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From: | David Kastrup |
Subject: | Re: Retrieve front-advance from make-overlay |
Date: | Mon, 15 Jan 2007 08:20:25 +0100 |
User-agent: | Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
"Lennart Borgman (gmail)" <address@hidden> writes: > Stefan Monnier wrote: >>> Is it possible to retrieve from an overlay the parameters front-advance and >>> rear-advance that was given to make-overlay? >> >>> Without that it is not possible to make a new copy of an overlay AFAICS. >> >> The source code of `copy-overlay' answers this question. > > Thanks. Indeed it does ;-) -- BTW copy-overlay is not mentioned in Info. (defun overlay-polarities (ov) (let ((buf (overlay-buffer ov)) (start (overlay-start ov)) (end (overlay-end ov))) (unwind-protect (with-temp-buffer (move-overlay ov 1 1) (insert " ") (list (> (overlay-start ov) 1) (> (overlay-end ov) 1))) (move-overlay ov buf start end)))) This at least has the advantage of not touching the original buffer. But it is tasteless nevertheless. -- David Kastrup
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