From: Wolfgang Jenkner <wjenkner@inode.at>
To: Drew Adams <drew.adams@oracle.com>
Cc: emacs-devel@gnu.org
Subject: Re: feature request: text property to prevent font-locking
Date: Sun, 31 Aug 2014 16:31:48 +0200 [thread overview]
Message-ID: <8538cc4sv7.fsf@iznogoud.viz> (raw)
In-Reply-To: b896ecdd-2457-4f84-8d0d-f58445db89f6@default
On Thu, Aug 28 2014, Drew Adams wrote:
> I want to apply some ad-hoc highlighting with text property `face'
> in a font-locked buffer (whether font-locking occurs before or after
> I apply `face' for this highlighting).
> I do not want font-lock to override this highlighting. I do not want
> to use `font-lock-keywords' (e.g. with KEEP) in order to create this
> highlighting. I just want to prevent font-lock from overriding it.
So, let me try to understand the extent of the problem.
font-lock-default-unfontify-region leaves alone any "alternative"
(defined in char-property-alias-alist) of the `face' text property.
In particular, this is how the font-lock-face text property works.
Now, on the one hand, keyword fontification does not override
"alternatives" (except if the highlight pattern has an `override' flag).
This is because text-property-not-all recognizes them and thus prevents
font-lock-apply-highlight from adding a value for the `face' property.
On the other hand, some experimenting suggests that syntactic
fontification does override those "alternatives".
> I want to apply some other text property to the highlighted text,
> to tell font-lock not to fiddle with it ("hands off this text").
Remove it from the value of `font-lock-extra-managed-props'.
tl; dr: Existing facilities reduce the problem to clashes with syntactic
fontification.
Wolfgang
next prev parent reply other threads:[~2014-08-31 14:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-28 21:18 feature request: text property to prevent font-locking Drew Adams
2014-08-30 9:27 ` Alan Mackenzie
2014-08-30 20:15 ` Drew Adams
2014-08-30 21:34 ` Thien-Thi Nguyen
2014-08-31 6:06 ` Drew Adams
2014-08-31 16:11 ` Drew Adams
2014-08-31 12:40 ` Stefan Monnier
2014-08-31 15:30 ` Drew Adams
2014-08-31 19:57 ` Stefan Monnier
2014-08-31 21:07 ` Drew Adams
2014-08-31 21:43 ` Alan Mackenzie
2014-09-01 1:37 ` Stephen J. Turnbull
2014-09-01 20:45 ` Stefan Monnier
2014-09-02 2:02 ` Stephen J. Turnbull
2014-09-02 2:33 ` Richard Stallman
2014-09-02 6:04 ` David Kastrup
2014-08-31 14:31 ` Wolfgang Jenkner [this message]
2014-08-31 16:03 ` Drew Adams
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