[css-writing-modes] Re: Fwd: Is it possible to choose rotational direction of vertical script if I want to force them to display horizontally?

Then is it possible to specify something in CSS writing mode level 3 to
change the line orientation?

The line orientation example in https://www.w3.org/TR/css3-writing-modes/
section 1 suggest that the right hand side is the up direction, however
according to what I've seen, it's true for the case when it's arranged
together with other horizontal-tb, ltr text, but I'm not sure about what'd
happen if those Mongolian text are placed within Arabic or Uyghur text, and
I think those who can write Mongolian text and are not influenced by
default direction in computer, nor modern ltr publication (which are all
ltr by default) might not consider right hand side as top.

The draft also stated that, for Mongolian text, "In horizontal text, they
are typeset in a 90° counter-clockwise rotation from this orientation."
which I am aware of it is the genral approach to handle Mongolian text in
horizontal emvironment nowadays but I don't know if it is 100% universal.

I think adding an attribute for these nonrotatable vertical text so that
user can choose if it want the left side or right side to be top/upright
when it's forced horizontal or when there's elements like overline and
underline might be a good idea? That's like specifying if you want your
English text to appear with the character "A"'s head pointing left or right
when it have to be rotated.

On the other hand, according to the draft, vertical 'mixed' typeset can't
be handled automatically for Ogham or Old Turkic as per UTR50 and css
writing mode and it suggest the use of sideways-lr as a workarpund but the
draft also say sideways-lr might be dropped. I wonder if it can be solved
by the attributes I have just suggested plus a new vertical-bt.

A bit more note: In the CR's Appendix A it said Old Turkic is ttb in its
Vertical direction but there's some other pages who say it is btt. Which
one is correct?

And actually in the current status what is the expected behaviour for
Mongolian text in vertical-tb, rtl environment? would they form in a wrong
way or force itself ltr?
2016/01/26 15:17 "fantasai" <fantasai.lists@inkedblade.net>:

> On 01/25/2016 08:23 AM, gfb hjjhjh wrote:
>
>> For instance, traditional Mongolian script write in vertical-lr mode
>> (text run vertically from top to bottom, first line start on left),
>> if you use css writing mode horizontal-tb (default) then you can
>> force it horizontal by rotating each line of the text by 90 degree
>> anticlockwise, and the resultant text would be ltr. However, I just
>> read on a Chinese webpage http://www.zhihu.com/question/30727581
>> which claim there're a "traditional way" of writing Mongolian
>> horizontally by rotating it 90 degree clockwise (despite I am not
>> sure about what kind of tradition the webpage is referring to nor
>> do i know is it legit.), is this achievable via css?
>>
>
> I don't think this is possible in CSS, except for one-line text
> (using 'transform' to flip it 180deg). As for tradition... I don't
> think Mongolian has ever been written horizontally, traditionally.
> It *was* however derived from an RTL script that was rotated 90deg
> counter-clockwise to create Mongolian, so perhaps that is what they
> are referring to.
>
> ~fantasai
>