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Re: current-column and display (space :align-to) properties
From: |
Kim F. Storm |
Subject: |
Re: current-column and display (space :align-to) properties |
Date: |
Thu, 12 Jan 2006 09:41:42 +0100 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
Michael Mauger <address@hidden> writes:
> I think a basic solution to this (report integer column number with no
> accounting for font widths) is needed now (before the release) since many of
> the display properties are new and cause inconsistent behavior in some basic
> functions.
The mentioned display properties are not new (they were introduced in
21.1), so the problem is not new either.
> I've looked at the code, and understand where the changes are needed, but am
> not very comfortable with Emacs internals. I'll take a look and see if I can
> puzzle my way thru but my time for it is limited.
If you manage to fix current-column (actually current_column_1),
please remember to fix move-to-column in a similar way!
My best guess is that it must be fixed in a way which calls redisplay
internally to calculate the proper column. Otherwise, there are just
too many things which can go wrong -- e.g. newlines with display
properties, etc.
Try this:
(insert "["
(propertize "01\n23"
'display '(space :align-to 10))
"]ZZ\n")
A good test would be
M-: (move-to-column (current-column))
--
Kim F. Storm <address@hidden> http://www.cua.dk