[Webkit-unassigned] [Bug 71194] paragraphs with different directionality in textarea with unicode-bidi: plaintext are aligned the same

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=71194





--- Comment #2 from Aharon (Vladimir) Lanin <aharon at google.com>  2011-12-05 23:59:06 PST ---
(In reply to comment #1)
> Are there relevant specs that specifiy this behavior?

That's the way it was imagined when plaintext was first suggested, and that meeting's notes have the following formulation:

If the element's text-align or text-align-last is start or end, for every line box contained completely within the element, the alignment is determined by the paragraph level of the containing UBA paragraph that got its paragraph level from this element.

However, this is not a spec and has no actual standing. No mention of this behavior was ever made in the plaintext spec in CSS Writing Modes Level 3. That spec's editor, who also made the formulation above, is unsure why it was dropped from the spec. There has not yet been any guidance from the CSS WG on whether the spec is likely to be changed in this respect.

> Should this happen on any element that doesn't specify text-align or direction?

It should happen when the element's text-align (or text-align-last) is "start" or (in reverse) if it's "end". Please note that "start" is the default value of text-align for the root element, but from there on it is determined by inheritance when not explicitly specified. The start and end values normally work on the basis of the element's direction property, but the very nature of the suggestion is that in a unicode-bidi:plaintext element, the start and end values should work off the paragraph direction instead (and thus ignore the element's direction).

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