From: Michael Heerdegen <michael_heerdegen@web.de>
To: help-gnu-emacs@gnu.org
Subject: Re: How to add syntax-highlighting to a Help buffer?
Date: Sat, 04 Jul 2015 01:22:39 +0200 [thread overview]
Message-ID: <87si94x1vk.fsf@web.de> (raw)
In-Reply-To: cvmtmrFqcegU1@mid.individual.net
Raffaele Ricciardi <rfflrccrd@gmail.com> writes:
> (font-lock-add-keywords
> nil
> `(("\\(arbitrary regexp\\)" 1 'font-lock-function-name-face)))
>
> But the above expression breaks the existing highlighting (the
> highlighting of the function arguments disappears).
AFAICT you experience a normal "feature" of font-lock-mode.
help-mode doesn't use font-lock. It directly attaches face text
properties to the buffer text. If font-lock-mode fontifies such a
buffer (it doesn't as long as font-lock-keywords is nil even when it is
active), all face text properties get ignored by the display engine.
Note that there is a font-lock-face text property existing as well.
hi-lock works in this case because it handles that case specially and
uses overlays.
HTH,
Michael.
next prev parent reply other threads:[~2015-07-03 23:22 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-03 7:59 How to add syntax-highlighting to a Help buffer? Raffaele Ricciardi
2015-07-03 9:20 ` Vaidheeswaran C
2015-07-03 20:09 ` Emanuel Berg
2015-07-03 23:22 ` Michael Heerdegen [this message]
2015-07-04 15:09 ` Emanuel Berg
2015-07-04 15:25 ` Michael Heerdegen
2015-07-04 23:24 ` Emanuel Berg
2015-07-04 16:30 ` tomas
2015-07-04 23:25 ` Emanuel Berg
[not found] ` <mailman.6316.1436023528.904.help-gnu-emacs@gnu.org>
2015-07-04 17:29 ` Raffaele Ricciardi
2015-07-04 17:43 ` Michael Heerdegen
2015-07-04 23:31 ` Emanuel Berg
[not found] ` <mailman.6317.1436027452.904.help-gnu-emacs@gnu.org>
2015-07-04 17:54 ` Stefan Monnier
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