1 (function() { 2 function createElement(tag, parent, className, id) { 3 var el = document.createElement(tag); 4 el.className = className; 5 if (id) 6 el.id = id; 7 parent.appendChild(el); 8 return el; 9 } 10 11 function createSet(width, height, nested) { 12 var container = createElement("div", document.body, "container"); 13 for (var y = 0; y < height; ++y) { 14 for (var x = 0; x < width; ++x) 15 createElement("div", container, "float", "float" + x + "_" + y); 16 17 var nestedContainer = container; 18 for ( ; nested > 0; --nested) 19 nestedContainer = createElement("div", nestedContainer, "nested", "nested" + x + "_" + nested); 20 21 createElement("div", container, "float-end", "end" + x) 22 } 23 return container; 24 } 25 26 function toggle(str, str1, str2) { 27 return str == str1 ? str2 : str1; 28 } 29 30 function resetTest() { 31 PerfTestRunner.resetRandomSeed(); 32 var list = document.querySelectorAll(".float.big"); 33 for (var i = 0; i < list.length; ++i) 34 list[i].className = "float"; 35 } 36 37 function createTestFunction(width, height, nested, runs) { 38 var container = createSet(width, height, nested); 39 nested = nested || 0; 40 runs = runs || 10; 41 return function() { 42 container.style.display = "block"; 43 for (var i = 0; i < runs; ++i) { 44 var x = Math.floor(Math.random() * width); 45 var y = Math.floor(Math.random() * height); 46 var el = document.getElementById("float" + x + "_" + y); 47 el.className = toggle(el.className, "float", "float big"); 48 // Force a layout. 49 container.clientHeight; 50 } 51 resetTest(); 52 container.style.display = "none"; 53 } 54 } 55 56 window.createFloatsLayoutTestFunction = createTestFunction; 57 })(); 58
