Bug 576986 - Fix pointer-events on foreignObject with clip-path. r=roc

content/svg/content/test/test_pointer-events.xhtml

@@ -16,8 +16,18 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=500174
   <div width="100%" height="1" id="div">
   </div>
   <svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" id="svg">
+    <defs>
+      <clipPath id="clip">
+        <rect x="20" y="20" width="50" height="50"/>
+      </clipPath>
+    </defs>
     <rect id="bad" width="100%" height="100%" fill="green"/>
     <circle id="good" cx="50%" cy="50%" r="1" stroke-width="1000" fill="black" pointer-events="all"/>
+      <foreignObject id="fo" x="200" y="50" width="50" height="50" clip-path="url(#clip)">
+      <svg>
+        <rect width="100%" height="100%" fill="green"/>
+      </svg>
+    </foreignObject>
   </svg>
 
 </div>
@@ -30,10 +40,17 @@ SimpleTest.waitForExplicitFinish();
 function run()
 {
   var svgDoc = document.getElementById('svg');
-  var bad = document.getElementById('bad');
+  var div = document.getElementById("div");
+  var x = div.offsetLeft;
+  var y = div.offsetTop;
   var good = document.getElementById('good');
-  var elementFromPoint = document.elementFromPoint(50, 50);
-  is(elementFromPoint, good, 'pointer-events="all"');
+  var fo = document.getElementById('fo');
+  var elementFromPoint = document.elementFromPoint(55 + x, 55 + y);
+  is(good, elementFromPoint, 'pointer-events="all"');
+  elementFromPoint = document.elementFromPoint(205 + x, 55 + y);
+  is(good, elementFromPoint, 'foreignObject with clip-path');
+  elementFromPoint = document.elementFromPoint(205 + x + 20, 55 + y + 20);
+  is(fo, elementFromPoint, 'foreignObject with clip-path');
 
   SimpleTest.finish();
 }

layout/svg/base/src/nsSVGForeignObjectFrame.cpp

@@ -311,7 +311,11 @@ nsSVGForeignObjectFrame::GetFrameForPoint(const nsPoint &aPoint)
   pt = pt * nsPresContext::AppUnitsPerCSSPixel();
   nsPoint point = nsPoint(NSToIntRound(pt.x), NSToIntRound(pt.y));
 
-  return nsLayoutUtils::GetFrameForPoint(kid, point);
+  nsIFrame *frame = nsLayoutUtils::GetFrameForPoint(kid, point);
+  if (frame && nsSVGUtils::HitTestClip(this, aPoint))
+    return frame;
+
+  return nsnull;
 }
 
 NS_IMETHODIMP_(nsRect)