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