[Webkit-unassigned] [Bug 77568] New: Different font glyphs for Hebrew/Yiddish not being displayed

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=77568

           Summary: Different font glyphs for Hebrew/Yiddish not being
                    displayed
           Product: WebKit
           Version: 525.x (Safari 3.2)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.7
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: zeevclem at gmail.com


Created an attachment (id=124985)
 --> (https://bugs.webkit.org/attachment.cgi?id=124985&action=review)
Zip file containing the bug illustration files mentioned in the Description.

Both the Hebrew and Yiddish language use the same Hebrew character set. However, in Yiddish, for the "pasekh tsvey yudn" and "khirik yud" character combinations, the convention is to "raise" the vowel. This is done for Yiddish only, not Hebrew. It is possible on an HTML page to differentiate Yiddish text from Hebrew text using the "lang" attribute and to display the Yiddish glyphs when 'lang="yi"' is specified and to display the Hebrew glyphs when 'lang="he"' is specified; however, WebKit/Safari does not do this. This is not a WebKit-only issue, most browsers have this same bug. Firefox only recently fixed the bug in Firefox 10.0beta (see this Firefox bug, in particular the last few comments in the comment thread: https://bugzilla.mozilla.org/show_bug.cgi?id=694205). 

In order to demonstrate the problem and to illustrate the correct behaviour, I have attached a zip file with the following:

1. yiddish-hebrew.html : A basic example to illustrate the problem.
2. Firefox.jpg : A screen shot of the correct Hebrew & Yiddish vowel positioning in Firefox 10.0beta.
3. Safari.jpg : A screen shot showing the correct Hebrew & INCORRECT Yiddish vowel positioning in Safari.
4. FreeSans ttf files (4) : The FreeSans font used in the yiddish-hebrew.html example. FreeSans is one of the fonts in GNU FreeFont (http://www.gnu.org/software/freefont/) and the ttf files were built from the current SVN source files. These files should be used to replicate the issue because not all fonts provide support for the different Hebrew/Yiddish glyphs.

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