(defgroup killing nil
"Killing and yanking commands"
:group 'editing)
(defgroup fill-comments nil
"Indenting and filling of comments."
:prefix "comment-"
:group 'fill)
(defgroup paren-matching nil
"Highlight (un)matching of parens and expressions."
:group 'matching)
(defun newline (&optional arg)
"Insert a newline, and move to left margin of the new line if it's blank.
The newline is marked with the text-property `hard'.
With arg, insert that many newlines.
In Auto Fill mode, if no numeric arg, break the preceding line if it's long."
(interactive "*P")
(barf-if-buffer-read-only)
(let ((flag (and (not (bobp))
(bolp)
(not after-change-function)
(not before-change-function)
(not after-change-functions)
(not before-change-functions)
(not (buffer-has-markers-at (1- (point))))
(not (buffer-has-markers-at (point)))
(not (get-char-property (1- (point)) 'modification-hooks))
(not (get-char-property (1- (point)) 'insert-behind-hooks))
(or (eobp)
(not (get-char-property (point) 'insert-in-front-hooks)))
(not (get-char-property (1- (point)) 'intangible))
(not (get-char-property (1- (point)) 'read-only))
(not (get-char-property (1- (point)) 'invisible))
(< (or (previous-property-change (point)) -2)
(- (point) 2))))
(was-page-start (and (bolp)
(looking-at page-delimiter)))
(beforepos (point)))
(if flag (backward-char 1))
(let ((last-command-char ?\n)
(auto-fill-function (if (or arg flag) nil auto-fill-function)))
(unwind-protect
(self-insert-command (prefix-numeric-value arg))
(if flag (forward-char 1))))
(if use-hard-newlines
(set-hard-newline-properties
(- (point) (if arg (prefix-numeric-value arg) 1)) (point)))
(or flag
(save-excursion
(goto-char beforepos)
(beginning-of-line)
(and (looking-at "[ \t]$")
(> (current-left-margin) 0)
(delete-region (point) (progn (end-of-line) (point))))))
(or was-page-start
(move-to-left-margin nil t)))
nil)
(defun set-hard-newline-properties (from to)
(let ((sticky (get-text-property from 'rear-nonsticky)))
(put-text-property from to 'hard 't)
(if (and (listp sticky) (not (memq 'hard sticky)))
(put-text-property from (point) 'rear-nonsticky
(cons 'hard sticky)))))
(defun open-line (arg)
"Insert a newline and leave point before it.
If there is a fill prefix and/or a left-margin, insert them on the new line
if the line would have been blank.
With arg N, insert N newlines."
(interactive "*p")
(let* ((do-fill-prefix (and fill-prefix (bolp)))
(do-left-margin (and (bolp) (> (current-left-margin) 0)))
(loc (point)))
(newline arg)
(goto-char loc)
(while (> arg 0)
(cond ((bolp)
(if do-left-margin (indent-to (current-left-margin)))
(if do-fill-prefix (insert-and-inherit fill-prefix))))
(forward-line 1)
(setq arg (1- arg)))
(goto-char loc)
(end-of-line)))
(defun split-line ()
"Split current line, moving portion beyond point vertically down."
(interactive "*")
(skip-chars-forward " \t")
(let ((col (current-column))
(pos (point)))
(newline 1)
(indent-to col 0)
(goto-char pos)))
(defun quoted-insert (arg)
"Read next input character and insert it.
This is useful for inserting control characters.
If the first character you type after this command is an octal digit,
you should type a sequence of octal digits which specify a character code.
Any nondigit terminates the sequence. If the terminator is a RET,
it is discarded; any other terminator is used itself as input.
The variable `read-quoted-char-radix' specifies the radix for this feature;
set it to 10 or 16 to use decimal or hex instead of octal.
In overwrite mode, this function inserts the character anyway, and
does not handle octal digits specially. This means that if you use
overwrite as your normal editing mode, you can use this function to
insert characters when necessary.
In binary overwrite mode, this function does overwrite, and octal
digits are interpreted as a character code. This is intended to be
useful for editing binary files."
(interactive "*p")
(let ((char (if (or (not overwrite-mode)
(eq overwrite-mode 'overwrite-mode-binary))
(read-quoted-char)
(read-char))))
(if (and enable-multibyte-characters
(>= char ?\240)
(<= char ?\377))
(setq char (unibyte-char-to-multibyte char)))
(if (> arg 0)
(if (eq overwrite-mode 'overwrite-mode-binary)
(delete-char arg)))
(while (> arg 0)
(insert-and-inherit char)
(setq arg (1- arg)))))
(defun delete-indentation (&optional arg)
"Join this line to previous and fix up whitespace at join.
If there is a fill prefix, delete it from the beginning of this line.
With argument, join this line to following line."
(interactive "*P")
(beginning-of-line)
(if arg (forward-line 1))
(if (eq (preceding-char) ?\n)
(progn
(delete-region (point) (1- (point)))
(if (and fill-prefix
(<= (+ (point) (length fill-prefix)) (point-max))
(string= fill-prefix
(buffer-substring (point)
(+ (point) (length fill-prefix)))))
(delete-region (point) (+ (point) (length fill-prefix))))
(fixup-whitespace))))
(defalias 'join-line #'delete-indentation)
(defun fixup-whitespace ()
"Fixup white space between objects around point.
Leave one space or none, according to the context."
(interactive "*")
(save-excursion
(delete-horizontal-space)
(if (or (looking-at "^\\|\\s)")
(save-excursion (forward-char -1)
(looking-at "$\\|\\s(\\|\\s'")))
nil
(insert ?\ ))))
(defun delete-horizontal-space ()
"Delete all spaces and tabs around point."
(interactive "*")
(skip-chars-backward " \t")
(delete-region (point) (progn (skip-chars-forward " \t") (point))))
(defun just-one-space ()
"Delete all spaces and tabs around point, leaving one space."
(interactive "*")
(skip-chars-backward " \t")
(if (= (following-char) ? )
(forward-char 1)
(insert ? ))
(delete-region (point) (progn (skip-chars-forward " \t") (point))))
(defun delete-blank-lines ()
"On blank line, delete all surrounding blank lines, leaving just one.
On isolated blank line, delete that one.
On nonblank line, delete any immediately following blank lines."
(interactive "*")
(let (thisblank singleblank)
(save-excursion
(beginning-of-line)
(setq thisblank (looking-at "[ \t]*$"))
(setq singleblank
(and thisblank
(not (looking-at "[ \t]*\n[ \t]*$"))
(or (bobp)
(progn (forward-line -1)
(not (looking-at "[ \t]*$")))))))
(if thisblank
(progn
(beginning-of-line)
(if singleblank (forward-line 1))
(delete-region (point)
(if (re-search-backward "[^ \t\n]" nil t)
(progn (forward-line 1) (point))
(point-min)))))
(if (not (and thisblank singleblank))
(save-excursion
(end-of-line)
(forward-line 1)
(delete-region (point)
(if (re-search-forward "[^ \t\n]" nil t)
(progn (beginning-of-line) (point))
(point-max)))))
(if (looking-at "^[ \t]*\n\\'")
(delete-region (point) (point-max)))))
(defun back-to-indentation ()
"Move point to the first non-whitespace character on this line."
(interactive)
(beginning-of-line 1)
(skip-chars-forward " \t"))
(defun newline-and-indent ()
"Insert a newline, then indent according to major mode.
Indentation is done using the value of `indent-line-function'.
In programming language modes, this is the same as TAB.
In some text modes, where TAB inserts a tab, this command indents to the
column specified by the function `current-left-margin'."
(interactive "*")
(delete-region (point) (progn (skip-chars-backward " \t") (point)))
(newline)
(indent-according-to-mode))
(defun reindent-then-newline-and-indent ()
"Reindent current line, insert newline, then indent the new line.
Indentation of both lines is done according to the current major mode,
which means calling the current value of `indent-line-function'.
In programming language modes, this is the same as TAB.
In some text modes, where TAB inserts a tab, this indents to the
column specified by the function `current-left-margin'."
(interactive "*")
(save-excursion
(delete-region (point) (progn (skip-chars-backward " \t") (point)))
(indent-according-to-mode))
(newline)
(indent-according-to-mode))
(defun kill-forward-chars (arg)
(if (listp arg) (setq arg (car arg)))
(if (eq arg '-) (setq arg -1))
(kill-region (point) (forward-point arg)))
(defun kill-backward-chars (arg)
(if (listp arg) (setq arg (car arg)))
(if (eq arg '-) (setq arg -1))
(kill-region (point) (forward-point (- arg))))
(defcustom backward-delete-char-untabify-method 'untabify
"*The method for untabifying when deleting backward.
Can be `untabify' -- turn a tab to many spaces, then delete one space.
`hungry' -- delete all whitespace, both tabs and spaces.
nil -- just delete one character."
:type '(choice (const untabify) (const hungry) (const nil))
:group 'killing)
(defun backward-delete-char-untabify (arg &optional killp)
"Delete characters backward, changing tabs into spaces.
The exact behavior depends on `backward-delete-char-untabify-method'.
Delete ARG chars, and kill (save in kill ring) if KILLP is non-nil.
Interactively, ARG is the prefix arg (default 1)
and KILLP is t if a prefix arg was specified."
(interactive "*p\nP")
(when (eq backward-delete-char-untabify-method 'untabify)
(let ((count arg))
(save-excursion
(while (and (> count 0) (not (bobp)))
(if (= (preceding-char) ?\t)
(let ((col (current-column)))
(forward-char -1)
(setq col (- col (current-column)))
(insert-char ?\ col)
(delete-char 1)))
(forward-char -1)
(setq count (1- count))))))
(delete-backward-char
(if (eq backward-delete-char-untabify-method 'hungry)
(let ((wh (- (point) (save-excursion (skip-chars-backward " \t")
(point)))))
(+ arg (if (zerop wh) 0 (1- wh))))
arg)
killp))
(defun zap-to-char (arg char)
"Kill up to and including ARG'th occurrence of CHAR.
Case is ignored if `case-fold-search' is non-nil in the current buffer.
Goes backward if ARG is negative; error if CHAR not found."
(interactive "p\ncZap to char: ")
(kill-region (point) (progn
(search-forward (char-to-string char) nil nil arg)
(point))))
(defun beginning-of-buffer (&optional arg)
"Move point to the beginning of the buffer; leave mark at previous position.
With arg N, put point N/10 of the way from the beginning.
If the buffer is narrowed, this command uses the beginning and size
of the accessible part of the buffer.
Don't use this command in Lisp programs!
\(goto-char (point-min)) is faster and avoids clobbering the mark."
(interactive "P")
(push-mark)
(let ((size (- (point-max) (point-min))))
(goto-char (if arg
(+ (point-min)
(if (> size 10000)
(* (prefix-numeric-value arg)
(/ size 10))
(/ (+ 10 (* size (prefix-numeric-value arg))) 10)))
(point-min))))
(if arg (forward-line 1)))
(defun end-of-buffer (&optional arg)
"Move point to the end of the buffer; leave mark at previous position.
With arg N, put point N/10 of the way from the end.
If the buffer is narrowed, this command uses the beginning and size
of the accessible part of the buffer.
Don't use this command in Lisp programs!
\(goto-char (point-max)) is faster and avoids clobbering the mark."
(interactive "P")
(push-mark)
(let ((size (- (point-max) (point-min))))
(goto-char (if arg
(- (point-max)
(if (> size 10000)
(* (prefix-numeric-value arg)
(/ size 10))
(/ (* size (prefix-numeric-value arg)) 10)))
(point-max))))
(if arg (forward-line 1)
(if (let ((old-point (point)))
(save-excursion
(goto-char (window-start))
(vertical-motion (window-height))
(< (point) old-point)))
(progn
(overlay-recenter (point))
(recenter -3)))))
(defun mark-whole-buffer ()
"Put point at beginning and mark at end of buffer.
You probably should not use this function in Lisp programs;
it is usually a mistake for a Lisp function to use any subroutine
that uses or sets the mark."
(interactive)
(push-mark (point))
(push-mark (point-max) nil t)
(goto-char (point-min)))
(defun count-lines-region (start end)
"Print number of lines and characters in the region."
(interactive "r")
(message "Region has %d lines, %d characters"
(count-lines start end) (- end start)))
(defun what-line ()
"Print the current buffer line number and narrowed line number of point."
(interactive)
(let ((opoint (point)) start)
(save-excursion
(save-restriction
(goto-char (point-min))
(widen)
(beginning-of-line)
(setq start (point))
(goto-char opoint)
(beginning-of-line)
(if (/= start 1)
(message "line %d (narrowed line %d)"
(1+ (count-lines 1 (point)))
(1+ (count-lines start (point))))
(message "Line %d" (1+ (count-lines 1 (point)))))))))
(defun count-lines (start end)
"Return number of lines between START and END.
This is usually the number of newlines between them,
but can be one more if START is not equal to END
and the greater of them is not at the start of a line."
(save-excursion
(save-restriction
(narrow-to-region start end)
(goto-char (point-min))
(if (eq selective-display t)
(save-match-data
(let ((done 0))
(while (re-search-forward "[\n\C-m]" nil t 40)
(setq done (+ 40 done)))
(while (re-search-forward "[\n\C-m]" nil t 1)
(setq done (+ 1 done)))
(goto-char (point-max))
(if (and (/= start end)
(not (bolp)))
(1+ done)
done)))
(- (buffer-size) (forward-line (buffer-size)))))))
(defun what-cursor-position (&optional detail)
"Print info on cursor position (on screen and within buffer).
Also describe the character after point, and give its character code
in octal, decimal and hex.
For a non-ASCII multibyte character, also give its encoding in the
buffer's selected coding system if the coding system encodes the
character safely. If the character is encoded into one byte, that
code is shown in hex. If the character is encoded into more than one
byte, just \"...\" is shown.
With prefix argument, print additional details about that character,
instead of the cursor position. This includes the character set name,
the codes that identify the character within that character set. In
addition, the encoding is fully shown."
(interactive "P")
(let* ((char (following-char))
(beg (point-min))
(end (point-max))
(pos (point))
(total (buffer-size))
(percent (if (> total 50000)
(/ (+ (/ total 200) (1- pos)) (max (/ total 100) 1))
(/ (+ (/ total 2) (* 100 (1- pos))) (max total 1))))
(hscroll (if (= (window-hscroll) 0)
""
(format " Hscroll=%d" (window-hscroll))))
(col (current-column)))
(if (= pos end)
(if (or (/= beg 1) (/= end (1+ total)))
(message "point=%d of %d(%d%%) <%d - %d> column %d %s"
pos total percent beg end col hscroll)
(message "point=%d of %d(%d%%) column %d %s"
pos total percent col hscroll))
(let ((coding buffer-file-coding-system)
encoded encoding-msg)
(if (or (not coding)
(eq (coding-system-type coding) t))
(setq coding default-buffer-file-coding-system))
(if (not (char-valid-p char))
(setq encoding-msg
(format "(0%o, %d, 0x%x, invalid)" char char char))
(setq encoded (and (>= char 128) (encode-coding-char char coding)))
(setq encoding-msg
(if encoded
(format "(0%o, %d, 0x%x, ext %s)"
char char char
(if (and (not detail)
(> (length encoded) 1))
"..."
(concat
(encoded-string-description encoded coding)
(if (cmpcharp char) "..." ""))))
(format "(0%o, %d, 0x%x)" char char char))))
(if detail
(let ((internal
(if (cmpcharp char)
(concat "(composed \""
(decompose-composite-char char)
"\")")
(split-char char))))
(message "Char: %s %s %s"
(if (< char 256)
(single-key-description char)
(buffer-substring (point) (1+ (point))))
encoding-msg internal))
(if (or (/= beg 1) (/= end (1+ total)))
(message "Char: %s %s point=%d of %d(%d%%) <%d - %d> column %d %s"
(if (< char 256)
(single-key-description char)
(buffer-substring (point) (1+ (point))))
encoding-msg pos total percent beg end col hscroll)
(message "Char: %s %s point=%d of %d(%d%%) column %d %s"
(if (< char 256)
(single-key-description char)
(buffer-substring (point) (1+ (point))))
encoding-msg pos total percent col hscroll)))))))
(defun fundamental-mode ()
"Major mode not specialized for anything in particular.
Other major modes are defined by comparison with this one."
(interactive)
(kill-all-local-variables))
(defvar read-expression-map (cons 'keymap minibuffer-local-map)
"Minibuffer keymap used for reading Lisp expressions.")
(define-key read-expression-map "\M-\t" 'lisp-complete-symbol)
(defvar read-expression-history nil)
(defun eval-expression (eval-expression-arg
&optional eval-expression-insert-value)
"Evaluate EXPRESSION and print value in minibuffer.
Value is also consed on to front of the variable `values'."
(interactive
(list (read-from-minibuffer "Eval: "
nil read-expression-map t
'read-expression-history)
current-prefix-arg))
(setq values (cons (eval eval-expression-arg) values))
(prin1 (car values)
(if eval-expression-insert-value (current-buffer) t)))
(defun edit-and-eval-command (prompt command)
"Prompting with PROMPT, let user edit COMMAND and eval result.
COMMAND is a Lisp expression. Let user edit that expression in
the minibuffer, then read and evaluate the result."
(let ((command (read-from-minibuffer prompt
(prin1-to-string command)
read-expression-map t
'(command-history . 1))))
(if (stringp (car command-history))
(setq command-history (cdr command-history)))
(or (equal command (car command-history))
(setq command-history (cons command command-history)))
(eval command)))
(defun repeat-complex-command (arg)
"Edit and re-evaluate last complex command, or ARGth from last.
A complex command is one which used the minibuffer.
The command is placed in the minibuffer as a Lisp form for editing.
The result is executed, repeating the command as changed.
If the command has been changed or is not the most recent previous command
it is added to the front of the command history.
You can use the minibuffer history commands \\<minibuffer-local-map>\\[next-history-element] and \\[previous-history-element]
to get different commands to edit and resubmit."
(interactive "p")
(let ((elt (nth (1- arg) command-history))
newcmd)
(if elt
(progn
(setq newcmd
(let ((print-level nil)
(minibuffer-history-position arg)
(minibuffer-history-sexp-flag (1+ (minibuffer-depth))))
(read-from-minibuffer
"Redo: " (prin1-to-string elt) read-expression-map t
(cons 'command-history arg))))
(if (stringp (car command-history))
(setq command-history (cdr command-history)))
(or (equal newcmd (car command-history))
(setq command-history (cons newcmd command-history)))
(eval newcmd))
(ding))))
(defvar minibuffer-history nil
"Default minibuffer history list.
This is used for all minibuffer input
except when an alternate history list is specified.")
(defvar minibuffer-history-sexp-flag nil
"Non-nil when doing history operations on `command-history'.
More generally, indicates that the history list being acted on
contains expressions rather than strings.
It is only valid if its value equals the current minibuffer depth,
to handle recursive uses of the minibuffer.")
(setq minibuffer-history-variable 'minibuffer-history)
(setq minibuffer-history-position nil)
(defvar minibuffer-history-search-history nil)
(mapcar
(lambda (key-and-command)
(mapcar
(lambda (keymap-and-completionp)
(define-key (symbol-value (car keymap-and-completionp))
(car key-and-command)
(let ((command (cdr key-and-command)))
(if (consp command)
(if (and (cdr keymap-and-completionp) nil) (progn (error "EMACS BUG!") (cdr command))
(car command))
command))))
'((minibuffer-local-map . nil)
(minibuffer-local-ns-map . nil)
(minibuffer-local-completion-map . t)
(minibuffer-local-must-match-map . t)
(read-expression-map . nil))))
'(("\en" . (next-history-element . next-complete-history-element))
([next] . (next-history-element . next-complete-history-element))
("\ep" . (previous-history-element . previous-complete-history-element))
([prior] . (previous-history-element . previous-complete-history-element))
("\er" . previous-matching-history-element)
("\es" . next-matching-history-element)))
(defvar minibuffer-text-before-history nil
"Text that was in this minibuffer before any history commands.
This is nil if there have not yet been any history commands
in this use of the minibuffer.")
(add-hook 'minibuffer-setup-hook 'minibuffer-history-initialize)
(defun minibuffer-history-initialize ()
(setq minibuffer-text-before-history nil))
(defcustom minibuffer-history-case-insensitive-variables nil
"*Minibuffer history variables for which matching should ignore case.
If a history variable is a member of this list, then the
\\[previous-matching-history-element] and \\[next-matching-history-element]\
commands ignore case when searching it, regardless of `case-fold-search'."
:type '(repeat variable)
:group 'minibuffer)
(defun previous-matching-history-element (regexp n)
"Find the previous history element that matches REGEXP.
\(Previous history elements refer to earlier actions.)
With prefix argument N, search for Nth previous match.
If N is negative, find the next or Nth next match.
An uppercase letter in REGEXP makes the search case-sensitive.
See also `minibuffer-history-case-insensitive-variables'."
(interactive
(let* ((enable-recursive-minibuffers t)
(regexp (read-from-minibuffer "Previous element matching (regexp): "
nil
minibuffer-local-map
nil
'minibuffer-history-search-history)))
(list (if (string= regexp "")
(if minibuffer-history-search-history
(car minibuffer-history-search-history)
(error "No previous history search regexp"))
regexp)
(prefix-numeric-value current-prefix-arg))))
(if (and (zerop minibuffer-history-position)
(null minibuffer-text-before-history))
(setq minibuffer-text-before-history (buffer-string)))
(let ((history (symbol-value minibuffer-history-variable))
(case-fold-search
(if (isearch-no-upper-case-p regexp t) (if (memq minibuffer-history-variable
minibuffer-history-case-insensitive-variables)
t
case-fold-search)
nil))
prevpos
(pos minibuffer-history-position))
(while (/= n 0)
(setq prevpos pos)
(setq pos (min (max 1 (+ pos (if (< n 0) -1 1))) (length history)))
(if (= pos prevpos)
(error (if (= pos 1)
"No later matching history item"
"No earlier matching history item")))
(if (string-match regexp
(if (eq minibuffer-history-sexp-flag
(minibuffer-depth))
(let ((print-level nil))
(prin1-to-string (nth (1- pos) history)))
(nth (1- pos) history)))
(setq n (+ n (if (< n 0) 1 -1)))))
(setq minibuffer-history-position pos)
(erase-buffer)
(let ((elt (nth (1- pos) history)))
(insert (if (eq minibuffer-history-sexp-flag (minibuffer-depth))
(let ((print-level nil))
(prin1-to-string elt))
elt)))
(goto-char (point-min)))
(if (or (eq (car (car command-history)) 'previous-matching-history-element)
(eq (car (car command-history)) 'next-matching-history-element))
(setq command-history (cdr command-history))))
(defun next-matching-history-element (regexp n)
"Find the next history element that matches REGEXP.
\(The next history element refers to a more recent action.)
With prefix argument N, search for Nth next match.
If N is negative, find the previous or Nth previous match.
An uppercase letter in REGEXP makes the search case-sensitive."
(interactive
(let* ((enable-recursive-minibuffers t)
(regexp (read-from-minibuffer "Next element matching (regexp): "
nil
minibuffer-local-map
nil
'minibuffer-history-search-history)))
(list (if (string= regexp "")
(setcar minibuffer-history-search-history
(nth 1 minibuffer-history-search-history))
regexp)
(prefix-numeric-value current-prefix-arg))))
(previous-matching-history-element regexp (- n)))
(defun next-history-element (n)
"Insert the next element of the minibuffer history into the minibuffer."
(interactive "p")
(or (zerop n)
(let ((narg (- minibuffer-history-position n))
(minimum (if minibuffer-default -1 0))
elt minibuffer-returned-to-present)
(if (and (zerop minibuffer-history-position)
(null minibuffer-text-before-history))
(setq minibuffer-text-before-history (buffer-string)))
(if (< narg minimum)
(if minibuffer-default
(error "End of history; no next item")
(error "End of history; no default available")))
(if (> narg (length (symbol-value minibuffer-history-variable)))
(error "Beginning of history; no preceding item"))
(erase-buffer)
(setq minibuffer-history-position narg)
(cond ((= narg -1)
(setq elt minibuffer-default))
((= narg 0)
(setq elt (or minibuffer-text-before-history ""))
(setq minibuffer-returned-to-present t)
(setq minibuffer-text-before-history nil))
(t (setq elt (nth (1- minibuffer-history-position)
(symbol-value minibuffer-history-variable)))))
(insert
(if (and (eq minibuffer-history-sexp-flag (minibuffer-depth))
(not minibuffer-returned-to-present))
(let ((print-level nil))
(prin1-to-string elt))
elt))
(goto-char (point-min)))))
(defun previous-history-element (n)
"Inserts the previous element of the minibuffer history into the minibuffer."
(interactive "p")
(next-history-element (- n)))
(defun next-complete-history-element (n)
"Get next element of history which is a completion of minibuffer contents."
(interactive "p")
(let ((point-at-start (point)))
(next-matching-history-element
(concat "^" (regexp-quote (buffer-substring (point-min) (point)))) n)
(goto-char point-at-start)))
(defun previous-complete-history-element (n)
"\
Get previous element of history which is a completion of minibuffer contents."
(interactive "p")
(next-complete-history-element (- n)))
(defun goto-line (arg)
"Goto line ARG, counting from line 1 at beginning of buffer."
(interactive "NGoto line: ")
(setq arg (prefix-numeric-value arg))
(save-restriction
(widen)
(goto-char 1)
(if (eq selective-display t)
(re-search-forward "[\n\C-m]" nil 'end (1- arg))
(forward-line (1- arg)))))
(defalias 'advertised-undo 'undo)
(defun undo (&optional arg)
"Undo some previous changes.
Repeat this command to undo more changes.
A numeric argument serves as a repeat count.
Just C-u as argument requests selective undo,
limited to changes within the current region.
Likewise in Transient Mark mode when the mark is active."
(interactive "*P")
(setq this-command t)
(let ((modified (buffer-modified-p))
(recent-save (recent-auto-save-p)))
(or (eq (selected-window) (minibuffer-window))
(message "Undo!"))
(or (eq last-command 'undo)
(progn (if (or arg (and transient-mark-mode mark-active))
(undo-start (region-beginning) (region-end))
(undo-start))
(undo-more 1)))
(undo-more (if arg (prefix-numeric-value arg) 1))
(let ((tail buffer-undo-list)
done)
(while (and tail (not done) (not (null (car tail))))
(if (integerp (car tail))
(progn
(setq done t)
(setq buffer-undo-list (delq (car tail) buffer-undo-list))))
(setq tail (cdr tail))))
(and modified (not (buffer-modified-p))
(delete-auto-save-file-if-necessary recent-save)))
(setq this-command 'undo))
(defvar pending-undo-list nil
"Within a run of consecutive undo commands, list remaining to be undone.")
(defvar undo-in-progress nil
"Non-nil while performing an undo.
Some change-hooks test this variable to do something different.")
(defun undo-more (count)
"Undo back N undo-boundaries beyond what was already undone recently.
Call `undo-start' to get ready to undo recent changes,
then call `undo-more' one or more times to undo them."
(or pending-undo-list
(error "No further undo information"))
(let ((undo-in-progress t))
(setq pending-undo-list (primitive-undo count pending-undo-list))))
(defun undo-copy-list (list)
"Make a copy of undo list LIST."
(mapcar 'undo-copy-list-1 list))
(defun undo-copy-list-1 (elt)
(if (consp elt)
(cons (car elt) (undo-copy-list-1 (cdr elt)))
elt))
(defun undo-start (&optional beg end)
"Set `pending-undo-list' to the front of the undo list.
The next call to `undo-more' will undo the most recently made change.
If BEG and END are specified, then only undo elements
that apply to text between BEG and END are used; other undo elements
are ignored. If BEG and END are nil, all undo elements are used."
(if (eq buffer-undo-list t)
(error "No undo information in this buffer"))
(setq pending-undo-list
(if (and beg end (not (= beg end)))
(undo-make-selective-list (min beg end) (max beg end))
buffer-undo-list)))
(defvar undo-adjusted-markers)
(defun undo-make-selective-list (start end)
"Return a list of undo elements for the region START to END.
The elements come from `buffer-undo-list', but we keep only
the elements inside this region, and discard those outside this region.
If we find an element that crosses an edge of this region,
we stop and ignore all further elements."
(let ((undo-list-copy (undo-copy-list buffer-undo-list))
(undo-list (list nil))
undo-adjusted-markers
some-rejected
undo-elt undo-elt temp-undo-list delta)
(while undo-list-copy
(setq undo-elt (car undo-list-copy))
(let ((keep-this
(cond ((and (consp undo-elt) (eq (car undo-elt) t))
(not some-rejected))
(t
(undo-elt-in-region undo-elt start end)))))
(if keep-this
(progn
(setq end (+ end (cdr (undo-delta undo-elt))))
(if (not (and (eq (car undo-list) nil)
(eq undo-elt nil)))
(setq undo-list (cons undo-elt undo-list))))
(if (undo-elt-crosses-region undo-elt start end)
(setq undo-list-copy nil)
(setq some-rejected t)
(setq temp-undo-list (cdr undo-list-copy))
(setq delta (undo-delta undo-elt))
(when (/= (cdr delta) 0)
(let ((position (car delta))
(offset (cdr delta)))
(while temp-undo-list
(setq undo-elt (car temp-undo-list))
(cond ((integerp undo-elt)
(if (>= undo-elt position)
(setcar temp-undo-list (- undo-elt offset))))
((atom undo-elt) nil)
((stringp (car undo-elt))
(let ((text-pos (abs (cdr undo-elt)))
(point-at-end (< (cdr undo-elt) 0 )))
(if (>= text-pos position)
(setcdr undo-elt (* (if point-at-end -1 1)
(- text-pos offset))))))
((integerp (car undo-elt))
(when (>= (car undo-elt) position)
(setcar undo-elt (- (car undo-elt) offset))
(setcdr undo-elt (- (cdr undo-elt) offset))))
((null (car undo-elt))
(let ((tail (nthcdr 3 undo-elt)))
(when (>= (car tail) position)
(setcar tail (- (car tail) offset))
(setcdr tail (- (cdr tail) offset))))))
(setq temp-undo-list (cdr temp-undo-list))))))))
(setq undo-list-copy (cdr undo-list-copy)))
(nreverse undo-list)))
(defun undo-elt-in-region (undo-elt start end)
"Determine whether UNDO-ELT falls inside the region START ... END.
If it crosses the edge, we return nil."
(cond ((integerp undo-elt)
(and (>= undo-elt start)
(< undo-elt end)))
((eq undo-elt nil)
t)
((atom undo-elt)
nil)
((stringp (car undo-elt))
(and (>= (abs (cdr undo-elt)) start)
(< (abs (cdr undo-elt)) end)))
((and (consp undo-elt) (markerp (car undo-elt)))
(let ((alist-elt (assq (car undo-elt) undo-adjusted-markers)))
(unless alist-elt
(setq alist-elt (cons (car undo-elt)
(marker-position (car undo-elt))))
(setq undo-adjusted-markers
(cons alist-elt undo-adjusted-markers)))
(and (cdr alist-elt)
(>= (cdr alist-elt) start)
(< (cdr alist-elt) end))))
((null (car undo-elt))
(let ((tail (nthcdr 3 undo-elt)))
(and (>= (car tail) start)
(< (cdr tail) end))))
((integerp (car undo-elt))
(and (>= (car undo-elt) start)
(< (cdr undo-elt) end)))))
(defun undo-elt-crosses-region (undo-elt start end)
"Test whether UNDO-ELT crosses one edge of that region START ... END.
This assumes we have already decided that UNDO-ELT
is not *inside* the region START...END."
(cond ((atom undo-elt) nil)
((null (car undo-elt))
(let ((tail (nthcdr 3 undo-elt)))
(not (or (< (car tail) end)
(> (cdr tail) start)))))
((integerp (car undo-elt))
(not (or (< (car undo-elt) end)
(> (cdr undo-elt) start))))))
(defun undo-delta (undo-elt)
(if (consp undo-elt)
(cond ((stringp (car undo-elt))
(cons (abs (cdr undo-elt)) (length (car undo-elt))))
((integerp (car undo-elt))
(cons (car undo-elt) (- (car undo-elt) (cdr undo-elt))))
(t
'(0 . 0)))
'(0 . 0)))
(defvar shell-command-history nil
"History list for some commands that read shell commands.")
(defvar shell-command-switch "-c"
"Switch used to have the shell execute its command line argument.")
(defvar shell-command-default-error-buffer nil
"*Buffer name for `shell-command' and `shell-command-on-region' error output.
This buffer is used when `shell-command' or 'shell-command-on-region'
is run interactively. A value of nil means that output to stderr and
stdout will be intermixed in the output stream.")
(defun shell-command (command &optional output-buffer error-buffer)
"Execute string COMMAND in inferior shell; display output, if any.
If COMMAND ends in ampersand, execute it asynchronously.
The output appears in the buffer `*Async Shell Command*'.
That buffer is in shell mode.
Otherwise, COMMAND is executed synchronously. The output appears in the
buffer `*Shell Command Output*'.
If the output is one line, it is displayed in the echo area *as well*,
but it is nonetheless available in buffer `*Shell Command Output*',
even though that buffer is not automatically displayed.
If there is no output, or if output is inserted in the current buffer,
then `*Shell Command Output*' is deleted.
To specify a coding system for converting non-ASCII characters
in the shell command output, use \\[universal-coding-system-argument]
before this command.
Noninteractive callers can specify coding systems by binding
`coding-system-for-read' and `coding-system-for-write'.
The optional second argument OUTPUT-BUFFER, if non-nil,
says to put the output in some other buffer.
If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
If OUTPUT-BUFFER is not a buffer and not nil,
insert output in current buffer. (This cannot be done asynchronously.)
In either case, the output is inserted after point (leaving mark after it).
If the optional third argument ERROR-BUFFER is non-nil, it is a buffer
or buffer name to which to direct the command's standard error output.
If it is nil, error output is mingled with regular output.
In an interactive call, the variable `shell-command-default-error-buffer'
specifies the value of ERROR-BUFFER."
(interactive (list (read-from-minibuffer "Shell command: "
nil nil nil 'shell-command-history)
current-prefix-arg
shell-command-default-error-buffer))
(let ((handler
(find-file-name-handler (directory-file-name default-directory)
'shell-command)))
(if handler
(funcall handler 'shell-command command output-buffer error-buffer)
(if (and output-buffer
(not (or (bufferp output-buffer) (stringp output-buffer))))
(let ((error-file
(if error-buffer
(concat (file-name-directory temp-file-name-pattern)
(make-temp-name "scor"))
nil)))
(barf-if-buffer-read-only)
(push-mark nil t)
(call-process shell-file-name nil
(if error-file
(list t error-file)
t)
nil shell-command-switch command)
(when (and error-file (file-exists-p error-file))
(if (< 0 (nth 7 (file-attributes error-file)))
(with-current-buffer (get-buffer-create error-buffer)
(let ((pos-from-end (- (point-max) (point))))
(or (bobp)
(insert "\f\n"))
(format-insert-file error-file nil)
(goto-char (- (point-max) pos-from-end)))
(display-buffer (current-buffer))))
(delete-file error-file))
(goto-char (prog1 (mark t)
(set-marker (mark-marker) (point)
(current-buffer)))))
(save-match-data
(if (string-match "[ \t]*&[ \t]*$" command)
(let ((buffer (get-buffer-create
(or output-buffer "*Async Shell Command*")))
(directory default-directory)
proc)
(setq command (substring command 0 (match-beginning 0)))
(setq proc (get-buffer-process buffer))
(if proc
(if (yes-or-no-p "A command is running. Kill it? ")
(kill-process proc)
(error "Shell command in progress")))
(save-excursion
(set-buffer buffer)
(setq buffer-read-only nil)
(erase-buffer)
(display-buffer buffer)
(setq default-directory directory)
(setq proc (start-process "Shell" buffer shell-file-name
shell-command-switch command))
(setq mode-line-process '(":%s"))
(require 'shell) (shell-mode)
(set-process-sentinel proc 'shell-command-sentinel)
))
(shell-command-on-region (point) (point) command
output-buffer nil error-buffer)))))))
(defun shell-command-sentinel (process signal)
(if (memq (process-status process) '(exit signal))
(message "%s: %s."
(car (cdr (cdr (process-command process))))
(substring signal 0 -1))))
(defun shell-command-on-region (start end command
&optional output-buffer replace
error-buffer)
"Execute string COMMAND in inferior shell with region as input.
Normally display output (if any) in temp buffer `*Shell Command Output*';
Prefix arg means replace the region with it. Return the exit code of
COMMAND.
To specify a coding system for converting non-ASCII characters
in the input and output to the shell command, use \\[universal-coding-system-argument]
before this command. By default, the input (from the current buffer)
is encoded in the same coding system that will be used to save the file,
`buffer-file-coding-system'. If the output is going to replace the region,
then it is decoded from that same coding system.
The noninteractive arguments are START, END, COMMAND, OUTPUT-BUFFER,
REPLACE, ERROR-BUFFER. Noninteractive callers can specify coding
systems by binding `coding-system-for-read' and
`coding-system-for-write'.
If the output is one line, it is displayed in the echo area,
but it is nonetheless available in buffer `*Shell Command Output*'
even though that buffer is not automatically displayed.
If there is no output, or if output is inserted in the current buffer,
then `*Shell Command Output*' is deleted.
If the optional fourth argument OUTPUT-BUFFER is non-nil,
that says to put the output in some other buffer.
If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
If OUTPUT-BUFFER is not a buffer and not nil,
insert output in the current buffer.
In either case, the output is inserted after point (leaving mark after it).
If REPLACE, the optional fifth argument, is non-nil, that means insert
the output in place of text from START to END, putting point and mark
around it.
If optional sixth argument ERROR-BUFFER is non-nil, it is a buffer
or buffer name to which to direct the command's standard error output.
If it is nil, error output is mingled with regular output.
In an interactive call, the variable `shell-command-default-error-buffer'
specifies the value of ERROR-BUFFER."
(interactive (let ((string
(read-from-minibuffer "Shell command on region: "
nil nil nil
'shell-command-history)))
(list (region-beginning) (region-end)
string
current-prefix-arg
current-prefix-arg
shell-command-default-error-buffer)))
(let ((error-file
(if error-buffer
(concat (file-name-directory temp-file-name-pattern)
(make-temp-name "scor"))
nil))
exit-status)
(if (or replace
(and output-buffer
(not (or (bufferp output-buffer) (stringp output-buffer)))))
(let ((swap (and replace (< start end))))
(goto-char start)
(and replace (push-mark))
(setq exit-status
(call-process-region start end shell-file-name t
(if error-file
(list t error-file)
t)
nil shell-command-switch command))
(let ((shell-buffer (get-buffer "*Shell Command Output*")))
(and shell-buffer (not (eq shell-buffer (current-buffer)))
(kill-buffer shell-buffer)))
(and replace swap (exchange-point-and-mark)))
(let ((buffer (get-buffer-create
(or output-buffer "*Shell Command Output*")))
(success nil))
(unwind-protect
(if (eq buffer (current-buffer))
(progn (setq buffer-read-only nil)
(delete-region (max start end) (point-max))
(delete-region (point-min) (min start end))
(setq exit-status
(call-process-region (point-min) (point-max)
shell-file-name t
(if error-file
(list t error-file)
t)
nil shell-command-switch
command)))
(save-excursion
(set-buffer buffer)
(setq buffer-read-only nil)
(erase-buffer))
(setq exit-status
(call-process-region start end shell-file-name nil
(if error-file
(list buffer error-file)
buffer)
nil shell-command-switch command)))
(setq success (and exit-status (equal 0 exit-status)))
(let ((lines (save-excursion
(set-buffer buffer)
(if (= (buffer-size) 0)
0
(count-lines (point-min) (point-max))))))
(cond ((= lines 0)
(if (and error-file
(< 0 (nth 7 (file-attributes error-file))))
(message "(Shell command %sed with some error output)"
(if (equal 0 exit-status)
"succeed"
"fail"))
(message "(Shell command %sed with no output)"
(if (equal 0 exit-status)
"succeed"
"fail")))
(kill-buffer buffer))
((= lines 1)
(message "%s"
(save-excursion
(set-buffer buffer)
(goto-char (point-min))
(buffer-substring (point)
(progn (end-of-line) (point))))))
(t
(save-excursion
(set-buffer buffer)
(goto-char (point-min)))
(display-buffer buffer)))))))
(when (and error-file (file-exists-p error-file))
(if (< 0 (nth 7 (file-attributes error-file)))
(with-current-buffer (get-buffer-create error-buffer)
(let ((pos-from-end (- (point-max) (point))))
(or (bobp)
(insert "\f\n"))
(format-insert-file error-file nil)
(goto-char (- (point-max) pos-from-end)))
(display-buffer (current-buffer))))
(delete-file error-file))
exit-status))
(defun shell-command-to-string (command)
"Execute shell command COMMAND and return its output as a string."
(with-output-to-string
(with-current-buffer
standard-output
(call-process shell-file-name nil t nil shell-command-switch command))))
(defvar universal-argument-map
(let ((map (make-sparse-keymap)))
(define-key map [t] 'universal-argument-other-key)
(define-key map (vector meta-prefix-char t) 'universal-argument-other-key)
(define-key map [switch-frame] nil)
(define-key map [?\C-u] 'universal-argument-more)
(define-key map [?-] 'universal-argument-minus)
(define-key map [?0] 'digit-argument)
(define-key map [?1] 'digit-argument)
(define-key map [?2] 'digit-argument)
(define-key map [?3] 'digit-argument)
(define-key map [?4] 'digit-argument)
(define-key map [?5] 'digit-argument)
(define-key map [?6] 'digit-argument)
(define-key map [?7] 'digit-argument)
(define-key map [?8] 'digit-argument)
(define-key map [?9] 'digit-argument)
map)
"Keymap used while processing \\[universal-argument].")
(defvar universal-argument-num-events nil
"Number of argument-specifying events read by `universal-argument'.
`universal-argument-other-key' uses this to discard those events
from (this-command-keys), and reread only the final command.")
(defun universal-argument ()
"Begin a numeric argument for the following command.
Digits or minus sign following \\[universal-argument] make up the numeric argument.
\\[universal-argument] following the digits or minus sign ends the argument.
\\[universal-argument] without digits or minus sign provides 4 as argument.
Repeating \\[universal-argument] without digits or minus sign
multiplies the argument by 4 each time.
For some commands, just \\[universal-argument] by itself serves as a flag
which is different in effect from any particular numeric argument.
These commands include \\[set-mark-command] and \\[start-kbd-macro]."
(interactive)
(setq prefix-arg (list 4))
(setq universal-argument-num-events (length (this-command-keys)))
(setq overriding-terminal-local-map universal-argument-map))
(defun universal-argument-more (arg)
(interactive "P")
(if (consp arg)
(setq prefix-arg (list (* 4 (car arg))))
(if (eq arg '-)
(setq prefix-arg (list -4))
(setq prefix-arg arg)
(setq overriding-terminal-local-map nil)))
(setq universal-argument-num-events (length (this-command-keys))))
(defun negative-argument (arg)
"Begin a negative numeric argument for the next command.
\\[universal-argument] following digits or minus sign ends the argument."
(interactive "P")
(cond ((integerp arg)
(setq prefix-arg (- arg)))
((eq arg '-)
(setq prefix-arg nil))
(t
(setq prefix-arg '-)))
(setq universal-argument-num-events (length (this-command-keys)))
(setq overriding-terminal-local-map universal-argument-map))
(defun digit-argument (arg)
"Part of the numeric argument for the next command.
\\[universal-argument] following digits or minus sign ends the argument."
(interactive "P")
(let ((digit (- (logand last-command-char ?\177) ?0)))
(cond ((integerp arg)
(setq prefix-arg (+ (* arg 10)
(if (< arg 0) (- digit) digit))))
((eq arg '-)
(setq prefix-arg (if (zerop digit) '- (- digit))))
(t
(setq prefix-arg digit))))
(setq universal-argument-num-events (length (this-command-keys)))
(setq overriding-terminal-local-map universal-argument-map))
(defun universal-argument-minus (arg)
(interactive "P")
(if (integerp arg)
(universal-argument-other-key arg)
(negative-argument arg)))
(defun universal-argument-other-key (arg)
(interactive "P")
(setq prefix-arg arg)
(let* ((key (this-command-keys))
(keylist (listify-key-sequence key)))
(setq unread-command-events
(append (nthcdr universal-argument-num-events keylist)
unread-command-events)))
(reset-this-command-lengths)
(setq overriding-terminal-local-map nil))
(defun forward-to-indentation (arg)
"Move forward ARG lines and position at first nonblank character."
(interactive "p")
(forward-line arg)
(skip-chars-forward " \t"))
(defun backward-to-indentation (arg)
"Move backward ARG lines and position at first nonblank character."
(interactive "p")
(forward-line (- arg))
(skip-chars-forward " \t"))
(defcustom kill-whole-line nil
"*If non-nil, `kill-line' with no arg at beg of line kills the whole line."
:type 'boolean
:group 'killing)
(defun kill-line (&optional arg)
"Kill the rest of the current line; if no nonblanks there, kill thru newline.
With prefix argument, kill that many lines from point.
Negative arguments kill lines backward.
When calling from a program, nil means \"no arg\",
a number counts as a prefix arg.
To kill a whole line, when point is not at the beginning, type \
\\[beginning-of-line] \\[kill-line] \\[kill-line].
If `kill-whole-line' is non-nil, then this command kills the whole line
including its terminating newline, when used at the beginning of a line
with no argument. As a consequence, you can always kill a whole line
by typing \\[beginning-of-line] \\[kill-line]."
(interactive "P")
(kill-region (point)
(progn
(if arg
(forward-visible-line (prefix-numeric-value arg))
(if (eobp)
(signal 'end-of-buffer nil))
(if (or (looking-at "[ \t]*$") (and kill-whole-line (bolp)))
(forward-visible-line 1)
(end-of-visible-line)))
(point))))
(defun forward-visible-line (arg)
"Move forward by ARG lines, ignoring currently invisible newlines only.
If ARG is negative, move backward -ARG lines.
If ARG is zero, move to the beginning of the current line."
(condition-case nil
(if (> arg 0)
(while (> arg 0)
(or (zerop (forward-line 1))
(signal 'end-of-buffer nil))
(while (and (not (eobp))
(let ((prop
(get-char-property (point) 'invisible)))
(if (eq buffer-invisibility-spec t)
prop
(or (memq prop buffer-invisibility-spec)
(assq prop buffer-invisibility-spec)))))
(goto-char
(if (get-text-property (point) 'invisible)
(or (next-single-property-change (point) 'invisible)
(point-max))
(next-overlay-change (point))))
(or (zerop (forward-line 1))
(signal 'end-of-buffer nil)))
(setq arg (1- arg)))
(let ((first t))
(while (or first (< arg 0))
(if (zerop arg)
(beginning-of-line)
(or (zerop (forward-line -1))
(signal 'beginning-of-buffer nil)))
(while (and (not (bobp))
(let ((prop
(get-char-property (1- (point)) 'invisible)))
(if (eq buffer-invisibility-spec t)
prop
(or (memq prop buffer-invisibility-spec)
(assq prop buffer-invisibility-spec)))))
(goto-char
(if (get-text-property (1- (point)) 'invisible)
(or (previous-single-property-change (point) 'invisible)
(point-min))
(previous-overlay-change (point))))
(or (zerop (forward-line -1))
(signal 'beginning-of-buffer nil)))
(setq first nil)
(setq arg (1+ arg)))))
((beginning-of-buffer end-of-buffer)
nil)))
(defun end-of-visible-line ()
"Move to end of current visible line."
(end-of-line)
(while (and (not (eobp))
(let ((prop
(get-char-property (point) 'invisible)))
(if (eq buffer-invisibility-spec t)
prop
(or (memq prop buffer-invisibility-spec)
(assq prop buffer-invisibility-spec)))))
(if (get-text-property (point) 'invisible)
(goto-char (next-single-property-change (point) 'invisible))
(goto-char (next-overlay-change (point))))
(end-of-line)))
(defvar interprogram-cut-function nil
"Function to call to make a killed region available to other programs.
Most window systems provide some sort of facility for cutting and
pasting text between the windows of different programs.
This variable holds a function that Emacs calls whenever text
is put in the kill ring, to make the new kill available to other
programs.
The function takes one or two arguments.
The first argument, TEXT, is a string containing
the text which should be made available.
The second, PUSH, if non-nil means this is a \"new\" kill;
nil means appending to an \"old\" kill.")
(defvar interprogram-paste-function nil
"Function to call to get text cut from other programs.
Most window systems provide some sort of facility for cutting and
pasting text between the windows of different programs.
This variable holds a function that Emacs calls to obtain
text that other programs have provided for pasting.
The function should be called with no arguments. If the function
returns nil, then no other program has provided such text, and the top
of the Emacs kill ring should be used. If the function returns a
string, that string should be put in the kill ring as the latest kill.
Note that the function should return a string only if a program other
than Emacs has provided a string for pasting; if Emacs provided the
most recent string, the function should return nil. If it is
difficult to tell whether Emacs or some other program provided the
current string, it is probably good enough to return nil if the string
is equal (according to `string=') to the last text Emacs provided.")
(defvar kill-ring nil
"List of killed text sequences.
Since the kill ring is supposed to interact nicely with cut-and-paste
facilities offered by window systems, use of this variable should
interact nicely with `interprogram-cut-function' and
`interprogram-paste-function'. The functions `kill-new',
`kill-append', and `current-kill' are supposed to implement this
interaction; you may want to use them instead of manipulating the kill
ring directly.")
(defcustom kill-ring-max 60
"*Maximum length of kill ring before oldest elements are thrown away."
:type 'integer
:group 'killing)
(defvar kill-ring-yank-pointer nil
"The tail of the kill ring whose car is the last thing yanked.")
(defun kill-new (string &optional replace)
"Make STRING the latest kill in the kill ring.
Set the kill-ring-yank pointer to point to it.
If `interprogram-cut-function' is non-nil, apply it to STRING.
Optional second argument REPLACE non-nil means that STRING will replace
the front of the kill ring, rather than being added to the list."
(and (fboundp 'menu-bar-update-yank-menu)
(menu-bar-update-yank-menu string (and replace (car kill-ring))))
(if replace
(setcar kill-ring string)
(setq kill-ring (cons string kill-ring))
(if (> (length kill-ring) kill-ring-max)
(setcdr (nthcdr (1- kill-ring-max) kill-ring) nil)))
(setq kill-ring-yank-pointer kill-ring)
(if interprogram-cut-function
(funcall interprogram-cut-function string (not replace))))
(defun kill-append (string before-p)
"Append STRING to the end of the latest kill in the kill ring.
If BEFORE-P is non-nil, prepend STRING to the kill.
If `interprogram-cut-function' is set, pass the resulting kill to
it."
(kill-new (if before-p
(concat string (car kill-ring))
(concat (car kill-ring) string)) t))
(defun current-kill (n &optional do-not-move)
"Rotate the yanking point by N places, and then return that kill.
If N is zero, `interprogram-paste-function' is set, and calling it
returns a string, then that string is added to the front of the
kill ring and returned as the latest kill.
If optional arg DO-NOT-MOVE is non-nil, then don't actually move the
yanking point; just return the Nth kill forward."
(let ((interprogram-paste (and (= n 0)
interprogram-paste-function
(funcall interprogram-paste-function))))
(if interprogram-paste
(progn
(let ((interprogram-cut-function nil))
(kill-new interprogram-paste))
interprogram-paste)
(or kill-ring (error "Kill ring is empty"))
(let ((ARGth-kill-element
(nthcdr (mod (- n (length kill-ring-yank-pointer))
(length kill-ring))
kill-ring)))
(or do-not-move
(setq kill-ring-yank-pointer ARGth-kill-element))
(car ARGth-kill-element)))))
(defcustom kill-read-only-ok nil
"*Non-nil means don't signal an error for killing read-only text."
:type 'boolean
:group 'killing)
(put 'text-read-only 'error-conditions
'(text-read-only buffer-read-only error))
(put 'text-read-only 'error-message "Text is read-only")
(defun kill-region (beg end)
"Kill between point and mark.
The text is deleted but saved in the kill ring.
The command \\[yank] can retrieve it from there.
\(If you want to kill and then yank immediately, use \\[copy-region-as-kill].)
If the buffer is read-only, Emacs will beep and refrain from deleting
the text, but put the text in the kill ring anyway. This means that
you can use the killing commands to copy text from a read-only buffer.
This is the primitive for programs to kill text (as opposed to deleting it).
Supply two arguments, character numbers indicating the stretch of text
to be killed.
Any command that calls this function is a \"kill command\".
If the previous command was also a kill command,
the text killed this time appends to the text killed last time
to make one entry in the kill ring."
(interactive "r")
(condition-case nil
(let ((undo-strong-limit (+ (- (max beg end) (min beg end))
100 undo-strong-limit))
(undo-limit (+ (- (max beg end) (min beg end)) 100 undo-limit))
(old-list buffer-undo-list)
tail
(string (if (or (eq buffer-undo-list t)
(= beg end))
(buffer-substring beg end))))
(delete-region beg end)
(setq tail buffer-undo-list)
(unless string
(while (not (stringp (car (car tail))))
(setq tail (cdr tail)))
(setq string (car (car tail))))
(if (eq last-command 'kill-region)
(kill-append string (< end beg))
(kill-new string))
(setq this-command 'kill-region))
((buffer-read-only text-read-only)
(copy-region-as-kill beg end)
(setq this-command 'kill-region)
(if kill-read-only-ok
(message "Read only text copied to kill ring")
(barf-if-buffer-read-only)
(signal 'text-read-only (list (current-buffer)))))))
(defun copy-region-as-kill (beg end)
"Save the region as if killed, but don't kill it.
In Transient Mark mode, deactivate the mark.
If `interprogram-cut-function' is non-nil, also save the text for a window
system cut and paste."
(interactive "r")
(if (eq last-command 'kill-region)
(kill-append (buffer-substring beg end) (< end beg))
(kill-new (buffer-substring beg end)))
(if transient-mark-mode
(setq deactivate-mark t))
nil)
(defun kill-ring-save (beg end)
"Save the region as if killed, but don't kill it.
In Transient Mark mode, deactivate the mark.
If `interprogram-cut-function' is non-nil, also save the text for a window
system cut and paste.
This command is similar to `copy-region-as-kill', except that it gives
visual feedback indicating the extent of the region being copied."
(interactive "r")
(copy-region-as-kill beg end)
(if (interactive-p)
(let ((other-end (if (= (point) beg) end beg))
(opoint (point))
(inhibit-quit t))
(if (pos-visible-in-window-p other-end (selected-window))
(progn
(set-marker (mark-marker) (point) (current-buffer))
(goto-char other-end)
(sit-for 1)
(set-marker (mark-marker) other-end (current-buffer))
(goto-char opoint)
(and quit-flag mark-active
(deactivate-mark)))
(let* ((killed-text (current-kill 0))
(message-len (min (length killed-text) 40)))
(if (= (point) beg)
(message "Saved text until \"%s\""
(substring killed-text (- message-len)))
(message "Saved text from \"%s\""
(substring killed-text 0 message-len))))))))
(defun append-next-kill (&optional interactive)
"Cause following command, if it kills, to append to previous kill.
The argument is used for internal purposes; do not supply one."
(interactive "p")
(if interactive
(progn
(setq this-command 'kill-region)
(message "If the next command is a kill, it will append"))
(setq last-command 'kill-region)))
(defun yank-pop (arg)
"Replace just-yanked stretch of killed text with a different stretch.
This command is allowed only immediately after a `yank' or a `yank-pop'.
At such a time, the region contains a stretch of reinserted
previously-killed text. `yank-pop' deletes that text and inserts in its
place a different stretch of killed text.
With no argument, the previous kill is inserted.
With argument N, insert the Nth previous kill.
If N is negative, this is a more recent kill.
The sequence of kills wraps around, so that after the oldest one
comes the newest one."
(interactive "*p")
(if (not (eq last-command 'yank))
(error "Previous command was not a yank"))
(setq this-command 'yank)
(let ((inhibit-read-only t)
(before (< (point) (mark t))))
(delete-region (point) (mark t))
(set-marker (mark-marker) (point) (current-buffer))
(let ((opoint (point)))
(insert (current-kill arg))
(let ((inhibit-read-only t))
(remove-text-properties opoint (point) '(read-only nil))))
(if before
(goto-char (prog1 (mark t)
(set-marker (mark-marker) (point) (current-buffer))))))
nil)
(defun yank (&optional arg)
"Reinsert the last stretch of killed text.
More precisely, reinsert the stretch of killed text most recently
killed OR yanked. Put point at end, and set mark at beginning.
With just C-u as argument, same but put point at beginning (and mark at end).
With argument N, reinsert the Nth most recently killed stretch of killed
text.
See also the command \\[yank-pop]."
(interactive "*P")
(setq this-command t)
(push-mark (point))
(let ((opoint (point)))
(insert (current-kill (cond
((listp arg) 0)
((eq arg '-) -1)
(t (1- arg)))))
(let ((inhibit-read-only t))
(remove-text-properties opoint (point) '(read-only nil))))
(if (consp arg)
(goto-char (prog1 (mark t)
(set-marker (mark-marker) (point) (current-buffer)))))
(setq this-command 'yank)
nil)
(defun rotate-yank-pointer (arg)
"Rotate the yanking point in the kill ring.
With argument, rotate that many kills forward (or backward, if negative)."
(interactive "p")
(current-kill arg))
(defun insert-buffer (buffer)
"Insert after point the contents of BUFFER.
Puts mark after the inserted text.
BUFFER may be a buffer or a buffer name."
(interactive
(list
(progn
(barf-if-buffer-read-only)
(read-buffer "Insert buffer: "
(if (eq (selected-window) (next-window (selected-window)))
(other-buffer (current-buffer))
(window-buffer (next-window (selected-window))))
t))))
(or (bufferp buffer)
(setq buffer (get-buffer buffer)))
(let (start end newmark)
(save-excursion
(save-excursion
(set-buffer buffer)
(setq start (point-min) end (point-max)))
(insert-buffer-substring buffer start end)
(setq newmark (point)))
(push-mark newmark))
nil)
(defun append-to-buffer (buffer start end)
"Append to specified buffer the text of the region.
It is inserted into that buffer before its point.
When calling from a program, give three arguments:
BUFFER (or buffer name), START and END.
START and END specify the portion of the current buffer to be copied."
(interactive
(list (read-buffer "Append to buffer: " (other-buffer (current-buffer) t))
(region-beginning) (region-end)))
(let ((oldbuf (current-buffer)))
(save-excursion
(set-buffer (get-buffer-create buffer))
(insert-buffer-substring oldbuf start end))))
(defun prepend-to-buffer (buffer start end)
"Prepend to specified buffer the text of the region.
It is inserted into that buffer after its point.
When calling from a program, give three arguments:
BUFFER (or buffer name), START and END.
START and END specify the portion of the current buffer to be copied."
(interactive "BPrepend to buffer: \nr")
(let ((oldbuf (current-buffer)))
(save-excursion
(set-buffer (get-buffer-create buffer))
(save-excursion
(insert-buffer-substring oldbuf start end)))))
(defun copy-to-buffer (buffer start end)
"Copy to specified buffer the text of the region.
It is inserted into that buffer, replacing existing text there.
When calling from a program, give three arguments:
BUFFER (or buffer name), START and END.
START and END specify the portion of the current buffer to be copied."
(interactive "BCopy to buffer: \nr")
(let ((oldbuf (current-buffer)))
(save-excursion
(set-buffer (get-buffer-create buffer))
(erase-buffer)
(save-excursion
(insert-buffer-substring oldbuf start end)))))
(put 'mark-inactive 'error-conditions '(mark-inactive error))
(put 'mark-inactive 'error-message "The mark is not active now")
(defun mark (&optional force)
"Return this buffer's mark value as integer; error if mark inactive.
If optional argument FORCE is non-nil, access the mark value
even if the mark is not currently active, and return nil
if there is no mark at all.
If you are using this in an editing command, you are most likely making
a mistake; see the documentation of `set-mark'."
(if (or force (not transient-mark-mode) mark-active mark-even-if-inactive)
(marker-position (mark-marker))
(signal 'mark-inactive nil)))
(defsubst deactivate-mark ()
"Deactivate the mark by setting `mark-active' to nil.
\(That makes a difference only in Transient Mark mode.)
Also runs the hook `deactivate-mark-hook'."
(if transient-mark-mode
(progn
(setq mark-active nil)
(run-hooks 'deactivate-mark-hook))))
(defun set-mark (pos)
"Set this buffer's mark to POS. Don't use this function!
That is to say, don't use this function unless you want
the user to see that the mark has moved, and you want the previous
mark position to be lost.
Normally, when a new mark is set, the old one should go on the stack.
This is why most applications should use push-mark, not set-mark.
Novice Emacs Lisp programmers often try to use the mark for the wrong
purposes. The mark saves a location for the user's convenience.
Most editing commands should not alter the mark.
To remember a location for internal use in the Lisp program,
store it in a Lisp variable. Example:
(let ((beg (point))) (forward-line 1) (delete-region beg (point)))."
(if pos
(progn
(setq mark-active t)
(run-hooks 'activate-mark-hook)
(set-marker (mark-marker) pos (current-buffer)))
(setq mark-active nil)
(run-hooks 'deactivate-mark-hook)
(set-marker (mark-marker) nil)))
(defvar mark-ring nil
"The list of former marks of the current buffer, most recent first.")
(make-variable-buffer-local 'mark-ring)
(put 'mark-ring 'permanent-local t)
(defcustom mark-ring-max 16
"*Maximum size of mark ring. Start discarding off end if gets this big."
:type 'integer
:group 'editing-basics)
(defvar global-mark-ring nil
"The list of saved global marks, most recent first.")
(defcustom global-mark-ring-max 16
"*Maximum size of global mark ring. \
Start discarding off end if gets this big."
:type 'integer
:group 'editing-basics)
(defun set-mark-command (arg)
"Set mark at where point is, or jump to mark.
With no prefix argument, set mark, push old mark position on local mark
ring, and push mark on global mark ring.
With argument, jump to mark, and pop a new position for mark off the ring
\(does not affect global mark ring\).
Novice Emacs Lisp programmers often try to use the mark for the wrong
purposes. See the documentation of `set-mark' for more information."
(interactive "P")
(if (null arg)
(progn
(push-mark nil nil t))
(if (null (mark t))
(error "No mark set in this buffer")
(goto-char (mark t))
(pop-mark))))
(defun push-mark (&optional location nomsg activate)
"Set mark at LOCATION (point, by default) and push old mark on mark ring.
If the last global mark pushed was not in the current buffer,
also push LOCATION on the global mark ring.
Display `Mark set' unless the optional second arg NOMSG is non-nil.
In Transient Mark mode, activate mark if optional third arg ACTIVATE non-nil.
Novice Emacs Lisp programmers often try to use the mark for the wrong
purposes. See the documentation of `set-mark' for more information.
In Transient Mark mode, this does not activate the mark."
(if (null (mark t))
nil
(setq mark-ring (cons (copy-marker (mark-marker)) mark-ring))
(if (> (length mark-ring) mark-ring-max)
(progn
(move-marker (car (nthcdr mark-ring-max mark-ring)) nil)
(setcdr (nthcdr (1- mark-ring-max) mark-ring) nil))))
(set-marker (mark-marker) (or location (point)) (current-buffer))
(if (and global-mark-ring
(eq (marker-buffer (car global-mark-ring)) (current-buffer)))
nil
(setq global-mark-ring (cons (copy-marker (mark-marker)) global-mark-ring))
(if (> (length global-mark-ring) global-mark-ring-max)
(progn
(move-marker (car (nthcdr global-mark-ring-max global-mark-ring))
nil)
(setcdr (nthcdr (1- global-mark-ring-max) global-mark-ring) nil))))
(or nomsg executing-kbd-macro (> (minibuffer-depth) 0)
(message "Mark set"))
(if (or activate (not transient-mark-mode))
(set-mark (mark t)))
nil)
(defun pop-mark ()
"Pop off mark ring into the buffer's actual mark.
Does not set point. Does nothing if mark ring is empty."
(if mark-ring
(progn
(setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker)))))
(set-marker (mark-marker) (+ 0 (car mark-ring)) (current-buffer))
(deactivate-mark)
(move-marker (car mark-ring) nil)
(if (null (mark t)) (ding))
(setq mark-ring (cdr mark-ring)))))
(defalias 'exchange-dot-and-mark 'exchange-point-and-mark)
(defun exchange-point-and-mark ()
"Put the mark where point is now, and point where the mark is now.
This command works even when the mark is not active,
and it reactivates the mark."
(interactive nil)
(let ((omark (mark t)))
(if (null omark)
(error "No mark set in this buffer"))
(set-mark (point))
(goto-char omark)
nil))
(defun transient-mark-mode (arg)
"Toggle Transient Mark mode.
With arg, turn Transient Mark mode on if arg is positive, off otherwise.
In Transient Mark mode, when the mark is active, the region is highlighted.
Changing the buffer \"deactivates\" the mark.
So do certain other operations that set the mark
but whose main purpose is something else--for example,
incremental search, \\[beginning-of-buffer], and \\[end-of-buffer]."
(interactive "P")
(setq transient-mark-mode
(if (null arg)
(not transient-mark-mode)
(> (prefix-numeric-value arg) 0)))
(if (interactive-p)
(if transient-mark-mode
(message "Transient Mark mode enabled")
(message "Transient Mark mode disabled"))))
(defun pop-global-mark ()
"Pop off global mark ring and jump to the top location."
(interactive)
(while (and global-mark-ring (not (marker-buffer (car global-mark-ring))))
(setq global-mark-ring (cdr global-mark-ring)))
(or global-mark-ring
(error "No global mark set"))
(let* ((marker (car global-mark-ring))
(buffer (marker-buffer marker))
(position (marker-position marker)))
(setq global-mark-ring (nconc (cdr global-mark-ring)
(list (car global-mark-ring))))
(set-buffer buffer)
(or (and (>= position (point-min))
(<= position (point-max)))
(widen))
(goto-char position)
(switch-to-buffer buffer)))
(defcustom next-line-add-newlines t
"*If non-nil, `next-line' inserts newline to avoid `end of buffer' error."
:type 'boolean
:group 'editing-basics)
(defun next-line (arg)
"Move cursor vertically down ARG lines.
If there is no character in the target line exactly under the current column,
the cursor is positioned after the character in that line which spans this
column, or at the end of the line if it is not long enough.
If there is no line in the buffer after this one, behavior depends on the
value of `next-line-add-newlines'. If non-nil, it inserts a newline character
to create a line, and moves the cursor to that line. Otherwise it moves the
cursor to the end of the buffer.
The command \\[set-goal-column] can be used to create
a semipermanent goal column for this command.
Then instead of trying to move exactly vertically (or as close as possible),
this command moves to the specified goal column (or as close as possible).
The goal column is stored in the variable `goal-column', which is nil
when there is no goal column.
If you are thinking of using this in a Lisp program, consider
using `forward-line' instead. It is usually easier to use
and more reliable (no dependence on goal column, etc.)."
(interactive "p")
(if (and next-line-add-newlines (= arg 1))
(let ((opoint (point)))
(end-of-line)
(if (eobp)
(newline 1)
(goto-char opoint)
(line-move arg)))
(if (interactive-p)
(condition-case nil
(line-move arg)
((beginning-of-buffer end-of-buffer) (ding)))
(line-move arg)))
nil)
(defun previous-line (arg)
"Move cursor vertically up ARG lines.
If there is no character in the target line exactly over the current column,
the cursor is positioned after the character in that line which spans this
column, or at the end of the line if it is not long enough.
The command \\[set-goal-column] can be used to create
a semipermanent goal column for this command.
Then instead of trying to move exactly vertically (or as close as possible),
this command moves to the specified goal column (or as close as possible).
The goal column is stored in the variable `goal-column', which is nil
when there is no goal column.
If you are thinking of using this in a Lisp program, consider using
`forward-line' with a negative argument instead. It is usually easier
to use and more reliable (no dependence on goal column, etc.)."
(interactive "p")
(if (interactive-p)
(condition-case nil
(line-move (- arg))
((beginning-of-buffer end-of-buffer) (ding)))
(line-move (- arg)))
nil)
(defcustom track-eol nil
"*Non-nil means vertical motion starting at end of line keeps to ends of lines.
This means moving to the end of each line moved onto.
The beginning of a blank line does not count as the end of a line."
:type 'boolean
:group 'editing-basics)
(defcustom goal-column nil
"*Semipermanent goal column for vertical motion, as set by \\[set-goal-column], or nil."
:type '(choice integer
(const :tag "None" nil))
:group 'editing-basics)
(make-variable-buffer-local 'goal-column)
(defvar temporary-goal-column 0
"Current goal column for vertical motion.
It is the column where point was
at the start of current run of vertical motion commands.
When the `track-eol' feature is doing its job, the value is 9999.")
(defcustom line-move-ignore-invisible nil
"*Non-nil means \\[next-line] and \\[previous-line] ignore invisible lines.
Outline mode sets this."
:type 'boolean
:group 'editing-basics)
(defun line-move (arg)
(let ((inhibit-point-motion-hooks t)
(opoint (point))
new line-end line-beg)
(unwind-protect
(progn
(if (not (or (eq last-command 'next-line)
(eq last-command 'previous-line)))
(setq temporary-goal-column
(if (and track-eol (eolp)
(or (not (bolp)) (eq last-command 'end-of-line)))
9999
(current-column))))
(if (and (not (integerp selective-display))
(not line-move-ignore-invisible))
(or (if (> arg 0)
(progn (if (> arg 1) (forward-line (1- arg)))
(end-of-line)
(zerop (forward-line 1)))
(and (zerop (forward-line arg))
(bolp)))
(signal (if (< arg 0)
'beginning-of-buffer
'end-of-buffer)
nil))
(while (> arg 0)
(end-of-line)
(and (zerop (vertical-motion 1))
(signal 'end-of-buffer nil))
(while (and (not (eobp))
(let ((prop
(get-char-property (point) 'invisible)))
(if (eq buffer-invisibility-spec t)
prop
(or (memq prop buffer-invisibility-spec)
(assq prop buffer-invisibility-spec)))))
(if (get-text-property (point) 'invisible)
(goto-char (next-single-property-change (point) 'invisible))
(goto-char (next-overlay-change (point)))))
(setq arg (1- arg)))
(while (< arg 0)
(beginning-of-line)
(and (zerop (vertical-motion -1))
(signal 'beginning-of-buffer nil))
(while (and (not (bobp))
(let ((prop
(get-char-property (1- (point)) 'invisible)))
(if (eq buffer-invisibility-spec t)
prop
(or (memq prop buffer-invisibility-spec)
(assq prop buffer-invisibility-spec)))))
(if (get-text-property (1- (point)) 'invisible)
(goto-char (previous-single-property-change (point) 'invisible))
(goto-char (previous-overlay-change (point)))))
(setq arg (1+ arg))))
(let ((buffer-invisibility-spec nil))
(move-to-column (or goal-column temporary-goal-column))))
(setq new (point))
(setq line-end (save-excursion (end-of-line) (point)))
(setq line-beg (save-excursion (beginning-of-line) (point)))
(let ((after (and (< new (point-max))
(get-char-property new 'intangible)))
(before (and (> new (point-min))
(get-char-property (1- new) 'intangible))))
(when (and before (eq before after)
(not (bolp)))
(goto-char (point-min))
(let ((inhibit-point-motion-hooks nil))
(goto-char new))
(if (<= new line-end)
(setq new (point)))))
(goto-char opoint)
(setq inhibit-point-motion-hooks nil)
(goto-char new)
(when (or (< (point) line-beg) (> (point) line-end))
(setq new (point))
(setq inhibit-point-motion-hooks t)
(setq line-end (save-excursion (end-of-line) (point)))
(beginning-of-line)
(setq line-beg (point))
(let ((buffer-invisibility-spec nil))
(move-to-column (or goal-column temporary-goal-column)))
(if (<= (point) line-end)
(setq new (point)))
(goto-char (point-min))
(setq inhibit-point-motion-hooks nil)
(goto-char new)
)))
nil)
(put 'set-goal-column 'disabled t)
(defun set-goal-column (arg)
"Set the current horizontal position as a goal for \\[next-line] and \\[previous-line].
Those commands will move to this position in the line moved to
rather than trying to keep the same horizontal position.
With a non-nil argument, clears out the goal column
so that \\[next-line] and \\[previous-line] resume vertical motion.
The goal column is stored in the variable `goal-column'."
(interactive "P")
(if arg
(progn
(setq goal-column nil)
(message "No goal column"))
(setq goal-column (current-column))
(message (substitute-command-keys
"Goal column %d (use \\[set-goal-column] with an arg to unset it)")
goal-column))
nil)
(defcustom hscroll-step 0
"*The number of columns to try scrolling a window by when point moves out.
If that fails to bring point back on frame, point is centered instead.
If this is zero, point is always centered after it moves off frame."
:type '(choice (const :tag "Alway Center" 0)
(integer :format "%v" 1))
:group 'editing-basics)
(defun hscroll-point-visible ()
"Scrolls the selected window horizontally to make point visible."
(save-excursion
(set-buffer (window-buffer))
(if (not (or truncate-lines
(> (window-hscroll) 0)
(and truncate-partial-width-windows
(< (window-width) (frame-width)))))
()
(and (< (point) (window-start))
(let ((ws-bol (save-excursion
(goto-char (window-start))
(beginning-of-line)
(point))))
(and (>= (point) ws-bol)
(set-window-start nil ws-bol))))
(let* ((here (hscroll-window-column))
(left (min (window-hscroll) 1))
(right (1- (window-width))))
(if (not (and (= here right)
(= (following-char) ?\n)))
(setq right (1- right)))
(cond
((or (< here (- left hscroll-step))
(> here (+ right hscroll-step)))
(let ((eol (save-excursion (end-of-line) (hscroll-window-column))))
(scroll-left (min (- here (/ (window-width) 2))
(- eol (window-width) -5)))))
((< here left)
(scroll-right hscroll-step))
((> here right)
(scroll-left hscroll-step)))))))
(defun hscroll-window-column ()
(let* ((hscroll (window-hscroll))
(startpos (save-excursion
(beginning-of-line)
(if (= (point) (save-excursion
(goto-char (window-start))
(beginning-of-line)
(point)))
(goto-char (window-start)))
(point)))
(hpos (+ (if (and (eq (selected-window) (minibuffer-window))
(= 1 (window-start))
(= startpos (point-min)))
(minibuffer-prompt-width)
0)
(min 0 (- 1 hscroll))))
val)
(car (cdr (compute-motion startpos (cons hpos 0)
(point) (cons 0 1)
1000000 (cons hscroll 0) nil)))))
(defun scroll-other-window-down (lines)
"Scroll the \"other window\" down.
For more details, see the documentation for `scroll-other-window'."
(interactive "P")
(scroll-other-window
(if (eq lines '-) nil
(if (null lines) '-
(- (prefix-numeric-value lines))))))
(define-key esc-map [?\C-\S-v] 'scroll-other-window-down)
(defun beginning-of-buffer-other-window (arg)
"Move point to the beginning of the buffer in the other window.
Leave mark at previous position.
With arg N, put point N/10 of the way from the true beginning."
(interactive "P")
(let ((orig-window (selected-window))
(window (other-window-for-scrolling)))
(unwind-protect
(progn
(select-window window)
(beginning-of-buffer arg)
(recenter '(t)))
(select-window orig-window))))
(defun end-of-buffer-other-window (arg)
"Move point to the end of the buffer in the other window.
Leave mark at previous position.
With arg N, put point N/10 of the way from the true end."
(interactive "P")
(let ((orig-window (selected-window))
(window (other-window-for-scrolling)))
(unwind-protect
(progn
(select-window window)
(end-of-buffer arg)
(recenter '(t)))
(select-window orig-window))))
(defun transpose-chars (arg)
"Interchange characters around point, moving forward one character.
With prefix arg ARG, effect is to take character before point
and drag it forward past ARG other characters (backward if ARG negative).
If no argument and at end of line, the previous two chars are exchanged."
(interactive "*P")
(and (null arg) (eolp) (forward-char -1))
(transpose-subr 'forward-char (prefix-numeric-value arg)))
(defun transpose-words (arg)
"Interchange words around point, leaving point at end of them.
With prefix arg ARG, effect is to take word before or around point
and drag it forward past ARG other words (backward if ARG negative).
If ARG is zero, the words around or after point and around or after mark
are interchanged."
(interactive "*p")
(transpose-subr 'forward-word arg))
(defun transpose-sexps (arg)
"Like \\[transpose-words] but applies to sexps.
Does not work on a sexp that point is in the middle of
if it is a list or string."
(interactive "*p")
(transpose-subr 'forward-sexp arg))
(defun transpose-lines (arg)
"Exchange current line and previous line, leaving point after both.
With argument ARG, takes previous line and moves it past ARG lines.
With argument 0, interchanges line point is in with line mark is in."
(interactive "*p")
(transpose-subr (function
(lambda (arg)
(if (> arg 0)
(progn
(setq arg (forward-line arg))
(if (/= (preceding-char) ?\n)
(setq arg (1+ arg)))
(if (> arg 0)
(newline arg)))
(forward-line arg))))
arg))
(defvar transpose-subr-start1)
(defvar transpose-subr-start2)
(defvar transpose-subr-end1)
(defvar transpose-subr-end2)
(defun transpose-subr (mover arg)
(let (transpose-subr-start1
transpose-subr-end1
transpose-subr-start2
transpose-subr-end2)
(if (= arg 0)
(progn
(save-excursion
(funcall mover 1)
(setq transpose-subr-end2 (point))
(funcall mover -1)
(setq transpose-subr-start2 (point))
(goto-char (mark))
(funcall mover 1)
(setq transpose-subr-end1 (point))
(funcall mover -1)
(setq transpose-subr-start1 (point))
(transpose-subr-1))
(exchange-point-and-mark))
(if (> arg 0)
(progn
(funcall mover -1)
(setq transpose-subr-start1 (point))
(funcall mover 1)
(setq transpose-subr-end1 (point))
(funcall mover arg)
(setq transpose-subr-end2 (point))
(funcall mover (- arg))
(setq transpose-subr-start2 (point))
(transpose-subr-1)
(goto-char transpose-subr-end2))
(funcall mover -1)
(setq transpose-subr-start2 (point))
(funcall mover 1)
(setq transpose-subr-end2 (point))
(funcall mover (1- arg))
(setq transpose-subr-start1 (point))
(funcall mover (- arg))
(setq transpose-subr-end1 (point))
(transpose-subr-1)))))
(defun transpose-subr-1 ()
(if (> (min transpose-subr-end1 transpose-subr-end2)
(max transpose-subr-start1 transpose-subr-start2))
(error "Don't have two things to transpose"))
(let* ((word1 (buffer-substring transpose-subr-start1 transpose-subr-end1))
(len1 (length word1))
(word2 (buffer-substring transpose-subr-start2 transpose-subr-end2))
(len2 (length word2)))
(delete-region transpose-subr-start2 transpose-subr-end2)
(goto-char transpose-subr-start2)
(insert word1)
(goto-char (if (< transpose-subr-start1 transpose-subr-start2)
transpose-subr-start1
(+ transpose-subr-start1 (- len1 len2))))
(delete-region (point) (+ (point) len1))
(insert word2)))
(defcustom comment-column 32
"*Column to indent right-margin comments to.
Setting this variable automatically makes it local to the current buffer.
Each mode establishes a different default value for this variable; you
can set the value for a particular mode using that mode's hook."
:type 'integer
:group 'fill-comments)
(make-variable-buffer-local 'comment-column)
(defcustom comment-start nil
"*String to insert to start a new comment, or nil if no comment syntax."
:type '(choice (const :tag "None" nil)
string)
:group 'fill-comments)
(defcustom comment-start-skip nil
"*Regexp to match the start of a comment plus everything up to its body.
If there are any \\(...\\) pairs, the comment delimiter text is held to begin
at the place matched by the close of the first pair."
:type '(choice (const :tag "None" nil)
regexp)
:group 'fill-comments)
(defcustom comment-end ""
"*String to insert to end a new comment.
Should be an empty string if comments are terminated by end-of-line."
:type 'string
:group 'fill-comments)
(defvar comment-indent-hook nil
"Obsolete variable for function to compute desired indentation for a comment.
This function is called with no args with point at the beginning of
the comment's starting delimiter.")
(defvar comment-indent-function
'(lambda () comment-column)
"Function to compute desired indentation for a comment.
This function is called with no args with point at the beginning of
the comment's starting delimiter.")
(defcustom block-comment-start nil
"*String to insert to start a new comment on a line by itself.
If nil, use `comment-start' instead.
Note that the regular expression `comment-start-skip' should skip this string
as well as the `comment-start' string."
:type '(choice (const :tag "Use comment-start" nil)
string)
:group 'fill-comments)
(defcustom block-comment-end nil
"*String to insert to end a new comment on a line by itself.
Should be an empty string if comments are terminated by end-of-line.
If nil, use `comment-end' instead."
:type '(choice (const :tag "Use comment-end" nil)
string)
:group 'fill-comments)
(defun indent-for-comment ()
"Indent this line's comment to comment column, or insert an empty comment."
(interactive "*")
(let* ((empty (save-excursion (beginning-of-line)
(looking-at "[ \t]*$")))
(starter (or (and empty block-comment-start) comment-start))
(ender (or (and empty block-comment-end) comment-end)))
(cond
((null starter)
(error "No comment syntax defined"))
((null comment-start-skip)
(error "This mode doesn't define `comment-start-skip'"))
(t (let* ((eolpos (save-excursion (end-of-line) (point)))
cpos indent begpos)
(beginning-of-line)
(if (re-search-forward comment-start-skip eolpos 'move)
(progn (setq cpos (point-marker))
(if (match-end 1)
(goto-char (match-end 1))
(skip-syntax-backward " " (match-beginning 0))
(skip-syntax-backward "^ " (match-beginning 0)))))
(setq begpos (point))
(if (= (current-column)
(setq indent (if comment-indent-hook
(funcall comment-indent-hook)
(funcall comment-indent-function))))
(goto-char begpos)
(skip-chars-backward " \t")
(delete-region (point) begpos)
(indent-to indent))
(if cpos
(progn (goto-char cpos)
(set-marker cpos nil))
(insert starter)
(save-excursion
(insert ender))))))))
(defun set-comment-column (arg)
"Set the comment column based on point.
With no arg, set the comment column to the current column.
With just minus as arg, kill any comment on this line.
With any other arg, set comment column to indentation of the previous comment
and then align or create a comment on this line at that column."
(interactive "P")
(if (eq arg '-)
(kill-comment nil)
(if arg
(progn
(save-excursion
(beginning-of-line)
(re-search-backward comment-start-skip)
(beginning-of-line)
(re-search-forward comment-start-skip)
(goto-char (match-beginning 0))
(setq comment-column (current-column))
(message "Comment column set to %d" comment-column))
(indent-for-comment))
(setq comment-column (current-column))
(message "Comment column set to %d" comment-column))))
(defun kill-comment (arg)
"Kill the comment on this line, if any.
With argument, kill comments on that many lines starting with this one."
(interactive "P")
(or comment-start-skip (error "No comment syntax defined"))
(let ((count (prefix-numeric-value arg)) endc)
(while (> count 0)
(save-excursion
(end-of-line)
(setq endc (point))
(beginning-of-line)
(and (string< "" comment-end)
(setq endc
(progn
(re-search-forward (regexp-quote comment-end) endc 'move)
(skip-chars-forward " \t")
(point))))
(beginning-of-line)
(if (re-search-forward comment-start-skip endc t)
(progn
(goto-char (match-beginning 0))
(skip-chars-backward " \t")
(kill-region (point) endc)
(indent-according-to-mode))))
(if arg (forward-line 1))
(setq count (1- count)))))
(defvar comment-padding 1
"Number of spaces `comment-region' puts between comment chars and text.
Extra spacing between the comment characters and the comment text
makes the comment easier to read. Default is 1. Nil means 0 and is
more efficient.")
(defun comment-region (beg end &optional arg)
"Comment or uncomment each line in the region.
With just C-u prefix arg, uncomment each line in region.
Numeric prefix arg ARG means use ARG comment characters.
If ARG is negative, delete that many comment characters instead.
Comments are terminated on each line, even for syntax in which newline does
not end the comment. Blank lines do not get comments."
(interactive "r\nP")
(or comment-start (error "No comment syntax is defined"))
(if (> beg end) (let (mid) (setq mid beg beg end end mid)))
(save-excursion
(save-restriction
(let ((cs comment-start) (ce comment-end)
(cp (when comment-padding
(make-string comment-padding ? )))
numarg)
(if (consp arg) (setq numarg t)
(setq numarg (prefix-numeric-value arg))
(while (> numarg 1)
(setq cs (concat cs comment-start)
ce (concat ce comment-end))
(setq numarg (1- numarg))))
(narrow-to-region beg end)
(goto-char beg)
(if (or (eq numarg t) (< numarg 0))
(while (not (eobp))
(let (found-comment)
(if (eq numarg t)
(while (looking-at (regexp-quote cs))
(setq found-comment t)
(delete-char (length cs)))
(let ((count numarg))
(while (and (> 1 (setq count (1+ count)))
(looking-at (regexp-quote cs)))
(setq found-comment t)
(delete-char (length cs)))))
(when (and found-comment comment-padding
(looking-at (regexp-quote cp)))
(delete-char comment-padding))
(if (string= "" ce)
nil
(if (eq numarg t)
(progn
(end-of-line)
(while (progn (skip-chars-backward " \t")
(and (>= (- (point) (point-min)) (length ce))
(save-excursion
(backward-char (length ce))
(looking-at (regexp-quote ce)))))
(delete-char (- (length ce)))))
(let ((count numarg))
(while (> 1 (setq count (1+ count)))
(end-of-line)
(skip-chars-backward " \t")
(if (>= (- (point) (point-min)) (length ce))
(save-excursion
(backward-char (length ce))
(if (looking-at (regexp-quote ce))
(delete-char (length ce)))))))))
(forward-line 1)))
(when comment-padding
(setq cs (concat cs cp)))
(while (not (eobp))
(if (looking-at "[ \t]*$") ()
(insert cs)
(if (string= "" ce) ()
(end-of-line)
(insert ce)))
(search-forward "\n" nil 'move)))))))
(defun backward-word (arg)
"Move backward until encountering the end of a word.
With argument, do this that many times.
In programs, it is faster to call `forward-word' with negative arg."
(interactive "p")
(forward-word (- arg)))
(defun mark-word (arg)
"Set mark arg words away from point."
(interactive "p")
(push-mark
(save-excursion
(forward-word arg)
(point))
nil t))
(defun kill-word (arg)
"Kill characters forward until encountering the end of a word.
With argument, do this that many times."
(interactive "p")
(kill-region (point) (progn (forward-word arg) (point))))
(defun backward-kill-word (arg)
"Kill characters backward until encountering the end of a word.
With argument, do this that many times."
(interactive "p")
(kill-word (- arg)))
(defun current-word (&optional strict)
"Return the word point is on (or a nearby word) as a string.
If optional arg STRICT is non-nil, return nil unless point is within
or adjacent to a word."
(save-excursion
(let ((oldpoint (point)) (start (point)) (end (point)))
(skip-syntax-backward "w_") (setq start (point))
(goto-char oldpoint)
(skip-syntax-forward "w_") (setq end (point))
(if (and (eq start oldpoint) (eq end oldpoint))
(and (not strict)
(progn
(skip-syntax-backward "^w_"
(save-excursion (beginning-of-line)
(point)))
(if (bolp)
(progn
(skip-syntax-forward "^w_"
(save-excursion (end-of-line)
(point)))
(setq start (point))
(skip-syntax-forward "w_")
(setq end (point)))
(setq end (point))
(skip-syntax-backward "w_")
(setq start (point)))
(buffer-substring-no-properties start end)))
(buffer-substring-no-properties start end)))))
(defcustom fill-prefix nil
"*String for filling to insert at front of new line, or nil for none.
Setting this variable automatically makes it local to the current buffer."
:type '(choice (const :tag "None" nil)
string)
:group 'fill)
(make-variable-buffer-local 'fill-prefix)
(defcustom auto-fill-inhibit-regexp nil
"*Regexp to match lines which should not be auto-filled."
:type '(choice (const :tag "None" nil)
regexp)
:group 'fill)
(defvar comment-line-break-function 'indent-new-comment-line
"*Mode-specific function which line breaks and continues a comment.
This function is only called during auto-filling of a comment section.
The function should take a single optional argument, which is a flag
indicating whether it should use soft newlines.
Setting this variable automatically makes it local to the current buffer.")
(defun do-auto-fill ()
(let (fc justify bol give-up
(fill-prefix fill-prefix))
(if (or (not (setq justify (current-justification)))
(null (setq fc (current-fill-column)))
(and (eq justify 'left)
(<= (current-column) fc))
(save-excursion (beginning-of-line)
(setq bol (point))
(and auto-fill-inhibit-regexp
(looking-at auto-fill-inhibit-regexp))))
nil (if (memq justify '(full center right))
(save-excursion (unjustify-current-line)))
(if (and adaptive-fill-mode
(or (null fill-prefix) (string= fill-prefix "")))
(let ((prefix
(fill-context-prefix
(save-excursion (backward-paragraph 1) (point))
(save-excursion (forward-paragraph 1) (point)))))
(and prefix (not (equal prefix ""))
(setq fill-prefix prefix))))
(while (and (not give-up) (> (current-column) fc))
(let* (after-prefix
(fill-point
(let ((opoint (point))
bounce
(first t))
(save-excursion
(beginning-of-line)
(setq after-prefix (point))
(and fill-prefix
(looking-at (regexp-quote fill-prefix))
(setq after-prefix (match-end 0)))
(move-to-column (1+ fc))
(while (or first
(and (not (bobp))
(not bounce)
sentence-end-double-space
(save-excursion (forward-char -1)
(and (looking-at "\\. ")
(not (looking-at "\\. ")))))
(and (not (bobp))
(not bounce)
fill-nobreak-predicate
(funcall fill-nobreak-predicate)))
(setq first nil)
(re-search-backward "[ \t]\\|\\c|.\\|.\\c|\\|^")
(if (<= (point) after-prefix)
(progn
(goto-char after-prefix)
(re-search-forward "[ \t]" opoint t)
(setq bounce t))
(if (looking-at "[ \t]")
(skip-chars-backward " \t")
(forward-char 1))))
(if enable-multibyte-characters
(if (not (and (eq (charset-after (1- (point))) 'ascii)
(eq (charset-after (point)) 'ascii)))
(fill-find-break-point after-prefix)))
(skip-chars-backward " \t")
(point)))))
(if (save-excursion
(goto-char fill-point)
(and (not (bolp))
(not (save-excursion (skip-chars-forward " ") (eolp)))
(not (and after-prefix (<= (point) after-prefix)))
(not (and comment-start-skip
(let ((limit (point)))
(beginning-of-line)
(and (re-search-forward comment-start-skip
limit t)
(eq (point) limit)))))))
(let ((prev-column (current-column)))
(if (save-excursion
(skip-chars-backward " \t")
(= (point) fill-point))
(funcall comment-line-break-function t)
(save-excursion
(goto-char fill-point)
(funcall comment-line-break-function t)))
(if (not (eq justify 'left))
(save-excursion
(end-of-line 0)
(justify-current-line justify nil t)))
(if (>= (current-column) prev-column)
(setq give-up t)))
(setq give-up t))))
(justify-current-line justify t t)
t)))
(defvar normal-auto-fill-function 'do-auto-fill
"The function to use for `auto-fill-function' if Auto Fill mode is turned on.
Some major modes set this.")
(defun auto-fill-mode (&optional arg)
"Toggle Auto Fill mode.
With arg, turn Auto Fill mode on if and only if arg is positive.
In Auto Fill mode, inserting a space at a column beyond `current-fill-column'
automatically breaks the line at a previous space.
The value of `normal-auto-fill-function' specifies the function to use
for `auto-fill-function' when turning Auto Fill mode on."
(interactive "P")
(prog1 (setq auto-fill-function
(if (if (null arg)
(not auto-fill-function)
(> (prefix-numeric-value arg) 0))
normal-auto-fill-function
nil))
(force-mode-line-update)))
(defun auto-fill-function ()
"Automatically break line at a previous space, in insertion of text."
nil)
(defun turn-on-auto-fill ()
"Unconditionally turn on Auto Fill mode."
(auto-fill-mode 1))
(custom-add-option 'text-mode-hook 'turn-on-auto-fill)
(defun set-fill-column (arg)
"Set `fill-column' to specified argument.
Use \\[universal-argument] followed by a number to specify a column.
Just \\[universal-argument] as argument means to use the current column."
(interactive "P")
(if (consp arg)
(setq arg (current-column)))
(if (not (integerp arg))
(error "set-fill-column requires an explicit argument")
(message "Fill column set to %d (was %d)" arg fill-column)
(setq fill-column arg)))
(defcustom comment-multi-line nil
"*Non-nil means \\[indent-new-comment-line] should continue same comment
on new line, with no new terminator or starter.
This is obsolete because you might as well use \\[newline-and-indent]."
:type 'boolean
:group 'fill-comments)
(defun indent-new-comment-line (&optional soft)
"Break line at point and indent, continuing comment if within one.
This indents the body of the continued comment
under the previous comment line.
This command is intended for styles where you write a comment per line,
starting a new comment (and terminating it if necessary) on each line.
If you want to continue one comment across several lines, use \\[newline-and-indent].
If a fill column is specified, it overrides the use of the comment column
or comment indentation.
The inserted newline is marked hard if `use-hard-newlines' is true,
unless optional argument SOFT is non-nil."
(interactive)
(let (comcol comstart)
(skip-chars-backward " \t")
(delete-region (point)
(progn (skip-chars-forward " \t")
(point)))
(if soft (insert-and-inherit ?\n) (newline 1))
(if fill-prefix
(progn
(indent-to-left-margin)
(insert-and-inherit fill-prefix))
(if (not comment-multi-line)
(save-excursion
(if (and comment-start-skip
(let ((opoint (1- (point)))
inside)
(forward-line -1)
(while (and (re-search-forward comment-start-skip opoint t)
(not (setq inside (or (equal comment-end "")
(not (search-forward comment-end opoint t)))))))
inside))
(let ((win (or (match-end 1) (match-beginning 0))))
(while (and (eolp) (not (bobp))
(let (opoint)
(beginning-of-line)
(setq opoint (point))
(forward-line -1)
(re-search-forward comment-start-skip opoint t)))
(setq win (or (match-end 1) (match-beginning 0))))
(goto-char win)
(setq comcol (current-column))
(setq comstart
(buffer-substring (point) (match-end 0)))))))
(if comcol
(let ((comment-column comcol)
(comment-start comstart)
(comment-end comment-end))
(and comment-end (not (equal comment-end ""))
(progn
(forward-char -1)
(insert comment-end)
(forward-char 1))
)
(if (not (eolp))
(setq comment-end ""))
(insert-and-inherit ?\n)
(forward-char -1)
(indent-for-comment)
(save-excursion
(end-of-line)
(delete-char 1)))
(indent-according-to-mode)))))
(defun set-selective-display (arg)
"Set `selective-display' to ARG; clear it if no arg.
When the value of `selective-display' is a number > 0,
lines whose indentation is >= that value are not displayed.
The variable `selective-display' has a separate value for each buffer."
(interactive "P")
(if (eq selective-display t)
(error "selective-display already in use for marked lines"))
(let ((current-vpos
(save-restriction
(narrow-to-region (point-min) (point))
(goto-char (window-start))
(vertical-motion (window-height)))))
(setq selective-display
(and arg (prefix-numeric-value arg)))
(recenter current-vpos))
(set-window-start (selected-window) (window-start (selected-window)))
(princ "selective-display set to " t)
(prin1 selective-display t)
(princ "." t))
(defvar overwrite-mode-textual " Ovwrt"
"The string displayed in the mode line when in overwrite mode.")
(defvar overwrite-mode-binary " Bin Ovwrt"
"The string displayed in the mode line when in binary overwrite mode.")
(defun overwrite-mode (arg)
"Toggle overwrite mode.
With arg, turn overwrite mode on iff arg is positive.
In overwrite mode, printing characters typed in replace existing text
on a one-for-one basis, rather than pushing it to the right. At the
end of a line, such characters extend the line. Before a tab,
such characters insert until the tab is filled in.
\\[quoted-insert] still inserts characters in overwrite mode; this
is supposed to make it easier to insert characters when necessary."
(interactive "P")
(setq overwrite-mode
(if (if (null arg) (not overwrite-mode)
(> (prefix-numeric-value arg) 0))
'overwrite-mode-textual))
(force-mode-line-update))
(defun binary-overwrite-mode (arg)
"Toggle binary overwrite mode.
With arg, turn binary overwrite mode on iff arg is positive.
In binary overwrite mode, printing characters typed in replace
existing text. Newlines are not treated specially, so typing at the
end of a line joins the line to the next, with the typed character
between them. Typing before a tab character simply replaces the tab
with the character typed.
\\[quoted-insert] replaces the text at the cursor, just as ordinary
typing characters do.
Note that binary overwrite mode is not its own minor mode; it is a
specialization of overwrite-mode, entered by setting the
`overwrite-mode' variable to `overwrite-mode-binary'."
(interactive "P")
(setq overwrite-mode
(if (if (null arg)
(not (eq overwrite-mode 'overwrite-mode-binary))
(> (prefix-numeric-value arg) 0))
'overwrite-mode-binary))
(force-mode-line-update))
(defcustom line-number-mode t
"*Non-nil means display line number in mode line."
:type 'boolean
:group 'editing-basics)
(defun line-number-mode (arg)
"Toggle Line Number mode.
With arg, turn Line Number mode on iff arg is positive.
When Line Number mode is enabled, the line number appears
in the mode line.
Line numbers do not appear for very large buffers, see variable
`line-number-display-limit'."
(interactive "P")
(setq line-number-mode
(if (null arg) (not line-number-mode)
(> (prefix-numeric-value arg) 0)))
(force-mode-line-update))
(defcustom column-number-mode nil
"*Non-nil means display column number in mode line."
:type 'boolean
:group 'editing-basics)
(defun column-number-mode (arg)
"Toggle Column Number mode.
With arg, turn Column Number mode on iff arg is positive.
When Column Number mode is enabled, the column number appears
in the mode line."
(interactive "P")
(setq column-number-mode
(if (null arg) (not column-number-mode)
(> (prefix-numeric-value arg) 0)))
(force-mode-line-update))
(defgroup paren-blinking nil
"Blinking matching of parens and expressions."
:prefix "blink-matching-"
:group 'paren-matching)
(defcustom blink-matching-paren t
"*Non-nil means show matching open-paren when close-paren is inserted."
:type 'boolean
:group 'paren-blinking)
(defcustom blink-matching-paren-on-screen t
"*Non-nil means show matching open-paren when it is on screen.
If nil, means don't show it (but the open-paren can still be shown
when it is off screen)."
:type 'boolean
:group 'paren-blinking)
(defcustom blink-matching-paren-distance (* 25 1024)
"*If non-nil, is maximum distance to search for matching open-paren."
:type 'integer
:group 'paren-blinking)
(defcustom blink-matching-delay 1
"*Time in seconds to delay after showing a matching paren."
:type 'number
:group 'paren-blinking)
(defcustom blink-matching-paren-dont-ignore-comments nil
"*Non-nil means `blink-matching-paren' will not ignore comments."
:type 'boolean
:group 'paren-blinking)
(defun blink-matching-open ()
"Move cursor momentarily to the beginning of the sexp before point."
(interactive)
(and (> (point) (1+ (point-min)))
blink-matching-paren
(= 1 (logand 1 (- (point)
(save-excursion
(forward-char -1)
(skip-syntax-backward "/\\")
(point)))))
(let* ((oldpos (point))
(blinkpos)
(mismatch))
(save-excursion
(save-restriction
(if blink-matching-paren-distance
(narrow-to-region (max (point-min)
(- (point) blink-matching-paren-distance))
oldpos))
(condition-case ()
(let ((parse-sexp-ignore-comments
(and parse-sexp-ignore-comments
(not blink-matching-paren-dont-ignore-comments))))
(setq blinkpos (scan-sexps oldpos -1)))
(error nil)))
(and blinkpos
(/= (char-syntax (char-after blinkpos))
?\$)
(setq mismatch
(or (null (matching-paren (char-after blinkpos)))
(/= (char-after (1- oldpos))
(matching-paren (char-after blinkpos))))))
(if mismatch (setq blinkpos nil))
(if blinkpos
(let (message-log-max)
(goto-char blinkpos)
(if (pos-visible-in-window-p)
(and blink-matching-paren-on-screen
(sit-for blink-matching-delay))
(goto-char blinkpos)
(message
"Matches %s"
(if (save-excursion
(skip-chars-backward " \t")
(not (bolp)))
(buffer-substring (progn (beginning-of-line) (point))
(1+ blinkpos))
(if (save-excursion
(forward-char 1)
(skip-chars-forward " \t")
(not (eolp)))
(buffer-substring blinkpos
(progn (end-of-line) (point)))
(if (save-excursion
(skip-chars-backward "\n \t")
(not (bobp)))
(concat
(buffer-substring (progn
(skip-chars-backward "\n \t")
(beginning-of-line)
(point))
(progn (end-of-line)
(skip-chars-backward " \t")
(point)))
"..."
(buffer-substring blinkpos (1+ blinkpos)))
(buffer-substring blinkpos (1+ blinkpos))))))))
(cond (mismatch
(message "Mismatched parentheses"))
((not blink-matching-paren-distance)
(message "Unmatched parenthesis"))))))))
(setq blink-paren-function 'blink-matching-open)
(defun keyboard-quit ()
"Signal a `quit' condition.
During execution of Lisp code, this character causes a quit directly.
At top-level, as an editor command, this simply beeps."
(interactive)
(deactivate-mark)
(signal 'quit nil))
(define-key global-map "\C-g" 'keyboard-quit)
(defvar buffer-quit-function nil
"Function to call to \"quit\" the current buffer, or nil if none.
\\[keyboard-escape-quit] calls this function when its more local actions
\(such as cancelling a prefix argument, minibuffer or region) do not apply.")
(defun keyboard-escape-quit ()
"Exit the current \"mode\" (in a generalized sense of the word).
This command can exit an interactive command such as `query-replace',
can clear out a prefix argument or a region,
can get out of the minibuffer or other recursive edit,
cancel the use of the current buffer (for special-purpose buffers),
or go back to just one window (by deleting all but the selected window)."
(interactive)
(cond ((eq last-command 'mode-exited) nil)
((> (minibuffer-depth) 0)
(abort-recursive-edit))
(current-prefix-arg
nil)
((and transient-mark-mode
mark-active)
(deactivate-mark))
((> (recursion-depth) 0)
(exit-recursive-edit))
(buffer-quit-function
(funcall buffer-quit-function))
((not (one-window-p t))
(delete-other-windows))
((string-match "^ \\*" (buffer-name (current-buffer)))
(bury-buffer))))
(define-key global-map "\e\e\e" 'keyboard-escape-quit)
(defcustom mail-user-agent 'sendmail-user-agent
"*Your preference for a mail composition package.
Various Emacs Lisp packages (e.g. reporter) require you to compose an
outgoing email message. This variable lets you specify which
mail-sending package you prefer.
Valid values include:
sendmail-user-agent -- use the default Emacs Mail package
mh-e-user-agent -- use the Emacs interface to the MH mail system
message-user-agent -- use the GNUS mail sending package
Additional valid symbols may be available; check with the author of
your package for details."
:type '(radio (function-item :tag "Default Emacs mail"
:format "%t\n"
sendmail-user-agent)
(function-item :tag "Emacs interface to MH"
:format "%t\n"
mh-e-user-agent)
(function-item :tag "Gnus mail sending package"
:format "%t\n"
message-user-agent)
(function :tag "Other"))
:group 'mail)
(defun define-mail-user-agent (symbol composefunc sendfunc
&optional abortfunc hookvar)
"Define a symbol to identify a mail-sending package for `mail-user-agent'.
SYMBOL can be any Lisp symbol. Its function definition and/or
value as a variable do not matter for this usage; we use only certain
properties on its property list, to encode the rest of the arguments.
COMPOSEFUNC is program callable function that composes an outgoing
mail message buffer. This function should set up the basics of the
buffer without requiring user interaction. It should populate the
standard mail headers, leaving the `to:' and `subject:' headers blank
by default.
COMPOSEFUNC should accept several optional arguments--the same
arguments that `compose-mail' takes. See that function's documentation.
SENDFUNC is the command a user would run to send the message.
Optional ABORTFUNC is the command a user would run to abort the
message. For mail packages that don't have a separate abort function,
this can be `kill-buffer' (the equivalent of omitting this argument).
Optional HOOKVAR is a hook variable that gets run before the message
is actually sent. Callers that use the `mail-user-agent' may
install a hook function temporarily on this hook variable.
If HOOKVAR is nil, `mail-send-hook' is used.
The properties used on SYMBOL are `composefunc', `sendfunc',
`abortfunc', and `hookvar'."
(put symbol 'composefunc composefunc)
(put symbol 'sendfunc sendfunc)
(put symbol 'abortfunc (or abortfunc 'kill-buffer))
(put symbol 'hookvar (or hookvar 'mail-send-hook)))
(defun assoc-ignore-case (key alist)
"Like `assoc', but ignores differences in case and text representation.
KEY must be a string. Upper-case and lower-case letters are treated as equal.
Unibyte strings are converted to multibyte for comparison."
(let (element)
(while (and alist (not element))
(if (eq t (compare-strings key 0 nil (car (car alist)) 0 nil t))
(setq element (car alist)))
(setq alist (cdr alist)))
element))
(defun assoc-ignore-representation (key alist)
"Like `assoc', but ignores differences in text representation.
KEY must be a string.
Unibyte strings are converted to multibyte for comparison."
(let (element)
(while (and alist (not element))
(if (eq t (compare-strings key 0 nil (car (car alist)) 0 nil))
(setq element (car alist)))
(setq alist (cdr alist)))
element))
(define-mail-user-agent 'sendmail-user-agent
'sendmail-user-agent-compose
'mail-send-and-exit)
(defun rfc822-goto-eoh ()
(goto-char (point-min))
(while (looking-at "^[^: \n]+:\\|^[ \t]")
(forward-line 1))
(point))
(defun sendmail-user-agent-compose (&optional to subject other-headers continue
switch-function yank-action
send-actions)
(if switch-function
(let ((special-display-buffer-names nil)
(special-display-regexps nil)
(same-window-buffer-names nil)
(same-window-regexps nil))
(funcall switch-function "*mail*")))
(let ((cc (cdr (assoc-ignore-case "cc" other-headers)))
(in-reply-to (cdr (assoc-ignore-case "in-reply-to" other-headers))))
(or (mail continue to subject in-reply-to cc yank-action send-actions)
continue
(error "Message aborted"))
(save-excursion
(rfc822-goto-eoh)
(while other-headers
(if (not (assoc-ignore-case (car (car other-headers))
'(("in-reply-to") ("cc"))))
(insert (car (car other-headers)) ": "
(cdr (car other-headers)) "\n"))
(setq other-headers (cdr other-headers)))
t)))
(define-mail-user-agent 'mh-e-user-agent
'mh-smail-batch 'mh-send-letter 'mh-fully-kill-draft
'mh-before-send-letter-hook)
(defun compose-mail (&optional to subject other-headers continue
switch-function yank-action send-actions)
"Start composing a mail message to send.
This uses the user's chosen mail composition package
as selected with the variable `mail-user-agent'.
The optional arguments TO and SUBJECT specify recipients
and the initial Subject field, respectively.
OTHER-HEADERS is an alist specifying additional
header fields. Elements look like (HEADER . VALUE) where both
HEADER and VALUE are strings.
CONTINUE, if non-nil, says to continue editing a message already
being composed.
SWITCH-FUNCTION, if non-nil, is a function to use to
switch to and display the buffer used for mail composition.
YANK-ACTION, if non-nil, is an action to perform, if and when necessary,
to insert the raw text of the message being replied to.
It has the form (FUNCTION . ARGS). The user agent will apply
FUNCTION to ARGS, to insert the raw text of the original message.
\(The user agent will also run `mail-citation-hook', *after* the
original text has been inserted in this way.)
SEND-ACTIONS is a list of actions to call when the message is sent.
Each action has the form (FUNCTION . ARGS)."
(interactive
(list nil nil nil current-prefix-arg))
(let ((function (get mail-user-agent 'composefunc)))
(funcall function to subject other-headers continue
switch-function yank-action send-actions)))
(defun compose-mail-other-window (&optional to subject other-headers continue
yank-action send-actions)
"Like \\[compose-mail], but edit the outgoing message in another window."
(interactive
(list nil nil nil current-prefix-arg))
(compose-mail to subject other-headers continue
'switch-to-buffer-other-window yank-action send-actions))
(defun compose-mail-other-frame (&optional to subject other-headers continue
yank-action send-actions)
"Like \\[compose-mail], but edit the outgoing message in another frame."
(interactive
(list nil nil nil current-prefix-arg))
(compose-mail to subject other-headers continue
'switch-to-buffer-other-frame yank-action send-actions))
(defvar set-variable-value-history nil
"History of values entered with `set-variable'.")
(defun set-variable (var val)
"Set VARIABLE to VALUE. VALUE is a Lisp object.
When using this interactively, enter a Lisp object for VALUE.
If you want VALUE to be a string, you must surround it with doublequotes.
VALUE is used literally, not evaluated.
If VARIABLE has a `variable-interactive' property, that is used as if
it were the arg to `interactive' (which see) to interactively read VALUE.
If VARIABLE has been defined with `defcustom', then the type information
in the definition is used to check that VALUE is valid."
(interactive
(let* ((default-var (variable-at-point))
(var (if (symbolp default-var)
(read-variable (format "Set variable (default %s): " default-var)
default-var)
(read-variable "Set variable: ")))
(minibuffer-help-form '(describe-variable var))
(prop (get var 'variable-interactive))
(prompt (format "Set %s to value: " var))
(val (if prop
(call-interactively `(lambda (arg)
(interactive ,prop)
arg))
(read
(read-string prompt nil
'set-variable-value-history)))))
(list var val)))
(let ((type (get var 'custom-type)))
(when type
(require 'wid-edit)
(setq type (widget-convert type))
(unless (widget-apply type :match val)
(error "Value `%S' does not match type %S of %S"
val (car type) var))))
(set var val))
(defvar completion-list-mode-map nil
"Local map for completion list buffers.")
(or completion-list-mode-map
(let ((map (make-sparse-keymap)))
(define-key map [mouse-2] 'mouse-choose-completion)
(define-key map [down-mouse-2] nil)
(define-key map "\C-m" 'choose-completion)
(define-key map "\e\e\e" 'delete-completion-window)
(define-key map [left] 'previous-completion)
(define-key map [right] 'next-completion)
(setq completion-list-mode-map map)))
(put 'completion-list-mode 'mode-class 'special)
(defvar completion-reference-buffer nil
"Record the buffer that was current when the completion list was requested.
This is a local variable in the completion list buffer.
Initial value is nil to avoid some compiler warnings.")
(defvar completion-no-auto-exit nil
"Non-nil means `choose-completion-string' should never exit the minibuffer.
This also applies to other functions such as `choose-completion'
and `mouse-choose-completion'.")
(defvar completion-base-size nil
"Number of chars at beginning of minibuffer not involved in completion.
This is a local variable in the completion list buffer
but it talks about the buffer in `completion-reference-buffer'.
If this is nil, it means to compare text to determine which part
of the tail end of the buffer's text is involved in completion.")
(defun delete-completion-window ()
"Delete the completion list window.
Go to the window from which completion was requested."
(interactive)
(let ((buf completion-reference-buffer))
(if (one-window-p t)
(if (window-dedicated-p (selected-window))
(delete-frame (selected-frame)))
(delete-window (selected-window))
(if (get-buffer-window buf)
(select-window (get-buffer-window buf))))))
(defun previous-completion (n)
"Move to the previous item in the completion list."
(interactive "p")
(next-completion (- n)))
(defun next-completion (n)
"Move to the next item in the completion list.
With prefix argument N, move N items (negative N means move backward)."
(interactive "p")
(while (and (> n 0) (not (eobp)))
(let ((prop (get-text-property (point) 'mouse-face))
(end (point-max)))
(if prop
(goto-char (next-single-property-change (point) 'mouse-face nil end)))
(goto-char (next-single-property-change (point) 'mouse-face nil end)))
(setq n (1- n)))
(while (and (< n 0) (not (bobp)))
(let ((prop (get-text-property (1- (point)) 'mouse-face))
(end (point-min)))
(if prop
(goto-char (previous-single-property-change
(point) 'mouse-face nil end)))
(goto-char (previous-single-property-change (point) 'mouse-face nil end))
(goto-char (previous-single-property-change (point) 'mouse-face nil end)))
(setq n (1+ n))))
(defun choose-completion ()
"Choose the completion that point is in or next to."
(interactive)
(let (beg end completion (buffer completion-reference-buffer)
(base-size completion-base-size))
(if (and (not (eobp)) (get-text-property (point) 'mouse-face))
(setq end (point) beg (1+ (point))))
(if (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face))
(setq end (1- (point)) beg (point)))
(if (null beg)
(error "No completion here"))
(setq beg (previous-single-property-change beg 'mouse-face))
(setq end (or (next-single-property-change end 'mouse-face) (point-max)))
(setq completion (buffer-substring beg end))
(let ((owindow (selected-window)))
(if (and (one-window-p t 'selected-frame)
(window-dedicated-p (selected-window)))
(iconify-frame (selected-frame))
(or (window-dedicated-p (selected-window))
(bury-buffer)))
(select-window owindow))
(choose-completion-string completion buffer base-size)))
(defun choose-completion-delete-max-match (string)
(let ((opoint (point))
(len (min (length string)
(- (point) (point-min)))))
(goto-char (- (point) (length string)))
(if completion-ignore-case
(setq string (downcase string)))
(while (and (> len 0)
(let ((tail (buffer-substring (point)
(+ (point) len))))
(if completion-ignore-case
(setq tail (downcase tail)))
(not (string= tail (substring string 0 len)))))
(setq len (1- len))
(forward-char 1))
(delete-char len)))
(defun choose-completion-string (choice &optional buffer base-size)
(let ((buffer (or buffer completion-reference-buffer)))
(if (and (string-match "\\` \\*Minibuf-[0-9]+\\*\\'" (buffer-name buffer))
(or (not (active-minibuffer-window))
(not (equal buffer
(window-buffer (active-minibuffer-window))))))
(error "Minibuffer is not active for completion")
(set-buffer buffer)
(if base-size
(delete-region (+ base-size (point-min)) (point))
(choose-completion-delete-max-match choice))
(insert choice)
(remove-text-properties (- (point) (length choice)) (point)
'(mouse-face nil))
(let ((window (get-buffer-window buffer t)))
(set-window-point window (point)))
(and (not completion-no-auto-exit)
(equal buffer (window-buffer (minibuffer-window)))
minibuffer-completion-table
(if (and (eq minibuffer-completion-table 'read-file-name-internal)
(file-directory-p (buffer-string)))
(select-window (active-minibuffer-window))
(exit-minibuffer))))))
(defun completion-list-mode ()
"Major mode for buffers showing lists of possible completions.
Type \\<completion-list-mode-map>\\[choose-completion] in the completion list\
to select the completion near point.
Use \\<completion-list-mode-map>\\[mouse-choose-completion] to select one\
with the mouse."
(interactive)
(kill-all-local-variables)
(use-local-map completion-list-mode-map)
(setq mode-name "Completion List")
(setq major-mode 'completion-list-mode)
(make-local-variable 'completion-base-size)
(setq completion-base-size nil)
(run-hooks 'completion-list-mode-hook))
(defvar completion-setup-hook nil
"Normal hook run at the end of setting up a completion list buffer.
When this hook is run, the current buffer is the one in which the
command to display the completion list buffer was run.
The completion list buffer is available as the value of `standard-output'.")
(defun completion-setup-function ()
(save-excursion
(let ((mainbuf (current-buffer)))
(set-buffer standard-output)
(completion-list-mode)
(make-local-variable 'completion-reference-buffer)
(setq completion-reference-buffer mainbuf)
(if (eq minibuffer-completion-table 'read-file-name-internal)
(setq completion-base-size
(save-excursion
(set-buffer mainbuf)
(goto-char (point-max))
(skip-chars-backward (format "^%c" directory-sep-char))
(- (point) (point-min))))
(save-match-data
(if (string-match "\\` \\*Minibuf-[0-9]+\\*\\'"
(buffer-name mainbuf))
(setq completion-base-size 0))))
(goto-char (point-min))
(if window-system
(insert (substitute-command-keys
"Click \\[mouse-choose-completion] on a completion to select it.\n")))
(insert (substitute-command-keys
"In this buffer, type \\[choose-completion] to \
select the completion near point.\n\n")))))
(add-hook 'completion-setup-hook 'completion-setup-function)
(define-key minibuffer-local-completion-map [prior]
'switch-to-completions)
(define-key minibuffer-local-must-match-map [prior]
'switch-to-completions)
(define-key minibuffer-local-completion-map "\M-v"
'switch-to-completions)
(define-key minibuffer-local-must-match-map "\M-v"
'switch-to-completions)
(defun switch-to-completions ()
"Select the completion list window."
(interactive)
(or (get-buffer-window "*Completions*")
(minibuffer-completion-help))
(let ((window (get-buffer-window "*Completions*")))
(when window
(select-window window)
(goto-char (point-min))
(search-forward "\n\n")
(forward-line 1))))
(defun event-apply-alt-modifier (ignore-prompt)
"Add the Alt modifier to the following event.
For example, type \\[event-apply-alt-modifier] & to enter Alt-&."
(vector (event-apply-modifier (read-event) 'alt 22 "A-")))
(defun event-apply-super-modifier (ignore-prompt)
"Add the Super modifier to the following event.
For example, type \\[event-apply-super-modifier] & to enter Super-&."
(vector (event-apply-modifier (read-event) 'super 23 "s-")))
(defun event-apply-hyper-modifier (ignore-prompt)
"Add the Hyper modifier to the following event.
For example, type \\[event-apply-hyper-modifier] & to enter Hyper-&."
(vector (event-apply-modifier (read-event) 'hyper 24 "H-")))
(defun event-apply-shift-modifier (ignore-prompt)
"Add the Shift modifier to the following event.
For example, type \\[event-apply-shift-modifier] & to enter Shift-&."
(vector (event-apply-modifier (read-event) 'shift 25 "S-")))
(defun event-apply-control-modifier (ignore-prompt)
"Add the Ctrl modifier to the following event.
For example, type \\[event-apply-control-modifier] & to enter Ctrl-&."
(vector (event-apply-modifier (read-event) 'control 26 "C-")))
(defun event-apply-meta-modifier (ignore-prompt)
"Add the Meta modifier to the following event.
For example, type \\[event-apply-meta-modifier] & to enter Meta-&."
(vector (event-apply-modifier (read-event) 'meta 27 "M-")))
(defun event-apply-modifier (event symbol lshiftby prefix)
"Apply a modifier flag to event EVENT.
SYMBOL is the name of this modifier, as a symbol.
LSHIFTBY is the numeric value of this modifier, in keyboard events.
PREFIX is the string that represents this modifier in an event type symbol."
(if (numberp event)
(cond ((eq symbol 'control)
(if (and (<= (downcase event) ?z)
(>= (downcase event) ?a))
(- (downcase event) ?a -1)
(if (and (<= (downcase event) ?Z)
(>= (downcase event) ?A))
(- (downcase event) ?A -1)
(logior (lsh 1 lshiftby) event))))
((eq symbol 'shift)
(if (and (<= (downcase event) ?z)
(>= (downcase event) ?a))
(upcase event)
(logior (lsh 1 lshiftby) event)))
(t
(logior (lsh 1 lshiftby) event)))
(if (memq symbol (event-modifiers event))
event
(let ((event-type (if (symbolp event) event (car event))))
(setq event-type (intern (concat prefix (symbol-name event-type))))
(if (symbolp event)
event-type
(cons event-type (cdr event)))))))
(define-key function-key-map [?\C-x ?@ ?h] 'event-apply-hyper-modifier)
(define-key function-key-map [?\C-x ?@ ?s] 'event-apply-super-modifier)
(define-key function-key-map [?\C-x ?@ ?m] 'event-apply-meta-modifier)
(define-key function-key-map [?\C-x ?@ ?a] 'event-apply-alt-modifier)
(define-key function-key-map [?\C-x ?@ ?S] 'event-apply-shift-modifier)
(define-key function-key-map [?\C-x ?@ ?c] 'event-apply-control-modifier)
(mapcar
(lambda (keypad-normal)
(let ((keypad (nth 0 keypad-normal))
(normal (nth 1 keypad-normal)))
(put keypad 'ascii-character normal)
(define-key function-key-map (vector keypad) (vector normal))))
'((kp-0 ?0) (kp-1 ?1) (kp-2 ?2) (kp-3 ?3) (kp-4 ?4)
(kp-5 ?5) (kp-6 ?6) (kp-7 ?7) (kp-8 ?8) (kp-9 ?9)
(kp-space ?\ )
(kp-tab ?\t)
(kp-enter ?\r)
(kp-multiply ?*)
(kp-add ?+)
(kp-separator ?,)
(kp-subtract ?-)
(kp-decimal ?.)
(kp-divide ?/)
(kp-equal ?=)))