| Index: LayoutTests/fast/events/hit-test-cache.html
|
| diff --git a/LayoutTests/fast/events/hit-test-cache.html b/LayoutTests/fast/events/hit-test-cache.html
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..9e907838fc86feeb06ac70ed4e9bd31c19b4eefc
|
| --- /dev/null
|
| +++ b/LayoutTests/fast/events/hit-test-cache.html
|
| @@ -0,0 +1,110 @@
|
| +<!DOCTYPE html>
|
| +<meta name="viewport" content="width=device-width, initial-scale=1">
|
| +<style>
|
| +html {
|
| + font-family: Ahem;
|
| + font-size: 10px;
|
| +}
|
| +#testArea {
|
| + height: 6000px;
|
| + width: 500px;
|
| + background: red;
|
| +}
|
| +#target {
|
| + position: fixed;
|
| + left: 10px;
|
| + top: 10px;
|
| + width: 40px;
|
| + height: 40px;
|
| + background: yellow;
|
| +}
|
| +</style>
|
| +<div id=testArea>
|
| + <div id=target></div>
|
| +</div>
|
| +<p id="description"></p>
|
| +<div id="console"></div>
|
| +<script src="../../resources/js-test.js"></script>
|
| +<script>
|
| +setPrintTestResultsLazily();
|
| +if (window.internals) {
|
| + window.internals.settings.setViewportEnabled(true);
|
| + window.internals.settings.setMockScrollbarsEnabled(true);
|
| +}
|
| +
|
| +description("Ensure hit test cache works in correct scenarios of scrolling, dom and style changes.");
|
| +
|
| +function hitTestCountDelta()
|
| +{
|
| + var lastCount = 0;
|
| + if ('lastHitTestCount' in document)
|
| + lastCount = document.lastHitTestCount;
|
| + var newCount = internals.hitTestCount(document);
|
| + document.lastHitTestCount = newCount;
|
| + return newCount - lastCount;
|
| +}
|
| +
|
| +function hitTestCacheHitsDelta()
|
| +{
|
| + var lastCount = 0;
|
| + if ('lastHitTestCacheHits' in document)
|
| + lastCount = document.lastHitTestCacheHits;
|
| + var newCount = internals.hitTestCacheHits(document);
|
| + document.lastHitTestCacheHits = newCount;
|
| + return newCount - lastCount;
|
| +}
|
| +
|
| +function clearCounts()
|
| +{
|
| + internals.clearHitTestCache(document);
|
| + document.lastHitTestCount = internals.hitTestCount(document);
|
| + document.lastHitTestCacheHits = internals.hitTestCacheHits(document);
|
| +}
|
| +
|
| +function checkElementAt(x, y, expectedHitTestCount, expectedHitTestCacheCount)
|
| +{
|
| + shouldBe("document.elementFromPoint(" + x + "," + y + ")",
|
| + "internals.elementFromPointNoCache(document, " + x + ", " + y + ")");
|
| + shouldBeEqualToNumber("hitTestCountDelta()", expectedHitTestCount);
|
| + shouldBeEqualToNumber("hitTestCacheHitsDelta()", expectedHitTestCacheCount);
|
| +}
|
| +
|
| +onload = function() {
|
| + clearCounts();
|
| + debug('Hit test main div');
|
| + debug('---------------------');
|
| +
|
| + // Verify that the cache is working; the second call
|
| + // to checkElementAt should end up using the cache from the first call.
|
| + checkElementAt(60, 60, 2, 0);
|
| + checkElementAt(60, 60, 2, 1);
|
| +
|
| + clearCounts();
|
| + debug('');
|
| + debug('Hit test fixed div after scroll');
|
| + debug('---------------------');
|
| +
|
| + // Verify that after we scroll an element the hit cache isn't used.
|
| + checkElementAt(12, 12, 2, 0);
|
| + checkElementAt(10, 60, 2, 0);
|
| + window.scrollTo(0, 50);
|
| + checkElementAt(12, 12, 2, 0);
|
| +
|
| + clearCounts();
|
| + debug('');
|
| + debug('Hit test after style change');
|
| + debug('---------------------');
|
| + checkElementAt(12, 12, 2, 0);
|
| + document.getElementById('target').style.background = "blue";
|
| + checkElementAt(12, 12, 2, 0);
|
| +
|
| + clearCounts();
|
| + debug('');
|
| + debug('Hit test after dom manipulation');
|
| + debug('---------------------');
|
| + checkElementAt(12, 12, 2, 0);
|
| + document.getElementById('target').setAttribute("foo", "bar");
|
| + checkElementAt(12, 12, 2, 0);
|
| + finishJSTest();
|
| +}
|
| +</script>
|
|
|
Chromium Code Reviews
Issue 1142283004:
Implement a Hit Test Cache. (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master