vc-dired-terse-mode)
+
+(defvar vc-dired-mode-map
+  (let ((map (make-sparse-keymap))
+       (vmap (make-sparse-keymap)))
+    (define-key map "\C-xv" vmap)
+    (define-key map "v" vmap)
+    (set-keymap-parent vmap vc-prefix-map)
+    (define-key vmap "t" 'vc-dired-toggle-terse-mode)
+    map))
+
+(define-derived-mode vc-dired-mode dired-mode "Dired under "
+  "The major mode used in VC directory buffers.
+
+It works like Dired, but lists only files under version control, with
+the current VC state of each file being indicated in the place of the
+file's link count, owner, group and size.  Subdirectories are also
+listed, and you may insert them into the buffer as desired, like in
+Dired.
+
+All Dired commands operate normally, with the exception of `v', which
+is redefined as the version control prefix, so that you can type
+`vl', `v=' etc. to invoke `vc-print-log', `vc-diff', and the like on
+the file named in the current Dired buffer line.  `vv' invokes
+`vc-next-action' on this file, or on all files currently marked.
+There is a special command, `*l', to mark all files currently locked."
+  ;; define-derived-mode does it for us in Emacs-21, but not in Emacs-20.
+  ;; We do it here because dired might not be loaded yet
+  ;; when vc-dired-mode-map is initialized.
+  (set-keymap-parent vc-dired-mode-map dired-mode-map)
+  (add-hook 'dired-after-readin-hook 'vc-dired-hook nil t)
+  ;; The following is slightly modified from files.el,
+  ;; because file lines look a bit different in vc-dired-mode
+  ;; (the column before the date does not end in a digit).
+  ;; albinus: It should be done in the original declaration.  Problem
+  ;; is the optional empty state-info; otherwise ")" would be good
+  ;; enough as delimeter.
+  (set (make-local-variable 'directory-listing-before-filename-regexp)
+  (let* ((l "\\([A-Za-z]\\|[^\0-\177]\\)")
+         ;; In some locales, month abbreviations are as short as 2 letters,
+         ;; and they can be followed by ".".
+         (month (concat l l "+\\.?"))
+         (s " ")
+         (yyyy "[0-9][0-9][0-9][0-9]")
+         (dd "[ 0-3][0-9]")
+         (HH:MM "[ 0-2][0-9]:[0-5][0-9]")
+         (seconds "[0-6][0-9]\\([.,][0-9]+\\)?")
+         (zone "[-+][0-2][0-9][0-5][0-9]")
+         (iso-mm-dd "[01][0-9]-[0-3][0-9]")
+         (iso-time (concat HH:MM "\\(:" seconds "\\( ?" zone "\\)?\\)?"))
+         (iso (concat "\\(\\(" yyyy "-\\)?" iso-mm-dd "[ T]" iso-time
+                      "\\|" yyyy "-" iso-mm-dd "\\)"))
+         (western (concat "\\(" month s "+" dd "\\|" dd "\\.?" s month "\\)"
+                          s "+"
+                          "\\(" HH:MM "\\|" yyyy "\\)"))
+         (western-comma (concat month s "+" dd "," s "+" yyyy))
+         ;; Japanese MS-Windows ls-lisp has one-digit months, and
+         ;; omits the Kanji characters after month and day-of-month.
+         (mm "[ 0-1]?[0-9]")
+         (japanese
+          (concat mm l "?" s dd l "?" s "+"
+                  "\\(" HH:MM "\\|" yyyy l "?" "\\)")))
+    ;; the .* below ensures that we find the last match on a line
+    (concat ".*" s
+            "\\(" western "\\|" western-comma "\\|" japanese "\\|" iso "\\)"
+            s "+")))
+  (and (boundp 'vc-dired-switches)
+       vc-dired-switches
+       (set (make-local-variable 'dired-actual-switches)
+            vc-dired-switches))
+  (set (make-local-variable 'vc-dired-terse-mode) vc-dired-terse-display)
+  (let ((backend-name (symbol-name (vc-responsible-backend
+                                   default-directory))))
+    (setq mode-name (concat mode-name backend-name))
+    ;; Add menu after `vc-dired-mode-map' has `dired-mode-map' as the parent.
+    (let ((vc-dire-menu-map (copy-keymap vc-menu-map)))
+      (define-key-after (lookup-key vc-dired-mode-map [menu-bar]) [vc]
+       (cons backend-name vc-dire-menu-map) 'subdir)))
+  (setq vc-dired-mode t))
+
+(defun vc-dired-toggle-terse-mode ()
+  "Toggle terse display in VC Dired."
+  (interactive)
+  (if (not vc-dired-mode)
+      nil
+    (setq vc-dired-terse-mode (not vc-dired-terse-mode))
+    (if vc-dired-terse-mode
+        (vc-dired-hook)
+      (revert-buffer))))
+
+(defun vc-dired-mark-locked ()
+  "Mark all files currently locked."
+  (interactive)
+  (dired-mark-if (let ((f (dired-get-filename nil t)))
+                  (and f
+                       (not (file-directory-p f))
+                       (not (vc-up-to-date-p f))))
+                "locked file"))
+
+(define-key vc-dired-mode-map "*l" 'vc-dired-mark-locked)
+
+(defun vc-dired-reformat-line (vc-info)
+  "Reformat a directory-listing line.
+Replace various columns with version control information, VC-INFO.
+This code, like dired, assumes UNIX -l format."
+  (beginning-of-line)
+  (when (re-search-forward
+         ;; Match link count, owner, group, size.  Group may be missing,
+         ;; and only the size is present in OS/2 -l format.
+         "^..[drwxlts-]+ \\( *[0-9]+\\( [^ ]+ +\\([^ ]+ +\\)?[0-9]+\\)?\\) "
+         (line-end-position) t)
+      (replace-match (substring (concat vc-info "          ") 0 10)
+                     t t nil 1)))
+
+(defun vc-dired-ignorable-p (filename)
+  "Should FILENAME be ignored in VC-Dired listings?"
+  (catch t
+    ;; Ignore anything that wouldn't be found by completion (.o, .la, etc.)
+    (dolist (ignorable completion-ignored-extensions)
+      (let ((ext (substring filename
+                             (- (length filename)
+                                (length ignorable)))))
+       (if (string= ignorable ext) (throw t t))))
+    ;; Ignore Makefiles derived from something else
+    (when (string= (file-name-nondirectory filename) "Makefile")
+      (let* ((dir (file-name-directory filename))
+           (peers (directory-files (or dir default-directory))))
+       (if (or (member "Makefile.in" peers) (member "Makefile.am" peers))
+          (throw t t))))
+    nil))
 
 (defun vc-dired-hook ()
   "Reformat the listing according to version control.
@@ -2098,6 +2490,980 @@
            (goto-char (point-min))
            (message "No changes pending under %s" default-directory)))))
 
+(defun vc-dired-purge ()
+  "Remove empty subdirs."
+  (goto-char (point-min))
+  (while (dired-get-subdir)
+    (forward-line 2)
+    (if (dired-get-filename nil t)
+       (if (not (dired-next-subdir 1 t))
+           (goto-char (point-max)))
+      (forward-line -2)
+      (if (not (string= (dired-current-directory) default-directory))
+         (dired-do-kill-lines t "")
+       ;; We cannot remove the top level directory.
+       ;; Just make it look a little nicer.
+       (forward-line 1)
+       (or (eobp) (kill-line))
+       (if (not (dired-next-subdir 1 t))
+           (goto-char (point-max))))))
+  (goto-char (point-min)))
+
+(defun vc-dired-buffers-for-dir (dir)
+  "Return a list of all vc-dired buffers that currently display DIR."
+  (let (result)
+    ;; Check whether dired is loaded.
+    (when (fboundp 'dired-buffers-for-dir)
+      (dolist (buffer (dired-buffers-for-dir dir))
+        (with-current-buffer buffer
+          (when vc-dired-mode
+           (push buffer result)))))
+    (nreverse result)))
+
+(defun vc-directory-resynch-file (file)
+  "Update the entries for FILE in any VC Dired buffers that list it."
+  ;;FIXME This needs to be implemented so it works for vc-dir
+  (let ((buffers (vc-dired-buffers-for-dir (file-name-directory file))))
+    (when buffers
+      (mapcar (lambda (buffer)
+               (with-current-buffer buffer
+                 (when (dired-goto-file file)
+                   ;; bind vc-dired-terse-mode to nil so that
+                   ;; files won't vanish when they are checked in
+                   (let ((vc-dired-terse-mode nil))
+                     (dired-do-redisplay 1)))))
+             buffers))))
+
+;;;###autoload
+(defun vc-directory (dir read-switches)
+  "Create a buffer in VC Dired Mode for directory DIR.
+
+See Info node `VC Dired Mode'.
+
+With prefix arg READ-SWITCHES, specify a value to override
+`dired-listing-switches' when generating the listing."
+  (interactive "DDired under VC (directory): \nP")
+  (let ((vc-dired-switches (concat vc-dired-listing-switches
+                                   (if vc-dired-recurse "R" ""))))
+    (if read-switches
+        (setq vc-dired-switches
+              (read-string "Dired listing switches: "
+                           vc-dired-switches)))
+    (require 'dired)
+    (require 'dired-aux)
+    (switch-to-buffer
+     (dired-internal-noselect (expand-file-name (file-name-as-directory dir))
+                              vc-dired-switches
+                              'vc-dired-mode))))
+
+;; VC status implementation
+
+;; Used to store information for the files displayed in the *VC status* buffer.
+;; Each item displayed corresponds to one of these defstructs.
+(defstruct (vc-dir-fileinfo
+            (:copier nil)
+            (:type list)            ;So we can use `member' on lists of FIs.
+            (:constructor
+             ;; We could define it as an alias for `list'.
+            vc-dir-create-fileinfo (name state &optional extra marked 
directory))
+            (:conc-name vc-dir-fileinfo->))
+  name                                  ;Keep it as first, for `member'.
+  state
+  ;; For storing backend specific information.
+  extra
+  marked
+  ;; To keep track of not updated files during a global refresh
+  needs-update
+  ;; To distinguish files and directories.
+  directory)
+
+(defvar vc-ewoc nil)
+
+(defun vc-default-status-extra-headers (backend dir)
+  ;; Be loud by default to remind people to add coded to display
+  ;; backend specific headers.
+  ;; XXX: change this to return nil before the release.
+  "Extra      : Add backend specific headers here")
+
+(defun vc-dir-headers (backend dir)
+  "Display the headers in the *VC status* buffer.
+It calls the `status-extra-headers' backend method to display backend
+specific headers."
+  (concat
+   (propertize "VC backend : " 'face 'font-lock-type-face)
+   (propertize (format "%s\n" backend) 'face 'font-lock-variable-name-face)
+   (propertize "Working dir: " 'face 'font-lock-type-face)
+   (propertize (format "%s\n" dir) 'face 'font-lock-variable-name-face)
+   (vc-call-backend backend 'status-extra-headers dir)
+   "\n"))
+
+(defun vc-default-status-printer (backend fileentry)
+  "Pretty print FILEENTRY."
+  ;; If you change the layout here, change vc-dir-move-to-goal-column.
+  (let ((state
+        (if (vc-dir-fileinfo->directory fileentry)
+            'DIRECTORY
+          (vc-dir-fileinfo->state fileentry))))
+    (insert
+     (propertize
+      (format "%c" (if (vc-dir-fileinfo->marked fileentry) ?* ? ))
+      'face 'font-lock-type-face)
+     "   "
+     (propertize
+      (format "%-20s" state)
+      'face (cond ((eq state 'up-to-date) 'font-lock-builtin-face)
+                 ((memq state '(missing conflict)) 'font-lock-warning-face)
+                 (t 'font-lock-variable-name-face))
+      'mouse-face 'highlight)
+     " "
+     (propertize
+      (format "%s" (vc-dir-fileinfo->name fileentry))
+      'face 'font-lock-function-name-face
+      'mouse-face 'highlight))))
+
+(defun vc-dir-printer (fileentry)
+  (let ((backend (vc-responsible-backend default-directory)))
+    (vc-call-backend backend 'status-printer fileentry)))
+
+(defun vc-dir-move-to-goal-column ()
+  ;; Used to keep the cursor on the file name column.
+  (beginning-of-line)
+  ;; Must be in sync with vc-default-status-printer.
+  (forward-char 25))
+
+(defun vc-dir-prepare-status-buffer (dir &optional create-new)
+  "Find a *vc-dir* buffer showing DIR, or create a new one."
+  (setq dir (expand-file-name dir))
+  (let* ((bname "*vc-dir*")
+        ;; Look for another *vc-dir* buffer visiting the same directory.
+        (buf (save-excursion
+               (unless create-new
+                 (dolist (buffer (buffer-list))
+                   (set-buffer buffer)
+                   (when (and (eq major-mode 'vc-dir-mode)
+                              (string= (expand-file-name default-directory) 
dir))
+                     (return buffer)))))))
+    (or buf
+        ;; Create a new *vc-dir* buffer.
+        (with-current-buffer (create-file-buffer bname)
+          (cd dir)
+          (vc-setup-buffer (current-buffer))
+          ;; Reset the vc-parent-buffer-name so that it does not appear
+          ;; in the mode-line.
+          (setq vc-parent-buffer-name nil)
+          (current-buffer)))))
+
+;;;###autoload
+(defun vc-dir (dir)
+  "Show the VC status for DIR."
+  (interactive "DVC status for directory: ")
+  (pop-to-buffer (vc-dir-prepare-status-buffer dir))
+  (if (eq major-mode 'vc-dir-mode)
+      (vc-dir-refresh)
+    (vc-dir-mode)))
+
+(defvar vc-dir-menu-map
+  (let ((map (make-sparse-keymap "VC-dir")))
+    (define-key map [quit]
+      '(menu-item "Quit" quit-window
+                 :help "Quit"))
+    (define-key map [kill]
+      '(menu-item "Kill Update Command" vc-dir-kill-dir-status-process
+                 :enable (vc-dir-busy)
+                 :help "Kill the command that updates VC status buffer"))
+    (define-key map [refresh]
+      '(menu-item "Refresh" vc-dir-refresh
+                 :enable (not (vc-dir-busy))
+                 :help "Refresh the contents of the VC status buffer"))
+    (define-key map [remup]
+      '(menu-item "Hide up-to-date" vc-dir-hide-up-to-date
+                 :help "Hide up-to-date items from display"))
+    ;; Movement.
+    (define-key map [sepmv] '("--"))
+    (define-key map [next-line]
+      '(menu-item "Next line" vc-dir-next-line
+                 :help "Go to the next line" :keys "n"))
+    (define-key map [previous-line]
+      '(menu-item "Previous line" vc-dir-previous-line
+                 :help "Go to the previous line"))
+    ;; Marking.
+    (define-key map [sepmrk] '("--"))
+    (define-key map [unmark-all]
+      '(menu-item "Unmark All" vc-dir-unmark-all-files
+                 :help "Unmark all files that are in the same state as the 
current file\
+\nWith prefix argument unmark all files"))
+    (define-key map [unmark-previous]
+      '(menu-item "Unmark previous " vc-dir-unmark-file-up
+                 :help "Move to the previous line and unmark the file"))
+
+    (define-key map [mark-all]
+      '(menu-item "Mark All" vc-dir-mark-all-files
+                 :help "Mark all files that are in the same state as the 
current file\
+\nWith prefix argument mark all files"))
+    (define-key map [unmark]
+      '(menu-item "Unmark" vc-dir-unmark
+                 :help "Unmark the current file or all files in the region"))
+
+    (define-key map [mark]
+      '(menu-item "Mark" vc-dir-mark
+                 :help "Mark the current file or all files in the region"))
+
+    (define-key map [sepopn] '("--"))
+    (define-key map [open-other]
+      '(menu-item "Open in other window" vc-dir-find-file-other-window
+                 :help "Find the file on the current line, in another window"))
+    (define-key map [open]
+      '(menu-item "Open file" vc-dir-find-file
+                 :help "Find the file on the current line"))
+    ;; VC info details
+    (define-key map [sepvcdet] '("--"))
+    ;; FIXME: This needs a key binding.  And maybe a better name
+    ;; ("Insert" like PCL-CVS uses does not sound that great either)...
+    (define-key map [ins]
+      '(menu-item "Show File" vc-dir-show-fileentry
+                 :help "Show a file in the VC status listing even though it 
might be up to date"))
+    (define-key map [annotate]
+      '(menu-item "Annotate" vc-annotate
+                 :help "Display the edit history of the current file using 
colors"))
+    (define-key map [diff]
+      '(menu-item "Compare with Base Version" vc-diff
+                 :help "Compare file set with the base version"))
+    (define-key map [log]
+     '(menu-item "Show history" vc-print-log
+     :help "List the change log of the current file set in a window"))
+    ;; VC commands.
+    (define-key map [sepvccmd] '("--"))
+    (define-key map [update]
+      '(menu-item "Update to latest version" vc-update
+                 :help "Update the current fileset's files to their tip 
revisions"))
+    (define-key map [revert]
+      '(menu-item "Revert to base version" vc-revert
+                 :help "Revert working copies of the selected fileset to their 
repository contents."))
+    (define-key map [next-action]
+      ;; FIXME: This really really really needs a better name!
+      ;; And a key binding too.
+      '(menu-item "Check In/Out" vc-next-action
+                 :help "Do the next logical version control operation on the 
current fileset"))
+    (define-key map [register]
+      '(menu-item "Register" vc-dir-register
+                 :help "Register file set into the version control system"))
+    map)
+  "Menu for VC status")
+
+(defalias 'vc-dir-menu-map vc-dir-menu-map)
+
+(defvar vc-dir-mode-map
+  (let ((map (make-keymap)))
+    (suppress-keymap map)
+    ;; Marking.
+    (define-key map "m" 'vc-dir-mark)
+    (define-key map "M" 'vc-dir-mark-all-files)
+    (define-key map "u" 'vc-dir-unmark)
+    (define-key map "U" 'vc-dir-unmark-all-files)
+    (define-key map "\C-?" 'vc-dir-unmark-file-up)
+    (define-key map "\M-\C-?" 'vc-dir-unmark-all-files)
+    ;; Movement.
+    (define-key map "n" 'vc-dir-next-line)
+    (define-key map " " 'vc-dir-next-line)
+    (define-key map "\t" 'vc-dir-next-line)
+    (define-key map "p" 'vc-dir-previous-line)
+    (define-key map [backtab] 'vc-dir-previous-line)
+    ;; VC commands.
+    (define-key map "=" 'vc-diff)   ;; C-x v =
+    (define-key map "a" 'vc-dir-register)
+    (define-key map "+" 'vc-update) ;; C-x v +
+    (define-key map "R" 'vc-revert) ;; u is taken by unmark.
+
+    ;; Can't be "g" (as in vc map), so "A" for "Annotate".
+    (define-key map "A" 'vc-annotate)
+    (define-key map "l" 'vc-print-log) ;; C-x v l
+    ;; The remainder.
+    (define-key map "f" 'vc-dir-find-file)
+    (define-key map "\C-m" 'vc-dir-find-file)
+    (define-key map "o" 'vc-dir-find-file-other-window)
+    (define-key map "x" 'vc-dir-hide-up-to-date)
+    (define-key map "q" 'quit-window)
+    (define-key map "g" 'vc-dir-refresh)
+    (define-key map "\C-c\C-c" 'vc-dir-kill-dir-status-process)
+    (define-key map [(down-mouse-3)] 'vc-dir-menu)
+    (define-key map [(mouse-2)] 'vc-dir-toggle-mark)
+
+    ;; Hook up the menu.
+    (define-key map [menu-bar vc-dir-mode]
+      '(menu-item
+       ;; This is used to that VC backends could add backend specific
+       ;; menu items to vc-dir-menu-map.
+       "VC Status" vc-dir-menu-map :filter vc-dir-menu-map-filter))
+    map)
+  "Keymap for VC status")
+
+(defun vc-default-extra-status-menu (backend)
+  nil)
+
+;; This is used to that VC backends could add backend specific menu
+;; items to vc-dir-menu-map.
+(defun vc-dir-menu-map-filter (orig-binding)
+  (when (and (symbolp orig-binding) (fboundp orig-binding))
+    (setq orig-binding (indirect-function orig-binding)))
+  (let ((ext-binding
+        (vc-call-backend (vc-responsible-backend default-directory)
+                         'extra-status-menu)))
+    (if (null ext-binding)
+       orig-binding
+      (append orig-binding
+             '("----")
+             ext-binding))))
+
+(defmacro vc-at-event (event &rest body)
+  "Evaluate `body' wich point located at event-start of `event'.
+If `body' uses `event', it should be a variable,
+ otherwise it will be evaluated twice."
+  (let ((posn (gensym "vc-at-event-posn")))
+    `(let ((,posn (event-start ,event)))
+       (save-excursion
+         (set-buffer (window-buffer (posn-window ,posn)))
+         (goto-char (posn-point ,posn))
+         ,@body))))
+
+(defun vc-dir-menu (e)
+  "Popup the VC status menu."
+  (interactive "e")
+  (vc-at-event e (popup-menu vc-dir-menu-map e)))
+
+(defvar vc-dir-tool-bar-map
+  (let ((map (make-sparse-keymap)))
+    (tool-bar-local-item-from-menu 'vc-dir-find-file "open"
+                                  map vc-dir-mode-map)
+    (tool-bar-local-item "bookmark_add"
+                        'vc-dir-toggle-mark 'vc-dir-toggle-mark map
+                        :help "Toggle mark on current item")
+    (tool-bar-local-item-from-menu 'vc-dir-previous-line "left-arrow"
+                                  map vc-dir-mode-map
+                                  :rtl "right-arrow")
+    (tool-bar-local-item-from-menu 'vc-dir-next-line "right-arrow"
+                                  map vc-dir-mode-map
+                                  :rtl "left-arrow")
+    (tool-bar-local-item-from-menu 'vc-print-log "info"
+                                  map vc-dir-mode-map)
+    (tool-bar-local-item-from-menu 'vc-dir-refresh "refresh"
+                                  map vc-dir-mode-map)
+    (tool-bar-local-item-from-menu 'nonincremental-search-forward
+                                  "search" map)
+    (tool-bar-local-item-from-menu 'vc-dir-kill-dir-status-process "cancel"
+                                  map vc-dir-mode-map)
+    (tool-bar-local-item-from-menu 'quit-window "exit"
+                                  map vc-dir-mode-map)
+    map))
+
+(defvar vc-dir-process-buffer nil
+  "The buffer used for the asynchronous call that computes the VC status.")
+
+(defun vc-dir-mode ()
+  "Major mode for showing the VC status for a directory.
+Marking/Unmarking key bindings and actions:
+m - marks a file/directory or ff the region is active, mark all the files
+     in region.
+    Restrictions: - a file cannot be marked if any parent directory is marked
+                  - a directory cannot be marked if any child file or
+                    directory is marked
+u - marks a file/directory or if the region is active, unmark all the files
+     in region.
+M - if the cursor is on a file: mark all the files with the same VC state as
+      the current file
+  - if the cursor is on a directory: mark all child files
+  - with a prefix argument: mark all files
+U - if the cursor is on a file: unmark all the files with the same VC state
+      as the current file
+  - if the cursor is on a directory: unmark all child files
+  - with a prefix argument: unmark all files
+
+
+\\{vc-dir-mode-map}"
+  (setq mode-name "VC Status")
+  (setq major-mode 'vc-dir-mode)
+  (setq buffer-read-only t)
+  (use-local-map vc-dir-mode-map)
+  (set (make-local-variable 'tool-bar-map) vc-dir-tool-bar-map)
+  (let ((buffer-read-only nil)
+       (backend (vc-responsible-backend default-directory))
+       entries)
+    (erase-buffer)
+    (set (make-local-variable 'vc-dir-process-buffer) nil)
+    (set (make-local-variable 'vc-ewoc)
+        (ewoc-create #'vc-dir-printer
+                     (vc-dir-headers backend default-directory)))
+    (add-hook 'after-save-hook 'vc-dir-mark-buffer-changed)
+    ;; Make sure that if the VC status buffer is killed, the update
+    ;; process running in the background is also killed.
+    (add-hook 'kill-buffer-query-functions 'vc-dir-kill-query nil t)
+    (vc-dir-refresh))
+  (run-hooks 'vc-dir-mode-hook))
+
+(put 'vc-dir-mode 'mode-class 'special)
+
+;; t if directories should be shown in vc-dir.
+;; WORK IN PROGRESS!  DO NOT SET this! ONLY set it if you want to help
+;; write code for this feature.  This variable will likely disappear
+;; when the work is done.
+(defvar vc-dir-insert-directories nil)
+
+(defun vc-dir-update (entries buffer &optional noinsert)
+  "Update BUFFER's ewoc from the list of ENTRIES.
+If NOINSERT, ignore elements on ENTRIES which are not in the ewoc."
+  ;; Add ENTRIES to the vc-dir buffer BUFFER.
+  (with-current-buffer buffer
+    ;; Insert the entries sorted by name into the ewoc.
+    ;; We assume the ewoc is sorted too, which should be the
+    ;; case if we always add entries with vc-dir-update.
+    (setq entries
+         ;; Sort: first files and then subdirectories.
+         ;; XXX: this is VERY inefficient, it computes the directory
+         ;; names too many times
+         (sort entries
+               (lambda (entry1 entry2)
+                 (let ((dir1 (file-name-directory (expand-file-name (car 
entry1))))
+                       (dir2 (file-name-directory (expand-file-name (car 
entry2)))))
+                   (cond
+                    ((string< dir1 dir2) t)
+                    ((not (string= dir1 dir2)) nil)
+                    ((string< (car entry1) (car entry2))))))))
+    (if (not vc-dir-insert-directories)
+       (let ((entry (car entries))
+             (node (ewoc-nth vc-ewoc 0)))
+         (while (and entry node)
+           (let ((entryfile (car entry))
+                 (nodefile (vc-dir-fileinfo->name (ewoc-data node))))
+             (cond
+              ((string-lessp nodefile entryfile)
+               (setq node (ewoc-next vc-ewoc node)))
+              ((string-lessp entryfile nodefile)
+               (unless noinsert
+                 (ewoc-enter-before vc-ewoc node
+                                    (apply 'vc-dir-create-fileinfo entry)))
+               (setq entries (cdr entries) entry (car entries)))
+              (t
+               (setf (vc-dir-fileinfo->state (ewoc-data node)) (nth 1 entry))
+               (setf (vc-dir-fileinfo->extra (ewoc-data node)) (nth 2 entry))
+               (setf (vc-dir-fileinfo->needs-update (ewoc-data node)) nil)
+               (ewoc-invalidate vc-ewoc node)
+               (setq entries (cdr entries) entry (car entries))
+               (setq node (ewoc-next vc-ewoc node))))))
+         (unless (or node noinsert)
+           ;; We're past the last node, all remaining entries go to the end.
+           (while entries
+             (ewoc-enter-last vc-ewoc
+                              (apply 'vc-dir-create-fileinfo (pop entries))))))
+  ;; Insert directory entries in the right places.
+  (let ((entry (car entries))
+       (node (ewoc-nth vc-ewoc 0)))
+    ;; Insert . if it is not present.
+    (unless node
+      (let ((rd (file-relative-name default-directory)))
+       (ewoc-enter-last
+        vc-ewoc (vc-dir-create-fileinfo
+                 rd nil nil nil (expand-file-name default-directory))))
+      (setq node (ewoc-nth vc-ewoc 0)))
+
+    (while (and entry node)
+      (let* ((entryfile (car entry))
+            (entrydir (file-name-directory (expand-file-name entryfile)))
+            (nodedir
+             (or (vc-dir-fileinfo->directory (ewoc-data node))
+                 (file-name-directory
+                      (expand-file-name
+                       (vc-dir-fileinfo->name (ewoc-data node)))))))
+       (cond
+        ;; First try to find the directory.
+        ((string-lessp nodedir entrydir)
+         (setq node (ewoc-next vc-ewoc node)))
+        ((string-equal nodedir entrydir)
+         ;; Found the directory, find the place for the file name.
+         (let ((nodefile (vc-dir-fileinfo->name (ewoc-data node))))
+           (cond
+            ((string-lessp nodefile entryfile)
+             (setq node (ewoc-next vc-ewoc node)))
+             ((string-equal nodefile entryfile)
+              (setf (vc-dir-fileinfo->state (ewoc-data node)) (nth 1 entry))
+              (setf (vc-dir-fileinfo->extra (ewoc-data node)) (nth 2 entry))
+              (setf (vc-dir-fileinfo->needs-update (ewoc-data node)) nil)
+              (ewoc-invalidate vc-ewoc node)
+              (setq entries (cdr entries) entry (car entries))
+              (setq node (ewoc-next vc-ewoc node)))
+             (t
+              (ewoc-enter-before vc-ewoc node
+                                 (apply 'vc-dir-create-fileinfo entry))
+              (setq entries (cdr entries) entry (car entries))))))
+        (t
+         ;; We need to insert a directory node
+         (let ((rd (file-relative-name entrydir)))
+           (ewoc-enter-last
+            vc-ewoc (vc-dir-create-fileinfo rd nil nil nil entrydir)))
+         ;; Now insert the node itself.
+         (ewoc-enter-before vc-ewoc node
+                            (apply 'vc-dir-create-fileinfo entry))
+         (setq entries (cdr entries) entry (car entries))))))
+    ;; We're past the last node, all remaining entries go to the end.
+    (unless (or node noinsert)
+      (let* ((lastnode (ewoc-nth vc-ewoc -1))
+            (lastdir
+             (or (vc-dir-fileinfo->directory (ewoc-data lastnode))
+                 (file-name-directory
+                      (expand-file-name
+                       (vc-dir-fileinfo->name (ewoc-data lastnode)))))))
+       (dolist (entry entries)
+         (let ((entrydir (file-name-directory (expand-file-name (car entry)))))
+           ;; Insert a directory node if needed.
+           (unless (string-equal lastdir entrydir)
+             (setq lastdir entrydir)
+             (let ((rd (file-relative-name entrydir)))
+               (ewoc-enter-last
+                vc-ewoc (vc-dir-create-fileinfo rd nil nil nil entrydir))))
+           ;; Now insert the node itself.
+           (ewoc-enter-last vc-ewoc
+                            (apply 'vc-dir-create-fileinfo entry))))))))))
+
+(defun vc-dir-busy ()
+  (and (buffer-live-p vc-dir-process-buffer)
+       (get-buffer-process vc-dir-process-buffer)))
+
+(defun vc-dir-refresh-files (files default-state)
+  "Refresh some files in the VC status buffer."
+  (let ((backend (vc-responsible-backend default-directory))
+        (status-buffer (current-buffer))
+        (def-dir default-directory))
+    (vc-set-mode-line-busy-indicator)
+    ;; Call the `dir-status-file' backend function.
+    ;; `dir-status-file' is supposed to be asynchronous.
+    ;; It should compute the results, and then call the function
+    ;; passed as an argument in order to update the vc-dir buffer
+    ;; with the results.
+    (unless (buffer-live-p vc-dir-process-buffer)
+      (setq vc-dir-process-buffer
+            (generate-new-buffer (format " *VC-%s* tmp status" backend))))
+    (lexical-let ((buffer (current-buffer)))
+      (with-current-buffer vc-dir-process-buffer
+        (cd def-dir)
+        (erase-buffer)
+        (vc-call-backend
+         backend 'dir-status-files def-dir files default-state
+         (lambda (entries &optional more-to-come)
+           ;; ENTRIES is a list of (FILE VC_STATE EXTRA) items.
+           ;; If MORE-TO-COME is true, then more updates will come from
+           ;; the asynchronous process.
+           (with-current-buffer buffer
+             (vc-dir-update entries buffer)
+             (unless more-to-come
+               (setq mode-line-process nil)
+               ;; Remove the ones that haven't been updated at all.
+               ;; Those not-updated are those whose state is nil because the
+               ;; file/dir doesn't exist and isn't versioned.
+               (ewoc-filter vc-ewoc
+                            (lambda (info)
+                              (not (vc-dir-fileinfo->needs-update 
info))))))))))))
+
+(defun vc-dir-refresh ()
+  "Refresh the contents of the VC status buffer.
+Throw an error if another update process is in progress."
+  (interactive)
+  (if (vc-dir-busy)
+      (error "Another update process is in progress, cannot run two at a time")
+    (let ((backend (vc-responsible-backend default-directory))
+         (status-buffer (current-buffer))
+         (def-dir default-directory))
+      (vc-set-mode-line-busy-indicator)
+      ;; Call the `dir-status' backend function.
+      ;; `dir-status' is supposed to be asynchronous.
+      ;; It should compute the results, and then call the function
+      ;; passed as an argument in order to update the vc-dir buffer
+      ;; with the results.
+
+      ;; Create a buffer that can be used by `dir-status' and call
+      ;; `dir-status' with this buffer as the current buffer.  Use
+      ;; `vc-dir-process-buffer' to remember this buffer, so that
+      ;; it can be used later to kill the update process in case it
+      ;; takes too long.
+      (unless (buffer-live-p vc-dir-process-buffer)
+        (setq vc-dir-process-buffer
+              (generate-new-buffer (format " *VC-%s* tmp status" backend))))
+      ;; set the needs-update flag on all entries
+      (ewoc-map (lambda (info) (setf (vc-dir-fileinfo->needs-update info) t) 
nil)
+                vc-ewoc)
+      (lexical-let ((buffer (current-buffer)))
+        (with-current-buffer vc-dir-process-buffer
+          (cd def-dir)
+          (erase-buffer)
+          (vc-call-backend
+           backend 'dir-status def-dir
+           (lambda (entries &optional more-to-come)
+             ;; ENTRIES is a list of (FILE VC_STATE EXTRA) items.
+             ;; If MORE-TO-COME is true, then more updates will come from
+             ;; the asynchronous process.
+             (with-current-buffer buffer
+               (vc-dir-update entries buffer)
+               (unless more-to-come
+                 (let ((remaining
+                        (ewoc-collect
+                         vc-ewoc 'vc-dir-fileinfo->needs-update)))
+                   (if remaining
+                       (vc-dir-refresh-files
+                        (mapcar 'vc-dir-fileinfo->name remaining)
+                        'up-to-date)
+                     (setq mode-line-process nil))))))))))))
+
+(defun vc-dir-kill-dir-status-process ()
+  "Kill the temporary buffer and associated process."
+  (interactive)
+  (when (buffer-live-p vc-dir-process-buffer)
+    (let ((proc (get-buffer-process vc-dir-process-buffer)))
+      (when proc (delete-process proc))
+      (setq vc-dir-process-buffer nil)
+      (setq mode-line-process nil))))
+
+(defun vc-dir-kill-query ()
+  ;; Make sure that when the VC status buffer is killed the update
+  ;; process running in background is also killed.
+  (if (vc-dir-busy)
+    (when (y-or-n-p "Status update process running, really kill status 
buffer?")
+      (vc-dir-kill-dir-status-process)
+      t)
+    t))
+
+(defun vc-dir-next-line (arg)
+  "Go to the next line.
+If a prefix argument is given, move by that many lines."
+  (interactive "p")
+  (ewoc-goto-next vc-ewoc arg)
+  (vc-dir-move-to-goal-column))
+
+(defun vc-dir-previous-line (arg)
+  "Go to the previous line.
+If a prefix argument is given, move by that many lines."
+  (interactive "p")
+  (ewoc-goto-prev vc-ewoc arg)
+  (vc-dir-move-to-goal-column))
+
+(defun vc-dir-mark-unmark (mark-unmark-function)
+  (if (use-region-p)
+      (let ((firstl (line-number-at-pos (region-beginning)))
+           (lastl (line-number-at-pos (region-end))))
+       (save-excursion
+         (goto-char (region-beginning))
+         (while (<= (line-number-at-pos) lastl)
+           (funcall mark-unmark-function))))
+    (funcall mark-unmark-function)))
+
+(defun vc-dir-parent-marked-p (arg)
+  (when vc-dir-insert-directories
+    ;; Return nil if none of the parent directories of arg is marked.
+    (let* ((argdata (ewoc-data arg))
+          (argdir
+           (let ((crtdir (vc-dir-fileinfo->directory argdata)))
+             (if crtdir
+                 crtdir
+               (file-name-directory (expand-file-name
+                                     (vc-dir-fileinfo->name argdata))))))
+          (arglen (length argdir))
+          (crt arg)
+          data dir)
+      ;; Go through the predecessors, checking if any directory that is
+      ;; a parent is marked.
+      (while (setq crt (ewoc-prev vc-ewoc crt))
+       (setq data (ewoc-data crt))
+       (setq dir
+             (let ((crtdir (vc-dir-fileinfo->directory data)))
+               (if crtdir
+                   crtdir
+                 (file-name-directory (expand-file-name
+                                       (vc-dir-fileinfo->name data))))))
+
+       (when (and (vc-dir-fileinfo->directory data)
+                  (string-equal (substring argdir 0 (length dir)) dir))
+         (when (vc-dir-fileinfo->marked data)
+           (error "Cannot mark `%s', parent directory `%s' marked"
+                  (vc-dir-fileinfo->name argdata)
+                  (vc-dir-fileinfo->name data)))))
+      nil)))
+
+(defun vc-dir-children-marked-p (arg)
+  ;; Return nil if none of the children of arg is marked.
+  (when vc-dir-insert-directories
+    (let* ((argdata (ewoc-data arg))
+          (argdir (vc-dir-fileinfo->directory argdata))
+          (arglen (length argdir))
+          (is-child t)
+          (crt arg)
+          data dir)
+      (while (and is-child (setq crt (ewoc-next vc-ewoc crt)))
+       (setq data (ewoc-data crt))
+       (setq dir
+             (let ((crtdir (vc-dir-fileinfo->directory data)))
+               (if crtdir
+                   crtdir
+                 (file-name-directory (expand-file-name
+                                       (vc-dir-fileinfo->name data))))))
+       (if (string-equal argdir (substring dir 0 arglen))
+           (when (vc-dir-fileinfo->marked data)
+             (error "Cannot mark `%s', child `%s' marked"
+                    (vc-dir-fileinfo->name argdata)
+                    (vc-dir-fileinfo->name data)))
+         ;; We are done, we got to an entry that is not a child of `arg'.
+         (setq is-child nil)))
+      nil)))
+
+(defun vc-dir-mark-file (&optional arg)
+  ;; Mark ARG or the current file and move to the next line.
+  (let* ((crt (or arg (ewoc-locate vc-ewoc)))
+         (file (ewoc-data crt))
+        (isdir (vc-dir-fileinfo->directory file)))
+    (when (or (and isdir (not (vc-dir-children-marked-p crt)))
+             (and (not isdir) (not (vc-dir-parent-marked-p crt))))
+      (setf (vc-dir-fileinfo->marked file) t)
+      (ewoc-invalidate vc-ewoc crt)
+      (unless (or arg (mouse-event-p last-command-event))
+       (vc-dir-next-line 1)))))
+
+(defun vc-dir-mark ()
+  "Mark the current file or all files in the region.
+If the region is active, mark all the files in the region.
+Otherwise mark the file on the current line and move to the next
+line."
+  (interactive)
+  (vc-dir-mark-unmark 'vc-dir-mark-file))
+
+(defun vc-dir-mark-all-files (arg)
+  "Mark all files with the same state as the current one.
+With a prefix argument mark all files.
+If the current entry is a directory, mark all child files.
+
+The VC commands operate on files that are on the same state.
+This command is intended to make it easy to select all files that
+share the same state."
+  (interactive "P")
+  (if arg
+      ;; Mark all files.
+      (progn
+       ;; First check that no directory is marked, we can't mark
+       ;; files in that case.
+       (ewoc-map
+        (lambda (filearg)
+          (when (and (vc-dir-fileinfo->directory filearg)
+                     (vc-dir-fileinfo->directory filearg))
+            (error "Cannot mark all files, directory `%s' marked"
+                   (vc-dir-fileinfo->name filearg))))
+        vc-ewoc)
+       (ewoc-map
+        (lambda (filearg)
+          (unless (vc-dir-fileinfo->marked filearg)
+            (setf (vc-dir-fileinfo->marked filearg) t)
+            t))
+        vc-ewoc))
+    (let ((data (ewoc-data (ewoc-locate vc-ewoc))))
+      (if (vc-dir-fileinfo->directory data)
+         ;; It's a directory, mark child files.
+         (let ((crt (ewoc-locate vc-ewoc)))
+           (unless (vc-dir-children-marked-p crt)
+             (while (setq crt (ewoc-next vc-ewoc crt))
+               (let ((crt-data (ewoc-data crt)))
+                 (unless (vc-dir-fileinfo->directory crt-data)
+                   (setf (vc-dir-fileinfo->marked crt-data) t)
+                   (ewoc-invalidate vc-ewoc crt))))))
+       ;; It's a file
+       (let ((state (vc-dir-fileinfo->state data))
+             (crt (ewoc-nth vc-ewoc 0)))
+         (while crt
+           (let ((crt-data (ewoc-data crt)))
+             (when (and (not (vc-dir-fileinfo->marked crt-data))
+                        (eq (vc-dir-fileinfo->state crt-data) state)
+                        (not (vc-dir-fileinfo->directory crt-data)))
+               (vc-dir-mark-file crt)))
+           (setq crt (ewoc-next vc-ewoc crt))))))))
+
+(defun vc-dir-unmark-file ()
+  ;; Unmark the current file and move to the next line.
+  (let* ((crt (ewoc-locate vc-ewoc))
+         (file (ewoc-data crt)))
+    (setf (vc-dir-fileinfo->marked file) nil)
+    (ewoc-invalidate vc-ewoc crt)
+    (unless (mouse-event-p last-command-event)
+      (vc-dir-next-line 1))))
+
+(defun vc-dir-unmark ()
+  "Unmark the current file or all files in the region.
+If the region is active, unmark all the files in the region.
+Otherwise mark the file on the current line and move to the next
+line."
+  (interactive)
+  (vc-dir-mark-unmark 'vc-dir-unmark-file))
+
+(defun vc-dir-unmark-file-up ()
+  "Move to the previous line and unmark the file."
+  (interactive)
+  ;; If we're on the first line, we won't move up, but we will still
+  ;; remove the mark.  This seems a bit odd but it is what buffer-menu
+  ;; does.
+  (let* ((prev (ewoc-goto-prev vc-ewoc 1))
+        (file (ewoc-data prev)))
+    (setf (vc-dir-fileinfo->marked file) nil)
+    (ewoc-invalidate vc-ewoc prev)
+    (vc-dir-move-to-goal-column)))
+
+(defun vc-dir-unmark-all-files (arg)
+  "Unmark all files with the same state as the current one.
+With a prefix argument unmark all files.
+If the current entry is a directory, unmark all the child files.
+
+The VC commands operate on files that are on the same state.
+This command is intended to make it easy to deselect all files
+that share the same state."
+  (interactive "P")
+  (if arg
+      (ewoc-map
+       (lambda (filearg)
+        (when (vc-dir-fileinfo->marked filearg)
+          (setf (vc-dir-fileinfo->marked filearg) nil)
+          t))
+       vc-ewoc)
+    (let* ((crt (ewoc-locate vc-ewoc))
+          (data (ewoc-data crt)))
+      (if (vc-dir-fileinfo->directory data)
+         ;; It's a directory, unmark child files.
+         (while (setq crt (ewoc-next vc-ewoc crt))
+           (let ((crt-data (ewoc-data crt)))
+             (unless (vc-dir-fileinfo->directory crt-data)
+               (setf (vc-dir-fileinfo->marked crt-data) nil)
+               (ewoc-invalidate vc-ewoc crt))))
+       ;; It's a file
+       (let ((crt-state (vc-dir-fileinfo->state (ewoc-data crt))))
+         (ewoc-map
+          (lambda (filearg)
+            (when (and (vc-dir-fileinfo->marked filearg)
+                       (eq (vc-dir-fileinfo->state filearg) crt-state))
+              (setf (vc-dir-fileinfo->marked filearg) nil)
+              t))
+          vc-ewoc))))))
+
+(defun vc-dir-toggle-mark-file ()
+  (let* ((crt (ewoc-locate vc-ewoc))
+         (file (ewoc-data crt)))
+    (if (vc-dir-fileinfo->marked file)
+       (vc-dir-unmark-file)
+      (vc-dir-mark-file))))
+
+(defun vc-dir-toggle-mark (e)
+  (interactive "e")
+  (vc-at-event e (vc-dir-mark-unmark 'vc-dir-toggle-mark-file)))
+
+(defun vc-dir-register ()
+  "Register the marked files, or the current file if no marks."
+  (interactive)
+  ;; FIXME: Just pass the fileset to vc-register.
+  (mapc (lambda (arg) (vc-register nil arg))
+       (or (vc-dir-marked-files) (list (vc-dir-current-file)))))
+
+(defun vc-dir-delete-file ()
+  "Delete the marked files, or the current file if no marks."
+  (interactive)
+  (mapc 'vc-delete-file (or (vc-dir-marked-files)
+                            (list (vc-dir-current-file)))))
+
+(defun vc-dir-show-fileentry (file)
+  "Insert an entry for a specific file into the current VC status listing.
+This is typically used if the file is up-to-date (or has been added
+outside of VC) and one wants to do some operation on it."
+  (interactive "fShow file: ")
+  (vc-dir-update (list (list (file-relative-name file) (vc-state file))) 
(current-buffer)))
+
+(defun vc-dir-find-file ()
+  "Find the file on the current line."
+  (interactive)
+  (find-file (vc-dir-current-file)))
+
+(defun vc-dir-find-file-other-window ()
+  "Find the file on the current line, in another window."
+  (interactive)
+  (find-file-other-window (vc-dir-current-file)))
+
+(defun vc-dir-current-file ()
+  (let ((node (ewoc-locate vc-ewoc)))
+    (unless node
+      (error "No file available."))
+    (expand-file-name (vc-dir-fileinfo->name (ewoc-data node)))))
+
+(defun vc-dir-marked-files ()
+  "Return the list of marked files."
+  (mapcar
+   (lambda (elem) (expand-file-name (vc-dir-fileinfo->name elem)))
+   (ewoc-collect vc-ewoc 'vc-dir-fileinfo->marked)))
+
+(defun vc-dir-marked-only-files ()
+  "Return the list of marked files, for marked directories, return child 
files."
+
+  (let ((crt (ewoc-nth vc-ewoc 0))
+       result)
+    (while crt
+      (let ((crt-data (ewoc-data crt)))
+       (if (vc-dir-fileinfo->marked crt-data)
+           (if (vc-dir-fileinfo->directory crt-data)
+               (let* ((dir (vc-dir-fileinfo->directory crt-data))
+                      (dirlen (length dir))
+                      data)
+                 (while
+                     (and (setq crt (ewoc-next vc-ewoc crt))
+                          (string-equal
+                           (substring
+                            (progn
+                              (setq data (ewoc-data crt))
+                              (let ((crtdir (vc-dir-fileinfo->directory data)))
+                                (if crtdir
+                                    crtdir
+                                  (file-name-directory
+                                   (expand-file-name
+                                    (vc-dir-fileinfo->name data))))))
+                            0 dirlen)
+                           dir))
+                   (unless (vc-dir-fileinfo->directory data)
+                     (push (vc-dir-fileinfo->name data) result))))
+             (push (expand-file-name (vc-dir-fileinfo->name crt-data)) result)
+             (setq crt (ewoc-next vc-ewoc crt)))
+         (setq crt (ewoc-next vc-ewoc crt)))))
+    result))
+
+(defun vc-dir-hide-up-to-date ()
+  "Hide up-to-date items from display."
+  (interactive)
+  (ewoc-filter
+   vc-ewoc
+   (lambda (crt) (not (eq (vc-dir-fileinfo->state crt) 'up-to-date)))))
+
+(defun vc-default-status-fileinfo-extra (backend file)
+  nil)
+
+(defun vc-dir-mark-buffer-changed (&optional fname)
+  (let* ((file (or fname (expand-file-name buffer-file-name)))
+        (found-vc-dir-buf nil))
+    (save-excursion
+      (dolist (status-buf (buffer-list))
+       (set-buffer status-buf)
+       ;; look for a vc-dir buffer that might show this file.
+       (when (eq major-mode 'vc-dir-mode)
+         (setq found-vc-dir-buf t)
+         (let ((ddir (expand-file-name default-directory)))
+           ;; This test is cvs-string-prefix-p
+           (when (eq t (compare-strings file nil (length ddir) ddir nil nil))
+             (let*
+                 ((file-short (substring file (length ddir)))
+                  (backend (vc-backend file))
+                  (state (and backend (vc-state file)))
+                  (extra
+                   (and backend
+                        (vc-call-backend backend 'status-fileinfo-extra file)))
+                  (entry
+                   (list file-short (if state state 'unregistered) extra)))
+               (vc-dir-update (list entry) status-buf))))))
+      ;; We didn't find any vc-dir buffers, remove the hook, it is
+      ;; not needed.
+      (unless found-vc-dir-buf (remove-hook 'after-save-hook 
'vc-dir-mark-buffer-changed)))))
+
 ;; Named-configuration entry points
 
 (defun vc-snapshot-precondition (dir)
@@ -3307,6 +4673,30 @@
   (set-buffer-modified-p nil)
   (setq buffer-file-name nil))
 
+;; These things should probably be generally available
+
+(defun vc-file-tree-walk (dirname func &rest args)
+  "Walk recursively through DIRNAME.
+Invoke FUNC f ARGS on each VC-managed file f underneath it."
+  (vc-file-tree-walk-internal (expand-file-name dirname) func args)
+  (message "Traversing directory %s...done" dirname))
+
+(defun vc-file-tree-walk-internal (file func args)
+  (if (not (file-directory-p file))
+      (when (vc-backend file) (apply func file args))
+    (message "Traversing directory %s..." (abbreviate-file-name file))
+    (let ((dir (file-name-as-directory file)))
+      (mapcar
+       (lambda (f) (or
+               (string-equal f ".")
+               (string-equal f "..")
+               (member f vc-directory-exclusion-list)
+               (let ((dirf (expand-file-name f dir)))
+                 (or
+                  (file-symlink-p dirf) ;; Avoid possible loops.
+                  (vc-file-tree-walk-internal dirf func args)))))
+       (directory-files dir)))))
+
 (provide 'vc)
 
 ;; DEVELOPER'S NOTES ON CONCURRENCY PROBLEMS IN THIS CODE




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