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Add documentation for changes to Show Paren mode.

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* lisp/paren.el (show-paren-highlight-openparen): Enhance doc string.

* doc/emacs/programs.texi (Matching): Add descriptions of some pertinent user
options, including the new show-paren-when-point-inside-paren and
show-paren-when-point-in-periphery.

* etc/NEWS (.. Specialized Modes ...): Add an entry for Show Paren mode.
Move an entry on pcase to the Lisp Changes section.
This commit is contained in:
Alan Mackenzie 2015-12-16 15:09:55 +00:00
parent c974b2fd4d
commit 6d4ae9d338
3 changed files with 41 additions and 4 deletions
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33
doc/emacs/programs.texi
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@ -833,9 +833,36 @@ displayed. The default is 102400.
@findex show-paren-mode
Show Paren mode, a global minor mode, provides a more powerful kind
of automatic matching. Whenever point is before an opening delimiter
or after a closing delimiter, both that delimiter and its opposite
delimiter are highlighted. To toggle Show Paren mode, type @kbd{M-x
show-paren-mode}.
or after a closing delimiter, the delimiter, its matching delimiter,
and optionally the text between them are highlighted. To toggle Show
Paren mode, type @kbd{M-x show-paren-mode}. To customize it, type
@kbd{M-x customize-group @key{RET} paren-showing}. The customizable
options which control the operation of this mode include:
@itemize @bullet
@item
@code{show-paren-highlight-open-paren} controls whether to highlight
an open paren when point stands just before it, and hence its position
is marked by the cursor anyway. The default is non-@code{nil} (yes).
@item
@code{show-paren-style} controls whether just the two parens, or also
the space between them get highlighted. The valid options here are
@code{parenthesis} (show the matching paren), @code{expression}
(highlight the entire expression enclosed by the parens), and
@code{mixed} (highlight the matching paren if it is visible, the
expression otherwise).
@item
@code{show-paren-when-point-inside-paren}, when non-@code{nil}, causes
highlighting also when point is on the inside of a parenthesis.
@item
@code{show-paren-when-point-in-periphery}, when non-@code{nil}, causes
highlighting also when point is in whitespace at the beginning or end
of a line, and there is a paren at, respectively, the first or last,
or the last, non-whitespace position on the line.
@end itemize
@cindex Electric Pair mode
@cindex inserting matching parentheses

7
etc/NEWS
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@ -623,6 +623,13 @@ invalid certificates are marked in red.
*** text/html messages that contain inline image parts will be
transformed into multipart/related messages before sending.
+++
** In Show Paren Mode, a parenthesis can be highlighted when point
stands inside it, and certain parens can be highlighted when point is
at BOL or EOL, or in whitespace there. To enable these, customize,
respectively, show-paren-when-point-inside-paren or
show-paren-when-point-in-periphery.
** pcase
*** New UPatterns `quote', `app', `cl-struct', and `eieio'.
*** New UPatterns can be defined with `pcase-defmacro'.

5
lisp/paren.el
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@ -87,7 +87,10 @@ whitespace there."
'show-paren-mismatch "22.1")
(defcustom show-paren-highlight-openparen t
"Non-nil turns on openparen highlighting when matching forward."
"Non-nil turns on openparen highlighting when matching forward.
When nil, and point stands just before an open paren, the paren
is not highlighted, the cursor being regarded as adequate to mark
its position."
:type 'boolean)
(defvar show-paren--idle-timer nil)