- (interactive "cJump to register: ")
- (let ((val (get-register char)))
- (condition-case ()
- (set-frame-configuration val)
- (error
- (if (markerp val)
- (progn
- (switch-to-buffer (marker-buffer val))
- (goto-char val))
- (error "Register doesn't contain a buffer position or frame configuration"))))))
-
-;(defun number-to-register (arg char)
-; "Store a number in a register.
-;Two args, NUMBER and REGISTER (a character, naming the register).
-;If NUMBER is nil, digits in the buffer following point are read
-;to get the number to store.
-;Interactively, NUMBER is the prefix arg (none means nil)."
-; (interactive "P\ncNumber to register: ")
-; (set-register char
-; (if arg
-; (prefix-numeric-value arg)
-; (if (looking-at "[0-9][0-9]*")
-; (save-excursion
-; (save-restriction
-; (narrow-to-region (point)
-; (progn (skip-chars-forward "0-9")
-; (point)))
-; (goto-char (point-min))
-; (read (current-buffer))))
-; 0))))
-
-;(defun increment-register (arg char)
-; "Add NUMBER to the contents of register REGISTER.
-;Interactively, NUMBER is the prefix arg (none means nil)."
-; (interactive "p\ncNumber to register: ")
-; (or (integerp (get-register char))
-; (error "Register does not contain a number"))
-; (set-register char (+ arg (get-register char))))
-
-(defun view-register (char)
+ (interactive "cFrame configuration to register: \nP")
+ ;; current-frame-configuration does not include the value
+ ;; of point in the current buffer, so record that separately.
+ (set-register register (list (current-frame-configuration) (point-marker))))
+
+(defalias 'register-to-point 'jump-to-register)
+(defun jump-to-register (register &optional delete)
+ "Move point to location stored in a register.
+If the register contains a file name, find that file.
+ \(To put a file name in a register, you must use `set-register'.)
+If the register contains a window configuration (one frame) or a frame
+configuration (all frames), restore that frame or all frames accordingly.
+First argument is a character, naming the register.
+Optional second arg non-nil (interactively, prefix argument) says to
+delete any existing frames that the frame configuration doesn't mention.
+\(Otherwise, these frames are iconified.)"
+ (interactive "cJump to register: \nP")
+ (let ((val (get-register register)))
+ (cond
+ ((and (consp val) (frame-configuration-p (car val)))
+ (set-frame-configuration (car val) (not delete))
+ (goto-char (cadr val)))
+ ((and (consp val) (window-configuration-p (car val)))
+ (set-window-configuration (car val))
+ (goto-char (cadr val)))
+ ((markerp val)
+ (or (marker-buffer val)
+ (error "That register's buffer no longer exists"))
+ (switch-to-buffer (marker-buffer val))
+ (goto-char val))
+ ((and (consp val) (eq (car val) 'file))
+ (find-file (cdr val)))
+ ((and (consp val) (eq (car val) 'file-query))
+ (or (find-buffer-visiting (nth 1 val))
+ (y-or-n-p (format "Visit file %s again? " (nth 1 val)))
+ (error "Register access aborted"))
+ (find-file (nth 1 val))
+ (goto-char (nth 2 val)))
+ (t
+ (error "Register doesn't contain a buffer position or configuration")))))
+
+(defun register-swap-out ()
+ "Turn markers into file-query references when a buffer is killed."
+ (and buffer-file-name
+ (dolist (elem register-alist)
+ (and (markerp (cdr elem))
+ (eq (marker-buffer (cdr elem)) (current-buffer))
+ (setcdr elem
+ (list 'file-query
+ buffer-file-name
+ (marker-position (cdr elem))))))))
+
+(defun number-to-register (number register)
+ "Store a number in a register.
+Two args, NUMBER and REGISTER (a character, naming the register).
+If NUMBER is nil, a decimal number is read from the buffer starting
+at point, and point moves to the end of that number.
+Interactively, NUMBER is the prefix arg (none means nil)."
+ (interactive "P\ncNumber to register: ")
+ (set-register register
+ (if number
+ (prefix-numeric-value number)
+ (if (looking-at "\\s-*-?[0-9]+")
+ (progn
+ (goto-char (match-end 0))
+ (string-to-number (match-string 0)))
+ 0))))
+
+(defun increment-register (number register)
+ "Add NUMBER to the contents of register REGISTER.
+Interactively, NUMBER is the prefix arg."
+ (interactive "p\ncIncrement register: ")
+ (or (numberp (get-register register))
+ (error "Register does not contain a number"))
+ (set-register register (+ number (get-register register))))
+
+(defun view-register (register)