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authorroot1990-08-27 04:15:41 +0000
committerroot1990-08-27 04:15:41 +0000
commitb73b9811e079c5bbadf13e99390cc73324129f14 (patch)
tree528a679b50c752df2ae18da750ec1e6cc4071194
parent994fd4add47f5bf44cd75f69e493092406eb4d6a (diff)
downloademacs-b73b9811e079c5bbadf13e99390cc73324129f14.tar.gz
emacs-b73b9811e079c5bbadf13e99390cc73324129f14.zip
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1;; Lisp editing commands for Emacs
2;; Copyright (C) 1985, 1986 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 defun-prompt-regexp nil
22 "Non-nil => regexp to ignore, before the `(' that starts a defun.")
23
24(defun forward-sexp (&optional arg)
25 "Move forward across one balanced expression (sexp).
26With argument, do it that many times.
27Negative arg -N means move backward across N balanced expressions."
28 (interactive "p")
29 (or arg (setq arg 1))
30 (goto-char (or (scan-sexps (point) arg) (buffer-end arg)))
31 (if (< arg 0) (backward-prefix-chars)))
32
33(defun backward-sexp (&optional arg)
34 "Move backward across one balanced expression (sexp).
35With argument, do it that many times.
36Negative arg -N means move forward across N balanced expressions."
37 (interactive "p")
38 (or arg (setq arg 1))
39 (forward-sexp (- arg)))
40
41(defun mark-sexp (arg)
42 "Set mark ARG sexps from point.
43The place mark goes is the same place \\[forward-sexp] would move to
44with the same argument."
45 (interactive "p")
46 (push-mark
47 (save-excursion
48 (forward-sexp arg)
49 (point))))
50
51(defun forward-list (&optional arg)
52 "Move forward across one balanced group of parentheses.
53With argument, do it that many times.
54Negative arg -N means move backward across N groups of parentheses."
55 (interactive "p")
56 (or arg (setq arg 1))
57 (goto-char (or (scan-lists (point) arg 0) (buffer-end arg))))
58
59(defun backward-list (&optional arg)
60 "Move backward across one balanced group of parentheses.
61With argument, do it that many times.
62Negative arg -N means move forward across N groups of parentheses."
63 (interactive "p")
64 (or arg (setq arg 1))
65 (forward-list (- arg)))
66
67(defun down-list (arg)
68 "Move forward down one level of parentheses.
69With argument, do this that many times.
70A negative argument means move backward but still go down a level.
71In Lisp programs, an argument is required."
72 (interactive "p")
73 (let ((inc (if (> arg 0) 1 -1)))
74 (while (/= arg 0)
75 (goto-char (or (scan-lists (point) inc -1) (buffer-end arg)))
76 (setq arg (- arg inc)))))
77
78(defun backward-up-list (arg)
79 "Move backward out of one level of parentheses.
80With argument, do this that many times.
81A negative argument means move forward but still to a less deep spot.
82In Lisp programs, an argument is required."
83 (interactive "p")
84 (up-list (- arg)))
85
86(defun up-list (arg)
87 "Move forward out of one level of parentheses.
88With argument, do this that many times.
89A negative argument means move backward but still to a less deep spot.
90In Lisp programs, an argument is required."
91 (interactive "p")
92 (let ((inc (if (> arg 0) 1 -1)))
93 (while (/= arg 0)
94 (goto-char (or (scan-lists (point) inc 1) (buffer-end arg)))
95 (setq arg (- arg inc)))))
96
97(defun kill-sexp (arg)
98 "Kill the sexp (balanced expression) following the cursor.
99With argument, kill that many sexps after the cursor.
100Negative arg -N means kill N sexps before the cursor."
101 (interactive "p")
102 (let ((opoint (point)))
103 (forward-sexp arg)
104 (kill-region opoint (point))))
105
106(defun backward-kill-sexp (arg)
107 "Kill the sexp (balanced expression) preceding the cursor.
108With argument, kill that many sexps before the cursor.
109Negative arg -N means kill N sexps after the cursor."
110 (interactive "p")
111 (kill-sexp (- arg)))
112
113(defun beginning-of-defun (&optional arg)
114 "Move backward to the beginning of a defun.
115With argument, do it that many times. Negative arg -N
116means move forward to Nth following beginning of defun.
117Returns t unless search stops due to beginning or end of buffer.
118
119Normally a defun starts when there is an char with open-parenthesis
120syntax at the beginning of a line. If `defun-prompt-regexp' is
121non-nil, then a string which matches that regexp may precede the
122open-parenthesis."
123 (interactive "p")
124 (and arg (< arg 0) (forward-char 1))
125 (and (re-search-backward (if defun-prompt-regexp
126 (concat "^\\s(\\|"
127 "\\(" defun-prompt-regexp "\\)\\s(")
128 "^\\s(")
129 nil 'move (or arg 1))
130 (progn (beginning-of-line) t)))
131
132(defun buffer-end (arg)
133 (if (> arg 0) (point-max) (point-min)))
134
135(defun end-of-defun (&optional arg)
136 "Move forward to next end of defun. With argument, do it that many times.
137Negative argument -N means move back to Nth preceding end of defun.
138
139An end of a defun occurs right after the close-parenthesis that matches
140the open-parenthesis that starts a defun; see `beginning-of-defun'."
141 (interactive "p")
142 (if (or (null arg) (= arg 0)) (setq arg 1))
143 (let ((first t))
144 (while (and (> arg 0) (< (point) (point-max)))
145 (let ((pos (point)) npos)
146 (while (progn
147 (if (and first
148 (progn
149 (forward-char 1)
150 (beginning-of-defun 1)))
151 nil
152 (or (bobp) (forward-char -1))
153 (beginning-of-defun -1))
154 (setq first nil)
155 (forward-list 1)
156 (skip-chars-forward " \t")
157 (if (looking-at "\\s<\\|\n")
158 (forward-line 1))
159 (<= (point) pos))))
160 (setq arg (1- arg)))
161 (while (< arg 0)
162 (let ((pos (point)))
163 (beginning-of-defun 1)
164 (forward-sexp 1)
165 (forward-line 1)
166 (if (>= (point) pos)
167 (if (beginning-of-defun 2)
168 (progn
169 (forward-list 1)
170 (skip-chars-forward " \t")
171 (if (looking-at "[;\n]")
172 (forward-line 1)))
173 (goto-char (point-min)))))
174 (setq arg (1+ arg)))))
175
176(defun mark-defun ()
177 "Put mark at end of this defun, point at beginning.
178The defun marked is the one that contains point or follows point."
179 (interactive)
180 (push-mark (point))
181 (end-of-defun)
182 (push-mark (point))
183 (beginning-of-defun)
184 (re-search-backward "^\n" (- (point) 1) t))
185
186(defun insert-parentheses (arg)
187 "Put parentheses around next ARG sexps. Leave point after open-paren.
188No argument is equivalent to zero: just insert () and leave point between."
189 (interactive "P")
190 (if arg (skip-chars-forward " \t"))
191 (and (memq (char-syntax (preceding-char)) '(?w ?_ ?\) ))
192 (insert " "))
193; (or (memq (char-syntax (preceding-char)) '(?\ ?> ?\( ))
194; (insert " ")))
195 (insert ?\()
196 (save-excursion
197 (if arg
198 (forward-sexp (prefix-numeric-value arg)))
199 (insert ?\))
200; (or (memq (char-syntax (following-char)) '(?\ ?> ?\( ))
201; (insert " "))
202 (and (memq (char-syntax (following-char)) '(?w ?_ ?\( ))
203 (insert " "))
204 ))
205
206(defun move-past-close-and-reindent ()
207 "Move past next `)', delete indentation before it, then indent after it."
208 (interactive)
209 (up-list 1)
210 (forward-char -1)
211 (while (save-excursion ; this is my contribution
212 (let ((before-paren (point)))
213 (back-to-indentation)
214 (= (point) before-paren)))
215 (delete-indentation))
216 (forward-char 1)
217 (newline-and-indent))
218
219(defun lisp-complete-symbol ()
220 "Perform completion on Lisp symbol preceding point.
221That symbol is compared against the symbols that exist
222and any additional characters determined by what is there
223are inserted.
224If the symbol starts just after an open-parenthesis,
225only symbols with function definitions are considered.
226Otherwise, all symbols with function definitions, values
227or properties are considered."
228 (interactive)
229 (let* ((end (point))
230 (buffer-syntax (syntax-table))
231 (beg (save-excursion
232 (set-syntax-table lisp-mode-syntax-table)
233 (backward-sexp 1)
234 (while (= (char-syntax (following-char)) ?\')
235 (forward-char 1))
236 (point)
237 (set-syntax-table buffer-syntax)))
238 (pattern (buffer-substring beg end))
239 (predicate
240 (if (eq (char-after (1- beg)) ?\()
241 'fboundp
242 (function (lambda (sym)
243 (or (boundp sym) (fboundp sym)
244 (symbol-plist sym))))))
245 (completion (try-completion pattern obarray predicate)))
246 (cond ((eq completion t))
247 ((null completion)
248 (message "Can't find completion for \"%s\"" pattern)
249 (ding))
250 ((not (string= pattern completion))
251 (delete-region beg end)
252 (insert completion))
253 (t
254 (message "Making completion list...")
255 (let ((list (all-completions pattern obarray predicate)))
256 (or (eq predicate 'fboundp)
257 (let (new)
258 (while list
259 (setq new (cons (if (fboundp (intern (car list)))
260 (list (car list) " <f>")
261 (car list))
262 new))
263 (setq list (cdr list)))
264 (setq list (nreverse new))))
265 (with-output-to-temp-buffer " *Completions*"
266 (display-completion-list list)))
267 (message "Making completion list...%s" "done")))))