register.el 7.57 KB
Newer Older
Eric S. Raymond's avatar
Eric S. Raymond committed
1 2
;;; register.el --- register commands for Emacs.

Eric S. Raymond's avatar
Eric S. Raymond committed
3
;; Maintainer: FSF
Eric S. Raymond's avatar
Eric S. Raymond committed
4
;; Last-Modified: 09 Jul 1992
Eric S. Raymond's avatar
Eric S. Raymond committed
5
;; Keywords: internal
Eric S. Raymond's avatar
Eric S. Raymond committed
6

Richard M. Stallman's avatar
Richard M. Stallman committed
7 8 9 10 11 12
;; Copyright (C) 1985 Free Software Foundation, Inc.

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
Eric S. Raymond's avatar
Eric S. Raymond committed
13
;; the Free Software Foundation; either version 2, or (at your option)
Richard M. Stallman's avatar
Richard M. Stallman committed
14 15 16 17 18 19 20 21 22 23 24
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; 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.

Eric S. Raymond's avatar
Eric S. Raymond committed
25
;;; Code:
Richard M. Stallman's avatar
Richard M. Stallman committed
26 27 28 29

(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,
Jim Blandy's avatar
Jim Blandy committed
30
frame configuration, mark or list.
31
A list represents a rectangle; its elements are strings.")
Richard M. Stallman's avatar
Richard M. Stallman committed
32 33 34 35 36 37

(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)
Jim Blandy's avatar
Jim Blandy committed
38
  "Set contents of Emacs register named CHAR to VALUE.  Returns VALUE."
Richard M. Stallman's avatar
Richard M. Stallman committed
39 40 41 42 43 44 45
  (let ((aelt (assq char register-alist)))
    (if aelt
	(setcdr aelt value)
      (setq aelt (cons char value))
      (setq register-alist (cons aelt register-alist)))
    value))

46 47
(defun point-to-register (char arg)
  "Store current location of point in register REGISTER.
Jim Blandy's avatar
Jim Blandy committed
48
With prefix argument, store current frame configuration.
49
Use \\[jump-to-register] to go to that location or restore that configuration.
Richard M. Stallman's avatar
Richard M. Stallman committed
50
Argument is a character, naming the register."
51
  (interactive "cPoint to register: \nP")
Jim Blandy's avatar
Jim Blandy committed
52
  (set-register char (if arg (current-frame-configuration) (point-marker))))
Richard M. Stallman's avatar
Richard M. Stallman committed
53

54 55 56 57 58 59 60 61 62 63 64 65 66 67
(defun window-configuration-to-register (char 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 "cPoint to register: \nP")
  (set-register char (current-window-configuration)))

(defun frame-configuration-to-register (char 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")
  (set-register char (current-frame-configuration)))

Richard M. Stallman's avatar
Richard M. Stallman committed
68 69 70
(fset 'register-to-point 'jump-to-register)
(defun jump-to-register (char)
  "Move point to location stored in a register.
71 72
If the register contains a window configuration (one frame) or a frame
configuration (all frames), restore that frame or all frames accordingly.
Richard M. Stallman's avatar
Richard M. Stallman committed
73 74 75
Argument is a character, naming the register."
  (interactive "cJump to register: ")
  (let ((val (get-register char)))
76
    (condition-case ()
Jim Blandy's avatar
Jim Blandy committed
77
	(set-frame-configuration val)
78
      (error
79 80 81 82 83 84 85
       (if (window-configuration-p val)
	   (set-window-configuration val)
	 (if (markerp val)
	     (progn
	       (switch-to-buffer (marker-buffer val))
	       (goto-char val))
	   (error "Register doesn't contain a buffer position or configuration")))))))
Richard M. Stallman's avatar
Richard M. Stallman committed
86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161

;(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)
  "Display what is contained in register named REGISTER.
REGISTER is a character."
  (interactive "cView register: ")
  (let ((val (get-register char)))
    (if (null val)
	(message "Register %s is empty" (single-key-description char))
      (with-output-to-temp-buffer "*Output*"
	(princ "Register ")
	(princ (single-key-description char))
	(princ " contains ")
	(if (integerp val)
	    (princ val)
	  (if (markerp val)
	      (progn
		(princ "a buffer position:\nbuffer ")
		(princ (buffer-name (marker-buffer val)))
		(princ ", position ")
		(princ (+ 0 val)))
	    (if (consp val)
		(progn
		  (princ "the rectangle:\n")
		  (while val
		    (princ (car val))
		    (terpri)
		    (setq val (cdr val))))
	      (princ "the string:\n")
	      (princ val))))))))

(defun insert-register (char &optional arg)
  "Insert contents of register REG.  REG is a character.
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")
  (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")))))
  (if (not arg) (exchange-point-and-mark)))

(defun copy-to-register (char start end &optional delete-flag)
Jim Blandy's avatar
Jim Blandy committed
162 163
  "Copy region into register REG.  With prefix arg, delete as well.
Called from program, takes four args: REG, START, END and DELETE-FLAG.
Richard M. Stallman's avatar
Richard M. Stallman committed
164 165 166 167 168 169
START and END are buffer positions indicating what to copy."
  (interactive "cCopy to register: \nr\nP")
  (set-register char (buffer-substring start end))
  (if delete-flag (delete-region start end)))

(defun append-to-register (char start end &optional delete-flag)
Jim Blandy's avatar
Jim Blandy committed
170 171
  "Append region to text in register REG.  With prefix arg, delete as well.
Called from program, takes four args: REG, START, END and DELETE-FLAG.
Richard M. Stallman's avatar
Richard M. Stallman committed
172 173 174 175 176 177 178 179 180
START and END are buffer positions indicating what to append."
  (interactive "cAppend to register: \nr\nP")
  (or (stringp (get-register char))
      (error "Register does not contain text"))
  (set-register char (concat (get-register char)
			     (buffer-substring start end)))
  (if delete-flag (delete-region start end)))

(defun prepend-to-register (char start end &optional delete-flag)
Jim Blandy's avatar
Jim Blandy committed
181 182
  "Prepend region to text in register REG.  With prefix arg, delete as well.
Called from program, takes four args: REG, START, END and DELETE-FLAG.
Richard M. Stallman's avatar
Richard M. Stallman committed
183 184 185 186 187 188 189 190 191
START and END are buffer positions indicating what to prepend."
  (interactive "cPrepend to register: \nr\nP")
  (or (stringp (get-register char))
      (error "Register does not contain text"))
  (set-register char (concat (buffer-substring start end)
			     (get-register char)))
  (if delete-flag (delete-region start end)))

(defun copy-rectangle-to-register (char start end &optional delete-flag)
Jim Blandy's avatar
Jim Blandy committed
192 193
  "Copy rectangular region into register REG.  With prefix arg, delete as well.
Called from program, takes four args: REG, START, END and DELETE-FLAG.
Richard M. Stallman's avatar
Richard M. Stallman committed
194 195 196 197 198 199
START and END are buffer positions giving two corners of rectangle."
  (interactive "cCopy rectangle to register: \nr\nP")
  (set-register char
		(if delete-flag
		    (delete-extract-rectangle start end)
		  (extract-rectangle start end))))
Eric S. Raymond's avatar
Eric S. Raymond committed
200 201

;;; register.el ends here