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| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <meta name="viewport" content="width=device-width, initial-scale=1"> |
| 3 <style> |
| 4 html { |
| 5 font-family: Ahem; |
| 6 font-size: 10px; |
| 7 } |
| 8 #testArea { |
| 9 height: 6000px; |
| 10 width: 500px; |
| 11 background: red; |
| 12 } |
| 13 #target { |
| 14 position: fixed; |
| 15 left: 10px; |
| 16 top: 10px; |
| 17 width: 40px; |
| 18 height: 40px; |
| 19 background: yellow; |
| 20 } |
| 21 #frame { |
| 22 display: block; |
| 23 width: 100px; |
| 24 height: 100px; |
| 25 } |
| 26 </style> |
| 27 <div id=testArea> |
| 28 <div id=target></div> |
| 29 <br> |
| 30 <br> |
| 31 <br> |
| 32 <iframe id=frame srcdoc='<div id="innerContent" style="width: 75px; height: 50px
; background: blue"><input></input<div>'></iframe> |
| 33 </div> |
| 34 <p id="description"></p> |
| 35 <div id="console"></div> |
| 36 <script src="../../resources/js-test.js"></script> |
| 37 <script> |
| 38 |
| 39 setPrintTestResultsLazily(); |
| 40 if (window.internals) { |
| 41 window.internals.settings.setViewportEnabled(true); |
| 42 window.internals.settings.setMockScrollbarsEnabled(true); |
| 43 } |
| 44 |
| 45 description("Ensure hit test cache works in correct scenarios of scrolling, dom
and style changes."); |
| 46 |
| 47 function hitTestCountDelta() |
| 48 { |
| 49 var lastCount = 0; |
| 50 if ('lastHitTestCount' in document) |
| 51 lastCount = document.lastHitTestCount; |
| 52 var newCount = internals.hitTestCount(document); |
| 53 document.lastHitTestCount = newCount; |
| 54 return newCount - lastCount; |
| 55 } |
| 56 |
| 57 function hitTestCacheHitsDelta() |
| 58 { |
| 59 var lastCount = 0; |
| 60 if ('lastHitTestCacheHits' in document) |
| 61 lastCount = document.lastHitTestCacheHits; |
| 62 var newCount = internals.hitTestCacheHits(document); |
| 63 document.lastHitTestCacheHits = newCount; |
| 64 return newCount - lastCount; |
| 65 } |
| 66 |
| 67 function clearCounts() |
| 68 { |
| 69 internals.clearHitTestCache(document); |
| 70 document.lastHitTestCount = internals.hitTestCount(document); |
| 71 document.lastHitTestCacheHits = internals.hitTestCacheHits(document); |
| 72 } |
| 73 |
| 74 function checkElementAt(x, y, expectedHitTestCount, expectedHitTestCacheCount) |
| 75 { |
| 76 shouldBe("document.elementFromPoint(" + x + "," + y + ")", |
| 77 "internals.clearHitTestCache(document); internals.elementFromPoint(
document, " + x + ", " + y + ", false, false)"); |
| 78 shouldBeEqualToNumber("hitTestCountDelta()", expectedHitTestCount); |
| 79 shouldBeEqualToNumber("hitTestCacheHitsDelta()", expectedHitTestCacheCount); |
| 80 } |
| 81 |
| 82 function checkChildFrameElementAt(x, y) |
| 83 { |
| 84 shouldBe("internals.elementFromPoint(document, " + x + ", " + y + ", false,
true)", |
| 85 "internals.clearHitTestCache(document); internals.elementFromPoint(
document, " + x + ", " + y + ", false, true)"); |
| 86 } |
| 87 |
| 88 onload = function() { |
| 89 clearCounts(); |
| 90 debug('Hit test main div'); |
| 91 debug('---------------------'); |
| 92 |
| 93 // Verify that the cache is working; the second call |
| 94 // to checkElementAt should end up using the cache from the first call. |
| 95 checkElementAt(60, 60, 2, 0); |
| 96 checkElementAt(60, 60, 2, 1); |
| 97 |
| 98 clearCounts(); |
| 99 debug(''); |
| 100 debug('Hit test fixed div after scroll'); |
| 101 debug('---------------------'); |
| 102 |
| 103 // Verify that after we scroll an element the hit cache isn't used. |
| 104 checkElementAt(12, 12, 2, 0); |
| 105 checkElementAt(10, 60, 2, 0); |
| 106 window.scrollTo(0, 50); |
| 107 checkElementAt(12, 12, 2, 0); |
| 108 |
| 109 clearCounts(); |
| 110 debug(''); |
| 111 debug('Hit test after style change'); |
| 112 debug('---------------------'); |
| 113 checkElementAt(12, 12, 2, 0); |
| 114 document.getElementById('target').style.background = "blue"; |
| 115 checkElementAt(12, 12, 2, 0); |
| 116 |
| 117 clearCounts(); |
| 118 debug(''); |
| 119 debug('Hit test after dom manipulation'); |
| 120 debug('---------------------'); |
| 121 checkElementAt(12, 12, 2, 0); |
| 122 document.getElementById('target').setAttribute("foo", "bar"); |
| 123 checkElementAt(12, 12, 2, 0); |
| 124 |
| 125 clearCounts(); |
| 126 document.getElementById('target').style.display = "none"; |
| 127 window.scrollTo(0, 0); |
| 128 debug(''); |
| 129 debug('Hit test iframe; ensuring child co-ordinates are not in parent cache'
); |
| 130 debug('---------------------'); |
| 131 checkChildFrameElementAt(25, 80); |
| 132 checkChildFrameElementAt(15, 40); |
| 133 |
| 134 finishJSTest(); |
| 135 } |
| 136 </script> |
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Chromium Code Reviews
Issue 1142283004:
Implement a Hit Test Cache. (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master