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.
35 "Killing and yanking commands"
38 (defgroup fill-comments nil
39 "Indenting and filling of comments."
43 (defgroup paren-matching nil
44 "Highlight (un)matching of parens and expressions."
48 (defun fundamental-mode ()
49 "Major mode not specialized for anything in particular.
50 Other major modes are defined by comparison with this one."
52 (kill-all-local-variables))
54 ;; Making and deleting lines.
56 (defun newline (&optional arg
)
57 "Insert a newline, and move to left margin of the new line if it's blank.
58 The newline is marked with the text-property `hard'.
59 With arg, insert that many newlines.
60 In Auto Fill mode, if no numeric arg, break the preceding line if it's long."
62 (barf-if-buffer-read-only)
63 ;; Inserting a newline at the end of a line produces better redisplay in
64 ;; try_window_id than inserting at the beginning of a line, and the textual
65 ;; result is the same. So, if we're at beginning of line, pretend to be at
66 ;; the end of the previous line.
67 (let ((flag (and (not (bobp))
69 ;; Make sure no functions want to be told about
70 ;; the range of the changes.
71 (not after-change-function
)
72 (not before-change-function
)
73 (not after-change-functions
)
74 (not before-change-functions
)
75 ;; Make sure there are no markers here.
76 (not (buffer-has-markers-at (1- (point))))
77 (not (buffer-has-markers-at (point)))
78 ;; Make sure no text properties want to know
79 ;; where the change was.
80 (not (get-char-property (1- (point)) 'modification-hooks
))
81 (not (get-char-property (1- (point)) 'insert-behind-hooks
))
83 (not (get-char-property (point) 'insert-in-front-hooks
)))
84 ;; Make sure the newline before point isn't intangible.
85 (not (get-char-property (1- (point)) 'intangible
))
86 ;; Make sure the newline before point isn't read-only.
87 (not (get-char-property (1- (point)) 'read-only
))
88 ;; Make sure the newline before point isn't invisible.
89 (not (get-char-property (1- (point)) 'invisible
))
90 ;; Make sure the newline before point has the same
91 ;; properties as the char before it (if any).
92 (< (or (previous-property-change (point)) -
2)
94 (was-page-start (and (bolp)
95 (looking-at page-delimiter
)))
97 (if flag
(backward-char 1))
98 ;; Call self-insert so that auto-fill, abbrev expansion etc. happens.
99 ;; Set last-command-char to tell self-insert what to insert.
100 (let ((last-command-char ?
\n)
101 ;; Don't auto-fill if we have a numeric argument.
102 ;; Also not if flag is true (it would fill wrong line);
103 ;; there is no need to since we're at BOL.
104 (auto-fill-function (if (or arg flag
) nil auto-fill-function
)))
106 (self-insert-command (prefix-numeric-value arg
))
107 ;; If we get an error in self-insert-command, put point at right place.
108 (if flag
(forward-char 1))))
109 ;; Even if we did *not* get an error, keep that forward-char;
110 ;; all further processing should apply to the newline that the user
111 ;; thinks he inserted.
113 ;; Mark the newline(s) `hard'.
114 (if use-hard-newlines
115 (set-hard-newline-properties
116 (- (point) (if arg
(prefix-numeric-value arg
) 1)) (point)))
117 ;; If the newline leaves the previous line blank,
118 ;; and we have a left margin, delete that from the blank line.
121 (goto-char beforepos
)
123 (and (looking-at "[ \t]$")
124 (> (current-left-margin) 0)
125 (delete-region (point) (progn (end-of-line) (point))))))
126 ;; Indent the line after the newline, except in one case:
127 ;; when we added the newline at the beginning of a line
128 ;; which starts a page.
130 (move-to-left-margin nil t
)))
133 (defun set-hard-newline-properties (from to
)
134 (let ((sticky (get-text-property from
'rear-nonsticky
)))
135 (put-text-property from to
'hard
't
)
136 ;; If rear-nonsticky is not "t", add 'hard to rear-nonsticky list
137 (if (and (listp sticky
) (not (memq 'hard sticky
)))
138 (put-text-property from
(point) 'rear-nonsticky
139 (cons 'hard sticky
)))))
141 (defun open-line (arg)
142 "Insert a newline and leave point before it.
143 If there is a fill prefix and/or a left-margin, insert them on the new line
144 if the line would have been blank.
145 With arg N, insert N newlines."
147 (let* ((do-fill-prefix (and fill-prefix
(bolp)))
148 (do-left-margin (and (bolp) (> (current-left-margin) 0)))
154 (if do-left-margin
(indent-to (current-left-margin)))
155 (if do-fill-prefix
(insert-and-inherit fill-prefix
))))
162 "Split current line, moving portion beyond point vertically down."
164 (skip-chars-forward " \t")
165 (let ((col (current-column))
171 (defun delete-indentation (&optional arg
)
172 "Join this line to previous and fix up whitespace at join.
173 If there is a fill prefix, delete it from the beginning of this line.
174 With argument, join this line to following line."
177 (if arg
(forward-line 1))
178 (if (eq (preceding-char) ?
\n)
180 (delete-region (point) (1- (point)))
181 ;; If the second line started with the fill prefix,
182 ;; delete the prefix.
184 (<= (+ (point) (length fill-prefix
)) (point-max))
186 (buffer-substring (point)
187 (+ (point) (length fill-prefix
)))))
188 (delete-region (point) (+ (point) (length fill-prefix
))))
189 (fixup-whitespace))))
191 (defalias 'join-line
#'delete-indentation
) ; easier to find
193 (defun delete-blank-lines ()
194 "On blank line, delete all surrounding blank lines, leaving just one.
195 On isolated blank line, delete that one.
196 On nonblank line, delete any immediately following blank lines."
198 (let (thisblank singleblank
)
201 (setq thisblank
(looking-at "[ \t]*$"))
202 ;; Set singleblank if there is just one blank line here.
205 (not (looking-at "[ \t]*\n[ \t]*$"))
207 (progn (forward-line -
1)
208 (not (looking-at "[ \t]*$")))))))
209 ;; Delete preceding blank lines, and this one too if it's the only one.
213 (if singleblank
(forward-line 1))
214 (delete-region (point)
215 (if (re-search-backward "[^ \t\n]" nil t
)
216 (progn (forward-line 1) (point))
218 ;; Delete following blank lines, unless the current line is blank
219 ;; and there are no following blank lines.
220 (if (not (and thisblank singleblank
))
224 (delete-region (point)
225 (if (re-search-forward "[^ \t\n]" nil t
)
226 (progn (beginning-of-line) (point))
228 ;; Handle the special case where point is followed by newline and eob.
229 ;; Delete the line, leaving point at eob.
230 (if (looking-at "^[ \t]*\n\\'")
231 (delete-region (point) (point-max)))))
233 (defun newline-and-indent ()
234 "Insert a newline, then indent according to major mode.
235 Indentation is done using the value of `indent-line-function'.
236 In programming language modes, this is the same as TAB.
237 In some text modes, where TAB inserts a tab, this command indents to the
238 column specified by the function `current-left-margin'."
240 (delete-region (point) (progn (skip-chars-backward " \t") (point)))
242 (indent-according-to-mode))
244 (defun reindent-then-newline-and-indent ()
245 "Reindent current line, insert newline, then indent the new line.
246 Indentation of both lines is done according to the current major mode,
247 which means calling the current value of `indent-line-function'.
248 In programming language modes, this is the same as TAB.
249 In some text modes, where TAB inserts a tab, this indents to the
250 column specified by the function `current-left-margin'."
253 (delete-region (point) (progn (skip-chars-backward " \t") (point)))
254 (indent-according-to-mode))
256 (indent-according-to-mode))
258 (defun quoted-insert (arg)
259 "Read next input character and insert it.
260 This is useful for inserting control characters.
262 If the first character you type after this command is an octal digit,
263 you should type a sequence of octal digits which specify a character code.
264 Any nondigit terminates the sequence. If the terminator is a RET,
265 it is discarded; any other terminator is used itself as input.
266 The variable `read-quoted-char-radix' specifies the radix for this feature;
267 set it to 10 or 16 to use decimal or hex instead of octal.
269 In overwrite mode, this function inserts the character anyway, and
270 does not handle octal digits specially. This means that if you use
271 overwrite as your normal editing mode, you can use this function to
272 insert characters when necessary.
274 In binary overwrite mode, this function does overwrite, and octal
275 digits are interpreted as a character code. This is intended to be
276 useful for editing binary files."
278 (let ((char (if (or (not overwrite-mode
)
279 (eq overwrite-mode
'overwrite-mode-binary
))
282 ;; Assume character codes 0240 - 0377 stand for characters in some
283 ;; single-byte character set, and convert them to Emacs
285 (if (and enable-multibyte-characters
288 (setq char
(unibyte-char-to-multibyte char
)))
290 (if (eq overwrite-mode
'overwrite-mode-binary
)
293 (insert-and-inherit char
)
294 (setq arg
(1- arg
)))))
296 (defun forward-to-indentation (arg)
297 "Move forward ARG lines and position at first nonblank character."
300 (skip-chars-forward " \t"))
302 (defun backward-to-indentation (arg)
303 "Move backward ARG lines and position at first nonblank character."
305 (forward-line (- arg
))
306 (skip-chars-forward " \t"))
308 (defun back-to-indentation ()
309 "Move point to the first non-whitespace character on this line."
311 (beginning-of-line 1)
312 (skip-chars-forward " \t"))
314 (defun fixup-whitespace ()
315 "Fixup white space between objects around point.
316 Leave one space or none, according to the context."
319 (delete-horizontal-space)
320 (if (or (looking-at "^\\|\\s)")
321 (save-excursion (forward-char -
1)
322 (looking-at "$\\|\\s(\\|\\s'")))
326 (defun delete-horizontal-space ()
327 "Delete all spaces and tabs around point."
329 (skip-chars-backward " \t")
330 (delete-region (point) (progn (skip-chars-forward " \t") (point))))
332 (defun just-one-space ()
333 "Delete all spaces and tabs around point, leaving one space."
335 (skip-chars-backward " \t")
336 (if (= (following-char) ?
)
339 (delete-region (point) (progn (skip-chars-forward " \t") (point))))
342 (defun beginning-of-buffer (&optional arg
)
343 "Move point to the beginning of the buffer; leave mark at previous position.
344 With arg N, put point N/10 of the way from the beginning.
346 If the buffer is narrowed, this command uses the beginning and size
347 of the accessible part of the buffer.
349 Don't use this command in Lisp programs!
350 \(goto-char (point-min)) is faster and avoids clobbering the mark."
353 (let ((size (- (point-max) (point-min))))
357 ;; Avoid overflow for large buffer sizes!
358 (* (prefix-numeric-value arg
)
360 (/ (+ 10 (* size
(prefix-numeric-value arg
))) 10)))
362 (if arg
(forward-line 1)))
364 (defun end-of-buffer (&optional arg
)
365 "Move point to the end of the buffer; leave mark at previous position.
366 With arg N, put point N/10 of the way from the end.
368 If the buffer is narrowed, this command uses the beginning and size
369 of the accessible part of the buffer.
371 Don't use this command in Lisp programs!
372 \(goto-char (point-max)) is faster and avoids clobbering the mark."
375 (let ((size (- (point-max) (point-min))))
379 ;; Avoid overflow for large buffer sizes!
380 (* (prefix-numeric-value arg
)
382 (/ (* size
(prefix-numeric-value arg
)) 10)))
384 ;; If we went to a place in the middle of the buffer,
385 ;; adjust it to the beginning of a line.
386 (cond (arg (forward-line 1))
387 ((< (point) (window-end nil t
))
388 ;; If the end of the buffer is not already on the screen,
389 ;; then scroll specially to put it near, but not at, the bottom.
390 (overlay-recenter (point))
393 (defun mark-whole-buffer ()
394 "Put point at beginning and mark at end of buffer.
395 You probably should not use this function in Lisp programs;
396 it is usually a mistake for a Lisp function to use any subroutine
397 that uses or sets the mark."
400 (push-mark (point-max) nil t
)
401 (goto-char (point-min)))
404 ;; Counting lines, one way or another.
406 (defun goto-line (arg)
407 "Goto line ARG, counting from line 1 at beginning of buffer."
408 (interactive "NGoto line: ")
409 (setq arg
(prefix-numeric-value arg
))
413 (if (eq selective-display t
)
414 (re-search-forward "[\n\C-m]" nil
'end
(1- arg
))
415 (forward-line (1- arg
)))))
417 (defun count-lines-region (start end
)
418 "Print number of lines and characters in the region."
420 (message "Region has %d lines, %d characters"
421 (count-lines start end
) (- end start
)))
424 "Print the current buffer line number and narrowed line number of point."
426 (let ((opoint (point)) start
)
429 (goto-char (point-min))
436 (message "line %d (narrowed line %d)"
437 (1+ (count-lines 1 (point)))
438 (1+ (count-lines start
(point))))
439 (message "Line %d" (1+ (count-lines 1 (point)))))))))
441 (defun count-lines (start end
)
442 "Return number of lines between START and END.
443 This is usually the number of newlines between them,
444 but can be one more if START is not equal to END
445 and the greater of them is not at the start of a line."
448 (narrow-to-region start end
)
449 (goto-char (point-min))
450 (if (eq selective-display t
)
453 (while (re-search-forward "[\n\C-m]" nil t
40)
454 (setq done
(+ 40 done
)))
455 (while (re-search-forward "[\n\C-m]" nil t
1)
456 (setq done
(+ 1 done
)))
457 (goto-char (point-max))
458 (if (and (/= start end
)
462 (- (buffer-size) (forward-line (buffer-size)))))))
464 (defun what-cursor-position (&optional detail
)
465 "Print info on cursor position (on screen and within buffer).
466 Also describe the character after point, and give its character code
467 in octal, decimal and hex.
469 For a non-ASCII multibyte character, also give its encoding in the
470 buffer's selected coding system if the coding system encodes the
471 character safely. If the character is encoded into one byte, that
472 code is shown in hex. If the character is encoded into more than one
473 byte, just \"...\" is shown.
475 With prefix argument, print additional details about that character,
476 instead of the cursor position. This includes the character set name,
477 the codes that identify the character within that character set. In
478 addition, the encoding is fully shown."
480 (let* ((char (following-char))
484 (total (buffer-size))
485 (percent (if (> total
50000)
486 ;; Avoid overflow from multiplying by 100!
487 (/ (+ (/ total
200) (1- pos
)) (max (/ total
100) 1))
488 (/ (+ (/ total
2) (* 100 (1- pos
))) (max total
1))))
489 (hscroll (if (= (window-hscroll) 0)
491 (format " Hscroll=%d" (window-hscroll))))
492 (col (current-column)))
494 (if (or (/= beg
1) (/= end
(1+ total
)))
495 (message "point=%d of %d (%d%%) <%d - %d> column %d %s"
496 pos total percent beg end col hscroll
)
497 (message "point=%d of %d (%d%%) column %d %s"
498 pos total percent col hscroll
))
499 (let ((coding buffer-file-coding-system
)
500 encoded encoding-msg
)
502 (eq (coding-system-type coding
) t
))
503 (setq coding default-buffer-file-coding-system
))
504 (if (not (char-valid-p char
))
506 (format "(0%o, %d, 0x%x, invalid)" char char char
))
507 (setq encoded
(and (>= char
128) (encode-coding-char char coding
)))
510 (format "(0%o, %d, 0x%x, ext %s)"
512 (if (and (not detail
)
513 (> (length encoded
) 1))
516 (encoded-string-description encoded coding
)
517 (if (nth 2 (find-composition (point)))
519 (format "(0%o, %d, 0x%x)" char char char
))))
521 ;; We show the detailed information of CHAR.
522 (message "Char: %s %s %s"
524 (single-key-description char
)
525 (buffer-substring-no-properties (point) (1+ (point))))
526 encoding-msg
(split-char char
))
527 (if (or (/= beg
1) (/= end
(1+ total
)))
528 (message "Char: %s %s point=%d of %d (%d%%) <%d - %d> column %d %s"
530 (single-key-description char
)
531 (buffer-substring-no-properties (point) (1+ (point))))
532 encoding-msg pos total percent beg end col hscroll
)
533 (message "Char: %s %s point=%d of %d (%d%%) column %d %s"
535 (single-key-description char
)
536 (buffer-substring-no-properties (point) (1+ (point))))
537 encoding-msg pos total percent col hscroll
)))))))
539 (defvar read-expression-map
(cons 'keymap minibuffer-local-map
)
540 "Minibuffer keymap used for reading Lisp expressions.")
541 (define-key read-expression-map
"\M-\t" 'lisp-complete-symbol
)
543 (defvar read-expression-history nil
)
545 (defcustom eval-expression-print-level
4
546 "*Value to use for `print-level' when printing value in `eval-expression'."
551 (defcustom eval-expression-print-length
12
552 "*Value to use for `print-length' when printing value in `eval-expression'."
557 (defcustom eval-expression-debug-on-error t
558 "*Non-nil means set `debug-on-error' when evaluating in `eval-expression'.
559 If nil, don't change the value of `debug-on-error'."
564 ;; We define this, rather than making `eval' interactive,
565 ;; for the sake of completion of names like eval-region, eval-current-buffer.
566 (defun eval-expression (eval-expression-arg
567 &optional eval-expression-insert-value
)
568 "Evaluate EXPRESSION and print value in minibuffer.
569 Value is also consed on to front of the variable `values'."
571 (list (read-from-minibuffer "Eval: "
572 nil read-expression-map t
573 'read-expression-history
)
576 (if (null eval-expression-debug-on-error
)
577 (setq values
(cons (eval eval-expression-arg
) values
))
578 (let ((old-value (make-symbol "t")) new-value
)
579 ;; Bind debug-on-error to something unique so that we can
580 ;; detect when evaled code changes it.
581 (let ((debug-on-error old-value
))
582 (setq values
(cons (eval eval-expression-arg
) values
))
583 (setq new-value debug-on-error
))
584 ;; If evaled code has changed the value of debug-on-error,
585 ;; propagate that change to the global binding.
586 (unless (eq old-value new-value
)
587 (setq debug-on-error new-value
))))
589 (let ((print-length eval-expression-print-length
)
590 (print-level eval-expression-print-level
))
592 (if eval-expression-insert-value
(current-buffer) t
))))
594 (defun edit-and-eval-command (prompt command
)
595 "Prompting with PROMPT, let user edit COMMAND and eval result.
596 COMMAND is a Lisp expression. Let user edit that expression in
597 the minibuffer, then read and evaluate the result."
598 (let ((command (read-from-minibuffer prompt
599 (prin1-to-string command
)
600 read-expression-map t
601 '(command-history .
1))))
602 ;; If command was added to command-history as a string,
603 ;; get rid of that. We want only evaluable expressions there.
604 (if (stringp (car command-history
))
605 (setq command-history
(cdr command-history
)))
607 ;; If command to be redone does not match front of history,
608 ;; add it to the history.
609 (or (equal command
(car command-history
))
610 (setq command-history
(cons command command-history
)))
613 (defun repeat-complex-command (arg)
614 "Edit and re-evaluate last complex command, or ARGth from last.
615 A complex command is one which used the minibuffer.
616 The command is placed in the minibuffer as a Lisp form for editing.
617 The result is executed, repeating the command as changed.
618 If the command has been changed or is not the most recent previous command
619 it is added to the front of the command history.
620 You can use the minibuffer history commands \\<minibuffer-local-map>\\[next-history-element] and \\[previous-history-element]
621 to get different commands to edit and resubmit."
623 (let ((elt (nth (1- arg
) command-history
))
628 (let ((print-level nil
)
629 (minibuffer-history-position arg
)
630 (minibuffer-history-sexp-flag (1+ (minibuffer-depth))))
631 (read-from-minibuffer
632 "Redo: " (prin1-to-string elt
) read-expression-map t
633 (cons 'command-history arg
))))
635 ;; If command was added to command-history as a string,
636 ;; get rid of that. We want only evaluable expressions there.
637 (if (stringp (car command-history
))
638 (setq command-history
(cdr command-history
)))
640 ;; If command to be redone does not match front of history,
641 ;; add it to the history.
642 (or (equal newcmd
(car command-history
))
643 (setq command-history
(cons newcmd command-history
)))
647 (defvar minibuffer-history nil
648 "Default minibuffer history list.
649 This is used for all minibuffer input
650 except when an alternate history list is specified.")
651 (defvar minibuffer-history-sexp-flag nil
652 "Non-nil when doing history operations on `command-history'.
653 More generally, indicates that the history list being acted on
654 contains expressions rather than strings.
655 It is only valid if its value equals the current minibuffer depth,
656 to handle recursive uses of the minibuffer.")
657 (setq minibuffer-history-variable
'minibuffer-history
)
658 (setq minibuffer-history-position nil
)
659 (defvar minibuffer-history-search-history nil
)
662 (lambda (key-and-command)
664 (lambda (keymap-and-completionp)
665 ;; Arg is (KEYMAP-SYMBOL . COMPLETION-MAP-P).
666 ;; If the cdr of KEY-AND-COMMAND (the command) is a cons,
667 ;; its car is used if COMPLETION-MAP-P is nil, its cdr if it is t.
668 (define-key (symbol-value (car keymap-and-completionp
))
669 (car key-and-command
)
670 (let ((command (cdr key-and-command
)))
672 ;; (and ... nil) => ... turns back on the completion-oriented
673 ;; history commands which rms turned off since they seem to
674 ;; do things he doesn't like.
675 (if (and (cdr keymap-and-completionp
) nil
) ;XXX turned off
676 (progn (error "EMACS BUG!") (cdr command
))
679 '((minibuffer-local-map . nil
)
680 (minibuffer-local-ns-map . nil
)
681 (minibuffer-local-completion-map . t
)
682 (minibuffer-local-must-match-map . t
)
683 (read-expression-map . nil
))))
684 '(("\en" .
(next-history-element . next-complete-history-element
))
685 ([next] . (next-history-element . next-complete-history-element))
686 ("\ep" . (previous-history-element . previous-complete-history-element))
687 ([prior] . (previous-history-element . previous-complete-history-element))
688 ("\er" . previous-matching-history-element)
689 ("\es" . next-matching-history-element)))
691 (defvar minibuffer-text-before-history nil
692 "Text that was in this minibuffer before any history commands.
693 This is nil if there have not yet been any history commands
694 in this use of the minibuffer.")
696 (add-hook 'minibuffer-setup-hook 'minibuffer-history-initialize)
698 (defun minibuffer-history-initialize ()
699 (setq minibuffer-text-before-history nil))
701 (defcustom minibuffer-history-case-insensitive-variables nil
702 "*Minibuffer history variables for which matching should ignore case.
703 If a history variable is a member of this list, then the
704 \\[previous-matching-history-element] and \\[next-matching-history-element]\
705 commands ignore case when searching it, regardless of `case-fold-search'."
706 :type '(repeat variable)
709 (defun previous-matching-history-element (regexp n)
710 "Find the previous history element that matches REGEXP.
711 \(Previous history elements refer to earlier actions.)
712 With prefix argument N, search for Nth previous match.
713 If N is negative, find the next or Nth next match.
714 An uppercase letter in REGEXP makes the search case-sensitive.
715 See also `minibuffer-history-case-insensitive-variables'."
717 (let* ((enable-recursive-minibuffers t)
718 (regexp (read-from-minibuffer "Previous element matching (regexp): "
722 'minibuffer-history-search-history)))
723 ;; Use the last regexp specified, by default, if input is empty.
724 (list (if (string= regexp "")
725 (if minibuffer-history-search-history
726 (car minibuffer-history-search-history)
727 (error "No previous history search regexp"))
729 (prefix-numeric-value current-prefix-arg))))
730 (if (and (zerop minibuffer-history-position)
731 (null minibuffer-text-before-history))
732 (setq minibuffer-text-before-history (field-string (point-max))))
733 (let ((history (symbol-value minibuffer-history-variable))
735 (if (isearch-no-upper-case-p regexp t) ; assume isearch.el is dumped
736 ;; On some systems, ignore case for file names.
737 (if (memq minibuffer-history-variable
738 minibuffer-history-case-insensitive-variables)
740 ;; Respect the user's setting for case-fold-search:
744 (pos minibuffer-history-position))
747 (setq pos (min (max 1 (+ pos (if (< n 0) -1 1))) (length history)))
750 "No later matching history item"
751 "No earlier matching history item")))
752 (if (string-match regexp
753 (if (eq minibuffer-history-sexp-flag
755 (let ((print-level nil))
756 (prin1-to-string (nth (1- pos) history)))
757 (nth (1- pos) history)))
758 (setq n (+ n (if (< n 0) 1 -1)))))
759 (setq minibuffer-history-position pos)
760 (goto-char (point-max))
762 (let ((elt (nth (1- pos) history)))
763 (insert (if (eq minibuffer-history-sexp-flag (minibuffer-depth))
764 (let ((print-level nil))
765 (prin1-to-string elt))
767 (goto-char (field-beginning)))
768 (if (or (eq (car (car command-history)) 'previous-matching-history-element)
769 (eq (car (car command-history)) 'next-matching-history-element))
770 (setq command-history (cdr command-history))))
772 (defun next-matching-history-element (regexp n)
773 "Find the next history element that matches REGEXP.
774 \(The next history element refers to a more recent action.)
775 With prefix argument N, search for Nth next match.
776 If N is negative, find the previous or Nth previous match.
777 An uppercase letter in REGEXP makes the search case-sensitive."
779 (let* ((enable-recursive-minibuffers t)
780 (regexp (read-from-minibuffer "Next element matching (regexp): "
784 'minibuffer-history-search-history)))
785 ;; Use the last regexp specified, by default, if input is empty.
786 (list (if (string= regexp "")
787 (setcar minibuffer-history-search-history
788 (nth 1 minibuffer-history-search-history))
790 (prefix-numeric-value current-prefix-arg))))
791 (previous-matching-history-element regexp (- n)))
793 (defun next-history-element (n)
794 "Insert the next element of the minibuffer history into the minibuffer."
797 (let ((narg (- minibuffer-history-position n))
798 (minimum (if minibuffer-default -1 0))
799 elt minibuffer-returned-to-present)
800 (if (and (zerop minibuffer-history-position)
801 (null minibuffer-text-before-history))
802 (setq minibuffer-text-before-history (field-string (point-max))))
804 (if minibuffer-default
805 (error "End of history; no next item")
806 (error "End of history; no default available")))
807 (if (> narg (length (symbol-value minibuffer-history-variable)))
808 (error "Beginning of history; no preceding item"))
809 (goto-char (point-max))
811 (setq minibuffer-history-position narg)
813 (setq elt minibuffer-default))
815 (setq elt (or minibuffer-text-before-history ""))
816 (setq minibuffer-returned-to-present t)
817 (setq minibuffer-text-before-history nil))
818 (t (setq elt (nth (1- minibuffer-history-position)
819 (symbol-value minibuffer-history-variable)))))
821 (if (and (eq minibuffer-history-sexp-flag (minibuffer-depth))
822 (not minibuffer-returned-to-present))
823 (let ((print-level nil))
824 (prin1-to-string elt))
826 (goto-char (field-beginning)))))
828 (defun previous-history-element (n)
829 "Inserts the previous element of the minibuffer history into the minibuffer."
831 (next-history-element (- n)))
833 (defun next-complete-history-element (n)
834 "Get next history element which completes the minibuffer before the point.
835 The contents of the minibuffer after the point are deleted, and replaced
836 by the new completion."
838 (let ((point-at-start (point)))
839 (next-matching-history-element
841 "^" (regexp-quote (buffer-substring (field-beginning) (point))))
843 ;; next-matching-history-element always puts us at (point-min).
844 ;; Move to the position we were at before changing the buffer contents.
845 ;; This is still sensical, because the text before point has not changed.
846 (goto-char point-at-start)))
848 (defun previous-complete-history-element (n)
850 Get previous history element which completes the minibuffer before the point.
851 The contents of the minibuffer after the point are deleted, and replaced
852 by the new completion."
854 (next-complete-history-element (- n)))
856 ;; These two functions are for compatibility with the old subrs of the
859 (defun minibuffer-prompt-width ()
860 "Return the display width of the minibuffer prompt.
861 Return 0 if current buffer is not a mini-buffer."
862 ;; Return the width of everything before the field at the end of
863 ;; the buffer; this should be 0 for normal buffers.
864 (1- (field-beginning (point-max))))
866 (defun minibuffer-prompt-end ()
867 "Return the buffer position of the end of the minibuffer prompt.
868 Return 0 if current buffer is not a mini-buffer."
869 (field-beginning (point-max)))
872 ;Put this on C-x u, so we can force that rather than C-_ into startup msg
873 (defalias 'advertised-undo 'undo)
875 (defun undo (&optional arg)
876 "Undo some previous changes.
877 Repeat this command to undo more changes.
878 A numeric argument serves as a repeat count.
880 Just C-u as argument requests selective undo,
881 limited to changes within the current region.
882 Likewise in Transient Mark mode when the mark is active."
884 ;; If we don't get all the way thru, make last-command indicate that
885 ;; for the following command.
886 (setq this-command t)
887 (let ((modified (buffer-modified-p))
888 (recent-save (recent-auto-save-p)))
889 (or (eq (selected-window) (minibuffer-window))
891 (or (eq last-command 'undo)
892 (progn (if (or arg (and transient-mark-mode mark-active))
893 (undo-start (region-beginning) (region-end))
896 (undo-more (if arg (prefix-numeric-value arg) 1))
897 ;; Don't specify a position in the undo record for the undo command.
898 ;; Instead, undoing this should move point to where the change is.
899 (let ((tail buffer-undo-list)
901 (while (and tail (not done) (not (null (car tail))))
902 (if (integerp (car tail))
905 (setq buffer-undo-list (delq (car tail) buffer-undo-list))))
906 (setq tail (cdr tail))))
907 (and modified (not (buffer-modified-p))
908 (delete-auto-save-file-if-necessary recent-save)))
909 ;; If we do get all the way thru, make this-command indicate that.
910 (setq this-command 'undo))
912 (defvar pending-undo-list nil
913 "Within a run of consecutive undo commands, list remaining to be undone.")
915 (defvar undo-in-progress nil
916 "Non-nil while performing an undo.
917 Some change-hooks test this variable to do something different.")
919 (defun undo-more (count)
920 "Undo back N undo-boundaries beyond what was already undone recently.
921 Call `undo-start' to get ready to undo recent changes,
922 then call `undo-more' one or more times to undo them."
923 (or pending-undo-list
924 (error "No further undo information"))
925 (let ((undo-in-progress t))
926 (setq pending-undo-list (primitive-undo count pending-undo-list))))
928 ;; Deep copy of a list
929 (defun undo-copy-list (list)
930 "Make a copy of undo list LIST."
931 (mapcar 'undo-copy-list-1 list))
933 (defun undo-copy-list-1 (elt)
935 (cons (car elt) (undo-copy-list-1 (cdr elt)))
938 (defun undo-start (&optional beg end)
939 "Set `pending-undo-list' to the front of the undo list.
940 The next call to `undo-more' will undo the most recently made change.
941 If BEG and END are specified, then only undo elements
942 that apply to text between BEG and END are used; other undo elements
943 are ignored. If BEG and END are nil, all undo elements are used."
944 (if (eq buffer-undo-list t)
945 (error "No undo information in this buffer"))
946 (setq pending-undo-list
947 (if (and beg end (not (= beg end)))
948 (undo-make-selective-list (min beg end) (max beg end))
951 (defvar undo-adjusted-markers)
953 (defun undo-make-selective-list (start end)
954 "Return a list of undo elements for the region START to END.
955 The elements come from `buffer-undo-list', but we keep only
956 the elements inside this region, and discard those outside this region.
957 If we find an element that crosses an edge of this region,
958 we stop and ignore all further elements."
959 (let ((undo-list-copy (undo-copy-list buffer-undo-list))
960 (undo-list (list nil))
961 undo-adjusted-markers
963 undo-elt undo-elt temp-undo-list delta)
964 (while undo-list-copy
965 (setq undo-elt (car undo-list-copy))
967 (cond ((and (consp undo-elt) (eq (car undo-elt) t))
968 ;; This is a "was unmodified" element.
969 ;; Keep it if we have kept everything thus far.
972 (undo-elt-in-region undo-elt start end)))))
975 (setq end (+ end (cdr (undo-delta undo-elt))))
976 ;; Don't put two nils together in the list
977 (if (not (and (eq (car undo-list) nil)
979 (setq undo-list (cons undo-elt undo-list))))
980 (if (undo-elt-crosses-region undo-elt start end)
981 (setq undo-list-copy nil)
982 (setq some-rejected t)
983 (setq temp-undo-list (cdr undo-list-copy))
984 (setq delta (undo-delta undo-elt))
986 (when (/= (cdr delta) 0)
987 (let ((position (car delta))
988 (offset (cdr delta)))
990 ;; Loop down the earlier events adjusting their buffer positions
991 ;; to reflect the fact that a change to the buffer isn't being
992 ;; undone. We only need to process those element types which
993 ;; undo-elt-in-region will return as being in the region since
994 ;; only those types can ever get into the output
996 (while temp-undo-list
997 (setq undo-elt (car temp-undo-list))
998 (cond ((integerp undo-elt)
999 (if (>= undo-elt position)
1000 (setcar temp-undo-list (- undo-elt offset))))
1001 ((atom undo-elt) nil)
1002 ((stringp (car undo-elt))
1003 ;; (TEXT . POSITION)
1004 (let ((text-pos (abs (cdr undo-elt)))
1005 (point-at-end (< (cdr undo-elt) 0 )))
1006 (if (>= text-pos position)
1007 (setcdr undo-elt (* (if point-at-end -1 1)
1008 (- text-pos offset))))))
1009 ((integerp (car undo-elt))
1011 (when (>= (car undo-elt) position)
1012 (setcar undo-elt (- (car undo-elt) offset))
1013 (setcdr undo-elt (- (cdr undo-elt) offset))))
1014 ((null (car undo-elt))
1015 ;; (nil PROPERTY VALUE BEG . END)
1016 (let ((tail (nthcdr 3 undo-elt)))
1017 (when (>= (car tail) position)
1018 (setcar tail (- (car tail) offset))
1019 (setcdr tail (- (cdr tail) offset))))))
1020 (setq temp-undo-list (cdr temp-undo-list))))))))
1021 (setq undo-list-copy (cdr undo-list-copy)))
1022 (nreverse undo-list)))
1024 (defun undo-elt-in-region (undo-elt start end)
1025 "Determine whether UNDO-ELT falls inside the region START ... END.
1026 If it crosses the edge, we return nil."
1027 (cond ((integerp undo-elt)
1028 (and (>= undo-elt start)
1034 ((stringp (car undo-elt))
1035 ;; (TEXT . POSITION)
1036 (and (>= (abs (cdr undo-elt)) start)
1037 (< (abs (cdr undo-elt)) end)))
1038 ((and (consp undo-elt) (markerp (car undo-elt)))
1039 ;; This is a marker-adjustment element (MARKER . ADJUSTMENT).
1040 ;; See if MARKER is inside the region.
1041 (let ((alist-elt (assq (car undo-elt) undo-adjusted-markers)))
1043 (setq alist-elt (cons (car undo-elt)
1044 (marker-position (car undo-elt))))
1045 (setq undo-adjusted-markers
1046 (cons alist-elt undo-adjusted-markers)))
1047 (and (cdr alist-elt)
1048 (>= (cdr alist-elt) start)
1049 (< (cdr alist-elt) end))))
1050 ((null (car undo-elt))
1051 ;; (nil PROPERTY VALUE BEG . END)
1052 (let ((tail (nthcdr 3 undo-elt)))
1053 (and (>= (car tail) start)
1054 (< (cdr tail) end))))
1055 ((integerp (car undo-elt))
1057 (and (>= (car undo-elt) start)
1058 (< (cdr undo-elt) end)))))
1060 (defun undo-elt-crosses-region (undo-elt start end)
1061 "Test whether UNDO-ELT crosses one edge of that region START ... END.
1062 This assumes we have already decided that UNDO-ELT
1063 is not *inside* the region START...END."
1064 (cond ((atom undo-elt) nil)
1065 ((null (car undo-elt))
1066 ;; (nil PROPERTY VALUE BEG . END)
1067 (let ((tail (nthcdr 3 undo-elt)))
1068 (not (or (< (car tail) end)
1069 (> (cdr tail) start)))))
1070 ((integerp (car undo-elt))
1072 (not (or (< (car undo-elt) end)
1073 (> (cdr undo-elt) start))))))
1075 ;; Return the first affected buffer position and the delta for an undo element
1076 ;; delta is defined as the change in subsequent buffer positions if we *did*
1078 (defun undo-delta (undo-elt)
1079 (if (consp undo-elt)
1080 (cond ((stringp (car undo-elt))
1081 ;; (TEXT . POSITION)
1082 (cons (abs (cdr undo-elt)) (length (car undo-elt))))
1083 ((integerp (car undo-elt))
1085 (cons (car undo-elt) (- (car undo-elt) (cdr undo-elt))))
1090 (defvar shell-command-history nil
1091 "History list for some commands that read shell commands.")
1093 (defvar shell-command-switch "-c"
1094 "Switch used to have the shell execute its command line argument.")
1096 (defvar shell-command-default-error-buffer nil
1097 "*Buffer name for `shell-command' and `shell-command-on-region' error output.
1098 This buffer is used when `shell-command' or 'shell-command-on-region'
1099 is run interactively. A value of nil means that output to stderr and
1100 stdout will be intermixed in the output stream.")
1102 (defun shell-command (command &optional output-buffer error-buffer)
1103 "Execute string COMMAND in inferior shell; display output, if any.
1105 If COMMAND ends in ampersand, execute it asynchronously.
1106 The output appears in the buffer `*Async Shell Command*'.
1107 That buffer is in shell mode.
1109 Otherwise, COMMAND is executed synchronously. The output appears in the
1110 buffer `*Shell Command Output*'.
1111 If the output is one line, it is displayed in the echo area *as well*,
1112 but it is nonetheless available in buffer `*Shell Command Output*',
1113 even though that buffer is not automatically displayed.
1114 If there is no output, or if output is inserted in the current buffer,
1115 then `*Shell Command Output*' is deleted.
1117 To specify a coding system for converting non-ASCII characters
1118 in the shell command output, use \\[universal-coding-system-argument]
1119 before this command.
1121 Noninteractive callers can specify coding systems by binding
1122 `coding-system-for-read' and `coding-system-for-write'.
1124 The optional second argument OUTPUT-BUFFER, if non-nil,
1125 says to put the output in some other buffer.
1126 If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
1127 If OUTPUT-BUFFER is not a buffer and not nil,
1128 insert output in current buffer. (This cannot be done asynchronously.)
1129 In either case, the output is inserted after point (leaving mark after it).
1131 If the optional third argument ERROR-BUFFER is non-nil, it is a buffer
1132 or buffer name to which to direct the command's standard error output.
1133 If it is nil, error output is mingled with regular output.
1134 In an interactive call, the variable `shell-command-default-error-buffer'
1135 specifies the value of ERROR-BUFFER."
1137 (interactive (list (read-from-minibuffer "Shell command: "
1138 nil nil nil 'shell-command-history)
1140 shell-command-default-error-buffer))
1141 ;; Look for a handler in case default-directory is a remote file name.
1143 (find-file-name-handler (directory-file-name default-directory)
1146 (funcall handler 'shell-command command output-buffer error-buffer)
1147 (if (and output-buffer
1148 (not (or (bufferp output-buffer) (stringp output-buffer))))
1152 (expand-file-name "scor"
1153 (or small-temporary-file-directory
1154 temporary-file-directory)))
1156 (barf-if-buffer-read-only)
1158 ;; We do not use -f for csh; we will not support broken use of
1159 ;; .cshrcs. Even the BSD csh manual says to use
1160 ;; "if ($?prompt) exit" before things which are not useful
1161 ;; non-interactively. Besides, if someone wants their other
1162 ;; aliases for shell commands then they can still have them.
1163 (call-process shell-file-name nil
1167 nil shell-command-switch command)
1168 (when (and error-file (file-exists-p error-file))
1169 (if (< 0 (nth 7 (file-attributes error-file)))
1170 (with-current-buffer (get-buffer-create error-buffer)
1171 (let ((pos-from-end (- (point-max) (point))))
1174 ;; Do no formatting while reading error file,
1175 ;; because that can run a shell command, and we
1176 ;; don't want that to cause an infinite recursion.
1177 (format-insert-file error-file nil)
1178 ;; Put point after the inserted errors.
1179 (goto-char (- (point-max) pos-from-end)))
1180 (display-buffer (current-buffer))))
1181 (delete-file error-file))
1182 ;; This is like exchange-point-and-mark, but doesn't
1183 ;; activate the mark. It is cleaner to avoid activation,
1184 ;; even though the command loop would deactivate the mark
1185 ;; because we inserted text.
1186 (goto-char (prog1 (mark t)
1187 (set-marker (mark-marker) (point)
1188 (current-buffer)))))
1189 ;; Preserve the match data in case called from a program.
1191 (if (string-match "[ \t]*&[ \t]*$" command)
1192 ;; Command ending with ampersand means asynchronous.
1193 (let ((buffer (get-buffer-create
1194 (or output-buffer "*Async Shell Command*")))
1195 (directory default-directory)
1197 ;; Remove the ampersand.
1198 (setq command (substring command 0 (match-beginning 0)))
1199 ;; If will kill a process, query first.
1200 (setq proc (get-buffer-process buffer))
1202 (if (yes-or-no-p "A command is running. Kill it? ")
1204 (error "Shell command in progress")))
1207 (setq buffer-read-only nil)
1209 (display-buffer buffer)
1210 (setq default-directory directory)
1211 (setq proc (start-process "Shell" buffer shell-file-name
1212 shell-command-switch command))
1213 (setq mode-line-process '(":%s"))
1214 (require 'shell) (shell-mode)
1215 (set-process-sentinel proc 'shell-command-sentinel)
1217 (shell-command-on-region (point) (point) command
1218 output-buffer nil error-buffer)))))))
1220 ;; We have a sentinel to prevent insertion of a termination message
1221 ;; in the buffer itself.
1222 (defun shell-command-sentinel (process signal)
1223 (if (memq (process-status process) '(exit signal))
1225 (car (cdr (cdr (process-command process))))
1226 (substring signal 0 -1))))
1228 (defun shell-command-on-region (start end command
1229 &optional output-buffer replace
1231 "Execute string COMMAND in inferior shell with region as input.
1232 Normally display output (if any) in temp buffer `*Shell Command Output*';
1233 Prefix arg means replace the region with it. Return the exit code of
1236 To specify a coding system for converting non-ASCII characters
1237 in the input and output to the shell command, use \\[universal-coding-system-argument]
1238 before this command. By default, the input (from the current buffer)
1239 is encoded in the same coding system that will be used to save the file,
1240 `buffer-file-coding-system'. If the output is going to replace the region,
1241 then it is decoded from that same coding system.
1243 The noninteractive arguments are START, END, COMMAND, OUTPUT-BUFFER,
1244 REPLACE, ERROR-BUFFER. Noninteractive callers can specify coding
1245 systems by binding `coding-system-for-read' and
1246 `coding-system-for-write'.
1248 If the output is one line, it is displayed in the echo area,
1249 but it is nonetheless available in buffer `*Shell Command Output*'
1250 even though that buffer is not automatically displayed.
1251 If there is no output, or if output is inserted in the current buffer,
1252 then `*Shell Command Output*' is deleted.
1254 If the optional fourth argument OUTPUT-BUFFER is non-nil,
1255 that says to put the output in some other buffer.
1256 If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
1257 If OUTPUT-BUFFER is not a buffer and not nil,
1258 insert output in the current buffer.
1259 In either case, the output is inserted after point (leaving mark after it).
1261 If REPLACE, the optional fifth argument, is non-nil, that means insert
1262 the output in place of text from START to END, putting point and mark
1265 If optional sixth argument ERROR-BUFFER is non-nil, it is a buffer
1266 or buffer name to which to direct the command's standard error output.
1267 If it is nil, error output is mingled with regular output.
1268 In an interactive call, the variable `shell-command-default-error-buffer'
1269 specifies the value of ERROR-BUFFER."
1270 (interactive (let ((string
1271 ;; Do this before calling region-beginning
1272 ;; and region-end, in case subprocess output
1273 ;; relocates them while we are in the minibuffer.
1274 (read-from-minibuffer "Shell command on region: "
1276 'shell-command-history)))
1277 ;; call-interactively recognizes region-beginning and
1278 ;; region-end specially, leaving them in the history.
1279 (list (region-beginning) (region-end)
1283 shell-command-default-error-buffer)))
1287 (expand-file-name "scor"
1288 (or small-temporary-file-directory
1289 temporary-file-directory)))
1294 (not (or (bufferp output-buffer) (stringp output-buffer)))))
1295 ;; Replace specified region with output from command.
1296 (let ((swap (and replace (< start end))))
1297 ;; Don't muck with mark unless REPLACE says we should.
1299 (and replace (push-mark))
1301 (call-process-region start end shell-file-name t
1305 nil shell-command-switch command))
1306 (let ((shell-buffer (get-buffer "*Shell Command Output*")))
1307 (and shell-buffer (not (eq shell-buffer (current-buffer)))
1308 (kill-buffer shell-buffer)))
1309 ;; Don't muck with mark unless REPLACE says we should.
1310 (and replace swap (exchange-point-and-mark)))
1311 ;; No prefix argument: put the output in a temp buffer,
1312 ;; replacing its entire contents.
1313 (let ((buffer (get-buffer-create
1314 (or output-buffer "*Shell Command Output*")))
1317 (if (eq buffer (current-buffer))
1318 ;; If the input is the same buffer as the output,
1319 ;; delete everything but the specified region,
1320 ;; then replace that region with the output.
1321 (progn (setq buffer-read-only nil)
1322 (delete-region (max start end) (point-max))
1323 (delete-region (point-min) (min start end))
1325 (call-process-region (point-min) (point-max)
1330 nil shell-command-switch
1332 ;; Clear the output buffer, then run the command with
1334 (let ((directory default-directory))
1337 (setq buffer-read-only nil)
1338 (if (not output-buffer)
1339 (setq default-directory directory))
1342 (call-process-region start end shell-file-name nil
1344 (list buffer error-file)
1346 nil shell-command-switch command)))
1347 (setq success (and exit-status (equal 0 exit-status)))
1348 ;; Report the amount of output.
1349 (let ((lines (save-excursion
1351 (if (= (buffer-size) 0)
1353 (count-lines (point-min) (point-max))))))
1356 (< 0 (nth 7 (file-attributes error-file))))
1357 (message "(Shell command %sed with some error output)"
1358 (if (equal 0 exit-status)
1361 (message "(Shell command %sed with no output)"
1362 (if (equal 0 exit-status)
1365 (kill-buffer buffer))
1370 (goto-char (point-min))
1371 (buffer-substring (point)
1372 (progn (end-of-line) (point))))))
1376 (goto-char (point-min)))
1377 (display-buffer buffer)))))))
1378 (when (and error-file (file-exists-p error-file))
1379 (if (< 0 (nth 7 (file-attributes error-file)))
1380 (with-current-buffer (get-buffer-create error-buffer)
1381 (let ((pos-from-end (- (point-max) (point))))
1384 ;; Do no formatting while reading error file,
1385 ;; because that can run a shell command, and we
1386 ;; don't want that to cause an infinite recursion.
1387 (format-insert-file error-file nil)
1388 ;; Put point after the inserted errors.
1389 (goto-char (- (point-max) pos-from-end)))
1390 (display-buffer (current-buffer))))
1391 (delete-file error-file))
1394 (defun shell-command-to-string (command)
1395 "Execute shell command COMMAND and return its output as a string."
1396 (with-output-to-string
1397 (with-current-buffer
1399 (call-process shell-file-name nil t nil shell-command-switch command))))
1401 (defvar universal-argument-map
1402 (let ((map (make-sparse-keymap)))
1403 (define-key map [t] 'universal-argument-other-key)
1404 (define-key map (vector meta-prefix-char t) 'universal-argument-other-key)
1405 (define-key map [switch-frame] nil)
1406 (define-key map [?\C-u] 'universal-argument-more)
1407 (define-key map [?-] 'universal-argument-minus)
1408 (define-key map [?0] 'digit-argument)
1409 (define-key map [?1] 'digit-argument)
1410 (define-key map [?2] 'digit-argument)
1411 (define-key map [?3] 'digit-argument)
1412 (define-key map [?4] 'digit-argument)
1413 (define-key map [?5] 'digit-argument)
1414 (define-key map [?6] 'digit-argument)
1415 (define-key map [?7] 'digit-argument)
1416 (define-key map [?8] 'digit-argument)
1417 (define-key map [?9] 'digit-argument)
1419 "Keymap used while processing \\[universal-argument].")
1421 (defvar universal-argument-num-events nil
1422 "Number of argument-specifying events read by `universal-argument'.
1423 `universal-argument-other-key' uses this to discard those events
1424 from (this-command-keys), and reread only the final command.")
1426 (defun universal-argument ()
1427 "Begin a numeric argument for the following command.
1428 Digits or minus sign following \\[universal-argument] make up the numeric argument.
1429 \\[universal-argument] following the digits or minus sign ends the argument.
1430 \\[universal-argument] without digits or minus sign provides 4 as argument.
1431 Repeating \\[universal-argument] without digits or minus sign
1432 multiplies the argument by 4 each time.
1433 For some commands, just \\[universal-argument] by itself serves as a flag
1434 which is different in effect from any particular numeric argument.
1435 These commands include \\[set-mark-command] and \\[start-kbd-macro]."
1437 (setq prefix-arg (list 4))
1438 (setq universal-argument-num-events (length (this-command-keys)))
1439 (setq overriding-terminal-local-map universal-argument-map))
1441 ;; A subsequent C-u means to multiply the factor by 4 if we've typed
1442 ;; nothing but C-u's; otherwise it means to terminate the prefix arg.
1443 (defun universal-argument-more (arg)
1446 (setq prefix-arg (list (* 4 (car arg))))
1448 (setq prefix-arg (list -4))
1449 (setq prefix-arg arg)
1450 (setq overriding-terminal-local-map nil)))
1451 (setq universal-argument-num-events (length (this-command-keys))))
1453 (defun negative-argument (arg)
1454 "Begin a negative numeric argument for the next command.
1455 \\[universal-argument] following digits or minus sign ends the argument."
1457 (cond ((integerp arg)
1458 (setq prefix-arg (- arg)))
1460 (setq prefix-arg nil))
1462 (setq prefix-arg '-)))
1463 (setq universal-argument-num-events (length (this-command-keys)))
1464 (setq overriding-terminal-local-map universal-argument-map))
1466 (defun digit-argument (arg)
1467 "Part of the numeric argument for the next command.
1468 \\[universal-argument] following digits or minus sign ends the argument."
1470 (let ((digit (- (logand last-command-char ?\177) ?0)))
1471 (cond ((integerp arg)
1472 (setq prefix-arg (+ (* arg 10)
1473 (if (< arg 0) (- digit) digit))))
1475 ;; Treat -0 as just -, so that -01 will work.
1476 (setq prefix-arg (if (zerop digit) '- (- digit))))
1478 (setq prefix-arg digit))))
1479 (setq universal-argument-num-events (length (this-command-keys)))
1480 (setq overriding-terminal-local-map universal-argument-map))
1482 ;; For backward compatibility, minus with no modifiers is an ordinary
1483 ;; command if digits have already been entered.
1484 (defun universal-argument-minus (arg)
1487 (universal-argument-other-key arg)
1488 (negative-argument arg)))
1490 ;; Anything else terminates the argument and is left in the queue to be
1491 ;; executed as a command.
1492 (defun universal-argument-other-key (arg)
1494 (setq prefix-arg arg)
1495 (let* ((key (this-command-keys))
1496 (keylist (listify-key-sequence key)))
1497 (setq unread-command-events
1498 (append (nthcdr universal-argument-num-events keylist)
1499 unread-command-events)))
1500 (reset-this-command-lengths)
1501 (setq overriding-terminal-local-map nil))
1503 ;;;; Window system cut and paste hooks.
1505 (defvar interprogram-cut-function nil
1506 "Function to call to make a killed region available to other programs.
1508 Most window systems provide some sort of facility for cutting and
1509 pasting text between the windows of different programs.
1510 This variable holds a function that Emacs calls whenever text
1511 is put in the kill ring, to make the new kill available to other
1514 The function takes one or two arguments.
1515 The first argument, TEXT, is a string containing
1516 the text which should be made available.
1517 The second, PUSH, if non-nil means this is a \"new\" kill;
1518 nil means appending to an \"old\" kill.")
1520 (defvar interprogram-paste-function nil
1521 "Function to call to get text cut from other programs.
1523 Most window systems provide some sort of facility for cutting and
1524 pasting text between the windows of different programs.
1525 This variable holds a function that Emacs calls to obtain
1526 text that other programs have provided for pasting.
1528 The function should be called with no arguments. If the function
1529 returns nil, then no other program has provided such text, and the top
1530 of the Emacs kill ring should be used. If the function returns a
1531 string, that string should be put in the kill ring as the latest kill.
1533 Note that the function should return a string only if a program other
1534 than Emacs has provided a string for pasting; if Emacs provided the
1535 most recent string, the function should return nil. If it is
1536 difficult to tell whether Emacs or some other program provided the
1537 current string, it is probably good enough to return nil if the string
1538 is equal (according to `string=') to the last text Emacs provided.")
1542 ;;;; The kill ring data structure.
1544 (defvar kill-ring nil
1545 "List of killed text sequences.
1546 Since the kill ring is supposed to interact nicely with cut-and-paste
1547 facilities offered by window systems, use of this variable should
1548 interact nicely with `interprogram-cut-function' and
1549 `interprogram-paste-function'. The functions `kill-new',
1550 `kill-append', and `current-kill' are supposed to implement this
1551 interaction; you may want to use them instead of manipulating the kill
1554 (defcustom kill-ring-max 60
1555 "*Maximum length of kill ring before oldest elements are thrown away."
1559 (defvar kill-ring-yank-pointer nil
1560 "The tail of the kill ring whose car is the last thing yanked.")
1562 (defun kill-new (string &optional replace)
1563 "Make STRING the latest kill in the kill ring.
1564 Set the kill-ring-yank pointer to point to it.
1565 If `interprogram-cut-function' is non-nil, apply it to STRING.
1566 Optional second argument REPLACE non-nil means that STRING will replace
1567 the front of the kill ring, rather than being added to the list."
1568 (and (fboundp 'menu-bar-update-yank-menu)
1569 (menu-bar-update-yank-menu string (and replace (car kill-ring))))
1571 (setcar kill-ring string)
1572 (setq kill-ring (cons string kill-ring))
1573 (if (> (length kill-ring) kill-ring-max)
1574 (setcdr (nthcdr (1- kill-ring-max) kill-ring) nil)))
1575 (setq kill-ring-yank-pointer kill-ring)
1576 (if interprogram-cut-function
1577 (funcall interprogram-cut-function string (not replace))))
1579 (defun kill-append (string before-p)
1580 "Append STRING to the end of the latest kill in the kill ring.
1581 If BEFORE-P is non-nil, prepend STRING to the kill.
1582 If `interprogram-cut-function' is set, pass the resulting kill to
1584 (kill-new (if before-p
1585 (concat string (car kill-ring))
1586 (concat (car kill-ring) string)) t))
1588 (defun current-kill (n &optional do-not-move)
1589 "Rotate the yanking point by N places, and then return that kill.
1590 If N is zero, `interprogram-paste-function' is set, and calling it
1591 returns a string, then that string is added to the front of the
1592 kill ring and returned as the latest kill.
1593 If optional arg DO-NOT-MOVE is non-nil, then don't actually move the
1594 yanking point; just return the Nth kill forward."
1595 (let ((interprogram-paste (and (= n 0)
1596 interprogram-paste-function
1597 (funcall interprogram-paste-function))))
1598 (if interprogram-paste
1600 ;; Disable the interprogram cut function when we add the new
1601 ;; text to the kill ring, so Emacs doesn't try to own the
1602 ;; selection, with identical text.
1603 (let ((interprogram-cut-function nil))
1604 (kill-new interprogram-paste))
1606 (or kill-ring (error "Kill ring is empty"))
1607 (let ((ARGth-kill-element
1608 (nthcdr (mod (- n (length kill-ring-yank-pointer))
1612 (setq kill-ring-yank-pointer ARGth-kill-element))
1613 (car ARGth-kill-element)))))
1617 ;;;; Commands for manipulating the kill ring.
1619 (defcustom kill-read-only-ok nil
1620 "*Non-nil means don't signal an error for killing read-only text."
1624 (put 'text-read-only 'error-conditions
1625 '(text-read-only buffer-read-only error))
1626 (put 'text-read-only 'error-message "Text is read-only")
1628 (defun kill-region (beg end)
1629 "Kill between point and mark.
1630 The text is deleted but saved in the kill ring.
1631 The command \\[yank] can retrieve it from there.
1632 \(If you want to kill and then yank immediately, use \\[copy-region-as-kill].)
1633 If the buffer is read-only, Emacs will beep and refrain from deleting
1634 the text, but put the text in the kill ring anyway. This means that
1635 you can use the killing commands to copy text from a read-only buffer.
1637 This is the primitive for programs to kill text (as opposed to deleting it).
1638 Supply two arguments, character numbers indicating the stretch of text
1640 Any command that calls this function is a \"kill command\".
1641 If the previous command was also a kill command,
1642 the text killed this time appends to the text killed last time
1643 to make one entry in the kill ring."
1646 (let ((string (delete-and-extract-region beg end)))
1647 (when string ;STRING is nil if BEG = END
1648 ;; Add that string to the kill ring, one way or another.
1649 (if (eq last-command 'kill-region)
1650 (kill-append string (< end beg))
1652 (setq this-command 'kill-region))
1653 ((buffer-read-only text-read-only)
1654 ;; The code above failed because the buffer, or some of the characters
1655 ;; in the region, are read-only.
1656 ;; We should beep, in case the user just isn't aware of this.
1657 ;; However, there's no harm in putting
1658 ;; the region's text in the kill ring, anyway.
1659 (copy-region-as-kill beg end)
1660 ;; Set this-command now, so it will be set even if we get an error.
1661 (setq this-command 'kill-region)
1662 ;; This should barf, if appropriate, and give us the correct error.
1663 (if kill-read-only-ok
1664 (message "Read only text copied to kill ring")
1665 ;; Signal an error if the buffer is read-only.
1666 (barf-if-buffer-read-only)
1667 ;; If the buffer isn't read-only, the text is.
1668 (signal 'text-read-only (list (current-buffer)))))))
1670 ;; copy-region-as-kill no longer sets this-command, because it's confusing
1671 ;; to get two copies of the text when the user accidentally types M-w and
1672 ;; then corrects it with the intended C-w.
1673 (defun copy-region-as-kill (beg end)
1674 "Save the region as if killed, but don't kill it.
1675 In Transient Mark mode, deactivate the mark.
1676 If `interprogram-cut-function' is non-nil, also save the text for a window
1677 system cut and paste."
1679 (if (eq last-command 'kill-region)
1680 (kill-append (buffer-substring beg end) (< end beg))
1681 (kill-new (buffer-substring beg end)))
1682 (if transient-mark-mode
1683 (setq deactivate-mark t))
1686 (defun kill-ring-save (beg end)
1687 "Save the region as if killed, but don't kill it.
1688 In Transient Mark mode, deactivate the mark.
1689 If `interprogram-cut-function' is non-nil, also save the text for a window
1690 system cut and paste.
1692 This command is similar to `copy-region-as-kill', except that it gives
1693 visual feedback indicating the extent of the region being copied."
1695 (copy-region-as-kill beg end)
1697 (let ((other-end (if (= (point) beg) end beg))
1699 ;; Inhibit quitting so we can make a quit here
1700 ;; look like a C-g typed as a command.
1702 (if (pos-visible-in-window-p other-end (selected-window))
1704 ;; Swap point and mark.
1705 (set-marker (mark-marker) (point) (current-buffer))
1706 (goto-char other-end)
1709 (set-marker (mark-marker) other-end (current-buffer))
1711 ;; If user quit, deactivate the mark
1712 ;; as C-g would as a command.
1713 (and quit-flag mark-active
1715 (let* ((killed-text (current-kill 0))
1716 (message-len (min (length killed-text) 40)))
1718 ;; Don't say "killed"; that is misleading.
1719 (message "Saved text until \"%s\""
1720 (substring killed-text (- message-len)))
1721 (message "Saved text from \"%s\""
1722 (substring killed-text 0 message-len))))))))
1724 (defun append-next-kill (&optional interactive)
1725 "Cause following command, if it kills, to append to previous kill.
1726 The argument is used for internal purposes; do not supply one."
1728 ;; We don't use (interactive-p), since that breaks kbd macros.
1731 (setq this-command 'kill-region)
1732 (message "If the next command is a kill, it will append"))
1733 (setq last-command 'kill-region)))
1737 (defun yank-pop (arg)
1738 "Replace just-yanked stretch of killed text with a different stretch.
1739 This command is allowed only immediately after a `yank' or a `yank-pop'.
1740 At such a time, the region contains a stretch of reinserted
1741 previously-killed text. `yank-pop' deletes that text and inserts in its
1742 place a different stretch of killed text.
1744 With no argument, the previous kill is inserted.
1745 With argument N, insert the Nth previous kill.
1746 If N is negative, this is a more recent kill.
1748 The sequence of kills wraps around, so that after the oldest one
1749 comes the newest one."
1751 (if (not (eq last-command 'yank))
1752 (error "Previous command was not a yank"))
1753 (setq this-command 'yank)
1754 (let ((inhibit-read-only t)
1755 (before (< (point) (mark t))))
1756 (delete-region (point) (mark t))
1757 (set-marker (mark-marker) (point) (current-buffer))
1758 (let ((opoint (point)))
1759 (insert (current-kill arg))
1760 (let ((inhibit-read-only t))
1761 (remove-text-properties opoint (point) '(read-only nil))))
1763 ;; This is like exchange-point-and-mark, but doesn't activate the mark.
1764 ;; It is cleaner to avoid activation, even though the command
1765 ;; loop would deactivate the mark because we inserted text.
1766 (goto-char (prog1 (mark t)
1767 (set-marker (mark-marker) (point) (current-buffer))))))
1770 (defun yank (&optional arg)
1771 "Reinsert the last stretch of killed text.
1772 More precisely, reinsert the stretch of killed text most recently
1773 killed OR yanked. Put point at end, and set mark at beginning.
1774 With just C-u as argument, same but put point at beginning (and mark at end).
1775 With argument N, reinsert the Nth most recently killed stretch of killed
1777 See also the command \\[yank-pop]."
1779 ;; If we don't get all the way thru, make last-command indicate that
1780 ;; for the following command.
1781 (setq this-command t)
1783 (let ((opoint (point)))
1784 (insert (current-kill (cond
1788 (let ((inhibit-read-only t))
1789 (remove-text-properties opoint (point) '(read-only nil))))
1791 ;; This is like exchange-point-and-mark, but doesn't activate the mark.
1792 ;; It is cleaner to avoid activation, even though the command
1793 ;; loop would deactivate the mark because we inserted text.
1794 (goto-char (prog1 (mark t)
1795 (set-marker (mark-marker) (point) (current-buffer)))))
1796 ;; If we do get all the way thru, make this-command indicate that.
1797 (setq this-command 'yank)
1800 (defun rotate-yank-pointer (arg)
1801 "Rotate the yanking point in the kill ring.
1802 With argument, rotate that many kills forward (or backward, if negative)."
1806 ;; Some kill commands.
1808 ;; Internal subroutine of delete-char
1809 (defun kill-forward-chars (arg)
1810 (if (listp arg) (setq arg (car arg)))
1811 (if (eq arg '-) (setq arg -1))
1812 (kill-region (point) (forward-point arg)))
1814 ;; Internal subroutine of backward-delete-char
1815 (defun kill-backward-chars (arg)
1816 (if (listp arg) (setq arg (car arg)))
1817 (if (eq arg '-) (setq arg -1))
1818 (kill-region (point) (forward-point (- arg))))
1820 (defcustom backward-delete-char-untabify-method 'untabify
1821 "*The method for untabifying when deleting backward.
1822 Can be `untabify' -- turn a tab to many spaces, then delete one space;
1823 `hungry' -- delete all whitespace, both tabs and spaces;
1824 `all' -- delete all whitespace, including tabs, spaces and newlines;
1825 nil -- just delete one character."
1826 :type '(choice (const untabify) (const hungry) (const all) (const nil))
1829 (defun backward-delete-char-untabify (arg &optional killp)
1830 "Delete characters backward, changing tabs into spaces.
1831 The exact behavior depends on `backward-delete-char-untabify-method'.
1832 Delete ARG chars, and kill (save in kill ring) if KILLP is non-nil.
1833 Interactively, ARG is the prefix arg (default 1)
1834 and KILLP is t if a prefix arg was specified."
1835 (interactive "*p\nP")
1836 (when (eq backward-delete-char-untabify-method 'untabify)
1839 (while (and (> count 0) (not (bobp)))
1840 (if (= (preceding-char) ?\t)
1841 (let ((col (current-column)))
1843 (setq col (- col (current-column)))
1844 (insert-char ?\ col)
1847 (setq count (1- count))))))
1848 (delete-backward-char
1849 (let ((skip (cond ((eq backward-delete-char-untabify-method 'hungry) " \t")
1850 ((eq backward-delete-char-untabify-method 'all)
1853 (let ((wh (- (point) (save-excursion (skip-chars-backward skip)
1855 (+ arg (if (zerop wh) 0 (1- wh))))
1859 (defun zap-to-char (arg char)
1860 "Kill up to and including ARG'th occurrence of CHAR.
1861 Case is ignored if `case-fold-search' is non-nil in the current buffer.
1862 Goes backward if ARG is negative; error if CHAR not found."
1863 (interactive "p\ncZap to char: ")
1864 (kill-region (point) (progn
1865 (search-forward (char-to-string char) nil nil arg)
1866 ; (goto-char (if (> arg 0) (1- (point)) (1+ (point))))
1869 ;; kill-line and its subroutines.
1871 (defcustom kill-whole-line nil
1872 "*If non-nil, `kill-line' with no arg at beg of line kills the whole line."
1876 (defun kill-line (&optional arg)
1877 "Kill the rest of the current line; if no nonblanks there, kill thru newline.
1878 With prefix argument, kill that many lines from point.
1879 Negative arguments kill lines backward.
1881 When calling from a program, nil means \"no arg\",
1882 a number counts as a prefix arg.
1884 To kill a whole line, when point is not at the beginning, type \
1885 \\[beginning-of-line] \\[kill-line] \\[kill-line].
1887 If `kill-whole-line' is non-nil, then this command kills the whole line
1888 including its terminating newline, when used at the beginning of a line
1889 with no argument. As a consequence, you can always kill a whole line
1890 by typing \\[beginning-of-line] \\[kill-line]."
1892 (kill-region (point)
1893 ;; It is better to move point to the other end of the kill
1894 ;; before killing. That way, in a read-only buffer, point
1895 ;; moves across the text that is copied to the kill ring.
1896 ;; The choice has no effect on undo now that undo records
1897 ;; the value of point from before the command was run.
1900 (forward-visible-line (prefix-numeric-value arg))
1902 (signal 'end-of-buffer nil))
1903 (if (or (looking-at "[ \t]*$") (and kill-whole-line (bolp)))
1904 (forward-visible-line 1)
1905 (end-of-visible-line)))
1908 (defun forward-visible-line (arg)
1909 "Move forward by ARG lines, ignoring currently invisible newlines only.
1910 If ARG is negative, move backward -ARG lines.
1911 If ARG is zero, move to the beginning of the current line."
1915 (or (zerop (forward-line 1))
1916 (signal 'end-of-buffer nil))
1917 ;; If the following character is currently invisible,
1918 ;; skip all characters with that same `invisible' property value,
1919 ;; then find the next newline.
1920 (while (and (not (eobp))
1922 (get-char-property (point) 'invisible)))
1923 (if (eq buffer-invisibility-spec t)
1925 (or (memq prop buffer-invisibility-spec)
1926 (assq prop buffer-invisibility-spec)))))
1928 (if (get-text-property (point) 'invisible)
1929 (or (next-single-property-change (point) 'invisible)
1931 (next-overlay-change (point))))
1932 (or (zerop (forward-line 1))
1933 (signal 'end-of-buffer nil)))
1934 (setq arg (1- arg)))
1936 (while (or first (< arg 0))
1939 (or (zerop (forward-line -1))
1940 (signal 'beginning-of-buffer nil)))
1941 (while (and (not (bobp))
1943 (get-char-property (1- (point)) 'invisible)))
1944 (if (eq buffer-invisibility-spec t)
1946 (or (memq prop buffer-invisibility-spec)
1947 (assq prop buffer-invisibility-spec)))))
1949 (if (get-text-property (1- (point)) 'invisible)
1950 (or (previous-single-property-change (point) 'invisible)
1952 (previous-overlay-change (point))))
1953 (or (zerop (forward-line -1))
1954 (signal 'beginning-of-buffer nil)))
1956 (setq arg (1+ arg)))))
1957 ((beginning-of-buffer end-of-buffer)
1960 (defun end-of-visible-line ()
1961 "Move to end of current visible line."
1963 ;; If the following character is currently invisible,
1964 ;; skip all characters with that same `invisible' property value,
1965 ;; then find the next newline.
1966 (while (and (not (eobp))
1968 (get-char-property (point) 'invisible)))
1969 (if (eq buffer-invisibility-spec t)
1971 (or (memq prop buffer-invisibility-spec)
1972 (assq prop buffer-invisibility-spec)))))
1973 (if (get-text-property (point) 'invisible)
1974 (goto-char (next-single-property-change (point) 'invisible))
1975 (goto-char (next-overlay-change (point))))
1978 (defun insert-buffer (buffer)
1979 "Insert after point the contents of BUFFER.
1980 Puts mark after the inserted text.
1981 BUFFER may be a buffer or a buffer name.
1983 This function is meant for the user to run interactively.
1984 Don't call it from programs!"
1988 (barf-if-buffer-read-only)
1989 (read-buffer "Insert buffer: "
1990 (if (eq (selected-window) (next-window (selected-window)))
1991 (other-buffer (current-buffer))
1992 (window-buffer (next-window (selected-window))))
1994 (or (bufferp buffer)
1995 (setq buffer (get-buffer buffer)))
1996 (let (start end newmark)
2000 (setq start (point-min) end (point-max)))
2001 (insert-buffer-substring buffer start end)
2002 (setq newmark (point)))
2003 (push-mark newmark))
2006 (defun append-to-buffer (buffer start end)
2007 "Append to specified buffer the text of the region.
2008 It is inserted into that buffer before its point.
2010 When calling from a program, give three arguments:
2011 BUFFER (or buffer name), START and END.
2012 START and END specify the portion of the current buffer to be copied."
2014 (list (read-buffer "Append to buffer: " (other-buffer (current-buffer) t))
2015 (region-beginning) (region-end)))
2016 (let ((oldbuf (current-buffer)))
2018 (let* ((append-to (get-buffer-create buffer))
2019 (windows (get-buffer-window-list append-to t t))
2021 (set-buffer append-to)
2022 (setq point (point))
2023 (barf-if-buffer-read-only)
2024 (insert-buffer-substring oldbuf start end)
2025 (dolist (window windows)
2026 (when (= (window-point window) point)
2027 (set-window-point window (point))))))))
2029 (defun prepend-to-buffer (buffer start end)
2030 "Prepend to specified buffer the text of the region.
2031 It is inserted into that buffer after its point.
2033 When calling from a program, give three arguments:
2034 BUFFER (or buffer name), START and END.
2035 START and END specify the portion of the current buffer to be copied."
2036 (interactive "BPrepend to buffer: \nr")
2037 (let ((oldbuf (current-buffer)))
2039 (set-buffer (get-buffer-create buffer))
2040 (barf-if-buffer-read-only)
2042 (insert-buffer-substring oldbuf start end)))))
2044 (defun copy-to-buffer (buffer start end)
2045 "Copy to specified buffer the text of the region.
2046 It is inserted into that buffer, replacing existing text there.
2048 When calling from a program, give three arguments:
2049 BUFFER (or buffer name), START and END.
2050 START and END specify the portion of the current buffer to be copied."
2051 (interactive "BCopy to buffer: \nr")
2052 (let ((oldbuf (current-buffer)))
2054 (set-buffer (get-buffer-create buffer))
2055 (barf-if-buffer-read-only)
2058 (insert-buffer-substring oldbuf start end)))))
2060 (put 'mark-inactive 'error-conditions '(mark-inactive error))
2061 (put 'mark-inactive 'error-message "The mark is not active now")
2063 (defun mark (&optional force)
2064 "Return this buffer's mark value as integer; error if mark inactive.
2065 If optional argument FORCE is non-nil, access the mark value
2066 even if the mark is not currently active, and return nil
2067 if there is no mark at all.
2069 If you are using this in an editing command, you are most likely making
2070 a mistake; see the documentation of `set-mark'."
2071 (if (or force (not transient-mark-mode) mark-active mark-even-if-inactive)
2072 (marker-position (mark-marker))
2073 (signal 'mark-inactive nil)))
2075 ;; Many places set mark-active directly, and several of them failed to also
2076 ;; run deactivate-mark-hook. This shorthand should simplify.
2077 (defsubst deactivate-mark ()
2078 "Deactivate the mark by setting `mark-active' to nil.
2079 \(That makes a difference only in Transient Mark mode.)
2080 Also runs the hook `deactivate-mark-hook'."
2081 (if transient-mark-mode
2083 (setq mark-active nil)
2084 (run-hooks 'deactivate-mark-hook))))
2086 (defun set-mark (pos)
2087 "Set this buffer's mark to POS. Don't use this function!
2088 That is to say, don't use this function unless you want
2089 the user to see that the mark has moved, and you want the previous
2090 mark position to be lost.
2092 Normally, when a new mark is set, the old one should go on the stack.
2093 This is why most applications should use push-mark, not set-mark.
2095 Novice Emacs Lisp programmers often try to use the mark for the wrong
2096 purposes. The mark saves a location for the user's convenience.
2097 Most editing commands should not alter the mark.
2098 To remember a location for internal use in the Lisp program,
2099 store it in a Lisp variable. Example:
2101 (let ((beg (point))) (forward-line 1) (delete-region beg (point)))."
2105 (setq mark-active t)
2106 (run-hooks 'activate-mark-hook)
2107 (set-marker (mark-marker) pos (current-buffer)))
2108 ;; Normally we never clear mark-active except in Transient Mark mode.
2109 ;; But when we actually clear out the mark value too,
2110 ;; we must clear mark-active in any mode.
2111 (setq mark-active nil)
2112 (run-hooks 'deactivate-mark-hook)
2113 (set-marker (mark-marker) nil)))
2115 (defvar mark-ring nil
2116 "The list of former marks of the current buffer, most recent first.")
2117 (make-variable-buffer-local 'mark-ring)
2118 (put 'mark-ring 'permanent-local t)
2120 (defcustom mark-ring-max 16
2121 "*Maximum size of mark ring. Start discarding off end if gets this big."
2123 :group 'editing-basics)
2125 (defvar global-mark-ring nil
2126 "The list of saved global marks, most recent first.")
2128 (defcustom global-mark-ring-max 16
2129 "*Maximum size of global mark ring. \
2130 Start discarding off end if gets this big."
2132 :group 'editing-basics)
2134 (defun set-mark-command (arg)
2135 "Set mark at where point is, or jump to mark.
2136 With no prefix argument, set mark, push old mark position on local mark
2137 ring, and push mark on global mark ring.
2138 With argument, jump to mark, and pop a new position for mark off the ring
2139 \(does not affect global mark ring\).
2141 Novice Emacs Lisp programmers often try to use the mark for the wrong
2142 purposes. See the documentation of `set-mark' for more information."
2146 (push-mark nil nil t))
2148 (error "No mark set in this buffer")
2149 (goto-char (mark t))
2152 (defun push-mark (&optional location nomsg activate)
2153 "Set mark at LOCATION (point, by default) and push old mark on mark ring.
2154 If the last global mark pushed was not in the current buffer,
2155 also push LOCATION on the global mark ring.
2156 Display `Mark set' unless the optional second arg NOMSG is non-nil.
2157 In Transient Mark mode, activate mark if optional third arg ACTIVATE non-nil.
2159 Novice Emacs Lisp programmers often try to use the mark for the wrong
2160 purposes. See the documentation of `set-mark' for more information.
2162 In Transient Mark mode, this does not activate the mark."
2165 (setq mark-ring (cons (copy-marker (mark-marker)) mark-ring))
2166 (if (> (length mark-ring) mark-ring-max)
2168 (move-marker (car (nthcdr mark-ring-max mark-ring)) nil)
2169 (setcdr (nthcdr (1- mark-ring-max) mark-ring) nil))))
2170 (set-marker (mark-marker) (or location (point)) (current-buffer))
2171 ;; Now push the mark on the global mark ring.
2172 (if (and global-mark-ring
2173 (eq (marker-buffer (car global-mark-ring)) (current-buffer)))
2174 ;; The last global mark pushed was in this same buffer.
2175 ;; Don't push another one.
2177 (setq global-mark-ring (cons (copy-marker (mark-marker)) global-mark-ring))
2178 (if (> (length global-mark-ring) global-mark-ring-max)
2180 (move-marker (car (nthcdr global-mark-ring-max global-mark-ring))
2182 (setcdr (nthcdr (1- global-mark-ring-max) global-mark-ring) nil))))
2183 (or nomsg executing-kbd-macro (> (minibuffer-depth) 0)
2184 (message "Mark set"))
2185 (if (or activate (not transient-mark-mode))
2186 (set-mark (mark t)))
2190 "Pop off mark ring into the buffer's actual mark.
2191 Does not set point. Does nothing if mark ring is empty."
2194 (setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker)))))
2195 (set-marker (mark-marker) (+ 0 (car mark-ring)) (current-buffer))
2197 (move-marker (car mark-ring) nil)
2198 (if (null (mark t)) (ding))
2199 (setq mark-ring (cdr mark-ring)))))
2201 (defalias 'exchange-dot-and-mark 'exchange-point-and-mark)
2202 (defun exchange-point-and-mark ()
2203 "Put the mark where point is now, and point where the mark is now.
2204 This command works even when the mark is not active,
2205 and it reactivates the mark."
2207 (let ((omark (mark t)))
2209 (error "No mark set in this buffer"))
2214 (defun transient-mark-mode (arg)
2215 "Toggle Transient Mark mode.
2216 With arg, turn Transient Mark mode on if arg is positive, off otherwise.
2218 In Transient Mark mode, when the mark is active, the region is highlighted.
2219 Changing the buffer \"deactivates\" the mark.
2220 So do certain other operations that set the mark
2221 but whose main purpose is something else--for example,
2222 incremental search, \\[beginning-of-buffer], and \\[end-of-buffer]."
2224 (setq transient-mark-mode
2226 (not transient-mark-mode)
2227 (> (prefix-numeric-value arg) 0)))
2229 (if transient-mark-mode
2230 (message "Transient Mark mode enabled")
2231 (message "Transient Mark mode disabled"))))
2233 (defun pop-global-mark ()
2234 "Pop off global mark ring and jump to the top location."
2236 ;; Pop entries which refer to non-existent buffers.
2237 (while (and global-mark-ring (not (marker-buffer (car global-mark-ring))))
2238 (setq global-mark-ring (cdr global-mark-ring)))
2239 (or global-mark-ring
2240 (error "No global mark set"))
2241 (let* ((marker (car global-mark-ring))
2242 (buffer (marker-buffer marker))
2243 (position (marker-position marker)))
2244 (setq global-mark-ring (nconc (cdr global-mark-ring)
2245 (list (car global-mark-ring))))
2247 (or (and (>= position (point-min))
2248 (<= position (point-max)))
2250 (goto-char position)
2251 (switch-to-buffer buffer)))
2253 (defcustom next-line-add-newlines t
2254 "*If non-nil, `next-line' inserts newline to avoid `end of buffer' error."
2256 :group 'editing-basics)
2258 (defun next-line (arg)
2259 "Move cursor vertically down ARG lines.
2260 If there is no character in the target line exactly under the current column,
2261 the cursor is positioned after the character in that line which spans this
2262 column, or at the end of the line if it is not long enough.
2263 If there is no line in the buffer after this one, behavior depends on the
2264 value of `next-line-add-newlines'. If non-nil, it inserts a newline character
2265 to create a line, and moves the cursor to that line. Otherwise it moves the
2266 cursor to the end of the buffer.
2268 The command \\[set-goal-column] can be used to create
2269 a semipermanent goal column for this command.
2270 Then instead of trying to move exactly vertically (or as close as possible),
2271 this command moves to the specified goal column (or as close as possible).
2272 The goal column is stored in the variable `goal-column', which is nil
2273 when there is no goal column.
2275 If you are thinking of using this in a Lisp program, consider
2276 using `forward-line' instead. It is usually easier to use
2277 and more reliable (no dependence on goal column, etc.)."
2279 (if (and next-line-add-newlines (= arg 1))
2280 (let ((opoint (point)))
2289 ((beginning-of-buffer end-of-buffer) (ding)))
2293 (defun previous-line (arg)
2294 "Move cursor vertically up ARG lines.
2295 If there is no character in the target line exactly over the current column,
2296 the cursor is positioned after the character in that line which spans this
2297 column, or at the end of the line if it is not long enough.
2299 The command \\[set-goal-column] can be used to create
2300 a semipermanent goal column for this command.
2301 Then instead of trying to move exactly vertically (or as close as possible),
2302 this command moves to the specified goal column (or as close as possible).
2303 The goal column is stored in the variable `goal-column', which is nil
2304 when there is no goal column.
2306 If you are thinking of using this in a Lisp program, consider using
2307 `forward-line' with a negative argument instead. It is usually easier
2308 to use and more reliable (no dependence on goal column, etc.)."
2313 ((beginning-of-buffer end-of-buffer) (ding)))
2314 (line-move (- arg)))
2317 (defcustom track-eol nil
2318 "*Non-nil means vertical motion starting at end of line keeps to ends of lines.
2319 This means moving to the end of each line moved onto.
2320 The beginning of a blank line does not count as the end of a line."
2322 :group 'editing-basics)
2324 (defcustom goal-column nil
2325 "*Semipermanent goal column for vertical motion, as set by \\[set-goal-column], or nil."
2326 :type '(choice integer
2327 (const :tag "None" nil))
2328 :group 'editing-basics)
2329 (make-variable-buffer-local 'goal-column)
2331 (defvar temporary-goal-column 0
2332 "Current goal column for vertical motion.
2333 It is the column where point was
2334 at the start of current run of vertical motion commands.
2335 When the `track-eol' feature is doing its job, the value is 9999.")
2337 (defcustom line-move-ignore-invisible nil
2338 "*Non-nil means \\[next-line] and \\[previous-line] ignore invisible lines.
2339 Outline mode sets this."
2341 :group 'editing-basics)
2343 ;; This is the guts of next-line and previous-line.
2344 ;; Arg says how many lines to move.
2345 (defun line-move (arg)
2346 ;; Don't run any point-motion hooks, and disregard intangibility,
2347 ;; for intermediate positions.
2348 (let ((inhibit-point-motion-hooks t)
2350 new line-end line-beg)
2353 (if (not (or (eq last-command 'next-line)
2354 (eq last-command 'previous-line)))
2355 (setq temporary-goal-column
2356 (if (and track-eol (eolp)
2357 ;; Don't count beg of empty line as end of line
2358 ;; unless we just did explicit end-of-line.
2359 (or (not (bolp)) (eq last-command 'end-of-line)))
2362 (if (and (not (integerp selective-display))
2363 (not line-move-ignore-invisible))
2364 ;; Use just newline characters.
2366 (progn (if (> arg 1) (forward-line (1- arg)))
2367 ;; This way of moving forward ARG lines
2368 ;; verifies that we have a newline after the last one.
2369 ;; It doesn't get confused by intangible text.
2371 (zerop (forward-line 1)))
2372 (and (zerop (forward-line arg))
2374 (signal (if (< arg 0)
2375 'beginning-of-buffer
2378 ;; Move by arg lines, but ignore invisible ones.
2381 (and (zerop (vertical-motion 1))
2382 (signal 'end-of-buffer nil))
2383 ;; If the following character is currently invisible,
2384 ;; skip all characters with that same `invisible' property value.
2385 (while (and (not (eobp))
2387 (get-char-property (point) 'invisible)))
2388 (if (eq buffer-invisibility-spec t)
2390 (or (memq prop buffer-invisibility-spec)
2391 (assq prop buffer-invisibility-spec)))))
2392 (if (get-text-property (point) 'invisible)
2393 (goto-char (next-single-property-change (point) 'invisible))
2394 (goto-char (next-overlay-change (point)))))
2395 (setq arg (1- arg)))
2398 (and (zerop (vertical-motion -1))
2399 (signal 'beginning-of-buffer nil))
2400 (while (and (not (bobp))
2402 (get-char-property (1- (point)) 'invisible)))
2403 (if (eq buffer-invisibility-spec t)
2405 (or (memq prop buffer-invisibility-spec)
2406 (assq prop buffer-invisibility-spec)))))
2407 (if (get-text-property (1- (point)) 'invisible)
2408 (goto-char (previous-single-property-change (point) 'invisible))
2409 (goto-char (previous-overlay-change (point)))))
2410 (setq arg (1+ arg))))
2411 (let ((buffer-invisibility-spec nil))
2412 (move-to-column (or goal-column temporary-goal-column))))
2414 ;; If we are moving into some intangible text,
2415 ;; look for following text on the same line which isn't intangible
2417 (setq line-end (save-excursion (end-of-line) (point)))
2418 (setq line-beg (save-excursion (beginning-of-line) (point)))
2419 (let ((after (and (< new (point-max))
2420 (get-char-property new 'intangible)))
2421 (before (and (> new (point-min))
2422 (get-char-property (1- new) 'intangible))))
2423 (when (and before (eq before after)
2425 (goto-char (point-min))
2426 (let ((inhibit-point-motion-hooks nil))
2428 (if (<= new line-end)
2429 (setq new (point)))))
2430 ;; NEW is where we want to move to.
2431 ;; LINE-BEG and LINE-END are the beginning and end of the line.
2432 ;; Move there in just one step, from our starting position,
2433 ;; with intangibility and point-motion hooks enabled this time.
2435 (setq inhibit-point-motion-hooks nil)
2436 (goto-char (constrain-to-field new opoint t t))
2437 ;; If intangibility processing moved us to a different line,
2438 ;; readjust the horizontal position within the line we ended up at.
2439 (when (or (< (point) line-beg) (> (point) line-end))
2441 (setq inhibit-point-motion-hooks t)
2442 (setq line-end (save-excursion (end-of-line) (point)))
2444 (setq line-beg (point))
2445 (let ((buffer-invisibility-spec nil))
2446 (move-to-column (or goal-column temporary-goal-column)))
2447 (if (<= (point) line-end)
2449 (goto-char (point-min))
2450 (setq inhibit-point-motion-hooks nil)
2451 (goto-char (constrain-to-field new opoint t t))
2455 ;;; Many people have said they rarely use this feature, and often type
2456 ;;; it by accident. Maybe it shouldn't even be on a key.
2457 (put 'set-goal-column 'disabled t)
2459 (defun set-goal-column (arg)
2460 "Set the current horizontal position as a goal for \\[next-line] and \\[previous-line].
2461 Those commands will move to this position in the line moved to
2462 rather than trying to keep the same horizontal position.
2463 With a non-nil argument, clears out the goal column
2464 so that \\[next-line] and \\[previous-line] resume vertical motion.
2465 The goal column is stored in the variable `goal-column'."
2469 (setq goal-column nil)
2470 (message "No goal column"))
2471 (setq goal-column (current-column))
2472 (message (substitute-command-keys
2473 "Goal column %d (use \\[set-goal-column] with an arg to unset it)")
2478 (defun scroll-other-window-down (lines)
2479 "Scroll the \"other window\" down.
2480 For more details, see the documentation for `scroll-other-window'."
2482 (scroll-other-window
2483 ;; Just invert the argument's meaning.
2484 ;; We can do that without knowing which window it will be.
2485 (if (eq lines '-) nil
2487 (- (prefix-numeric-value lines))))))
2488 (define-key esc-map [?\C-\S-v] 'scroll-other-window-down)
2490 (defun beginning-of-buffer-other-window (arg)
2491 "Move point to the beginning of the buffer in the other window.
2492 Leave mark at previous position.
2493 With arg N, put point N/10 of the way from the true beginning."
2495 (let ((orig-window (selected-window))
2496 (window (other-window-for-scrolling)))
2497 ;; We use unwind-protect rather than save-window-excursion
2498 ;; because the latter would preserve the things we want to change.
2501 (select-window window)
2502 ;; Set point and mark in that window's buffer.
2503 (beginning-of-buffer arg)
2504 ;; Set point accordingly.
2506 (select-window orig-window))))
2508 (defun end-of-buffer-other-window (arg)
2509 "Move point to the end of the buffer in the other window.
2510 Leave mark at previous position.
2511 With arg N, put point N/10 of the way from the true end."
2513 ;; See beginning-of-buffer-other-window for comments.
2514 (let ((orig-window (selected-window))
2515 (window (other-window-for-scrolling)))
2518 (select-window window)
2521 (select-window orig-window))))
2523 (defun transpose-chars (arg)
2524 "Interchange characters around point, moving forward one character.
2525 With prefix arg ARG, effect is to take character before point
2526 and drag it forward past ARG other characters (backward if ARG negative).
2527 If no argument and at end of line, the previous two chars are exchanged."
2529 (and (null arg) (eolp) (forward-char -1))
2530 (transpose-subr 'forward-char (prefix-numeric-value arg)))
2532 (defun transpose-words (arg)
2533 "Interchange words around point, leaving point at end of them.
2534 With prefix arg ARG, effect is to take word before or around point
2535 and drag it forward past ARG other words (backward if ARG negative).
2536 If ARG is zero, the words around or after point and around or after mark
2539 (transpose-subr 'forward-word arg))
2541 (defun transpose-sexps (arg)
2542 "Like \\[transpose-words] but applies to sexps.
2543 Does not work on a sexp that point is in the middle of
2544 if it is a list or string."
2546 (transpose-subr 'forward-sexp arg))
2548 (defun transpose-lines (arg)
2549 "Exchange current line and previous line, leaving point after both.
2550 With argument ARG, takes previous line and moves it past ARG lines.
2551 With argument 0, interchanges line point is in with line mark is in."
2553 (transpose-subr (function
2557 ;; Move forward over ARG lines,
2558 ;; but create newlines if necessary.
2559 (setq arg (forward-line arg))
2560 (if (/= (preceding-char) ?\n)
2561 (setq arg (1+ arg)))
2564 (forward-line arg))))
2567 (defvar transpose-subr-start1)
2568 (defvar transpose-subr-start2)
2569 (defvar transpose-subr-end1)
2570 (defvar transpose-subr-end2)
2572 (defun transpose-subr (mover arg)
2573 (let (transpose-subr-start1
2575 transpose-subr-start2
2576 transpose-subr-end2)
2581 (setq transpose-subr-end2 (point))
2583 (setq transpose-subr-start2 (point))
2586 (setq transpose-subr-end1 (point))
2588 (setq transpose-subr-start1 (point))
2590 (exchange-point-and-mark))
2594 (setq transpose-subr-start1 (point))
2596 (setq transpose-subr-end1 (point))
2598 (setq transpose-subr-end2 (point))
2599 (funcall mover (- arg))
2600 (setq transpose-subr-start2 (point))
2602 (goto-char transpose-subr-end2))
2604 (setq transpose-subr-start2 (point))
2606 (setq transpose-subr-end2 (point))
2607 (funcall mover (1- arg))
2608 (setq transpose-subr-start1 (point))
2609 (funcall mover (- arg))
2610 (setq transpose-subr-end1 (point))
2611 (transpose-subr-1)))))
2613 (defun transpose-subr-1 ()
2614 (if (> (min transpose-subr-end1 transpose-subr-end2)
2615 (max transpose-subr-start1 transpose-subr-start2))
2616 (error "Don't have two things to transpose"))
2617 (let* ((word1 (buffer-substring transpose-subr-start1 transpose-subr-end1))
2618 (len1 (length word1))
2619 (word2 (buffer-substring transpose-subr-start2 transpose-subr-end2))
2620 (len2 (length word2)))
2621 (delete-region transpose-subr-start2 transpose-subr-end2)
2622 (goto-char transpose-subr-start2)
2624 (goto-char (if (< transpose-subr-start1 transpose-subr-start2)
2625 transpose-subr-start1
2626 (+ transpose-subr-start1 (- len1 len2))))
2627 (delete-region (point) (+ (point) len1))
2630 (defcustom comment-column 32
2631 "*Column to indent right-margin comments to.
2632 Setting this variable automatically makes it local to the current buffer.
2633 Each mode establishes a different default value for this variable; you
2634 can set the value for a particular mode using that mode's hook."
2636 :group 'fill-comments)
2637 (make-variable-buffer-local 'comment-column)
2639 (defcustom comment-start nil
2640 "*String to insert to start a new comment, or nil if no comment syntax."
2641 :type '(choice (const :tag "None" nil)
2643 :group 'fill-comments)
2645 (defcustom comment-start-skip nil
2646 "*Regexp to match the start of a comment plus everything up to its body.
2647 If there are any \\(...\\) pairs, the comment delimiter text is held to begin
2648 at the place matched by the close of the first pair."
2649 :type '(choice (const :tag "None" nil)
2651 :group 'fill-comments)
2653 (defcustom comment-end ""
2654 "*String to insert to end a new comment.
2655 Should be an empty string if comments are terminated by end-of-line."
2657 :group 'fill-comments)
2659 (defvar comment-indent-hook nil
2660 "Obsolete variable for function to compute desired indentation for a comment.
2661 This function is called with no args with point at the beginning of
2662 the comment's starting delimiter.")
2664 (defvar comment-indent-function
2665 (lambda () comment-column)
2666 "Function to compute desired indentation for a comment.
2667 This function is called with no args with point at the beginning of
2668 the comment's starting delimiter.")
2670 (defcustom block-comment-start nil
2671 "*String to insert to start a new comment on a line by itself.
2672 If nil, use `comment-start' instead.
2673 Note that the regular expression `comment-start-skip' should skip this string
2674 as well as the `comment-start' string."
2675 :type '(choice (const :tag "Use comment-start" nil)
2677 :group 'fill-comments)
2679 (defcustom block-comment-end nil
2680 "*String to insert to end a new comment on a line by itself.
2681 Should be an empty string if comments are terminated by end-of-line.
2682 If nil, use `comment-end' instead."
2683 :type '(choice (const :tag "Use comment-end" nil)
2685 :group 'fill-comments)
2687 (defun indent-for-comment ()
2688 "Indent this line's comment to comment column, or insert an empty comment."
2690 (let* ((empty (save-excursion (beginning-of-line)
2691 (looking-at "[ \t]*$")))
2692 (starter (or (and empty block-comment-start) comment-start))
2693 (ender (or (and empty block-comment-end) comment-end)))
2696 (error "No comment syntax defined"))
2697 ((null comment-start-skip)
2698 (error "This mode doesn't define `comment-start-skip'"))
2699 (t (let* ((eolpos (save-excursion (end-of-line) (point)))
2702 (if (re-search-forward comment-start-skip eolpos 'move)
2703 (progn (setq cpos (point-marker))
2704 ;; Find the start of the comment delimiter.
2705 ;; If there were paren-pairs in comment-start-skip,
2706 ;; position at the end of the first pair.
2708 (goto-char (match-end 1))
2709 ;; If comment-start-skip matched a string with
2710 ;; internal whitespace (not final whitespace) then
2711 ;; the delimiter start at the end of that
2712 ;; whitespace. Otherwise, it starts at the
2713 ;; beginning of what was matched.
2714 (skip-syntax-backward " " (match-beginning 0))
2715 (skip-syntax-backward "^ " (match-beginning 0)))))
2716 (setq begpos (point))
2717 ;; Compute desired indent.
2718 (if (= (current-column)
2719 (setq indent (if comment-indent-hook
2720 (funcall comment-indent-hook)
2721 (funcall comment-indent-function))))
2723 ;; If that's different from current, change it.
2724 (skip-chars-backward " \t")
2725 (delete-region (point) begpos)
2727 ;; An existing comment?
2729 (progn (goto-char cpos)
2730 (set-marker cpos nil))
2734 (insert ender))))))))
2736 (defun set-comment-column (arg)
2737 "Set the comment column based on point.
2738 With no arg, set the comment column to the current column.
2739 With just minus as arg, kill any comment on this line.
2740 With any other arg, set comment column to indentation of the previous comment
2741 and then align or create a comment on this line at that column."
2749 (re-search-backward comment-start-skip)
2751 (re-search-forward comment-start-skip)
2752 (goto-char (match-beginning 0))
2753 (setq comment-column (current-column))
2754 (message "Comment column set to %d" comment-column))
2755 (indent-for-comment))
2756 (setq comment-column (current-column))
2757 (message "Comment column set to %d" comment-column))))
2759 (defun kill-comment (arg)
2760 "Kill the comment on this line, if any.
2761 With argument, kill comments on that many lines starting with this one."
2762 ;; this function loses in a lot of situations. it incorrectly recognises
2763 ;; comment delimiters sometimes (ergo, inside a string), doesn't work
2764 ;; with multi-line comments, can kill extra whitespace if comment wasn't
2765 ;; through end-of-line, et cetera.
2767 (or comment-start-skip (error "No comment syntax defined"))
2768 (let ((count (prefix-numeric-value arg)) endc)
2774 (and (string< "" comment-end)
2777 (re-search-forward (regexp-quote comment-end) endc 'move)
2778 (skip-chars-forward " \t")
2781 (if (re-search-forward comment-start-skip endc t)
2783 (goto-char (match-beginning 0))
2784 (skip-chars-backward " \t")
2785 (kill-region (point) endc)
2786 ;; to catch comments a line beginnings
2787 (indent-according-to-mode))))
2788 (if arg (forward-line 1))
2789 (setq count (1- count)))))
2791 (defvar comment-padding 1
2792 "Number of spaces `comment-region' puts between comment chars and text.
2794 Extra spacing between the comment characters and the comment text
2795 makes the comment easier to read. Default is 1. Nil means 0 and is
2798 (defun comment-region (beg end &optional arg)
2799 "Comment or uncomment each line in the region.
2800 With just C-u prefix arg, uncomment each line in region.
2801 Numeric prefix arg ARG means use ARG comment characters.
2802 If ARG is negative, delete that many comment characters instead.
2803 Comments are terminated on each line, even for syntax in which newline does
2804 not end the comment. Blank lines do not get comments.
2806 The strings used as comment starts are build from
2807 `comment-start' without trailing spaces and `comment-padding'."
2808 ;; if someone wants it to only put a comment-start at the beginning and
2809 ;; comment-end at the end then typing it, C-x C-x, closing it, C-x C-x
2810 ;; is easy enough. No option is made here for other than commenting
2812 (interactive "*r\nP")
2813 (or comment-start (error "No comment syntax is defined"))
2814 (if (> beg end) (let (mid) (setq mid beg beg end end mid)))
2817 (let* ((comment-start
2818 (substring comment-start 0
2819 (string-match "[ \t]*$" comment-start)))
2820 (cs comment-start) (ce comment-end)
2821 (cp (when comment-padding
2822 (make-string comment-padding ? )))
2824 (if (consp arg) (setq numarg t)
2825 (setq numarg (prefix-numeric-value arg))
2826 ;; For positive arg > 1, replicate the comment delims now,
2827 ;; then insert the replicated strings just once.
2829 (setq cs (concat cs comment-start)
2830 ce (concat ce comment-end))
2831 (setq numarg (1- numarg))))
2832 ;; Loop over all lines from BEG to END.
2833 (narrow-to-region beg end)
2835 (if (or (eq numarg t) (< numarg 0))
2837 (let (found-comment)
2838 ;; Delete comment start from beginning of line.
2840 (while (looking-at (regexp-quote cs))
2841 (setq found-comment t)
2842 (delete-char (length cs)))
2843 (let ((count numarg))
2844 (while (and (> 1 (setq count (1+ count)))
2845 (looking-at (regexp-quote cs)))
2846 (setq found-comment t)
2847 (delete-char (length cs)))))
2848 ;; Delete comment padding from beginning of line
2849 (when (and found-comment comment-padding
2850 (looking-at (regexp-quote cp)))
2851 (delete-char comment-padding))
2852 ;; Delete comment end from end of line.
2858 ;; This is questionable if comment-end ends in
2859 ;; whitespace. That is pretty brain-damaged,
2861 (while (progn (skip-chars-backward " \t")
2862 (and (>= (- (point) (point-min)) (length ce))
2864 (backward-char (length ce))
2865 (looking-at (regexp-quote ce)))))
2866 (delete-char (- (length ce)))))
2867 (let ((count numarg))
2868 (while (> 1 (setq count (1+ count)))
2870 ;; this is questionable if comment-end ends in whitespace
2871 ;; that is pretty brain-damaged though
2872 (skip-chars-backward " \t")
2873 (if (>= (- (point) (point-min)) (length ce))
2875 (backward-char (length ce))
2876 (if (looking-at (regexp-quote ce))
2877 (delete-char (length ce)))))))))
2880 (when comment-padding
2881 (setq cs (concat cs cp)))
2883 ;; Insert at beginning and at end.
2884 (if (looking-at "[ \t]*$") ()
2886 (if (string= "" ce) ()
2889 (search-forward "\n" nil 'move)))))))
2891 (defun backward-word (arg)
2892 "Move backward until encountering the end of a word.
2893 With argument, do this that many times.
2894 In programs, it is faster to call `forward-word' with negative arg."
2896 (forward-word (- arg)))
2898 (defun mark-word (arg)
2899 "Set mark arg words away from point."
2907 (defun kill-word (arg)
2908 "Kill characters forward until encountering the end of a word.
2909 With argument, do this that many times."
2911 (kill-region (point) (progn (forward-word arg) (point))))
2913 (defun backward-kill-word (arg)
2914 "Kill characters backward until encountering the end of a word.
2915 With argument, do this that many times."
2917 (kill-word (- arg)))
2919 (defun current-word (&optional strict)
2920 "Return the word point is on (or a nearby word) as a string.
2921 If optional arg STRICT is non-nil, return nil unless point is within
2922 or adjacent to a word."
2924 (let ((oldpoint (point)) (start (point)) (end (point)))
2925 (skip-syntax-backward "w_") (setq start (point))
2926 (goto-char oldpoint)
2927 (skip-syntax-forward "w_") (setq end (point))
2928 (if (and (eq start oldpoint) (eq end oldpoint))
2929 ;; Point is neither within nor adjacent to a word.
2932 ;; Look for preceding word in same line.
2933 (skip-syntax-backward "^w_"
2934 (save-excursion (beginning-of-line)
2937 ;; No preceding word in same line.
2938 ;; Look for following word in same line.
2940 (skip-syntax-forward "^w_"
2941 (save-excursion (end-of-line)
2943 (setq start (point))
2944 (skip-syntax-forward "w_")
2947 (skip-syntax-backward "w_")
2948 (setq start (point)))
2949 (buffer-substring-no-properties start end)))
2950 (buffer-substring-no-properties start end)))))
2952 (defcustom fill-prefix nil
2953 "*String for filling to insert at front of new line, or nil for none.
2954 Setting this variable automatically makes it local to the current buffer."
2955 :type '(choice (const :tag "None" nil)
2958 (make-variable-buffer-local 'fill-prefix)
2960 (defcustom auto-fill-inhibit-regexp nil
2961 "*Regexp to match lines which should not be auto-filled."
2962 :type '(choice (const :tag "None" nil)
2966 (defvar comment-line-break-function 'indent-new-comment-line
2967 "*Mode-specific function which line breaks and continues a comment.
2969 This function is only called during auto-filling of a comment section.
2970 The function should take a single optional argument, which is a flag
2971 indicating whether it should use soft newlines.
2973 Setting this variable automatically makes it local to the current buffer.")
2975 ;; This function is used as the auto-fill-function of a buffer
2976 ;; when Auto-Fill mode is enabled.
2977 ;; It returns t if it really did any work.
2978 ;; (Actually some major modes use a different auto-fill function,
2979 ;; but this one is the default one.)
2980 (defun do-auto-fill ()
2981 (let (fc justify bol give-up
2982 (fill-prefix fill-prefix))
2983 (if (or (not (setq justify (current-justification)))
2984 (null (setq fc (current-fill-column)))
2985 (and (eq justify 'left)
2986 (<= (current-column) fc))
2987 (save-excursion (beginning-of-line)
2989 (and auto-fill-inhibit-regexp
2990 (looking-at auto-fill-inhibit-regexp))))
2991 nil ;; Auto-filling not required
2992 (if (memq justify '(full center right))
2993 (save-excursion (unjustify-current-line)))
2995 ;; Choose a fill-prefix automatically.
2996 (if (and adaptive-fill-mode
2997 (or (null fill-prefix) (string= fill-prefix "")))
2999 (fill-context-prefix
3000 (save-excursion (backward-paragraph 1) (point))
3001 (save-excursion (forward-paragraph 1) (point)))))
3002 (and prefix (not (equal prefix ""))
3003 (setq fill-prefix prefix))))
3005 (while (and (not give-up) (> (current-column) fc))
3006 ;; Determine where to split the line.
3009 (let ((opoint (point))
3014 (setq after-prefix (point))
3016 (looking-at (regexp-quote fill-prefix))
3017 (setq after-prefix (match-end 0)))
3018 (move-to-column (1+ fc))
3019 ;; Move back to the point where we can break the line.
3020 ;; We break the line between word or
3021 ;; after/before the character which has character
3022 ;; category `|'. We search space, \c| followed by
3023 ;; a character, or \c| following a character. If
3024 ;; not found, place the point at beginning of line.
3026 ;; If this is after period and a single space,
3027 ;; move back once more--we don't want to break
3028 ;; the line there and make it look like a
3032 sentence-end-double-space
3033 (save-excursion (forward-char -1)
3034 (and (looking-at "\\. ")
3035 (not (looking-at "\\. ")))))
3038 fill-nobreak-predicate
3039 (funcall fill-nobreak-predicate)))
3041 (re-search-backward "[ \t]\\|\\c|.\\|.\\c|\\|^")
3042 ;; If we find nowhere on the line to break it,
3043 ;; break after one word. Set bounce to t
3044 ;; so we will not keep going in this while loop.
3045 (if (<= (point) after-prefix)
3047 (goto-char after-prefix)
3048 (re-search-forward "[ \t]" opoint t)
3050 (if (looking-at "[ \t]")
3051 ;; Break the line at word boundary.
3052 (skip-chars-backward " \t")
3053 ;; Break the line after/before \c|.
3055 (if enable-multibyte-characters
3056 ;; If we are going to break the line after or
3057 ;; before a non-ascii character, we may have
3058 ;; to run a special function for the charset
3059 ;; of the character to find the correct break
3061 (if (not (and (eq (charset-after (1- (point))) 'ascii)
3062 (eq (charset-after (point)) 'ascii)))
3063 (fill-find-break-point after-prefix)))
3065 ;; Let fill-point be set to the place where we end up.
3066 ;; But move back before any whitespace here.
3067 (skip-chars-backward " \t")
3070 ;; See whether the place we found is any good.
3072 (goto-char fill-point)
3074 ;; There is no use breaking at end of line.
3075 (not (save-excursion (skip-chars-forward " ") (eolp)))
3076 ;; It is futile to split at the end of the prefix
3077 ;; since we would just insert the prefix again.
3078 (not (and after-prefix (<= (point) after-prefix)))
3079 ;; Don't split right after a comment starter
3080 ;; since we would just make another comment starter.
3081 (not (and comment-start-skip
3082 (let ((limit (point)))
3084 (and (re-search-forward comment-start-skip
3086 (eq (point) limit)))))))
3087 ;; Ok, we have a useful place to break the line. Do it.
3088 (let ((prev-column (current-column)))
3089 ;; If point is at the fill-point, do not `save-excursion'.
3090 ;; Otherwise, if a comment prefix or fill-prefix is inserted,
3091 ;; point will end up before it rather than after it.
3093 (skip-chars-backward " \t")
3094 (= (point) fill-point))
3095 (funcall comment-line-break-function t)
3097 (goto-char fill-point)
3098 (funcall comment-line-break-function t)))
3099 ;; Now do justification, if required
3100 (if (not (eq justify 'left))
3103 (justify-current-line justify nil t)))
3104 ;; If making the new line didn't reduce the hpos of
3105 ;; the end of the line, then give up now;
3106 ;; trying again will not help.
3107 (if (>= (current-column) prev-column)
3109 ;; No good place to break => stop trying.
3111 ;; Justify last line.
3112 (justify-current-line justify t t)
3115 (defvar normal-auto-fill-function 'do-auto-fill
3116 "The function to use for `auto-fill-function' if Auto Fill mode is turned on.
3117 Some major modes set this.")
3119 (defun auto-fill-mode (&optional arg)
3120 "Toggle Auto Fill mode.
3121 With arg, turn Auto Fill mode on if and only if arg is positive.
3122 In Auto Fill mode, inserting a space at a column beyond `current-fill-column'
3123 automatically breaks the line at a previous space.
3125 The value of `normal-auto-fill-function' specifies the function to use
3126 for `auto-fill-function' when turning Auto Fill mode on."
3128 (prog1 (setq auto-fill-function
3130 (not auto-fill-function)
3131 (> (prefix-numeric-value arg) 0))
3132 normal-auto-fill-function
3134 (force-mode-line-update)))
3136 ;; This holds a document string used to document auto-fill-mode.
3137 (defun auto-fill-function ()
3138 "Automatically break line at a previous space, in insertion of text."
3141 (defun turn-on-auto-fill ()
3142 "Unconditionally turn on Auto Fill mode."
3144 (custom-add-option 'text-mode-hook 'turn-on-auto-fill)
3146 (defun set-fill-column (arg)
3147 "Set `fill-column' to specified argument.
3148 Use \\[universal-argument] followed by a number to specify a column.
3149 Just \\[universal-argument] as argument means to use the current column."
3152 (setq arg (current-column)))
3153 (if (not (integerp arg))
3154 ;; Disallow missing argument; it's probably a typo for C-x C-f.
3155 (error "set-fill-column requires an explicit argument")
3156 (message "Fill column set to %d (was %d)" arg fill-column)
3157 (setq fill-column arg)))
3159 (defcustom comment-multi-line nil
3160 "*Non-nil means \\[indent-new-comment-line] should continue same comment
3161 on new line, with no new terminator or starter.
3162 This is obsolete because you might as well use \\[newline-and-indent]."
3164 :group 'fill-comments)
3166 (defun indent-new-comment-line (&optional soft)
3167 "Break line at point and indent, continuing comment if within one.
3168 This indents the body of the continued comment
3169 under the previous comment line.
3171 This command is intended for styles where you write a comment per line,
3172 starting a new comment (and terminating it if necessary) on each line.
3173 If you want to continue one comment across several lines, use \\[newline-and-indent].
3175 If a fill column is specified, it overrides the use of the comment column
3176 or comment indentation.
3178 The inserted newline is marked hard if `use-hard-newlines' is true,
3179 unless optional argument SOFT is non-nil."
3181 (let (comcol comstart)
3182 (skip-chars-backward " \t")
3183 (delete-region (point)
3184 (progn (skip-chars-forward " \t")
3186 (if soft (insert-and-inherit ?\n) (newline 1))
3189 (indent-to-left-margin)
3190 (insert-and-inherit fill-prefix))
3191 (if (not comment-multi-line)
3193 (if (and comment-start-skip
3194 (let ((opoint (1- (point)))
3197 ;; Determine (more or less) whether
3198 ;; target position is inside a comment.
3199 (while (and (re-search-forward comment-start-skip opoint t)
3200 (not (setq inside (or (equal comment-end "")
3201 (not (search-forward comment-end opoint t)))))))
3203 ;; The old line has a comment and point was inside the comment.
3204 ;; Set WIN to the pos of the comment-start.
3205 ;; But if the comment is empty, look at preceding lines
3206 ;; to find one that has a nonempty comment.
3208 ;; If comment-start-skip contains a \(...\) pair,
3209 ;; the real comment delimiter starts at the end of that pair.
3210 (let ((win (or (match-end 1) (match-beginning 0))))
3211 (while (and (eolp) (not (bobp))
3214 (setq opoint (point))
3216 (re-search-forward comment-start-skip opoint t)))
3217 (setq win (or (match-end 1) (match-beginning 0))))
3218 ;; Indent this line like what we found.
3220 (setq comcol (current-column))
3222 (buffer-substring (point) (match-end 0)))))))
3224 (let ((comment-column comcol)
3225 (comment-start comstart)
3226 (comment-end comment-end))
3227 (and comment-end (not (equal comment-end ""))
3228 ; (if (not comment-multi-line)
3231 (insert comment-end)
3233 ; (setq comment-column (+ comment-column (length comment-start))
3238 (setq comment-end ""))
3239 (insert-and-inherit ?\n)
3241 (indent-for-comment)
3243 ;; Make sure we delete the newline inserted above.
3246 (indent-according-to-mode)))))
3248 (defun set-selective-display (arg)
3249 "Set `selective-display' to ARG; clear it if no arg.
3250 When the value of `selective-display' is a number > 0,
3251 lines whose indentation is >= that value are not displayed.
3252 The variable `selective-display' has a separate value for each buffer."
3254 (if (eq selective-display t)
3255 (error "selective-display already in use for marked lines"))
3258 (narrow-to-region (point-min) (point))
3259 (goto-char (window-start))
3260 (vertical-motion (window-height)))))
3261 (setq selective-display
3262 (and arg (prefix-numeric-value arg)))
3263 (recenter current-vpos))
3264 (set-window-start (selected-window) (window-start (selected-window)))
3265 (princ "selective-display set to " t)
3266 (prin1 selective-display t)
3269 (defvar overwrite-mode-textual " Ovwrt"
3270 "The string displayed in the mode line when in overwrite mode.")
3271 (defvar overwrite-mode-binary " Bin Ovwrt"
3272 "The string displayed in the mode line when in binary overwrite mode.")
3274 (defun overwrite-mode (arg)
3275 "Toggle overwrite mode.
3276 With arg, turn overwrite mode on iff arg is positive.
3277 In overwrite mode, printing characters typed in replace existing text
3278 on a one-for-one basis, rather than pushing it to the right. At the
3279 end of a line, such characters extend the line. Before a tab,
3280 such characters insert until the tab is filled in.
3281 \\[quoted-insert] still inserts characters in overwrite mode; this
3282 is supposed to make it easier to insert characters when necessary."
3284 (setq overwrite-mode
3285 (if (if (null arg) (not overwrite-mode)
3286 (> (prefix-numeric-value arg) 0))
3287 'overwrite-mode-textual))
3288 (force-mode-line-update))
3290 (defun binary-overwrite-mode (arg)
3291 "Toggle binary overwrite mode.
3292 With arg, turn binary overwrite mode on iff arg is positive.
3293 In binary overwrite mode, printing characters typed in replace
3294 existing text. Newlines are not treated specially, so typing at the
3295 end of a line joins the line to the next, with the typed character
3296 between them. Typing before a tab character simply replaces the tab
3297 with the character typed.
3298 \\[quoted-insert] replaces the text at the cursor, just as ordinary
3299 typing characters do.
3301 Note that binary overwrite mode is not its own minor mode; it is a
3302 specialization of overwrite-mode, entered by setting the
3303 `overwrite-mode' variable to `overwrite-mode-binary'."
3305 (setq overwrite-mode
3307 (not (eq overwrite-mode 'overwrite-mode-binary))
3308 (> (prefix-numeric-value arg) 0))
3309 'overwrite-mode-binary))
3310 (force-mode-line-update))
3312 (defcustom line-number-mode t
3313 "*Non-nil means display line number in mode line."
3315 :group 'editing-basics)
3317 (defun line-number-mode (arg)
3318 "Toggle Line Number mode.
3319 With arg, turn Line Number mode on iff arg is positive.
3320 When Line Number mode is enabled, the line number appears
3323 Line numbers do not appear for very large buffers, see variable
3324 `line-number-display-limit'."
3326 (setq line-number-mode
3327 (if (null arg) (not line-number-mode)
3328 (> (prefix-numeric-value arg) 0)))
3329 (force-mode-line-update))
3331 (defcustom column-number-mode nil
3332 "*Non-nil means display column number in mode line."
3334 :group 'editing-basics)
3336 (defun column-number-mode (arg)
3337 "Toggle Column Number mode.
3338 With arg, turn Column Number mode on iff arg is positive.
3339 When Column Number mode is enabled, the column number appears
3342 (setq column-number-mode
3343 (if (null arg) (not column-number-mode)
3344 (> (prefix-numeric-value arg) 0)))
3345 (force-mode-line-update))
3347 (defgroup paren-blinking nil
3348 "Blinking matching of parens and expressions."
3349 :prefix "blink-matching-"
3350 :group 'paren-matching)
3352 (defcustom blink-matching-paren t
3353 "*Non-nil means show matching open-paren when close-paren is inserted."
3355 :group 'paren-blinking)
3357 (defcustom blink-matching-paren-on-screen t
3358 "*Non-nil means show matching open-paren when it is on screen.
3359 If nil, means don't show it (but the open-paren can still be shown
3360 when it is off screen)."
3362 :group 'paren-blinking)
3364 (defcustom blink-matching-paren-distance (* 25 1024)
3365 "*If non-nil, is maximum distance to search for matching open-paren."
3367 :group 'paren-blinking)
3369 (defcustom blink-matching-delay 1
3370 "*Time in seconds to delay after showing a matching paren."
3372 :group 'paren-blinking)
3374 (defcustom blink-matching-paren-dont-ignore-comments nil
3375 "*Non-nil means `blink-matching-paren' will not ignore comments."
3377 :group 'paren-blinking)
3379 (defun blink-matching-open ()
3380 "Move cursor momentarily to the beginning of the sexp before point."
3382 (and (> (point) (1+ (point-min)))
3383 blink-matching-paren
3384 ;; Verify an even number of quoting characters precede the close.
3385 (= 1 (logand 1 (- (point)
3388 (skip-syntax-backward "/\\")
3390 (let* ((oldpos (point))
3395 (if blink-matching-paren-distance
3396 (narrow-to-region (max (point-min)
3397 (- (point) blink-matching-paren-distance))
3400 (let ((parse-sexp-ignore-comments
3401 (and parse-sexp-ignore-comments
3402 (not blink-matching-paren-dont-ignore-comments))))
3403 (setq blinkpos (scan-sexps oldpos -1)))
3406 (/= (char-syntax (char-after blinkpos))
3409 (or (null (matching-paren (char-after blinkpos)))
3410 (/= (char-after (1- oldpos))
3411 (matching-paren (char-after blinkpos))))))
3412 (if mismatch (setq blinkpos nil))
3414 ;; Don't log messages about paren matching.
3415 (let (message-log-max)
3416 (goto-char blinkpos)
3417 (if (pos-visible-in-window-p)
3418 (and blink-matching-paren-on-screen
3419 (sit-for blink-matching-delay))
3420 (goto-char blinkpos)
3423 ;; Show what precedes the open in its line, if anything.
3425 (skip-chars-backward " \t")
3427 (buffer-substring (progn (beginning-of-line) (point))
3429 ;; Show what follows the open in its line, if anything.
3432 (skip-chars-forward " \t")
3434 (buffer-substring blinkpos
3435 (progn (end-of-line) (point)))
3436 ;; Otherwise show the previous nonblank line,
3439 (skip-chars-backward "\n \t")
3442 (buffer-substring (progn
3443 (skip-chars-backward "\n \t")
3446 (progn (end-of-line)
3447 (skip-chars-backward " \t")
3449 ;; Replace the newline and other whitespace with `...'.
3451 (buffer-substring blinkpos (1+ blinkpos)))
3452 ;; There is nothing to show except the char itself.
3453 (buffer-substring blinkpos (1+ blinkpos))))))))
3455 (message "Mismatched parentheses"))
3456 ((not blink-matching-paren-distance)
3457 (message "Unmatched parenthesis"))))))))
3459 ;Turned off because it makes dbx bomb out.
3460 (setq blink-paren-function 'blink-matching-open)
3462 ;; This executes C-g typed while Emacs is waiting for a command.
3463 ;; Quitting out of a program does not go through here;
3464 ;; that happens in the QUIT macro at the C code level.
3465 (defun keyboard-quit ()
3466 "Signal a `quit' condition.
3467 During execution of Lisp code, this character causes a quit directly.
3468 At top-level, as an editor command, this simply beeps."
3473 (define-key global-map "\C-g" 'keyboard-quit)
3475 (defvar buffer-quit-function nil
3476 "Function to call to \"quit\" the current buffer, or nil if none.
3477 \\[keyboard-escape-quit] calls this function when its more local actions
3478 \(such as cancelling a prefix argument, minibuffer or region) do not apply.")
3480 (defun keyboard-escape-quit ()
3481 "Exit the current \"mode\" (in a generalized sense of the word).
3482 This command can exit an interactive command such as `query-replace',
3483 can clear out a prefix argument or a region,
3484 can get out of the minibuffer or other recursive edit,
3485 cancel the use of the current buffer (for special-purpose buffers),
3486 or go back to just one window (by deleting all but the selected window)."
3488 (cond ((eq last-command 'mode-exited) nil)
3489 ((> (minibuffer-depth) 0)
3490 (abort-recursive-edit))
3493 ((and transient-mark-mode
3496 ((> (recursion-depth) 0)
3497 (exit-recursive-edit))
3498 (buffer-quit-function
3499 (funcall buffer-quit-function))
3500 ((not (one-window-p t))
3501 (delete-other-windows))
3502 ((string-match "^ \\*" (buffer-name (current-buffer)))
3505 (define-key global-map "\e\e\e" 'keyboard-escape-quit)
3507 (defcustom input-mode-8-bit t
3508 "Control acceptance of 8-bit keyboard input.
3509 This may be useful for inputting non-ASCII characters if your keyboard
3510 can generate them. It is not necessary to change this under a window
3511 system which can distinguish 8-bit characters and Meta keys.
3512 Setting this variable directly does not take effect;
3513 use either M-x customize or the function `set-input-mode'."
3514 :set (lambda (symbol value)
3515 (let ((mode (current-input-mode)))
3516 (set-input-mode (nth 0 mode) (nth 1 mode) value)))
3517 :initialize 'custom-initialize-default
3518 :type '(choice (const :tag "8-bit input for a Meta key" t)
3519 (const :tag "Direct 8-bit character input" 0)
3520 (const :tag "Assume top bit is parity and ignore" nil))
3522 :link '(custom-manual "Single-Byte European Support")
3525 (defcustom read-mail-command 'rmail
3526 "*Your preference for a mail reading package.
3527 This is used by some keybindings which support reading mail."
3528 :type '(choice (function-item rmail)
3529 (function-item gnus)
3530 (function-item mh-rmail)
3531 (function :tag "Other"))
3535 (defcustom mail-user-agent 'sendmail-user-agent
3536 "*Your preference for a mail composition package.
3537 Various Emacs Lisp packages (e.g. reporter) require you to compose an
3538 outgoing email message. This variable lets you specify which
3539 mail-sending package you prefer.
3541 Valid values include:
3543 `sendmail-user-agent' -- use the default Emacs Mail package
3544 `mh-e-user-agent' -- use the Emacs interface to the MH mail system
3545 `message-user-agent' -- use the GNUS mail sending package
3547 Additional valid symbols may be available; check with the author of
3548 your package for details."
3549 :type '(radio (function-item :tag "Default Emacs mail"
3551 sendmail-user-agent)
3552 (function-item :tag "Emacs interface to MH"
3555 (function-item :tag "Gnus mail sending package"
3558 (function :tag "Other"))
3561 (defun define-mail-user-agent (symbol composefunc sendfunc
3562 &optional abortfunc hookvar)
3563 "Define a symbol to identify a mail-sending package for `mail-user-agent'.
3565 SYMBOL can be any Lisp symbol. Its function definition and/or
3566 value as a variable do not matter for this usage; we use only certain
3567 properties on its property list, to encode the rest of the arguments.
3569 COMPOSEFUNC is program callable function that composes an outgoing
3570 mail message buffer. This function should set up the basics of the
3571 buffer without requiring user interaction. It should populate the
3572 standard mail headers, leaving the `to:' and `subject:' headers blank
3575 COMPOSEFUNC should accept several optional arguments--the same
3576 arguments that `compose-mail' takes. See that function's documentation.
3578 SENDFUNC is the command a user would run to send the message.
3580 Optional ABORTFUNC is the command a user would run to abort the
3581 message. For mail packages that don't have a separate abort function,
3582 this can be `kill-buffer' (the equivalent of omitting this argument).
3584 Optional HOOKVAR is a hook variable that gets run before the message
3585 is actually sent. Callers that use the `mail-user-agent' may
3586 install a hook function temporarily on this hook variable.
3587 If HOOKVAR is nil, `mail-send-hook' is used.
3589 The properties used on SYMBOL are `composefunc', `sendfunc',
3590 `abortfunc', and `hookvar'."
3591 (put symbol 'composefunc composefunc)
3592 (put symbol 'sendfunc sendfunc)
3593 (put symbol 'abortfunc (or abortfunc 'kill-buffer))
3594 (put symbol 'hookvar (or hookvar 'mail-send-hook)))
3596 (define-mail-user-agent 'sendmail-user-agent
3597 'sendmail-user-agent-compose
3598 'mail-send-and-exit)
3600 (defun rfc822-goto-eoh ()
3601 ;; Go to header delimiter line in a mail message, following RFC822 rules
3602 (goto-char (point-min))
3603 (while (looking-at "^[^: \n]+:\\|^[ \t]")
3607 (defun sendmail-user-agent-compose (&optional to subject other-headers continue
3608 switch-function yank-action
3611 (let ((special-display-buffer-names nil)
3612 (special-display-regexps nil)
3613 (same-window-buffer-names nil)
3614 (same-window-regexps nil))
3615 (funcall switch-function "*mail*")))
3616 (let ((cc (cdr (assoc-ignore-case "cc" other-headers)))
3617 (in-reply-to (cdr (assoc-ignore-case "in-reply-to" other-headers)))
3618 (body (cdr (assoc-ignore-case "body" other-headers))))
3619 (or (mail continue to subject in-reply-to cc yank-action send-actions)
3621 (error "Message aborted"))
3624 (while other-headers
3625 (unless (member-ignore-case (car (car other-headers))
3626 '("in-reply-to" "cc" "body"))
3627 (insert (car (car other-headers)) ": "
3628 (cdr (car other-headers)) "\n"))
3629 (setq other-headers (cdr other-headers)))
3635 (define-mail-user-agent 'mh-e-user-agent
3636 'mh-smail-batch 'mh-send-letter 'mh-fully-kill-draft
3637 'mh-before-send-letter-hook)
3639 (defun compose-mail (&optional to subject other-headers continue
3640 switch-function yank-action send-actions)
3641 "Start composing a mail message to send.
3642 This uses the user's chosen mail composition package
3643 as selected with the variable `mail-user-agent'.
3644 The optional arguments TO and SUBJECT specify recipients
3645 and the initial Subject field, respectively.
3647 OTHER-HEADERS is an alist specifying additional
3648 header fields. Elements look like (HEADER . VALUE) where both
3649 HEADER and VALUE are strings.
3651 CONTINUE, if non-nil, says to continue editing a message already
3654 SWITCH-FUNCTION, if non-nil, is a function to use to
3655 switch to and display the buffer used for mail composition.
3657 YANK-ACTION, if non-nil, is an action to perform, if and when necessary,
3658 to insert the raw text of the message being replied to.
3659 It has the form (FUNCTION . ARGS). The user agent will apply
3660 FUNCTION to ARGS, to insert the raw text of the original message.
3661 \(The user agent will also run `mail-citation-hook', *after* the
3662 original text has been inserted in this way.)
3664 SEND-ACTIONS is a list of actions to call when the message is sent.
3665 Each action has the form (FUNCTION . ARGS)."
3667 (list nil nil nil current-prefix-arg))
3668 (let ((function (get mail-user-agent 'composefunc)))
3669 (funcall function to subject other-headers continue
3670 switch-function yank-action send-actions)))
3672 (defun compose-mail-other-window (&optional to subject other-headers continue
3673 yank-action send-actions)
3674 "Like \\[compose-mail], but edit the outgoing message in another window."
3676 (list nil nil nil current-prefix-arg))
3677 (compose-mail to subject other-headers continue
3678 'switch-to-buffer-other-window yank-action send-actions))
3681 (defun compose-mail-other-frame (&optional to subject other-headers continue
3682 yank-action send-actions)
3683 "Like \\[compose-mail], but edit the outgoing message in another frame."
3685 (list nil nil nil current-prefix-arg))
3686 (compose-mail to subject other-headers continue
3687 'switch-to-buffer-other-frame yank-action send-actions))
3689 (defvar set-variable-value-history nil
3690 "History of values entered with `set-variable'.")
3692 (defun set-variable (var val)
3693 "Set VARIABLE to VALUE. VALUE is a Lisp object.
3694 When using this interactively, enter a Lisp object for VALUE.
3695 If you want VALUE to be a string, you must surround it with doublequotes.
3696 VALUE is used literally, not evaluated.
3698 If VARIABLE has a `variable-interactive' property, that is used as if
3699 it were the arg to `interactive' (which see) to interactively read VALUE.
3701 If VARIABLE has been defined with `defcustom', then the type information
3702 in the definition is used to check that VALUE is valid."
3704 (let* ((default-var (variable-at-point))
3705 (var (if (symbolp default-var)
3706 (read-variable (format "Set variable (default %s): " default-var)
3708 (read-variable "Set variable: ")))
3709 (minibuffer-help-form '(describe-variable var))
3710 (prop (get var 'variable-interactive))
3711 (prompt (format "Set %s to value: " var))
3713 ;; Use VAR's `variable-interactive' property
3714 ;; as an interactive spec for prompting.
3715 (call-interactively `(lambda (arg)
3719 (read-string prompt nil
3720 'set-variable-value-history)))))
3723 (let ((type (get var 'custom-type)))
3725 ;; Match with custom type.
3727 (setq type (widget-convert type))
3728 (unless (widget-apply type :match val)
3729 (error "Value `%S' does not match type %S of %S"
3730 val (car type) var))))
3733 ;; Define the major mode for lists of completions.
3735 (defvar completion-list-mode-map nil
3736 "Local map for completion list buffers.")
3737 (or completion-list-mode-map
3738 (let ((map (make-sparse-keymap)))
3739 (define-key map [mouse-2] 'mouse-choose-completion)
3740 (define-key map [down-mouse-2] nil)
3741 (define-key map "\C-m" 'choose-completion)
3742 (define-key map "\e\e\e" 'delete-completion-window)
3743 (define-key map [left] 'previous-completion)
3744 (define-key map [right] 'next-completion)
3745 (setq completion-list-mode-map map)))
3747 ;; Completion mode is suitable only for specially formatted data.
3748 (put 'completion-list-mode 'mode-class 'special)
3750 (defvar completion-reference-buffer nil
3751 "Record the buffer that was current when the completion list was requested.
3752 This is a local variable in the completion list buffer.
3753 Initial value is nil to avoid some compiler warnings.")
3755 (defvar completion-no-auto-exit nil
3756 "Non-nil means `choose-completion-string' should never exit the minibuffer.
3757 This also applies to other functions such as `choose-completion'
3758 and `mouse-choose-completion'.")
3760 (defvar completion-base-size nil
3761 "Number of chars at beginning of minibuffer not involved in completion.
3762 This is a local variable in the completion list buffer
3763 but it talks about the buffer in `completion-reference-buffer'.
3764 If this is nil, it means to compare text to determine which part
3765 of the tail end of the buffer's text is involved in completion.")
3767 (defun delete-completion-window ()
3768 "Delete the completion list window.
3769 Go to the window from which completion was requested."
3771 (let ((buf completion-reference-buffer))
3772 (if (one-window-p t)
3773 (if (window-dedicated-p (selected-window))
3774 (delete-frame (selected-frame)))
3775 (delete-window (selected-window))
3776 (if (get-buffer-window buf)
3777 (select-window (get-buffer-window buf))))))
3779 (defun previous-completion (n)
3780 "Move to the previous item in the completion list."
3782 (next-completion (- n)))
3784 (defun next-completion (n)
3785 "Move to the next item in the completion list.
3786 With prefix argument N, move N items (negative N means move backward)."
3788 (while (and (> n 0) (not (eobp)))
3789 (let ((prop (get-text-property (point) 'mouse-face))
3791 ;; If in a completion, move to the end of it.
3793 (goto-char (next-single-property-change (point) 'mouse-face nil end)))
3794 ;; Move to start of next one.
3795 (goto-char (next-single-property-change (point) 'mouse-face nil end)))
3797 (while (and (< n 0) (not (bobp)))
3798 (let ((prop (get-text-property (1- (point)) 'mouse-face))
3800 ;; If in a completion, move to the start of it.
3802 (goto-char (previous-single-property-change
3803 (point) 'mouse-face nil end)))
3804 ;; Move to end of the previous completion.
3805 (goto-char (previous-single-property-change (point) 'mouse-face nil end))
3806 ;; Move to the start of that one.
3807 (goto-char (previous-single-property-change (point) 'mouse-face nil end)))
3810 (defun choose-completion ()
3811 "Choose the completion that point is in or next to."
3813 (let (beg end completion (buffer completion-reference-buffer)
3814 (base-size completion-base-size))
3815 (if (and (not (eobp)) (get-text-property (point) 'mouse-face))
3816 (setq end (point) beg (1+ (point))))
3817 (if (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face))
3818 (setq end (1- (point)) beg (point)))
3820 (error "No completion here"))
3821 (setq beg (previous-single-property-change beg 'mouse-face))
3822 (setq end (or (next-single-property-change end 'mouse-face) (point-max)))
3823 (setq completion (buffer-substring beg end))
3824 (let ((owindow (selected-window)))
3825 (if (and (one-window-p t 'selected-frame)
3826 (window-dedicated-p (selected-window)))
3827 ;; This is a special buffer's frame
3828 (iconify-frame (selected-frame))
3829 (or (window-dedicated-p (selected-window))
3831 (select-window owindow))
3832 (choose-completion-string completion buffer base-size)))
3834 ;; Delete the longest partial match for STRING
3835 ;; that can be found before POINT.
3836 (defun choose-completion-delete-max-match (string)
3837 (let ((opoint (point))
3838 (len (min (length string)
3839 (- (point) (point-min)))))
3840 (goto-char (- (point) (length string)))
3841 (if completion-ignore-case
3842 (setq string (downcase string)))
3843 (while (and (> len 0)
3844 (let ((tail (buffer-substring (point)
3846 (if completion-ignore-case
3847 (setq tail (downcase tail)))
3848 (not (string= tail (substring string 0 len)))))
3853 ;; Switch to BUFFER and insert the completion choice CHOICE.
3854 ;; BASE-SIZE, if non-nil, says how many characters of BUFFER's text
3855 ;; to keep. If it is nil, use choose-completion-delete-max-match instead.
3857 ;; If BUFFER is the minibuffer, exit the minibuffer
3858 ;; unless it is reading a file name and CHOICE is a directory,
3859 ;; or completion-no-auto-exit is non-nil.
3860 (defun choose-completion-string (choice &optional buffer base-size)
3861 (let ((buffer (or buffer completion-reference-buffer))
3862 (mini-p (string-match "\\` \\*Minibuf-[0-9]+\\*\\'" (buffer-name buffer))))
3863 ;; If BUFFER is a minibuffer, barf unless it's the currently
3864 ;; active minibuffer.
3866 (or (not (active-minibuffer-window))
3868 (window-buffer (active-minibuffer-window))))))
3869 (error "Minibuffer is not active for completion")
3870 ;; Insert the completion into the buffer where completion was requested.
3873 (delete-region (+ base-size (if mini-p
3874 (minibuffer-prompt-end)
3877 (choose-completion-delete-max-match choice))
3879 (remove-text-properties (- (point) (length choice)) (point)
3881 ;; Update point in the window that BUFFER is showing in.
3882 (let ((window (get-buffer-window buffer t)))
3883 (set-window-point window (point)))
3884 ;; If completing for the minibuffer, exit it with this choice.
3885 (and (not completion-no-auto-exit)
3886 (equal buffer (window-buffer (minibuffer-window)))
3887 minibuffer-completion-table
3888 ;; If this is reading a file name, and the file name chosen
3889 ;; is a directory, don't exit the minibuffer.
3890 (if (and (eq minibuffer-completion-table 'read-file-name-internal)
3891 (file-directory-p (field-string (point-max))))
3892 (select-window (active-minibuffer-window))
3893 (exit-minibuffer))))))
3895 (defun completion-list-mode ()
3896 "Major mode for buffers showing lists of possible completions.
3897 Type \\<completion-list-mode-map>\\[choose-completion] in the completion list\
3898 to select the completion near point.
3899 Use \\<completion-list-mode-map>\\[mouse-choose-completion] to select one\
3902 (kill-all-local-variables)
3903 (use-local-map completion-list-mode-map)
3904 (setq mode-name "Completion List")
3905 (setq major-mode 'completion-list-mode)
3906 (make-local-variable 'completion-base-size)
3907 (setq completion-base-size nil)
3908 (run-hooks 'completion-list-mode-hook))
3910 (defvar completion-setup-hook nil
3911 "Normal hook run at the end of setting up a completion list buffer.
3912 When this hook is run, the current buffer is the one in which the
3913 command to display the completion list buffer was run.
3914 The completion list buffer is available as the value of `standard-output'.")
3916 ;; This function goes in completion-setup-hook, so that it is called
3917 ;; after the text of the completion list buffer is written.
3919 (defun completion-setup-function ()
3921 (let ((mainbuf (current-buffer)))
3922 (set-buffer standard-output)
3923 (completion-list-mode)
3924 (make-local-variable 'completion-reference-buffer)
3925 (setq completion-reference-buffer mainbuf)
3926 (if (eq minibuffer-completion-table 'read-file-name-internal)
3927 ;; For file name completion,
3928 ;; use the number of chars before the start of the
3929 ;; last file name component.
3930 (setq completion-base-size
3932 (set-buffer mainbuf)
3933 (goto-char (point-max))
3934 (skip-chars-backward (format "^%c" directory-sep-char))
3935 (- (point) (minibuffer-prompt-end))))
3936 ;; Otherwise, in minibuffer, the whole input is being completed.
3938 (if (string-match "\\` \\*Minibuf-[0-9]+\\*\\'"
3939 (buffer-name mainbuf))
3940 (setq completion-base-size 0))))
3941 (goto-char (point-min))
3942 (if (display-mouse-p)
3943 (insert (substitute-command-keys
3944 "Click \\[mouse-choose-completion] on a completion to select it.\n")))
3945 (insert (substitute-command-keys
3946 "In this buffer, type \\[choose-completion] to \
3947 select the completion near point.\n\n")))))
3949 (add-hook 'completion-setup-hook 'completion-setup-function)
3951 (define-key minibuffer-local-completion-map [prior]
3952 'switch-to-completions)
3953 (define-key minibuffer-local-must-match-map [prior]
3954 'switch-to-completions)
3955 (define-key minibuffer-local-completion-map "\M-v"
3956 'switch-to-completions)
3957 (define-key minibuffer-local-must-match-map "\M-v"
3958 'switch-to-completions)
3960 (defun switch-to-completions ()
3961 "Select the completion list window."
3963 ;; Make sure we have a completions window.
3964 (or (get-buffer-window "*Completions*")
3965 (minibuffer-completion-help))
3966 (let ((window (get-buffer-window "*Completions*")))
3968 (select-window window)
3969 (goto-char (point-min))
3970 (search-forward "\n\n")
3973 ;; Support keyboard commands to turn on various modifiers.
3975 ;; These functions -- which are not commands -- each add one modifier
3976 ;; to the following event.
3978 (defun event-apply-alt-modifier (ignore-prompt)
3979 "Add the Alt modifier to the following event.
3980 For example, type \\[event-apply-alt-modifier] & to enter Alt-&."
3981 (vector (event-apply-modifier (read-event) 'alt 22 "A-")))
3982 (defun event-apply-super-modifier (ignore-prompt)
3983 "Add the Super modifier to the following event.
3984 For example, type \\[event-apply-super-modifier] & to enter Super-&."
3985 (vector (event-apply-modifier (read-event) 'super 23 "s-")))
3986 (defun event-apply-hyper-modifier (ignore-prompt)
3987 "Add the Hyper modifier to the following event.
3988 For example, type \\[event-apply-hyper-modifier] & to enter Hyper-&."
3989 (vector (event-apply-modifier (read-event) 'hyper 24 "H-")))
3990 (defun event-apply-shift-modifier (ignore-prompt)
3991 "Add the Shift modifier to the following event.
3992 For example, type \\[event-apply-shift-modifier] & to enter Shift-&."
3993 (vector (event-apply-modifier (read-event) 'shift 25 "S-")))
3994 (defun event-apply-control-modifier (ignore-prompt)
3995 "Add the Ctrl modifier to the following event.
3996 For example, type \\[event-apply-control-modifier] & to enter Ctrl-&."
3997 (vector (event-apply-modifier (read-event) 'control 26 "C-")))
3998 (defun event-apply-meta-modifier (ignore-prompt)
3999 "Add the Meta modifier to the following event.
4000 For example, type \\[event-apply-meta-modifier] & to enter Meta-&."
4001 (vector (event-apply-modifier (read-event) 'meta 27 "M-")))
4003 (defun event-apply-modifier (event symbol lshiftby prefix)
4004 "Apply a modifier flag to event EVENT.
4005 SYMBOL is the name of this modifier, as a symbol.
4006 LSHIFTBY is the numeric value of this modifier, in keyboard events.
4007 PREFIX is the string that represents this modifier in an event type symbol."
4009 (cond ((eq symbol 'control)
4010 (if (and (<= (downcase event) ?z)
4011 (>= (downcase event) ?a))
4012 (- (downcase event) ?a -1)
4013 (if (and (<= (downcase event) ?Z)
4014 (>= (downcase event) ?A))
4015 (- (downcase event) ?A -1)
4016 (logior (lsh 1 lshiftby) event))))
4018 (if (and (<= (downcase event) ?z)
4019 (>= (downcase event) ?a))
4021 (logior (lsh 1 lshiftby) event)))
4023 (logior (lsh 1 lshiftby) event)))
4024 (if (memq symbol (event-modifiers event))
4026 (let ((event-type (if (symbolp event) event (car event))))
4027 (setq event-type (intern (concat prefix (symbol-name event-type))))
4030 (cons event-type (cdr event)))))))
4032 (define-key function-key-map [?\C-x ?@ ?h] 'event-apply-hyper-modifier)
4033 (define-key function-key-map [?\C-x ?@ ?s] 'event-apply-super-modifier)
4034 (define-key function-key-map [?\C-x ?@ ?m] 'event-apply-meta-modifier)
4035 (define-key function-key-map [?\C-x ?@ ?a] 'event-apply-alt-modifier)
4036 (define-key function-key-map [?\C-x ?@ ?S] 'event-apply-shift-modifier)
4037 (define-key function-key-map [?\C-x ?@ ?c] 'event-apply-control-modifier)
4039 ;;;; Keypad support.
4041 ;;; Make the keypad keys act like ordinary typing keys. If people add
4042 ;;; bindings for the function key symbols, then those bindings will
4043 ;;; override these, so this shouldn't interfere with any existing
4046 ;; Also tell read-char how to handle these keys.
4048 (lambda (keypad-normal)
4049 (let ((keypad (nth 0 keypad-normal))
4050 (normal (nth 1 keypad-normal)))
4051 (put keypad 'ascii-character normal)
4052 (define-key function-key-map (vector keypad) (vector normal))))
4053 '((kp-0 ?0) (kp-1 ?1) (kp-2 ?2) (kp-3 ?3) (kp-4 ?4)
4054 (kp-5 ?5) (kp-6 ?6) (kp-7 ?7) (kp-8 ?8) (kp-9 ?9)
4067 ;;;; forking a twin copy of a buffer.
4070 (defvar clone-buffer-hook nil
4071 "Normal hook to run in the new buffer at the end of `clone-buffer'.")
4073 (defun clone-process (process &optional newname)
4074 "Create a twin copy of PROCESS.
4075 If NEWNAME is nil, it defaults to PROCESS' name;
4076 NEWNAME is modified by adding or incrementing <N> at the end as necessary.
4077 If PROCESS is associated with a buffer, the new process will be associated
4078 with the current buffer instead.
4079 Returns nil if PROCESS has already terminated."
4080 (setq newname (or newname (process-name process)))
4081 (if (string-match "<[0-9]+>\\'" newname)
4082 (setq newname (substring newname 0 (match-beginning 0))))
4083 (when (memq (process-status process) '(run stop open))
4084 (let* ((process-connection-type (process-tty-name process))
4085 (old-kwoq (process-kill-without-query process nil))
4087 (if (memq (process-status process) '(open))
4088 (apply 'open-network-stream newname
4089 (if (process-buffer process) (current-buffer))
4090 (process-contact process))
4091 (apply 'start-process newname
4092 (if (process-buffer process) (current-buffer))
4093 (process-command process)))))
4094 (process-kill-without-query new-process old-kwoq)
4095 (process-kill-without-query process old-kwoq)
4096 (set-process-inherit-coding-system-flag
4097 new-process (process-inherit-coding-system-flag process))
4098 (set-process-filter new-process (process-filter process))
4099 (set-process-sentinel new-process (process-sentinel process))
4102 ;; things to maybe add (currently partly covered by `funcall mode':
4105 (defun clone-buffer (&optional newname display-flag)
4106 "Create a twin copy of the current buffer.
4107 If NEWNAME is nil, it defaults to the current buffer's name;
4108 NEWNAME is modified by adding or incrementing <N> at the end as necessary.
4110 If DISPLAY-FLAG is non-nil, the new buffer is shown with `pop-to-buffer'.
4111 This runs the normal hook `clone-buffer-hook' in the new buffer
4112 after it has been set up properly in other respects."
4113 (interactive (list (if current-prefix-arg (read-string "Name: "))
4115 (if buffer-file-name
4116 (error "Cannot clone a file-visiting buffer"))
4117 (if (get major-mode 'no-clone)
4118 (error "Cannot clone a buffer in %s mode" mode-name))
4119 (setq newname (or newname (buffer-name)))
4120 (if (string-match "<[0-9]+>\\'" newname)
4121 (setq newname (substring newname 0 (match-beginning 0))))
4122 (let ((buf (current-buffer))
4126 (mk (if mark-active (mark t)))
4127 (modified (buffer-modified-p))
4129 (lvars (buffer-local-variables))
4130 (process (get-buffer-process (current-buffer)))
4131 (new (generate-new-buffer (or newname (buffer-name)))))
4134 (with-current-buffer new
4135 (insert-buffer-substring buf)))
4136 (with-current-buffer new
4137 (narrow-to-region ptmin ptmax)
4139 (if mk (set-mark mk))
4140 (set-buffer-modified-p modified)
4142 ;; Clone the old buffer's process, if any.
4143 (when process (clone-process process))
4145 ;; Now set up the major mode.
4148 ;; Set up other local variables.
4150 (condition-case () ;in case var is read-only
4153 (set (make-local-variable (car v)) (cdr v)))
4157 ;; Run any hooks (typically set up by the major mode
4158 ;; for cloning to work properly).
4159 (run-hooks 'clone-buffer-hook))
4160 (if display-flag (pop-to-buffer new))
4164 (defun clone-indirect-buffer (newname display-flag &optional norecord)
4165 "Create an indirect buffer that is a twin copy of the current buffer.
4167 Give the indirect buffer name NEWNAME. Interactively, read NEW-NAME
4168 from the minibuffer when invoked with a prefix arg. If NEWNAME is nil
4169 or if not called with a prefix arg, NEWNAME defaults to the current
4170 buffer's name. The name is modified by adding a `<N>' suffix to it
4171 or by incrementing the N in an existing suffix.
4173 DISPLAY-FLAG non-nil means show the new buffer with `pop-to-buffer'.
4174 This is always done when called interactively.
4176 Optional last arg NORECORD non-nil means do not put this buffer at the
4177 front of the list of recently selected ones."
4178 (interactive (list (if current-prefix-arg
4179 (read-string "BName of indirect buffer: "))
4181 (setq newname (or newname (buffer-name)))
4182 (if (string-match "<[0-9]+>\\'" newname)
4183 (setq newname (substring newname 0 (match-beginning 0))))
4184 (let* ((name (generate-new-buffer-name newname))
4185 (buffer (make-indirect-buffer (current-buffer) name t)))
4187 (pop-to-buffer buffer))
4191 (defun clone-indirect-buffer-other-window (buffer &optional norecord)
4192 "Create an indirect buffer that is a twin copy of BUFFER.
4193 Select the new buffer in another window.
4194 Optional second arg NORECORD non-nil means do not put this buffer at
4195 the front of the list of recently selected ones."
4196 (interactive "bClone buffer in other window: ")
4197 (let ((popup-windows t))
4199 (clone-indirect-buffer nil t norecord)))
4201 (define-key ctl-x-4-map "c" 'clone-indirect-buffer-other-window)
4206 (defconst syntax-code-table
4208 (?- . 0) ;whitespace
4209 (?. . 1) ;punctuation
4212 (?\( . 4) ;open parenthesis
4213 (?\) . 5) ;close parenthesis
4214 (?\' . 6) ;expression prefix
4215 (?\" . 7) ;string quote
4216 (?$ . 8) ;paired delimiter
4218 (?/ . 10) ;character quote
4219 (?< . 11) ;comment start
4220 (?> . 12) ;comment end
4222 (nil . 14) ;comment fence
4223 (nil . 15)) ;string fence
4224 "Alist of pairs (CHAR . CODE) mapping characters to syntax codes.
4225 CHAR is a character that is allowed as first char in the string
4226 specifying the syntax when calling `modify-syntax-entry'. CODE is the
4227 corresponing syntax code as it is stored in a syntax cell, and
4228 can be used as value of a `syntax-table' property..")
4230 (defconst syntax-flag-table
4231 '((?1 . #b10000000000000000)
4232 (?2 . #b100000000000000000)
4233 (?3 . #b1000000000000000000)
4234 (?4 . #b10000000000000000000)
4235 (?p . #b100000000000000000000)
4236 (?b . #b1000000000000000000000)
4237 (?n . #b10000000000000000000000))
4238 "Alist of pairs (CHAR . FLAG) mapping characters to syntax flags.
4239 CHAR is a character that is allowed as second or following character
4240 in the string argument to `modify-syntax-entry' specifying the syntax.
4241 FLAG is the corresponding syntax flag value that is stored in a
4244 (defun string-to-syntax (string)
4245 "Convert a syntax specification STRING into syntax cell form.
4246 STRING should be a string as it is allowed as argument of
4247 `modify-syntax-entry'. Value is the equivalent cons cell
4248 \(CODE . MATCHING-CHAR) that can be used as value of a `syntax-table'
4250 (let* ((first-char (aref string 0))
4251 (code (or (cdr (assq first-char syntax-code-table))
4252 (error "Invalid syntax specification `%s'" string)))
4253 (length (length string))
4256 ;; Determine the matching character, if any.
4257 (when (and (> length 1)
4258 (memq first-char '(?\( ?\))))
4259 (setq matching-char (aref string i)
4261 ;; Add any flags to the syntax code.
4263 (let ((flag (or (assq (aref string i) syntax-flag-table)
4264 (error "Invalid syntax flag in `%s'" string))))
4265 (setq code (logior flag code))
4268 (cons code matching-char)))
4270 ;;; simple.el ends here