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Re: [css3-text] line break opportunities are based on *syllable* boundaries?

From: Alan Gresley <alan@css-class.com>
Date: Sun, 30 Jan 2011 18:55:58 +1100
Message-ID: <4D45198E.6070905@css-class.com>
To: Ambrose LI <ambrose.li@gmail.com>
CC: Boris Zbarsky <bzbarsky@mit.edu>, www-style@w3.org, www-international@w3.org
On 30/01/2011 2:39 PM, Ambrose LI wrote:
> 2011/1/29 Boris Zbarsky<bzbarsky@mit.edu>:

>> If it's marked up (<name>,<span class="name">, whatever), then it seems
>> that all that's needed on the CSS end is saying that "white-space:nowrap"
>> should prevent linebreaks even at non-whitespace breaking opportunities.
>>   Which is what UAs do in practice, and what the spec seems to say already.
>>
>> Am I just missing something?
>
> I asked the same question a few years ago. Unfortunately, the problem
> is that all the attribute that SHOULD be able to do such things either
> do not act on CJK characters or do not act on anything that is not a
> block. As to why we have these restrictions, this is completely beyond
> my understanding.


Hello Ambrose and Boriz,

 From my work with rtl and block formatting, inline formatting, etc., 
etc., I now theorized that the problems we see with bidi reordering, 
run-ins, overflow, white-space, line breaks,etc. and how these are 
different among UA rendering engines is due to construction (nesting and 
arrays ?) of the code base of these engines.

Take this patch,

https://bug501847.bugzilla.mozilla.org/attachment.cgi?id=404666

for this bug.

https://bugzilla.mozilla.org/show_bug.cgi?id=501847


Each rendering engines has a different tree of C++. Initially, 
especially with Trident, there was a bias toward the writing-mode with 
left to right inline formatting and top to bottom block formatting. IE8 
corrected this and implemented multiple writing modes. Opera 11 (Presto) 
still chokes with RTL and WebKit a little less.

Considering all of this, we have a long way to go to deal with the full 
complexities of CJK or other scripts.


Somehow expecting a reply from Boriz saying I'm completely wrong. Such 
is life. :-)


-- 
Alan http://css-class.com/

Armies Cannot Stop An Idea Whose Time Has Come. - Victor Hugo
Received on Sunday, 30 January 2011 07:56:35 GMT

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