[Webkit-unassigned] [Bug 72796] New: [SVG] getBBox on a <g> within symbol returns 0 but with defs it works correctly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=72796

           Summary: [SVG] getBBox on a <g> within symbol returns 0 but
                    with defs it works correctly
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rakssvg at gmail.com
                CC: zimmermann at kde.org


When we do a getBBox on the <g> element inside a symbol, the value returned is 0,0
But if the <g> element is inside a <defs>, correct value is returned.

Following is the SVG code, If we replace symbol with defs we get the values correctly
Getting the BBox on a symbol is very important because we are making a library of graphical units using symbol and want to know the dimensions of elements in the symbol so that appropriate transformations can be done when the symbol is actually used with the <use> tag.

Moreover as per standards since we are doing a getBBox on a <g> which is SVGLocatable, getBBox should work correctly


<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1 Tiny//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-tiny.dtd">
<svg baseProfile="tiny" display="inherit" version="1.1" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ev="http://www.w3.org/2001/xml-events">
    <script><![CDATA[
        window.onload = function(){
            var l2 = document.getElementById('g0') ;
            alert(l2.getBBox().width) ;
            //alert(l2);
        }
    ]]></script>
    <symbol>
        <g id="g0">             
           <circle id="g1" cx="200" cy="200" r="20" fill="red"/>
           <circle cx="200" cy="100" r="20"/>
           <animateTransform repeatCount="indefinite" attributeName="transform" begin="0" type="translate" additive="sum" fill="freeze"  dur="2" keyTimes="0;0.5;1" values="200 150; 20 150;200 150"/>
           <animateTransform repeatCount="indefinite" attributeName="transform" begin="0" additive="sum" type="scale" fill="freeze"  dur="2" keyTimes="0;0.5;1" values="2 2;1 1;2 2"/>
           <animateTransform repeatCount="indefinite" attributeName="transform" begin="0" additive="sum" type="translate" fill="freeze"  dur="2" keyTimes="0;0.5;1" values="-200 -150; -20 -150;-200 -150"/>
       </g>
    </symbol>
    <use xlink:href="#symbol0" fill="green">
        <animate calcMode="linear" attributeName="display" begin="0" dur="2" keyTimes="0;0.2;0.5;0.8;1" values="inherit;none;inherit;none;inherit"/>
    </use>
    <use x="200" xlink:href="#symbol0" fill="blue"/>
</svg>

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