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[emacs-bidi] Re: Callbacks?
From: |
Eli Zaretskii |
Subject: |
[emacs-bidi] Re: Callbacks? |
Date: |
Fri, 02 Dec 2005 13:59:48 +0200 |
> Date: Fri, 02 Dec 2005 17:51:17 +0900
> From: Martin Duerst <address@hidden>
> Cc: address@hidden
>
> At 05:59 05/12/01, Eli Zaretskii wrote:
> >> Date: Wed, 30 Nov 2005 16:50:57 +0900
> >> From: Martin Duerst <address@hidden>
> >> Cc: address@hidden
> >>
> >> Where and how the cursor should be displayed, which physical
> >> direction it moves for cursor keys such as -> or <-, whether
> >> selection is logical or visual, and so on.
> >
> >This was all discussed here some time ago, please be sure to read the
> >list archives.
>
> Can you give me a pointer, e.g. to some specific message or
> to the approximate date?
It was in late 1997, so it's not in the public archives, as I wrote in
another mail. Sorry, I forgot about that.
> >> - In our current approach, we not only change the properties of some
> >> characters, but also introduce additional embedding (or occasionally
> >> override) levels. Is this possible in your implementation?
> >
> >I'm not sure I understand: embeddings and overrides are fully
> >supported, so what could be the problem?
>
> Well, it's similar to character properties: What you definitely
> support is the interpretation of RLE,... PDF characters to
> create an embedding. But as explained, we don't actually want
> to include these characters. As Kenichi explained, overlays
> may be a way to get the characters to the display engine
> without adding it to the text. Do you think this would
> do the job?
Yes, overlays can do the job, if we are talking about a display
feature, and if this is not going to be something we need to do for
many portions of the text (since too many overlays make redisplay very
slow).