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Unified Diff: LayoutTests/fast/scroll-behavior/scroll-customization/touch-scroll-customization.html

Issue 1236913004: Expose scroll customization for touch to JS (behind REF). (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master
Patch Set: Change map value to WeakMember, remove Document hack. Created 5 years, 4 months ago
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Index: LayoutTests/fast/scroll-behavior/scroll-customization/touch-scroll-customization.html
diff --git a/LayoutTests/fast/scroll-behavior/scroll-customization/touch-scroll-customization.html b/LayoutTests/fast/scroll-behavior/scroll-customization/touch-scroll-customization.html
new file mode 100644
index 0000000000000000000000000000000000000000..9ff34fc2a444fa9972a3ce71f370b8351d358a73
--- /dev/null
+++ b/LayoutTests/fast/scroll-behavior/scroll-customization/touch-scroll-customization.html
@@ -0,0 +1,252 @@
+<!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");
+ }
+}
+
+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.
+ [0, 0, -65, -55, -45],
+ // a hits its scroll extent on the second last step.
+ [0, 0, 0, 0, -45],
+ // The scrollingElement performs the frame scroll.
+ [0, 0, 0, 0, 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();
+
+ // Consume one pixel of delta per call to applyScroll.
+ for (var i = 0; i < elements.length; ++i) {
+ if (scrollableElements.indexOf(elements[i]) == -1)
+ continue;
+ elements[i].setApplyScroll((function(scrollState) {
+ if (scrollState.deltaY !== 0)
+ scrollState.consumeDelta(0, -1);
+ }).bind(elements[i]), "perform-before-native-scroll");
+ }
+
+ // Scroll five times, with three scrollable elements.
+ // The scroll distance is decreased more the higher up the scroll chain the element is.
+ var cScrollTop = [85 - 1, 100, 100, 100, 100];
+ var aScrollTop = [0, 0, 65 - 2, 100, 100];
+ var scrollingElementScrollTop = [0, 0, 0, 0, 45 - 3];
+ 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);
+ }
+ }, "Consuming deltas prevents scrolling.");
+
+ 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 end and begin 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>
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