third_party/WebKit/LayoutTests/fast/shapes/shape-outside-floats/shape-outside-floats-ellipse-margin-left.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4 <script src="../../../resources/js-test.js"></script>
   5 <script src="../resources/subpixel-utils.js"></script>
   6 <style>
   7 #container-border {
   8     border: 1px solid black;
   9     margin: 10px;
  10     width: 500px;
  11 }
  12
  13 #container {
  14     font: 20px/1 Ahem, sans-serif;
  15     width: 500px;
  16     height: 300px;
  17   }
  18
  19 #float-left {
  20     float: left;
  21     position: relative;
  22     overflow: visible;
  23     shape-outside: ellipse(200px 100px at 225px 125px);
  24     shape-margin: 25px;
  25     width: 450px;
  26     height: 250px;
  27 }
  28
  29 #svg-shape-ellipse {
  30     position: absolute;
  31     display:block;
  32     top: 0px;
  33     left: 0px;
  34     width: 500px;
  35     height: 300px;
  36 }
  37 </style>
  38
  39 <body>
  40 <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>
  41 <div id="container-border">
  42     <div id="container">
  43         <div id="float-left">
  44             <svg id="svg-shape-ellipse" xmlns="http://www.w3.org/2000/">
  45                 <ellipse cx="225" cy="125" rx="200" ry="100" fill="green"></ellipse>
  46                 <ellipse cx="225" cy="125" rx="225" ry="125" fill="none" stroke="green"></ellipse>
  47             </svg>
  48         </div>
  49         <span id="s1">X</span></br><span id="s2">X</span><br/><span id="s3">X</span>
  50     </div>
  51 </div>
  52 <div id="console"></div>
  53 </body>
  54 <script>
  55 function elementRect(elementId)
  56 {
  57     var s = document.getElementById("container").getBoundingClientRect();
  58     var r = document.getElementById(elementId).getBoundingClientRect();
  59     return {left: r.left - s.left, top: r.top - s.top, width: r.width, height: r.height};
  60 }
  61
  62 // You'll find the equation for the X intercept of an elliptical arc here (among other places):
  63 // http://hansmuller-webkit.blogspot.com/2012/07/computing-horizonal-rounded-rectangle.html
  64
  65 function marginEllipseLeftXIntercept(y, cx, rx, ry)
  66 {
  67     var f = SubPixelLayout.snapToLayoutUnit(cx + rx * Math.sqrt(1 - Math.pow((ry - y) / ry, 2)));
  68     return String( Math.round(f) );
  69 }
  70
  71 // In the ".left" tests below, it's the lower edge of the 20px Ahem glyph that that defines the element rect's left edge.
  72 // That's why the Y coordinate in each of those tests is 20 greater than the ".top" test.
  73
  74 var quiet = true; // PASS output depends on SubPixelLayout.isEnabled()
  75
  76 shouldBe("elementRect('s1').top", "0");
  77 shouldBe("elementRect('s1').left", marginEllipseLeftXIntercept(20, 225, 225, 125), quiet);
  78
  79 shouldBe("elementRect('s2').top", "20");
  80 shouldBe("elementRect('s2').left", marginEllipseLeftXIntercept(40, 225, 225, 125), quiet);
  81
  82 shouldBe("elementRect('s3').top", "40");
  83 shouldBe("elementRect('s3').left", marginEllipseLeftXIntercept(60, 225, 225, 125), quiet);
  84
  85 </script>
  86 </html>
  87