XEmacs 21.2-b1

[chise/xemacs-chise.git] / lisp / misc.el

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+;;; misc.el --- miscellaneous functions for XEmacs
+
+;; Copyright (C) 1989, 1997 Free Software Foundation, Inc.
+
+;; Maintainer: FSF
+;; Keywords: extensions, dumped
+
+;; This file is part of XEmacs.
+
+;; XEmacs is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; XEmacs 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 XEmacs; see the file COPYING.  If not, write to the Free
+;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+;; 02111-1307, USA.
+
+;;; Synched up with: FSF 19.34.
+
+;;; Commentary:
+
+;; This file is dumped with XEmacs.
+
+;; 06/11/1997 - Use char-(after|before) instead of
+;;  (following|preceding)-char. -slb
+
+;;; Code:
+
+(defun copy-from-above-command (&optional arg)
+  "Copy characters from previous nonblank line, starting just above point.
+Copy ARG characters, but not past the end of that line.
+If no argument given, copy the entire rest of the line.
+The characters copied are inserted in the buffer before point."
+  (interactive "P")
+  (let ((cc (current-column))
+       n
+       (string ""))
+    (save-excursion
+      (beginning-of-line)
+      (backward-char 1)
+      (skip-chars-backward "\ \t\n")
+      (move-to-column cc)
+      ;; Default is enough to copy the whole rest of the line.
+      (setq n (if arg (prefix-numeric-value arg) (point-max)))
+      ;; If current column winds up in middle of a tab,
+      ;; copy appropriate number of "virtual" space chars.
+      (if (< cc (current-column))
+         (if (eq (char-before (point)) ?\t)
+             (progn
+               (setq string (make-string (min n (- (current-column) cc)) ?\ ))
+               (setq n (- n (min n (- (current-column) cc)))))
+           ;; In middle of ctl char => copy that whole char.
+           (backward-char 1)))
+      (setq string (concat string
+                          (buffer-substring
+                           (point)
+                           (min (save-excursion (end-of-line) (point))
+                                (+ n (point)))))))
+    (insert string)))
+
+;;; misc.el ends here