1 ;;; simple.el --- basic editing commands for Emacs
3 ;; Copyright (C) 1985, 86, 87, 93, 94, 95, 96, 97, 98, 99, 2000
4 ;; Free Software Foundation, Inc.
6 ;; This file is part of GNU Emacs.
8 ;; GNU Emacs is free software; you can redistribute it and/or modify
9 ;; it under the terms of the GNU General Public License as published by
10 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; GNU Emacs is distributed in the hope that it will be useful,
14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ;; GNU General Public License for more details.
18 ;; You should have received a copy of the GNU General Public License
19 ;; along with GNU Emacs; see the file COPYING. If not, write to the
20 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 ;; Boston, MA 02111-1307, USA.
25 ;; A grab-bag of basic Emacs commands not specifically related to some
26 ;; major mode or to file-handling.
31 (autoload 'widget-convert
"wid-edit")
32 (autoload 'shell-mode
"shell")
37 "Killing and yanking commands"
40 (defgroup paren-matching nil
41 "Highlight (un)matching of parens and expressions."
45 (defun fundamental-mode ()
46 "Major mode not specialized for anything in particular.
47 Other major modes are defined by comparison with this one."
49 (kill-all-local-variables))
51 ;; Making and deleting lines.
53 (defun newline (&optional arg
)
54 "Insert a newline, and move to left margin of the new line if it's blank.
55 The newline is marked with the text-property `hard'.
56 With ARG, insert that many newlines.
57 In Auto Fill mode, if no numeric arg, break the preceding line if it's long."
59 (barf-if-buffer-read-only)
60 ;; Inserting a newline at the end of a line produces better redisplay in
61 ;; try_window_id than inserting at the beginning of a line, and the textual
62 ;; result is the same. So, if we're at beginning of line, pretend to be at
63 ;; the end of the previous line.
64 (let ((flag (and (not (bobp))
66 ;; Make sure no functions want to be told about
67 ;; the range of the changes.
68 (not after-change-functions
)
69 (not before-change-functions
)
70 ;; Make sure there are no markers here.
71 (not (buffer-has-markers-at (1- (point))))
72 (not (buffer-has-markers-at (point)))
73 ;; Make sure no text properties want to know
74 ;; where the change was.
75 (not (get-char-property (1- (point)) 'modification-hooks
))
76 (not (get-char-property (1- (point)) 'insert-behind-hooks
))
78 (not (get-char-property (point) 'insert-in-front-hooks
)))
79 ;; Make sure the newline before point isn't intangible.
80 (not (get-char-property (1- (point)) 'intangible
))
81 ;; Make sure the newline before point isn't read-only.
82 (not (get-char-property (1- (point)) 'read-only
))
83 ;; Make sure the newline before point isn't invisible.
84 (not (get-char-property (1- (point)) 'invisible
))
85 ;; Make sure the newline before point has the same
86 ;; properties as the char before it (if any).
87 (< (or (previous-property-change (point)) -
2)
89 (was-page-start (and (bolp)
90 (looking-at page-delimiter
)))
92 (if flag
(backward-char 1))
93 ;; Call self-insert so that auto-fill, abbrev expansion etc. happens.
94 ;; Set last-command-char to tell self-insert what to insert.
95 (let ((last-command-char ?
\n)
96 ;; Don't auto-fill if we have a numeric argument.
97 ;; Also not if flag is true (it would fill wrong line);
98 ;; there is no need to since we're at BOL.
99 (auto-fill-function (if (or arg flag
) nil auto-fill-function
)))
101 (self-insert-command (prefix-numeric-value arg
))
102 ;; If we get an error in self-insert-command, put point at right place.
103 (if flag
(forward-char 1))))
104 ;; Even if we did *not* get an error, keep that forward-char;
105 ;; all further processing should apply to the newline that the user
106 ;; thinks he inserted.
108 ;; Mark the newline(s) `hard'.
109 (if use-hard-newlines
110 (set-hard-newline-properties
111 (- (point) (if arg
(prefix-numeric-value arg
) 1)) (point)))
112 ;; If the newline leaves the previous line blank,
113 ;; and we have a left margin, delete that from the blank line.
116 (goto-char beforepos
)
118 (and (looking-at "[ \t]$")
119 (> (current-left-margin) 0)
120 (delete-region (point) (progn (end-of-line) (point))))))
121 ;; Indent the line after the newline, except in one case:
122 ;; when we added the newline at the beginning of a line
123 ;; which starts a page.
125 (move-to-left-margin nil t
)))
128 (defun set-hard-newline-properties (from to
)
129 (let ((sticky (get-text-property from
'rear-nonsticky
)))
130 (put-text-property from to
'hard
't
)
131 ;; If rear-nonsticky is not "t", add 'hard to rear-nonsticky list
132 (if (and (listp sticky
) (not (memq 'hard sticky
)))
133 (put-text-property from
(point) 'rear-nonsticky
134 (cons 'hard sticky
)))))
136 (defun open-line (arg)
137 "Insert a newline and leave point before it.
138 If there is a fill prefix and/or a left-margin, insert them on the new line
139 if the line would have been blank.
140 With arg N, insert N newlines."
142 (let* ((do-fill-prefix (and fill-prefix
(bolp)))
143 (do-left-margin (and (bolp) (> (current-left-margin) 0)))
149 (if do-left-margin
(indent-to (current-left-margin)))
150 (if do-fill-prefix
(insert-and-inherit fill-prefix
))))
157 "Split current line, moving portion beyond point vertically down."
159 (skip-chars-forward " \t")
160 (let ((col (current-column))
166 (defun delete-indentation (&optional arg
)
167 "Join this line to previous and fix up whitespace at join.
168 If there is a fill prefix, delete it from the beginning of this line.
169 With argument, join this line to following line."
172 (if arg
(forward-line 1))
173 (if (eq (preceding-char) ?
\n)
175 (delete-region (point) (1- (point)))
176 ;; If the second line started with the fill prefix,
177 ;; delete the prefix.
179 (<= (+ (point) (length fill-prefix
)) (point-max))
181 (buffer-substring (point)
182 (+ (point) (length fill-prefix
)))))
183 (delete-region (point) (+ (point) (length fill-prefix
))))
184 (fixup-whitespace))))
186 (defalias 'join-line
#'delete-indentation
) ; easier to find
188 (defun delete-blank-lines ()
189 "On blank line, delete all surrounding blank lines, leaving just one.
190 On isolated blank line, delete that one.
191 On nonblank line, delete any immediately following blank lines."
193 (let (thisblank singleblank
)
196 (setq thisblank
(looking-at "[ \t]*$"))
197 ;; Set singleblank if there is just one blank line here.
200 (not (looking-at "[ \t]*\n[ \t]*$"))
202 (progn (forward-line -
1)
203 (not (looking-at "[ \t]*$")))))))
204 ;; Delete preceding blank lines, and this one too if it's the only one.
208 (if singleblank
(forward-line 1))
209 (delete-region (point)
210 (if (re-search-backward "[^ \t\n]" nil t
)
211 (progn (forward-line 1) (point))
213 ;; Delete following blank lines, unless the current line is blank
214 ;; and there are no following blank lines.
215 (if (not (and thisblank singleblank
))
219 (delete-region (point)
220 (if (re-search-forward "[^ \t\n]" nil t
)
221 (progn (beginning-of-line) (point))
223 ;; Handle the special case where point is followed by newline and eob.
224 ;; Delete the line, leaving point at eob.
225 (if (looking-at "^[ \t]*\n\\'")
226 (delete-region (point) (point-max)))))
228 (defun delete-trailing-whitespace ()
229 "Delete all the trailing whitespace across the current buffer.
230 All whitespace after the last non-whitespace character in a line is deleted.
231 This respects narrowing, created by \\[narrow-to-region] and friends."
235 (goto-char (point-min))
236 (while (re-search-forward "\\s-+$" nil t
)
237 (delete-region (match-beginning 0) (match-end 0))))))
239 (defun newline-and-indent ()
240 "Insert a newline, then indent according to major mode.
241 Indentation is done using the value of `indent-line-function'.
242 In programming language modes, this is the same as TAB.
243 In some text modes, where TAB inserts a tab, this command indents to the
244 column specified by the function `current-left-margin'."
246 (delete-region (point) (progn (skip-chars-backward " \t") (point)))
248 (indent-according-to-mode))
250 (defun reindent-then-newline-and-indent ()
251 "Reindent current line, insert newline, then indent the new line.
252 Indentation of both lines is done according to the current major mode,
253 which means calling the current value of `indent-line-function'.
254 In programming language modes, this is the same as TAB.
255 In some text modes, where TAB inserts a tab, this indents to the
256 column specified by the function `current-left-margin'."
259 (delete-region (point) (progn (skip-chars-backward " \t") (point)))
260 (indent-according-to-mode))
262 (indent-according-to-mode))
264 (defun quoted-insert (arg)
265 "Read next input character and insert it.
266 This is useful for inserting control characters.
268 If the first character you type after this command is an octal digit,
269 you should type a sequence of octal digits which specify a character code.
270 Any nondigit terminates the sequence. If the terminator is a RET,
271 it is discarded; any other terminator is used itself as input.
272 The variable `read-quoted-char-radix' specifies the radix for this feature;
273 set it to 10 or 16 to use decimal or hex instead of octal.
275 In overwrite mode, this function inserts the character anyway, and
276 does not handle octal digits specially. This means that if you use
277 overwrite as your normal editing mode, you can use this function to
278 insert characters when necessary.
280 In binary overwrite mode, this function does overwrite, and octal
281 digits are interpreted as a character code. This is intended to be
282 useful for editing binary files."
284 (let ((char (if (or (not overwrite-mode
)
285 (eq overwrite-mode
'overwrite-mode-binary
))
288 ;; Assume character codes 0240 - 0377 stand for characters in some
289 ;; single-byte character set, and convert them to Emacs
291 (if (and enable-multibyte-characters
294 (setq char
(unibyte-char-to-multibyte char
)))
296 (if (eq overwrite-mode
'overwrite-mode-binary
)
299 (insert-and-inherit char
)
300 (setq arg
(1- arg
)))))
302 (defun forward-to-indentation (arg)
303 "Move forward ARG lines and position at first nonblank character."
306 (skip-chars-forward " \t"))
308 (defun backward-to-indentation (arg)
309 "Move backward ARG lines and position at first nonblank character."
311 (forward-line (- arg
))
312 (skip-chars-forward " \t"))
314 (defun back-to-indentation ()
315 "Move point to the first non-whitespace character on this line."
317 (beginning-of-line 1)
318 (skip-chars-forward " \t"))
320 (defun fixup-whitespace ()
321 "Fixup white space between objects around point.
322 Leave one space or none, according to the context."
325 (delete-horizontal-space)
326 (if (or (looking-at "^\\|\\s)")
327 (save-excursion (forward-char -
1)
328 (looking-at "$\\|\\s(\\|\\s'")))
332 (defun delete-horizontal-space ()
333 "Delete all spaces and tabs around point."
335 (skip-chars-backward " \t")
336 (delete-region (point) (progn (skip-chars-forward " \t") (point))))
338 (defun just-one-space ()
339 "Delete all spaces and tabs around point, leaving one space."
341 (skip-chars-backward " \t")
342 (if (= (following-char) ?
)
345 (delete-region (point) (progn (skip-chars-forward " \t") (point))))
348 (defun beginning-of-buffer (&optional arg
)
349 "Move point to the beginning of the buffer; leave mark at previous position.
350 With arg N, put point N/10 of the way from the beginning.
352 If the buffer is narrowed, this command uses the beginning and size
353 of the accessible part of the buffer.
355 Don't use this command in Lisp programs!
356 \(goto-char (point-min)) is faster and avoids clobbering the mark."
359 (let ((size (- (point-max) (point-min))))
363 ;; Avoid overflow for large buffer sizes!
364 (* (prefix-numeric-value arg
)
366 (/ (+ 10 (* size
(prefix-numeric-value arg
))) 10)))
368 (if arg
(forward-line 1)))
370 (defun end-of-buffer (&optional arg
)
371 "Move point to the end of the buffer; leave mark at previous position.
372 With arg N, put point N/10 of the way from the end.
374 If the buffer is narrowed, this command uses the beginning and size
375 of the accessible part of the buffer.
377 Don't use this command in Lisp programs!
378 \(goto-char (point-max)) is faster and avoids clobbering the mark."
381 (let ((size (- (point-max) (point-min))))
385 ;; Avoid overflow for large buffer sizes!
386 (* (prefix-numeric-value arg
)
388 (/ (* size
(prefix-numeric-value arg
)) 10)))
390 ;; If we went to a place in the middle of the buffer,
391 ;; adjust it to the beginning of a line.
392 (cond (arg (forward-line 1))
393 ((< (point) (window-end nil t
))
394 ;; If the end of the buffer is not already on the screen,
395 ;; then scroll specially to put it near, but not at, the bottom.
396 (overlay-recenter (point))
399 (defun mark-whole-buffer ()
400 "Put point at beginning and mark at end of buffer.
401 You probably should not use this function in Lisp programs;
402 it is usually a mistake for a Lisp function to use any subroutine
403 that uses or sets the mark."
406 (push-mark (point-max) nil t
)
407 (goto-char (point-min)))
410 ;; Counting lines, one way or another.
412 (defun goto-line (arg)
413 "Goto line ARG, counting from line 1 at beginning of buffer."
414 (interactive "NGoto line: ")
415 (setq arg
(prefix-numeric-value arg
))
419 (if (eq selective-display t
)
420 (re-search-forward "[\n\C-m]" nil
'end
(1- arg
))
421 (forward-line (1- arg
)))))
423 (defun count-lines-region (start end
)
424 "Print number of lines and characters in the region."
426 (message "Region has %d lines, %d characters"
427 (count-lines start end
) (- end start
)))
430 "Print the current buffer line number and narrowed line number of point."
432 (let ((opoint (point)) start
)
435 (goto-char (point-min))
442 (message "line %d (narrowed line %d)"
443 (1+ (count-lines 1 (point)))
444 (1+ (count-lines start
(point))))
445 (message "Line %d" (1+ (count-lines 1 (point)))))))))
447 (defun count-lines (start end
)
448 "Return number of lines between START and END.
449 This is usually the number of newlines between them,
450 but can be one more if START is not equal to END
451 and the greater of them is not at the start of a line."
454 (narrow-to-region start end
)
455 (goto-char (point-min))
456 (if (eq selective-display t
)
459 (while (re-search-forward "[\n\C-m]" nil t
40)
460 (setq done
(+ 40 done
)))
461 (while (re-search-forward "[\n\C-m]" nil t
1)
462 (setq done
(+ 1 done
)))
463 (goto-char (point-max))
464 (if (and (/= start end
)
468 (- (buffer-size) (forward-line (buffer-size)))))))
470 (defun what-cursor-position (&optional detail
)
471 "Print info on cursor position (on screen and within buffer).
472 Also describe the character after point, and give its character code
473 in octal, decimal and hex.
475 For a non-ASCII multibyte character, also give its encoding in the
476 buffer's selected coding system if the coding system encodes the
477 character safely. If the character is encoded into one byte, that
478 code is shown in hex. If the character is encoded into more than one
479 byte, just \"...\" is shown.
481 In addition, with prefix argument, show details about that character
482 in *Help* buffer. See also the command `describe-char-after'."
484 (let* ((char (following-char))
488 (total (buffer-size))
489 (percent (if (> total
50000)
490 ;; Avoid overflow from multiplying by 100!
491 (/ (+ (/ total
200) (1- pos
)) (max (/ total
100) 1))
492 (/ (+ (/ total
2) (* 100 (1- pos
))) (max total
1))))
493 (hscroll (if (= (window-hscroll) 0)
495 (format " Hscroll=%d" (window-hscroll))))
496 (col (current-column)))
498 (if (or (/= beg
1) (/= end
(1+ total
)))
499 (message "point=%d of %d (%d%%) <%d - %d> column %d %s"
500 pos total percent beg end col hscroll
)
501 (message "point=%d of %d (%d%%) column %d %s"
502 pos total percent col hscroll
))
503 (let ((coding buffer-file-coding-system
)
504 encoded encoding-msg
)
506 (eq (coding-system-type coding
) t
))
507 (setq coding default-buffer-file-coding-system
))
508 (if (not (char-valid-p char
))
510 (format "(0%o, %d, 0x%x, invalid)" char char char
))
511 (setq encoded
(and (>= char
128) (encode-coding-char char coding
)))
514 (format "(0%o, %d, 0x%x, file %s)"
516 (if (> (length encoded
) 1)
518 (encoded-string-description encoded coding
)))
519 (format "(0%o, %d, 0x%x)" char char char
))))
521 ;; We show the detailed information about CHAR.
522 (describe-char-after (point)))
523 (if (or (/= beg
1) (/= end
(1+ total
)))
524 (message "Char: %s %s point=%d of %d (%d%%) <%d - %d> column %d %s"
526 (single-key-description char
)
527 (buffer-substring-no-properties (point) (1+ (point))))
528 encoding-msg pos total percent beg end col hscroll
)
529 (message "Char: %s %s point=%d of %d (%d%%) column %d %s"
531 (single-key-description char
)
532 (buffer-substring-no-properties (point) (1+ (point))))
533 encoding-msg pos total percent col hscroll
))))))
535 (defvar read-expression-map
536 (let ((m (make-sparse-keymap)))
537 (define-key m
"\M-\t" 'lisp-complete-symbol
)
538 (set-keymap-parent m minibuffer-local-map
)
540 "Minibuffer keymap used for reading Lisp expressions.")
542 (defvar read-expression-history nil
)
544 (defcustom eval-expression-print-level
4
545 "*Value to use for `print-level' when printing value in `eval-expression'."
550 (defcustom eval-expression-print-length
12
551 "*Value to use for `print-length' when printing value in `eval-expression'."
553 :type
'(choice (const nil
) integer
)
556 (defcustom eval-expression-debug-on-error t
557 "*Non-nil means set `debug-on-error' when evaluating in `eval-expression'.
558 If nil, don't change the value of `debug-on-error'."
563 ;; We define this, rather than making `eval' interactive,
564 ;; for the sake of completion of names like eval-region, eval-current-buffer.
565 (defun eval-expression (eval-expression-arg
566 &optional eval-expression-insert-value
)
567 "Evaluate EXPRESSION and print value in minibuffer.
568 Value is also consed on to front of the variable `values'."
570 (list (read-from-minibuffer "Eval: "
571 nil read-expression-map t
572 'read-expression-history
)
575 (if (null eval-expression-debug-on-error
)
576 (setq values
(cons (eval eval-expression-arg
) values
))
577 (let ((old-value (make-symbol "t")) new-value
)
578 ;; Bind debug-on-error to something unique so that we can
579 ;; detect when evaled code changes it.
580 (let ((debug-on-error old-value
))
581 (setq values
(cons (eval eval-expression-arg
) values
))
582 (setq new-value debug-on-error
))
583 ;; If evaled code has changed the value of debug-on-error,
584 ;; propagate that change to the global binding.
585 (unless (eq old-value new-value
)
586 (setq debug-on-error new-value
))))
588 (let ((print-length eval-expression-print-length
)
589 (print-level eval-expression-print-level
))
591 (if eval-expression-insert-value
(current-buffer) t
))))
593 (defun edit-and-eval-command (prompt command
)
594 "Prompting with PROMPT, let user edit COMMAND and eval result.
595 COMMAND is a Lisp expression. Let user edit that expression in
596 the minibuffer, then read and evaluate the result."
597 (let ((command (read-from-minibuffer prompt
598 (prin1-to-string command
)
599 read-expression-map t
600 '(command-history .
1))))
601 ;; If command was added to command-history as a string,
602 ;; get rid of that. We want only evaluable expressions there.
603 (if (stringp (car command-history
))
604 (setq command-history
(cdr command-history
)))
606 ;; If command to be redone does not match front of history,
607 ;; add it to the history.
608 (or (equal command
(car command-history
))
609 (setq command-history
(cons command command-history
)))
612 (defun repeat-complex-command (arg)
613 "Edit and re-evaluate last complex command, or ARGth from last.
614 A complex command is one which used the minibuffer.
615 The command is placed in the minibuffer as a Lisp form for editing.
616 The result is executed, repeating the command as changed.
617 If the command has been changed or is not the most recent previous command
618 it is added to the front of the command history.
619 You can use the minibuffer history commands \\<minibuffer-local-map>\\[next-history-element] and \\[previous-history-element]
620 to get different commands to edit and resubmit."
622 (let ((elt (nth (1- arg
) command-history
))
627 (let ((print-level nil
)
628 (minibuffer-history-position arg
)
629 (minibuffer-history-sexp-flag (1+ (minibuffer-depth))))
630 (read-from-minibuffer
631 "Redo: " (prin1-to-string elt
) read-expression-map t
632 (cons 'command-history arg
))))
634 ;; If command was added to command-history as a string,
635 ;; get rid of that. We want only evaluable expressions there.
636 (if (stringp (car command-history
))
637 (setq command-history
(cdr command-history
)))
639 ;; If command to be redone does not match front of history,
640 ;; add it to the history.
641 (or (equal newcmd
(car command-history
))
642 (setq command-history
(cons newcmd command-history
)))
646 (defvar minibuffer-history nil
647 "Default minibuffer history list.
648 This is used for all minibuffer input
649 except when an alternate history list is specified.")
650 (defvar minibuffer-history-sexp-flag nil
651 "Non-nil when doing history operations on `command-history'.
652 More generally, indicates that the history list being acted on
653 contains expressions rather than strings.
654 It is only valid if its value equals the current minibuffer depth,
655 to handle recursive uses of the minibuffer.")
656 (setq minibuffer-history-variable
'minibuffer-history
)
657 (setq minibuffer-history-position nil
)
658 (defvar minibuffer-history-search-history nil
)
661 (lambda (key-and-command)
663 (lambda (keymap-and-completionp)
664 ;; Arg is (KEYMAP-SYMBOL . COMPLETION-MAP-P).
665 ;; If the cdr of KEY-AND-COMMAND (the command) is a cons,
666 ;; its car is used if COMPLETION-MAP-P is nil, its cdr if it is t.
667 (define-key (symbol-value (car keymap-and-completionp
))
668 (car key-and-command
)
669 (let ((command (cdr key-and-command
)))
671 ;; (and ... nil) => ... turns back on the completion-oriented
672 ;; history commands which rms turned off since they seem to
673 ;; do things he doesn't like.
674 (if (and (cdr keymap-and-completionp
) nil
) ;XXX turned off
675 (progn (error "EMACS BUG!") (cdr command
))
678 '((minibuffer-local-map . nil
)
679 (minibuffer-local-ns-map . nil
)
680 (minibuffer-local-completion-map . t
)
681 (minibuffer-local-must-match-map . t
)
682 (read-expression-map . nil
))))
683 '(("\en" .
(next-history-element . next-complete-history-element
))
684 ([next] . (next-history-element . next-complete-history-element))
685 ("\ep" . (previous-history-element . previous-complete-history-element))
686 ([prior] . (previous-history-element . previous-complete-history-element))
687 ("\er" . previous-matching-history-element)
688 ("\es" . next-matching-history-element)))
690 (defvar minibuffer-text-before-history nil
691 "Text that was in this minibuffer before any history commands.
692 This is nil if there have not yet been any history commands
693 in this use of the minibuffer.")
695 (add-hook 'minibuffer-setup-hook 'minibuffer-history-initialize)
697 (defun minibuffer-history-initialize ()
698 (setq minibuffer-text-before-history nil))
700 (defun minibuffer-avoid-prompt (new old)
701 "A point-motion hook for the minibuffer, that moves point out of the prompt."
702 (constrain-to-field nil (point-max)))
704 (defcustom minibuffer-history-case-insensitive-variables nil
705 "*Minibuffer history variables for which matching should ignore case.
706 If a history variable is a member of this list, then the
707 \\[previous-matching-history-element] and \\[next-matching-history-element]\
708 commands ignore case when searching it, regardless of `case-fold-search'."
709 :type '(repeat variable)
712 (defun previous-matching-history-element (regexp n)
713 "Find the previous history element that matches REGEXP.
714 \(Previous history elements refer to earlier actions.)
715 With prefix argument N, search for Nth previous match.
716 If N is negative, find the next or Nth next match.
717 An uppercase letter in REGEXP makes the search case-sensitive.
718 See also `minibuffer-history-case-insensitive-variables'."
720 (let* ((enable-recursive-minibuffers t)
721 (regexp (read-from-minibuffer "Previous element matching (regexp): "
725 'minibuffer-history-search-history)))
726 ;; Use the last regexp specified, by default, if input is empty.
727 (list (if (string= regexp "")
728 (if minibuffer-history-search-history
729 (car minibuffer-history-search-history)
730 (error "No previous history search regexp"))
732 (prefix-numeric-value current-prefix-arg))))
734 (if (and (zerop minibuffer-history-position)
735 (null minibuffer-text-before-history))
736 (setq minibuffer-text-before-history (field-string (point-max))))
737 (let ((history (symbol-value minibuffer-history-variable))
739 (if (isearch-no-upper-case-p regexp t) ; assume isearch.el is dumped
740 ;; On some systems, ignore case for file names.
741 (if (memq minibuffer-history-variable
742 minibuffer-history-case-insensitive-variables)
744 ;; Respect the user's setting for case-fold-search:
750 (pos minibuffer-history-position))
753 (setq pos (min (max 1 (+ pos (if (< n 0) -1 1))) (length history)))
754 (when (= pos prevpos)
756 "No later matching history item"
757 "No earlier matching history item")))
759 (if (eq minibuffer-history-sexp-flag (minibuffer-depth))
760 (let ((print-level nil))
761 (prin1-to-string (nth (1- pos) history)))
762 (nth (1- pos) history)))
765 (and (string-match regexp match-string)
767 (and (string-match (concat ".*\\(" regexp "\\)") match-string)
768 (match-beginning 1))))
770 (setq n (+ n (if (< n 0) 1 -1)))))
771 (setq minibuffer-history-position pos)
772 (goto-char (point-max))
774 (insert match-string)
775 (goto-char (+ (field-beginning) match-offset))))
776 (if (or (eq (car (car command-history)) 'previous-matching-history-element)
777 (eq (car (car command-history)) 'next-matching-history-element))
778 (setq command-history (cdr command-history))))
780 (defun next-matching-history-element (regexp n)
781 "Find the next history element that matches REGEXP.
782 \(The next history element refers to a more recent action.)
783 With prefix argument N, search for Nth next match.
784 If N is negative, find the previous or Nth previous match.
785 An uppercase letter in REGEXP makes the search case-sensitive."
787 (let* ((enable-recursive-minibuffers t)
788 (regexp (read-from-minibuffer "Next element matching (regexp): "
792 'minibuffer-history-search-history)))
793 ;; Use the last regexp specified, by default, if input is empty.
794 (list (if (string= regexp "")
795 (setcar minibuffer-history-search-history
796 (nth 1 minibuffer-history-search-history))
798 (prefix-numeric-value current-prefix-arg))))
799 (previous-matching-history-element regexp (- n)))
801 (defvar minibuffer-temporary-goal-position nil)
803 (defun next-history-element (n)
804 "Insert the next element of the minibuffer history into the minibuffer."
807 (let ((narg (- minibuffer-history-position n))
808 (minimum (if minibuffer-default -1 0))
809 elt minibuffer-returned-to-present)
810 (if (and (zerop minibuffer-history-position)
811 (null minibuffer-text-before-history))
812 (setq minibuffer-text-before-history (field-string (point-max))))
814 (if minibuffer-default
815 (error "End of history; no next item")
816 (error "End of history; no default available")))
817 (if (> narg (length (symbol-value minibuffer-history-variable)))
818 (error "Beginning of history; no preceding item"))
819 (unless (or (eq last-command 'next-history-element)
820 (eq last-command 'previous-history-element))
821 (let ((prompt-end (field-beginning (point-max))))
822 (set (make-local-variable 'minibuffer-temporary-goal-position)
823 (cond ((<= (point) prompt-end) prompt-end)
826 (goto-char (point-max))
828 (setq minibuffer-history-position narg)
830 (setq elt minibuffer-default))
832 (setq elt (or minibuffer-text-before-history ""))
833 (setq minibuffer-returned-to-present t)
834 (setq minibuffer-text-before-history nil))
835 (t (setq elt (nth (1- minibuffer-history-position)
836 (symbol-value minibuffer-history-variable)))))
838 (if (and (eq minibuffer-history-sexp-flag (minibuffer-depth))
839 (not minibuffer-returned-to-present))
840 (let ((print-level nil))
841 (prin1-to-string elt))
843 (goto-char (or minibuffer-temporary-goal-position (point-max))))))
845 (defun previous-history-element (n)
846 "Inserts the previous element of the minibuffer history into the minibuffer."
848 (next-history-element (- n)))
850 (defun next-complete-history-element (n)
851 "Get next history element which completes the minibuffer before the point.
852 The contents of the minibuffer after the point are deleted, and replaced
853 by the new completion."
855 (let ((point-at-start (point)))
856 (next-matching-history-element
858 "^" (regexp-quote (buffer-substring (field-beginning) (point))))
860 ;; next-matching-history-element always puts us at (point-min).
861 ;; Move to the position we were at before changing the buffer contents.
862 ;; This is still sensical, because the text before point has not changed.
863 (goto-char point-at-start)))
865 (defun previous-complete-history-element (n)
867 Get previous history element which completes the minibuffer before the point.
868 The contents of the minibuffer after the point are deleted, and replaced
869 by the new completion."
871 (next-complete-history-element (- n)))
873 ;; These two functions are for compatibility with the old subrs of the
876 (defun minibuffer-prompt-width ()
877 "Return the display width of the minibuffer prompt.
878 Return 0 if current buffer is not a mini-buffer."
879 ;; Return the width of everything before the field at the end of
880 ;; the buffer; this should be 0 for normal buffers.
881 (1- (field-beginning (point-max))))
883 (defun minibuffer-prompt-end ()
884 "Return the buffer position of the end of the minibuffer prompt.
885 Return 0 if current buffer is not a mini-buffer."
886 (field-beginning (point-max)))
889 ;Put this on C-x u, so we can force that rather than C-_ into startup msg
890 (defalias 'advertised-undo 'undo)
892 (defun undo (&optional arg)
893 "Undo some previous changes.
894 Repeat this command to undo more changes.
895 A numeric argument serves as a repeat count.
897 In Transient Mark mode when the mark is active, only undo changes within
898 the current region. Similarly, when not in Transient Mark mode, just C-u
899 as an argument limits undo to changes within the current region."
901 ;; If we don't get all the way thru, make last-command indicate that
902 ;; for the following command.
903 (setq this-command t)
904 (let ((modified (buffer-modified-p))
905 (recent-save (recent-auto-save-p)))
906 (or (eq (selected-window) (minibuffer-window))
908 (unless (eq last-command 'undo)
909 (if (if transient-mark-mode mark-active (and arg (not (numberp arg))))
910 (undo-start (region-beginning) (region-end))
912 ;; get rid of initial undo boundary
915 (if (or transient-mark-mode (numberp arg))
916 (prefix-numeric-value arg)
918 ;; Don't specify a position in the undo record for the undo command.
919 ;; Instead, undoing this should move point to where the change is.
920 (let ((tail buffer-undo-list)
922 (while (and tail (not done) (not (null (car tail))))
923 (if (integerp (car tail))
926 (setq buffer-undo-list (delq (car tail) buffer-undo-list))))
927 (setq tail (cdr tail))))
928 (and modified (not (buffer-modified-p))
929 (delete-auto-save-file-if-necessary recent-save)))
930 ;; If we do get all the way thru, make this-command indicate that.
931 (setq this-command 'undo))
933 (defvar pending-undo-list nil
934 "Within a run of consecutive undo commands, list remaining to be undone.")
936 (defvar undo-in-progress nil
937 "Non-nil while performing an undo.
938 Some change-hooks test this variable to do something different.")
940 (defun undo-more (count)
941 "Undo back N undo-boundaries beyond what was already undone recently.
942 Call `undo-start' to get ready to undo recent changes,
943 then call `undo-more' one or more times to undo them."
944 (or pending-undo-list
945 (error "No further undo information"))
946 (let ((undo-in-progress t))
947 (setq pending-undo-list (primitive-undo count pending-undo-list))))
949 ;; Deep copy of a list
950 (defun undo-copy-list (list)
951 "Make a copy of undo list LIST."
952 (mapcar 'undo-copy-list-1 list))
954 (defun undo-copy-list-1 (elt)
956 (cons (car elt) (undo-copy-list-1 (cdr elt)))
959 (defun undo-start (&optional beg end)
960 "Set `pending-undo-list' to the front of the undo list.
961 The next call to `undo-more' will undo the most recently made change.
962 If BEG and END are specified, then only undo elements
963 that apply to text between BEG and END are used; other undo elements
964 are ignored. If BEG and END are nil, all undo elements are used."
965 (if (eq buffer-undo-list t)
966 (error "No undo information in this buffer"))
967 (setq pending-undo-list
968 (if (and beg end (not (= beg end)))
969 (undo-make-selective-list (min beg end) (max beg end))
972 (defvar undo-adjusted-markers)
974 (defun undo-make-selective-list (start end)
975 "Return a list of undo elements for the region START to END.
976 The elements come from `buffer-undo-list', but we keep only
977 the elements inside this region, and discard those outside this region.
978 If we find an element that crosses an edge of this region,
979 we stop and ignore all further elements."
980 (let ((undo-list-copy (undo-copy-list buffer-undo-list))
981 (undo-list (list nil))
982 undo-adjusted-markers
984 undo-elt undo-elt temp-undo-list delta)
985 (while undo-list-copy
986 (setq undo-elt (car undo-list-copy))
988 (cond ((and (consp undo-elt) (eq (car undo-elt) t))
989 ;; This is a "was unmodified" element.
990 ;; Keep it if we have kept everything thus far.
993 (undo-elt-in-region undo-elt start end)))))
996 (setq end (+ end (cdr (undo-delta undo-elt))))
997 ;; Don't put two nils together in the list
998 (if (not (and (eq (car undo-list) nil)
1000 (setq undo-list (cons undo-elt undo-list))))
1001 (if (undo-elt-crosses-region undo-elt start end)
1002 (setq undo-list-copy nil)
1003 (setq some-rejected t)
1004 (setq temp-undo-list (cdr undo-list-copy))
1005 (setq delta (undo-delta undo-elt))
1007 (when (/= (cdr delta) 0)
1008 (let ((position (car delta))
1009 (offset (cdr delta)))
1011 ;; Loop down the earlier events adjusting their buffer positions
1012 ;; to reflect the fact that a change to the buffer isn't being
1013 ;; undone. We only need to process those element types which
1014 ;; undo-elt-in-region will return as being in the region since
1015 ;; only those types can ever get into the output
1017 (while temp-undo-list
1018 (setq undo-elt (car temp-undo-list))
1019 (cond ((integerp undo-elt)
1020 (if (>= undo-elt position)
1021 (setcar temp-undo-list (- undo-elt offset))))
1022 ((atom undo-elt) nil)
1023 ((stringp (car undo-elt))
1024 ;; (TEXT . POSITION)
1025 (let ((text-pos (abs (cdr undo-elt)))
1026 (point-at-end (< (cdr undo-elt) 0 )))
1027 (if (>= text-pos position)
1028 (setcdr undo-elt (* (if point-at-end -1 1)
1029 (- text-pos offset))))))
1030 ((integerp (car undo-elt))
1032 (when (>= (car undo-elt) position)
1033 (setcar undo-elt (- (car undo-elt) offset))
1034 (setcdr undo-elt (- (cdr undo-elt) offset))))
1035 ((null (car undo-elt))
1036 ;; (nil PROPERTY VALUE BEG . END)
1037 (let ((tail (nthcdr 3 undo-elt)))
1038 (when (>= (car tail) position)
1039 (setcar tail (- (car tail) offset))
1040 (setcdr tail (- (cdr tail) offset))))))
1041 (setq temp-undo-list (cdr temp-undo-list))))))))
1042 (setq undo-list-copy (cdr undo-list-copy)))
1043 (nreverse undo-list)))
1045 (defun undo-elt-in-region (undo-elt start end)
1046 "Determine whether UNDO-ELT falls inside the region START ... END.
1047 If it crosses the edge, we return nil."
1048 (cond ((integerp undo-elt)
1049 (and (>= undo-elt start)
1055 ((stringp (car undo-elt))
1056 ;; (TEXT . POSITION)
1057 (and (>= (abs (cdr undo-elt)) start)
1058 (< (abs (cdr undo-elt)) end)))
1059 ((and (consp undo-elt) (markerp (car undo-elt)))
1060 ;; This is a marker-adjustment element (MARKER . ADJUSTMENT).
1061 ;; See if MARKER is inside the region.
1062 (let ((alist-elt (assq (car undo-elt) undo-adjusted-markers)))
1064 (setq alist-elt (cons (car undo-elt)
1065 (marker-position (car undo-elt))))
1066 (setq undo-adjusted-markers
1067 (cons alist-elt undo-adjusted-markers)))
1068 (and (cdr alist-elt)
1069 (>= (cdr alist-elt) start)
1070 (< (cdr alist-elt) end))))
1071 ((null (car undo-elt))
1072 ;; (nil PROPERTY VALUE BEG . END)
1073 (let ((tail (nthcdr 3 undo-elt)))
1074 (and (>= (car tail) start)
1075 (< (cdr tail) end))))
1076 ((integerp (car undo-elt))
1078 (and (>= (car undo-elt) start)
1079 (< (cdr undo-elt) end)))))
1081 (defun undo-elt-crosses-region (undo-elt start end)
1082 "Test whether UNDO-ELT crosses one edge of that region START ... END.
1083 This assumes we have already decided that UNDO-ELT
1084 is not *inside* the region START...END."
1085 (cond ((atom undo-elt) nil)
1086 ((null (car undo-elt))
1087 ;; (nil PROPERTY VALUE BEG . END)
1088 (let ((tail (nthcdr 3 undo-elt)))
1089 (not (or (< (car tail) end)
1090 (> (cdr tail) start)))))
1091 ((integerp (car undo-elt))
1093 (not (or (< (car undo-elt) end)
1094 (> (cdr undo-elt) start))))))
1096 ;; Return the first affected buffer position and the delta for an undo element
1097 ;; delta is defined as the change in subsequent buffer positions if we *did*
1099 (defun undo-delta (undo-elt)
1100 (if (consp undo-elt)
1101 (cond ((stringp (car undo-elt))
1102 ;; (TEXT . POSITION)
1103 (cons (abs (cdr undo-elt)) (length (car undo-elt))))
1104 ((integerp (car undo-elt))
1106 (cons (car undo-elt) (- (car undo-elt) (cdr undo-elt))))
1111 (defvar shell-command-history nil
1112 "History list for some commands that read shell commands.")
1114 (defvar shell-command-switch "-c"
1115 "Switch used to have the shell execute its command line argument.")
1117 (defvar shell-command-default-error-buffer nil
1118 "*Buffer name for `shell-command' and `shell-command-on-region' error output.
1119 This buffer is used when `shell-command' or 'shell-command-on-region'
1120 is run interactively. A value of nil means that output to stderr and
1121 stdout will be intermixed in the output stream.")
1123 (defun shell-command (command &optional output-buffer error-buffer)
1124 "Execute string COMMAND in inferior shell; display output, if any.
1125 With prefix argument, insert the COMMAND's output at point.
1127 If COMMAND ends in ampersand, execute it asynchronously.
1128 The output appears in the buffer `*Async Shell Command*'.
1129 That buffer is in shell mode.
1131 Otherwise, COMMAND is executed synchronously. The output appears in
1132 the buffer `*Shell Command Output*'. If the output is short enough to
1133 display in the echo area (which is determined by the variables
1134 `resize-mini-windows' and `max-mini-window-height'), it is shown
1135 there, but it is nonetheless available in buffer `*Shell Command
1136 Output*' even though that buffer is not automatically displayed. If
1137 there is no output, or if output is inserted in the current buffer,
1138 then `*Shell Command Output*' is deleted.
1140 To specify a coding system for converting non-ASCII characters
1141 in the shell command output, use \\[universal-coding-system-argument]
1142 before this command.
1144 Noninteractive callers can specify coding systems by binding
1145 `coding-system-for-read' and `coding-system-for-write'.
1147 The optional second argument OUTPUT-BUFFER, if non-nil,
1148 says to put the output in some other buffer.
1149 If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
1150 If OUTPUT-BUFFER is not a buffer and not nil,
1151 insert output in current buffer. (This cannot be done asynchronously.)
1152 In either case, the output is inserted after point (leaving mark after it).
1154 If the optional third argument ERROR-BUFFER is non-nil, it is a buffer
1155 or buffer name to which to direct the command's standard error output.
1156 If it is nil, error output is mingled with regular output.
1157 In an interactive call, the variable `shell-command-default-error-buffer'
1158 specifies the value of ERROR-BUFFER."
1160 (interactive (list (read-from-minibuffer "Shell command: "
1161 nil nil nil 'shell-command-history)
1163 shell-command-default-error-buffer))
1164 ;; Look for a handler in case default-directory is a remote file name.
1166 (find-file-name-handler (directory-file-name default-directory)
1169 (funcall handler 'shell-command command output-buffer error-buffer)
1170 (if (and output-buffer
1171 (not (or (bufferp output-buffer) (stringp output-buffer))))
1175 (expand-file-name "scor"
1176 (or small-temporary-file-directory
1177 temporary-file-directory)))
1179 (barf-if-buffer-read-only)
1181 ;; We do not use -f for csh; we will not support broken use of
1182 ;; .cshrcs. Even the BSD csh manual says to use
1183 ;; "if ($?prompt) exit" before things which are not useful
1184 ;; non-interactively. Besides, if someone wants their other
1185 ;; aliases for shell commands then they can still have them.
1186 (call-process shell-file-name nil
1190 nil shell-command-switch command)
1191 (when (and error-file (file-exists-p error-file))
1192 (if (< 0 (nth 7 (file-attributes error-file)))
1193 (with-current-buffer (get-buffer-create error-buffer)
1194 (let ((pos-from-end (- (point-max) (point))))
1197 ;; Do no formatting while reading error file,
1198 ;; because that can run a shell command, and we
1199 ;; don't want that to cause an infinite recursion.
1200 (format-insert-file error-file nil)
1201 ;; Put point after the inserted errors.
1202 (goto-char (- (point-max) pos-from-end)))
1203 (display-buffer (current-buffer))))
1204 (delete-file error-file))
1205 ;; This is like exchange-point-and-mark, but doesn't
1206 ;; activate the mark. It is cleaner to avoid activation,
1207 ;; even though the command loop would deactivate the mark
1208 ;; because we inserted text.
1209 (goto-char (prog1 (mark t)
1210 (set-marker (mark-marker) (point)
1211 (current-buffer)))))
1212 ;; Preserve the match data in case called from a program.
1214 (if (string-match "[ \t]*&[ \t]*$" command)
1215 ;; Command ending with ampersand means asynchronous.
1216 (let ((buffer (get-buffer-create
1217 (or output-buffer "*Async Shell Command*")))
1218 (directory default-directory)
1220 ;; Remove the ampersand.
1221 (setq command (substring command 0 (match-beginning 0)))
1222 ;; If will kill a process, query first.
1223 (setq proc (get-buffer-process buffer))
1225 (if (yes-or-no-p "A command is running. Kill it? ")
1227 (error "Shell command in progress")))
1230 (setq buffer-read-only nil)
1232 (display-buffer buffer)
1233 (setq default-directory directory)
1234 (setq proc (start-process "Shell" buffer shell-file-name
1235 shell-command-switch command))
1236 (setq mode-line-process '(":%s"))
1237 (require 'shell) (shell-mode)
1238 (set-process-sentinel proc 'shell-command-sentinel)
1240 (shell-command-on-region (point) (point) command
1241 output-buffer nil error-buffer)))))))
1243 (defun display-message-or-buffer (message
1244 &optional buffer-name not-this-window frame)
1245 "Display MESSAGE in the echo area if possible, otherwise in a pop-up buffer.
1246 MESSAGE may be either a string or a buffer.
1248 A buffer is displayed using `display-buffer' if MESSAGE is too long for
1249 the maximum height of the echo area, as defined by `max-mini-window-height'
1250 if `resize-mini-windows' is non-nil.
1252 Returns either the string shown in the echo area, or when a pop-up
1253 buffer is used, the window used to display it.
1255 If MESSAGE is a string, then the optional argument BUFFER-NAME is the
1256 name of the buffer used to display it in the case where a pop-up buffer
1257 is used, defaulting to `*Message*'. In the case where MESSAGE is a
1258 string and it is displayed in the echo area, it is not specified whether
1259 the contents are inserted into the buffer anyway.
1261 Optional arguments NOT-THIS-WINDOW and FRAME are as for `display-buffer',
1262 and only used if a buffer is displayed."
1263 (cond ((and (stringp message) (not (string-match "\n" message)))
1264 ;; Trivial case where we can use the echo area
1265 (message "%s" message))
1266 ((and (stringp message)
1267 (= (string-match "\n" message) (1- (length message))))
1268 ;; Trivial case where we can just remove single trailing newline
1269 (message "%s" (substring message 0 (1- (length message)))))
1272 (with-current-buffer
1273 (if (bufferp message)
1275 (get-buffer-create (or buffer-name "*Message*")))
1277 (unless (bufferp message)
1282 (if (= (buffer-size) 0)
1284 (count-lines (point-min) (point-max)))))
1285 (cond ((or (<= lines 1)
1287 (if resize-mini-windows
1288 (cond ((floatp max-mini-window-height)
1290 max-mini-window-height))
1291 ((integerp max-mini-window-height)
1292 max-mini-window-height)
1297 (goto-char (point-max))
1300 (message "%s" (buffer-substring (point-min) (point))))
1303 (goto-char (point-min))
1304 (display-buffer message not-this-window frame))))))))
1307 ;; We have a sentinel to prevent insertion of a termination message
1308 ;; in the buffer itself.
1309 (defun shell-command-sentinel (process signal)
1310 (if (memq (process-status process) '(exit signal))
1312 (car (cdr (cdr (process-command process))))
1313 (substring signal 0 -1))))
1315 (defun shell-command-on-region (start end command
1316 &optional output-buffer replace
1318 "Execute string COMMAND in inferior shell with region as input.
1319 Normally display output (if any) in temp buffer `*Shell Command Output*';
1320 Prefix arg means replace the region with it. Return the exit code of
1323 To specify a coding system for converting non-ASCII characters
1324 in the input and output to the shell command, use \\[universal-coding-system-argument]
1325 before this command. By default, the input (from the current buffer)
1326 is encoded in the same coding system that will be used to save the file,
1327 `buffer-file-coding-system'. If the output is going to replace the region,
1328 then it is decoded from that same coding system.
1330 The noninteractive arguments are START, END, COMMAND, OUTPUT-BUFFER,
1331 REPLACE, ERROR-BUFFER. Noninteractive callers can specify coding
1332 systems by binding `coding-system-for-read' and
1333 `coding-system-for-write'.
1335 If the output is short enough to display in the echo area (which is
1336 determined by the variable `max-mini-window-height' if
1337 `resize-mini-windows' is non-nil), it is shown there, but it is
1338 nonetheless available in buffer `*Shell Command Output*' even though
1339 that buffer is not automatically displayed. If there is no output, or
1340 if output is inserted in the current buffer, then `*Shell Command
1341 Output*' is deleted.
1343 If the optional fourth argument OUTPUT-BUFFER is non-nil,
1344 that says to put the output in some other buffer.
1345 If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
1346 If OUTPUT-BUFFER is not a buffer and not nil,
1347 insert output in the current buffer.
1348 In either case, the output is inserted after point (leaving mark after it).
1350 If REPLACE, the optional fifth argument, is non-nil, that means insert
1351 the output in place of text from START to END, putting point and mark
1354 If optional sixth argument ERROR-BUFFER is non-nil, it is a buffer
1355 or buffer name to which to direct the command's standard error output.
1356 If it is nil, error output is mingled with regular output.
1357 In an interactive call, the variable `shell-command-default-error-buffer'
1358 specifies the value of ERROR-BUFFER."
1359 (interactive (let ((string
1360 ;; Do this before calling region-beginning
1361 ;; and region-end, in case subprocess output
1362 ;; relocates them while we are in the minibuffer.
1363 (read-from-minibuffer "Shell command on region: "
1365 'shell-command-history)))
1366 ;; call-interactively recognizes region-beginning and
1367 ;; region-end specially, leaving them in the history.
1368 (list (region-beginning) (region-end)
1372 shell-command-default-error-buffer)))
1376 (expand-file-name "scor"
1377 (or small-temporary-file-directory
1378 temporary-file-directory)))
1383 (not (or (bufferp output-buffer) (stringp output-buffer)))))
1384 ;; Replace specified region with output from command.
1385 (let ((swap (and replace (< start end))))
1386 ;; Don't muck with mark unless REPLACE says we should.
1388 (and replace (push-mark))
1390 (call-process-region start end shell-file-name t
1394 nil shell-command-switch command))
1395 (let ((shell-buffer (get-buffer "*Shell Command Output*")))
1396 (and shell-buffer (not (eq shell-buffer (current-buffer)))
1397 (kill-buffer shell-buffer)))
1398 ;; Don't muck with mark unless REPLACE says we should.
1399 (and replace swap (exchange-point-and-mark)))
1400 ;; No prefix argument: put the output in a temp buffer,
1401 ;; replacing its entire contents.
1402 (let ((buffer (get-buffer-create
1403 (or output-buffer "*Shell Command Output*")))
1406 (if (eq buffer (current-buffer))
1407 ;; If the input is the same buffer as the output,
1408 ;; delete everything but the specified region,
1409 ;; then replace that region with the output.
1410 (progn (setq buffer-read-only nil)
1411 (delete-region (max start end) (point-max))
1412 (delete-region (point-min) (min start end))
1414 (call-process-region (point-min) (point-max)
1419 nil shell-command-switch
1421 ;; Clear the output buffer, then run the command with
1423 (let ((directory default-directory))
1426 (setq buffer-read-only nil)
1427 (if (not output-buffer)
1428 (setq default-directory directory))
1431 (call-process-region start end shell-file-name nil
1433 (list buffer error-file)
1435 nil shell-command-switch command)))
1436 (setq success (and exit-status (equal 0 exit-status)))
1437 ;; Report the amount of output.
1438 (if (with-current-buffer buffer (> (point-max) (point-min)))
1439 ;; There's some output, display it
1440 (display-message-or-buffer buffer)
1441 ;; No output; error?
1442 (message (if (and error-file
1443 (< 0 (nth 7 (file-attributes error-file))))
1444 "(Shell command %sed with some error output)"
1445 "(Shell command %sed with no output)")
1446 (if (equal 0 exit-status) "succeed" "fail"))
1447 (kill-buffer buffer)))))
1449 (when (and error-file (file-exists-p error-file))
1450 (if (< 0 (nth 7 (file-attributes error-file)))
1451 (with-current-buffer (get-buffer-create error-buffer)
1452 (let ((pos-from-end (- (point-max) (point))))
1455 ;; Do no formatting while reading error file,
1456 ;; because that can run a shell command, and we
1457 ;; don't want that to cause an infinite recursion.
1458 (format-insert-file error-file nil)
1459 ;; Put point after the inserted errors.
1460 (goto-char (- (point-max) pos-from-end)))
1461 (display-buffer (current-buffer))))
1462 (delete-file error-file))
1465 (defun shell-command-to-string (command)
1466 "Execute shell command COMMAND and return its output as a string."
1467 (with-output-to-string
1468 (with-current-buffer
1470 (call-process shell-file-name nil t nil shell-command-switch command))))
1472 (defvar universal-argument-map
1473 (let ((map (make-sparse-keymap)))
1474 (define-key map [t] 'universal-argument-other-key)
1475 (define-key map (vector meta-prefix-char t) 'universal-argument-other-key)
1476 (define-key map [switch-frame] nil)
1477 (define-key map [?\C-u] 'universal-argument-more)
1478 (define-key map [?-] 'universal-argument-minus)
1479 (define-key map [?0] 'digit-argument)
1480 (define-key map [?1] 'digit-argument)
1481 (define-key map [?2] 'digit-argument)
1482 (define-key map [?3] 'digit-argument)
1483 (define-key map [?4] 'digit-argument)
1484 (define-key map [?5] 'digit-argument)
1485 (define-key map [?6] 'digit-argument)
1486 (define-key map [?7] 'digit-argument)
1487 (define-key map [?8] 'digit-argument)
1488 (define-key map [?9] 'digit-argument)
1489 (define-key map [kp-0] 'digit-argument)
1490 (define-key map [kp-1] 'digit-argument)
1491 (define-key map [kp-2] 'digit-argument)
1492 (define-key map [kp-3] 'digit-argument)
1493 (define-key map [kp-4] 'digit-argument)
1494 (define-key map [kp-5] 'digit-argument)
1495 (define-key map [kp-6] 'digit-argument)
1496 (define-key map [kp-7] 'digit-argument)
1497 (define-key map [kp-8] 'digit-argument)
1498 (define-key map [kp-9] 'digit-argument)
1499 (define-key map [kp-subtract] 'universal-argument-minus)
1501 "Keymap used while processing \\[universal-argument].")
1503 (defvar universal-argument-num-events nil
1504 "Number of argument-specifying events read by `universal-argument'.
1505 `universal-argument-other-key' uses this to discard those events
1506 from (this-command-keys), and reread only the final command.")
1508 (defun universal-argument ()
1509 "Begin a numeric argument for the following command.
1510 Digits or minus sign following \\[universal-argument] make up the numeric argument.
1511 \\[universal-argument] following the digits or minus sign ends the argument.
1512 \\[universal-argument] without digits or minus sign provides 4 as argument.
1513 Repeating \\[universal-argument] without digits or minus sign
1514 multiplies the argument by 4 each time.
1515 For some commands, just \\[universal-argument] by itself serves as a flag
1516 which is different in effect from any particular numeric argument.
1517 These commands include \\[set-mark-command] and \\[start-kbd-macro]."
1519 (setq prefix-arg (list 4))
1520 (setq universal-argument-num-events (length (this-command-keys)))
1521 (setq overriding-terminal-local-map universal-argument-map))
1523 ;; A subsequent C-u means to multiply the factor by 4 if we've typed
1524 ;; nothing but C-u's; otherwise it means to terminate the prefix arg.
1525 (defun universal-argument-more (arg)
1528 (setq prefix-arg (list (* 4 (car arg))))
1530 (setq prefix-arg (list -4))
1531 (setq prefix-arg arg)
1532 (setq overriding-terminal-local-map nil)))
1533 (setq universal-argument-num-events (length (this-command-keys))))
1535 (defun negative-argument (arg)
1536 "Begin a negative numeric argument for the next command.
1537 \\[universal-argument] following digits or minus sign ends the argument."
1539 (cond ((integerp arg)
1540 (setq prefix-arg (- arg)))
1542 (setq prefix-arg nil))
1544 (setq prefix-arg '-)))
1545 (setq universal-argument-num-events (length (this-command-keys)))
1546 (setq overriding-terminal-local-map universal-argument-map))
1548 (defun digit-argument (arg)
1549 "Part of the numeric argument for the next command.
1550 \\[universal-argument] following digits or minus sign ends the argument."
1552 (let* ((char (if (integerp last-command-char)
1554 (get last-command-char 'ascii-character)))
1555 (digit (- (logand char ?\177) ?0)))
1556 (cond ((integerp arg)
1557 (setq prefix-arg (+ (* arg 10)
1558 (if (< arg 0) (- digit) digit))))
1560 ;; Treat -0 as just -, so that -01 will work.
1561 (setq prefix-arg (if (zerop digit) '- (- digit))))
1563 (setq prefix-arg digit))))
1564 (setq universal-argument-num-events (length (this-command-keys)))
1565 (setq overriding-terminal-local-map universal-argument-map))
1567 ;; For backward compatibility, minus with no modifiers is an ordinary
1568 ;; command if digits have already been entered.
1569 (defun universal-argument-minus (arg)
1572 (universal-argument-other-key arg)
1573 (negative-argument arg)))
1575 ;; Anything else terminates the argument and is left in the queue to be
1576 ;; executed as a command.
1577 (defun universal-argument-other-key (arg)
1579 (setq prefix-arg arg)
1580 (let* ((key (this-command-keys))
1581 (keylist (listify-key-sequence key)))
1582 (setq unread-command-events
1583 (append (nthcdr universal-argument-num-events keylist)
1584 unread-command-events)))
1585 (reset-this-command-lengths)
1586 (setq overriding-terminal-local-map nil))
1588 ;;;; Window system cut and paste hooks.
1590 (defvar interprogram-cut-function nil
1591 "Function to call to make a killed region available to other programs.
1593 Most window systems provide some sort of facility for cutting and
1594 pasting text between the windows of different programs.
1595 This variable holds a function that Emacs calls whenever text
1596 is put in the kill ring, to make the new kill available to other
1599 The function takes one or two arguments.
1600 The first argument, TEXT, is a string containing
1601 the text which should be made available.
1602 The second, PUSH, if non-nil means this is a \"new\" kill;
1603 nil means appending to an \"old\" kill.")
1605 (defvar interprogram-paste-function nil
1606 "Function to call to get text cut from other programs.
1608 Most window systems provide some sort of facility for cutting and
1609 pasting text between the windows of different programs.
1610 This variable holds a function that Emacs calls to obtain
1611 text that other programs have provided for pasting.
1613 The function should be called with no arguments. If the function
1614 returns nil, then no other program has provided such text, and the top
1615 of the Emacs kill ring should be used. If the function returns a
1616 string, that string should be put in the kill ring as the latest kill.
1618 Note that the function should return a string only if a program other
1619 than Emacs has provided a string for pasting; if Emacs provided the
1620 most recent string, the function should return nil. If it is
1621 difficult to tell whether Emacs or some other program provided the
1622 current string, it is probably good enough to return nil if the string
1623 is equal (according to `string=') to the last text Emacs provided.")
1627 ;;;; The kill ring data structure.
1629 (defvar kill-ring nil
1630 "List of killed text sequences.
1631 Since the kill ring is supposed to interact nicely with cut-and-paste
1632 facilities offered by window systems, use of this variable should
1633 interact nicely with `interprogram-cut-function' and
1634 `interprogram-paste-function'. The functions `kill-new',
1635 `kill-append', and `current-kill' are supposed to implement this
1636 interaction; you may want to use them instead of manipulating the kill
1639 (defcustom kill-ring-max 60
1640 "*Maximum length of kill ring before oldest elements are thrown away."
1644 (defvar kill-ring-yank-pointer nil
1645 "The tail of the kill ring whose car is the last thing yanked.")
1647 (defun kill-new (string &optional replace)
1648 "Make STRING the latest kill in the kill ring.
1649 Set the kill-ring-yank pointer to point to it.
1650 If `interprogram-cut-function' is non-nil, apply it to STRING.
1651 Optional second argument REPLACE non-nil means that STRING will replace
1652 the front of the kill ring, rather than being added to the list."
1653 (and (fboundp 'menu-bar-update-yank-menu)
1654 (menu-bar-update-yank-menu string (and replace (car kill-ring))))
1656 (setcar kill-ring string)
1657 (setq kill-ring (cons string kill-ring))
1658 (if (> (length kill-ring) kill-ring-max)
1659 (setcdr (nthcdr (1- kill-ring-max) kill-ring) nil)))
1660 (setq kill-ring-yank-pointer kill-ring)
1661 (if interprogram-cut-function
1662 (funcall interprogram-cut-function string (not replace))))
1664 (defun kill-append (string before-p)
1665 "Append STRING to the end of the latest kill in the kill ring.
1666 If BEFORE-P is non-nil, prepend STRING to the kill.
1667 If `interprogram-cut-function' is set, pass the resulting kill to
1669 (kill-new (if before-p
1670 (concat string (car kill-ring))
1671 (concat (car kill-ring) string)) t))
1673 (defun current-kill (n &optional do-not-move)
1674 "Rotate the yanking point by N places, and then return that kill.
1675 If N is zero, `interprogram-paste-function' is set, and calling it
1676 returns a string, then that string is added to the front of the
1677 kill ring and returned as the latest kill.
1678 If optional arg DO-NOT-MOVE is non-nil, then don't actually move the
1679 yanking point; just return the Nth kill forward."
1680 (let ((interprogram-paste (and (= n 0)
1681 interprogram-paste-function
1682 (funcall interprogram-paste-function))))
1683 (if interprogram-paste
1685 ;; Disable the interprogram cut function when we add the new
1686 ;; text to the kill ring, so Emacs doesn't try to own the
1687 ;; selection, with identical text.
1688 (let ((interprogram-cut-function nil))
1689 (kill-new interprogram-paste))
1691 (or kill-ring (error "Kill ring is empty"))
1692 (let ((ARGth-kill-element
1693 (nthcdr (mod (- n (length kill-ring-yank-pointer))
1697 (setq kill-ring-yank-pointer ARGth-kill-element))
1698 (car ARGth-kill-element)))))
1702 ;;;; Commands for manipulating the kill ring.
1704 (defcustom kill-read-only-ok nil
1705 "*Non-nil means don't signal an error for killing read-only text."
1709 (put 'text-read-only 'error-conditions
1710 '(text-read-only buffer-read-only error))
1711 (put 'text-read-only 'error-message "Text is read-only")
1713 (defun kill-region (beg end)
1714 "Kill between point and mark.
1715 The text is deleted but saved in the kill ring.
1716 The command \\[yank] can retrieve it from there.
1717 \(If you want to kill and then yank immediately, use \\[copy-region-as-kill].)
1718 If the buffer is read-only, Emacs will beep and refrain from deleting
1719 the text, but put the text in the kill ring anyway. This means that
1720 you can use the killing commands to copy text from a read-only buffer.
1722 This is the primitive for programs to kill text (as opposed to deleting it).
1723 Supply two arguments, character numbers indicating the stretch of text
1725 Any command that calls this function is a \"kill command\".
1726 If the previous command was also a kill command,
1727 the text killed this time appends to the text killed last time
1728 to make one entry in the kill ring."
1731 (let ((string (delete-and-extract-region beg end)))
1732 (when string ;STRING is nil if BEG = END
1733 ;; Add that string to the kill ring, one way or another.
1734 (if (eq last-command 'kill-region)
1735 (kill-append string (< end beg))
1737 (setq this-command 'kill-region))
1738 ((buffer-read-only text-read-only)
1739 ;; The code above failed because the buffer, or some of the characters
1740 ;; in the region, are read-only.
1741 ;; We should beep, in case the user just isn't aware of this.
1742 ;; However, there's no harm in putting
1743 ;; the region's text in the kill ring, anyway.
1744 (copy-region-as-kill beg end)
1745 ;; Set this-command now, so it will be set even if we get an error.
1746 (setq this-command 'kill-region)
1747 ;; This should barf, if appropriate, and give us the correct error.
1748 (if kill-read-only-ok
1749 (message "Read only text copied to kill ring")
1750 ;; Signal an error if the buffer is read-only.
1751 (barf-if-buffer-read-only)
1752 ;; If the buffer isn't read-only, the text is.
1753 (signal 'text-read-only (list (current-buffer)))))))
1755 ;; copy-region-as-kill no longer sets this-command, because it's confusing
1756 ;; to get two copies of the text when the user accidentally types M-w and
1757 ;; then corrects it with the intended C-w.
1758 (defun copy-region-as-kill (beg end)
1759 "Save the region as if killed, but don't kill it.
1760 In Transient Mark mode, deactivate the mark.
1761 If `interprogram-cut-function' is non-nil, also save the text for a window
1762 system cut and paste."
1764 (if (eq last-command 'kill-region)
1765 (kill-append (buffer-substring beg end) (< end beg))
1766 (kill-new (buffer-substring beg end)))
1767 (if transient-mark-mode
1768 (setq deactivate-mark t))
1771 (defun kill-ring-save (beg end)
1772 "Save the region as if killed, but don't kill it.
1773 In Transient Mark mode, deactivate the mark.
1774 If `interprogram-cut-function' is non-nil, also save the text for a window
1775 system cut and paste.
1777 This command is similar to `copy-region-as-kill', except that it gives
1778 visual feedback indicating the extent of the region being copied."
1780 (copy-region-as-kill beg end)
1782 (let ((other-end (if (= (point) beg) end beg))
1784 ;; Inhibit quitting so we can make a quit here
1785 ;; look like a C-g typed as a command.
1787 (if (pos-visible-in-window-p other-end (selected-window))
1789 ;; Swap point and mark.
1790 (set-marker (mark-marker) (point) (current-buffer))
1791 (goto-char other-end)
1794 (set-marker (mark-marker) other-end (current-buffer))
1796 ;; If user quit, deactivate the mark
1797 ;; as C-g would as a command.
1798 (and quit-flag mark-active
1800 (let* ((killed-text (current-kill 0))
1801 (message-len (min (length killed-text) 40)))
1803 ;; Don't say "killed"; that is misleading.
1804 (message "Saved text until \"%s\""
1805 (substring killed-text (- message-len)))
1806 (message "Saved text from \"%s\""
1807 (substring killed-text 0 message-len))))))))
1809 (defun append-next-kill (&optional interactive)
1810 "Cause following command, if it kills, to append to previous kill.
1811 The argument is used for internal purposes; do not supply one."
1813 ;; We don't use (interactive-p), since that breaks kbd macros.
1816 (setq this-command 'kill-region)
1817 (message "If the next command is a kill, it will append"))
1818 (setq last-command 'kill-region)))
1822 (defun yank-pop (arg)
1823 "Replace just-yanked stretch of killed text with a different stretch.
1824 This command is allowed only immediately after a `yank' or a `yank-pop'.
1825 At such a time, the region contains a stretch of reinserted
1826 previously-killed text. `yank-pop' deletes that text and inserts in its
1827 place a different stretch of killed text.
1829 With no argument, the previous kill is inserted.
1830 With argument N, insert the Nth previous kill.
1831 If N is negative, this is a more recent kill.
1833 The sequence of kills wraps around, so that after the oldest one
1834 comes the newest one."
1836 (if (not (eq last-command 'yank))
1837 (error "Previous command was not a yank"))
1838 (setq this-command 'yank)
1839 (let ((inhibit-read-only t)
1840 (before (< (point) (mark t))))
1841 (delete-region (point) (mark t))
1842 (set-marker (mark-marker) (point) (current-buffer))
1843 (let ((opoint (point)))
1844 (insert (current-kill arg))
1845 (let ((inhibit-read-only t))
1846 (remove-text-properties opoint (point) '(read-only nil))))
1848 ;; This is like exchange-point-and-mark, but doesn't activate the mark.
1849 ;; It is cleaner to avoid activation, even though the command
1850 ;; loop would deactivate the mark because we inserted text.
1851 (goto-char (prog1 (mark t)
1852 (set-marker (mark-marker) (point) (current-buffer))))))
1855 (defun yank (&optional arg)
1856 "Reinsert the last stretch of killed text.
1857 More precisely, reinsert the stretch of killed text most recently
1858 killed OR yanked. Put point at end, and set mark at beginning.
1859 With just C-u as argument, same but put point at beginning (and mark at end).
1860 With argument N, reinsert the Nth most recently killed stretch of killed
1862 See also the command \\[yank-pop]."
1864 ;; If we don't get all the way thru, make last-command indicate that
1865 ;; for the following command.
1866 (setq this-command t)
1868 (let ((opoint (point)))
1869 (insert (current-kill (cond
1873 (let ((inhibit-read-only t))
1874 (remove-text-properties opoint (point) '(read-only nil))))
1876 ;; This is like exchange-point-and-mark, but doesn't activate the mark.
1877 ;; It is cleaner to avoid activation, even though the command
1878 ;; loop would deactivate the mark because we inserted text.
1879 (goto-char (prog1 (mark t)
1880 (set-marker (mark-marker) (point) (current-buffer)))))
1881 ;; If we do get all the way thru, make this-command indicate that.
1882 (setq this-command 'yank)
1885 (defun rotate-yank-pointer (arg)
1886 "Rotate the yanking point in the kill ring.
1887 With argument, rotate that many kills forward (or backward, if negative)."
1891 ;; Some kill commands.
1893 ;; Internal subroutine of delete-char
1894 (defun kill-forward-chars (arg)
1895 (if (listp arg) (setq arg (car arg)))
1896 (if (eq arg '-) (setq arg -1))
1897 (kill-region (point) (forward-point arg)))
1899 ;; Internal subroutine of backward-delete-char
1900 (defun kill-backward-chars (arg)
1901 (if (listp arg) (setq arg (car arg)))
1902 (if (eq arg '-) (setq arg -1))
1903 (kill-region (point) (forward-point (- arg))))
1905 (defcustom backward-delete-char-untabify-method 'untabify
1906 "*The method for untabifying when deleting backward.
1907 Can be `untabify' -- turn a tab to many spaces, then delete one space;
1908 `hungry' -- delete all whitespace, both tabs and spaces;
1909 `all' -- delete all whitespace, including tabs, spaces and newlines;
1910 nil -- just delete one character."
1911 :type '(choice (const untabify) (const hungry) (const all) (const nil))
1914 (defun backward-delete-char-untabify (arg &optional killp)
1915 "Delete characters backward, changing tabs into spaces.
1916 The exact behavior depends on `backward-delete-char-untabify-method'.
1917 Delete ARG chars, and kill (save in kill ring) if KILLP is non-nil.
1918 Interactively, ARG is the prefix arg (default 1)
1919 and KILLP is t if a prefix arg was specified."
1920 (interactive "*p\nP")
1921 (when (eq backward-delete-char-untabify-method 'untabify)
1924 (while (and (> count 0) (not (bobp)))
1925 (if (= (preceding-char) ?\t)
1926 (let ((col (current-column)))
1928 (setq col (- col (current-column)))
1929 (insert-char ?\ col)
1932 (setq count (1- count))))))
1933 (delete-backward-char
1934 (let ((skip (cond ((eq backward-delete-char-untabify-method 'hungry) " \t")
1935 ((eq backward-delete-char-untabify-method 'all)
1938 (let ((wh (- (point) (save-excursion (skip-chars-backward skip)
1940 (+ arg (if (zerop wh) 0 (1- wh))))
1944 (defun zap-to-char (arg char)
1945 "Kill up to and including ARG'th occurrence of CHAR.
1946 Case is ignored if `case-fold-search' is non-nil in the current buffer.
1947 Goes backward if ARG is negative; error if CHAR not found."
1948 (interactive "p\ncZap to char: ")
1949 (kill-region (point) (progn
1950 (search-forward (char-to-string char) nil nil arg)
1951 ; (goto-char (if (> arg 0) (1- (point)) (1+ (point))))
1954 ;; kill-line and its subroutines.
1956 (defcustom kill-whole-line nil
1957 "*If non-nil, `kill-line' with no arg at beg of line kills the whole line."
1961 (defun kill-line (&optional arg)
1962 "Kill the rest of the current line; if no nonblanks there, kill thru newline.
1963 With prefix argument, kill that many lines from point.
1964 Negative arguments kill lines backward.
1965 With zero argument, kills the text before point on the current line.
1967 When calling from a program, nil means \"no arg\",
1968 a number counts as a prefix arg.
1970 To kill a whole line, when point is not at the beginning, type \
1971 \\[beginning-of-line] \\[kill-line] \\[kill-line].
1973 If `kill-whole-line' is non-nil, then this command kills the whole line
1974 including its terminating newline, when used at the beginning of a line
1975 with no argument. As a consequence, you can always kill a whole line
1976 by typing \\[beginning-of-line] \\[kill-line]."
1978 (kill-region (point)
1979 ;; It is better to move point to the other end of the kill
1980 ;; before killing. That way, in a read-only buffer, point
1981 ;; moves across the text that is copied to the kill ring.
1982 ;; The choice has no effect on undo now that undo records
1983 ;; the value of point from before the command was run.
1986 (forward-visible-line (prefix-numeric-value arg))
1988 (signal 'end-of-buffer nil))
1989 (if (or (looking-at "[ \t]*$") (and kill-whole-line (bolp)))
1990 (forward-visible-line 1)
1991 (end-of-visible-line)))
1994 (defun forward-visible-line (arg)
1995 "Move forward by ARG lines, ignoring currently invisible newlines only.
1996 If ARG is negative, move backward -ARG lines.
1997 If ARG is zero, move to the beginning of the current line."
2001 (or (zerop (forward-line 1))
2002 (signal 'end-of-buffer nil))
2003 ;; If the following character is currently invisible,
2004 ;; skip all characters with that same `invisible' property value,
2005 ;; then find the next newline.
2006 (while (and (not (eobp))
2008 (get-char-property (point) 'invisible)))
2009 (if (eq buffer-invisibility-spec t)
2011 (or (memq prop buffer-invisibility-spec)
2012 (assq prop buffer-invisibility-spec)))))
2014 (if (get-text-property (point) 'invisible)
2015 (or (next-single-property-change (point) 'invisible)
2017 (next-overlay-change (point))))
2018 (or (zerop (forward-line 1))
2019 (signal 'end-of-buffer nil)))
2020 (setq arg (1- arg)))
2022 (while (or first (< arg 0))
2025 (or (zerop (forward-line -1))
2026 (signal 'beginning-of-buffer nil)))
2027 (while (and (not (bobp))
2029 (get-char-property (1- (point)) 'invisible)))
2030 (if (eq buffer-invisibility-spec t)
2032 (or (memq prop buffer-invisibility-spec)
2033 (assq prop buffer-invisibility-spec)))))
2035 (if (get-text-property (1- (point)) 'invisible)
2036 (or (previous-single-property-change (point) 'invisible)
2038 (previous-overlay-change (point))))
2039 (or (zerop (forward-line -1))
2040 (signal 'beginning-of-buffer nil)))
2042 (setq arg (1+ arg)))))
2043 ((beginning-of-buffer end-of-buffer)
2046 (defun end-of-visible-line ()
2047 "Move to end of current visible line."
2049 ;; If the following character is currently invisible,
2050 ;; skip all characters with that same `invisible' property value,
2051 ;; then find the next newline.
2052 (while (and (not (eobp))
2054 (get-char-property (point) 'invisible)))
2055 (if (eq buffer-invisibility-spec t)
2057 (or (memq prop buffer-invisibility-spec)
2058 (assq prop buffer-invisibility-spec)))))
2059 (if (get-text-property (point) 'invisible)
2060 (goto-char (next-single-property-change (point) 'invisible))
2061 (goto-char (next-overlay-change (point))))
2064 (defun insert-buffer (buffer)
2065 "Insert after point the contents of BUFFER.
2066 Puts mark after the inserted text.
2067 BUFFER may be a buffer or a buffer name.
2069 This function is meant for the user to run interactively.
2070 Don't call it from programs!"
2074 (barf-if-buffer-read-only)
2075 (read-buffer "Insert buffer: "
2076 (if (eq (selected-window) (next-window (selected-window)))
2077 (other-buffer (current-buffer))
2078 (window-buffer (next-window (selected-window))))
2080 (or (bufferp buffer)
2081 (setq buffer (get-buffer buffer)))
2082 (let (start end newmark)
2086 (setq start (point-min) end (point-max)))
2087 (insert-buffer-substring buffer start end)
2088 (setq newmark (point)))
2089 (push-mark newmark))
2092 (defun append-to-buffer (buffer start end)
2093 "Append to specified buffer the text of the region.
2094 It is inserted into that buffer before its point.
2096 When calling from a program, give three arguments:
2097 BUFFER (or buffer name), START and END.
2098 START and END specify the portion of the current buffer to be copied."
2100 (list (read-buffer "Append to buffer: " (other-buffer (current-buffer) t))
2101 (region-beginning) (region-end)))
2102 (let ((oldbuf (current-buffer)))
2104 (let* ((append-to (get-buffer-create buffer))
2105 (windows (get-buffer-window-list append-to t t))
2107 (set-buffer append-to)
2108 (setq point (point))
2109 (barf-if-buffer-read-only)
2110 (insert-buffer-substring oldbuf start end)
2111 (dolist (window windows)
2112 (when (= (window-point window) point)
2113 (set-window-point window (point))))))))
2115 (defun prepend-to-buffer (buffer start end)
2116 "Prepend to specified buffer the text of the region.
2117 It is inserted into that buffer after its point.
2119 When calling from a program, give three arguments:
2120 BUFFER (or buffer name), START and END.
2121 START and END specify the portion of the current buffer to be copied."
2122 (interactive "BPrepend to buffer: \nr")
2123 (let ((oldbuf (current-buffer)))
2125 (set-buffer (get-buffer-create buffer))
2126 (barf-if-buffer-read-only)
2128 (insert-buffer-substring oldbuf start end)))))
2130 (defun copy-to-buffer (buffer start end)
2131 "Copy to specified buffer the text of the region.
2132 It is inserted into that buffer, replacing existing text there.
2134 When calling from a program, give three arguments:
2135 BUFFER (or buffer name), START and END.
2136 START and END specify the portion of the current buffer to be copied."
2137 (interactive "BCopy to buffer: \nr")
2138 (let ((oldbuf (current-buffer)))
2140 (set-buffer (get-buffer-create buffer))
2141 (barf-if-buffer-read-only)
2144 (insert-buffer-substring oldbuf start end)))))
2146 (put 'mark-inactive 'error-conditions '(mark-inactive error))
2147 (put 'mark-inactive 'error-message "The mark is not active now")
2149 (defun mark (&optional force)
2150 "Return this buffer's mark value as integer; error if mark inactive.
2151 If optional argument FORCE is non-nil, access the mark value
2152 even if the mark is not currently active, and return nil
2153 if there is no mark at all.
2155 If you are using this in an editing command, you are most likely making
2156 a mistake; see the documentation of `set-mark'."
2157 (if (or force (not transient-mark-mode) mark-active mark-even-if-inactive)
2158 (marker-position (mark-marker))
2159 (signal 'mark-inactive nil)))
2161 ;; Many places set mark-active directly, and several of them failed to also
2162 ;; run deactivate-mark-hook. This shorthand should simplify.
2163 (defsubst deactivate-mark ()
2164 "Deactivate the mark by setting `mark-active' to nil.
2165 \(That makes a difference only in Transient Mark mode.)
2166 Also runs the hook `deactivate-mark-hook'."
2167 (if transient-mark-mode
2169 (setq mark-active nil)
2170 (run-hooks 'deactivate-mark-hook))))
2172 (defun set-mark (pos)
2173 "Set this buffer's mark to POS. Don't use this function!
2174 That is to say, don't use this function unless you want
2175 the user to see that the mark has moved, and you want the previous
2176 mark position to be lost.
2178 Normally, when a new mark is set, the old one should go on the stack.
2179 This is why most applications should use push-mark, not set-mark.
2181 Novice Emacs Lisp programmers often try to use the mark for the wrong
2182 purposes. The mark saves a location for the user's convenience.
2183 Most editing commands should not alter the mark.
2184 To remember a location for internal use in the Lisp program,
2185 store it in a Lisp variable. Example:
2187 (let ((beg (point))) (forward-line 1) (delete-region beg (point)))."
2191 (setq mark-active t)
2192 (run-hooks 'activate-mark-hook)
2193 (set-marker (mark-marker) pos (current-buffer)))
2194 ;; Normally we never clear mark-active except in Transient Mark mode.
2195 ;; But when we actually clear out the mark value too,
2196 ;; we must clear mark-active in any mode.
2197 (setq mark-active nil)
2198 (run-hooks 'deactivate-mark-hook)
2199 (set-marker (mark-marker) nil)))
2201 (defvar mark-ring nil
2202 "The list of former marks of the current buffer, most recent first.")
2203 (make-variable-buffer-local 'mark-ring)
2204 (put 'mark-ring 'permanent-local t)
2206 (defcustom mark-ring-max 16
2207 "*Maximum size of mark ring. Start discarding off end if gets this big."
2209 :group 'editing-basics)
2211 (defvar global-mark-ring nil
2212 "The list of saved global marks, most recent first.")
2214 (defcustom global-mark-ring-max 16
2215 "*Maximum size of global mark ring. \
2216 Start discarding off end if gets this big."
2218 :group 'editing-basics)
2220 (defun set-mark-command (arg)
2221 "Set mark at where point is, or jump to mark.
2222 With no prefix argument, set mark, push old mark position on local mark
2223 ring, and push mark on global mark ring.
2224 With argument, jump to mark, and pop a new position for mark off the ring
2225 \(does not affect global mark ring\).
2227 Novice Emacs Lisp programmers often try to use the mark for the wrong
2228 purposes. See the documentation of `set-mark' for more information."
2232 (push-mark nil nil t))
2234 (error "No mark set in this buffer")
2235 (goto-char (mark t))
2238 (defun push-mark (&optional location nomsg activate)
2239 "Set mark at LOCATION (point, by default) and push old mark on mark ring.
2240 If the last global mark pushed was not in the current buffer,
2241 also push LOCATION on the global mark ring.
2242 Display `Mark set' unless the optional second arg NOMSG is non-nil.
2243 In Transient Mark mode, activate mark if optional third arg ACTIVATE non-nil.
2245 Novice Emacs Lisp programmers often try to use the mark for the wrong
2246 purposes. See the documentation of `set-mark' for more information.
2248 In Transient Mark mode, this does not activate the mark."
2251 (setq mark-ring (cons (copy-marker (mark-marker)) mark-ring))
2252 (if (> (length mark-ring) mark-ring-max)
2254 (move-marker (car (nthcdr mark-ring-max mark-ring)) nil)
2255 (setcdr (nthcdr (1- mark-ring-max) mark-ring) nil))))
2256 (set-marker (mark-marker) (or location (point)) (current-buffer))
2257 ;; Now push the mark on the global mark ring.
2258 (if (and global-mark-ring
2259 (eq (marker-buffer (car global-mark-ring)) (current-buffer)))
2260 ;; The last global mark pushed was in this same buffer.
2261 ;; Don't push another one.
2263 (setq global-mark-ring (cons (copy-marker (mark-marker)) global-mark-ring))
2264 (if (> (length global-mark-ring) global-mark-ring-max)
2266 (move-marker (car (nthcdr global-mark-ring-max global-mark-ring))
2268 (setcdr (nthcdr (1- global-mark-ring-max) global-mark-ring) nil))))
2269 (or nomsg executing-kbd-macro (> (minibuffer-depth) 0)
2270 (message "Mark set"))
2271 (if (or activate (not transient-mark-mode))
2272 (set-mark (mark t)))
2276 "Pop off mark ring into the buffer's actual mark.
2277 Does not set point. Does nothing if mark ring is empty."
2280 (setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker)))))
2281 (set-marker (mark-marker) (+ 0 (car mark-ring)) (current-buffer))
2283 (move-marker (car mark-ring) nil)
2284 (if (null (mark t)) (ding))
2285 (setq mark-ring (cdr mark-ring)))))
2287 (defalias 'exchange-dot-and-mark 'exchange-point-and-mark)
2288 (defun exchange-point-and-mark ()
2289 "Put the mark where point is now, and point where the mark is now.
2290 This command works even when the mark is not active,
2291 and it reactivates the mark."
2293 (let ((omark (mark t)))
2295 (error "No mark set in this buffer"))
2300 (defun transient-mark-mode (arg)
2301 "Toggle Transient Mark mode.
2302 With arg, turn Transient Mark mode on if arg is positive, off otherwise.
2304 In Transient Mark mode, when the mark is active, the region is highlighted.
2305 Changing the buffer \"deactivates\" the mark.
2306 So do certain other operations that set the mark
2307 but whose main purpose is something else--for example,
2308 incremental search, \\[beginning-of-buffer], and \\[end-of-buffer]."
2310 (setq transient-mark-mode
2312 (not transient-mark-mode)
2313 (> (prefix-numeric-value arg) 0)))
2315 (if transient-mark-mode
2316 (message "Transient Mark mode enabled")
2317 (message "Transient Mark mode disabled"))))
2319 (defun pop-global-mark ()
2320 "Pop off global mark ring and jump to the top location."
2322 ;; Pop entries which refer to non-existent buffers.
2323 (while (and global-mark-ring (not (marker-buffer (car global-mark-ring))))
2324 (setq global-mark-ring (cdr global-mark-ring)))
2325 (or global-mark-ring
2326 (error "No global mark set"))
2327 (let* ((marker (car global-mark-ring))
2328 (buffer (marker-buffer marker))
2329 (position (marker-position marker)))
2330 (setq global-mark-ring (nconc (cdr global-mark-ring)
2331 (list (car global-mark-ring))))
2333 (or (and (>= position (point-min))
2334 (<= position (point-max)))
2336 (goto-char position)
2337 (switch-to-buffer buffer)))
2339 (defcustom next-line-add-newlines t
2340 "*If non-nil, `next-line' inserts newline to avoid `end of buffer' error."
2342 :group 'editing-basics)
2344 (defun next-line (arg)
2345 "Move cursor vertically down ARG lines.
2346 If there is no character in the target line exactly under the current column,
2347 the cursor is positioned after the character in that line which spans this
2348 column, or at the end of the line if it is not long enough.
2349 If there is no line in the buffer after this one, behavior depends on the
2350 value of `next-line-add-newlines'. If non-nil, it inserts a newline character
2351 to create a line, and moves the cursor to that line. Otherwise it moves the
2352 cursor to the end of the buffer.
2354 The command \\[set-goal-column] can be used to create
2355 a semipermanent goal column for this command.
2356 Then instead of trying to move exactly vertically (or as close as possible),
2357 this command moves to the specified goal column (or as close as possible).
2358 The goal column is stored in the variable `goal-column', which is nil
2359 when there is no goal column.
2361 If you are thinking of using this in a Lisp program, consider
2362 using `forward-line' instead. It is usually easier to use
2363 and more reliable (no dependence on goal column, etc.)."
2365 (if (and next-line-add-newlines (= arg 1))
2366 (let ((opoint (point)))
2375 ((beginning-of-buffer end-of-buffer) (ding)))
2379 (defun previous-line (arg)
2380 "Move cursor vertically up ARG lines.
2381 If there is no character in the target line exactly over the current column,
2382 the cursor is positioned after the character in that line which spans this
2383 column, or at the end of the line if it is not long enough.
2385 The command \\[set-goal-column] can be used to create
2386 a semipermanent goal column for this command.
2387 Then instead of trying to move exactly vertically (or as close as possible),
2388 this command moves to the specified goal column (or as close as possible).
2389 The goal column is stored in the variable `goal-column', which is nil
2390 when there is no goal column.
2392 If you are thinking of using this in a Lisp program, consider using
2393 `forward-line' with a negative argument instead. It is usually easier
2394 to use and more reliable (no dependence on goal column, etc.)."
2399 ((beginning-of-buffer end-of-buffer) (ding)))
2400 (line-move (- arg)))
2403 (defcustom track-eol nil
2404 "*Non-nil means vertical motion starting at end of line keeps to ends of lines.
2405 This means moving to the end of each line moved onto.
2406 The beginning of a blank line does not count as the end of a line."
2408 :group 'editing-basics)
2410 (defcustom goal-column nil
2411 "*Semipermanent goal column for vertical motion, as set by \\[set-goal-column], or nil."
2412 :type '(choice integer
2413 (const :tag "None" nil))
2414 :group 'editing-basics)
2415 (make-variable-buffer-local 'goal-column)
2417 (defvar temporary-goal-column 0
2418 "Current goal column for vertical motion.
2419 It is the column where point was
2420 at the start of current run of vertical motion commands.
2421 When the `track-eol' feature is doing its job, the value is 9999.")
2423 (defcustom line-move-ignore-invisible nil
2424 "*Non-nil means \\[next-line] and \\[previous-line] ignore invisible lines.
2425 Outline mode sets this."
2427 :group 'editing-basics)
2429 ;; This is the guts of next-line and previous-line.
2430 ;; Arg says how many lines to move.
2431 (defun line-move (arg)
2432 ;; Don't run any point-motion hooks, and disregard intangibility,
2433 ;; for intermediate positions.
2434 (let ((inhibit-point-motion-hooks t)
2436 new line-end line-beg)
2439 (if (not (or (eq last-command 'next-line)
2440 (eq last-command 'previous-line)))
2441 (setq temporary-goal-column
2442 (if (and track-eol (eolp)
2443 ;; Don't count beg of empty line as end of line
2444 ;; unless we just did explicit end-of-line.
2445 (or (not (bolp)) (eq last-command 'end-of-line)))
2448 (if (and (not (integerp selective-display))
2449 (not line-move-ignore-invisible))
2450 ;; Use just newline characters.
2452 (progn (if (> arg 1) (forward-line (1- arg)))
2453 ;; This way of moving forward ARG lines
2454 ;; verifies that we have a newline after the last one.
2455 ;; It doesn't get confused by intangible text.
2457 (zerop (forward-line 1)))
2458 (and (zerop (forward-line arg))
2460 (signal (if (< arg 0)
2461 'beginning-of-buffer
2464 ;; Move by arg lines, but ignore invisible ones.
2467 (and (zerop (vertical-motion 1))
2468 (signal 'end-of-buffer nil))
2469 ;; If the following character is currently invisible,
2470 ;; skip all characters with that same `invisible' property value.
2471 (while (and (not (eobp))
2473 (get-char-property (point) 'invisible)))
2474 (if (eq buffer-invisibility-spec t)
2476 (or (memq prop buffer-invisibility-spec)
2477 (assq prop buffer-invisibility-spec)))))
2478 (if (get-text-property (point) 'invisible)
2479 (goto-char (next-single-property-change (point) 'invisible))
2480 (goto-char (next-overlay-change (point)))))
2481 (setq arg (1- arg)))
2484 (and (zerop (vertical-motion -1))
2485 (signal 'beginning-of-buffer nil))
2486 (while (and (not (bobp))
2488 (get-char-property (1- (point)) 'invisible)))
2489 (if (eq buffer-invisibility-spec t)
2491 (or (memq prop buffer-invisibility-spec)
2492 (assq prop buffer-invisibility-spec)))))
2493 (if (get-text-property (1- (point)) 'invisible)
2494 (goto-char (previous-single-property-change (point) 'invisible))
2495 (goto-char (previous-overlay-change (point)))))
2496 (setq arg (1+ arg))))
2497 (let ((buffer-invisibility-spec nil))
2498 (move-to-column (or goal-column temporary-goal-column))))
2500 ;; If we are moving into some intangible text,
2501 ;; look for following text on the same line which isn't intangible
2503 (setq line-end (save-excursion (end-of-line) (point)))
2504 (setq line-beg (save-excursion (beginning-of-line) (point)))
2505 (let ((after (and (< new (point-max))
2506 (get-char-property new 'intangible)))
2507 (before (and (> new (point-min))
2508 (get-char-property (1- new) 'intangible))))
2509 (when (and before (eq before after)
2511 (goto-char (point-min))
2512 (let ((inhibit-point-motion-hooks nil))
2514 (if (<= new line-end)
2515 (setq new (point)))))
2516 ;; NEW is where we want to move to.
2517 ;; LINE-BEG and LINE-END are the beginning and end of the line.
2518 ;; Move there in just one step, from our starting position,
2519 ;; with intangibility and point-motion hooks enabled this time.
2521 (setq inhibit-point-motion-hooks nil)
2522 (goto-char (constrain-to-field new opoint nil t
2523 'inhibit-line-move-field-capture))
2524 ;; If intangibility processing moved us to a different line,
2525 ;; readjust the horizontal position within the line we ended up at.
2526 (when (or (< (point) line-beg) (> (point) line-end))
2528 (setq inhibit-point-motion-hooks t)
2529 (setq line-end (save-excursion (end-of-line) (point)))
2531 (setq line-beg (point))
2532 (let ((buffer-invisibility-spec nil))
2533 (move-to-column (or goal-column temporary-goal-column)))
2534 (if (<= (point) line-end)
2536 (goto-char (point-min))
2537 (setq inhibit-point-motion-hooks nil)
2538 (goto-char (constrain-to-field new opoint nil t
2539 'inhibit-line-move-field-capture))
2543 ;;; Many people have said they rarely use this feature, and often type
2544 ;;; it by accident. Maybe it shouldn't even be on a key.
2545 (put 'set-goal-column 'disabled t)
2547 (defun set-goal-column (arg)
2548 "Set the current horizontal position as a goal for \\[next-line] and \\[previous-line].
2549 Those commands will move to this position in the line moved to
2550 rather than trying to keep the same horizontal position.
2551 With a non-nil argument, clears out the goal column
2552 so that \\[next-line] and \\[previous-line] resume vertical motion.
2553 The goal column is stored in the variable `goal-column'."
2557 (setq goal-column nil)
2558 (message "No goal column"))
2559 (setq goal-column (current-column))
2560 (message (substitute-command-keys
2561 "Goal column %d (use \\[set-goal-column] with an arg to unset it)")
2566 (defun scroll-other-window-down (lines)
2567 "Scroll the \"other window\" down.
2568 For more details, see the documentation for `scroll-other-window'."
2570 (scroll-other-window
2571 ;; Just invert the argument's meaning.
2572 ;; We can do that without knowing which window it will be.
2573 (if (eq lines '-) nil
2575 (- (prefix-numeric-value lines))))))
2576 (define-key esc-map [?\C-\S-v] 'scroll-other-window-down)
2578 (defun beginning-of-buffer-other-window (arg)
2579 "Move point to the beginning of the buffer in the other window.
2580 Leave mark at previous position.
2581 With arg N, put point N/10 of the way from the true beginning."
2583 (let ((orig-window (selected-window))
2584 (window (other-window-for-scrolling)))
2585 ;; We use unwind-protect rather than save-window-excursion
2586 ;; because the latter would preserve the things we want to change.
2589 (select-window window)
2590 ;; Set point and mark in that window's buffer.
2591 (beginning-of-buffer arg)
2592 ;; Set point accordingly.
2594 (select-window orig-window))))
2596 (defun end-of-buffer-other-window (arg)
2597 "Move point to the end of the buffer in the other window.
2598 Leave mark at previous position.
2599 With arg N, put point N/10 of the way from the true end."
2601 ;; See beginning-of-buffer-other-window for comments.
2602 (let ((orig-window (selected-window))
2603 (window (other-window-for-scrolling)))
2606 (select-window window)
2609 (select-window orig-window))))
2611 (defun transpose-chars (arg)
2612 "Interchange characters around point, moving forward one character.
2613 With prefix arg ARG, effect is to take character before point
2614 and drag it forward past ARG other characters (backward if ARG negative).
2615 If no argument and at end of line, the previous two chars are exchanged."
2617 (and (null arg) (eolp) (forward-char -1))
2618 (transpose-subr 'forward-char (prefix-numeric-value arg)))
2620 (defun transpose-words (arg)
2621 "Interchange words around point, leaving point at end of them.
2622 With prefix arg ARG, effect is to take word before or around point
2623 and drag it forward past ARG other words (backward if ARG negative).
2624 If ARG is zero, the words around or after point and around or after mark
2627 (transpose-subr 'forward-word arg))
2629 (defun transpose-sexps (arg)
2630 "Like \\[transpose-words] but applies to sexps.
2631 Does not work on a sexp that point is in the middle of
2632 if it is a list or string."
2634 (transpose-subr 'forward-sexp arg))
2636 (defun transpose-lines (arg)
2637 "Exchange current line and previous line, leaving point after both.
2638 With argument ARG, takes previous line and moves it past ARG lines.
2639 With argument 0, interchanges line point is in with line mark is in."
2641 (transpose-subr (function
2645 ;; Move forward over ARG lines,
2646 ;; but create newlines if necessary.
2647 (setq arg (forward-line arg))
2648 (if (/= (preceding-char) ?\n)
2649 (setq arg (1+ arg)))
2652 (forward-line arg))))
2655 (defvar transpose-subr-start1)
2656 (defvar transpose-subr-start2)
2657 (defvar transpose-subr-end1)
2658 (defvar transpose-subr-end2)
2660 (defun transpose-subr (mover arg)
2661 (let (transpose-subr-start1
2663 transpose-subr-start2
2664 transpose-subr-end2)
2669 (setq transpose-subr-end2 (point))
2671 (setq transpose-subr-start2 (point))
2674 (setq transpose-subr-end1 (point))
2676 (setq transpose-subr-start1 (point))
2678 (exchange-point-and-mark))
2682 (setq transpose-subr-start1 (point))
2684 (setq transpose-subr-end1 (point))
2686 (setq transpose-subr-end2 (point))
2687 (funcall mover (- arg))
2688 (setq transpose-subr-start2 (point))
2690 (goto-char transpose-subr-end2))
2692 (setq transpose-subr-start2 (point))
2694 (setq transpose-subr-end2 (point))
2695 (funcall mover (1- arg))
2696 (setq transpose-subr-start1 (point))
2697 (funcall mover (- arg))
2698 (setq transpose-subr-end1 (point))
2699 (transpose-subr-1)))))
2701 (defun transpose-subr-1 ()
2702 (if (> (min transpose-subr-end1 transpose-subr-end2)
2703 (max transpose-subr-start1 transpose-subr-start2))
2704 (error "Don't have two things to transpose"))
2705 (let* ((word1 (buffer-substring transpose-subr-start1 transpose-subr-end1))
2706 (len1 (length word1))
2707 (word2 (buffer-substring transpose-subr-start2 transpose-subr-end2))
2708 (len2 (length word2)))
2709 (delete-region transpose-subr-start2 transpose-subr-end2)
2710 (goto-char transpose-subr-start2)
2712 (goto-char (if (< transpose-subr-start1 transpose-subr-start2)
2713 transpose-subr-start1
2714 (+ transpose-subr-start1 (- len1 len2))))
2715 (delete-region (point) (+ (point) len1))
2718 (defun backward-word (arg)
2719 "Move backward until encountering the end of a word.
2720 With argument, do this that many times."
2722 (forward-word (- arg)))
2724 (defun mark-word (arg)
2725 "Set mark arg words away from point."
2733 (defun kill-word (arg)
2734 "Kill characters forward until encountering the end of a word.
2735 With argument, do this that many times."
2737 (kill-region (point) (progn (forward-word arg) (point))))
2739 (defun backward-kill-word (arg)
2740 "Kill characters backward until encountering the end of a word.
2741 With argument, do this that many times."
2743 (kill-word (- arg)))
2745 (defun current-word (&optional strict)
2746 "Return the word point is on (or a nearby word) as a string.
2747 If optional arg STRICT is non-nil, return nil unless point is within
2748 or adjacent to a word."
2750 (let ((oldpoint (point)) (start (point)) (end (point)))
2751 (skip-syntax-backward "w_") (setq start (point))
2752 (goto-char oldpoint)
2753 (skip-syntax-forward "w_") (setq end (point))
2754 (if (and (eq start oldpoint) (eq end oldpoint))
2755 ;; Point is neither within nor adjacent to a word.
2758 ;; Look for preceding word in same line.
2759 (skip-syntax-backward "^w_"
2760 (save-excursion (beginning-of-line)
2763 ;; No preceding word in same line.
2764 ;; Look for following word in same line.
2766 (skip-syntax-forward "^w_"
2767 (save-excursion (end-of-line)
2769 (setq start (point))
2770 (skip-syntax-forward "w_")
2773 (skip-syntax-backward "w_")
2774 (setq start (point)))
2775 (buffer-substring-no-properties start end)))
2776 (buffer-substring-no-properties start end)))))
2778 (defcustom fill-prefix nil
2779 "*String for filling to insert at front of new line, or nil for none.
2780 Setting this variable automatically makes it local to the current buffer."
2781 :type '(choice (const :tag "None" nil)
2784 (make-variable-buffer-local 'fill-prefix)
2786 (defcustom auto-fill-inhibit-regexp nil
2787 "*Regexp to match lines which should not be auto-filled."
2788 :type '(choice (const :tag "None" nil)
2792 (defvar comment-line-break-function 'comment-indent-new-line
2793 "*Mode-specific function which line breaks and continues a comment.
2795 This function is only called during auto-filling of a comment section.
2796 The function should take a single optional argument, which is a flag
2797 indicating whether it should use soft newlines.
2799 Setting this variable automatically makes it local to the current buffer.")
2801 ;; This function is used as the auto-fill-function of a buffer
2802 ;; when Auto-Fill mode is enabled.
2803 ;; It returns t if it really did any work.
2804 ;; (Actually some major modes use a different auto-fill function,
2805 ;; but this one is the default one.)
2806 (defun do-auto-fill ()
2807 (let (fc justify bol give-up
2808 (fill-prefix fill-prefix))
2809 (if (or (not (setq justify (current-justification)))
2810 (null (setq fc (current-fill-column)))
2811 (and (eq justify 'left)
2812 (<= (current-column) fc))
2813 (save-excursion (beginning-of-line)
2815 (and auto-fill-inhibit-regexp
2816 (looking-at auto-fill-inhibit-regexp))))
2817 nil ;; Auto-filling not required
2818 (if (memq justify '(full center right))
2819 (save-excursion (unjustify-current-line)))
2821 ;; Choose a fill-prefix automatically.
2822 (if (and adaptive-fill-mode
2823 (or (null fill-prefix) (string= fill-prefix "")))
2825 (fill-context-prefix
2826 (save-excursion (backward-paragraph 1) (point))
2827 (save-excursion (forward-paragraph 1) (point)))))
2828 (and prefix (not (equal prefix ""))
2829 (setq fill-prefix prefix))))
2831 (while (and (not give-up) (> (current-column) fc))
2832 ;; Determine where to split the line.
2835 (let ((opoint (point))
2840 (setq after-prefix (point))
2842 (looking-at (regexp-quote fill-prefix))
2843 (setq after-prefix (match-end 0)))
2844 (move-to-column (1+ fc))
2845 ;; Move back to the point where we can break the line.
2846 ;; We break the line between word or
2847 ;; after/before the character which has character
2848 ;; category `|'. We search space, \c| followed by
2849 ;; a character, or \c| following a character. If
2850 ;; not found, place the point at beginning of line.
2852 ;; If this is after period and a single space,
2853 ;; move back once more--we don't want to break
2854 ;; the line there and make it look like a
2858 sentence-end-double-space
2859 (save-excursion (forward-char -1)
2860 (and (looking-at "\\. ")
2861 (not (looking-at "\\. ")))))
2864 fill-nobreak-predicate
2865 (funcall fill-nobreak-predicate)))
2867 (re-search-backward "[ \t]\\|\\c|.\\|.\\c|\\|^")
2868 ;; If we find nowhere on the line to break it,
2869 ;; break after one word. Set bounce to t
2870 ;; so we will not keep going in this while loop.
2871 (if (<= (point) after-prefix)
2873 (goto-char after-prefix)
2874 (re-search-forward "[ \t]" opoint t)
2876 (if (looking-at "[ \t]")
2877 ;; Break the line at word boundary.
2878 (skip-chars-backward " \t")
2879 ;; Break the line after/before \c|.
2881 (if enable-multibyte-characters
2882 ;; If we are going to break the line after or
2883 ;; before a non-ascii character, we may have
2884 ;; to run a special function for the charset
2885 ;; of the character to find the correct break
2887 (if (not (and (eq (charset-after (1- (point))) 'ascii)
2888 (eq (charset-after (point)) 'ascii)))
2889 (fill-find-break-point after-prefix)))
2891 ;; Let fill-point be set to the place where we end up.
2892 ;; But move back before any whitespace here.
2893 (skip-chars-backward " \t")
2896 ;; See whether the place we found is any good.
2898 (goto-char fill-point)
2900 ;; There is no use breaking at end of line.
2901 (not (save-excursion (skip-chars-forward " ") (eolp)))
2902 ;; It is futile to split at the end of the prefix
2903 ;; since we would just insert the prefix again.
2904 (not (and after-prefix (<= (point) after-prefix)))
2905 ;; Don't split right after a comment starter
2906 ;; since we would just make another comment starter.
2907 (not (and comment-start-skip
2908 (let ((limit (point)))
2910 (and (re-search-forward comment-start-skip
2912 (eq (point) limit)))))))
2913 ;; Ok, we have a useful place to break the line. Do it.
2914 (let ((prev-column (current-column)))
2915 ;; If point is at the fill-point, do not `save-excursion'.
2916 ;; Otherwise, if a comment prefix or fill-prefix is inserted,
2917 ;; point will end up before it rather than after it.
2919 (skip-chars-backward " \t")
2920 (= (point) fill-point))
2921 (funcall comment-line-break-function t)
2923 (goto-char fill-point)
2924 (funcall comment-line-break-function t)))
2925 ;; Now do justification, if required
2926 (if (not (eq justify 'left))
2929 (justify-current-line justify nil t)))
2930 ;; If making the new line didn't reduce the hpos of
2931 ;; the end of the line, then give up now;
2932 ;; trying again will not help.
2933 (if (>= (current-column) prev-column)
2935 ;; No good place to break => stop trying.
2937 ;; Justify last line.
2938 (justify-current-line justify t t)
2941 (defvar normal-auto-fill-function 'do-auto-fill
2942 "The function to use for `auto-fill-function' if Auto Fill mode is turned on.
2943 Some major modes set this.")
2945 (defun auto-fill-mode (&optional arg)
2946 "Toggle Auto Fill mode.
2947 With arg, turn Auto Fill mode on if and only if arg is positive.
2948 In Auto Fill mode, inserting a space at a column beyond `current-fill-column'
2949 automatically breaks the line at a previous space.
2951 The value of `normal-auto-fill-function' specifies the function to use
2952 for `auto-fill-function' when turning Auto Fill mode on."
2954 (prog1 (setq auto-fill-function
2956 (not auto-fill-function)
2957 (> (prefix-numeric-value arg) 0))
2958 normal-auto-fill-function
2960 (force-mode-line-update)))
2962 ;; This holds a document string used to document auto-fill-mode.
2963 (defun auto-fill-function ()
2964 "Automatically break line at a previous space, in insertion of text."
2967 (defun turn-on-auto-fill ()
2968 "Unconditionally turn on Auto Fill mode."
2971 (defun turn-off-auto-fill ()
2972 "Unconditionally turn off Auto Fill mode."
2973 (auto-fill-mode -1))
2975 (custom-add-option 'text-mode-hook 'turn-on-auto-fill)
2977 (defun set-fill-column (arg)
2978 "Set `fill-column' to specified argument.
2979 Use \\[universal-argument] followed by a number to specify a column.
2980 Just \\[universal-argument] as argument means to use the current column."
2983 (setq arg (current-column)))
2984 (if (not (integerp arg))
2985 ;; Disallow missing argument; it's probably a typo for C-x C-f.
2986 (error "set-fill-column requires an explicit argument")
2987 (message "Fill column set to %d (was %d)" arg fill-column)
2988 (setq fill-column arg)))
2990 (defun set-selective-display (arg)
2991 "Set `selective-display' to ARG; clear it if no arg.
2992 When the value of `selective-display' is a number > 0,
2993 lines whose indentation is >= that value are not displayed.
2994 The variable `selective-display' has a separate value for each buffer."
2996 (if (eq selective-display t)
2997 (error "selective-display already in use for marked lines"))
3000 (narrow-to-region (point-min) (point))
3001 (goto-char (window-start))
3002 (vertical-motion (window-height)))))
3003 (setq selective-display
3004 (and arg (prefix-numeric-value arg)))
3005 (recenter current-vpos))
3006 (set-window-start (selected-window) (window-start (selected-window)))
3007 (princ "selective-display set to " t)
3008 (prin1 selective-display t)
3011 (defvar overwrite-mode-textual " Ovwrt"
3012 "The string displayed in the mode line when in overwrite mode.")
3013 (defvar overwrite-mode-binary " Bin Ovwrt"
3014 "The string displayed in the mode line when in binary overwrite mode.")
3016 (defun overwrite-mode (arg)
3017 "Toggle overwrite mode.
3018 With arg, turn overwrite mode on iff arg is positive.
3019 In overwrite mode, printing characters typed in replace existing text
3020 on a one-for-one basis, rather than pushing it to the right. At the
3021 end of a line, such characters extend the line. Before a tab,
3022 such characters insert until the tab is filled in.
3023 \\[quoted-insert] still inserts characters in overwrite mode; this
3024 is supposed to make it easier to insert characters when necessary."
3026 (setq overwrite-mode
3027 (if (if (null arg) (not overwrite-mode)
3028 (> (prefix-numeric-value arg) 0))
3029 'overwrite-mode-textual))
3030 (force-mode-line-update))
3032 (defun binary-overwrite-mode (arg)
3033 "Toggle binary overwrite mode.
3034 With arg, turn binary overwrite mode on iff arg is positive.
3035 In binary overwrite mode, printing characters typed in replace
3036 existing text. Newlines are not treated specially, so typing at the
3037 end of a line joins the line to the next, with the typed character
3038 between them. Typing before a tab character simply replaces the tab
3039 with the character typed.
3040 \\[quoted-insert] replaces the text at the cursor, just as ordinary
3041 typing characters do.
3043 Note that binary overwrite mode is not its own minor mode; it is a
3044 specialization of overwrite-mode, entered by setting the
3045 `overwrite-mode' variable to `overwrite-mode-binary'."
3047 (setq overwrite-mode
3049 (not (eq overwrite-mode 'overwrite-mode-binary))
3050 (> (prefix-numeric-value arg) 0))
3051 'overwrite-mode-binary))
3052 (force-mode-line-update))
3054 (defcustom line-number-mode t
3055 "*Non-nil means display line number in mode line."
3057 :group 'editing-basics)
3059 (defun line-number-mode (arg)
3060 "Toggle Line Number mode.
3061 With arg, turn Line Number mode on iff arg is positive.
3062 When Line Number mode is enabled, the line number appears
3065 Line numbers do not appear for very large buffers, see variable
3066 `line-number-display-limit'."
3068 (setq line-number-mode
3069 (if (null arg) (not line-number-mode)
3070 (> (prefix-numeric-value arg) 0)))
3071 (force-mode-line-update))
3073 (defcustom column-number-mode nil
3074 "*Non-nil means display column number in mode line."
3076 :group 'editing-basics)
3078 (defun column-number-mode (arg)
3079 "Toggle Column Number mode.
3080 With arg, turn Column Number mode on iff arg is positive.
3081 When Column Number mode is enabled, the column number appears
3084 (setq column-number-mode
3085 (if (null arg) (not column-number-mode)
3086 (> (prefix-numeric-value arg) 0)))
3087 (force-mode-line-update))
3089 (defgroup paren-blinking nil
3090 "Blinking matching of parens and expressions."
3091 :prefix "blink-matching-"
3092 :group 'paren-matching)
3094 (defcustom blink-matching-paren t
3095 "*Non-nil means show matching open-paren when close-paren is inserted."
3097 :group 'paren-blinking)
3099 (defcustom blink-matching-paren-on-screen t
3100 "*Non-nil means show matching open-paren when it is on screen.
3101 If nil, means don't show it (but the open-paren can still be shown
3102 when it is off screen)."
3104 :group 'paren-blinking)
3106 (defcustom blink-matching-paren-distance (* 25 1024)
3107 "*If non-nil, is maximum distance to search for matching open-paren."
3109 :group 'paren-blinking)
3111 (defcustom blink-matching-delay 1
3112 "*Time in seconds to delay after showing a matching paren."
3114 :group 'paren-blinking)
3116 (defcustom blink-matching-paren-dont-ignore-comments nil
3117 "*Non-nil means `blink-matching-paren' will not ignore comments."
3119 :group 'paren-blinking)
3121 (defun blink-matching-open ()
3122 "Move cursor momentarily to the beginning of the sexp before point."
3124 (and (> (point) (1+ (point-min)))
3125 blink-matching-paren
3126 ;; Verify an even number of quoting characters precede the close.
3127 (= 1 (logand 1 (- (point)
3130 (skip-syntax-backward "/\\")
3132 (let* ((oldpos (point))
3137 (if blink-matching-paren-distance
3138 (narrow-to-region (max (point-min)
3139 (- (point) blink-matching-paren-distance))
3142 (let ((parse-sexp-ignore-comments
3143 (and parse-sexp-ignore-comments
3144 (not blink-matching-paren-dont-ignore-comments))))
3145 (setq blinkpos (scan-sexps oldpos -1)))
3148 (/= (char-syntax (char-after blinkpos))
3151 (or (null (matching-paren (char-after blinkpos)))
3152 (/= (char-after (1- oldpos))
3153 (matching-paren (char-after blinkpos))))))
3154 (if mismatch (setq blinkpos nil))
3156 ;; Don't log messages about paren matching.
3157 (let (message-log-max)
3158 (goto-char blinkpos)
3159 (if (pos-visible-in-window-p)
3160 (and blink-matching-paren-on-screen
3161 (sit-for blink-matching-delay))
3162 (goto-char blinkpos)
3165 ;; Show what precedes the open in its line, if anything.
3167 (skip-chars-backward " \t")
3169 (buffer-substring (progn (beginning-of-line) (point))
3171 ;; Show what follows the open in its line, if anything.
3174 (skip-chars-forward " \t")
3176 (buffer-substring blinkpos
3177 (progn (end-of-line) (point)))
3178 ;; Otherwise show the previous nonblank line,
3181 (skip-chars-backward "\n \t")
3184 (buffer-substring (progn
3185 (skip-chars-backward "\n \t")
3188 (progn (end-of-line)
3189 (skip-chars-backward " \t")
3191 ;; Replace the newline and other whitespace with `...'.
3193 (buffer-substring blinkpos (1+ blinkpos)))
3194 ;; There is nothing to show except the char itself.
3195 (buffer-substring blinkpos (1+ blinkpos))))))))
3197 (message "Mismatched parentheses"))
3198 ((not blink-matching-paren-distance)
3199 (message "Unmatched parenthesis"))))))))
3201 ;Turned off because it makes dbx bomb out.
3202 (setq blink-paren-function 'blink-matching-open)
3204 ;; This executes C-g typed while Emacs is waiting for a command.
3205 ;; Quitting out of a program does not go through here;
3206 ;; that happens in the QUIT macro at the C code level.
3207 (defun keyboard-quit ()
3208 "Signal a `quit' condition.
3209 During execution of Lisp code, this character causes a quit directly.
3210 At top-level, as an editor command, this simply beeps."
3215 (define-key global-map "\C-g" 'keyboard-quit)
3217 (defvar buffer-quit-function nil
3218 "Function to call to \"quit\" the current buffer, or nil if none.
3219 \\[keyboard-escape-quit] calls this function when its more local actions
3220 \(such as cancelling a prefix argument, minibuffer or region) do not apply.")
3222 (defun keyboard-escape-quit ()
3223 "Exit the current \"mode\" (in a generalized sense of the word).
3224 This command can exit an interactive command such as `query-replace',
3225 can clear out a prefix argument or a region,
3226 can get out of the minibuffer or other recursive edit,
3227 cancel the use of the current buffer (for special-purpose buffers),
3228 or go back to just one window (by deleting all but the selected window)."
3230 (cond ((eq last-command 'mode-exited) nil)
3231 ((> (minibuffer-depth) 0)
3232 (abort-recursive-edit))
3235 ((and transient-mark-mode
3238 ((> (recursion-depth) 0)
3239 (exit-recursive-edit))
3240 (buffer-quit-function
3241 (funcall buffer-quit-function))
3242 ((not (one-window-p t))
3243 (delete-other-windows))
3244 ((string-match "^ \\*" (buffer-name (current-buffer)))
3247 (define-key global-map "\e\e\e" 'keyboard-escape-quit)
3249 (defcustom input-mode-8-bit t
3250 "Control acceptance of 8-bit keyboard input.
3251 This may be useful for inputting non-ASCII characters if your keyboard
3252 can generate them. It is not necessary to change this under a window
3253 system which can distinguish 8-bit characters and Meta keys.
3254 Setting this variable directly does not take effect;
3255 use either M-x customize or the function `set-input-mode'."
3256 :set (lambda (symbol value)
3257 (let ((mode (current-input-mode)))
3258 (set-input-mode (nth 0 mode) (nth 1 mode) value)))
3259 :initialize 'custom-initialize-default
3260 :type '(choice (const :tag "8-bit input for a Meta key" t)
3261 (const :tag "Direct 8-bit character input" 0)
3262 (const :tag "Assume top bit is parity and ignore" nil))
3264 :link '(custom-manual "Single-Byte European Support")
3267 (defcustom read-mail-command 'rmail
3268 "*Your preference for a mail reading package.
3269 This is used by some keybindings which support reading mail.
3270 See also `mail-user-agent' concerning sending mail."
3271 :type '(choice (function-item rmail)
3272 (function-item gnus)
3273 (function-item mh-rmail)
3274 (function :tag "Other"))
3278 (defcustom mail-user-agent 'sendmail-user-agent
3279 "*Your preference for a mail composition package.
3280 Various Emacs Lisp packages (e.g. Reporter) require you to compose an
3281 outgoing email message. This variable lets you specify which
3282 mail-sending package you prefer.
3284 Valid values include:
3286 `sendmail-user-agent' -- use the default Emacs Mail package.
3287 See Info node `(emacs)Sending Mail'.
3288 `mh-e-user-agent' -- use the Emacs interface to the MH mail system.
3289 See Info node `(mh-e)'.
3290 `message-user-agent' -- use the Gnus Message package.
3291 See Info node `(message)'.
3292 `gnus-user-agent' -- like `message-user-agent', but with Gnus
3293 paraphernalia, particularly the Gcc: header for
3296 Additional valid symbols may be available; check with the author of
3297 your package for details.
3299 See also `read-mail-command' concerning reading mail."
3300 :type '(radio (function-item :tag "Default Emacs mail"
3302 sendmail-user-agent)
3303 (function-item :tag "Emacs interface to MH"
3306 (function-item :tag "Gnus Message package"
3309 (function-item :tag "Gnus Message with full Gnus features"
3312 (function :tag "Other"))
3315 (defun define-mail-user-agent (symbol composefunc sendfunc
3316 &optional abortfunc hookvar)
3317 "Define a symbol to identify a mail-sending package for `mail-user-agent'.
3319 SYMBOL can be any Lisp symbol. Its function definition and/or
3320 value as a variable do not matter for this usage; we use only certain
3321 properties on its property list, to encode the rest of the arguments.
3323 COMPOSEFUNC is program callable function that composes an outgoing
3324 mail message buffer. This function should set up the basics of the
3325 buffer without requiring user interaction. It should populate the
3326 standard mail headers, leaving the `to:' and `subject:' headers blank
3329 COMPOSEFUNC should accept several optional arguments--the same
3330 arguments that `compose-mail' takes. See that function's documentation.
3332 SENDFUNC is the command a user would run to send the message.
3334 Optional ABORTFUNC is the command a user would run to abort the
3335 message. For mail packages that don't have a separate abort function,
3336 this can be `kill-buffer' (the equivalent of omitting this argument).
3338 Optional HOOKVAR is a hook variable that gets run before the message
3339 is actually sent. Callers that use the `mail-user-agent' may
3340 install a hook function temporarily on this hook variable.
3341 If HOOKVAR is nil, `mail-send-hook' is used.
3343 The properties used on SYMBOL are `composefunc', `sendfunc',
3344 `abortfunc', and `hookvar'."
3345 (put symbol 'composefunc composefunc)
3346 (put symbol 'sendfunc sendfunc)
3347 (put symbol 'abortfunc (or abortfunc 'kill-buffer))
3348 (put symbol 'hookvar (or hookvar 'mail-send-hook)))
3350 (define-mail-user-agent 'sendmail-user-agent
3351 'sendmail-user-agent-compose
3352 'mail-send-and-exit)
3354 (defun rfc822-goto-eoh ()
3355 ;; Go to header delimiter line in a mail message, following RFC822 rules
3356 (goto-char (point-min))
3357 (while (looking-at "^[^: \n]+:\\|^[ \t]")
3361 (defun sendmail-user-agent-compose (&optional to subject other-headers continue
3362 switch-function yank-action
3365 (let ((special-display-buffer-names nil)
3366 (special-display-regexps nil)
3367 (same-window-buffer-names nil)
3368 (same-window-regexps nil))
3369 (funcall switch-function "*mail*")))
3370 (let ((cc (cdr (assoc-ignore-case "cc" other-headers)))
3371 (in-reply-to (cdr (assoc-ignore-case "in-reply-to" other-headers)))
3372 (body (cdr (assoc-ignore-case "body" other-headers))))
3373 (or (mail continue to subject in-reply-to cc yank-action send-actions)
3375 (error "Message aborted"))
3378 (while other-headers
3379 (unless (member-ignore-case (car (car other-headers))
3380 '("in-reply-to" "cc" "body"))
3381 (insert (car (car other-headers)) ": "
3382 (cdr (car other-headers)) "\n"))
3383 (setq other-headers (cdr other-headers)))
3389 (define-mail-user-agent 'mh-e-user-agent
3390 'mh-smail-batch 'mh-send-letter 'mh-fully-kill-draft
3391 'mh-before-send-letter-hook)
3393 (defun compose-mail (&optional to subject other-headers continue
3394 switch-function yank-action send-actions)
3395 "Start composing a mail message to send.
3396 This uses the user's chosen mail composition package
3397 as selected with the variable `mail-user-agent'.
3398 The optional arguments TO and SUBJECT specify recipients
3399 and the initial Subject field, respectively.
3401 OTHER-HEADERS is an alist specifying additional
3402 header fields. Elements look like (HEADER . VALUE) where both
3403 HEADER and VALUE are strings.
3405 CONTINUE, if non-nil, says to continue editing a message already
3408 SWITCH-FUNCTION, if non-nil, is a function to use to
3409 switch to and display the buffer used for mail composition.
3411 YANK-ACTION, if non-nil, is an action to perform, if and when necessary,
3412 to insert the raw text of the message being replied to.
3413 It has the form (FUNCTION . ARGS). The user agent will apply
3414 FUNCTION to ARGS, to insert the raw text of the original message.
3415 \(The user agent will also run `mail-citation-hook', *after* the
3416 original text has been inserted in this way.)
3418 SEND-ACTIONS is a list of actions to call when the message is sent.
3419 Each action has the form (FUNCTION . ARGS)."
3421 (list nil nil nil current-prefix-arg))
3422 (let ((function (get mail-user-agent 'composefunc)))
3423 (funcall function to subject other-headers continue
3424 switch-function yank-action send-actions)))
3426 (defun compose-mail-other-window (&optional to subject other-headers continue
3427 yank-action send-actions)
3428 "Like \\[compose-mail], but edit the outgoing message in another window."
3430 (list nil nil nil current-prefix-arg))
3431 (compose-mail to subject other-headers continue
3432 'switch-to-buffer-other-window yank-action send-actions))
3435 (defun compose-mail-other-frame (&optional to subject other-headers continue
3436 yank-action send-actions)
3437 "Like \\[compose-mail], but edit the outgoing message in another frame."
3439 (list nil nil nil current-prefix-arg))
3440 (compose-mail to subject other-headers continue
3441 'switch-to-buffer-other-frame yank-action send-actions))
3443 (defvar set-variable-value-history nil
3444 "History of values entered with `set-variable'.")
3446 (defun set-variable (var val)
3447 "Set VARIABLE to VALUE. VALUE is a Lisp object.
3448 When using this interactively, enter a Lisp object for VALUE.
3449 If you want VALUE to be a string, you must surround it with doublequotes.
3450 VALUE is used literally, not evaluated.
3452 If VARIABLE has a `variable-interactive' property, that is used as if
3453 it were the arg to `interactive' (which see) to interactively read VALUE.
3455 If VARIABLE has been defined with `defcustom', then the type information
3456 in the definition is used to check that VALUE is valid."
3458 (let* ((default-var (variable-at-point))
3459 (var (if (symbolp default-var)
3460 (read-variable (format "Set variable (default %s): " default-var)
3462 (read-variable "Set variable: ")))
3463 (minibuffer-help-form '(describe-variable var))
3464 (prop (get var 'variable-interactive))
3465 (prompt (format "Set %s to value: " var))
3467 ;; Use VAR's `variable-interactive' property
3468 ;; as an interactive spec for prompting.
3469 (call-interactively `(lambda (arg)
3473 (read-string prompt nil
3474 'set-variable-value-history)))))
3477 (let ((type (get var 'custom-type)))
3479 ;; Match with custom type.
3481 (setq type (widget-convert type))
3482 (unless (widget-apply type :match val)
3483 (error "Value `%S' does not match type %S of %S"
3484 val (car type) var))))
3487 ;; Define the major mode for lists of completions.
3489 (defvar completion-list-mode-map nil
3490 "Local map for completion list buffers.")
3491 (or completion-list-mode-map
3492 (let ((map (make-sparse-keymap)))
3493 (define-key map [mouse-2] 'mouse-choose-completion)
3494 (define-key map [down-mouse-2] nil)
3495 (define-key map "\C-m" 'choose-completion)
3496 (define-key map "\e\e\e" 'delete-completion-window)
3497 (define-key map [left] 'previous-completion)
3498 (define-key map [right] 'next-completion)
3499 (setq completion-list-mode-map map)))
3501 ;; Completion mode is suitable only for specially formatted data.
3502 (put 'completion-list-mode 'mode-class 'special)
3504 (defvar completion-reference-buffer nil
3505 "Record the buffer that was current when the completion list was requested.
3506 This is a local variable in the completion list buffer.
3507 Initial value is nil to avoid some compiler warnings.")
3509 (defvar completion-no-auto-exit nil
3510 "Non-nil means `choose-completion-string' should never exit the minibuffer.
3511 This also applies to other functions such as `choose-completion'
3512 and `mouse-choose-completion'.")
3514 (defvar completion-base-size nil
3515 "Number of chars at beginning of minibuffer not involved in completion.
3516 This is a local variable in the completion list buffer
3517 but it talks about the buffer in `completion-reference-buffer'.
3518 If this is nil, it means to compare text to determine which part
3519 of the tail end of the buffer's text is involved in completion.")
3521 (defun delete-completion-window ()
3522 "Delete the completion list window.
3523 Go to the window from which completion was requested."
3525 (let ((buf completion-reference-buffer))
3526 (if (one-window-p t)
3527 (if (window-dedicated-p (selected-window))
3528 (delete-frame (selected-frame)))
3529 (delete-window (selected-window))
3530 (if (get-buffer-window buf)
3531 (select-window (get-buffer-window buf))))))
3533 (defun previous-completion (n)
3534 "Move to the previous item in the completion list."
3536 (next-completion (- n)))
3538 (defun next-completion (n)
3539 "Move to the next item in the completion list.
3540 With prefix argument N, move N items (negative N means move backward)."
3542 (let ((beg (point-min)) (end (point-max)))
3543 (while (and (> n 0) (not (eobp)))
3544 ;; If in a completion, move to the end of it.
3545 (when (get-text-property (point) 'mouse-face)
3546 (goto-char (next-single-property-change (point) 'mouse-face nil end)))
3547 ;; Move to start of next one.
3548 (unless (get-text-property (point) 'mouse-face)
3549 (goto-char (next-single-property-change (point) 'mouse-face nil end)))
3551 (while (and (< n 0) (not (bobp)))
3552 (let ((prop (get-text-property (1- (point)) 'mouse-face)))
3553 ;; If in a completion, move to the start of it.
3554 (when (and prop (eq prop (get-text-property (point) 'mouse-face)))
3555 (goto-char (previous-single-property-change
3556 (point) 'mouse-face nil beg)))
3557 ;; Move to end of the previous completion.
3558 (unless (or (bobp) (get-text-property (1- (point)) 'mouse-face))
3559 (goto-char (previous-single-property-change
3560 (point) 'mouse-face nil beg)))
3561 ;; Move to the start of that one.
3562 (goto-char (previous-single-property-change
3563 (point) 'mouse-face nil beg))
3566 (defun choose-completion ()
3567 "Choose the completion that point is in or next to."
3569 (let (beg end completion (buffer completion-reference-buffer)
3570 (base-size completion-base-size))
3571 (if (and (not (eobp)) (get-text-property (point) 'mouse-face))
3572 (setq end (point) beg (1+ (point))))
3573 (if (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face))
3574 (setq end (1- (point)) beg (point)))
3576 (error "No completion here"))
3577 (setq beg (previous-single-property-change beg 'mouse-face))
3578 (setq end (or (next-single-property-change end 'mouse-face) (point-max)))
3579 (setq completion (buffer-substring beg end))
3580 (let ((owindow (selected-window)))
3581 (if (and (one-window-p t 'selected-frame)
3582 (window-dedicated-p (selected-window)))
3583 ;; This is a special buffer's frame
3584 (iconify-frame (selected-frame))
3585 (or (window-dedicated-p (selected-window))
3587 (select-window owindow))
3588 (choose-completion-string completion buffer base-size)))
3590 ;; Delete the longest partial match for STRING
3591 ;; that can be found before POINT.
3592 (defun choose-completion-delete-max-match (string)
3593 (let ((opoint (point))
3594 (len (min (length string)
3595 (- (point) (point-min)))))
3596 (goto-char (- (point) (length string)))
3597 (if completion-ignore-case
3598 (setq string (downcase string)))
3599 (while (and (> len 0)
3600 (let ((tail (buffer-substring (point)
3602 (if completion-ignore-case
3603 (setq tail (downcase tail)))
3604 (not (string= tail (substring string 0 len)))))
3609 ;; Switch to BUFFER and insert the completion choice CHOICE.
3610 ;; BASE-SIZE, if non-nil, says how many characters of BUFFER's text
3611 ;; to keep. If it is nil, use choose-completion-delete-max-match instead.
3613 ;; If BUFFER is the minibuffer, exit the minibuffer
3614 ;; unless it is reading a file name and CHOICE is a directory,
3615 ;; or completion-no-auto-exit is non-nil.
3616 (defun choose-completion-string (choice &optional buffer base-size)
3617 (let ((buffer (or buffer completion-reference-buffer))
3618 (mini-p (string-match "\\` \\*Minibuf-[0-9]+\\*\\'" (buffer-name buffer))))
3619 ;; If BUFFER is a minibuffer, barf unless it's the currently
3620 ;; active minibuffer.
3622 (or (not (active-minibuffer-window))
3624 (window-buffer (active-minibuffer-window))))))
3625 (error "Minibuffer is not active for completion")
3626 ;; Insert the completion into the buffer where completion was requested.
3629 (delete-region (+ base-size (if mini-p
3630 (minibuffer-prompt-end)
3633 (choose-completion-delete-max-match choice))
3635 (remove-text-properties (- (point) (length choice)) (point)
3637 ;; Update point in the window that BUFFER is showing in.
3638 (let ((window (get-buffer-window buffer t)))
3639 (set-window-point window (point)))
3640 ;; If completing for the minibuffer, exit it with this choice.
3641 (and (not completion-no-auto-exit)
3642 (equal buffer (window-buffer (minibuffer-window)))
3643 minibuffer-completion-table
3644 ;; If this is reading a file name, and the file name chosen
3645 ;; is a directory, don't exit the minibuffer.
3646 (if (and (eq minibuffer-completion-table 'read-file-name-internal)
3647 (file-directory-p (field-string (point-max))))
3648 (select-window (active-minibuffer-window))
3649 (exit-minibuffer))))))
3651 (defun completion-list-mode ()
3652 "Major mode for buffers showing lists of possible completions.
3653 Type \\<completion-list-mode-map>\\[choose-completion] in the completion list\
3654 to select the completion near point.
3655 Use \\<completion-list-mode-map>\\[mouse-choose-completion] to select one\
3658 (kill-all-local-variables)
3659 (use-local-map completion-list-mode-map)
3660 (setq mode-name "Completion List")
3661 (setq major-mode 'completion-list-mode)
3662 (make-local-variable 'completion-base-size)
3663 (setq completion-base-size nil)
3664 (run-hooks 'completion-list-mode-hook))
3666 (defvar completion-setup-hook nil
3667 "Normal hook run at the end of setting up a completion list buffer.
3668 When this hook is run, the current buffer is the one in which the
3669 command to display the completion list buffer was run.
3670 The completion list buffer is available as the value of `standard-output'.")
3672 ;; This function goes in completion-setup-hook, so that it is called
3673 ;; after the text of the completion list buffer is written.
3675 (defun completion-setup-function ()
3677 (let ((mainbuf (current-buffer)))
3678 (set-buffer standard-output)
3679 (completion-list-mode)
3680 (make-local-variable 'completion-reference-buffer)
3681 (setq completion-reference-buffer mainbuf)
3682 (if (eq minibuffer-completion-table 'read-file-name-internal)
3683 ;; For file name completion,
3684 ;; use the number of chars before the start of the
3685 ;; last file name component.
3686 (setq completion-base-size
3688 (set-buffer mainbuf)
3689 (goto-char (point-max))
3690 (skip-chars-backward (format "^%c" directory-sep-char))
3691 (- (point) (minibuffer-prompt-end))))
3692 ;; Otherwise, in minibuffer, the whole input is being completed.
3694 (if (string-match "\\` \\*Minibuf-[0-9]+\\*\\'"
3695 (buffer-name mainbuf))
3696 (setq completion-base-size 0))))
3697 (goto-char (point-min))
3698 (if (display-mouse-p)
3699 (insert (substitute-command-keys
3700 "Click \\[mouse-choose-completion] on a completion to select it.\n")))
3701 (insert (substitute-command-keys
3702 "In this buffer, type \\[choose-completion] to \
3703 select the completion near point.\n\n")))))
3705 (add-hook 'completion-setup-hook 'completion-setup-function)
3707 (define-key minibuffer-local-completion-map [prior]
3708 'switch-to-completions)
3709 (define-key minibuffer-local-must-match-map [prior]
3710 'switch-to-completions)
3711 (define-key minibuffer-local-completion-map "\M-v"
3712 'switch-to-completions)
3713 (define-key minibuffer-local-must-match-map "\M-v"
3714 'switch-to-completions)
3716 (defun switch-to-completions ()
3717 "Select the completion list window."
3719 ;; Make sure we have a completions window.
3720 (or (get-buffer-window "*Completions*")
3721 (minibuffer-completion-help))
3722 (let ((window (get-buffer-window "*Completions*")))
3724 (select-window window)
3725 (goto-char (point-min))
3726 (search-forward "\n\n")
3729 ;; Support keyboard commands to turn on various modifiers.
3731 ;; These functions -- which are not commands -- each add one modifier
3732 ;; to the following event.
3734 (defun event-apply-alt-modifier (ignore-prompt)
3735 "Add the Alt modifier to the following event.
3736 For example, type \\[event-apply-alt-modifier] & to enter Alt-&."
3737 (vector (event-apply-modifier (read-event) 'alt 22 "A-")))
3738 (defun event-apply-super-modifier (ignore-prompt)
3739 "Add the Super modifier to the following event.
3740 For example, type \\[event-apply-super-modifier] & to enter Super-&."
3741 (vector (event-apply-modifier (read-event) 'super 23 "s-")))
3742 (defun event-apply-hyper-modifier (ignore-prompt)
3743 "Add the Hyper modifier to the following event.
3744 For example, type \\[event-apply-hyper-modifier] & to enter Hyper-&."
3745 (vector (event-apply-modifier (read-event) 'hyper 24 "H-")))
3746 (defun event-apply-shift-modifier (ignore-prompt)
3747 "Add the Shift modifier to the following event.
3748 For example, type \\[event-apply-shift-modifier] & to enter Shift-&."
3749 (vector (event-apply-modifier (read-event) 'shift 25 "S-")))
3750 (defun event-apply-control-modifier (ignore-prompt)
3751 "Add the Ctrl modifier to the following event.
3752 For example, type \\[event-apply-control-modifier] & to enter Ctrl-&."
3753 (vector (event-apply-modifier (read-event) 'control 26 "C-")))
3754 (defun event-apply-meta-modifier (ignore-prompt)
3755 "Add the Meta modifier to the following event.
3756 For example, type \\[event-apply-meta-modifier] & to enter Meta-&."
3757 (vector (event-apply-modifier (read-event) 'meta 27 "M-")))
3759 (defun event-apply-modifier (event symbol lshiftby prefix)
3760 "Apply a modifier flag to event EVENT.
3761 SYMBOL is the name of this modifier, as a symbol.
3762 LSHIFTBY is the numeric value of this modifier, in keyboard events.
3763 PREFIX is the string that represents this modifier in an event type symbol."
3765 (cond ((eq symbol 'control)
3766 (if (and (<= (downcase event) ?z)
3767 (>= (downcase event) ?a))
3768 (- (downcase event) ?a -1)
3769 (if (and (<= (downcase event) ?Z)
3770 (>= (downcase event) ?A))
3771 (- (downcase event) ?A -1)
3772 (logior (lsh 1 lshiftby) event))))
3774 (if (and (<= (downcase event) ?z)
3775 (>= (downcase event) ?a))
3777 (logior (lsh 1 lshiftby) event)))
3779 (logior (lsh 1 lshiftby) event)))
3780 (if (memq symbol (event-modifiers event))
3782 (let ((event-type (if (symbolp event) event (car event))))
3783 (setq event-type (intern (concat prefix (symbol-name event-type))))
3786 (cons event-type (cdr event)))))))
3788 (define-key function-key-map [?\C-x ?@ ?h] 'event-apply-hyper-modifier)
3789 (define-key function-key-map [?\C-x ?@ ?s] 'event-apply-super-modifier)
3790 (define-key function-key-map [?\C-x ?@ ?m] 'event-apply-meta-modifier)
3791 (define-key function-key-map [?\C-x ?@ ?a] 'event-apply-alt-modifier)
3792 (define-key function-key-map [?\C-x ?@ ?S] 'event-apply-shift-modifier)
3793 (define-key function-key-map [?\C-x ?@ ?c] 'event-apply-control-modifier)
3795 ;;;; Keypad support.
3797 ;;; Make the keypad keys act like ordinary typing keys. If people add
3798 ;;; bindings for the function key symbols, then those bindings will
3799 ;;; override these, so this shouldn't interfere with any existing
3802 ;; Also tell read-char how to handle these keys.
3804 (lambda (keypad-normal)
3805 (let ((keypad (nth 0 keypad-normal))
3806 (normal (nth 1 keypad-normal)))
3807 (put keypad 'ascii-character normal)
3808 (define-key function-key-map (vector keypad) (vector normal))))
3809 '((kp-0 ?0) (kp-1 ?1) (kp-2 ?2) (kp-3 ?3) (kp-4 ?4)
3810 (kp-5 ?5) (kp-6 ?6) (kp-7 ?7) (kp-8 ?8) (kp-9 ?9)
3823 ;;;; forking a twin copy of a buffer.
3826 (defvar clone-buffer-hook nil
3827 "Normal hook to run in the new buffer at the end of `clone-buffer'.")
3829 (defun clone-process (process &optional newname)
3830 "Create a twin copy of PROCESS.
3831 If NEWNAME is nil, it defaults to PROCESS' name;
3832 NEWNAME is modified by adding or incrementing <N> at the end as necessary.
3833 If PROCESS is associated with a buffer, the new process will be associated
3834 with the current buffer instead.
3835 Returns nil if PROCESS has already terminated."
3836 (setq newname (or newname (process-name process)))
3837 (if (string-match "<[0-9]+>\\'" newname)
3838 (setq newname (substring newname 0 (match-beginning 0))))
3839 (when (memq (process-status process) '(run stop open))
3840 (let* ((process-connection-type (process-tty-name process))
3841 (old-kwoq (process-kill-without-query process nil))
3843 (if (memq (process-status process) '(open))
3844 (apply 'open-network-stream newname
3845 (if (process-buffer process) (current-buffer))
3846 (process-contact process))
3847 (apply 'start-process newname
3848 (if (process-buffer process) (current-buffer))
3849 (process-command process)))))
3850 (process-kill-without-query new-process old-kwoq)
3851 (process-kill-without-query process old-kwoq)
3852 (set-process-inherit-coding-system-flag
3853 new-process (process-inherit-coding-system-flag process))
3854 (set-process-filter new-process (process-filter process))
3855 (set-process-sentinel new-process (process-sentinel process))
3858 ;; things to maybe add (currently partly covered by `funcall mode':
3861 (defun clone-buffer (&optional newname display-flag)
3862 "Create a twin copy of the current buffer.
3863 If NEWNAME is nil, it defaults to the current buffer's name;
3864 NEWNAME is modified by adding or incrementing <N> at the end as necessary.
3866 If DISPLAY-FLAG is non-nil, the new buffer is shown with `pop-to-buffer'.
3867 This runs the normal hook `clone-buffer-hook' in the new buffer
3868 after it has been set up properly in other respects."
3869 (interactive (list (if current-prefix-arg (read-string "Name: "))
3871 (if buffer-file-name
3872 (error "Cannot clone a file-visiting buffer"))
3873 (if (get major-mode 'no-clone)
3874 (error "Cannot clone a buffer in %s mode" mode-name))
3875 (setq newname (or newname (buffer-name)))
3876 (if (string-match "<[0-9]+>\\'" newname)
3877 (setq newname (substring newname 0 (match-beginning 0))))
3878 (let ((buf (current-buffer))
3882 (mk (if mark-active (mark t)))
3883 (modified (buffer-modified-p))
3885 (lvars (buffer-local-variables))
3886 (process (get-buffer-process (current-buffer)))
3887 (new (generate-new-buffer (or newname (buffer-name)))))
3890 (with-current-buffer new
3891 (insert-buffer-substring buf)))
3892 (with-current-buffer new
3893 (narrow-to-region ptmin ptmax)
3895 (if mk (set-mark mk))
3896 (set-buffer-modified-p modified)
3898 ;; Clone the old buffer's process, if any.
3899 (when process (clone-process process))
3901 ;; Now set up the major mode.
3904 ;; Set up other local variables.
3906 (condition-case () ;in case var is read-only
3909 (set (make-local-variable (car v)) (cdr v)))
3913 ;; Run any hooks (typically set up by the major mode
3914 ;; for cloning to work properly).
3915 (run-hooks 'clone-buffer-hook))
3916 (if display-flag (pop-to-buffer new))
3920 (defun clone-indirect-buffer (newname display-flag &optional norecord)
3921 "Create an indirect buffer that is a twin copy of the current buffer.
3923 Give the indirect buffer name NEWNAME. Interactively, read NEW-NAME
3924 from the minibuffer when invoked with a prefix arg. If NEWNAME is nil
3925 or if not called with a prefix arg, NEWNAME defaults to the current
3926 buffer's name. The name is modified by adding a `<N>' suffix to it
3927 or by incrementing the N in an existing suffix.
3929 DISPLAY-FLAG non-nil means show the new buffer with `pop-to-buffer'.
3930 This is always done when called interactively.
3932 Optional last arg NORECORD non-nil means do not put this buffer at the
3933 front of the list of recently selected ones."
3934 (interactive (list (if current-prefix-arg
3935 (read-string "BName of indirect buffer: "))
3937 (setq newname (or newname (buffer-name)))
3938 (if (string-match "<[0-9]+>\\'" newname)
3939 (setq newname (substring newname 0 (match-beginning 0))))
3940 (let* ((name (generate-new-buffer-name newname))
3941 (buffer (make-indirect-buffer (current-buffer) name t)))
3943 (pop-to-buffer buffer norecord))
3947 (defun clone-indirect-buffer-other-window (buffer &optional norecord)
3948 "Create an indirect buffer that is a twin copy of BUFFER.
3949 Select the new buffer in another window.
3950 Optional second arg NORECORD non-nil means do not put this buffer at
3951 the front of the list of recently selected ones."
3952 (interactive "bClone buffer in other window: ")
3953 (let ((popup-windows t))
3955 (clone-indirect-buffer nil t norecord)))
3957 (define-key ctl-x-4-map "c" 'clone-indirect-buffer-other-window)
3962 (defconst syntax-code-table
3963 '((?\ 0 "whitespace")
3965 (?. 1 "punctuation")
3968 (?\( 4 "open parenthesis")
3969 (?\) 5 "close parenthesis")
3970 (?\' 6 "expression prefix")
3971 (?\" 7 "string quote")
3972 (?$ 8 "paired delimiter")
3974 (?/ 10 "character quote")
3975 (?< 11 "comment start")
3976 (?> 12 "comment end")
3978 (nil 14 "comment fence")
3979 (nil 15 "string fence"))
3980 "Alist of forms (CHAR CODE DESCRIPTION) mapping characters to syntax info.
3981 CHAR is a character that is allowed as first char in the string
3982 specifying the syntax when calling `modify-syntax-entry'. CODE is the
3983 corresponing syntax code as it is stored in a syntax cell, and
3984 can be used as value of a `syntax-table' property.
3985 DESCRIPTION is the descriptive string for the syntax.")
3990 (defun byte-compiling-files-p ()
3991 "Return t if currently byte-compiling files."
3992 (and (boundp 'byte-compile-current-file)
3993 (stringp byte-compile-current-file)))
3995 ;;; simple.el ends here