| <!DOCTYPE html> |
| <script src='../../resources/testharness.js'></script> |
| <script src='../../resources/testharnessreport.js'></script> |
| <script src='../../resources/gesture-util.js'></script> |
| <style> |
| body { |
| margin: 0; |
| } |
| |
| #overflow { |
| border:2px solid black; |
| overflow:auto; |
| white-space:nowrap; |
| height:200px; |
| width:200px; |
| } |
| |
| #container { |
| height: 185px; |
| width: 600px; |
| } |
| |
| .box { |
| height:181px; |
| width:300px; |
| display:inline-block; |
| } |
| </style> |
| |
| <div id="overflow"> |
| <div id="container"> |
| <div class="box" style="background-color:red"></div> |
| <div class="box" style="background-color:green"></div> |
| </div> |
| </div> |
| |
| <script> |
| const scrollDelta = 2; |
| var last_event = null; |
| var source = GestureSourceType.MOUSE_INPUT; |
| const numTicksY = scrollDelta / pixelsPerTick(); |
| const expectedWheelDeltaY = numTicksY * LEGACY_MOUSE_WHEEL_TICK_MULTIPLIER; |
| |
| function mousewheelHandler(e) |
| { |
| last_event = e; |
| } |
| |
| promise_test(async () => { |
| const overflowElement = document.getElementById("overflow"); |
| overflowElement.addEventListener("mousewheel", mousewheelHandler, false); |
| |
| await smoothScroll(scrollDelta, 100, 110, source, 'down', SPEED_INSTANT, false /* precise_scrolling_deltas */, true /* scroll_by_page */); |
| await conditionHolds( () => { |
| return overflowElement.scrollTop == 0; |
| }); |
| assert_equals(last_event.wheelDeltaY, -Math.floor(expectedWheelDeltaY)); |
| assert_equals(last_event.wheelDeltaX, 0); |
| assert_equals(last_event.wheelDelta, -Math.floor(expectedWheelDeltaY)); |
| }, "Page-based wheel scrolls provide correct delta in event handler, don't scroll if there's no " + |
| "overflow in direction when scrolling on div."); |
| </script> |
