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From: Alan Schmitt <alan.schmitt@polytechnique.org>
To: emacs-devel@gnu.org
Subject: set-text-properties and jit-lock-mode
Date: Sun, 21 Feb 2016 19:02:31 +0100	[thread overview]
Message-ID: <m24md20wnc.fsf@polytechnique.org> (raw)

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Hello,

I'm tracking down a bug in ledger-mode and I'm now at the point where I
think I need some help about some emacs core code.

The problem: if jit-lock-mode it t, then using set-text-properties to
change the face does not work.

To reproduce: start emacs with -Q. In the scratch buffer, type "foo".
Then evaluate:
(set-text-properties 192 195 (list 'face 'italic))

Nothing changes, and when I do a `describe-char' on one letter of "foo"
I don't see the face.

If I then evaluate
(setq jit-lock-mode nil)
(set-text-properties 192 195 (list 'face 'italic))

then I see the face change to italic, confirmed by `describe-char'.

As `set-text-properties' is a function in C, I don't know how to look at
its source (any pointers on how to do this would be great). Is it
supposed not to work for faces when jit-lock is on?

Thanks,

Alan

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OpenPGP Key ID : 040D0A3B4ED2E5C7
Monthly Athmospheric CO₂ (2016-01, Mauna Loa Obs.): 402.52

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             reply	other threads:[~2016-02-21 18:02 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-21 18:02 Alan Schmitt [this message]
2016-02-21 19:04 ` set-text-properties and jit-lock-mode Alan Mackenzie
2016-02-22  7:29   ` Alan Schmitt
2016-02-24  3:40   ` Stefan Monnier
2016-02-21 20:30 ` Eli Zaretskii
2016-02-22  7:38   ` Alan Schmitt
2016-02-22  8:51     ` Anders Lindgren
2016-02-22  9:02       ` Alan Schmitt

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