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Annotation of GNUtools/emacs/lisp/register.el, revision 1.1

1.1     ! root        1: ;; Register commands for Emacs.
        !             2: ;; Copyright (C) 1985 Free Software Foundation, Inc.
        !             3: 
        !             4: ;; This file is part of GNU Emacs.
        !             5: 
        !             6: ;; GNU Emacs is free software; you can redistribute it and/or modify
        !             7: ;; it under the terms of the GNU General Public License as published by
        !             8: ;; the Free Software Foundation; either version 1, or (at your option)
        !             9: ;; any later version.
        !            10: 
        !            11: ;; GNU Emacs is distributed in the hope that it will be useful,
        !            12: ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13: ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14: ;; GNU General Public License for more details.
        !            15: 
        !            16: ;; You should have received a copy of the GNU General Public License
        !            17: ;; along with GNU Emacs; see the file COPYING.  If not, write to
        !            18: ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
        !            19: 
        !            20: 
        !            21: (defvar register-alist nil
        !            22:   "Alist of elements (NAME . CONTENTS), one for each Emacs register.
        !            23: NAME is a character (a number).  CONTENTS is a string, number,
        !            24: mark or list.  A list represents a rectangle; its elements are strings.")
        !            25: 
        !            26: (defun get-register (char)
        !            27:   "Return contents of Emacs register named CHAR, or nil if none."
        !            28:   (cdr (assq char register-alist)))
        !            29: 
        !            30: (defun set-register (char value)
        !            31:   "Set contents of Emacs register named CHAR to VALUE."
        !            32:   (let ((aelt (assq char register-alist)))
        !            33:     (if aelt
        !            34:        (setcdr aelt value)
        !            35:       (setq aelt (cons char value))
        !            36:       (setq register-alist (cons aelt register-alist)))))
        !            37: 
        !            38: (defun point-to-register (char)
        !            39:   "Store current location of point in a register.
        !            40: Argument is a character, naming the register."
        !            41:   (interactive "cPoint to register: ")
        !            42:   (set-register char (point-marker)))
        !            43: 
        !            44: (defun register-to-point (char)
        !            45:   "Move point to location stored in a register.
        !            46: Argument is a character, naming the register."
        !            47:   (interactive "cRegister to point: ")
        !            48:   (let ((val (get-register char)))
        !            49:     (if (markerp val)
        !            50:        (progn
        !            51:          (switch-to-buffer (marker-buffer val))
        !            52:          (goto-char val))
        !            53:       (error "Register doesn't contain a buffer position"))))
        !            54: 
        !            55: ;(defun number-to-register (arg char)
        !            56: ;  "Store a number in a register.
        !            57: ;Two args, NUMBER and REGISTER (a character, naming the register).
        !            58: ;If NUMBER is nil, digits in the buffer following point are read
        !            59: ;to get the number to store.
        !            60: ;Interactively, NUMBER is the prefix arg (none means nil)."
        !            61: ;  (interactive "P\ncNumber to register: ")
        !            62: ;  (set-register char 
        !            63: ;              (if arg
        !            64: ;                  (prefix-numeric-value arg)
        !            65: ;                (if (looking-at "[0-9][0-9]*")
        !            66: ;                    (save-excursion
        !            67: ;                     (save-restriction
        !            68: ;                      (narrow-to-region (point)
        !            69: ;                                        (progn (skip-chars-forward "0-9")
        !            70: ;                                               (point)))
        !            71: ;                      (goto-char (point-min))
        !            72: ;                      (read (current-buffer))))
        !            73: ;                  0))))
        !            74: 
        !            75: ;(defun increment-register (arg char)
        !            76: ;  "Add NUMBER to the contents of register REGISTER.
        !            77: ;Interactively, NUMBER is the prefix arg (none means nil)." 
        !            78: ;  (interactive "p\ncNumber to register: ")
        !            79: ;  (or (integerp (get-register char))
        !            80: ;      (error "Register does not contain a number"))
        !            81: ;  (set-register char (+ arg (get-register char))))
        !            82: 
        !            83: (defun view-register (char)
        !            84:   "Display what is contained in register named REGISTER.
        !            85: REGISTER is a character."
        !            86:   (interactive "cView register: ")
        !            87:   (let ((val (get-register char)))
        !            88:     (if (null val)
        !            89:        (message "Register %s is empty" (single-key-description char))
        !            90:       (with-output-to-temp-buffer "*Output*"
        !            91:        (princ "Register ")
        !            92:        (princ (single-key-description char))
        !            93:        (princ " contains ")
        !            94:        (if (integerp val)
        !            95:            (princ val)
        !            96:          (if (markerp val)
        !            97:              (progn
        !            98:                (princ "a buffer position:\nbuffer ")
        !            99:                (princ (buffer-name (marker-buffer val)))
        !           100:                (princ ", position ")
        !           101:                (princ (+ 0 val)))
        !           102:            (if (consp val)
        !           103:                (progn
        !           104:                  (princ "the rectangle:\n")
        !           105:                  (while val
        !           106:                    (princ (car val))
        !           107:                    (terpri)
        !           108:                    (setq val (cdr val))))
        !           109:              (princ "the string:\n")
        !           110:              (princ val))))))))
        !           111: 
        !           112: (defun insert-register (char &optional arg)
        !           113:   "Insert contents of register REG.  REG is a character.
        !           114: Normally puts point before and mark after the inserted text.
        !           115: If optional second arg is non-nil, puts mark before and point after.
        !           116: Interactively, second arg is non-nil if prefix arg is supplied."
        !           117:   (interactive "cInsert register: \nP")
        !           118:   (push-mark)
        !           119:   (let ((val (get-register char)))
        !           120:     (if (consp val)
        !           121:        (insert-rectangle val)
        !           122:       (if (stringp val)
        !           123:          (insert val)
        !           124:        (if (or (integerp val) (markerp val))
        !           125:            (princ (+ 0 val) (current-buffer))
        !           126:          (error "Register does not contain text")))))
        !           127:   (or arg (exchange-point-and-mark)))
        !           128: 
        !           129: (defun copy-to-register (char start end &optional delete-flag)
        !           130:   "Copy region into register REG.
        !           131: With prefix arg, delete as well.
        !           132: Called from program, takes four args:
        !           133: REG, START, END and DELETE-FLAG.
        !           134: START and END are buffer positions indicating what to copy."
        !           135:   (interactive "cCopy to register: \nr\nP")
        !           136:   (set-register char (buffer-substring start end))
        !           137:   (if delete-flag (delete-region start end)))
        !           138: 
        !           139: (defun append-to-register (char start end &optional delete-flag)
        !           140:   "Append region to text in register REG.
        !           141: With prefix arg, delete as well.
        !           142: Called from program, takes four args:
        !           143: REG, START, END and DELETE-FLAG.
        !           144: START and END are buffer positions indicating what to append."
        !           145:   (interactive "cAppend to register: \nr\nP")
        !           146:   (or (stringp (get-register char))
        !           147:       (error "Register does not contain text"))
        !           148:   (set-register char (concat (get-register char)
        !           149:                             (buffer-substring start end)))
        !           150:   (if delete-flag (delete-region start end)))
        !           151: 
        !           152: (defun prepend-to-register (char start end &optional delete-flag)
        !           153:   "Prepend region to text in register REG.
        !           154: With prefix arg, delete as well.
        !           155: Called from program, takes four args:
        !           156: REG, START, END and DELETE-FLAG.
        !           157: START and END are buffer positions indicating what to prepend."
        !           158:   (interactive "cPrepend to register: \nr\nP")
        !           159:   (or (stringp (get-register char))
        !           160:       (error "Register does not contain text"))
        !           161:   (set-register char (concat (buffer-substring start end)
        !           162:                             (get-register char)))
        !           163:   (if delete-flag (delete-region start end)))
        !           164: 
        !           165: (defun copy-rectangle-to-register (char start end &optional delete-flag)
        !           166:   "Copy rectangular region into register REG.
        !           167: With prefix arg, delete as well.
        !           168: Called from program, takes four args:
        !           169: REG, START, END and DELETE-FLAG.
        !           170: START and END are buffer positions giving two corners of rectangle."
        !           171:   (interactive "cCopy rectangle to register: \nr\nP")
        !           172:   (set-register char
        !           173:                (if delete-flag
        !           174:                    (delete-extract-rectangle start end)
        !           175:                  (extract-rectangle start end))))

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