-;;; register.el --- register commands for Emacs.
+;;; register.el --- register commands for Emacs
-;; Copyright (C) 1985, 1993, 1994 Free Software Foundation, Inc.
+;; Copyright (C) 1985, 1993, 1994, 2002, 2003, 2004,
+;; 2005, 2006 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: internal
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
(defvar register-alist nil
"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.
+NAME is a character (a number). CONTENTS is a string, number, marker or list.
A list of strings represents a rectangle.
-A list of the form (file . NAME) represents the file named NAME.")
+A list of the form (file . NAME) represents the file named NAME.
+A list of the form (file-query NAME POSITION) represents position POSITION
+ in the file named NAME, but query before visiting it.
+A list of the form (WINDOW-CONFIGURATION POSITION)
+ represents a saved window configuration plus a saved value of point.
+A list of the form (FRAME-CONFIGURATION POSITION)
+ represents a saved frame configuration plus a saved value of point.")
(defun get-register (reg)
"Return contents of Emacs register named REG, or nil if none."
(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 (current-frame-configuration) (point-marker))))
+ (if arg (list (current-frame-configuration) (point-marker))
+ (point-marker))))
(defun window-configuration-to-register (register &optional arg)
"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 "cWindow configuration to register: \nP")
- (set-register register (current-window-configuration)))
+ ;; current-window-configuration does not include the value
+ ;; of point in the current buffer, so record that separately.
+ (set-register register (list (current-window-configuration) (point-marker))))
(defun frame-configuration-to-register (register &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 "cFrame configuration to register: \nP")
- (set-register register (current-frame-configuration)))
+ ;; 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)
(interactive "cJump to register: \nP")
(let ((val (get-register register)))
(cond
- ((and (fboundp 'frame-configuration-p)
- (frame-configuration-p val))
- (set-frame-configuration val (not delete)))
- ((window-configuration-p val)
- (set-window-configuration val))
+ ((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"))
(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 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 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)
"Display what is contained in register named REGISTER.
(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
- ((integerp 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)))))
-
- ((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
- (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)
+ (if (eq yank-excluded-properties t)
+ (set-text-properties 0 (length val) nil 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))
- ((integerp val)
+ (insert-for-yank val))
+ ((numberp val)
(princ val (current-buffer)))
((and (markerp val) (marker-position val))
(princ (marker-position val) (current-buffer)))
Called from program, takes four args: REGISTER, START, END and DELETE-FLAG.
START and END are buffer positions indicating what to copy."
(interactive "cCopy to register: \nr\nP")
- (set-register register (buffer-substring start end))
+ (set-register register (filter-buffer-substring start end))
(if delete-flag (delete-region start end)))
(defun append-to-register (register start end &optional delete-flag)
(or (stringp (get-register register))
(error "Register does not contain text"))
(set-register register (concat (get-register register)
- (buffer-substring start end)))
+ (filter-buffer-substring start end)))
(if delete-flag (delete-region start end)))
(defun prepend-to-register (register start end &optional delete-flag)
(interactive "cPrepend to register: \nr\nP")
(or (stringp (get-register register))
(error "Register does not contain text"))
- (set-register register (concat (buffer-substring start end)
+ (set-register register (concat (filter-buffer-substring start end)
(get-register register)))
(if delete-flag (delete-region start end)))
(defun copy-rectangle-to-register (register start end &optional delete-flag)
"Copy rectangular region into register REGISTER.
-With prefix arg, delete as well.
-Called from program, takes four args: REGISTER, START, END and DELETE-FLAG.
+With prefix arg, delete as well. To insert this register
+in the buffer, use \\[insert-register].
+
+Called from a program, takes four args: REGISTER, START, END and DELETE-FLAG.
START and END are buffer positions giving two corners of rectangle."
(interactive "cCopy rectangle to register: \nr\nP")
(set-register register
(delete-extract-rectangle start end)
(extract-rectangle start end))))
+(provide 'register)
+;;; arch-tag: ce14dd68-8265-475f-9341-5d4ec5a53035
;;; register.el ends here