| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Scroll customization methods are called appropriately.</title> |
| <script src="../../../resources/testharness.js"></script> |
| <script src="../../../resources/testharnessreport.js"></script> |
| <style> |
| |
| * { |
| margin:0; |
| padding:0; |
| } |
| |
| *::-webkit-scrollbar { |
| width: 0 !important; |
| height: 0 !important; |
| } |
| |
| #a { |
| height:400px; |
| width:400px; |
| overflow:scroll; |
| } |
| |
| #b { |
| height:500px; |
| width:500px; |
| background-color:purple; |
| } |
| |
| #c { |
| height:300px; |
| width:300px; |
| overflow:scroll; |
| } |
| |
| #d { |
| height:400px; |
| width:400px; |
| background-color:green; |
| } |
| |
| body { |
| height:3000px; |
| } |
| |
| </style> |
| </head> |
| <body> |
| |
| <div id="a"> |
| <div id="b"> |
| <div id="c"> |
| <div id="d"> |
| </div> |
| </div> |
| </div> |
| </div> |
| |
| <script> |
| test(function() { |
| assert_true('ScrollState' in window, "'ScrollState' in window"); |
| }, "These tests only work with scroll customization enabled."); |
| |
| internals.settings.setScrollAnimatorEnabled(false); |
| |
| var originalApplyScrolls = []; |
| var originalDistributeScrolls = []; |
| var deltas = [85, 75, 65, 55, 45]; |
| |
| var elements = [ |
| document.getElementById("d"), |
| document.getElementById("c"), |
| document.getElementById("b"), |
| document.getElementById("a"), |
| document.scrollingElement]; |
| |
| var scrollableElements = [elements[1], elements[3], elements[4]]; |
| |
| document.scrollingElement.id = "scrollingElement"; |
| |
| function reset() { |
| for (var i = 0; i < elements.length; ++i) { |
| elements[i].scrollTop = 0; |
| elements[i].unappliedDeltaY = []; |
| elements[i].distributedDeltaY = []; |
| elements[i].numberOfScrollBegins = 0; |
| elements[i].numberOfScrollEnds = 0; |
| |
| elements[i].setApplyScroll((function(scrollState){ |
| if (!scrollState.isEnding && !scrollState.isBeginning) |
| this.unappliedDeltaY.push(scrollState.deltaY); |
| }).bind(elements[i]), "perform-after-native-scroll"); |
| |
| elements[i].setDistributeScroll((function(scrollState) { |
| if (scrollState.isBeginning) |
| this.numberOfScrollBegins++; |
| else if (scrollState.isEnding) |
| this.numberOfScrollEnds++; |
| else |
| this.distributedDeltaY.push(scrollState.deltaY); |
| }).bind(elements[i]), "perform-before-native-scroll"); |
| |
| // Add a gc, to ensure that these callbacks don't get collected. |
| gc(); |
| } |
| } |
| |
| function applyDelta(d) { |
| eventSender.gestureScrollBegin(10, 10); |
| eventSender.gestureScrollUpdate(0, -d); |
| eventSender.gestureScrollEnd(0, 0); |
| } |
| |
| if ('ScrollState' in window) { |
| test(function() { |
| reset(); |
| |
| // Scroll five times, with three scrollable elements. |
| var cScrollTop = [85, 100, 100, 100, 100]; |
| var aScrollTop = [0, 0, 65, 100, 100]; |
| var scrollingElementScrollTop = [0, 0, 0, 0, 45]; |
| |
| for (var i = 0; i < deltas.length; ++i) { |
| applyDelta(deltas[i]); |
| assert_equals(a.scrollTop, aScrollTop[i], "For id 'a' on step " + i); |
| assert_equals(c.scrollTop, cScrollTop[i], "For id 'c' on step " + i); |
| assert_equals(document.scrollingElement.scrollTop, scrollingElementScrollTop[i], "For scrollingElement on step " + i); |
| } |
| }, "Scroll offsets are modified correctly."); |
| |
| test(function() { |
| reset(); |
| |
| // Scroll five times, with five elements. |
| var unapplied = [ |
| // d, the innermost element, never applies any scroll. |
| [85, 75, 65, 55, 45], |
| // c applies the first two scrolls, and then hits its scroll extents. |
| [0, 0, 65, 55, 45], |
| // b doesn't scroll, and so leaves the same deltas unapplied as c. |
| [65, 55, 45], |
| // a hits its scroll extent on the second last step. |
| [0, 0, 45], |
| // The scrollingElement performs the frame scroll. |
| [0]]; |
| |
| for (var i = 0; i < deltas.length; ++i) |
| applyDelta(deltas[i]); |
| |
| for (var i = 0; i < elements.length; ++i) { |
| var el = elements[i]; |
| // Every element sees the same deltas being distributed. |
| assert_array_equals(el.distributedDeltaY, deltas, "distributed delta for " + el.id + ":"); |
| assert_array_equals(el.unappliedDeltaY, unapplied[i], "unapplied delta for " + el.id + ":"); |
| } |
| |
| // Ensure that the document leaves scroll unapplied when appropriate. |
| var documentUnapplied = document.scrollingElement.unappliedDeltaY; |
| applyDelta(4000); |
| assert_equals(documentUnapplied[documentUnapplied.length - 1], 0); |
| applyDelta(4000); |
| assert_equals(documentUnapplied[documentUnapplied.length - 1], 4000); |
| }, "Correct amount of delta is consumed."); |
| |
| test(function() { |
| reset(); |
| |
| // Scroll five times, with three scrollable elements. |
| var cScrollTop = [85, 100, 100, 100, 100]; |
| var aScrollTop = [0, 0, 65, 100, 100]; |
| var scrollingElementScrollTop = [0, 0, 0, 0, 45]; |
| for (var i = 0; i < deltas.length; ++i) { |
| applyDelta(deltas[i]); |
| assert_equals(c.scrollTop, cScrollTop[i], "For id 'c' on step " + i); |
| assert_equals(a.scrollTop, aScrollTop[i], "For id 'a' on step " + i); |
| assert_equals(document.scrollingElement.scrollTop, scrollingElementScrollTop[i], "For scrollingElement on step " + i); |
| } |
| }, "Scroll propagation behaves correctly."); |
| |
| test(function() { |
| reset(); |
| |
| for (var i = 0; i < deltas.length; ++i) |
| applyDelta(deltas[i]); |
| |
| for (var i = 0; i < elements.length; ++i) { |
| assert_equals(elements[i].numberOfScrollBegins, deltas.length, "Incorrect number of begin events for " + elements[i].id); |
| assert_equals(elements[i].numberOfScrollEnds, deltas.length, "Incorrect number of end events for " + elements[i].id); |
| } |
| }, "Correct number of scroll begin and end events observed."); |
| |
| { |
| // NOTE - this async test needs to be run last, as it shares state with the |
| // other tests. If other tests are run after it, they'll modify the state |
| // while this test is still running. |
| var flingTest = async_test("Touchscreen fling doesn't propagate."); |
| reset(); |
| |
| function assertScrollTops(cTop, aTop, scrollingElementTop, step) { |
| assert_equals(c.scrollTop, cTop, "For id 'c' on step " + step); |
| assert_equals(a.scrollTop, aTop, "For id 'a' on step " + step); |
| assert_equals(document.scrollingElement.scrollTop, scrollingElementTop, "For scrollingElement on step " + step); |
| }; |
| |
| var frame_actions = [ |
| function() { |
| eventSender.gestureFlingStart(10, 10, -1000000, -1000000, "touchscreen"); |
| }, |
| flingTest.step_func(function() { |
| assertScrollTops(0, 0, 0, 1); |
| }), |
| flingTest.step_func(function() { |
| assertScrollTops(100, 0, 0, 2); |
| }), |
| flingTest.step_func(function() { |
| assertScrollTops(100, 0, 0, 3); |
| }), |
| flingTest.step_func(function() { |
| assertScrollTops(100, 0, 0, 4); |
| flingTest.done(); |
| }) |
| ] |
| |
| function executeFrameActions(frame_actions) { |
| var frame = 0; |
| function raf() { |
| frame_actions[frame](); |
| frame++; |
| if (frame >= frame_actions.length) |
| return; |
| window.requestAnimationFrame(raf); |
| } |
| window.requestAnimationFrame(raf); |
| } |
| |
| executeFrameActions(frame_actions); |
| } |
| } |
| |
| </script> |
| </body> |
| </html> |