From: Erik van der Poel (erik@vanderpoel.org)
Date: Mon Jun 13 2005 - 12:08:30 CDT
[I'm not on the www-style list.]
fantasai wrote:
> For characters within the same inline sequence.
>
> 1. Shaping and joining behavior MUST NOT be affected by element
> boundaries.
If the CSS "display" property is set to "none" for a particular element,
then perhaps the characters in adjacent displayable elements should not
be joined to the characters in the "display: none" element.
(Maybe you already thought of this, and that is what is meant by "same
inline sequence"?)
> 4. Obligatory ligatures MUST NOT be broken if the formatting rules
> introduce no extra space between the affected characters, even
> if this means some of the characters are rendered in the wrong
> font or as part of the wrong visual element.
Perhaps the spec could say that an implementation MAY honor such things
as a color change (which may not be possible in current font
technologies such as OpenType?) or MAY instead use the isolated forms of
the individual characters. I don't know whether the obligatory ligature
rules should trump the style rules.
> 5. Combining characters MUST be rendered as the combined grapheme
> cluster if the system is capable of rendering the combination,
> even if this means some of the characters are rendered in the
> wrong font or as part of the wrong visual element. The combined
> grapheme cluster SHOULD be rendered as part of the base
> character's element, or, in the case of combining jamos, the
> initial character's element.
Here again, shouldn't the style rules trump the Unicode rules?
Otherwise, why should we even allow tags to be inserted between such
characters?
Erik
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