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+<html xmlns="http://www.w3.org/1999/xhtml">
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1486952
+-->
+<head>
+ <title>Test that hit-testing works after a viewBox update</title>
+
+ <style>
+ :hover { fill: lime; }
+ </style>
+
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+
+<body onload="run()">
+<script class="testbody" type="text/javascript">
+<![CDATA[
+
+SimpleTest.waitForExplicitFinish();
+
+function run() {
+ const div = $("div");
+ const offsetX = div.offsetLeft;
+ const offsetY = div.offsetTop;
+ const outerRect = $("outerRect");
+ const innerRect = $("innerRect");
+ const outerSVG = $("outerSVG");
+ const innerSVG = $("innerSVG");
+ let got;
+
+ // Update the inner SVG viewBox to "move" the inner rectangle off its current
+ // position on screen:
+ innerSVG.setAttribute("viewBox", "-25 0 50 50");
+ got = document.elementFromPoint(offsetX + 150, offsetY + 25);
+ is(got, innerRect, "Should hit inner rectangle (1)");
+
+ // Update the inner SVG viewBox again. (At the time of writing, a reflow is
+ // triggered the first time you change viewBox on an inner svg, so the
+ // previous test is expected to always pass. This next test will fail if we're
+ // updating overflows on the inner svg frame instead of its children).
+ innerSVG.setAttribute("viewBox", "0 -25 50 50");
+ got = document.elementFromPoint(offsetX + 100, offsetY + 75);
+ is(got, innerRect, "Should hit inner rectangle (2)");
+
+ // Now update the outer SVG viewBox and confirm that both rectangles are
+ // registered. (Note that in this case the overflow rectangle of the inner
+ // svg is the inner svg's viewport, so be sure to "move" the outer svg so that
+ // the "new" outer rectangle and inner svg are off the current outerRect
+ // union inner svg viewport - hit testing still works in that union.)
+ outerSVG.setAttribute("viewBox", "-200 0 400 100");
+ // Outer:
+ got = document.elementFromPoint(offsetX + 250, offsetY + 50);
+ is(got, outerRect, "Should hit outer rectangle");
+ // Inner:
+ got = document.elementFromPoint(offsetX + 300, offsetY + 75);
+ is(got, innerRect, "Should hit inner rectangle (3)");
+
+ SimpleTest.finish();
+}
+
+]]>
+</script>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1486952">Mozilla Bug 1486952</a>
+<p id="display"></p>
+<div id="content">
+
+ <div width="100%" height="1" id="div"></div>
+ <svg xmlns="http://www.w3.org/2000/svg" id="outerSVG" width="400" height="100"
+ viewBox="0 0 400 100">
+ <rect x="25" y="25" width="50" height="50" fill="red" id="outerRect" />
+ <svg x="75" width="100" height="100" viewBox="0 0 50 50" id="innerSVG">
+ <rect width="25" height="25" fill="red" id="innerRect" />
+ </svg>
+ </svg>
+
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>