(defalias 'indent-for-comment 'comment-indent)
(defalias 'set-comment-column 'comment-set-column)
(defalias 'kill-comment 'comment-kill)
(defalias 'indent-new-comment-line 'comment-indent-new-line)
(defgroup comment nil
"Indenting and filling of comments."
:prefix "comment-"
:version "21.1"
:group 'fill)
(defvar comment-use-syntax 'undecided
"Non-nil if syntax-tables can be used instead of regexps.
Can also be `undecided' which means that a somewhat expensive test will
be used to try to determine whether syntax-tables should be trusted
to understand comments or not in the given buffer.
Major modes should set this variable.")
(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 'comment)
(make-variable-buffer-local 'comment-column)
(defvar comment-start nil
"*String to insert to start a new comment, or nil if no comment syntax.")
(defvar 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.")
(defvar comment-end-skip nil
"Regexp to match the end of a comment plus everything up to its body.")
(defvar comment-end ""
"*String to insert to end a new comment.
Should be an empty string if comments are terminated by end-of-line.")
(defvar comment-indent-function 'comment-indent-default
"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 and should return either the desired
column indentation or nil.
If nil is returned, indentation is delegated to `indent-according-to-mode'.")
(defvar block-comment-start nil)
(defvar block-comment-end nil)
(defvar comment-quote-nested t
"Non-nil if nested comments should be quoted.
This should be locally set by each major mode if needed.")
(defvar comment-continue nil
"Continuation string to insert for multiline comments.
This string will be added at the beginning of each line except the very
first one when commenting a region with a commenting style that allows
comments to span several lines.
It should generally have the same length as `comment-start' in order to
preserve indentation.
If it is nil a value will be automatically derived from `comment-start'
by replacing its first character with a space.")
(defvar comment-add 0
"How many more comment chars should be inserted by `comment-region'.
This determines the default value of the numeric argument of `comment-region'.
This should generally stay 0, except for a few modes like Lisp where
it can be convenient to set it to 1 so that regions are commented with
two semi-colons.")
(defconst comment-styles
'((plain . (nil nil nil nil))
(indent . (nil nil nil t))
(aligned . (nil t nil t))
(multi-line . (t nil nil t))
(extra-line . (t nil t t))
(box . (nil t t t))
(box-multi . (t t t t)))
"Possible comment styles of the form (STYLE . (MULTI ALIGN EXTRA INDENT)).
STYLE should be a mnemonic symbol.
MULTI specifies that comments are allowed to span multiple lines.
ALIGN specifies that the `comment-end' markers should be aligned.
EXTRA specifies that an extra line should be used before and after the
region to comment (to put the `comment-end' and `comment-start').
INDENT specifies that the `comment-start' markers should not be put at the
left margin but at the current indentation of the region to comment.")
(defcustom comment-style 'plain
"*Style to be used for `comment-region'.
See `comment-styles' for a list of available styles."
:group 'comment
:type (if (boundp 'comment-styles)
`(choice ,@(mapcar (lambda (s) `(const ,(car s))) comment-styles))
'symbol))
(defcustom comment-padding " "
"Padding string that `comment-region' puts between comment chars and text.
Can also be an integer which will be automatically turned into a string
of the corresponding number of spaces.
Extra spacing between the comment characters and the comment text
makes the comment easier to read. Default is 1. nil means 0.")
(defcustom comment-multi-line nil
"*Non-nil means \\[comment-indent-new-line] continues comments, with no new terminator or starter.
This is obsolete because you might as well use \\[newline-and-indent]."
:type 'boolean
:group 'comment)
(defun comment-string-strip (str beforep afterp)
"Strip STR of any leading (if BEFOREP) and/or trailing (if AFTERP) space."
(string-match (concat "\\`" (if beforep "\\s-*")
"\\(.*?\\)" (if afterp "\\s-*\n?")
"\\'") str)
(match-string 1 str))
(defun comment-string-reverse (s)
"Return the mirror image of string S, without any trailing space."
(comment-string-strip (concat (nreverse (string-to-list s))) nil t))
(defun comment-normalize-vars (&optional noerror)
(if (not comment-start) (or noerror (error "No comment syntax is defined"))
(when (eq comment-use-syntax 'undecided)
(set (make-local-variable 'comment-use-syntax)
(let ((st (syntax-table))
(cs comment-start)
(ce (if (string= "" comment-end) "\n" comment-end)))
(with-temp-buffer
(set-syntax-table st)
(insert cs " hello " ce)
(goto-char (point-min))
(and (forward-comment 1) (eobp))))))
(when (integerp comment-padding)
(setq comment-padding (make-string comment-padding ? )))
(unless (or comment-continue (string= comment-end ""))
(set (make-local-variable 'comment-continue)
(concat (if (string-match "\\S-\\S-" comment-start) " " "|")
(substring comment-start 1))))
(unless comment-start-skip
(set (make-local-variable 'comment-start-skip)
(concat "\\(\\(^\\|[^\\\\\n]\\)\\(\\\\\\\\\\)*\\)\\(\\s<+\\|"
(regexp-quote (comment-string-strip comment-start t t))
"+\\)[ \t]*")))
(unless comment-end-skip
(let ((ce (if (string= "" comment-end) "\n"
(comment-string-strip comment-end t t))))
(set (make-local-variable 'comment-end-skip)
(concat "[ \t]*\\(\\s>" (if comment-quote-nested "" "+")
"\\|" (regexp-quote (substring ce 0 1))
(if (and comment-quote-nested (<= (length ce) 1)) "" "+")
(regexp-quote (substring ce 1))
"\\)"))))))
(defun comment-quote-re (str unp)
(concat (regexp-quote (substring str 0 1))
"\\\\" (if unp "+" "*")
(regexp-quote (substring str 1))))
(defun comment-quote-nested (cs ce unp)
"Quote or unquote nested comments.
If UNP is non-nil, unquote nested comment markers."
(setq cs (comment-string-strip cs t t))
(setq ce (comment-string-strip ce t t))
(when (and comment-quote-nested (> (length ce) 0))
(let ((re (concat (comment-quote-re ce unp)
"\\|" (comment-quote-re cs unp))))
(goto-char (point-min))
(while (re-search-forward re nil t)
(goto-char (match-beginning 0))
(forward-char 1)
(if unp (delete-char 1) (insert "\\"))
(when (= (length ce) 1)
(if (not unp)
(when (string= (match-string 0) ce)
(replace-match (concat "!" cs) t t))
(when (and (< (point-min) (match-beginning 0))
(string= (buffer-substring (1- (match-beginning 0))
(1- (match-end 0)))
(concat "!" cs)))
(backward-char 2)
(delete-char (- (match-end 0) (match-beginning 0)))
(insert ce))))))))
(defun comment-search-forward (limit &optional noerror)
"Find a comment start between point and LIMIT.
Moves point to inside the comment and returns the position of the
comment-starter. If no comment is found, moves point to LIMIT
and raises an error or returns nil of NOERROR is non-nil."
(if (not comment-use-syntax)
(if (re-search-forward comment-start-skip limit noerror)
(or (match-end 1) (match-beginning 0))
(goto-char limit)
(unless noerror (error "No comment")))
(let* ((pt (point))
(s (parse-partial-sexp pt (or limit (point-max)) nil nil nil t)))
(when (and (nth 8 s) (nth 3 s))
(setq s (parse-partial-sexp
pt (or limit (point-max)) nil nil
(list nil nil nil (nth 3 s) nil nil nil nil)
t)))
(if (not (and (nth 8 s) (not (nth 3 s))))
(unless noerror (error "No comment"))
(let ((pos (point))
(start (nth 8 s))
(bol (line-beginning-position))
(end nil))
(while (and (null end) (>= (point) bol))
(if (looking-at comment-start-skip)
(setq end (min (or limit (point-max)) (match-end 0)))
(backward-char)))
(goto-char (or end pos))
start)))))
(defun comment-search-backward (&optional limit noerror)
"Find a comment start between LIMIT and point.
Moves point to inside the comment and returns the position of the
comment-starter. If no comment is found, moves point to LIMIT
and raises an error or returns nil of NOERROR is non-nil."
(if (not (re-search-backward comment-start-skip limit t))
(unless noerror (error "No comment"))
(beginning-of-line)
(let* ((end (match-end 0))
(cs (comment-search-forward end t))
(pt (point)))
(if (not cs)
(progn (beginning-of-line)
(comment-search-backward limit noerror))
(while (progn (goto-char cs)
(comment-forward)
(and (< (point) end)
(setq cs (comment-search-forward end t))))
(setq pt (point)))
(goto-char pt)
cs))))
(defun comment-beginning ()
"Find the beginning of the enclosing comment.
Returns nil if not inside a comment, else moves point and returns
the same as `comment-search-forward'."
(unless (eq (get-text-property (point) 'face) 'font-lock-string-face)
(let ((pt (point))
(cs (comment-search-backward nil t)))
(when cs
(if (save-excursion
(goto-char cs)
(and
(or (not (looking-at comment-end-skip))
(eq (get-text-property (match-end 0) 'face)
'font-lock-comment-face)
(unless (eq (get-text-property (point) 'face)
'font-lock-comment-face)
(>= (line-end-position) pt)))
(if (comment-forward 1) (> (point) pt) (eobp))))
cs
(goto-char pt)
nil)))))
(defun comment-forward (&optional n)
"Skip forward over N comments.
Just like `forward-comment' but only for positive N
and can use regexps instead of syntax."
(setq n (or n 1))
(if (< n 0) (error "No comment-backward")
(if comment-use-syntax (forward-comment n)
(while (> n 0)
(skip-syntax-forward " ")
(setq n
(if (and (looking-at comment-start-skip)
(goto-char (match-end 0))
(re-search-forward comment-end-skip nil 'move))
(1- n) -1)))
(= n 0))))
(defun comment-enter-backward ()
"Move from the end of a comment to the end of its content.
Point is assumed to be just at the end of a comment."
(if (bolp)
(progn (backward-char) (skip-syntax-backward " "))
(let ((end (point)))
(beginning-of-line)
(save-restriction
(narrow-to-region (point) end)
(if (re-search-forward (concat comment-end-skip "\\'") nil t)
(goto-char (match-beginning 0))
(goto-char (point-max))
(backward-char 2)
(skip-chars-backward (string (char-after)))
(skip-syntax-backward " "))))))
(defun comment-indent-default ()
"Default for `comment-indent-function'."
(if (and (looking-at "\\s<\\s<\\(\\s<\\)?")
(or (match-end 1) (/= (current-column) (current-indentation))))
0
(when (or (/= (current-column) (current-indentation))
(and (> comment-add 0) (looking-at "\\s<\\S<")))
comment-column)))
(defun comment-indent (&optional continue)
"Indent this line's comment to comment column, or insert an empty comment.
If CONTINUE is non-nil, use the `comment-continue' markers if any."
(interactive "*")
(comment-normalize-vars)
(let* ((empty (save-excursion (beginning-of-line)
(looking-at "[ \t]*$")))
(starter (or (and continue comment-continue)
(and empty block-comment-start) comment-start))
(ender (or (and continue comment-continue "")
(and empty block-comment-end) comment-end)))
(unless starter (error "No comment syntax defined"))
(beginning-of-line)
(let* ((eolpos (line-end-position))
(begpos (comment-search-forward eolpos t))
cpos indent)
(if begpos (setq cpos (point-marker))
(save-excursion
(indent-to comment-column)
(setq begpos (point))
(insert starter)
(setq cpos (point-marker))
(insert ender)))
(goto-char begpos)
(setq indent (save-excursion (funcall comment-indent-function)))
(if (not indent)
(indent-according-to-mode)
(setq indent
(min indent
(+ (current-column)
(- fill-column
(save-excursion (end-of-line) (current-column))))))
(if (= (current-column) indent)
(goto-char begpos)
(skip-chars-backward " \t")
(delete-region (point) begpos)
(indent-to (if (bolp) indent
(max indent (1+ (current-column)))))))
(goto-char cpos)
(set-marker cpos nil))))
(defun comment-set-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")
(cond
((eq arg '-) (comment-kill nil))
(arg
(save-excursion
(beginning-of-line)
(comment-search-backward)
(beginning-of-line)
(goto-char (comment-search-forward (line-end-position)))
(setq comment-column (current-column))
(message "Comment column set to %d" comment-column))
(comment-indent))
(t (setq comment-column (current-column))
(message "Comment column set to %d" comment-column))))
(defun comment-kill (arg)
"Kill the comment on this line, if any.
With prefix ARG, kill comments on that many lines starting with this one."
(interactive "P")
(dotimes (_ (prefix-numeric-value arg))
(save-excursion
(beginning-of-line)
(let ((cs (comment-search-forward (line-end-position) t)))
(when cs
(goto-char cs)
(skip-syntax-backward " ")
(setq cs (point))
(comment-forward)
(kill-region cs (if (bolp) (1- (point)) (point)))
(indent-according-to-mode))))
(if arg (forward-line 1))))
(defun comment-padright (str &optional n)
"Construct a string composed of STR plus `comment-padding'.
It also adds N copies of the last non-whitespace chars of STR.
If STR already contains padding, the corresponding amount is
ignored from `comment-padding'.
N defaults to 0.
If N is `re', a regexp is returned instead, that would match
the string for any N."
(setq n (or n 0))
(when (and (stringp str) (not (string= "" str)))
(string-match "\\`\\s-*\\(.*?\\)\\s-*\\'" str)
(let ((s (match-string 1 str)) (lpad (substring str 0 (match-beginning 1))) (rpad (concat (substring str (match-end 1)) (substring comment-padding (min (- (match-end 0) (match-end 1))
(length comment-padding)))))
(multi (not (and comment-quote-nested
(string-match "\\`\\s-*\\S-\\s-*\\'" comment-end)))))
(if (not (symbolp n))
(concat lpad s (when multi (make-string n (aref str (1- (match-end 1))))) rpad)
(concat (mapconcat (lambda (c) (concat (regexp-quote (string c)) "?"))
lpad "") (regexp-quote s)
(when multi "+") (mapconcat (lambda (c) (concat (regexp-quote (string c)) "?"))
rpad ""))))))
(defun comment-padleft (str &optional n)
"Construct a string composed of `comment-padding' plus STR.
It also adds N copies of the first non-whitespace chars of STR.
If STR already contains padding, the corresponding amount is
ignored from `comment-padding'.
N defaults to 0.
If N is `re', a regexp is returned instead, that would match
the string for any N."
(setq n (or n 0))
(when (and (stringp str) (not (string= "" str)))
(string-match "\\`\\s-*" str)
(let ((s (substring str (match-end 0)))
(pad (concat (substring comment-padding
(min (- (match-end 0) (match-beginning 0))
(length comment-padding)))
(match-string 0 str)))
(c (aref str (match-end 0))) (multi (not (and comment-quote-nested
(string-match "\\`\\s-*\\S-\\s-*\\'" comment-end)))))
(if (not (symbolp n))
(concat pad (when multi (make-string n c)) s)
(concat "\\s-*"
(if multi (concat (regexp-quote (string c)) "*"))
(regexp-quote s))))))
(defun uncomment-region (beg end &optional arg)
"Uncomment each line in the BEG..END region.
The numeric prefix ARG can specify a number of chars to remove from the
comment markers."
(interactive "*r\nP")
(comment-normalize-vars)
(if (> beg end) (let (mid) (setq mid beg beg end end mid)))
(save-excursion
(goto-char beg)
(setq end (copy-marker end))
(let ((numarg (prefix-numeric-value arg))
spt)
(while (and (< (point) end)
(setq spt (comment-search-forward end t)))
(let* ((ipt (point))
(ept (progn
(goto-char spt)
(unless (comment-forward)
(error "Can't find the comment end"))
(point)))
(box nil)
(ccs comment-continue)
(srei (comment-padright ccs 're))
(sre (and srei (concat "^\\s-*?\\(" srei "\\)"))))
(save-restriction
(narrow-to-region spt ept)
(goto-char ipt)
(skip-syntax-backward " ")
(when (and (= (- (point) (point-min)) 1) (looking-at "=\\{7\\}"))
(skip-chars-forward "="))
(when (> (- (point) (point-min) (length comment-start)) 7)
(setq box t))
(when (looking-at (regexp-quote comment-padding))
(goto-char (match-end 0)))
(when (and sre (looking-at (concat "\\s-*\n\\s-*" srei)))
(goto-char (match-end 0)))
(if (null arg) (delete-region (point-min) (point))
(skip-syntax-backward " ")
(delete-char (- numarg)))
(goto-char (point-max)) (comment-enter-backward)
(when (= (- (point-max) (point)) 1)
(let ((pos (point)))
(when (> (skip-chars-backward "=") -7) (goto-char pos))))
(unless (looking-at "\\(\n\\|\\s-\\)*\\'")
(when (and (bolp) (not (bobp))) (backward-char))
(if (null arg) (delete-region (point) (point-max))
(skip-syntax-forward " ")
(delete-char numarg)))
(comment-quote-nested comment-start comment-end t)
(when sre
(let* ((cce (comment-string-reverse (or comment-continue
comment-start)))
(erei (and box (comment-padleft cce 're)))
(ere (and erei (concat "\\(" erei "\\)\\s-*$"))))
(goto-char (point-min))
(while (progn
(if (and ere (re-search-forward
ere (line-end-position) t))
(replace-match "" t t nil (if (match-end 2) 2 1))
(setq ere nil))
(forward-line 1)
(re-search-forward sre (line-end-position) t))
(replace-match "" t t nil (if (match-end 2) 2 1)))))
(goto-char (point-max)))))
(set-marker end nil))))
(defun comment-make-extra-lines (cs ce ccs cce min-indent max-indent &optional block)
"Make the leading and trailing extra lines.
This is used for `extra-line' style (or `box' style if BLOCK is specified)."
(let ((eindent 0))
(if (not block)
(progn
(setq ce (comment-string-strip ce t t))
(when (string-match "\\(.+\\).*\n\\(.*?\\)\\1" (concat ce "\n" cs))
(setq eindent
(max (- (match-end 2) (match-beginning 2) (match-beginning 0))
0))))
(let* ((width (- max-indent min-indent))
(s (concat cs "a=m" cce))
(e (concat ccs "a=m" ce))
(c (if (string-match ".*\\S-\\S-" cs)
(aref cs (1- (match-end 0))) ?=))
(_ (string-match "\\s-*a=m\\s-*" s))
(fill
(make-string (+ width (- (match-end 0)
(match-beginning 0) (length cs) 3)) c)))
(setq cs (replace-match fill t t s))
(string-match "\\s-*a=m\\s-*" e)
(setq ce (replace-match fill t t e))))
(cons (concat cs "\n" (make-string min-indent ? ) ccs)
(concat cce "\n" (make-string (+ min-indent eindent) ? ) ce))))
(def-edebug-spec comment-with-narrowing t)
(put 'comment-with-narrowing 'lisp-indent-function 2)
(defmacro comment-with-narrowing (beg end &rest body)
"Execute BODY with BEG..END narrowing.
Space is added (and then removed) at the beginning for the text's
indentation to be kept as it was before narrowing."
(let ((bindent (make-symbol "bindent")))
`(let ((,bindent (save-excursion (goto-char beg) (current-column))))
(save-restriction
(narrow-to-region beg end)
(goto-char (point-min))
(insert (make-string ,bindent ? ))
(prog1
(progn ,@body)
(save-excursion
(goto-char (point-min))
(when (looking-at " *")
(let ((n (min (- (match-end 0) (match-beginning 0)) ,bindent)))
(delete-char n)
(setq ,bindent (- ,bindent n))))
(end-of-line)
(let ((e (point)))
(beginning-of-line)
(while (and (> ,bindent 0) (re-search-forward " *" e t))
(let ((n (min ,bindent (- (match-end 0) (match-beginning 0) 1))))
(goto-char (match-beginning 0))
(delete-char n)
(setq ,bindent (- ,bindent n)))))))))))
(defun comment-region-internal (beg end cs ce
&optional ccs cce block lines indent)
"Comment region BEG..END.
CS and CE are the comment start resp end string.
CCS and CCE are the comment continuation strings for the start resp end
of lines (default to CS and CE).
BLOCK indicates that end of lines should be marked with either CCE, CE or CS
\(if CE is empty) and that those markers should be aligned.
LINES indicates that an extra lines will be used at the beginning and end
of the region for CE and CS.
INDENT indicates to put CS and CCS at the current indentation of the region
rather than at left margin."
(let ((no-empty t))
(if (and (stringp ce) (string= "" ce)) (setq ce nil))
(if (and (stringp cce) (string= "" cce)) (setq cce nil))
(unless ce (setq ccs nil cce nil))
(if (or ccs block lines) (setq no-empty nil))
(when block (unless ce (setq ce (comment-string-reverse cs))))
(unless block (setq cce nil))
(unless ccs (setq ccs cs cce ce))
(save-excursion
(goto-char end)
(unless (or ce (eolp)) (insert "\n") (indent-according-to-mode))
(comment-with-narrowing beg end
(let ((min-indent (point-max))
(max-indent 0))
(goto-char (point-min))
(comment-quote-nested comment-start comment-end nil)
(goto-char (point-min))
(while
(progn
(unless (looking-at "[ \t]*$")
(setq min-indent (min min-indent (current-indentation))))
(end-of-line)
(setq max-indent (max max-indent (current-column)))
(not (or (eobp) (progn (forward-line) nil)))))
(setq max-indent
(+ max-indent (max (length cs) (length ccs)) tab-width -1))
(unless indent (setq min-indent 0))
(when lines
(let ((csce
(comment-make-extra-lines
cs ce ccs cce min-indent max-indent block)))
(setq cs (car csce))
(setq ce (cdr csce))))
(goto-char (point-min))
(while
(progn
(unless (and no-empty (looking-at "[ \t]*$"))
(move-to-column min-indent t)
(insert cs) (setq cs ccs) (end-of-line)
(if (eobp) (setq cce ce))
(when cce
(when block (move-to-column max-indent t))
(insert cce)))
(end-of-line)
(not (or (eobp) (progn (forward-line) nil))))))))))
(defun comment-region (beg end &optional arg)
"Comment or uncomment each line in the region.
With just \\[universal-argument] prefix arg, uncomment each line in region BEG..END.
Numeric prefix arg ARG means use ARG comment characters.
If ARG is negative, delete that many comment characters instead.
By default, comments start at the left margin, are terminated on each line,
even for syntax in which newline does not end the comment and blank lines
do not get comments. This can be changed with `comment-style'.
The strings used as comment starts are built from
`comment-start' without trailing spaces and `comment-padding'."
(interactive "*r\nP")
(comment-normalize-vars)
(if (> beg end) (let (mid) (setq mid beg beg end end mid)))
(let* ((numarg (prefix-numeric-value arg))
(add comment-add)
(style (cdr (assoc comment-style comment-styles)))
(lines (nth 2 style))
(block (nth 1 style))
(multi (nth 0 style)))
(save-excursion
(goto-char beg) (skip-chars-forward " \t\n\r") (beginning-of-line)
(setq beg (max beg (point)))
(goto-char end) (skip-chars-backward " \t\n\r") (end-of-line)
(setq end (min end (point)))
(if (>= beg end) (error "Nothing to comment"))
(setq lines
(and
lines (progn (goto-char beg) (beginning-of-line)
(skip-syntax-forward " ")
(>= (point) beg))
(progn (goto-char end) (end-of-line) (skip-syntax-backward " ")
(<= (point) end))
(or (not (string= "" comment-end)) block)
(progn (goto-char beg) (search-forward "\n" end t)))))
(unless (or lines (string= "" comment-end)) (setq block nil))
(cond
((consp arg) (uncomment-region beg end))
((< numarg 0) (uncomment-region beg end (- numarg)))
(t
(setq numarg (if (and (null arg) (= (length comment-start) 1))
add (1- numarg)))
(comment-region-internal
beg end
(let ((s (comment-padright comment-start numarg)))
(if (string-match comment-start-skip s) s
(comment-padright comment-start)))
(let ((s (comment-padleft comment-end numarg)))
(and s (if (string-match comment-end-skip s) s
(comment-padright comment-end))))
(if multi (comment-padright comment-continue numarg))
(if multi (comment-padleft (comment-string-reverse comment-continue) numarg))
block
lines
(nth 3 style))))))
(defun comment-box (beg end &optional arg)
"Comment out the BEG..END region, putting it inside a box.
The numeric prefix ARG specifies how many characters to add to begin- and
end- comment markers additionally to what `comment-add' already specifies."
(interactive "*r\np")
(let ((comment-style (if (cadr (assoc comment-style comment-styles))
'box-multi 'box)))
(comment-region beg end (+ comment-add arg))))
(defun comment-dwim (arg)
"Call the comment command you want (Do What I Mean).
If the region is active and `transient-mark-mode' is on, call
`comment-region' (unless it only consists of comments, in which
case it calls `uncomment-region').
Else, if the current line is empty, insert a comment and indent it.
Else if a prefix ARG is specified, call `comment-kill'.
Else, call `comment-indent'."
(interactive "*P")
(comment-normalize-vars)
(if (and mark-active transient-mark-mode)
(let ((beg (min (point) (mark)))
(end (max (point) (mark))))
(if (save-excursion (goto-char beg)
(comment-forward (point-max))
(<= end (point)))
(uncomment-region beg end arg)
(comment-region beg end arg)))
(if (save-excursion (beginning-of-line) (not (looking-at "\\s-*$")))
(if arg (comment-kill (and (integerp arg) arg)) (comment-indent))
(let ((add (if arg (prefix-numeric-value arg)
(if (= (length comment-start) 1) comment-add 0))))
(indent-according-to-mode)
(insert (comment-padright comment-start add))
(save-excursion
(unless (string= "" comment-end)
(insert (comment-padleft comment-end add)))
(indent-according-to-mode))))))
(defcustom comment-auto-fill-only-comments nil
"Non-nil means to only auto-fill inside comments.
This has no effect in modes that do not define a comment syntax."
:type 'boolean
:group 'comment)
(defun comment-indent-new-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 variable `use-hard-newlines' is true,
unless optional argument SOFT is non-nil."
(interactive)
(comment-normalize-vars t)
(let (compos comin)
(unless (and comment-start
comment-auto-fill-only-comments
(not (save-excursion
(prog1 (setq compos (comment-beginning))
(setq comin (point))))))
(delete-horizontal-space)
(if soft (insert-and-inherit ?\n) (newline 1))
(if fill-prefix
(progn
(indent-to-left-margin)
(insert-and-inherit fill-prefix))
(unless (or comment-multi-line compos (null comment-start))
(save-excursion
(backward-char)
(setq compos (comment-beginning))
(setq comin (point))))
(if (not compos) (indent-according-to-mode)
(let* ((comment-column
(save-excursion
(goto-char compos)
(min (current-column) (max comment-column
(+ 2 (current-indentation))))))
(comstart (buffer-substring compos comin))
(normalp
(string-match (regexp-quote (comment-string-strip
comment-start t t))
comstart))
(comment-end
(if normalp comment-end
(save-excursion
(goto-char compos)
(if (not (comment-forward)) comment-end
(comment-string-strip
(buffer-substring
(save-excursion (comment-enter-backward) (point))
(point))
nil t)))))
(comment-start comstart)
(comment-continue nil))
(insert-and-inherit ?\n)
(forward-char -1)
(comment-indent (cadr (assoc comment-style comment-styles)))
(save-excursion
(let ((pt (point)))
(end-of-line)
(let ((comend (buffer-substring pt (point))))
(delete-region pt (1+ (point)))
(beginning-of-line)
(backward-char)
(insert comend)
(forward-char))))))))))
(provide 'newcomment)