| <!DOCTYPE HTML> |
| <body style="width:30000px;height:30000px" onload="runTest()"> |
| </body> |
| |
| <script src="../../resources/js-test.js"></script> |
| <script> |
| description("Verifies that document scrolling supports fractional offset."); |
| |
| var floatPrecision = 0.00001; |
| var useIntegerScrollOffset = false; |
| function checkScrollOffset(offset_x, offset_y) |
| { |
| if (useIntegerScrollOffset) { |
| offset_x = Math.floor(offset_x); |
| offset_y = Math.floor(offset_y); |
| } |
| shouldBeCloseTo('document.scrollingElement.scrollTop', offset_y, floatPrecision); |
| shouldBeCloseTo('document.scrollingElement.scrollLeft', offset_x, floatPrecision); |
| } |
| |
| function scroll() |
| { |
| window.scrollTo(0, 0); |
| eventSender.gestureScrollBegin(100.1, 300.2); |
| checkScrollOffset(0, 0); |
| eventSender.gestureScrollUpdate(-20.5, -10.2); |
| checkScrollOffset(20.5, 10.2); |
| eventSender.gestureScrollUpdate(10.9, -20.9); |
| checkScrollOffset(9.6, 31.1); |
| eventSender.gestureScrollUpdate(100.4, 220.9); |
| checkScrollOffset(0.0, 0.0); |
| eventSender.gestureScrollEnd(0, 0); |
| } |
| |
| function runTest() |
| { |
| if (window.eventSender) { |
| debug("set PreferCompositingToLCDTextEnabled true"); |
| window.internals.settings.setPreferCompositingToLCDTextEnabled(true); |
| scroll(); |
| |
| debug("set PreferCompositingToLCDTextEnabled false"); |
| window.internals.settings.setPreferCompositingToLCDTextEnabled(false); |
| useIntegerScrollOffset = true; |
| scroll(); |
| } |
| } |
| |
| </script> |
| </html> |
