[Webkit-unassigned] [Bug 15781] New: REGRESSION: Ligatures fail to form when typing in Devanagari (because WebKit can't handle a marked range that covers half of a composed character sequence)

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=15781

           Summary: REGRESSION: Ligatures fail to form when typing in
                    Devanagari (because WebKit can't handle a marked range
                    that covers half of a composed character sequence)
           Product: WebKit
           Version: 523.x+ (nightly)
          Platform: Macintosh
        OS/Version: All
            Status: NEW
          Keywords: InRadar
          Severity: Critical
          Priority: P1
         Component: Forms
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: oliver at apple.com


Create a new message in mail. Select the Devanagari keyboard. Begin typing.
Characters that should form ligatures are rendered separately not in
combination. For example, the key sequence K D Shift-comma should produce a
single glyph (see picture)

This problem only seems to happen with text typed directly into mail. Create
the text in Text Edit (which works correctly) and copy into mail. The text will
render correctly.

The same problem happens with Gujarati, but not with Tamil or Arabic.


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