[Bug 16228] Font matching algorithm should explain cluster-based matching

https://www.w3.org/Bugs/Public/show_bug.cgi?id=16228

--- Comment #1 from John Daggett <jdaggett@mozilla.com> 2012-03-05 00:35:27 UTC ---
(In reply to comment #0)
> Mozilla is going to implement cluster-based font matching. The spec should be
> updated accordingly.

The right way to term this is that the CSS3 Fonts spec needs to clearly define
font fallback behavior for character clusters, so that user agents can
implement this in a consistent way.

There are several relevant issues here:

- exact definition of a "cluster" in this case
- priority of base + combining character vs. precomposed characters
- role of normalization and specifying this in a way that does *not* normalize
characters like CJK compatibility ideographs.

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Received on Monday, 5 March 2012 00:35:29 UTC