[Webkit-unassigned] [Bug 112488] REGRESSION (r145854): Mongolian characters are not upright in vertical writing mode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=112488





--- Comment #36 from SiqinBilige <siqinbilige at gmail.com>  2013-06-06 23:36:51 PST ---
(In reply to comment #35)
> (In reply to comment #8)
> > The latest version of Google Chrome on Mac OS and Android also can not display Traditional Mongolian Language vertical way.
> > 
> > If the same thing happen on next version of Safari, there is no browser on Mac OS X , iOS and Android can correctly display Traditional Mongolian Language vertical way.
> > 
> > The Traditional Mongolian UNICODE range is from 1800 to 18AF.
> > http://www.unicode.org/charts/PDF/U1800.pdf
> > The Traditional Mongolian Language is vertical only language and can not have space between glyphs in one word.
> > 
> > Any one can help on this bug for 10 million mongolian people who using Traditional Mongolian Language in the world ?
> > 
> > Thank you.
> 
> Hallo SiqinBilige,
> 
> you have to use "-webkit-text-orientation: sideways-right;" as workaround so that Mongolian are shaped correctly. Here is my demo page: https://dl.dropboxusercontent.com/u/16982795/mongol/test1.html
> 

Tuguldur

Thank you for your advise.
You are right, using "-webkit-text-orientation: sideways-right;" can display Traditional Mongolian Vertical way on Webkit like browsers.
But it is not good solution for the writing-mode:vertica-lr.
We are not only consider Traditional Mongolian only document.
We are must consider Traditional Mongolian mixed with other language document too. such as with CJK and Other symbols used in Traditional Mongolian document.

We believe you can understand our considering, after carefully look over screenshots below.

1. On Windows IE, correct CJK and symbols layout.
  mongolian_mixed_win_ie.png

2. On Windows Chrome, not correct CJK and symbols layout. (I can not download latest version of Webkit for windows)
  mongolian_mixed_win_chrome_no.png

3. On Windows Chrome (with "-webkit-text-orientation: sideways-right;"), not correct CJK and symbols layout.
  mongolian_mixed_win_chrome.png

4. On Mac OS Webkit, correct CJK and symbols layout.
  mongolian_mixed_mac_webkit_no.png

5. On Mac OS Webkit (with "-webkit-text-orientation: sideways-right;"), not correct CJK and symbols layout.
  mongolian_mixed_mac_webkit.png

It is what we are struggling here to fix this bug or want to fixed by some one else first.

> I have tested with Chrome and OperaNext on Mac. Both browsers can shape the Mongolian correctly (there is also another bug with 0x202F, see: https://code.google.com/p/chromium/issues/detail?id=155334).
> 
There is no bug about 0x202F.
You can confirm it look over the last line of screenshots.

But, there is a lot of other bugs about Traditional Mongolian(-webkit-writing-mode: vertical-lr;) forms in Webkit.
  https://bugs.webkit.org/show_bug.cgi?id=117228
  https://bugs.webkit.org/show_bug.cgi?id=117229
  https://bugs.webkit.org/show_bug.cgi?id=117231
  https://bugs.webkit.org/show_bug.cgi?id=117233

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