[Webkit-unassigned] [Bug 92864] New: The Webkit can not correctly display Traditional Mongolian Script.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=92864

           Summary: The Webkit can not correctly display Traditional
                    Mongolian Script.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
               URL: http://www.mongolfont.com
        OS/Version: Mac OS X 10.7
            Status: UNCONFIRMED
          Severity: Blocker
          Priority: P1
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: siqinbilige at gmail.com


Summary:

The Webkit can not correctly display Traditional Mongolian Script.

Traditional Mongolian script Standards have been accepted by ISO 10646 / Unicode 3.0 in 1999.
But the ISO 10646 / Unicode 3.0 standard only encoded the basic part of Traditional Mongolian characters(u1800-u18Af).

Traditiona Mongolian script is like arabic language have four forms isol,init,medi.fina.
Plus this each form have three alternates. the three alternates controlled by mongolian free veriation selector (u180B,u180C,u180D).

Webkit can not correctly display the traditional mongolian word which include mongolian free veriation selector (u180B,u180C,u180D). but Safari 5.0 can. Safari 6.0 can not.

Steps to Reproduce:
visit our home page with 6.0 (7536.25, 537+) on Mac OS X. (on the windows no problem) or see the screenshots.
our homepage is : http://www.mongolfont.com

Expected Results:
on the safari 5.0 or iOS 5 it is correct. scrennshot is onMacOSX103Safari.png, iOS5iPad.png

Actual Results:
on the Webkit it is not correct. screenshot is onSafariLastVertion.png, iOS6iPad.png

Regression:

Notes:

The layout of Traditional Mongolian script  is top-to-bottom in the row and left-to-right in the paragraph.
( CSS3 -webkit-writing-mode : vertical-lr )

On the Mac OS X Firefox And Opera can not correctly display Traditional Mongolian Script, because they are did not implement writing-mode of vertical. Chrome and Webkit can display Traditional Mongolian script vertical way, but can not correctly display The word witch include  mongolian free veriation selector (u180B,u180C,u180D) too. screenshot is onChromeLastVertion.png and onWebkitLastVersion.png

So before Safari 6.0 the only browser witch can display Traditional Mongolian Script on Mac OS X and iOS was Safari 5.0.
After Safari 6.0 no browser can correctly display Traditional Mongolian Script yet.

by the way. On the Mac OS X and iOS the u200C and u200D also have same problem too.
used by Traditional Mongolain Script some time. but not belong to Traditional Mongolian Script.

-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.