| <!DOCTYPE html> |
| <script src="../../../../../resources/testharness.js"></script> |
| <script src="../../../../../resources/testharnessreport.js"></script> |
| <script src="../../../../../resources/gesture-util.js"></script> |
| <div style="margin: 0px 0; width: 100px; height: 1000px; background-color: blue;"></div> |
| <script> |
| |
| var EPSILON = 0.001; |
| |
| var t = async_test("Scrolling with a scaled visual viewport"); |
| |
| // This test verifies scrolling of the page while pinch-zoomed in. We ensure |
| // that the scrolls target the correct (visual/layout) viewport and that |
| // bubbling between the two works correctly. |
| window.onload = t.step_func(async function() { |
| await waitForCompositorCommit(); |
| await pinchBy(2, 400, 599, SPEED_INSTANT, GestureSourceType.TOUCHPAD_INPUT); |
| await waitForCompositorCommit(); |
| assert_approx_equals(window.visualViewport.scale, 2.0, EPSILON); |
| assert_approx_equals(window.visualViewport.offsetLeft, 200, EPSILON); |
| assert_approx_equals(window.visualViewport.offsetTop, 300, EPSILON); |
| // We're already within |EPSILON| of the desired offset, but we'll set it |
| // here to avoid rounding issues later in the test. |
| window.internals.setVisualViewportOffset(200, 300); |
| await waitForCompositorCommit(); |
| |
| // Scroll down, this will affect only the layout viewport. |
| await smoothScroll(2, 400, 300, GestureSourceType.TOUCHPAD_INPUT, "down", SPEED_INSTANT); |
| await waitForCompositorCommit(); |
| assert_equals(window.scrollY, 1); |
| |
| // Scroll right, this will affect only the visual viewport. |
| await smoothScroll(2, 400, 300, GestureSourceType.TOUCHPAD_INPUT, "right", SPEED_INSTANT); |
| await waitForCompositorCommit(); |
| assert_equals(window.visualViewport.offsetLeft, 201); |
| |
| // Move the visual viewport up by a pixel so that the next gesture will |
| // bubble. |
| window.internals.setVisualViewportOffset(201, 299); |
| await waitForCompositorCommit(); |
| |
| // Scroll back diagonally. This will affect both viewports by bubbling from |
| // the visual to the layout. |
| await smoothScroll(4, 400, 300, GestureSourceType.TOUCHPAD_INPUT, "downleft", SPEED_INSTANT); |
| await waitForCompositorCommit(); |
| assert_equals(window.scrollY, 2); |
| assert_equals(window.visualViewport.offsetTop, 300); |
| assert_equals(window.visualViewport.offsetLeft, 199); |
| |
| t.done(); |
| }); |
| |
| </script> |
