88 lines
2.7 KiB
HTML
88 lines
2.7 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<script src="../../../resources/js-test-pre.js"></script>
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<script src="../resources/subpixel-utils.js"></script>
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<style>
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#container-border {
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border: 1px solid black;
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margin: 10px;
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width: 500px;
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}
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#container {
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font: 20px/1 Ahem, sans-serif;
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width: 500px;
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height: 300px;
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}
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#float-left {
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float: left;
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position: relative;
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overflow: visible;
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-webkit-shape-outside: ellipse(200px 100px at 225px 125px);
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-webkit-shape-margin: 25px;
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width: 450px;
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height: 250px;
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}
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#svg-shape-ellipse {
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position: absolute;
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display:block;
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top: 0px;
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left: 0px;
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width: 500px;
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height: 300px;
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}
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</style>
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<body>
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<p>The left edges of the three black squares should follow the outer ellipse boundary and each square should appear on a subsequent line.</p>
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<div id="container-border">
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<div id="container">
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<div id="float-left">
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<svg id="svg-shape-ellipse" xmlns="http://www.w3.org/2000/">
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<ellipse cx="225" cy="125" rx="200" ry="100" fill="green"></ellipse>
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<ellipse cx="225" cy="125" rx="225" ry="125" fill="none" stroke="green"></ellipse>
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</svg>
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</div>
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<span id="s1">X</span></br><span id="s2">X</span><br/><span id="s3">X</span>
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</div>
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</div>
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<div id="console"></div>
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</body>
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<script>
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function elementRect(elementId)
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{
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var s = document.getElementById("container").getBoundingClientRect();
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var r = document.getElementById(elementId).getBoundingClientRect();
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return {left: Math.round(r.left) - Math.round(s.left), top: Math.round(r.top) - Math.round(s.top), width: Math.round(r.width), height: Math.round(r.height)};
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}
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// You'll find the equation for the X intercept of an elliptical arc here (among other places):
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// http://hansmuller-webkit.blogspot.com/2012/07/computing-horizonal-rounded-rectangle.html
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function marginEllipseLeftXIntercept(y, cx, rx, ry)
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{
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var f = SubPixelLayout.snapToLayoutUnit(cx + rx * Math.sqrt(1 - Math.pow((ry - y) / ry, 2)));
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return String( Math.round(f) );
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}
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// In the ".left" tests below, it's the lower edge of the 20px Ahem glyph that that defines the element rect's left edge.
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// That's why the Y coordinate in each of those tests is 20 greater than the ".top" test.
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var quiet = true; // PASS output depends on SubPixelLayout.isEnabled()
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shouldBe("elementRect('s1').top", "0");
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shouldBe("elementRect('s1').left", marginEllipseLeftXIntercept(20, 225, 225, 125), quiet);
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shouldBe("elementRect('s2').top", "20");
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shouldBe("elementRect('s2').left", marginEllipseLeftXIntercept(40, 225, 225, 125), quiet);
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shouldBe("elementRect('s3').top", "40");
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shouldBe("elementRect('s3').left", marginEllipseLeftXIntercept(60, 225, 225, 125), quiet);
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</script>
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</html>
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