[Webkit-unassigned] [Bug 93331] New: "grc" language (Ancient Greek) probably should be mapped to Greek script

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=93331

           Summary: "grc" language (Ancient Greek) probably should be
                    mapped to Greek script
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
               URL: http://en.wikipedia.org/wiki/Pankration
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: falken at chromium.org
                CC: ap at webkit.org, jshin at chromium.org


It looks like ICU doesn't assign a script for "grc" language (Ancient Greek). For example:

  char maximizedLocale[ULOC_FULLNAME_CAPACITY];
  uloc_addLikelySubtags("grc", maximizedLocale, sizeof(maximizedLocale), &status);
  // now maximizedLocale is "grc"

  char script[ULOC_SCRIPT_CAPACITY];
  uloc_getScript(maximizedLocale, script, sizeof(script), &status);
  // returns 0, and now script is the empty string. status is success.

Since "grc" is not mapped to a script, WebKit will use the font for the Common script, which might not be appropriate, especially for CJK fonts (see bug 88545).

We should check whether it's intentional that ICU/CLDR doesn't assign a script to "grc". Curiously, in icu/source/data/misc/supplementalData.txt, there is:
        grc{
            secondary{
                scripts{
                    "Cprt",
                    "Grek",
                    "Linb",
                }
            }
        }
So it's possible ICU can return these scripts somehow (though we'd then have to choose between them).

Wikipedia uses lang="grc" in articles like <http://en.wikipedia.org/wiki/Pankration>

FWIW, Firefox has the same behavior: lang="grc" content isn't rendered using their Greek font setting

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