| blob | 74821ae31169fbd972edbeecc5963836a4b7f0c7 |
1 ;;; simple.el --- basic editing commands for Emacs
3 ;; Copyright (C) 1985, 86, 87, 93, 94, 95, 96, 97, 98, 99, 2000, 2001
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)
11 ;; any later version.
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.
23 ;;; Commentary:
25 ;; A grab-bag of basic Emacs commands not specifically related to some
26 ;; major mode or to file-handling.
28 ;;; Code:
37 "Killing and yanking commands"
41 "Highlight (un)matching of parens and expressions."
46 "Major mode not specialized for anything in particular.
47 Other major modes are defined by comparison with this one."
51 ;; Making and deleting lines.
54 "Insert a newline, and move to left margin of the new line if it's blank.
55 The newline is marked with the text-property `hard'.
56 With ARG, insert that many newlines.
57 In Auto Fill mode, if no numeric arg, break the preceding line if it's long."
60 ;; Inserting a newline at the end of a line produces better redisplay in
61 ;; try_window_id than inserting at the beginning of a line, and the textual
62 ;; result is the same. So, if we're at beginning of line, pretend to be at
63 ;; the end of the previous line.
66 ;; Make sure no functions want to be told about
67 ;; the range of the changes.
70 ;; Make sure there are no markers here.
73 ;; Make sure no text properties want to know
74 ;; where the change was.
79 ;; Make sure the newline before point isn't intangible.
81 ;; Make sure the newline before point isn't read-only.
83 ;; Make sure the newline before point isn't invisible.
85 ;; Make sure the newline before point has the same
86 ;; properties as the char before it (if any).
93 ;; Call self-insert so that auto-fill, abbrev expansion etc. happens.
94 ;; Set last-command-char to tell self-insert what to insert.
96 ;; Don't auto-fill if we have a numeric argument.
97 ;; Also not if flag is true (it would fill wrong line);
98 ;; there is no need to since we're at BOL.
102 ;; If we get an error in self-insert-command, put point at right place.
104 ;; Even if we did *not* get an error, keep that forward-char;
105 ;; all further processing should apply to the newline that the user
106 ;; thinks he inserted.
108 ;; Mark the newline(s) `hard'.
112 ;; If the newline leaves the previous line blank,
113 ;; and we have a left margin, delete that from the blank line.
121 ;; Indent the line after the newline, except in one case:
122 ;; when we added the newline at the beginning of a line
123 ;; which starts a page.
126 nil)
131 ;; If rear-nonsticky is not "t", add 'hard to rear-nonsticky list
137 "Insert a newline and leave point before it.
138 If there is a fill prefix and/or a left-margin, insert them on the new line
139 if the line would have been blank.
140 With arg N, insert N newlines."
145 ;; Don't expand an abbrev before point.
159 "Split current line, moving portion beyond point vertically down."
169 "Join this line to previous and fix up whitespace at join.
170 If there is a fill prefix, delete it from the beginning of this line.
171 With argument, join this line to following line."
178 ;; If the second line started with the fill prefix,
179 ;; delete the prefix.
191 "On blank line, delete all surrounding blank lines, leaving just one.
192 On isolated blank line, delete that one.
193 On nonblank line, delete any immediately following blank lines."
199 ;; Set singleblank if there is just one blank line here.
206 ;; Delete preceding blank lines, and this one too if it's the only one.
215 ;; Delete following blank lines, unless the current line is blank
216 ;; and there are no following blank lines.
225 ;; Handle the special case where point is followed by newline and eob.
226 ;; Delete the line, leaving point at eob.
231 "Delete all the trailing whitespace across the current buffer.
232 All whitespace after the last non-whitespace character in a line is deleted.
234 A formfeed is not considered whitespace by this function."
241 ;; Don't delete formfeeds, even if they are considered whitespace.
248 "Insert a newline, then indent according to major mode.
249 Indentation is done using the value of `indent-line-function'.
250 In programming language modes, this is the same as TAB.
251 In some text modes, where TAB inserts a tab, this command indents to the
252 column specified by the function `current-left-margin'."
259 "Reindent current line, insert newline, then indent the new line.
260 Indentation of both lines is done according to the current major mode,
261 which means calling the current value of `indent-line-function'.
262 In programming language modes, this is the same as TAB.
263 In some text modes, where TAB inserts a tab, this indents to the
264 column specified by the function `current-left-margin'."
268 ;; Be careful to insert the newline before indenting the line.
269 ;; Otherwise, the indentation might be wrong.
277 "Read next input character and insert it.
278 This is useful for inserting control characters.
280 If the first character you type after this command is an octal digit,
281 you should type a sequence of octal digits which specify a character code.
282 Any nondigit terminates the sequence. If the terminator is a RET,
283 it is discarded; any other terminator is used itself as input.
284 The variable `read-quoted-char-radix' specifies the radix for this feature;
285 set it to 10 or 16 to use decimal or hex instead of octal.
287 In overwrite mode, this function inserts the character anyway, and
288 does not handle octal digits specially. This means that if you use
289 overwrite as your normal editing mode, you can use this function to
290 insert characters when necessary.
292 In binary overwrite mode, this function does overwrite, and octal
293 digits are interpreted as a character code. This is intended to be
294 useful for editing binary files."
300 ;; Assume character codes 0240 - 0377 stand for characters in some
301 ;; single-byte character set, and convert them to Emacs
302 ;; characters.
315 "Move forward ARG lines and position at first nonblank character."
321 "Move backward ARG lines and position at first nonblank character."
327 "Move point to the first non-whitespace character on this line."
333 "Fixup white space between objects around point.
334 Leave one space or none, according to the context."
341 nil
345 "Delete all spaces and tabs around point.
346 If BACKWARD-ONLY is non-nil, only delete spaces before point."
351 orig-pos
360 "Delete all spaces and tabs around point, leaving one space."
375 "Move point to the beginning of the buffer; leave mark at previous position.
376 With arg N, put point N/10 of the way from the beginning.
378 If the buffer is narrowed, this command uses the beginning and size
379 of the accessible part of the buffer.
381 Don't use this command in Lisp programs!
382 \(goto-char (point-min)) is faster and avoids clobbering the mark."
389 ;; Avoid overflow for large buffer sizes!
397 "Move point to the end of the buffer; leave mark at previous position.
398 With arg N, put point N/10 of the way from the end.
400 If the buffer is narrowed, this command uses the beginning and size
401 of the accessible part of the buffer.
403 Don't use this command in Lisp programs!
404 \(goto-char (point-max)) is faster and avoids clobbering the mark."
411 ;; Avoid overflow for large buffer sizes!
416 ;; If we went to a place in the middle of the buffer,
417 ;; adjust it to the beginning of a line.
420 ;; If the end of the buffer is not already on the screen,
421 ;; then scroll specially to put it near, but not at, the bottom.
426 "Put point at beginning and mark at end of buffer.
427 You probably should not use this function in Lisp programs;
428 it is usually a mistake for a Lisp function to use any subroutine
429 that uses or sets the mark."
436 ;; Counting lines, one way or another.
439 "Goto line ARG, counting from line 1 at beginning of buffer."
450 "Print number of lines and characters in the region."
456 "Print the current buffer line number and narrowed line number of point."
474 "Return number of lines between START and END.
475 This is usually the number of newlines between them,
476 but can be one more if START is not equal to END
477 and the greater of them is not at the start of a line."
493 done)))
497 "Print info on cursor position (on screen and within buffer).
498 Also describe the character after point, and give its character code
499 in octal, decimal and hex.
501 For a non-ASCII multibyte character, also give its encoding in the
502 buffer's selected coding system if the coding system encodes the
503 character safely. If the character is encoded into one byte, that
504 code is shown in hex. If the character is encoded into more than one
507 In addition, with prefix argument, show details about that character
508 in *Help* buffer. See also the command `describe-char-after'."
516 ;; Avoid overflow from multiplying by 100!
520 ""
526 pos total percent beg end col hscroll)
528 pos total percent col hscroll))
530 encoded encoding-msg)
541 char char char
543 "..."
547 ;; We show the detailed information about CHAR.
554 encoding-msg pos total percent beg end col hscroll)
559 encoding-msg pos total percent col hscroll))))))
565 m)
571 "*Value to use for `print-level' when printing value in `eval-expression'."
577 "*Value to use for `print-length' when printing value in `eval-expression'."
583 "*Non-nil means set `debug-on-error' when evaluating in `eval-expression'.
584 If nil, don't change the value of `debug-on-error'."
589 ;; We define this, rather than making `eval' interactive,
590 ;; for the sake of completion of names like eval-region, eval-current-buffer.
593 "Evaluate EVAL-EXPRESSION-ARG and print value in the echo area.
594 Value is also consed on to front of the variable `values'.
595 Optional argument EVAL-EXPRESSION-INSERT-VALUE, if non-nil, means
596 insert the result into the current buffer instead of printing it in
597 the echo area."
600 nil read-expression-map t
602 current-prefix-arg))
607 ;; Bind debug-on-error to something unique so that we can
608 ;; detect when evaled code changes it.
612 ;; If evaled code has changed the value of debug-on-error,
613 ;; propagate that change to the global binding.
623 "Prompting with PROMPT, let user edit COMMAND and eval result.
624 COMMAND is a Lisp expression. Let user edit that expression in
625 the minibuffer, then read and evaluate the result."
628 read-expression-map t
630 ;; If command was added to command-history as a string,
631 ;; get rid of that. We want only evaluable expressions there.
635 ;; If command to be redone does not match front of history,
636 ;; add it to the history.
642 "Edit and re-evaluate last complex command, or ARGth from last.
643 A complex command is one which used the minibuffer.
644 The command is placed in the minibuffer as a Lisp form for editing.
645 The result is executed, repeating the command as changed.
646 If the command has been changed or is not the most recent previous command
647 it is added to the front of the command history.
648 You can use the minibuffer history commands \\<minibuffer-local-map>\\[next-history-element] and \\[previous-history-element]
649 to get different commands to edit and resubmit."
652 newcmd)
663 ;; If command was added to command-history as a string,
664 ;; get rid of that. We want only evaluable expressions there.
668 ;; If command to be redone does not match front of history,
669 ;; add it to the history.
676 "Default minibuffer history list.
677 This is used for all minibuffer input
680 "Non-nil when doing history operations on the variable `command-history'.
681 More generally, indicates that the history list being acted on
682 contains expressions rather than strings.
683 It is only valid if its value equals the current minibuffer depth,
690 "Text that was in this minibuffer before any history commands.
691 This is nil if there have not yet been any history commands
700 "A point-motion hook for the minibuffer, that moves point out of the prompt."
704 "*Minibuffer history variables for which matching should ignore case.
705 If a history variable is a member of this list, then the
707 commands ignore case when searching it, regardless of `case-fold-search'."
712 "Find the previous history element that matches REGEXP.
713 \(Previous history elements refer to earlier actions.)
714 With prefix argument N, search for Nth previous match.
715 If N is negative, find the next or Nth next match.
716 Normally, history elements are matched case-insensitively if
717 `case-fold-search' is non-nil, but an uppercase letter in REGEXP
718 makes the search case-sensitive.
719 See also `minibuffer-history-case-insensitive-variables'."
723 nil
724 minibuffer-local-map
725 nil
727 ;; Use the last regexp specified, by default, if input is empty.
732 regexp)
742 ;; On some systems, ignore case for file names.
744 minibuffer-history-case-insensitive-variables)
745 t
746 ;; Respect the user's setting for case-fold-search:
747 case-fold-search)
748 nil))
749 prevpos
750 match-string
751 match-offset
758 "No later matching history item"
779 next-matching-history-element))
783 "Find the next history element that matches REGEXP.
784 \(The next history element refers to a more recent action.)
785 With prefix argument N, search for Nth next match.
786 If N is negative, find the previous or Nth previous match.
787 Normally, history elements are matched case-insensitively if
788 `case-fold-search' is non-nil, but an uppercase letter in REGEXP
789 makes the search case-sensitive."
793 nil
794 minibuffer-local-map
795 nil
797 ;; Use the last regexp specified, by default, if input is empty.
801 regexp)
808 "Insert the next element of the minibuffer history into the minibuffer."
813 elt minibuffer-returned-to-present)
825 previous-history-element))
847 elt))
851 "Inserts the previous element of the minibuffer history into the minibuffer."
856 "Get next history element which completes the minibuffer before the point.
857 The contents of the minibuffer after the point are deleted, and replaced
858 by the new completion."
864 n)
865 ;; next-matching-history-element always puts us at (point-min).
866 ;; Move to the position we were at before changing the buffer contents.
867 ;; This is still sensical, because the text before point has not changed.
871 "\
872 Get previous history element which completes the minibuffer before the point.
873 The contents of the minibuffer after the point are deleted, and replaced
874 by the new completion."
878 ;; For compatibility with the old subr of the same name.
880 "Return the display width of the minibuffer prompt.
881 Return 0 if current buffer is not a mini-buffer."
882 ;; Return the width of everything before the field at the end of
883 ;; the buffer; this should be 0 for normal buffers.
886 ;Put this on C-x u, so we can force that rather than C-_ into startup msg
890 "Undo some previous changes.
891 Repeat this command to undo more changes.
892 A numeric argument serves as a repeat count.
894 In Transient Mark mode when the mark is active, only undo changes within
895 the current region. Similarly, when not in Transient Mark mode, just C-u
896 as an argument limits undo to changes within the current region."
898 ;; If we don't get all the way thru, make last-command indicate that
899 ;; for the following command.
909 ;; get rid of initial undo boundary
915 ;; Don't specify a position in the undo record for the undo command.
916 ;; Instead, undoing this should move point to where the change is.
938 ;; If we do get all the way thru, make this-command indicate that.
945 "Non-nil while performing an undo.
949 "Undo back N undo-boundaries beyond what was already undone recently.
950 Call `undo-start' to get ready to undo recent changes,
951 then call `undo-more' one or more times to undo them."
957 ;; Deep copy of a list
959 "Make a copy of undo list LIST."
965 elt))
968 "Set `pending-undo-list' to the front of the undo list.
969 The next call to `undo-more' will undo the most recently made change.
970 If BEG and END are specified, then only undo elements
971 that apply to text between BEG and END are used; other undo elements
972 are ignored. If BEG and END are nil, all undo elements are used."
978 buffer-undo-list)))
983 "Return a list of undo elements for the region START to END.
984 The elements come from `buffer-undo-list', but we keep only
985 the elements inside this region, and discard those outside this region.
986 If we find an element that crosses an edge of this region,
987 we stop and ignore all further elements."
990 undo-adjusted-markers
991 some-rejected
992 undo-elt undo-elt temp-undo-list delta)
997 ;; This is a "was unmodified" element.
998 ;; Keep it if we have kept everything thus far.
1005 ;; Don't put two nils together in the list
1019 ;; Loop down the earlier events adjusting their buffer
1020 ;; positions to reflect the fact that a change to the buffer
1021 ;; isn't being undone. We only need to process those element
1022 ;; types which undo-elt-in-region will return as being in
1023 ;; the region since only those types can ever get into the
1024 ;; output
1033 ;; (TEXT . POSITION)
1040 ;; (BEGIN . END)
1045 ;; (nil PROPERTY VALUE BEG . END)
1055 "Determine whether UNDO-ELT falls inside the region START ... END.
1056 If it crosses the edge, we return nil."
1061 t)
1063 nil)
1065 ;; (TEXT . POSITION)
1069 ;; This is a marker-adjustment element (MARKER . ADJUSTMENT).
1070 ;; See if MARKER is inside the region.
1081 ;; (nil PROPERTY VALUE BEG . END)
1086 ;; (BEGIN . END)
1091 "Test whether UNDO-ELT crosses one edge of that region START ... END.
1092 This assumes we have already decided that UNDO-ELT
1093 is not *inside* the region START...END."
1096 ;; (nil PROPERTY VALUE BEG . END)
1101 ;; (BEGIN . END)
1105 ;; Return the first affected buffer position and the delta for an undo element
1106 ;; delta is defined as the change in subsequent buffer positions if we *did*
1107 ;; the undo.
1111 ;; (TEXT . POSITION)
1114 ;; (BEGIN . END)
1121 "Return a handler for the current state to which we might want to undo.
1122 The returned handler can then be passed to `undo-revert-to-handle'."
1124 buffer-undo-list))
1127 "Revert to the state HANDLE earlier grabbed with `undo-get-handle'.
1128 This undoing is not itself undoable (aka redoable)."
1131 ;; Truncate the undo log at `handle'.
1135 ;; Make sure there's no confusion.
1138 ;; Undo it all.
1140 ;; Reset the modified cons cell to its original content.
1144 ;; Revert the undo info to what it was when we grabbed the state.
1147 \f
1155 "*Buffer name for `shell-command' and `shell-command-on-region' error output.
1156 This buffer is used when `shell-command' or 'shell-command-on-region'
1157 is run interactively. A value of nil means that output to stderr and
1161 "Execute string COMMAND in inferior shell; display output, if any.
1162 With prefix argument, insert the COMMAND's output at point.
1164 If COMMAND ends in ampersand, execute it asynchronously.
1165 The output appears in the buffer `*Async Shell Command*'.
1166 That buffer is in shell mode.
1168 Otherwise, COMMAND is executed synchronously. The output appears in
1169 the buffer `*Shell Command Output*'. If the output is short enough to
1170 display in the echo area (which is determined by the variables
1171 `resize-mini-windows' and `max-mini-window-height'), it is shown
1172 there, but it is nonetheless available in buffer `*Shell Command
1173 Output*' even though that buffer is not automatically displayed.
1175 To specify a coding system for converting non-ASCII characters
1177 before this command.
1179 Noninteractive callers can specify coding systems by binding
1180 `coding-system-for-read' and `coding-system-for-write'.
1182 The optional second argument OUTPUT-BUFFER, if non-nil,
1183 says to put the output in some other buffer.
1184 If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
1185 If OUTPUT-BUFFER is not a buffer and not nil,
1186 insert output in current buffer. (This cannot be done asynchronously.)
1187 In either case, the output is inserted after point (leaving mark after it).
1189 If the optional third argument ERROR-BUFFER is non-nil, it is a buffer
1190 or buffer name to which to direct the command's standard error output.
1191 If it is nil, error output is mingled with regular output.
1192 In an interactive call, the variable `shell-command-default-error-buffer'
1193 specifies the value of ERROR-BUFFER."
1197 current-prefix-arg
1198 shell-command-default-error-buffer))
1199 ;; Look for a handler in case default-directory is a remote file name.
1212 temporary-file-directory)))
1213 nil)))
1216 ;; We do not use -f for csh; we will not support broken use of
1217 ;; .cshrcs. Even the BSD csh manual says to use
1218 ;; "if ($?prompt) exit" before things which are not useful
1219 ;; non-interactively. Besides, if someone wants their other
1220 ;; aliases for shell commands then they can still have them.
1224 t)
1225 nil shell-command-switch command)
1232 ;; Do no formatting while reading error file,
1233 ;; because that can run a shell command, and we
1234 ;; don't want that to cause an infinite recursion.
1236 ;; Put point after the inserted errors.
1240 ;; This is like exchange-point-and-mark, but doesn't
1241 ;; activate the mark. It is cleaner to avoid activation,
1242 ;; even though the command loop would deactivate the mark
1243 ;; because we inserted text.
1247 ;; Preserve the match data in case called from a program.
1250 ;; Command ending with ampersand means asynchronous.
1254 proc)
1255 ;; Remove the ampersand.
1257 ;; If will kill a process, query first.
1270 shell-command-switch command))
1274 ))
1276 output-buffer nil error-buffer)))))))
1280 "Display MESSAGE in the echo area if possible, otherwise in a pop-up buffer.
1281 MESSAGE may be either a string or a buffer.
1283 A buffer is displayed using `display-buffer' if MESSAGE is too long for
1284 the maximum height of the echo area, as defined by `max-mini-window-height'
1285 if `resize-mini-windows' is non-nil.
1287 Returns either the string shown in the echo area, or when a pop-up
1288 buffer is used, the window used to display it.
1290 If MESSAGE is a string, then the optional argument BUFFER-NAME is the
1291 name of the buffer used to display it in the case where a pop-up buffer
1292 is used, defaulting to `*Message*'. In the case where MESSAGE is a
1293 string and it is displayed in the echo area, it is not specified whether
1294 the contents are inserted into the buffer anyway.
1296 Optional arguments NOT-THIS-WINDOW and FRAME are as for `display-buffer',
1297 and only used if a buffer is displayed."
1299 ;; Trivial case where we can use the echo area
1303 ;; Trivial case where we can just remove single trailing newline
1306 ;; General case
1309 message
1318 0
1321 (<= lines
1325 max-mini-window-height))
1327 max-mini-window-height)
1331 ;; Echo area
1337 ;; Buffer
1340 not-this-window frame))))))))
1343 ;; We have a sentinel to prevent insertion of a termination message
1344 ;; in the buffer itself.
1352 &optional output-buffer replace
1353 error-buffer)
1354 "Execute string COMMAND in inferior shell with region as input.
1355 Normally display output (if any) in temp buffer `*Shell Command Output*';
1356 Prefix arg means replace the region with it. Return the exit code of
1357 COMMAND.
1359 To specify a coding system for converting non-ASCII characters
1361 before this command. By default, the input (from the current buffer)
1362 is encoded in the same coding system that will be used to save the file,
1363 `buffer-file-coding-system'. If the output is going to replace the region,
1364 then it is decoded from that same coding system.
1366 The noninteractive arguments are START, END, COMMAND, OUTPUT-BUFFER,
1367 REPLACE, ERROR-BUFFER. Noninteractive callers can specify coding
1368 systems by binding `coding-system-for-read' and
1369 `coding-system-for-write'.
1371 If the output is short enough to display in the echo area (which is
1372 determined by the variable `max-mini-window-height' if
1373 `resize-mini-windows' is non-nil), it is shown there, but it is
1374 nonetheless available in buffer `*Shell Command Output*' even though
1375 that buffer is not automatically displayed. If there is no output, or
1376 if output is inserted in the current buffer, then `*Shell Command
1377 Output*' is deleted.
1379 If the optional fourth argument OUTPUT-BUFFER is non-nil,
1380 that says to put the output in some other buffer.
1381 If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
1382 If OUTPUT-BUFFER is not a buffer and not nil,
1383 insert output in the current buffer.
1384 In either case, the output is inserted after point (leaving mark after it).
1386 If REPLACE, the optional fifth argument, is non-nil, that means insert
1387 the output in place of text from START to END, putting point and mark
1388 around it.
1390 If optional sixth argument ERROR-BUFFER is non-nil, it is a buffer
1391 or buffer name to which to direct the command's standard error output.
1392 If it is nil, error output is mingled with regular output.
1393 In an interactive call, the variable `shell-command-default-error-buffer'
1394 specifies the value of ERROR-BUFFER."
1396 ;; Do this before calling region-beginning
1397 ;; and region-end, in case subprocess output
1398 ;; relocates them while we are in the minibuffer.
1400 nil nil nil
1402 ;; call-interactively recognizes region-beginning and
1403 ;; region-end specially, leaving them in the history.
1405 string
1406 current-prefix-arg
1407 current-prefix-arg
1408 shell-command-default-error-buffer)))
1414 temporary-file-directory)))
1415 nil))
1416 exit-status)
1420 ;; Replace specified region with output from command.
1422 ;; Don't muck with mark unless REPLACE says we should.
1429 t)
1430 nil shell-command-switch command))
1431 ;; It is rude to delete a buffer which the command is not using.
1432 ;; (let ((shell-buffer (get-buffer "*Shell Command Output*")))
1433 ;; (and shell-buffer (not (eq shell-buffer (current-buffer)))
1434 ;; (kill-buffer shell-buffer)))
1435 ;; Don't muck with mark unless REPLACE says we should.
1437 ;; No prefix argument: put the output in a temp buffer,
1438 ;; replacing its entire contents.
1444 ;; If the input is the same buffer as the output,
1445 ;; delete everything but the specified region,
1446 ;; then replace that region with the output.
1452 shell-file-name t
1455 t)
1456 nil shell-command-switch
1457 command)))
1458 ;; Clear the output buffer, then run the command with
1459 ;; output there.
1471 buffer)
1472 nil shell-command-switch command)))
1474 ;; Report the amount of output.
1476 ;; There's some output, display it
1478 ;; No output; error?
1481 "(Shell command %sed with some error output)"
1484 ;; Don't kill: there might be useful info in the undo-log.
1485 ;; (kill-buffer buffer)
1486 ))))
1494 ;; Do no formatting while reading error file,
1495 ;; because that can run a shell command, and we
1496 ;; don't want that to cause an infinite recursion.
1498 ;; Put point after the inserted errors.
1502 exit-status))
1505 "Execute shell command COMMAND and return its output as a string."
1508 standard-output
1514 (define-key map (vector meta-prefix-char t) 'universal-argument-other-key)
1515 (define-key map [switch-frame] nil)
1516 (define-key map [?\C-u] 'universal-argument-more)
1517 (define-key map [?-] 'universal-argument-minus)
1518 (define-key map [?0] 'digit-argument)
1519 (define-key map [?1] 'digit-argument)
1520 (define-key map [?2] 'digit-argument)
1521 (define-key map [?3] 'digit-argument)
1522 (define-key map [?4] 'digit-argument)
1523 (define-key map [?5] 'digit-argument)
1524 (define-key map [?6] 'digit-argument)
1525 (define-key map [?7] 'digit-argument)
1526 (define-key map [?8] 'digit-argument)
1527 (define-key map [?9] 'digit-argument)
1528 (define-key map [kp-0] 'digit-argument)
1529 (define-key map [kp-1] 'digit-argument)
1530 (define-key map [kp-2] 'digit-argument)
1531 (define-key map [kp-3] 'digit-argument)
1532 (define-key map [kp-4] 'digit-argument)
1533 (define-key map [kp-5] 'digit-argument)
1534 (define-key map [kp-6] 'digit-argument)
1535 (define-key map [kp-7] 'digit-argument)
1536 (define-key map [kp-8] 'digit-argument)
1537 (define-key map [kp-9] 'digit-argument)
1538 (define-key map [kp-subtract] 'universal-argument-minus)
1539 map)
1542 (defvar universal-argument-num-events nil
1543 "Number of argument-specifying events read by `universal-argument'.
1544 `universal-argument-other-key' uses this to discard those events
1545 from (this-command-keys), and reread only the final command.")
1547 (defun universal-argument ()
1548 "Begin a numeric argument for the following command.
1553 multiplies the argument by 4 each time.
1555 which is different in effect from any particular numeric argument.
1557 (interactive)
1558 (setq prefix-arg (list 4))
1559 (setq universal-argument-num-events (length (this-command-keys)))
1560 (setq overriding-terminal-local-map universal-argument-map))
1562 ;; A subsequent C-u means to multiply the factor by 4 if we've typed
1563 ;; nothing but C-u's; otherwise it means to terminate the prefix arg.
1564 (defun universal-argument-more (arg)
1565 (interactive "P")
1566 (if (consp arg)
1567 (setq prefix-arg (list (* 4 (car arg))))
1568 (if (eq arg '-)
1569 (setq prefix-arg (list -4))
1570 (setq prefix-arg arg)
1571 (setq overriding-terminal-local-map nil)))
1572 (setq universal-argument-num-events (length (this-command-keys))))
1574 (defun negative-argument (arg)
1575 "Begin a negative numeric argument for the next command.
1577 (interactive "P")
1578 (cond ((integerp arg)
1579 (setq prefix-arg (- arg)))
1580 ((eq arg '-)
1581 (setq prefix-arg nil))
1582 (t
1583 (setq prefix-arg '-)))
1584 (setq universal-argument-num-events (length (this-command-keys)))
1585 (setq overriding-terminal-local-map universal-argument-map))
1587 (defun digit-argument (arg)
1588 "Part of the numeric argument for the next command.
1590 (interactive "P")
1591 (let* ((char (if (integerp last-command-char)
1592 last-command-char
1593 (get last-command-char 'ascii-character)))
1595 (cond ((integerp arg)
1596 (setq prefix-arg (+ (* arg 10)
1597 (if (< arg 0) (- digit) digit))))
1598 ((eq arg '-)
1599 ;; Treat -0 as just -, so that -01 will work.
1600 (setq prefix-arg (if (zerop digit) '- (- digit))))
1601 (t
1602 (setq prefix-arg digit))))
1603 (setq universal-argument-num-events (length (this-command-keys)))
1604 (setq overriding-terminal-local-map universal-argument-map))
1606 ;; For backward compatibility, minus with no modifiers is an ordinary
1607 ;; command if digits have already been entered.
1608 (defun universal-argument-minus (arg)
1609 (interactive "P")
1610 (if (integerp arg)
1611 (universal-argument-other-key arg)
1612 (negative-argument arg)))
1614 ;; Anything else terminates the argument and is left in the queue to be
1615 ;; executed as a command.
1616 (defun universal-argument-other-key (arg)
1617 (interactive "P")
1618 (setq prefix-arg arg)
1619 (let* ((key (this-command-keys))
1620 (keylist (listify-key-sequence key)))
1621 (setq unread-command-events
1622 (append (nthcdr universal-argument-num-events keylist)
1623 unread-command-events)))
1624 (reset-this-command-lengths)
1625 (setq overriding-terminal-local-map nil))
1627 ;;;; Window system cut and paste hooks.
1629 (defvar interprogram-cut-function nil
1630 "Function to call to make a killed region available to other programs.
1632 Most window systems provide some sort of facility for cutting and
1633 pasting text between the windows of different programs.
1634 This variable holds a function that Emacs calls whenever text
1635 is put in the kill ring, to make the new kill available to other
1636 programs.
1638 The function takes one or two arguments.
1639 The first argument, TEXT, is a string containing
1640 the text which should be made available.
1644 (defvar interprogram-paste-function nil
1645 "Function to call to get text cut from other programs.
1647 Most window systems provide some sort of facility for cutting and
1648 pasting text between the windows of different programs.
1649 This variable holds a function that Emacs calls to obtain
1650 text that other programs have provided for pasting.
1652 The function should be called with no arguments. If the function
1653 returns nil, then no other program has provided such text, and the top
1654 of the Emacs kill ring should be used. If the function returns a
1655 string, that string should be put in the kill ring as the latest kill.
1657 Note that the function should return a string only if a program other
1658 than Emacs has provided a string for pasting; if Emacs provided the
1659 most recent string, the function should return nil. If it is
1660 difficult to tell whether Emacs or some other program provided the
1661 current string, it is probably good enough to return nil if the string
1662 is equal (according to `string=') to the last text Emacs provided.")
1666 ;;;; The kill ring data structure.
1668 (defvar kill-ring nil
1669 "List of killed text sequences.
1670 Since the kill ring is supposed to interact nicely with cut-and-paste
1671 facilities offered by window systems, use of this variable should
1672 interact nicely with `interprogram-cut-function' and
1673 `interprogram-paste-function'. The functions `kill-new',
1674 `kill-append', and `current-kill' are supposed to implement this
1675 interaction; you may want to use them instead of manipulating the kill
1676 ring directly.")
1678 (defcustom kill-ring-max 60
1679 "*Maximum length of kill ring before oldest elements are thrown away."
1680 :type 'integer
1681 :group 'killing)
1683 (defvar kill-ring-yank-pointer nil
1684 "The tail of the kill ring whose car is the last thing yanked.")
1686 (defun kill-new (string &optional replace)
1687 "Make STRING the latest kill in the kill ring.
1688 Set the kill-ring-yank pointer to point to it.
1689 If `interprogram-cut-function' is non-nil, apply it to STRING.
1690 Optional second argument REPLACE non-nil means that STRING will replace
1691 the front of the kill ring, rather than being added to the list."
1692 (and (fboundp 'menu-bar-update-yank-menu)
1693 (menu-bar-update-yank-menu string (and replace (car kill-ring))))
1694 (if (and replace kill-ring)
1695 (setcar kill-ring string)
1696 (setq kill-ring (cons string kill-ring))
1697 (if (> (length kill-ring) kill-ring-max)
1698 (setcdr (nthcdr (1- kill-ring-max) kill-ring) nil)))
1699 (setq kill-ring-yank-pointer kill-ring)
1700 (if interprogram-cut-function
1701 (funcall interprogram-cut-function string (not replace))))
1703 (defun kill-append (string before-p)
1704 "Append STRING to the end of the latest kill in the kill ring.
1705 If BEFORE-P is non-nil, prepend STRING to the kill.
1706 If `interprogram-cut-function' is set, pass the resulting kill to
1707 it."
1708 (kill-new (if before-p
1709 (concat string (car kill-ring))
1710 (concat (car kill-ring) string)) t))
1712 (defun current-kill (n &optional do-not-move)
1713 "Rotate the yanking point by N places, and then return that kill.
1714 If N is zero, `interprogram-paste-function' is set, and calling it
1715 returns a string, then that string is added to the front of the
1716 kill ring and returned as the latest kill.
1717 If optional arg DO-NOT-MOVE is non-nil, then don't actually move the
1718 yanking point; just return the Nth kill forward."
1719 (let ((interprogram-paste (and (= n 0)
1720 interprogram-paste-function
1721 (funcall interprogram-paste-function))))
1722 (if interprogram-paste
1723 (progn
1724 ;; Disable the interprogram cut function when we add the new
1725 ;; text to the kill ring, so Emacs doesn't try to own the
1726 ;; selection, with identical text.
1727 (let ((interprogram-cut-function nil))
1728 (kill-new interprogram-paste))
1729 interprogram-paste)
1730 (or kill-ring (error "Kill ring is empty"))
1731 (let ((ARGth-kill-element
1732 (nthcdr (mod (- n (length kill-ring-yank-pointer))
1733 (length kill-ring))
1734 kill-ring)))
1735 (or do-not-move
1736 (setq kill-ring-yank-pointer ARGth-kill-element))
1737 (car ARGth-kill-element)))))
1741 ;;;; Commands for manipulating the kill ring.
1743 (defcustom kill-read-only-ok nil
1744 "*Non-nil means don't signal an error for killing read-only text."
1745 :type 'boolean
1746 :group 'killing)
1748 (put 'text-read-only 'error-conditions
1749 '(text-read-only buffer-read-only error))
1750 (put 'text-read-only 'error-message "Text is read-only")
1752 (defun kill-region (beg end)
1753 "Kill between point and mark.
1754 The text is deleted but saved in the kill ring.
1758 If you want to append the killed region to the last killed text,
1761 If the buffer is read-only, Emacs will beep and refrain from deleting
1762 the text, but put the text in the kill ring anyway. This means that
1763 you can use the killing commands to copy text from a read-only buffer.
1765 This is the primitive for programs to kill text (as opposed to deleting it).
1766 Supply two arguments, character numbers indicating the stretch of text
1767 to be killed.
1769 If the previous command was also a kill command,
1770 the text killed this time appends to the text killed last time
1771 to make one entry in the kill ring."
1772 (interactive "r")
1773 (condition-case nil
1774 (let ((string (delete-and-extract-region beg end)))
1775 (when string ;STRING is nil if BEG = END
1776 ;; Add that string to the kill ring, one way or another.
1777 (if (eq last-command 'kill-region)
1778 (kill-append string (< end beg))
1779 (kill-new string)))
1780 (setq this-command 'kill-region))
1781 ((buffer-read-only text-read-only)
1782 ;; The code above failed because the buffer, or some of the characters
1783 ;; in the region, are read-only.
1784 ;; We should beep, in case the user just isn't aware of this.
1785 ;; However, there's no harm in putting
1786 ;; the region's text in the kill ring, anyway.
1787 (copy-region-as-kill beg end)
1788 ;; Set this-command now, so it will be set even if we get an error.
1789 (setq this-command 'kill-region)
1790 ;; This should barf, if appropriate, and give us the correct error.
1791 (if kill-read-only-ok
1792 (message "Read only text copied to kill ring")
1793 ;; Signal an error if the buffer is read-only.
1794 (barf-if-buffer-read-only)
1795 ;; If the buffer isn't read-only, the text is.
1796 (signal 'text-read-only (list (current-buffer)))))))
1798 ;; copy-region-as-kill no longer sets this-command, because it's confusing
1799 ;; to get two copies of the text when the user accidentally types M-w and
1800 ;; then corrects it with the intended C-w.
1801 (defun copy-region-as-kill (beg end)
1802 "Save the region as if killed, but don't kill it.
1803 In Transient Mark mode, deactivate the mark.
1804 If `interprogram-cut-function' is non-nil, also save the text for a window
1805 system cut and paste."
1806 (interactive "r")
1807 (if (eq last-command 'kill-region)
1808 (kill-append (buffer-substring beg end) (< end beg))
1809 (kill-new (buffer-substring beg end)))
1810 (if transient-mark-mode
1811 (setq deactivate-mark t))
1812 nil)
1814 (defun kill-ring-save (beg end)
1815 "Save the region as if killed, but don't kill it.
1816 In Transient Mark mode, deactivate the mark.
1817 If `interprogram-cut-function' is non-nil, also save the text for a window
1818 system cut and paste.
1820 If you want to append the killed line to the last killed text,
1823 This command is similar to `copy-region-as-kill', except that it gives
1824 visual feedback indicating the extent of the region being copied."
1825 (interactive "r")
1826 (copy-region-as-kill beg end)
1827 (if (interactive-p)
1828 (let ((other-end (if (= (point) beg) end beg))
1829 (opoint (point))
1830 ;; Inhibit quitting so we can make a quit here
1831 ;; look like a C-g typed as a command.
1832 (inhibit-quit t))
1833 (if (pos-visible-in-window-p other-end (selected-window))
1834 (unless transient-mark-mode
1835 ;; Swap point and mark.
1836 (set-marker (mark-marker) (point) (current-buffer))
1837 (goto-char other-end)
1838 (sit-for 1)
1839 ;; Swap back.
1840 (set-marker (mark-marker) other-end (current-buffer))
1841 (goto-char opoint)
1842 ;; If user quit, deactivate the mark
1843 ;; as C-g would as a command.
1844 (and quit-flag mark-active
1845 (deactivate-mark)))
1846 (let* ((killed-text (current-kill 0))
1847 (message-len (min (length killed-text) 40)))
1848 (if (= (point) beg)
1849 ;; Don't say "killed"; that is misleading.
1851 (substring killed-text (- message-len)))
1853 (substring killed-text 0 message-len))))))))
1855 (defun append-next-kill (&optional interactive)
1856 "Cause following command, if it kills, to append to previous kill.
1857 The argument is used for internal purposes; do not supply one."
1858 (interactive "p")
1859 ;; We don't use (interactive-p), since that breaks kbd macros.
1860 (if interactive
1861 (progn
1862 (setq this-command 'kill-region)
1863 (message "If the next command is a kill, it will append"))
1864 (setq last-command 'kill-region)))
1866 ;; Yanking.
1868 (defun yank-pop (arg)
1869 "Replace just-yanked stretch of killed text with a different stretch.
1870 This command is allowed only immediately after a `yank' or a `yank-pop'.
1871 At such a time, the region contains a stretch of reinserted
1872 previously-killed text. `yank-pop' deletes that text and inserts in its
1873 place a different stretch of killed text.
1875 With no argument, the previous kill is inserted.
1876 With argument N, insert the Nth previous kill.
1877 If N is negative, this is a more recent kill.
1879 The sequence of kills wraps around, so that after the oldest one
1880 comes the newest one."
1881 (interactive "*p")
1882 (if (not (eq last-command 'yank))
1883 (error "Previous command was not a yank"))
1884 (setq this-command 'yank)
1885 (let ((inhibit-read-only t)
1886 (before (< (point) (mark t))))
1887 (delete-region (point) (mark t))
1888 (set-marker (mark-marker) (point) (current-buffer))
1889 (let ((opoint (point)))
1890 (insert (current-kill arg))
1891 (let ((inhibit-read-only t))
1892 (remove-text-properties opoint (point) '(read-only nil))))
1893 (if before
1894 ;; This is like exchange-point-and-mark, but doesn't activate the mark.
1895 ;; It is cleaner to avoid activation, even though the command
1896 ;; loop would deactivate the mark because we inserted text.
1897 (goto-char (prog1 (mark t)
1898 (set-marker (mark-marker) (point) (current-buffer))))))
1899 nil)
1901 (defun yank (&optional arg)
1902 "Reinsert the last stretch of killed text.
1903 More precisely, reinsert the stretch of killed text most recently
1904 killed OR yanked. Put point at end, and set mark at beginning.
1905 With just C-u as argument, same but put point at beginning (and mark at end).
1906 With argument N, reinsert the Nth most recently killed stretch of killed
1907 text.
1909 (interactive "*P")
1910 ;; If we don't get all the way thru, make last-command indicate that
1911 ;; for the following command.
1912 (setq this-command t)
1913 (push-mark (point))
1914 (let ((opoint (point)))
1915 (insert (current-kill (cond
1916 ((listp arg) 0)
1917 ((eq arg '-) -1)
1918 (t (1- arg)))))
1919 (let ((inhibit-read-only t))
1920 (remove-text-properties opoint (point) '(read-only nil))))
1921 (if (consp arg)
1922 ;; This is like exchange-point-and-mark, but doesn't activate the mark.
1923 ;; It is cleaner to avoid activation, even though the command
1924 ;; loop would deactivate the mark because we inserted text.
1925 (goto-char (prog1 (mark t)
1926 (set-marker (mark-marker) (point) (current-buffer)))))
1927 ;; If we do get all the way thru, make this-command indicate that.
1928 (setq this-command 'yank)
1929 nil)
1931 (defun rotate-yank-pointer (arg)
1932 "Rotate the yanking point in the kill ring.
1933 With argument, rotate that many kills forward (or backward, if negative)."
1934 (interactive "p")
1935 (current-kill arg))
1937 ;; Some kill commands.
1939 ;; Internal subroutine of delete-char
1940 (defun kill-forward-chars (arg)
1941 (if (listp arg) (setq arg (car arg)))
1942 (if (eq arg '-) (setq arg -1))
1943 (kill-region (point) (forward-point arg)))
1945 ;; Internal subroutine of backward-delete-char
1946 (defun kill-backward-chars (arg)
1947 (if (listp arg) (setq arg (car arg)))
1948 (if (eq arg '-) (setq arg -1))
1949 (kill-region (point) (forward-point (- arg))))
1951 (defcustom backward-delete-char-untabify-method 'untabify
1952 "*The method for untabifying when deleting backward.
1953 Can be `untabify' -- turn a tab to many spaces, then delete one space;
1954 `hungry' -- delete all whitespace, both tabs and spaces;
1955 `all' -- delete all whitespace, including tabs, spaces and newlines;
1956 nil -- just delete one character."
1957 :type '(choice (const untabify) (const hungry) (const all) (const nil))
1958 :version "20.3"
1959 :group 'killing)
1961 (defun backward-delete-char-untabify (arg &optional killp)
1962 "Delete characters backward, changing tabs into spaces.
1963 The exact behavior depends on `backward-delete-char-untabify-method'.
1964 Delete ARG chars, and kill (save in kill ring) if KILLP is non-nil.
1965 Interactively, ARG is the prefix arg (default 1)
1966 and KILLP is t if a prefix arg was specified."
1968 (when (eq backward-delete-char-untabify-method 'untabify)
1969 (let ((count arg))
1970 (save-excursion
1971 (while (and (> count 0) (not (bobp)))
1973 (let ((col (current-column)))
1974 (forward-char -1)
1975 (setq col (- col (current-column)))
1976 (insert-char ?\ col)
1977 (delete-char 1)))
1978 (forward-char -1)
1979 (setq count (1- count))))))
1980 (delete-backward-char
1982 ((eq backward-delete-char-untabify-method 'all)
1984 (if skip
1985 (let ((wh (- (point) (save-excursion (skip-chars-backward skip)
1986 (point)))))
1987 (+ arg (if (zerop wh) 0 (1- wh))))
1988 arg))
1989 killp))
1991 (defun zap-to-char (arg char)
1992 "Kill up to and including ARG'th occurrence of CHAR.
1993 Case is ignored if `case-fold-search' is non-nil in the current buffer.
1994 Goes backward if ARG is negative; error if CHAR not found."
1996 (kill-region (point) (progn
1997 (search-forward (char-to-string char) nil nil arg)
1998 ; (goto-char (if (> arg 0) (1- (point)) (1+ (point))))
1999 (point))))
2001 ;; kill-line and its subroutines.
2003 (defcustom kill-whole-line nil
2004 "*If non-nil, `kill-line' with no arg at beg of line kills the whole line."
2005 :type 'boolean
2006 :group 'killing)
2008 (defun kill-line (&optional arg)
2009 "Kill the rest of the current line; if no nonblanks there, kill thru newline.
2010 With prefix argument, kill that many lines from point.
2011 Negative arguments kill lines backward.
2012 With zero argument, kills the text before point on the current line.
2015 a number counts as a prefix arg.
2017 To kill a whole line, when point is not at the beginning, type \
2020 If `kill-whole-line' is non-nil, then this command kills the whole line
2021 including its terminating newline, when used at the beginning of a line
2022 with no argument. As a consequence, you can always kill a whole line
2025 If you want to append the killed line to the last killed text,
2028 If the buffer is read-only, Emacs will beep and refrain from deleting
2029 the line, but put the line in the kill ring anyway. This means that
2030 you can use this command to copy text from a read-only buffer."
2031 (interactive "P")
2032 (kill-region (point)
2033 ;; It is better to move point to the other end of the kill
2034 ;; before killing. That way, in a read-only buffer, point
2035 ;; moves across the text that is copied to the kill ring.
2036 ;; The choice has no effect on undo now that undo records
2037 ;; the value of point from before the command was run.
2038 (progn
2039 (if arg
2040 (forward-visible-line (prefix-numeric-value arg))
2041 (if (eobp)
2042 (signal 'end-of-buffer nil))
2044 (forward-visible-line 1)
2045 (end-of-visible-line)))
2046 (point))))
2048 (defun forward-visible-line (arg)
2049 "Move forward by ARG lines, ignoring currently invisible newlines only.
2050 If ARG is negative, move backward -ARG lines.
2051 If ARG is zero, move to the beginning of the current line."
2052 (condition-case nil
2053 (if (> arg 0)
2054 (while (> arg 0)
2055 (or (zerop (forward-line 1))
2056 (signal 'end-of-buffer nil))
2057 ;; If the following character is currently invisible,
2058 ;; skip all characters with that same `invisible' property value,
2059 ;; then find the next newline.
2060 (while (and (not (eobp))
2061 (let ((prop
2062 (get-char-property (point) 'invisible)))
2063 (if (eq buffer-invisibility-spec t)
2064 prop
2065 (or (memq prop buffer-invisibility-spec)
2066 (assq prop buffer-invisibility-spec)))))
2067 (goto-char
2068 (if (get-text-property (point) 'invisible)
2069 (or (next-single-property-change (point) 'invisible)
2070 (point-max))
2071 (next-overlay-change (point))))
2072 (or (zerop (forward-line 1))
2073 (signal 'end-of-buffer nil)))
2074 (setq arg (1- arg)))
2075 (let ((first t))
2076 (while (or first (< arg 0))
2077 (if (zerop arg)
2078 (beginning-of-line)
2079 (or (zerop (forward-line -1))
2080 (signal 'beginning-of-buffer nil)))
2081 (while (and (not (bobp))
2082 (let ((prop
2083 (get-char-property (1- (point)) 'invisible)))
2084 (if (eq buffer-invisibility-spec t)
2085 prop
2086 (or (memq prop buffer-invisibility-spec)
2087 (assq prop buffer-invisibility-spec)))))
2088 (goto-char
2089 (if (get-text-property (1- (point)) 'invisible)
2090 (or (previous-single-property-change (point) 'invisible)
2091 (point-min))
2092 (previous-overlay-change (point))))
2093 (or (zerop (forward-line -1))
2094 (signal 'beginning-of-buffer nil)))
2095 (setq first nil)
2096 (setq arg (1+ arg)))))
2097 ((beginning-of-buffer end-of-buffer)
2098 nil)))
2100 (defun end-of-visible-line ()
2101 "Move to end of current visible line."
2102 (end-of-line)
2103 ;; If the following character is currently invisible,
2104 ;; skip all characters with that same `invisible' property value,
2105 ;; then find the next newline.
2106 (while (and (not (eobp))
2107 (let ((prop
2108 (get-char-property (point) 'invisible)))
2109 (if (eq buffer-invisibility-spec t)
2110 prop
2111 (or (memq prop buffer-invisibility-spec)
2112 (assq prop buffer-invisibility-spec)))))
2113 (if (get-text-property (point) 'invisible)
2114 (goto-char (next-single-property-change (point) 'invisible))
2115 (goto-char (next-overlay-change (point))))
2116 (end-of-line)))
2118 (defun insert-buffer (buffer)
2119 "Insert after point the contents of BUFFER.
2120 Puts mark after the inserted text.
2121 BUFFER may be a buffer or a buffer name.
2123 This function is meant for the user to run interactively.
2124 Don't call it from programs!"
2125 (interactive
2126 (list
2127 (progn
2128 (barf-if-buffer-read-only)
2129 (read-buffer "Insert buffer: "
2130 (if (eq (selected-window) (next-window (selected-window)))
2131 (other-buffer (current-buffer))
2132 (window-buffer (next-window (selected-window))))
2133 t))))
2134 (or (bufferp buffer)
2135 (setq buffer (get-buffer buffer)))
2136 (let (start end newmark)
2137 (save-excursion
2138 (save-excursion
2139 (set-buffer buffer)
2140 (setq start (point-min) end (point-max)))
2141 (insert-buffer-substring buffer start end)
2142 (setq newmark (point)))
2143 (push-mark newmark))
2144 nil)
2146 (defun append-to-buffer (buffer start end)
2147 "Append to specified buffer the text of the region.
2148 It is inserted into that buffer before its point.
2150 When calling from a program, give three arguments:
2151 BUFFER (or buffer name), START and END.
2152 START and END specify the portion of the current buffer to be copied."
2153 (interactive
2154 (list (read-buffer "Append to buffer: " (other-buffer (current-buffer) t))
2155 (region-beginning) (region-end)))
2156 (let ((oldbuf (current-buffer)))
2157 (save-excursion
2158 (let* ((append-to (get-buffer-create buffer))
2159 (windows (get-buffer-window-list append-to t t))
2160 point)
2161 (set-buffer append-to)
2162 (setq point (point))
2163 (barf-if-buffer-read-only)
2164 (insert-buffer-substring oldbuf start end)
2165 (dolist (window windows)
2166 (when (= (window-point window) point)
2167 (set-window-point window (point))))))))
2169 (defun prepend-to-buffer (buffer start end)
2170 "Prepend to specified buffer the text of the region.
2171 It is inserted into that buffer after its point.
2173 When calling from a program, give three arguments:
2174 BUFFER (or buffer name), START and END.
2175 START and END specify the portion of the current buffer to be copied."
2177 (let ((oldbuf (current-buffer)))
2178 (save-excursion
2179 (set-buffer (get-buffer-create buffer))
2180 (barf-if-buffer-read-only)
2181 (save-excursion
2182 (insert-buffer-substring oldbuf start end)))))
2184 (defun copy-to-buffer (buffer start end)
2185 "Copy to specified buffer the text of the region.
2186 It is inserted into that buffer, replacing existing text there.
2188 When calling from a program, give three arguments:
2189 BUFFER (or buffer name), START and END.
2190 START and END specify the portion of the current buffer to be copied."
2192 (let ((oldbuf (current-buffer)))
2193 (save-excursion
2194 (set-buffer (get-buffer-create buffer))
2195 (barf-if-buffer-read-only)
2196 (erase-buffer)
2197 (save-excursion
2198 (insert-buffer-substring oldbuf start end)))))
2200 (put 'mark-inactive 'error-conditions '(mark-inactive error))
2201 (put 'mark-inactive 'error-message "The mark is not active now")
2203 (defun mark (&optional force)
2204 "Return this buffer's mark value as integer; error if mark inactive.
2205 If optional argument FORCE is non-nil, access the mark value
2206 even if the mark is not currently active, and return nil
2207 if there is no mark at all.
2209 If you are using this in an editing command, you are most likely making
2210 a mistake; see the documentation of `set-mark'."
2211 (if (or force (not transient-mark-mode) mark-active mark-even-if-inactive)
2212 (marker-position (mark-marker))
2213 (signal 'mark-inactive nil)))
2215 ;; Many places set mark-active directly, and several of them failed to also
2216 ;; run deactivate-mark-hook. This shorthand should simplify.
2217 (defsubst deactivate-mark ()
2218 "Deactivate the mark by setting `mark-active' to nil.
2219 \(That makes a difference only in Transient Mark mode.)
2220 Also runs the hook `deactivate-mark-hook'."
2221 (if transient-mark-mode
2222 (progn
2223 (setq mark-active nil)
2224 (run-hooks 'deactivate-mark-hook))))
2226 (defun set-mark (pos)
2227 "Set this buffer's mark to POS. Don't use this function!
2228 That is to say, don't use this function unless you want
2229 the user to see that the mark has moved, and you want the previous
2230 mark position to be lost.
2232 Normally, when a new mark is set, the old one should go on the stack.
2233 This is why most applications should use push-mark, not set-mark.
2235 Novice Emacs Lisp programmers often try to use the mark for the wrong
2236 purposes. The mark saves a location for the user's convenience.
2237 Most editing commands should not alter the mark.
2238 To remember a location for internal use in the Lisp program,
2239 store it in a Lisp variable. Example:
2241 (let ((beg (point))) (forward-line 1) (delete-region beg (point)))."
2243 (if pos
2244 (progn
2245 (setq mark-active t)
2246 (run-hooks 'activate-mark-hook)
2247 (set-marker (mark-marker) pos (current-buffer)))
2248 ;; Normally we never clear mark-active except in Transient Mark mode.
2249 ;; But when we actually clear out the mark value too,
2250 ;; we must clear mark-active in any mode.
2251 (setq mark-active nil)
2252 (run-hooks 'deactivate-mark-hook)
2253 (set-marker (mark-marker) nil)))
2255 (defvar mark-ring nil
2256 "The list of former marks of the current buffer, most recent first.")
2257 (make-variable-buffer-local 'mark-ring)
2258 (put 'mark-ring 'permanent-local t)
2260 (defcustom mark-ring-max 16
2261 "*Maximum size of mark ring. Start discarding off end if gets this big."
2262 :type 'integer
2263 :group 'editing-basics)
2265 (defvar global-mark-ring nil
2266 "The list of saved global marks, most recent first.")
2268 (defcustom global-mark-ring-max 16
2269 "*Maximum size of global mark ring. \
2270 Start discarding off end if gets this big."
2271 :type 'integer
2272 :group 'editing-basics)
2274 (defun set-mark-command (arg)
2275 "Set mark at where point is, or jump to mark.
2276 With no prefix argument, set mark, push old mark position on local mark
2277 ring, and push mark on global mark ring.
2278 With argument, jump to mark, and pop a new position for mark off the ring
2279 \(does not affect global mark ring\).
2281 Novice Emacs Lisp programmers often try to use the mark for the wrong
2282 purposes. See the documentation of `set-mark' for more information."
2283 (interactive "P")
2284 (if (null arg)
2285 (progn
2286 (push-mark nil nil t))
2287 (if (null (mark t))
2288 (error "No mark set in this buffer")
2289 (goto-char (mark t))
2290 (pop-mark))))
2292 (defun push-mark (&optional location nomsg activate)
2293 "Set mark at LOCATION (point, by default) and push old mark on mark ring.
2294 If the last global mark pushed was not in the current buffer,
2295 also push LOCATION on the global mark ring.
2296 Display `Mark set' unless the optional second arg NOMSG is non-nil.
2297 In Transient Mark mode, activate mark if optional third arg ACTIVATE non-nil.
2299 Novice Emacs Lisp programmers often try to use the mark for the wrong
2300 purposes. See the documentation of `set-mark' for more information.
2302 In Transient Mark mode, this does not activate the mark."
2303 (if (null (mark t))
2304 nil
2305 (setq mark-ring (cons (copy-marker (mark-marker)) mark-ring))
2306 (if (> (length mark-ring) mark-ring-max)
2307 (progn
2308 (move-marker (car (nthcdr mark-ring-max mark-ring)) nil)
2309 (setcdr (nthcdr (1- mark-ring-max) mark-ring) nil))))
2310 (set-marker (mark-marker) (or location (point)) (current-buffer))
2311 ;; Now push the mark on the global mark ring.
2312 (if (and global-mark-ring
2313 (eq (marker-buffer (car global-mark-ring)) (current-buffer)))
2314 ;; The last global mark pushed was in this same buffer.
2315 ;; Don't push another one.
2316 nil
2317 (setq global-mark-ring (cons (copy-marker (mark-marker)) global-mark-ring))
2318 (if (> (length global-mark-ring) global-mark-ring-max)
2319 (progn
2320 (move-marker (car (nthcdr global-mark-ring-max global-mark-ring))
2321 nil)
2322 (setcdr (nthcdr (1- global-mark-ring-max) global-mark-ring) nil))))
2323 (or nomsg executing-kbd-macro (> (minibuffer-depth) 0)
2324 (message "Mark set"))
2325 (if (or activate (not transient-mark-mode))
2326 (set-mark (mark t)))
2327 nil)
2329 (defun pop-mark ()
2330 "Pop off mark ring into the buffer's actual mark.
2331 Does not set point. Does nothing if mark ring is empty."
2332 (if mark-ring
2333 (progn
2334 (setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker)))))
2335 (set-marker (mark-marker) (+ 0 (car mark-ring)) (current-buffer))
2336 (deactivate-mark)
2337 (move-marker (car mark-ring) nil)
2338 (if (null (mark t)) (ding))
2339 (setq mark-ring (cdr mark-ring)))))
2341 (defalias 'exchange-dot-and-mark 'exchange-point-and-mark)
2342 (defun exchange-point-and-mark ()
2343 "Put the mark where point is now, and point where the mark is now.
2344 This command works even when the mark is not active,
2345 and it reactivates the mark."
2346 (interactive nil)
2347 (let ((omark (mark t)))
2348 (if (null omark)
2349 (error "No mark set in this buffer"))
2350 (set-mark (point))
2351 (goto-char omark)
2352 nil))
2354 (defun transient-mark-mode (arg)
2355 "Toggle Transient Mark mode.
2356 With arg, turn Transient Mark mode on if arg is positive, off otherwise.
2358 In Transient Mark mode, when the mark is active, the region is highlighted.
2360 So do certain other operations that set the mark
2361 but whose main purpose is something else--for example,
2367 Many commands change their behavior when Transient Mark mode is in effect
2368 and the mark is active, by acting on the region instead of their usual
2369 default part of the buffer's text. Examples of such commands include
2373 the prompt, to see the documentation of commands which are sensitive to
2374 the Transient Mark mode."
2375 (interactive "P")
2376 (setq transient-mark-mode
2377 (if (null arg)
2378 (not transient-mark-mode)
2379 (> (prefix-numeric-value arg) 0)))
2380 (if (interactive-p)
2381 (if transient-mark-mode
2382 (message "Transient Mark mode enabled")
2383 (message "Transient Mark mode disabled"))))
2385 (defun pop-global-mark ()
2386 "Pop off global mark ring and jump to the top location."
2387 (interactive)
2388 ;; Pop entries which refer to non-existent buffers.
2389 (while (and global-mark-ring (not (marker-buffer (car global-mark-ring))))
2390 (setq global-mark-ring (cdr global-mark-ring)))
2391 (or global-mark-ring
2392 (error "No global mark set"))
2393 (let* ((marker (car global-mark-ring))
2394 (buffer (marker-buffer marker))
2395 (position (marker-position marker)))
2396 (setq global-mark-ring (nconc (cdr global-mark-ring)
2397 (list (car global-mark-ring))))
2398 (set-buffer buffer)
2399 (or (and (>= position (point-min))
2400 (<= position (point-max)))
2401 (widen))
2402 (goto-char position)
2403 (switch-to-buffer buffer)))
2405 (defcustom next-line-add-newlines nil
2406 "*If non-nil, `next-line' inserts newline to avoid `end of buffer' error."
2407 :type 'boolean
2408 :version "21.1"
2409 :group 'editing-basics)
2411 (defun next-line (arg)
2412 "Move cursor vertically down ARG lines.
2413 If there is no character in the target line exactly under the current column,
2414 the cursor is positioned after the character in that line which spans this
2415 column, or at the end of the line if it is not long enough.
2416 If there is no line in the buffer after this one, behavior depends on the
2417 value of `next-line-add-newlines'. If non-nil, it inserts a newline character
2418 to create a line, and moves the cursor to that line. Otherwise it moves the
2419 cursor to the end of the buffer.
2422 a semipermanent goal column for this command.
2423 Then instead of trying to move exactly vertically (or as close as possible),
2424 this command moves to the specified goal column (or as close as possible).
2425 The goal column is stored in the variable `goal-column', which is nil
2426 when there is no goal column.
2428 If you are thinking of using this in a Lisp program, consider
2429 using `forward-line' instead. It is usually easier to use
2430 and more reliable (no dependence on goal column, etc.)."
2431 (interactive "p")
2432 (if (and next-line-add-newlines (= arg 1))
2433 (if (save-excursion (end-of-line) (eobp))
2434 ;; When adding a newline, don't expand an abbrev.
2435 (let ((abbrev-mode nil))
2436 (end-of-line)
2438 (line-move arg))
2439 (if (interactive-p)
2440 (condition-case nil
2441 (line-move arg)
2442 ((beginning-of-buffer end-of-buffer) (ding)))
2443 (line-move arg)))
2444 nil)
2446 (defun previous-line (arg)
2447 "Move cursor vertically up ARG lines.
2448 If there is no character in the target line exactly over the current column,
2449 the cursor is positioned after the character in that line which spans this
2450 column, or at the end of the line if it is not long enough.
2453 a semipermanent goal column for this command.
2454 Then instead of trying to move exactly vertically (or as close as possible),
2455 this command moves to the specified goal column (or as close as possible).
2456 The goal column is stored in the variable `goal-column', which is nil
2457 when there is no goal column.
2459 If you are thinking of using this in a Lisp program, consider using
2460 `forward-line' with a negative argument instead. It is usually easier
2461 to use and more reliable (no dependence on goal column, etc.)."
2462 (interactive "p")
2463 (if (interactive-p)
2464 (condition-case nil
2465 (line-move (- arg))
2466 ((beginning-of-buffer end-of-buffer) (ding)))
2467 (line-move (- arg)))
2468 nil)
2470 (defcustom track-eol nil
2471 "*Non-nil means vertical motion starting at end of line keeps to ends of lines.
2472 This means moving to the end of each line moved onto.
2473 The beginning of a blank line does not count as the end of a line."
2474 :type 'boolean
2475 :group 'editing-basics)
2477 (defcustom goal-column nil
2479 :type '(choice integer
2480 (const :tag "None" nil))
2481 :group 'editing-basics)
2482 (make-variable-buffer-local 'goal-column)
2484 (defvar temporary-goal-column 0
2485 "Current goal column for vertical motion.
2486 It is the column where point was
2487 at the start of current run of vertical motion commands.
2488 When the `track-eol' feature is doing its job, the value is 9999.")
2490 (defcustom line-move-ignore-invisible nil
2492 Outline mode sets this."
2493 :type 'boolean
2494 :group 'editing-basics)
2496 ;; This is the guts of next-line and previous-line.
2497 ;; Arg says how many lines to move.
2498 (defun line-move (arg)
2499 ;; Don't run any point-motion hooks, and disregard intangibility,
2500 ;; for intermediate positions.
2501 (let ((inhibit-point-motion-hooks t)
2502 (opoint (point))
2503 new line-end line-beg)
2504 (unwind-protect
2505 (progn
2506 (if (not (or (eq last-command 'next-line)
2507 (eq last-command 'previous-line)))
2508 (setq temporary-goal-column
2509 (if (and track-eol (eolp)
2510 ;; Don't count beg of empty line as end of line
2511 ;; unless we just did explicit end-of-line.
2512 (or (not (bolp)) (eq last-command 'end-of-line)))
2513 9999
2514 (current-column))))
2515 (if (and (not (integerp selective-display))
2516 (not line-move-ignore-invisible))
2517 ;; Use just newline characters.
2518 (or (if (> arg 0)
2519 (progn (if (> arg 1) (forward-line (1- arg)))
2520 ;; This way of moving forward ARG lines
2521 ;; verifies that we have a newline after the last one.
2522 ;; It doesn't get confused by intangible text.
2523 (end-of-line)
2524 (zerop (forward-line 1)))
2525 (and (zerop (forward-line arg))
2526 (bolp)))
2527 (signal (if (< arg 0)
2528 'beginning-of-buffer
2529 'end-of-buffer)
2530 nil))
2531 ;; Move by arg lines, but ignore invisible ones.
2532 (while (> arg 0)
2533 (end-of-line)
2534 (and (zerop (vertical-motion 1))
2535 (signal 'end-of-buffer nil))
2536 ;; If the following character is currently invisible,
2537 ;; skip all characters with that same `invisible' property value.
2538 (while (and (not (eobp))
2539 (let ((prop
2540 (get-char-property (point) 'invisible)))
2541 (if (eq buffer-invisibility-spec t)
2542 prop
2543 (or (memq prop buffer-invisibility-spec)
2544 (assq prop buffer-invisibility-spec)))))
2545 (if (get-text-property (point) 'invisible)
2546 (goto-char (next-single-property-change (point) 'invisible))
2547 (goto-char (next-overlay-change (point)))))
2548 (setq arg (1- arg)))
2549 (while (< arg 0)
2550 (beginning-of-line)
2551 (and (zerop (vertical-motion -1))
2552 (signal 'beginning-of-buffer nil))
2553 (while (and (not (bobp))
2554 (let ((prop
2555 (get-char-property (1- (point)) 'invisible)))
2556 (if (eq buffer-invisibility-spec t)
2557 prop
2558 (or (memq prop buffer-invisibility-spec)
2559 (assq prop buffer-invisibility-spec)))))
2560 (if (get-text-property (1- (point)) 'invisible)
2561 (goto-char (previous-single-property-change (point) 'invisible))
2562 (goto-char (previous-overlay-change (point)))))
2563 (setq arg (1+ arg))))
2564 (let ((buffer-invisibility-spec nil))
2565 (move-to-column (or goal-column temporary-goal-column))))
2566 (setq new (point))
2567 ;; If we are moving into some intangible text,
2568 ;; look for following text on the same line which isn't intangible
2569 ;; and move there.
2570 (setq line-end (save-excursion (end-of-line) (point)))
2571 (setq line-beg (save-excursion (beginning-of-line) (point)))
2572 (let ((after (and (< new (point-max))
2573 (get-char-property new 'intangible)))
2574 (before (and (> new (point-min))
2575 (get-char-property (1- new) 'intangible))))
2576 (when (and before (eq before after)
2577 (not (bolp)))
2578 (goto-char (point-min))
2579 (let ((inhibit-point-motion-hooks nil))
2580 (goto-char new))
2581 (if (<= new line-end)
2582 (setq new (point)))))
2583 ;; NEW is where we want to move to.
2584 ;; LINE-BEG and LINE-END are the beginning and end of the line.
2585 ;; Move there in just one step, from our starting position,
2586 ;; with intangibility and point-motion hooks enabled this time.
2587 (goto-char opoint)
2588 (setq inhibit-point-motion-hooks nil)
2589 (goto-char
2590 (constrain-to-field new opoint nil t 'inhibit-line-move-field-capture))
2591 ;; If intangibility processing moved us to a different line,
2592 ;; readjust the horizontal position within the line we ended up at.
2593 (when (or (< (point) line-beg) (> (point) line-end))
2594 (setq new (point))
2595 (setq inhibit-point-motion-hooks t)
2596 (setq line-end (save-excursion (end-of-line) (point)))
2597 (beginning-of-line)
2598 (setq line-beg (point))
2599 (let ((buffer-invisibility-spec nil))
2600 (move-to-column (or goal-column temporary-goal-column)))
2601 (if (<= (point) line-end)
2602 (setq new (point)))
2603 (goto-char (point-min))
2604 (setq inhibit-point-motion-hooks nil)
2605 (goto-char
2606 (constrain-to-field new opoint nil t
2607 'inhibit-line-move-field-capture)))))
2608 nil)
2610 ;;; Many people have said they rarely use this feature, and often type
2611 ;;; it by accident. Maybe it shouldn't even be on a key.
2612 (put 'set-goal-column 'disabled t)
2614 (defun set-goal-column (arg)
2616 Those commands will move to this position in the line moved to
2617 rather than trying to keep the same horizontal position.
2618 With a non-nil argument, clears out the goal column
2620 The goal column is stored in the variable `goal-column'."
2621 (interactive "P")
2622 (if arg
2623 (progn
2624 (setq goal-column nil)
2625 (message "No goal column"))
2626 (setq goal-column (current-column))
2627 (message (substitute-command-keys
2629 goal-column))
2630 nil)
2633 (defun scroll-other-window-down (lines)
2635 For more details, see the documentation for `scroll-other-window'."
2636 (interactive "P")
2637 (scroll-other-window
2638 ;; Just invert the argument's meaning.
2639 ;; We can do that without knowing which window it will be.
2640 (if (eq lines '-) nil
2641 (if (null lines) '-
2642 (- (prefix-numeric-value lines))))))
2643 (define-key esc-map [?\C-\S-v] 'scroll-other-window-down)
2645 (defun beginning-of-buffer-other-window (arg)
2646 "Move point to the beginning of the buffer in the other window.
2647 Leave mark at previous position.
2648 With arg N, put point N/10 of the way from the true beginning."
2649 (interactive "P")
2650 (let ((orig-window (selected-window))
2651 (window (other-window-for-scrolling)))
2652 ;; We use unwind-protect rather than save-window-excursion
2653 ;; because the latter would preserve the things we want to change.
2654 (unwind-protect
2655 (progn
2656 (select-window window)
2657 ;; Set point and mark in that window's buffer.
2658 (beginning-of-buffer arg)
2659 ;; Set point accordingly.
2660 (recenter '(t)))
2661 (select-window orig-window))))
2663 (defun end-of-buffer-other-window (arg)
2664 "Move point to the end of the buffer in the other window.
2665 Leave mark at previous position.
2666 With arg N, put point N/10 of the way from the true end."
2667 (interactive "P")
2668 ;; See beginning-of-buffer-other-window for comments.
2669 (let ((orig-window (selected-window))
2670 (window (other-window-for-scrolling)))
2671 (unwind-protect
2672 (progn
2673 (select-window window)
2674 (end-of-buffer arg)
2675 (recenter '(t)))
2676 (select-window orig-window))))
2678 (defun transpose-chars (arg)
2679 "Interchange characters around point, moving forward one character.
2680 With prefix arg ARG, effect is to take character before point
2681 and drag it forward past ARG other characters (backward if ARG negative).
2682 If no argument and at end of line, the previous two chars are exchanged."
2683 (interactive "*P")
2684 (and (null arg) (eolp) (forward-char -1))
2685 (transpose-subr 'forward-char (prefix-numeric-value arg)))
2687 (defun transpose-words (arg)
2688 "Interchange words around point, leaving point at end of them.
2689 With prefix arg ARG, effect is to take word before or around point
2690 and drag it forward past ARG other words (backward if ARG negative).
2691 If ARG is zero, the words around or after point and around or after mark
2692 are interchanged."
2693 (interactive "*p")
2694 (transpose-subr 'forward-word arg))
2696 (defun transpose-sexps (arg)
2698 Does not work on a sexp that point is in the middle of
2699 if it is a list or string."
2700 (interactive "*p")
2701 (transpose-subr 'forward-sexp arg))
2703 (defun transpose-lines (arg)
2704 "Exchange current line and previous line, leaving point after both.
2705 With argument ARG, takes previous line and moves it past ARG lines.
2706 With argument 0, interchanges line point is in with line mark is in."
2707 (interactive "*p")
2708 (transpose-subr (function
2709 (lambda (arg)
2710 (if (> arg 0)
2711 (progn
2712 ;; Move forward over ARG lines,
2713 ;; but create newlines if necessary.
2714 (setq arg (forward-line arg))
2716 (setq arg (1+ arg)))
2717 (if (> arg 0)
2718 (newline arg)))
2719 (forward-line arg))))
2720 arg))
2722 (defun transpose-subr (mover arg &optional special)
2723 (let ((aux (if special mover
2724 (lambda (x)
2725 (cons (progn (funcall mover x) (point))
2726 (progn (funcall mover (- x)) (point))))))
2727 pos1 pos2)
2728 (cond
2729 ((= arg 0)
2730 (save-excursion
2731 (setq pos1 (funcall aux 1))
2732 (goto-char (mark))
2733 (setq pos2 (funcall aux 1))
2734 (transpose-subr-1 pos1 pos2))
2735 (exchange-point-and-mark))
2736 ((> arg 0)
2737 (setq pos1 (funcall aux -1))
2738 (setq pos2 (funcall aux arg))
2739 (transpose-subr-1 pos1 pos2)
2740 (goto-char (car pos2)))
2741 (t
2742 (setq pos1 (funcall aux -1))
2743 (goto-char (car pos1))
2744 (setq pos2 (funcall aux arg))
2745 (transpose-subr-1 pos1 pos2)))))
2747 (defun transpose-subr-1 (pos1 pos2)
2748 (when (> (car pos1) (cdr pos1)) (setq pos1 (cons (cdr pos1) (car pos1))))
2749 (when (> (car pos2) (cdr pos2)) (setq pos2 (cons (cdr pos2) (car pos2))))
2750 (when (> (car pos1) (car pos2))
2751 (let ((swap pos1))
2752 (setq pos1 pos2 pos2 swap)))
2753 (if (> (cdr pos1) (car pos2)) (error "Don't have two things to transpose"))
2754 (let ((word2 (delete-and-extract-region (car pos2) (cdr pos2))))
2755 (goto-char (car pos2))
2756 (insert (delete-and-extract-region (car pos1) (cdr pos1)))
2757 (goto-char (car pos1))
2758 (insert word2)))
2760 (defun backward-word (arg)
2761 "Move backward until encountering the beginning of a word.
2762 With argument, do this that many times."
2763 (interactive "p")
2764 (forward-word (- arg)))
2766 (defun mark-word (arg)
2767 "Set mark arg words away from point."
2768 (interactive "p")
2769 (push-mark
2770 (save-excursion
2771 (forward-word arg)
2772 (point))
2773 nil t))
2775 (defun kill-word (arg)
2776 "Kill characters forward until encountering the end of a word.
2777 With argument, do this that many times."
2778 (interactive "p")
2779 (kill-region (point) (progn (forward-word arg) (point))))
2781 (defun backward-kill-word (arg)
2782 "Kill characters backward until encountering the end of a word.
2783 With argument, do this that many times."
2784 (interactive "p")
2785 (kill-word (- arg)))
2787 (defun current-word (&optional strict)
2788 "Return the word point is on (or a nearby word) as a string.
2789 If optional arg STRICT is non-nil, return nil unless point is within
2790 or adjacent to a word."
2791 (save-excursion
2792 (let ((oldpoint (point)) (start (point)) (end (point)))
2793 (skip-syntax-backward "w_") (setq start (point))
2794 (goto-char oldpoint)
2795 (skip-syntax-forward "w_") (setq end (point))
2796 (if (and (eq start oldpoint) (eq end oldpoint))
2797 ;; Point is neither within nor adjacent to a word.
2798 (and (not strict)
2799 (progn
2800 ;; Look for preceding word in same line.
2801 (skip-syntax-backward "^w_"
2802 (save-excursion (beginning-of-line)
2803 (point)))
2804 (if (bolp)
2805 ;; No preceding word in same line.
2806 ;; Look for following word in same line.
2807 (progn
2808 (skip-syntax-forward "^w_"
2809 (save-excursion (end-of-line)
2810 (point)))
2811 (setq start (point))
2812 (skip-syntax-forward "w_")
2813 (setq end (point)))
2814 (setq end (point))
2815 (skip-syntax-backward "w_")
2816 (setq start (point)))
2817 (buffer-substring-no-properties start end)))
2818 (buffer-substring-no-properties start end)))))
2820 (defcustom fill-prefix nil
2821 "*String for filling to insert at front of new line, or nil for none."
2822 :type '(choice (const :tag "None" nil)
2823 string)
2824 :group 'fill)
2825 (make-variable-buffer-local 'fill-prefix)
2827 (defcustom auto-fill-inhibit-regexp nil
2828 "*Regexp to match lines which should not be auto-filled."
2829 :type '(choice (const :tag "None" nil)
2830 regexp)
2831 :group 'fill)
2833 (defvar comment-line-break-function 'comment-indent-new-line
2834 "*Mode-specific function which line breaks and continues a comment.
2836 This function is only called during auto-filling of a comment section.
2837 The function should take a single optional argument, which is a flag
2838 indicating whether it should use soft newlines.
2840 Setting this variable automatically makes it local to the current buffer.")
2842 ;; This function is used as the auto-fill-function of a buffer
2843 ;; when Auto-Fill mode is enabled.
2844 ;; It returns t if it really did any work.
2845 ;; (Actually some major modes use a different auto-fill function,
2846 ;; but this one is the default one.)
2847 (defun do-auto-fill ()
2848 (let (fc justify bol give-up
2849 (fill-prefix fill-prefix))
2850 (if (or (not (setq justify (current-justification)))
2851 (null (setq fc (current-fill-column)))
2852 (and (eq justify 'left)
2853 (<= (current-column) fc))
2854 (save-excursion (beginning-of-line)
2855 (setq bol (point))
2856 (and auto-fill-inhibit-regexp
2857 (looking-at auto-fill-inhibit-regexp))))
2858 nil ;; Auto-filling not required
2859 (if (memq justify '(full center right))
2860 (save-excursion (unjustify-current-line)))
2862 ;; Choose a fill-prefix automatically.
2863 (when (and adaptive-fill-mode
2864 (or (null fill-prefix) (string= fill-prefix "")))
2865 (let ((prefix
2866 (fill-context-prefix
2867 (save-excursion (backward-paragraph 1) (point))
2868 (save-excursion (forward-paragraph 1) (point)))))
2869 (and prefix (not (equal prefix ""))
2870 ;; Use auto-indentation rather than a guessed empty prefix.
2871 (not (and fill-indent-according-to-mode
2873 (setq fill-prefix prefix))))
2875 (while (and (not give-up) (> (current-column) fc))
2876 ;; Determine where to split the line.
2877 (let* (after-prefix
2878 (fill-point
2879 (let ((opoint (point))
2880 bounce
2881 (first t))
2882 (save-excursion
2883 (beginning-of-line)
2884 (setq after-prefix (point))
2885 (and fill-prefix
2886 (looking-at (regexp-quote fill-prefix))
2887 (setq after-prefix (match-end 0)))
2888 (move-to-column (1+ fc))
2889 ;; Move back to the point where we can break the line.
2890 ;; We break the line between word or
2891 ;; after/before the character which has character
2892 ;; category `|'. We search space, \c| followed by
2893 ;; a character, or \c| following a character. If
2894 ;; not found, place the point at beginning of line.
2895 (while (or first
2896 (and (not (bobp))
2897 (not bounce)
2898 (fill-nobreak-p)))
2899 (setq first nil)
2901 ;; If we find nowhere on the line to break it,
2902 ;; break after one word. Set bounce to t
2903 ;; so we will not keep going in this while loop.
2904 (if (<= (point) after-prefix)
2905 (progn
2906 (goto-char after-prefix)
2908 (setq bounce t))
2910 ;; Break the line at word boundary.
2912 ;; Break the line after/before \c|.
2913 (forward-char 1))))
2914 (if enable-multibyte-characters
2915 ;; If we are going to break the line after or
2916 ;; before a non-ascii character, we may have
2917 ;; to run a special function for the charset
2918 ;; of the character to find the correct break
2919 ;; point.
2920 (if (not (and (eq (charset-after (1- (point))) 'ascii)
2921 (eq (charset-after (point)) 'ascii)))
2922 (fill-find-break-point after-prefix)))
2924 ;; Let fill-point be set to the place where we end up.
2925 ;; But move back before any whitespace here.
2927 (point)))))
2929 ;; See whether the place we found is any good.
2930 (if (save-excursion
2931 (goto-char fill-point)
2932 (and (not (bolp))
2933 ;; There is no use breaking at end of line.
2934 (not (save-excursion (skip-chars-forward " ") (eolp)))
2935 ;; It is futile to split at the end of the prefix
2936 ;; since we would just insert the prefix again.
2937 (not (and after-prefix (<= (point) after-prefix)))
2938 ;; Don't split right after a comment starter
2939 ;; since we would just make another comment starter.
2940 (not (and comment-start-skip
2941 (let ((limit (point)))
2942 (beginning-of-line)
2943 (and (re-search-forward comment-start-skip
2944 limit t)
2945 (eq (point) limit)))))))
2946 ;; Ok, we have a useful place to break the line. Do it.
2947 (let ((prev-column (current-column)))
2948 ;; If point is at the fill-point, do not `save-excursion'.
2949 ;; Otherwise, if a comment prefix or fill-prefix is inserted,
2950 ;; point will end up before it rather than after it.
2951 (if (save-excursion
2953 (= (point) fill-point))
2954 (funcall comment-line-break-function t)
2955 (save-excursion
2956 (goto-char fill-point)
2957 (funcall comment-line-break-function t)))
2958 ;; Now do justification, if required
2959 (if (not (eq justify 'left))
2960 (save-excursion
2961 (end-of-line 0)
2962 (justify-current-line justify nil t)))
2963 ;; If making the new line didn't reduce the hpos of
2964 ;; the end of the line, then give up now;
2965 ;; trying again will not help.
2966 (if (>= (current-column) prev-column)
2967 (setq give-up t)))
2968 ;; No good place to break => stop trying.
2969 (setq give-up t))))
2970 ;; Justify last line.
2971 (justify-current-line justify t t)
2972 t)))
2974 (defvar normal-auto-fill-function 'do-auto-fill
2975 "The function to use for `auto-fill-function' if Auto Fill mode is turned on.
2976 Some major modes set this.")
2978 (defun auto-fill-mode (&optional arg)
2979 "Toggle Auto Fill mode.
2980 With arg, turn Auto Fill mode on if and only if arg is positive.
2981 In Auto Fill mode, inserting a space at a column beyond `current-fill-column'
2982 automatically breaks the line at a previous space.
2984 The value of `normal-auto-fill-function' specifies the function to use
2985 for `auto-fill-function' when turning Auto Fill mode on."
2986 (interactive "P")
2987 (prog1 (setq auto-fill-function
2988 (if (if (null arg)
2989 (not auto-fill-function)
2990 (> (prefix-numeric-value arg) 0))
2991 normal-auto-fill-function
2992 nil))
2993 (force-mode-line-update)))
2995 ;; This holds a document string used to document auto-fill-mode.
2996 (defun auto-fill-function ()
2997 "Automatically break line at a previous space, in insertion of text."
2998 nil)
3000 (defun turn-on-auto-fill ()
3001 "Unconditionally turn on Auto Fill mode."
3002 (auto-fill-mode 1))
3004 (defun turn-off-auto-fill ()
3005 "Unconditionally turn off Auto Fill mode."
3006 (auto-fill-mode -1))
3008 (custom-add-option 'text-mode-hook 'turn-on-auto-fill)
3010 (defun set-fill-column (arg)
3011 "Set `fill-column' to specified argument.
3014 (interactive "P")
3015 (if (consp arg)
3016 (setq arg (current-column)))
3017 (if (not (integerp arg))
3018 ;; Disallow missing argument; it's probably a typo for C-x C-f.
3019 (error "set-fill-column requires an explicit argument")
3020 (message "Fill column set to %d (was %d)" arg fill-column)
3021 (setq fill-column arg)))
3023 (defun set-selective-display (arg)
3024 "Set `selective-display' to ARG; clear it if no arg.
3025 When the value of `selective-display' is a number > 0,
3026 lines whose indentation is >= that value are not displayed.
3027 The variable `selective-display' has a separate value for each buffer."
3028 (interactive "P")
3029 (if (eq selective-display t)
3030 (error "selective-display already in use for marked lines"))
3031 (let ((current-vpos
3032 (save-restriction
3033 (narrow-to-region (point-min) (point))
3034 (goto-char (window-start))
3035 (vertical-motion (window-height)))))
3036 (setq selective-display
3037 (and arg (prefix-numeric-value arg)))
3038 (recenter current-vpos))
3039 (set-window-start (selected-window) (window-start (selected-window)))
3040 (princ "selective-display set to " t)
3041 (prin1 selective-display t)
3042 (princ "." t))
3044 (defvar overwrite-mode-textual " Ovwrt"
3045 "The string displayed in the mode line when in overwrite mode.")
3046 (defvar overwrite-mode-binary " Bin Ovwrt"
3047 "The string displayed in the mode line when in binary overwrite mode.")
3049 (defun overwrite-mode (arg)
3050 "Toggle overwrite mode.
3051 With arg, turn overwrite mode on iff arg is positive.
3052 In overwrite mode, printing characters typed in replace existing text
3053 on a one-for-one basis, rather than pushing it to the right. At the
3054 end of a line, such characters extend the line. Before a tab,
3055 such characters insert until the tab is filled in.
3057 is supposed to make it easier to insert characters when necessary."
3058 (interactive "P")
3059 (setq overwrite-mode
3060 (if (if (null arg) (not overwrite-mode)
3061 (> (prefix-numeric-value arg) 0))
3062 'overwrite-mode-textual))
3063 (force-mode-line-update))
3065 (defun binary-overwrite-mode (arg)
3066 "Toggle binary overwrite mode.
3067 With arg, turn binary overwrite mode on iff arg is positive.
3068 In binary overwrite mode, printing characters typed in replace
3069 existing text. Newlines are not treated specially, so typing at the
3070 end of a line joins the line to the next, with the typed character
3071 between them. Typing before a tab character simply replaces the tab
3072 with the character typed.
3074 typing characters do.
3076 Note that binary overwrite mode is not its own minor mode; it is a
3077 specialization of overwrite-mode, entered by setting the
3078 `overwrite-mode' variable to `overwrite-mode-binary'."
3079 (interactive "P")
3080 (setq overwrite-mode
3081 (if (if (null arg)
3082 (not (eq overwrite-mode 'overwrite-mode-binary))
3083 (> (prefix-numeric-value arg) 0))
3084 'overwrite-mode-binary))
3085 (force-mode-line-update))
3087 (defcustom line-number-mode t
3088 "*Non-nil means display line number in mode line."
3089 :type 'boolean
3090 :group 'editing-basics)
3092 (defun line-number-mode (arg)
3093 "Toggle Line Number mode.
3094 With arg, turn Line Number mode on iff arg is positive.
3095 When Line Number mode is enabled, the line number appears
3096 in the mode line.
3098 Line numbers do not appear for very large buffers and buffers
3099 with very long lines; see variables `line-number-display-limit'
3100 and `line-number-display-limit-width'."
3101 (interactive "P")
3102 (setq line-number-mode
3103 (if (null arg) (not line-number-mode)
3104 (> (prefix-numeric-value arg) 0)))
3105 (force-mode-line-update))
3107 (defcustom column-number-mode nil
3108 "*Non-nil means display column number in mode line."
3109 :type 'boolean
3110 :group 'editing-basics)
3112 (defun column-number-mode (arg)
3113 "Toggle Column Number mode.
3114 With arg, turn Column Number mode on iff arg is positive.
3115 When Column Number mode is enabled, the column number appears
3116 in the mode line."
3117 (interactive "P")
3118 (setq column-number-mode
3119 (if (null arg) (not column-number-mode)
3120 (> (prefix-numeric-value arg) 0)))
3121 (force-mode-line-update))
3123 (defgroup paren-blinking nil
3124 "Blinking matching of parens and expressions."
3125 :prefix "blink-matching-"
3126 :group 'paren-matching)
3128 (defcustom blink-matching-paren t
3129 "*Non-nil means show matching open-paren when close-paren is inserted."
3130 :type 'boolean
3131 :group 'paren-blinking)
3133 (defcustom blink-matching-paren-on-screen t
3134 "*Non-nil means show matching open-paren when it is on screen.
3135 If nil, means don't show it (but the open-paren can still be shown
3136 when it is off screen)."
3137 :type 'boolean
3138 :group 'paren-blinking)
3140 (defcustom blink-matching-paren-distance (* 25 1024)
3141 "*If non-nil, is maximum distance to search for matching open-paren."
3142 :type 'integer
3143 :group 'paren-blinking)
3145 (defcustom blink-matching-delay 1
3146 "*Time in seconds to delay after showing a matching paren."
3147 :type 'number
3148 :group 'paren-blinking)
3150 (defcustom blink-matching-paren-dont-ignore-comments nil
3151 "*Non-nil means `blink-matching-paren' will not ignore comments."
3152 :type 'boolean
3153 :group 'paren-blinking)
3155 (defun blink-matching-open ()
3156 "Move cursor momentarily to the beginning of the sexp before point."
3157 (interactive)
3158 (and (> (point) (1+ (point-min)))
3159 blink-matching-paren
3160 ;; Verify an even number of quoting characters precede the close.
3161 (= 1 (logand 1 (- (point)
3162 (save-excursion
3163 (forward-char -1)
3165 (point)))))
3166 (let* ((oldpos (point))
3167 (blinkpos)
3168 (mismatch))
3169 (save-excursion
3170 (save-restriction
3171 (if blink-matching-paren-distance
3172 (narrow-to-region (max (point-min)
3173 (- (point) blink-matching-paren-distance))
3174 oldpos))
3175 (condition-case ()
3176 (let ((parse-sexp-ignore-comments
3177 (and parse-sexp-ignore-comments
3178 (not blink-matching-paren-dont-ignore-comments))))
3179 (setq blinkpos (scan-sexps oldpos -1)))
3180 (error nil)))
3181 (and blinkpos
3182 (/= (char-syntax (char-after blinkpos))
3183 ?\$)
3184 (setq mismatch
3185 (or (null (matching-paren (char-after blinkpos)))
3186 (/= (char-after (1- oldpos))
3187 (matching-paren (char-after blinkpos))))))
3188 (if mismatch (setq blinkpos nil))
3189 (if blinkpos
3190 ;; Don't log messages about paren matching.
3191 (let (message-log-max)
3192 (goto-char blinkpos)
3193 (if (pos-visible-in-window-p)
3194 (and blink-matching-paren-on-screen
3195 (sit-for blink-matching-delay))
3196 (goto-char blinkpos)
3197 (message
3198 "Matches %s"
3199 ;; Show what precedes the open in its line, if anything.
3200 (if (save-excursion
3202 (not (bolp)))
3203 (buffer-substring (progn (beginning-of-line) (point))
3204 (1+ blinkpos))
3205 ;; Show what follows the open in its line, if anything.
3206 (if (save-excursion
3207 (forward-char 1)
3209 (not (eolp)))
3210 (buffer-substring blinkpos
3211 (progn (end-of-line) (point)))
3212 ;; Otherwise show the previous nonblank line,
3213 ;; if there is one.
3214 (if (save-excursion
3216 (not (bobp)))
3217 (concat
3218 (buffer-substring (progn
3220 (beginning-of-line)
3221 (point))
3222 (progn (end-of-line)
3224 (point)))
3225 ;; Replace the newline and other whitespace with `...'.
3226 "..."
3227 (buffer-substring blinkpos (1+ blinkpos)))
3228 ;; There is nothing to show except the char itself.
3229 (buffer-substring blinkpos (1+ blinkpos))))))))
3230 (cond (mismatch
3231 (message "Mismatched parentheses"))
3232 ((not blink-matching-paren-distance)
3233 (message "Unmatched parenthesis"))))))))
3235 ;Turned off because it makes dbx bomb out.
3236 (setq blink-paren-function 'blink-matching-open)
3238 ;; This executes C-g typed while Emacs is waiting for a command.
3239 ;; Quitting out of a program does not go through here;
3240 ;; that happens in the QUIT macro at the C code level.
3241 (defun keyboard-quit ()
3242 "Signal a `quit' condition.
3243 During execution of Lisp code, this character causes a quit directly.
3244 At top-level, as an editor command, this simply beeps."
3245 (interactive)
3246 (deactivate-mark)
3247 (signal 'quit nil))
3249 (define-key global-map "\C-g" 'keyboard-quit)
3251 (defvar buffer-quit-function nil
3254 \(such as cancelling a prefix argument, minibuffer or region) do not apply.")
3256 (defun keyboard-escape-quit ()
3258 This command can exit an interactive command such as `query-replace',
3259 can clear out a prefix argument or a region,
3260 can get out of the minibuffer or other recursive edit,
3261 cancel the use of the current buffer (for special-purpose buffers),
3262 or go back to just one window (by deleting all but the selected window)."
3263 (interactive)
3264 (cond ((eq last-command 'mode-exited) nil)
3265 ((> (minibuffer-depth) 0)
3266 (abort-recursive-edit))
3267 (current-prefix-arg
3268 nil)
3269 ((and transient-mark-mode
3270 mark-active)
3271 (deactivate-mark))
3272 ((> (recursion-depth) 0)
3273 (exit-recursive-edit))
3274 (buffer-quit-function
3275 (funcall buffer-quit-function))
3276 ((not (one-window-p t))
3277 (delete-other-windows))
3279 (bury-buffer))))
3281 (define-key global-map "\e\e\e" 'keyboard-escape-quit)
3283 (defcustom read-mail-command 'rmail
3284 "*Your preference for a mail reading package.
3285 This is used by some keybindings which support reading mail.
3286 See also `mail-user-agent' concerning sending mail."
3287 :type '(choice (function-item rmail)
3288 (function-item gnus)
3289 (function-item mh-rmail)
3290 (function :tag "Other"))
3291 :version "21.1"
3292 :group 'mail)
3294 (defcustom mail-user-agent 'sendmail-user-agent
3295 "*Your preference for a mail composition package.
3296 Various Emacs Lisp packages (e.g. Reporter) require you to compose an
3297 outgoing email message. This variable lets you specify which
3298 mail-sending package you prefer.
3300 Valid values include:
3302 `sendmail-user-agent' -- use the default Emacs Mail package.
3303 See Info node `(emacs)Sending Mail'.
3304 `mh-e-user-agent' -- use the Emacs interface to the MH mail system.
3305 See Info node `(mh-e)'.
3306 `message-user-agent' -- use the Gnus Message package.
3307 See Info node `(message)'.
3308 `gnus-user-agent' -- like `message-user-agent', but with Gnus
3309 paraphernalia, particularly the Gcc: header for
3310 archiving.
3312 Additional valid symbols may be available; check with the author of
3313 your package for details. The function should return non-nil if it
3314 succeeds.
3316 See also `read-mail-command' concerning reading mail."
3317 :type '(radio (function-item :tag "Default Emacs mail"
3319 sendmail-user-agent)
3320 (function-item :tag "Emacs interface to MH"
3322 mh-e-user-agent)
3323 (function-item :tag "Gnus Message package"
3325 message-user-agent)
3326 (function-item :tag "Gnus Message with full Gnus features"
3328 gnus-user-agent)
3329 (function :tag "Other"))
3330 :group 'mail)
3332 (defun define-mail-user-agent (symbol composefunc sendfunc
3333 &optional abortfunc hookvar)
3334 "Define a symbol to identify a mail-sending package for `mail-user-agent'.
3336 SYMBOL can be any Lisp symbol. Its function definition and/or
3337 value as a variable do not matter for this usage; we use only certain
3338 properties on its property list, to encode the rest of the arguments.
3340 COMPOSEFUNC is program callable function that composes an outgoing
3341 mail message buffer. This function should set up the basics of the
3342 buffer without requiring user interaction. It should populate the
3343 standard mail headers, leaving the `to:' and `subject:' headers blank
3344 by default.
3346 COMPOSEFUNC should accept several optional arguments--the same
3347 arguments that `compose-mail' takes. See that function's documentation.
3349 SENDFUNC is the command a user would run to send the message.
3351 Optional ABORTFUNC is the command a user would run to abort the
3352 message. For mail packages that don't have a separate abort function,
3353 this can be `kill-buffer' (the equivalent of omitting this argument).
3355 Optional HOOKVAR is a hook variable that gets run before the message
3356 is actually sent. Callers that use the `mail-user-agent' may
3357 install a hook function temporarily on this hook variable.
3358 If HOOKVAR is nil, `mail-send-hook' is used.
3360 The properties used on SYMBOL are `composefunc', `sendfunc',
3361 `abortfunc', and `hookvar'."
3362 (put symbol 'composefunc composefunc)
3363 (put symbol 'sendfunc sendfunc)
3364 (put symbol 'abortfunc (or abortfunc 'kill-buffer))
3365 (put symbol 'hookvar (or hookvar 'mail-send-hook)))
3367 (define-mail-user-agent 'sendmail-user-agent
3368 'sendmail-user-agent-compose
3369 'mail-send-and-exit)
3371 (defun rfc822-goto-eoh ()
3372 ;; Go to header delimiter line in a mail message, following RFC822 rules
3373 (goto-char (point-min))
3374 (when (re-search-forward
3376 (goto-char (match-beginning 0))))
3378 (defun sendmail-user-agent-compose (&optional to subject other-headers continue
3379 switch-function yank-action
3380 send-actions)
3381 (if switch-function
3382 (let ((special-display-buffer-names nil)
3383 (special-display-regexps nil)
3384 (same-window-buffer-names nil)
3385 (same-window-regexps nil))
3386 (funcall switch-function "*mail*")))
3387 (let ((cc (cdr (assoc-ignore-case "cc" other-headers)))
3388 (in-reply-to (cdr (assoc-ignore-case "in-reply-to" other-headers)))
3389 (body (cdr (assoc-ignore-case "body" other-headers))))
3390 (or (mail continue to subject in-reply-to cc yank-action send-actions)
3391 continue
3392 (error "Message aborted"))
3393 (save-excursion
3394 (rfc822-goto-eoh)
3395 (while other-headers
3396 (unless (member-ignore-case (car (car other-headers))
3397 '("in-reply-to" "cc" "body"))
3398 (insert (car (car other-headers)) ": "
3400 (setq other-headers (cdr other-headers)))
3401 (when body
3402 (forward-line 1)
3403 (insert body))
3404 t)))
3406 (define-mail-user-agent 'mh-e-user-agent
3407 'mh-smail-batch 'mh-send-letter 'mh-fully-kill-draft
3408 'mh-before-send-letter-hook)
3410 (defun compose-mail (&optional to subject other-headers continue
3411 switch-function yank-action send-actions)
3412 "Start composing a mail message to send.
3413 This uses the user's chosen mail composition package
3414 as selected with the variable `mail-user-agent'.
3415 The optional arguments TO and SUBJECT specify recipients
3416 and the initial Subject field, respectively.
3418 OTHER-HEADERS is an alist specifying additional
3419 header fields. Elements look like (HEADER . VALUE) where both
3420 HEADER and VALUE are strings.
3422 CONTINUE, if non-nil, says to continue editing a message already
3423 being composed.
3425 SWITCH-FUNCTION, if non-nil, is a function to use to
3426 switch to and display the buffer used for mail composition.
3428 YANK-ACTION, if non-nil, is an action to perform, if and when necessary,
3429 to insert the raw text of the message being replied to.
3430 It has the form (FUNCTION . ARGS). The user agent will apply
3431 FUNCTION to ARGS, to insert the raw text of the original message.
3432 \(The user agent will also run `mail-citation-hook', *after* the
3433 original text has been inserted in this way.)
3435 SEND-ACTIONS is a list of actions to call when the message is sent.
3436 Each action has the form (FUNCTION . ARGS)."
3437 (interactive
3438 (list nil nil nil current-prefix-arg))
3439 (let ((function (get mail-user-agent 'composefunc)))
3440 (funcall function to subject other-headers continue
3441 switch-function yank-action send-actions)))
3443 (defun compose-mail-other-window (&optional to subject other-headers continue
3444 yank-action send-actions)
3446 (interactive
3447 (list nil nil nil current-prefix-arg))
3448 (compose-mail to subject other-headers continue
3449 'switch-to-buffer-other-window yank-action send-actions))
3452 (defun compose-mail-other-frame (&optional to subject other-headers continue
3453 yank-action send-actions)
3455 (interactive
3456 (list nil nil nil current-prefix-arg))
3457 (compose-mail to subject other-headers continue
3458 'switch-to-buffer-other-frame yank-action send-actions))
3460 (defvar set-variable-value-history nil
3461 "History of values entered with `set-variable'.")
3463 (defun set-variable (var val)
3464 "Set VARIABLE to VALUE. VALUE is a Lisp object.
3465 When using this interactively, enter a Lisp object for VALUE.
3466 If you want VALUE to be a string, you must surround it with doublequotes.
3467 VALUE is used literally, not evaluated.
3469 If VARIABLE has a `variable-interactive' property, that is used as if
3470 it were the arg to `interactive' (which see) to interactively read VALUE.
3472 If VARIABLE has been defined with `defcustom', then the type information
3473 in the definition is used to check that VALUE is valid."
3474 (interactive
3475 (let* ((default-var (variable-at-point))
3476 (var (if (symbolp default-var)
3477 (read-variable (format "Set variable (default %s): " default-var)
3478 default-var)
3479 (read-variable "Set variable: ")))
3480 (minibuffer-help-form '(describe-variable var))
3481 (prop (get var 'variable-interactive))
3482 (prompt (format "Set %s to value: " var))
3483 (val (if prop
3484 ;; Use VAR's `variable-interactive' property
3485 ;; as an interactive spec for prompting.
3486 (call-interactively `(lambda (arg)
3487 (interactive ,prop)
3488 arg))
3489 (read
3490 (read-string prompt nil
3491 'set-variable-value-history)))))
3492 (list var val)))
3494 (let ((type (get var 'custom-type)))
3495 (when type
3496 ;; Match with custom type.
3497 (require 'cus-edit)
3498 (setq type (widget-convert type))
3499 (unless (widget-apply type :match val)
3500 (error "Value `%S' does not match type %S of %S"
3501 val (car type) var))))
3502 (set var val)
3504 ;; Force a thorough redisplay for the case that the variable
3505 ;; has an effect on the display, like `tab-width' has.
3506 (force-mode-line-update))
3508 ;; Define the major mode for lists of completions.
3510 (defvar completion-list-mode-map nil
3511 "Local map for completion list buffers.")
3512 (or completion-list-mode-map
3513 (let ((map (make-sparse-keymap)))
3514 (define-key map [mouse-2] 'mouse-choose-completion)
3515 (define-key map [down-mouse-2] nil)
3516 (define-key map "\C-m" 'choose-completion)
3517 (define-key map "\e\e\e" 'delete-completion-window)
3518 (define-key map [left] 'previous-completion)
3519 (define-key map [right] 'next-completion)
3520 (setq completion-list-mode-map map)))
3522 ;; Completion mode is suitable only for specially formatted data.
3523 (put 'completion-list-mode 'mode-class 'special)
3525 (defvar completion-reference-buffer nil
3526 "Record the buffer that was current when the completion list was requested.
3527 This is a local variable in the completion list buffer.
3528 Initial value is nil to avoid some compiler warnings.")
3530 (defvar completion-no-auto-exit nil
3531 "Non-nil means `choose-completion-string' should never exit the minibuffer.
3532 This also applies to other functions such as `choose-completion'
3533 and `mouse-choose-completion'.")
3535 (defvar completion-base-size nil
3536 "Number of chars at beginning of minibuffer not involved in completion.
3537 This is a local variable in the completion list buffer
3538 but it talks about the buffer in `completion-reference-buffer'.
3539 If this is nil, it means to compare text to determine which part
3540 of the tail end of the buffer's text is involved in completion.")
3542 (defun delete-completion-window ()
3543 "Delete the completion list window.
3544 Go to the window from which completion was requested."
3545 (interactive)
3546 (let ((buf completion-reference-buffer))
3547 (if (one-window-p t)
3548 (if (window-dedicated-p (selected-window))
3549 (delete-frame (selected-frame)))
3550 (delete-window (selected-window))
3551 (if (get-buffer-window buf)
3552 (select-window (get-buffer-window buf))))))
3554 (defun previous-completion (n)
3555 "Move to the previous item in the completion list."
3556 (interactive "p")
3557 (next-completion (- n)))
3559 (defun next-completion (n)
3560 "Move to the next item in the completion list.
3561 With prefix argument N, move N items (negative N means move backward)."
3562 (interactive "p")
3563 (let ((beg (point-min)) (end (point-max)))
3564 (while (and (> n 0) (not (eobp)))
3565 ;; If in a completion, move to the end of it.
3566 (when (get-text-property (point) 'mouse-face)
3567 (goto-char (next-single-property-change (point) 'mouse-face nil end)))
3568 ;; Move to start of next one.
3569 (unless (get-text-property (point) 'mouse-face)
3570 (goto-char (next-single-property-change (point) 'mouse-face nil end)))
3571 (setq n (1- n)))
3572 (while (and (< n 0) (not (bobp)))
3573 (let ((prop (get-text-property (1- (point)) 'mouse-face)))
3574 ;; If in a completion, move to the start of it.
3575 (when (and prop (eq prop (get-text-property (point) 'mouse-face)))
3576 (goto-char (previous-single-property-change
3577 (point) 'mouse-face nil beg)))
3578 ;; Move to end of the previous completion.
3579 (unless (or (bobp) (get-text-property (1- (point)) 'mouse-face))
3580 (goto-char (previous-single-property-change
3581 (point) 'mouse-face nil beg)))
3582 ;; Move to the start of that one.
3583 (goto-char (previous-single-property-change
3584 (point) 'mouse-face nil beg))
3585 (setq n (1+ n))))))
3587 (defun choose-completion ()
3588 "Choose the completion that point is in or next to."
3589 (interactive)
3590 (let (beg end completion (buffer completion-reference-buffer)
3591 (base-size completion-base-size))
3592 (if (and (not (eobp)) (get-text-property (point) 'mouse-face))
3593 (setq end (point) beg (1+ (point))))
3594 (if (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face))
3595 (setq end (1- (point)) beg (point)))
3596 (if (null beg)
3597 (error "No completion here"))
3598 (setq beg (previous-single-property-change beg 'mouse-face))
3599 (setq end (or (next-single-property-change end 'mouse-face) (point-max)))
3600 (setq completion (buffer-substring beg end))
3601 (let ((owindow (selected-window)))
3602 (if (and (one-window-p t 'selected-frame)
3603 (window-dedicated-p (selected-window)))
3604 ;; This is a special buffer's frame
3605 (iconify-frame (selected-frame))
3606 (or (window-dedicated-p (selected-window))
3607 (bury-buffer)))
3608 (select-window owindow))
3609 (choose-completion-string completion buffer base-size)))
3611 ;; Delete the longest partial match for STRING
3612 ;; that can be found before POINT.
3613 (defun choose-completion-delete-max-match (string)
3614 (let ((opoint (point))
3615 (len (min (length string)
3616 (- (point) (point-min)))))
3617 (goto-char (- (point) (length string)))
3618 (if completion-ignore-case
3619 (setq string (downcase string)))
3620 (while (and (> len 0)
3621 (let ((tail (buffer-substring (point)
3622 (+ (point) len))))
3623 (if completion-ignore-case
3624 (setq tail (downcase tail)))
3625 (not (string= tail (substring string 0 len)))))
3626 (setq len (1- len))
3627 (forward-char 1))
3628 (delete-char len)))
3630 ;; Switch to BUFFER and insert the completion choice CHOICE.
3631 ;; BASE-SIZE, if non-nil, says how many characters of BUFFER's text
3632 ;; to keep. If it is nil, use choose-completion-delete-max-match instead.
3634 ;; If BUFFER is the minibuffer, exit the minibuffer
3635 ;; unless it is reading a file name and CHOICE is a directory,
3636 ;; or completion-no-auto-exit is non-nil.
3637 (defun choose-completion-string (choice &optional buffer base-size)
3638 (let ((buffer (or buffer completion-reference-buffer))
3640 ;; If BUFFER is a minibuffer, barf unless it's the currently
3641 ;; active minibuffer.
3642 (if (and mini-p
3643 (or (not (active-minibuffer-window))
3644 (not (equal buffer
3645 (window-buffer (active-minibuffer-window))))))
3646 (error "Minibuffer is not active for completion")
3647 ;; Insert the completion into the buffer where completion was requested.
3648 (set-buffer buffer)
3649 (if base-size
3650 (delete-region (+ base-size (if mini-p
3651 (minibuffer-prompt-end)
3652 (point-min)))
3653 (point))
3654 (choose-completion-delete-max-match choice))
3655 (insert choice)
3656 (remove-text-properties (- (point) (length choice)) (point)
3657 '(mouse-face nil))
3658 ;; Update point in the window that BUFFER is showing in.
3659 (let ((window (get-buffer-window buffer t)))
3660 (set-window-point window (point)))
3661 ;; If completing for the minibuffer, exit it with this choice.
3662 (and (not completion-no-auto-exit)
3663 (equal buffer (window-buffer (minibuffer-window)))
3664 minibuffer-completion-table
3665 ;; If this is reading a file name, and the file name chosen
3666 ;; is a directory, don't exit the minibuffer.
3667 (if (and (eq minibuffer-completion-table 'read-file-name-internal)
3668 (file-directory-p (field-string (point-max))))
3669 (let ((mini (active-minibuffer-window)))
3670 (select-window mini)
3671 (when minibuffer-auto-raise
3672 (raise-frame (window-frame mini))))
3673 (exit-minibuffer))))))
3675 (defun completion-list-mode ()
3676 "Major mode for buffers showing lists of possible completions.
3678 to select the completion near point.
3680 with the mouse."
3681 (interactive)
3682 (kill-all-local-variables)
3683 (use-local-map completion-list-mode-map)
3684 (setq mode-name "Completion List")
3685 (setq major-mode 'completion-list-mode)
3686 (make-local-variable 'completion-base-size)
3687 (setq completion-base-size nil)
3688 (run-hooks 'completion-list-mode-hook))
3690 (defun completion-list-mode-finish ()
3691 "Finish setup of the completions buffer.
3692 Called from `temp-buffer-show-hook'."
3693 (when (eq major-mode 'completion-list-mode)
3694 (toggle-read-only 1)))
3696 (add-hook 'temp-buffer-show-hook 'completion-list-mode-finish)
3698 (defvar completion-setup-hook nil
3699 "Normal hook run at the end of setting up a completion list buffer.
3700 When this hook is run, the current buffer is the one in which the
3701 command to display the completion list buffer was run.
3702 The completion list buffer is available as the value of `standard-output'.")
3704 ;; This function goes in completion-setup-hook, so that it is called
3705 ;; after the text of the completion list buffer is written.
3707 (defun completion-setup-function ()
3708 (save-excursion
3709 (let ((mainbuf (current-buffer)))
3710 (set-buffer standard-output)
3711 (completion-list-mode)
3712 (make-local-variable 'completion-reference-buffer)
3713 (setq completion-reference-buffer mainbuf)
3714 (if (eq minibuffer-completion-table 'read-file-name-internal)
3715 ;; For file name completion,
3716 ;; use the number of chars before the start of the
3717 ;; last file name component.
3718 (setq completion-base-size
3719 (save-excursion
3720 (set-buffer mainbuf)
3721 (goto-char (point-max))
3722 (skip-chars-backward (format "^%c" directory-sep-char))
3723 (- (point) (minibuffer-prompt-end))))
3724 ;; Otherwise, in minibuffer, the whole input is being completed.
3725 (save-match-data
3727 (buffer-name mainbuf))
3728 (setq completion-base-size 0))))
3729 (goto-char (point-min))
3730 (if (display-mouse-p)
3731 (insert (substitute-command-keys
3733 (insert (substitute-command-keys
3737 (add-hook 'completion-setup-hook 'completion-setup-function)
3739 (define-key minibuffer-local-completion-map [prior]
3740 'switch-to-completions)
3741 (define-key minibuffer-local-must-match-map [prior]
3742 'switch-to-completions)
3743 (define-key minibuffer-local-completion-map "\M-v"
3744 'switch-to-completions)
3745 (define-key minibuffer-local-must-match-map "\M-v"
3746 'switch-to-completions)
3748 (defun switch-to-completions ()
3749 "Select the completion list window."
3750 (interactive)
3751 ;; Make sure we have a completions window.
3752 (or (get-buffer-window "*Completions*")
3753 (minibuffer-completion-help))
3754 (let ((window (get-buffer-window "*Completions*")))
3755 (when window
3756 (select-window window)
3757 (goto-char (point-min))
3759 (forward-line 1))))
3761 ;; Support keyboard commands to turn on various modifiers.
3763 ;; These functions -- which are not commands -- each add one modifier
3764 ;; to the following event.
3766 (defun event-apply-alt-modifier (ignore-prompt)
3767 "Add the Alt modifier to the following event.
3769 (vector (event-apply-modifier (read-event) 'alt 22 "A-")))
3770 (defun event-apply-super-modifier (ignore-prompt)
3771 "Add the Super modifier to the following event.
3773 (vector (event-apply-modifier (read-event) 'super 23 "s-")))
3774 (defun event-apply-hyper-modifier (ignore-prompt)
3775 "Add the Hyper modifier to the following event.
3777 (vector (event-apply-modifier (read-event) 'hyper 24 "H-")))
3778 (defun event-apply-shift-modifier (ignore-prompt)
3779 "Add the Shift modifier to the following event.
3781 (vector (event-apply-modifier (read-event) 'shift 25 "S-")))
3782 (defun event-apply-control-modifier (ignore-prompt)
3783 "Add the Ctrl modifier to the following event.
3785 (vector (event-apply-modifier (read-event) 'control 26 "C-")))
3786 (defun event-apply-meta-modifier (ignore-prompt)
3787 "Add the Meta modifier to the following event.
3789 (vector (event-apply-modifier (read-event) 'meta 27 "M-")))
3791 (defun event-apply-modifier (event symbol lshiftby prefix)
3792 "Apply a modifier flag to event EVENT.
3793 SYMBOL is the name of this modifier, as a symbol.
3794 LSHIFTBY is the numeric value of this modifier, in keyboard events.
3795 PREFIX is the string that represents this modifier in an event type symbol."
3796 (if (numberp event)
3797 (cond ((eq symbol 'control)
3798 (if (and (<= (downcase event) ?z)
3799 (>= (downcase event) ?a))
3800 (- (downcase event) ?a -1)
3801 (if (and (<= (downcase event) ?Z)
3802 (>= (downcase event) ?A))
3803 (- (downcase event) ?A -1)
3804 (logior (lsh 1 lshiftby) event))))
3805 ((eq symbol 'shift)
3806 (if (and (<= (downcase event) ?z)
3807 (>= (downcase event) ?a))
3808 (upcase event)
3809 (logior (lsh 1 lshiftby) event)))
3810 (t
3811 (logior (lsh 1 lshiftby) event)))
3812 (if (memq symbol (event-modifiers event))
3813 event
3814 (let ((event-type (if (symbolp event) event (car event))))
3815 (setq event-type (intern (concat prefix (symbol-name event-type))))
3816 (if (symbolp event)
3817 event-type
3818 (cons event-type (cdr event)))))))
3820 (define-key function-key-map [?\C-x ?@ ?h] 'event-apply-hyper-modifier)
3821 (define-key function-key-map [?\C-x ?@ ?s] 'event-apply-super-modifier)
3822 (define-key function-key-map [?\C-x ?@ ?m] 'event-apply-meta-modifier)
3823 (define-key function-key-map [?\C-x ?@ ?a] 'event-apply-alt-modifier)
3824 (define-key function-key-map [?\C-x ?@ ?S] 'event-apply-shift-modifier)
3825 (define-key function-key-map [?\C-x ?@ ?c] 'event-apply-control-modifier)
3827 ;;;; Keypad support.
3829 ;;; Make the keypad keys act like ordinary typing keys. If people add
3830 ;;; bindings for the function key symbols, then those bindings will
3831 ;;; override these, so this shouldn't interfere with any existing
3832 ;;; bindings.
3834 ;; Also tell read-char how to handle these keys.
3835 (mapc
3836 (lambda (keypad-normal)
3837 (let ((keypad (nth 0 keypad-normal))
3838 (normal (nth 1 keypad-normal)))
3839 (put keypad 'ascii-character normal)
3840 (define-key function-key-map (vector keypad) (vector normal))))
3841 '((kp-0 ?0) (kp-1 ?1) (kp-2 ?2) (kp-3 ?3) (kp-4 ?4)
3842 (kp-5 ?5) (kp-6 ?6) (kp-7 ?7) (kp-8 ?8) (kp-9 ?9)
3843 (kp-space ?\ )
3846 (kp-multiply ?*)
3847 (kp-add ?+)
3848 (kp-separator ?,)
3849 (kp-subtract ?-)
3850 (kp-decimal ?.)
3851 (kp-divide ?/)
3852 (kp-equal ?=)))
3854 ;;;;
3855 ;;;; forking a twin copy of a buffer.
3856 ;;;;
3858 (defvar clone-buffer-hook nil
3859 "Normal hook to run in the new buffer at the end of `clone-buffer'.")
3861 (defun clone-process (process &optional newname)
3862 "Create a twin copy of PROCESS.
3863 If NEWNAME is nil, it defaults to PROCESS' name;
3864 NEWNAME is modified by adding or incrementing <N> at the end as necessary.
3865 If PROCESS is associated with a buffer, the new process will be associated
3866 with the current buffer instead.
3867 Returns nil if PROCESS has already terminated."
3868 (setq newname (or newname (process-name process)))
3870 (setq newname (substring newname 0 (match-beginning 0))))
3871 (when (memq (process-status process) '(run stop open))
3872 (let* ((process-connection-type (process-tty-name process))
3873 (old-kwoq (process-kill-without-query process nil))
3874 (new-process
3875 (if (memq (process-status process) '(open))
3876 (apply 'open-network-stream newname
3877 (if (process-buffer process) (current-buffer))
3878 (process-contact process))
3879 (apply 'start-process newname
3880 (if (process-buffer process) (current-buffer))
3881 (process-command process)))))
3882 (process-kill-without-query new-process old-kwoq)
3883 (process-kill-without-query process old-kwoq)
3884 (set-process-inherit-coding-system-flag
3885 new-process (process-inherit-coding-system-flag process))
3886 (set-process-filter new-process (process-filter process))
3887 (set-process-sentinel new-process (process-sentinel process))
3888 new-process)))
3890 ;; things to maybe add (currently partly covered by `funcall mode':
3891 ;; - syntax-table
3892 ;; - overlays
3893 (defun clone-buffer (&optional newname display-flag)
3894 "Create a twin copy of the current buffer.
3895 If NEWNAME is nil, it defaults to the current buffer's name;
3896 NEWNAME is modified by adding or incrementing <N> at the end as necessary.
3898 If DISPLAY-FLAG is non-nil, the new buffer is shown with `pop-to-buffer'.
3899 This runs the normal hook `clone-buffer-hook' in the new buffer
3900 after it has been set up properly in other respects."
3901 (interactive
3902 (progn
3903 (if buffer-file-name
3904 (error "Cannot clone a file-visiting buffer"))
3905 (if (get major-mode 'no-clone)
3906 (error "Cannot clone a buffer in %s mode" mode-name))
3907 (list (if current-prefix-arg (read-string "Name: "))
3908 t)))
3909 (if buffer-file-name
3910 (error "Cannot clone a file-visiting buffer"))
3911 (if (get major-mode 'no-clone)
3912 (error "Cannot clone a buffer in %s mode" mode-name))
3913 (setq newname (or newname (buffer-name)))
3915 (setq newname (substring newname 0 (match-beginning 0))))
3916 (let ((buf (current-buffer))
3917 (ptmin (point-min))
3918 (ptmax (point-max))
3919 (pt (point))
3920 (mk (if mark-active (mark t)))
3921 (modified (buffer-modified-p))
3922 (mode major-mode)
3923 (lvars (buffer-local-variables))
3924 (process (get-buffer-process (current-buffer)))
3925 (new (generate-new-buffer (or newname (buffer-name)))))
3926 (save-restriction
3927 (widen)
3928 (with-current-buffer new
3929 (insert-buffer-substring buf)))
3930 (with-current-buffer new
3931 (narrow-to-region ptmin ptmax)
3932 (goto-char pt)
3933 (if mk (set-mark mk))
3934 (set-buffer-modified-p modified)
3936 ;; Clone the old buffer's process, if any.
3937 (when process (clone-process process))
3939 ;; Now set up the major mode.
3940 (funcall mode)
3942 ;; Set up other local variables.
3943 (mapcar (lambda (v)
3944 (condition-case () ;in case var is read-only
3945 (if (symbolp v)
3946 (makunbound v)
3947 (set (make-local-variable (car v)) (cdr v)))
3948 (error nil)))
3949 lvars)
3951 ;; Run any hooks (typically set up by the major mode
3952 ;; for cloning to work properly).
3953 (run-hooks 'clone-buffer-hook))
3954 (if display-flag (pop-to-buffer new))
3955 new))
3958 (defun clone-indirect-buffer (newname display-flag &optional norecord)
3959 "Create an indirect buffer that is a twin copy of the current buffer.
3961 Give the indirect buffer name NEWNAME. Interactively, read NEW-NAME
3962 from the minibuffer when invoked with a prefix arg. If NEWNAME is nil
3963 or if not called with a prefix arg, NEWNAME defaults to the current
3964 buffer's name. The name is modified by adding a `<N>' suffix to it
3965 or by incrementing the N in an existing suffix.
3967 DISPLAY-FLAG non-nil means show the new buffer with `pop-to-buffer'.
3968 This is always done when called interactively.
3970 Optional last arg NORECORD non-nil means do not put this buffer at the
3971 front of the list of recently selected ones."
3972 (interactive
3973 (progn
3974 (if (get major-mode 'no-clone-indirect)
3975 (error "Cannot indirectly clone a buffer in %s mode" mode-name))
3976 (list (if current-prefix-arg
3977 (read-string "BName of indirect buffer: "))
3978 t)))
3979 (if (get major-mode 'no-clone-indirect)
3980 (error "Cannot indirectly clone a buffer in %s mode" mode-name))
3981 (setq newname (or newname (buffer-name)))
3983 (setq newname (substring newname 0 (match-beginning 0))))
3984 (let* ((name (generate-new-buffer-name newname))
3985 (buffer (make-indirect-buffer (current-buffer) name t)))
3986 (when display-flag
3987 (pop-to-buffer buffer norecord))
3988 buffer))
3991 (defun clone-indirect-buffer-other-window (buffer &optional norecord)
3992 "Create an indirect buffer that is a twin copy of BUFFER.
3993 Select the new buffer in another window.
3994 Optional second arg NORECORD non-nil means do not put this buffer at
3995 the front of the list of recently selected ones."
3996 (interactive "bClone buffer in other window: ")
3997 (let ((popup-windows t))
3998 (set-buffer buffer)
3999 (clone-indirect-buffer nil t norecord)))
4001 (define-key ctl-x-4-map "c" 'clone-indirect-buffer-other-window)
4004 ;;; Syntax stuff.
4006 (defconst syntax-code-table
4007 '((?\ 0 "whitespace")
4008 (?- 0 "whitespace")
4009 (?. 1 "punctuation")
4010 (?w 2 "word")
4011 (?_ 3 "symbol")
4012 (?\( 4 "open parenthesis")
4013 (?\) 5 "close parenthesis")
4016 (?$ 8 "paired delimiter")
4018 (?/ 10 "character quote")
4019 (?< 11 "comment start")
4020 (?> 12 "comment end")
4021 (?@ 13 "inherit")
4022 (nil 14 "comment fence")
4023 (nil 15 "string fence"))
4024 "Alist of forms (CHAR CODE DESCRIPTION) mapping characters to syntax info.
4025 CHAR is a character that is allowed as first char in the string
4026 specifying the syntax when calling `modify-syntax-entry'. CODE is the
4027 corresponing syntax code as it is stored in a syntax cell, and
4028 can be used as value of a `syntax-table' property.
4029 DESCRIPTION is the descriptive string for the syntax.")
4032 ;;; Handling of Backspace and Delete keys.
4034 (defcustom normal-erase-is-backspace nil
4035 "If non-nil, Delete key deletes forward and Backspace key deletes backward.
4037 On window systems, the default value of this option is chosen
4038 according to the keyboard used. If the keyboard has both a Backspace
4039 key and a Delete key, and both are mapped to their usual meanings, the
4040 option's default value is set to t, so that Backspace can be used to
4041 delete backward, and Delete can be used to delete forward.
4043 If not running under a window system, customizing this option accomplishes
4044 a similar effect by mapping C-h, which is usually generated by the
4045 Backspace key, to DEL, and by mapping DEL to C-d via
4046 `keyboard-translate'. The former functionality of C-h is available on
4047 the F1 key. You should probably not use this setting if you don't
4048 have both Backspace, Delete and F1 keys.
4050 Setting this variable with setq doesn't take effect. Programmatically,
4051 call `normal-erase-is-backspace-mode' (which see) instead."
4052 :type 'boolean
4053 :group 'editing-basics
4054 :version "21.1"
4055 :set (lambda (symbol value)
4056 ;; The fboundp is because of a problem with :set when
4057 ;; dumping Emacs. It doesn't really matter.
4058 (if (fboundp 'normal-erase-is-backspace-mode)
4059 (normal-erase-is-backspace-mode (or value 0))
4060 (set-default symbol value))))
4063 (defun normal-erase-is-backspace-mode (&optional arg)
4064 "Toggle the Erase and Delete mode of the Backspace and Delete keys.
4066 With numeric arg, turn the mode on if and only if ARG is positive.
4068 On window systems, when this mode is on, Delete is mapped to C-d and
4069 Backspace is mapped to DEL; when this mode is off, both Delete and
4070 Backspace are mapped to DEL. (The remapping goes via
4071 `function-key-map', so binding Delete or Backspace in the global or
4072 local keymap will override that.)
4074 In addition, on window systems, the bindings of C-Delete, M-Delete,
4075 C-M-Delete, C-Backspace, M-Backspace, and C-M-Backspace are changed in
4076 the global keymap in accordance with the functionality of Delete and
4077 Backspace. For example, if Delete is remapped to C-d, which deletes
4078 forward, C-Delete is bound to `kill-word', but if Delete is remapped
4079 to DEL, which deletes backward, C-Delete is bound to
4080 `backward-kill-word'.
4082 If not running on a window system, a similar effect is accomplished by
4083 remapping C-h (normally produced by the Backspace key) and DEL via
4084 `keyboard-translate': if this mode is on, C-h is mapped to DEL and DEL
4085 to C-d; if it's off, the keys are not remapped.
4087 When not running on a window system, and this mode is turned on, the
4088 former functionality of C-h is available on the F1 key. You should
4089 probably not turn on this mode on a text-only terminal if you don't
4090 have both Backspace, Delete and F1 keys.
4092 See also `normal-erase-is-backspace'."
4093 (interactive "P")
4094 (setq normal-erase-is-backspace
4095 (if arg
4096 (> (prefix-numeric-value arg) 0)
4097 (not normal-erase-is-backspace)))
4099 (cond ((or (memq window-system '(x w32 mac pc))
4100 (memq system-type '(ms-dos windows-nt)))
4101 (let ((bindings
4102 `(([C-delete] [C-backspace])
4103 ([M-delete] [M-backspace])
4104 ([C-M-delete] [C-M-backspace])
4105 (,esc-map
4106 [C-delete] [C-backspace])))
4107 (old-state (lookup-key function-key-map [delete])))
4109 (if normal-erase-is-backspace
4110 (progn
4111 (define-key function-key-map [delete] [?\C-d])
4112 (define-key function-key-map [kp-delete] [?\C-d])
4113 (define-key function-key-map [backspace] [?\C-?]))
4114 (define-key function-key-map [delete] [?\C-?])
4115 (define-key function-key-map [kp-delete] [?\C-?])
4116 (define-key function-key-map [backspace] [?\C-?]))
4118 ;; Maybe swap bindings of C-delete and C-backspace, etc.
4119 (unless (equal old-state (lookup-key function-key-map [delete]))
4120 (dolist (binding bindings)
4121 (let ((map global-map))
4122 (when (keymapp (car binding))
4123 (setq map (car binding) binding (cdr binding)))
4124 (let* ((key1 (nth 0 binding))
4125 (key2 (nth 1 binding))
4126 (binding1 (lookup-key map key1))
4127 (binding2 (lookup-key map key2)))
4128 (define-key map key1 binding2)
4129 (define-key map key2 binding1)))))))
4130 (t
4131 (if normal-erase-is-backspace
4132 (progn
4133 (keyboard-translate ?\C-h ?\C-?)
4134 (keyboard-translate ?\C-? ?\C-d))
4135 (keyboard-translate ?\C-h ?\C-h)
4136 (keyboard-translate ?\C-? ?\C-?))))
4138 (run-hooks 'normal-erase-is-backspace-hook)
4139 (if (interactive-p)
4140 (message "Delete key deletes %s"
4141 (if normal-erase-is-backspace "forward" "backward"))))
4144 ;;; Misc
4146 (defun byte-compiling-files-p ()
4147 "Return t if currently byte-compiling files."
4148 (and (boundp 'byte-compile-current-file)
4149 (stringp byte-compile-current-file)))
4152 ;; Minibuffer prompt stuff.
4154 ;(defun minibuffer-prompt-modification (start end)
4155 ; (error "You cannot modify the prompt"))
4156 ;
4157 ;
4158 ;(defun minibuffer-prompt-insertion (start end)
4159 ; (let ((inhibit-modification-hooks t))
4160 ; (delete-region start end)
4161 ; ;; Discard undo information for the text insertion itself
4162 ; ;; and for the text deletion.above.
4163 ; (when (consp buffer-undo-list)
4164 ; (setq buffer-undo-list (cddr buffer-undo-list)))
4165 ; (message "You cannot modify the prompt")))
4166 ;
4167 ;
4168 ;(setq minibuffer-prompt-properties
4169 ; (list 'modification-hooks '(minibuffer-prompt-modification)
4170 ; 'insert-in-front-hooks '(minibuffer-prompt-insertion)))
4171 ;
4173 ;;; simple.el ends here