-;;; register.el --- register commands for Emacs.
+;;; register.el --- register commands for Emacs
;; Copyright (C) 1985, 1993, 1994 Free Software Foundation, Inc.
(let ((aelt (assq register register-alist)))
(if aelt
(setcdr aelt value)
- (setq aelt (cons register value))
- (setq register-alist (cons aelt register-alist)))
+ (push (cons register value) register-alist))
value))
(defun point-to-register (register &optional arg)
Use \\[jump-to-register] to go to that location or restore that configuration.
Argument is a character, naming the register."
(interactive "cPoint to register: \nP")
+ ;; Turn the marker into a file-ref if the buffer is killed.
+ (add-hook 'kill-buffer-hook 'register-swap-out nil t)
(set-register register
(if arg (list (current-frame-configuration) (point-marker))
(point-marker))))
(t
(error "Register doesn't contain a buffer position or configuration")))))
-;; Turn markers into file-query references when a buffer is killed.
(defun register-swap-out ()
+ "Turn markers into file-query references when a buffer is killed."
(and buffer-file-name
- (let ((tail register-alist))
- (while tail
- (and (markerp (cdr (car tail)))
- (eq (marker-buffer (cdr (car tail))) (current-buffer))
- (setcdr (car tail)
- (list 'file-query
- buffer-file-name
- (marker-position (cdr (car tail))))))
- (setq tail (cdr tail))))))
-
-(add-hook 'kill-buffer-hook 'register-swap-out)
+ (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.
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
+ (set-register register
(if number
(prefix-numeric-value number)
(if (looking-at "\\s-*-?[0-9]+")
(if (null val)
(message "Register %s is empty" (single-key-description register))
(with-output-to-temp-buffer "*Output*"
- (princ "Register ")
- (princ (single-key-description register))
- (princ " contains ")
- (cond
- ((numberp val)
- (princ val))
-
- ((markerp 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)))))
-
- ((and (consp val) (window-configuration-p (car val)))
- (princ "a window configuration."))
-
- ((and (consp val) (frame-configuration-p (car val)))
- (princ "a frame configuration."))
-
- ((and (consp val) (eq (car val) 'file))
- (princ "the file ")
- (prin1 (cdr val))
- (princ "."))
-
- ((and (consp val) (eq (car val) 'file-query))
- (princ "a file-query reference:\nfile ")
- (prin1 (car (cdr val)))
- (princ ",\nposition ")
- (princ (car (cdr (cdr val))))
- (princ "."))
-
- ((consp val)
- (princ "the rectangle:\n")
- (while val
- (princ (car val))
- (terpri)
- (setq val (cdr val))))
-
- ((stringp val)
- (princ "the text:\n")
- (princ val))
+ (describe-register-1 register t)))))
+
+(defun list-registers ()
+ "Display a list of nonempty registers saying briefly what they contain."
+ (interactive)
+ (let ((list (copy-sequence register-alist)))
+ (setq list (sort list (lambda (a b) (< (car a) (car b)))))
+ (with-output-to-temp-buffer "*Output*"
+ (dolist (elt list)
+ (when (get-register (car elt))
+ (describe-register-1 (car elt))
+ (terpri))))))
+
+(defun describe-register-1 (register &optional verbose)
+ (princ "Register ")
+ (princ (single-key-description register))
+ (princ " contains ")
+ (let ((val (get-register register)))
+ (cond
+ ((numberp val)
+ (princ val))
+
+ ((markerp val)
+ (let ((buf (marker-buffer val)))
+ (if (null buf)
+ (princ "a marker in no buffer")
+ (princ "a buffer position:\n buffer ")
+ (princ (buffer-name buf))
+ (princ ", position ")
+ (princ (marker-position val)))))
+
+ ((and (consp val) (window-configuration-p (car val)))
+ (princ "a window configuration."))
+
+ ((and (consp val) (frame-configuration-p (car val)))
+ (princ "a frame configuration."))
+
+ ((and (consp val) (eq (car val) 'file))
+ (princ "the file ")
+ (prin1 (cdr val))
+ (princ "."))
+
+ ((and (consp val) (eq (car val) 'file-query))
+ (princ "a file-query reference:\n file ")
+ (prin1 (car (cdr val)))
+ (princ ",\n position ")
+ (princ (car (cdr (cdr val))))
+ (princ "."))
+ ((consp val)
+ (if verbose
+ (progn
+ (princ "the rectangle:\n")
+ (while val
+ (princ " ")
+ (princ (car val))
+ (terpri)
+ (setq val (cdr val))))
+ (princ "a rectangle starting with ")
+ (princ (car val))))
+
+ ((stringp val)
+ (remove-list-of-text-properties 0 (length val)
+ yank-excluded-properties val)
+ (if verbose
+ (progn
+ (princ "the text:\n")
+ (princ val))
+ (cond
+ ;; Extract first N characters starting with first non-whitespace.
+ ((string-match (format "[^ \t\n].\\{,%d\\}"
+ ;; Deduct 6 for the spaces inserted below.
+ (min 20 (max 0 (- (window-width) 6))))
+ val)
+ (princ "text starting with\n ")
+ (princ (match-string 0 val)))
+ ((string-match "^[ \t\n]+$" val)
+ (princ "whitespace"))
(t
- (princ "Garbage:\n")
- (prin1 val)))))))
+ (princ "the empty string")))))
+ (t
+ (princ "Garbage:\n")
+ (if verbose (prin1 val))))))
(defun insert-register (register &optional arg)
"Insert contents of register REGISTER. (REGISTER is a character.)
((consp val)
(insert-rectangle val))
((stringp val)
- (insert val))
+ (insert-for-yank val))
((numberp val)
(princ val (current-buffer)))
((and (markerp val) (marker-position val))