;;; register.el --- register commands for Emacs.
-;; Copyright (C) 1985 Free Software Foundation, Inc.
+;; Copyright (C) 1985, 1993, 1994 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: internal
"Alist of elements (NAME . CONTENTS), one for each Emacs register.
NAME is a character (a number). CONTENTS is a string, number,
frame configuration, mark or list.
-A list represents a rectangle; its elements are strings.")
+A list of strings represents a rectangle.
+A list of the form (file . NAME) represents the file named NAME.")
(defun get-register (char)
"Return contents of Emacs register named CHAR, or nil if none."
(cdr (assq char register-alist)))
(defun set-register (char value)
- "Set contents of Emacs register named CHAR to VALUE. Returns VALUE."
+ "Set contents of Emacs register named CHAR to VALUE. Returns VALUE.
+See the documentation of the variable `register-alist' for possible VALUE."
(let ((aelt (assq char register-alist)))
(if aelt
(setcdr aelt value)
"Store the window configuration of the selected frame in register REGISTER.
Use \\[jump-to-register] to restore the configuration.
Argument is a character, naming the register."
- (interactive "cPoint to register: \nP")
+ (interactive "cWindow configuration to register: \nP")
(set-register char (current-window-configuration)))
(defun frame-configuration-to-register (char &optional arg)
"Store the window configuration of all frames in register REGISTER.
Use \\[jump-to-register] to restore the configuration.
Argument is a character, naming the register."
- (interactive "cPoint to register: \nP")
+ (interactive "cFrame configuration to register: \nP")
(set-register char (current-frame-configuration)))
-(fset 'register-to-point 'jump-to-register)
-(defun jump-to-register (char)
+(defalias 'register-to-point 'jump-to-register)
+(defun jump-to-register (char &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.
-Argument is a character, naming the register."
- (interactive "cJump to register: ")
+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 char)))
(cond
- ((frame-configuration-p val)
- (set-frame-configuration val))
+ ((and (fboundp 'frame-configuration-p)
+ (frame-configuration-p val))
+ (set-frame-configuration val (not delete)))
((window-configuration-p val)
(set-window-configuration 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)))
(t
(error "Register doesn't contain a buffer position or configuration")))))
(princ val))
((markerp val)
- (princ "a buffer position:\nbuffer ")
- (princ (buffer-name (marker-buffer val)))
- (princ ", position ")
- (princ (+ 0 val)))
+ (let ((buf (marker-buffer val)))
+ (if (null buf)
+ (princ "a marker in no buffer")
+ (princ "a buffer position:\nbuffer ")
+ (princ (buffer-name buf))
+ (princ ", position ")
+ (princ (marker-position val)))))
((window-configuration-p val)
(princ "a window configuration."))
((frame-configuration-p val)
(princ "a frame configuration."))
+ ((and (consp val) (eq (car val) 'file))
+ (princ "the file ")
+ (prin1 (cdr val))
+ (princ "."))
+
((consp val)
(princ "the rectangle:\n")
(while val
Normally puts point before and mark after the inserted text.
If optional second arg is non-nil, puts mark before and point after.
Interactively, second arg is non-nil if prefix arg is supplied."
- (interactive "cInsert register: \nP")
+ (interactive "*cInsert register: \nP")
(push-mark)
(let ((val (get-register char)))
- (if (consp val)
- (insert-rectangle val)
- (if (stringp val)
- (insert val)
- (if (or (integerp val) (markerp val))
- (princ (+ 0 val) (current-buffer))
- (error "Register does not contain text")))))
+ (cond
+ ((consp val)
+ (insert-rectangle val))
+ ((stringp val)
+ (insert val))
+ ((integerp val)
+ (princ val (current-buffer)))
+ ((and (markerp val) (marker-position val))
+ (princ (marker-position val) (current-buffer)))
+ (t
+ (error "Register does not contain text"))))
(if (not arg) (exchange-point-and-mark)))
(defun copy-to-register (char start end &optional delete-flag)