| <!DOCTYPE html> |
| <script src="../../resources/js-test.js"></script> |
| <div id="spanner"></div> |
| <script> |
| var styleCount, layoutCount; |
| |
| setPrintTestResultsLazily(); |
| |
| function assertSyncLayout(sync) { |
| if (window.internals) { |
| styleCount = internals.updateStyleAndReturnAffectedElementCount(); |
| layoutCount = internals.needsLayoutCount(); |
| // scrollTo should have synchronously updated style and layout |
| if (sync) { |
| shouldBe("styleCount", "0"); |
| shouldBe("layoutCount", "0"); |
| } else { |
| shouldNotBe("styleCount", "0"); |
| shouldNotBe("layoutCount", "0"); |
| } |
| } |
| } |
| |
| spanner.style.width = "3000px"; |
| spanner.style.height = "3000px"; |
| scrollTo({ left: 0, top: 1000}); |
| assertSyncLayout(true); |
| shouldBe("window.scrollY", "1000"); |
| |
| scrollTo({ left: 1000, top: 1000}); |
| assertSyncLayout(true); |
| shouldBe("window.scrollX", "1000"); |
| |
| spanner.style.height = "2000px"; |
| scrollTo({ left: 0, top: 0}); |
| assertSyncLayout(false); |
| shouldBe("window.scrollY", "0"); |
| |
| spanner.style.height = "1px"; |
| scrollTo({ left: 0 }); |
| assertSyncLayout(true); |
| |
| spanner.style.height = "2px"; |
| scrollTo({ top: 0 }); |
| assertSyncLayout(true); |
| |
| spanner.style.height = "3px"; |
| scrollTo({ }); |
| assertSyncLayout(true); |
| </script> |
