| <!DOCTYPE html> |
| <script src='../../resources/gesture-util.js'></script> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <!-- This div is 200 pixels high. The content results in scrool bars on |
| both edges, resulting in an effective content area of 185 x 185 on |
| linux. The paging context overlap is 24 pixels. So one page of scroll |
| moves the content by 185 - 24 -= 161 pixels. --> |
| <div id="overflow" style="border:2px solid black;overflow:auto;height:200px;width:200px;"> |
| <div style="height:300px;width:600px"> |
| <div style="background-color:red;height:300px;width:300px;position:relative;left:0px;top:0px"></div> |
| <div style="background-color:green;height:300px;width:300px;position:relative;left:300px;top:-300px"></div> |
| </div> |
| <div style="height:300px;width:600px"> |
| <div style="background-color:blue;height:300px;width:300px;position:relative;left:0px;top:0px"></div> |
| <div style="background-color:yellow;height:300px;width:300px;position:relative;left:300px;top:-300px"></div> |
| </div> |
| </div> |
| |
| <script> |
| var givenScrollTop = 1; |
| var givenScrollLeft = 2; |
| var expectedScrollTop = 161; |
| var expectedScrollLeft = 161; |
| var last_event = null; |
| var source = GestureSourceType.MOUSE_INPUT; |
| const numTicksX = givenScrollLeft / pixelsPerTick(); |
| const numTicksY = givenScrollTop / pixelsPerTick(); |
| const expectedWheelDeltaX = numTicksX * LEGACY_MOUSE_WHEEL_TICK_MULTIPLIER; |
| const expectedWheelDeltaY = numTicksY * LEGACY_MOUSE_WHEEL_TICK_MULTIPLIER; |
| |
| function mousewheelHandler(e) |
| { |
| assert_equals(last_event, null); |
| last_event = e; |
| } |
| |
| promise_test(async () => { |
| var overflowElement = document.getElementById("overflow"); |
| overflowElement.addEventListener("mousewheel", mousewheelHandler, false); |
| var ele_center = elementCenter(overflowElement); |
| // Wheel event will scroll by one page |
| await smoothScrollWithXY(givenScrollLeft, givenScrollTop, ele_center.x, ele_center.y, source, SPEED_INSTANT, false, true); |
| await waitFor( () => { |
| return overflowElement.scrollLeft == window.expectedScrollLeft && |
| overflowElement.scrollTop == window.expectedScrollTop; |
| }); |
| |
| // When a user operates the device for scrolling to down, wheelDeltaX is negative, otherwise positive. |
| // https://developer.mozilla.org/en-US/docs/Web/API/Element/mousewheel_event. |
| assert_equals(last_event.wheelDeltaX, -Math.floor(expectedWheelDeltaX)); |
| assert_equals(last_event.wheelDeltaY, -Math.floor(expectedWheelDeltaY)); |
| assert_equals(last_event.wheelDelta, -Math.floor(expectedWheelDeltaY)); |
| }, 'This test checks one page of scroll on both x and y on div moves the content by 87.5% of the scroller size.'); |
| </script> |
