GNU bug report logs - #8897
`completion--insert-strings' clobbers user-added text properties

Previous Next

Full log

Message #14 received at 8897 <at> debbugs.gnu.org (full text, mbox):

From: Štěpán Němec <stepnem <at> gmail.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 8897 <at> debbugs.gnu.org
Subject: Re: bug#8897: `completion--insert-strings' clobbers user-added text
	properties
Date: Mon, 20 Jun 2011 10:07:41 +0200

Stefan Monnier <monnier <at> iro.umontreal.ca> writes:

>> In my particular case I define annotations as buttons (which display
>> even more detail about a completion value upon activation), so a visual
>> indication of clickability is very important for me.
>
> Currently, the completion-list-mode uses the `mouse-face' text-property
> to determine what is a completion item and what i something else (blank
> space, annotation, you name it).  So as it stands, any mouse-face you'd
> add to an annotation would confuse completion-list-mode into thinking it
> is a completion item.
>
> Maybe you could try to use the `category' text-property instead.

Well I do use the `category' property, but the button functions seem to
set up the button face automatically, which is then clobbered by
`completion--insert-strings' (which is the problem). Here's how I set up
an annotation, `n' being the number of a pull request as a string (i.e.,
the completion value itself):

#+begin_src elisp
(let ((req (assoc-default n minibuffer-completion-table)))
  (concat " "
          (propertize (plist-get req :title)
                      'fontified t
                      'button '(t)
                      'category 'default-button
                      'help-echo "RET or mouse-2 for details"
                      'pr-data req
                      'action (lambda (b) (magithub-pull-request-details
                                           (button-get b 'pr-data))))))
#+end_src

With my patch I haven't noticed any problems you mention -- clicking
or RET on the completion itself selects it, clicking or RET on the
annotation displays further details, the button face is preserved.

  Štěpán

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.