[EMAIL PROTECTED] wrote:
> On Mar 14, 4:11 pm, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
> wrote:
>> In the new textframe world, I've reorganized our implementation 
>> ofwhitespacecollapsing.
>>
>> The situation is confusing because there are really three kinds 
>> ofwhitespacecollapsing and elimination:
>> 1) Collapsing of multiple consecutive spaces (including spaces
>> consecutive across node boundaries) into one; the first space is
>> retained and all the others are eliminated.
> 
> Related to this I've run into a problem with ZWSP. HTML says that ZWSP
> should collapse with other whitespace:
> http://www.w3.org/TR/html401/struct/text.html#didx-white_space-1
> 
> Currently we don't do this --- e.g.
> A&#x200b; &#x200b; &#x200b;B
> Is rendered with two spaces.
> 
> If we try to do this, things get complicated because we need to track
> whether a run of whitespace is all zero-width whitespace (in which
> case it should collapse into a zero-width whitespace) or there's some
> non-zero-width whitespace (in which case it should collapse into a
> regular space). But the problem *then* is that we can no longer always
> retain the first space and eliminate the others. E.g.
> <span>&#x200b;</span>&#x200b; Foo
> We don't know whether the ZWSP in the span survives or not until we
> encounter the first non-ZWSP after it. This makes life very
> uncomfortable.
> 
> Any thoughts on what the right thing to do is here?

CSS doesn't say anything about collapsing zwsp.

~fantasai
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