Re: [emacs-bidi] Display of continuation lines

[Roozbeh Pournader]

I prefer the second form, the first form will be unreadable, specially
when the string gets longer. But I think having some bidi support on Emacs
has more priority than these details.

roozbeh

On Mon, 1 Oct 2001, Eli Zaretskii wrote:

> The main problem with continuation lines is that, AFAIK, implementing
> the second form of display above is infeasible with the current design
> of the Emacs display engine, because the decision whether the current
> line should be continued is made only after computing the glyphs for
> each display element and after the computed glyphs are entered into
> the glyph matrices.  By contrast, rearrangement of the characters from
> logical to visual order must happen _before_ computations of the
> display elements, and so it cannot know whether the current line is to
> be broken, and where.  Adding line-break computations to the logical-
> to-visual transformation would slow down the display a great deal.
>
> So if you think that the correct display is the second variant above,
> please also tell whether it is reasonable to defer the solution of
> this to a later time, and have the initial bidi support in Emacs work
> like shown in the first variant.
>
> Any comments are welcome.