[Webkit-unassigned] [Bug 99893] New: When there are two elements with the same ID, xlink:href should refer to the first.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=99893

           Summary: When there are two elements with the same ID,
                    xlink:href should refer to the first.
           Product: WebKit
           Version: 420+
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: pdr at google.com
                CC: zimmermann at kde.org


Created an attachment (id=169732)
 --> (https://bugs.webkit.org/attachment.cgi?id=169732&action=review)
Testcase

When there are two elements with the same ID, xlink:href should refer to the first, even if they are added to the document out of order.

Our current resource tracking implementation in SVGDocumentExtensions.cpp does not handle the case when a duplicate ID is added after (in document time) but before (in document order). See the attached testcase for an example.

<tref xlink:href="abcd"/>

<text id="abcd"> </text> <-- tref should point to the first text, even if it is dynamically added after the other duplicated id.
<text id="abcd"> </text>

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