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From: joaotavora@gmail.com (João Távora)
To: Alan Mackenzie <acm@muc.de>
Cc: emacs-devel@gnu.org
Subject: Re: Proposed extension of show-paren-mode: Highlight parens when point is in L or R margin.
Date: Tue, 14 Oct 2014 22:50:18 +0100	[thread overview]
Message-ID: <m2y4siwcbp.fsf@king.lan> (raw)
In-Reply-To: <20141011134312.GA4148@acm.acm> (Alan Mackenzie's message of "Sat, 11 Oct 2014 13:43:12 +0000")

Alan Mackenzie <acm@muc.de> writes:

> This is an idea which struck me when I was reading CC Mode code.  I find
> myself frequently scrolling through it, and frequently wanting to know
> where the matching paren for one at beginning of indentation is.  That
> involved me typing M-m an awful lot, and I've got tired of doing that.

I've gotten tired of that too, but I took a different approach (perhaps
one that has already been discussed here?)

    (global-set-key [remap move-beginning-of-line] 'joaot/move-beginning-of-line)
    (defun joaot/move-beginning-of-line ()
      (interactive)
      (let ((pos (point)))
        (back-to-indentation)
        (when (= pos (point)) (move-beginning-of-line nil))))

If the code is not self-explanatory enough, it makes C-a do-what-I-mean:
The first C-a brings me to start of indentation, a second one forces a
move to the proper beginning of line.

It solves this problem because C-a is perhaps the most ergonomic binding
of all, provided you remap caps-lock to control.

Of course, Alan, your solution requires no typing at all, but it also
does not solve the almost-as-common problem that you might want to move
the cursor to the opening parenthesis. 

This is the single feature that I miss most when using other people's
emacsen or Emacs -Q. It's the only piece of editor that I keep around
since I switched to Emacs 10 years ago, from Eclipse, which had (has?)
this on by default. I also used to have it on C-e, but I don't miss that
nearly as much.

Its current implementation as a separate command is slightly brittle for
modes that remap C-a such, as `message-mode', so I wonder if it could be
integrated in Emacs's own `move-beginning-of-line' via a suitably named
customization variable.

What do you think?
João



      parent reply	other threads:[~2014-10-14 21:50 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-11 13:43 Proposed extension of show-paren-mode: Highlight parens when point is in L or R margin Alan Mackenzie
2014-10-11 14:21 ` Eli Zaretskii
2014-10-12  8:39   ` Alan Mackenzie
2014-10-12  8:55     ` David Kastrup
2014-10-12  9:25       ` Alan Mackenzie
2014-10-12  9:01     ` Eli Zaretskii
2014-10-12 10:18       ` Alan Mackenzie
2014-10-12  4:12 ` Stefan Monnier
2014-10-12 10:04   ` Alan Mackenzie
2014-10-14 17:49     ` Stefan Monnier
2014-10-14 18:32       ` John Yates
2014-10-15  9:12       ` Alan Mackenzie
2014-10-15 22:38         ` Andy Moreton
2014-10-16  2:43         ` Stefan Monnier
2014-10-16  9:53           ` Alan Mackenzie
2014-10-16 12:59             ` Stefan Monnier
2014-10-16 13:31               ` Alan Mackenzie
2014-10-16 14:37                 ` Stefan Monnier
2014-10-16 15:46                   ` Alan Mackenzie
2014-10-16 17:40                     ` Stefan Monnier
2014-10-16 21:26                       ` Alan Mackenzie
2014-10-17  0:14                         ` Stefan Monnier
2014-10-14 21:50 ` João Távora [this message]

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