Commit 5e61c1ef authored by Glenn Morris's avatar Glenn Morris

Some doc for cycle-spacing

* lisp/simple.el (just-one-space, cycle-spacing): Doc fixes.

* doc/emacs/killing.texi (Deletion): Mention cycle-spacing.

* doc/lispref/text.texi: Comment.

* etc/NEWS: Related edits.
parent 61c2b0b3
2014-01-29 Glenn Morris <>
* killing.texi (Deletion): Mention cycle-spacing.
2014-01-28 Glenn Morris <>
* text.texi (Fill Commands): Mention fill-single-char-nobreak-p.
......@@ -109,12 +109,11 @@ number of characters. If the numeric argument is omitted or one, they
delete all the text in the region if it is active (@pxref{Using
@c FIXME: `cycle-spacing' should be documented, too. (Maybe not in
@c this node, tho.) --xfq
@kindex M-\
@findex delete-horizontal-space
@kindex M-SPC
@findex just-one-space
@findex cycle-spacing
The other delete commands are those that delete only whitespace
characters: spaces, tabs and newlines. @kbd{M-\}
(@code{delete-horizontal-space}) deletes all the spaces and tab
......@@ -125,7 +124,11 @@ point, regardless of the number of spaces that existed previously
(even if there were none before). With a numeric argument @var{n}, it
leaves @var{n} spaces before point if @var{n} is positive; if @var{n}
is negative, it deletes newlines in addition to spaces and tabs,
leaving @var{-n} spaces before point.
leaving @var{-n} spaces before point. The command @code{cycle-spacing}
acts like a more flexible version of @code{just-one-space}. It
does different things if you call it repeatedly in succession.
The first call acts like @code{just-one-space}, the next removes
all whitespace, and a third call restores the original whitespace.
@kbd{C-x C-o} (@code{delete-blank-lines}) deletes all blank lines
after the current line. If the current line is blank, it deletes all
......@@ -771,6 +771,9 @@ space, or @var{n} spaces if @var{n} is specified. It returns
@end deffn
@c There is also cycle-spacing, but I cannot see it being useful in
@c Lisp programs, so it is not mentioned here.
@deffn Command delete-blank-lines
This function deletes blank lines surrounding point. If point is on a
blank line with one or more blank lines before or after it, then all but
......@@ -273,16 +273,14 @@ normal editing behavior.
the last step. Its default value is changed to nil, which means a tab
stop every `tab-width' columns.
** Filling changes
*** New command `cycle-spacing' cycles between spacing conventions:
having just one space, no spaces, or reverting to the original
spacing. Like `just-one-space', it can handle or ignore newlines and
leave different number of spaces.
** New command `cycle-spacing' acts like a smarter `just-one-space'.
When called in succession, it cycles between spacing conventions:
one space, no spaces, original spacing.
*** `fill-single-char-nobreak-p' prevents fill from breaking a line after
a one-letter word, which is an error according to some typographical
** The new function `fill-single-char-nobreak-p' can stop fill from breaking
a line after a one-letter word, which is an error in some typographical
conventions. To use it, add it to the `fill-nobreak-predicate' hook.
2014-01-29 Glenn Morris <>
* simple.el (just-one-space, cycle-spacing): Doc fixes.
2014-01-28 Martin Rudalics <>
* window.el (fit-frame-to-buffer): Fix calculations for margins and
......@@ -794,7 +794,8 @@ If BACKWARD-ONLY is non-nil, only delete them before point."
(defun just-one-space (&optional n)
"Delete all spaces and tabs around point, leaving one space (or N spaces).
If N is negative, delete newlines as well, leaving -N spaces."
If N is negative, delete newlines as well, leaving -N spaces.
See also `cycle-spacing'."
(interactive "*p")
(cycle-spacing n nil t))
......@@ -805,31 +806,22 @@ position and original spacing around the point in this
(defun cycle-spacing (&optional n preserve-nl-back single-shot)
"Manipulate spaces around the point in a smart way.
"Manipulate whitespace around point in a smart way.
In interactive use, this function behaves differently in successive
consecutive calls.
When run as an interactive command, the first time it's called
in a sequence, deletes all spaces and tabs around point leaving
one (or N spaces). If this does not change content of the
buffer, skips to the second step:
The first call in a sequence acts like `just-one-space'.
It deletes all spaces and tabs around point, leaving one space
\(or N spaces). N is the prefix argument. If N is negative,
it deletes newlines as well, leaving -N spaces.
\(If PRESERVE-NL-BACK is non-nil, it does not delete newlines before point.)
When run for the second time in a sequence, deletes all the
spaces it has previously inserted.
The second call in a sequence (or the first call if the above does
not result in any changes) deletes all spaces.
When run for the third time, returns the whitespace and point in
a state encountered when it had been run for the first time.
The third call in a sequence restores the original whitespace (and point).
For example, if buffer contains \"foo ^ bar\" with \"^\" denoting the
point, calling `cycle-spacing' command will replace two spaces with
a single space, calling it again immediately after, will remove all
spaces, and calling it for the third time will bring two spaces back
If N is negative, delete newlines as well. However, if
PRESERVE-NL-BACK is t new line characters prior to the point
won't be removed.
If SINGLE-SHOT is non-nil, will only perform the first step. In
other words, it will work just like `just-one-space' command."
If SINGLE-SHOT is non-nil, it only performs the first step in the sequence."
(interactive "*p")
(let ((orig-pos (point))
(skip-characters (if (and n (< n 0)) " \t\n\r" " \t"))
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