Initial revision

lisp/emacs-lisp/lisp.el

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+;; Lisp editing commands for Emacs
+;; Copyright (C) 1985, 1986 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
+;; the Free Software Foundation; either version 1, or (at your option)
+;; 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.
+
+
+(defvar defun-prompt-regexp nil
+  "Non-nil => regexp to ignore, before the `(' that starts a defun.")
+
+(defun forward-sexp (&optional arg)
+  "Move forward across one balanced expression (sexp).
+With argument, do it that many times.
+Negative arg -N means move backward across N balanced expressions."
+  (interactive "p")
+  (or arg (setq arg 1))
+  (goto-char (or (scan-sexps (point) arg) (buffer-end arg)))
+  (if (< arg 0) (backward-prefix-chars)))
+
+(defun backward-sexp (&optional arg)
+  "Move backward across one balanced expression (sexp).
+With argument, do it that many times.
+Negative arg -N means move forward across N balanced expressions."
+  (interactive "p")
+  (or arg (setq arg 1))
+  (forward-sexp (- arg)))
+
+(defun mark-sexp (arg)
+  "Set mark ARG sexps from point.
+The place mark goes is the same place \\[forward-sexp] would move to
+with the same argument."
+  (interactive "p")
+  (push-mark
+    (save-excursion
+      (forward-sexp arg)
+      (point))))
+
+(defun forward-list (&optional arg)
+  "Move forward across one balanced group of parentheses.
+With argument, do it that many times.
+Negative arg -N means move backward across N groups of parentheses."
+  (interactive "p")
+  (or arg (setq arg 1))
+  (goto-char (or (scan-lists (point) arg 0) (buffer-end arg))))
+
+(defun backward-list (&optional arg)
+  "Move backward across one balanced group of parentheses.
+With argument, do it that many times.
+Negative arg -N means move forward across N groups of parentheses."
+  (interactive "p")
+  (or arg (setq arg 1))
+  (forward-list (- arg)))
+
+(defun down-list (arg)
+  "Move forward down one level of parentheses.
+With argument, do this that many times.
+A negative argument means move backward but still go down a level.
+In Lisp programs, an argument is required."
+  (interactive "p")
+  (let ((inc (if (> arg 0) 1 -1)))
+    (while (/= arg 0)
+      (goto-char (or (scan-lists (point) inc -1) (buffer-end arg)))
+      (setq arg (- arg inc)))))
+
+(defun backward-up-list (arg)
+  "Move backward out of one level of parentheses.
+With argument, do this that many times.
+A negative argument means move forward but still to a less deep spot.
+In Lisp programs, an argument is required."
+  (interactive "p")
+  (up-list (- arg)))
+
+(defun up-list (arg) 
+  "Move forward out of one level of parentheses.
+With argument, do this that many times.
+A negative argument means move backward but still to a less deep spot.
+In Lisp programs, an argument is required."
+  (interactive "p")
+  (let ((inc (if (> arg 0) 1 -1)))
+    (while (/= arg 0)
+      (goto-char (or (scan-lists (point) inc 1) (buffer-end arg)))
+      (setq arg (- arg inc)))))
+
+(defun kill-sexp (arg)
+  "Kill the sexp (balanced expression) following the cursor.
+With argument, kill that many sexps after the cursor.
+Negative arg -N means kill N sexps before the cursor."
+  (interactive "p")
+  (let ((opoint (point)))
+    (forward-sexp arg)
+    (kill-region opoint (point))))
+
+(defun backward-kill-sexp (arg)
+  "Kill the sexp (balanced expression) preceding the cursor.
+With argument, kill that many sexps before the cursor.
+Negative arg -N means kill N sexps after the cursor."
+  (interactive "p")
+  (kill-sexp (- arg)))
+
+(defun beginning-of-defun (&optional arg)
+  "Move backward to the beginning of a defun.
+With argument, do it that many times.  Negative arg -N
+means move forward to Nth following beginning of defun.
+Returns t unless search stops due to beginning or end of buffer.
+
+Normally a defun starts when there is an char with open-parenthesis
+syntax at the beginning of a line.  If `defun-prompt-regexp' is
+non-nil, then a string which matches that regexp may precede the
+open-parenthesis."
+  (interactive "p")
+  (and arg (< arg 0) (forward-char 1))
+  (and (re-search-backward (if defun-prompt-regexp
+			       (concat "^\\s(\\|"
+				       "\\(" defun-prompt-regexp "\\)\\s(")
+			     "^\\s(")
+			   nil 'move (or arg 1))
+       (progn (beginning-of-line) t)))
+
+(defun buffer-end (arg)
+  (if (> arg 0) (point-max) (point-min)))
+
+(defun end-of-defun (&optional arg)
+  "Move forward to next end of defun.  With argument, do it that many times.
+Negative argument -N means move back to Nth preceding end of defun.
+
+An end of a defun occurs right after the close-parenthesis that matches
+the open-parenthesis that starts a defun; see `beginning-of-defun'."
+  (interactive "p")
+  (if (or (null arg) (= arg 0)) (setq arg 1))
+  (let ((first t))
+    (while (and (> arg 0) (< (point) (point-max)))
+      (let ((pos (point)) npos)
+	(while (progn
+		(if (and first
+			 (progn
+			  (forward-char 1)
+			  (beginning-of-defun 1)))
+		    nil
+		  (or (bobp) (forward-char -1))
+		  (beginning-of-defun -1))
+		(setq first nil)
+		(forward-list 1)
+		(skip-chars-forward " \t")
+		(if (looking-at "\\s<\\|\n")
+		    (forward-line 1))
+		(<= (point) pos))))
+      (setq arg (1- arg)))
+    (while (< arg 0)
+      (let ((pos (point)))
+	(beginning-of-defun 1)
+	(forward-sexp 1)
+	(forward-line 1)
+	(if (>= (point) pos)
+	    (if (beginning-of-defun 2)
+		(progn
+		  (forward-list 1)
+		  (skip-chars-forward " \t")
+		  (if (looking-at "[;\n]")
+		      (forward-line 1)))
+	      (goto-char (point-min)))))
+      (setq arg (1+ arg)))))
+
+(defun mark-defun ()
+  "Put mark at end of this defun, point at beginning.
+The defun marked is the one that contains point or follows point."
+  (interactive)
+  (push-mark (point))
+  (end-of-defun)
+  (push-mark (point))
+  (beginning-of-defun)
+  (re-search-backward "^\n" (- (point) 1) t))
+
+(defun insert-parentheses (arg)
+  "Put parentheses around next ARG sexps.  Leave point after open-paren.
+No argument is equivalent to zero: just insert () and leave point between."
+  (interactive "P")
+  (if arg (skip-chars-forward " \t"))
+  (and (memq (char-syntax (preceding-char)) '(?w ?_ ?\) ))
+       (insert " "))
+;    (or (memq (char-syntax (preceding-char)) '(?\  ?> ?\( ))
+;	(insert " ")))
+  (insert ?\()
+  (save-excursion
+    (if arg
+	(forward-sexp (prefix-numeric-value arg)))
+    (insert ?\))
+;    (or (memq (char-syntax (following-char)) '(?\  ?> ?\( ))
+;	(insert " "))
+  (and (memq (char-syntax (following-char)) '(?w ?_ ?\( ))
+       (insert " "))
+  ))
+
+(defun move-past-close-and-reindent ()
+  "Move past next `)', delete indentation before it, then indent after it."
+  (interactive)
+  (up-list 1)
+  (forward-char -1)
+  (while (save-excursion		; this is my contribution
+	   (let ((before-paren (point)))
+	     (back-to-indentation)
+	     (= (point) before-paren)))
+    (delete-indentation))
+  (forward-char 1)
+  (newline-and-indent))
+
+(defun lisp-complete-symbol ()
+  "Perform completion on Lisp symbol preceding point.
+That symbol is compared against the symbols that exist
+and any additional characters determined by what is there
+are inserted.
+If the symbol starts just after an open-parenthesis,
+only symbols with function definitions are considered.
+Otherwise, all symbols with function definitions, values
+or properties are considered."
+  (interactive)
+  (let* ((end (point))
+	 (buffer-syntax (syntax-table))
+	 (beg (save-excursion
+		(set-syntax-table lisp-mode-syntax-table)
+		(backward-sexp 1)
+		(while (= (char-syntax (following-char)) ?\')
+		  (forward-char 1))
+		(point)
+		(set-syntax-table buffer-syntax)))
+	 (pattern (buffer-substring beg end))
+	 (predicate
+	  (if (eq (char-after (1- beg)) ?\()
+	      'fboundp
+	    (function (lambda (sym)
+			(or (boundp sym) (fboundp sym)
+			    (symbol-plist sym))))))
+	 (completion (try-completion pattern obarray predicate)))
+    (cond ((eq completion t))
+	  ((null completion)
+	   (message "Can't find completion for \"%s\"" pattern)
+	   (ding))
+	  ((not (string= pattern completion))
+	   (delete-region beg end)
+	   (insert completion))
+	  (t
+	   (message "Making completion list...")
+	   (let ((list (all-completions pattern obarray predicate)))
+	     (or (eq predicate 'fboundp)
+		 (let (new)
+		   (while list
+		     (setq new (cons (if (fboundp (intern (car list)))
+					 (list (car list) " <f>")
+				       (car list))
+				     new))
+		     (setq list (cdr list)))
+		   (setq list (nreverse new))))
+	     (with-output-to-temp-buffer " *Completions*"
+	       (display-completion-list list)))
+	   (message "Making completion list...%s" "done")))))