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Re: Bidirectional editing in Emacs -- main design decisions
From: |
Stefan Monnier |
Subject: |
Re: Bidirectional editing in Emacs -- main design decisions |
Date: |
Tue, 19 Apr 2011 10:11:33 -0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) |
> After careful thought, I changed my mind about this part. Whenever
> the redisplay iterator finds text that is covered by a `display' text
> property or by an overlay with a `display', `before-string', or
> `after-string' property, it will not stop reordering. Instead, it
> will treat the entire run of text covered by the text property or
> overlay as a single atomic entity, and will reorder it as if it were a
> single special character whose name in Unicode is OBJECT REPLACEMENT
> CHARACTER (u+FFFC). This character's bidirectional category (Other
> Neutral) and other properties are designed so that it can stand for
> display features such as embedded images, and in particular it is
> reordered as appropriate for such embedded objects.
> This will reorder images and display strings in the same way wrt
> surrounding text, which I think is reasonable. It is also in line
> with the pre-Emacs 24 unidirectional display engine, which skipped the
> text covered by such properties in one go, after displaying the image
> or a display string specified by the property.
It sounds very reasonable, but at the same time I don't understand in
which way it differs from your earlier opinion that it should "stop
reordering" (whose meaning is very unclear to me).
Stefan
- Re: Bidirectional editing in Emacs -- main design decisions, Eli Zaretskii, 2011/04/18
- Re: Bidirectional editing in Emacs -- main design decisions,
Stefan Monnier <=
- Re: Bidirectional editing in Emacs -- main design decisions, Eli Zaretskii, 2011/04/19
- Re: Bidirectional editing in Emacs -- main design decisions, Stefan Monnier, 2011/04/19
- Re: Bidirectional editing in Emacs -- main design decisions, Mohsen BANAN, 2011/04/25
- Re: [emacs-bidi] Bidirectional editing in Emacs -- main design decisions, Eli Zaretskii, 2011/04/25
- Re: Bidirectional editing in Emacs -- main design decisions, Mohsen BANAN, 2011/04/25
- Re: Bidirectional editing in Emacs -- main design decisions, Eli Zaretskii, 2011/04/25
- Now: Paragraph Direction Detection and Harmonization -- Was: Re: Bidirectional editing in Emacs -- main design decisions, Mohsen BANAN, 2011/04/25
- Re: Now: Paragraph Direction Detection and Harmonization -- Was: Re: Bidirectional editing in Emacs -- main design decisions, Eli Zaretskii, 2011/04/25
- Re: Now: Paragraph Direction Detection and Harmonization -- Was: Re: Bidirectional editing in Emacs -- main design decisions, Mohsen BANAN, 2011/04/26
- Re: Now: Paragraph Direction Detection and Harmonization -- Was: Re: Bidirectional editing in Emacs -- main design decisions, Eli Zaretskii, 2011/04/26