On 5/16/11 8:34 PM, Aryeh Gregor wrote:
On Mon, May 16, 2011 at 7:27 PM, Boris Zbarsky<[email protected]>  wrote:
Whether to prioritize is a CSS issue.  Whether there's a breakpoint at all
after the 'f' in the string "y = f(1)" is a quality of implementation issue,
imo.

Slightly tangential, but I once saw a page that displayed fine in
Gecko but broke horribly in WebKit because of the difference in
line-breaking algorithms.  There was a really long string in a user
comment which Gecko broke over multiple lines but WebKit treated as
unbreakable, with the result that WebKit stretched the page so it was
unreadable.  I think it would be pretty nice if we were to spec
line-breaking behavior -- UAX#14 specifies an algorithm that, as far
as I can tell, is reasonably simple and much better than any browser
now has.  (Although I can't say whether it would be acceptable for
performance or other considerations.)

I'm not a line-breaking expert. I'm pretty sure that the people who wrote the Gecko line-breaking code are very familiar with UAX#14, though, based on their code comments and bug comments. I'd suggest asking for their input on why Gecko does something different from UAX#14 if we're considering specifying it.

-Boris

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