-;;; vc-hooks.el -- resident support for version-control
+;;; vc-hooks.el --- resident support for version-control
-;; Copyright (C) 1992 Free Software Foundation, Inc.
+;; Copyright (C) 1992, 1993 Free Software Foundation, Inc.
;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
-;; Version: 4.0
-
-;; $Id: vc-hooks.el,v 1.6 1992/10/24 20:07:08 rms Exp rms $
+;; Version: 5.3
;; This file is part of GNU Emacs.
"*If non-nil, backups of registered files are made according to
the make-backup-files variable. Otherwise, prevents backups being made.")
+(defvar vc-rcs-status t
+ "*If non-nil, revision and locks on RCS working file displayed in modeline.
+Otherwise, not displayed.")
+
;; Tell Emacs about this new kind of minor mode
-(if (not (assoc 'vc-mode-string minor-mode-alist))
- (setq minor-mode-alist (cons '(vc-mode-string vc-mode-string)
+(if (not (assoc 'vc-mode minor-mode-alist))
+ (setq minor-mode-alist (cons '(vc-mode vc-mode)
minor-mode-alist)))
-(make-variable-buffer-local 'vc-mode-string)
+(make-variable-buffer-local 'vc-mode)
+(put 'vc-mode 'permanent-local t)
;; We need a notion of per-file properties because the version
;; control state of a file is expensive to derive --- we don't
;; want to recompute it even on every find.
+(defmacro vc-error-occurred (&rest body)
+ (list 'condition-case nil (cons 'progn (append body '(nil))) '(error t)))
+
(defvar vc-file-prop-obarray [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
"Obarray for per-file properties.")
vc-master-templates)
nil)))))
+(defun vc-name (file)
+ "Return the master name of a file, nil if it is not registered."
+ (or (vc-file-getprop file 'vc-name)
+ (let ((name-and-type (vc-registered file)))
+ (if name-and-type
+ (progn
+ (vc-file-setprop file 'vc-backend (cdr name-and-type))
+ (vc-file-setprop file 'vc-name (car name-and-type)))))))
+
(defun vc-backend-deduce (file)
- "Return the version-control type of a file, nil if it is not registered"
+ "Return the version-control type of a file, nil if it is not registered."
(and file
(or (vc-file-getprop file 'vc-backend)
- (vc-file-setprop file 'vc-backend (cdr (vc-registered file))))))
+ (let ((name-and-type (vc-registered file)))
+ (if name-and-type
+ (progn
+ (vc-file-setprop file 'vc-name (car name-and-type))
+ (vc-file-setprop file 'vc-backend (cdr name-and-type))))))))
(defun vc-toggle-read-only ()
- "If the file in the current buffer is under version control, perform the
-logical next version-control action; otherwise, just toggle the buffer's
-read-only flag."
+ "Change read-only status of current buffer, perhaps via version control.
+If the buffer is visiting a file registered with version control,
+then check the file in or out. Otherwise, just change the read-only flag
+of the buffer."
(interactive)
(if (vc-backend-deduce (buffer-file-name))
(vc-next-action nil)
(toggle-read-only)))
+(define-key global-map "\C-x\C-q" 'vc-toggle-read-only)
(defun vc-mode-line (file &optional label)
- "Set `vc-mode-string' to display type of version control for FILE.
+ "Set `vc-mode' to display type of version control for FILE.
The value is set in the current buffer, which should be the buffer
visiting FILE."
(interactive (list buffer-file-name nil))
(let ((vc-type (vc-backend-deduce file)))
- (if vc-type
- (progn
- (if (null (current-local-map))
- (use-local-map (make-sparse-keymap)))
- (define-key (current-local-map) "\C-x\C-q" 'vc-toggle-read-only)
- (setq vc-mode-string
- (concat " " (or label (symbol-name vc-type))))))
+ (setq vc-mode
+ (and vc-type
+ (concat " " (or label (symbol-name vc-type))
+ (if (and vc-rcs-status (eq vc-type 'RCS))
+ (vc-rcs-status file)))))
;; force update of mode line
(set-buffer-modified-p (buffer-modified-p))
vc-type))
+(defun vc-rcs-status (file)
+ ;; Return string for placement in modeline by `vc-mode-line'.
+ ;; If FILE is not registered under RCS, return nil.
+ ;; If FILE is registered but not locked, return " REV" if there is a head
+ ;; revision and " @@" otherwise.
+ ;; If FILE is locked then return all locks in a string of the
+ ;; form " LOCKER1:REV1 LOCKER2:REV2 ...", where "LOCKERi:" is empty if you
+ ;; are the locker, and otherwise is the name of the locker followed by ":".
+
+ ;; Algorithm:
+
+ ;; 1. Check for master file corresponding to FILE being visited.
+ ;;
+ ;; 2. Insert the first few characters of the master file into a work
+ ;; buffer.
+ ;;
+ ;; 3. Search work buffer for "locks...;" phrase; if not found, then
+ ;; keep inserting more characters until the phrase is found.
+ ;;
+ ;; 4. Extract the locks, and remove control characters
+ ;; separating them, like newlines; the string " user1:revision1
+ ;; user2:revision2 ..." is returned.
+
+ ;; Limitations:
+
+ ;; The output doesn't show which version you are actually looking at.
+ ;; The modeline can get quite cluttered when there are multiple locks.
+ ;; The head revision is probably not what you want if you've used `rcs -b'.
+
+ (let ((master (vc-name file))
+ found)
+
+ ;; If master file exists, then parse its contents, otherwise we return the
+ ;; nil value of this if form.
+ (if master
+ (save-excursion
+
+ ;; Create work buffer.
+ (set-buffer (get-buffer-create " *vc-rcs-status*"))
+ (setq buffer-read-only nil
+ default-directory (file-name-directory master))
+ (erase-buffer)
+
+ ;; Check if we have enough of the header.
+ ;; If not, then keep including more.
+ (while
+ (not (or found
+ (let ((s (buffer-size)))
+ (goto-char (1+ s))
+ (zerop (car (cdr (insert-file-contents
+ master nil s (+ s 8192))))))))
+ (beginning-of-line)
+ (setq found (re-search-forward "^locks\\([^;]*\\);" nil t)))
+
+ (if found
+ ;; Clean control characters and self-locks from text.
+ (let* ((lock-pattern
+ (concat "[ \b\t\n\v\f\r]+\\("
+ (regexp-quote (user-login-name))
+ ":\\)?"))
+ (locks
+ (save-restriction
+ (narrow-to-region (match-beginning 1) (match-end 1))
+ (goto-char (point-min))
+ (while (re-search-forward lock-pattern nil t)
+ (replace-match (if (eobp) "" "-") t t))
+ (buffer-string)))
+ (status
+ (if (not (string-equal locks ""))
+ locks
+ (goto-char (point-min))
+ (if (looking-at "head[ \b\t\n\v\f\r]+\\([.0-9]+\\)")
+ (concat "-" (buffer-substring (match-beginning 1)
+ (match-end 1)))
+ " @@"))))
+ ;; Clean work buffer.
+ (erase-buffer)
+ (set-buffer-modified-p nil)
+ status))))))
+
;;; install a call to the above as a find-file hook
(defun vc-find-file-hook ()
;; Recompute whether file is version controlled,
;; if user has killed the buffer and revisited.
- (vc-file-setprop buffer-file-name 'vc-backend nil)
+ (if buffer-file-name
+ (vc-file-setprop buffer-file-name 'vc-backend nil))
(if (and (vc-mode-line buffer-file-name) (not vc-make-backup-files))
(progn
(make-local-variable 'make-backup-files)
(setq make-backup-files nil))))
-(or (memq 'vc-find-file-hook find-file-hooks)
- (setq find-file-hooks
- (cons 'vc-find-file-hook find-file-hooks)))
+(add-hook 'find-file-hooks 'vc-find-file-hook)
;;; more hooks, this time for file-not-found
(defun vc-file-not-found-hook ()
(require 'vc)
(not (vc-error-occurred (vc-checkout buffer-file-name))))))
-(or (memq 'vc-file-not-found-hook find-file-not-found-hooks)
- (setq find-file-not-found-hooks
- (cons 'vc-file-not-found-hook find-file-not-found-hooks)))
+(add-hook 'find-file-not-found-hooks 'vc-file-not-found-hook)
;;; Now arrange for bindings and autoloading of the main package.
-;;; Bindings for this have to go in the global map, as it may have
-;;; to coexist with a lot of different major modes.
+;;; Bindings for this have to go in the global map, as we'll often
+;;; want to call them from random buffers.
(setq vc-prefix-map (lookup-key global-map "\C-xv"))
(if (not (keymapp vc-prefix-map))
HCoop / bpt / emacs.git / blobdiff