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From: Eli Zaretskii <eliz@gnu.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org, miles@gnu.org
Subject: Re: Combining face and map stuff
Date: Wed, 13 Oct 2010 07:41:07 -0400	[thread overview]
Message-ID: <E1P5zhj-0003ju-FX@fencepost.gnu.org> (raw)
In-Reply-To: <jwvpqvfjh5i.fsf-monnier+emacs@gnu.org> (message from Stefan Monnier on Tue, 12 Oct 2010 16:23:57 -0400)

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: miles@gnu.org,  emacs-devel@gnu.org
> Date: Tue, 12 Oct 2010 16:23:57 -0400
> 
> > Let's say we have a buffer, in which both package foo and package bar
> > defined different faces for the same piece of text.  Which one of them
> > will be displayed, and how would the display engine know to choose it?
> 
> Internally, one of them sets the property (foo . face) to <face1>, the
> other one sets the property (bar . face) to <face2>, and when these are
> set, the `face' property gets set to (<face1> <face2>).  The display
> engine only looks at the `face' property, just as before.

So it's just a convenience feature, to avoid something like

  get existing text property value
  merge with another value
  put it back with add-text-property

in every package?



  reply	other threads:[~2010-10-13 11:41 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-02 14:21 Combining face and map stuff Lars Magne Ingebrigtsen
2010-10-02 16:21 ` Chong Yidong
2010-10-02 16:41   ` Lars Magne Ingebrigtsen
2010-10-03  2:04     ` Miles Bader
2010-10-03  4:16     ` Chong Yidong
2010-10-03 13:08       ` Lars Magne Ingebrigtsen
2010-10-03 23:37 ` Stefan Monnier
2010-10-04  7:56   ` Eli Zaretskii
2010-10-04  9:03     ` Miles Bader
2010-10-04  9:42       ` Eli Zaretskii
2010-10-05  0:12         ` Miles Bader
2010-10-05 23:43           ` Stefan Monnier
2010-10-06  3:57             ` Eli Zaretskii
2010-10-07  7:40               ` Stefan Monnier
2010-10-07 13:56                 ` Eli Zaretskii
2010-10-07 18:08                   ` Stefan Monnier
2010-10-12 19:09                     ` Eli Zaretskii
2010-10-12 20:23                       ` Stefan Monnier
2010-10-13 11:41                         ` Eli Zaretskii [this message]
2010-10-13 12:42                           ` Stefan Monnier

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