126 lines
No EOL
4.1 KiB
HTML
126 lines
No EOL
4.1 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title> CSS Scroll Snap 2 Test: scroll-initial-target*</title>
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<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-2/#scroll-initial-target">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/resources/testdriver.js"></script>
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<script src="/resources/testdriver-actions.js"></script>
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<script src="/resources/testdriver-vendor.js"></script>
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<script src="/dom/events/scrolling/scroll_support.js"></script>
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</head>
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<body>
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<style>
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.spacer {
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width: 1000px;
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height: 1000px;
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}
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.scroller {
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width: 300px;
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height: 300px;
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border: solid 1px black;
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overflow: scroll;
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margin: 0px;
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position: absolute;
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}
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.box {
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position: absolute;
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width: 200px;
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height: 200px;
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}
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.top_left {
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top: 0px;
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left: 0px;
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background-color: red;
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}
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.center {
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top: 200px;
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left: 200px;
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background-color: purple;
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scroll-initial-target: nearest;
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}
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.bottom_right {
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top: 400px;
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left: 400px;
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background-color: yellow;
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}
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</style>
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<div class="scroller" id="user_scroller">
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<div class="spacer"></div>
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<div class="top_left box" id="user_top_left_box"></div>
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<div class="center box"></div>
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<div class="bottom_right box"></div>
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</div>
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<div class="scroller" id="programmatic_scroller" style="left: 500px">
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<div class="spacer"></div>
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<div class="top_left box" id="programmatic_top_left_box"></div>
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<div class="center box"></div>
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<div class="bottom_right box"></div>
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</div>
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<script>
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async function user_scroll(scroller, current_offset, target_offset) {
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return new test_driver.Actions().scroll(0, 0,
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target_offset.x - current_offset.x,
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target_offset.y - current_offset.y, { origin: scroller })
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.send();
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}
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function programmatic_scroll(scroller, current_offset, target_offset) {
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scroller.scrollTo(target_offset.x, target_offset.y);
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}
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async function test_scroll_initial_target(test, scroller, msg, scrolling_function) {
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await waitForCompositorCommit();
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let top_left_box = document.getElementById("user_top_left_box");
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let expected_scroll_top = top_left_box.getBoundingClientRect().height;
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let expected_scroll_left = top_left_box.getBoundingClientRect().width;
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assert_approx_equals(scroller.scrollTop, expected_scroll_top, 1,
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"scroll-initial-target sets initial vertical scroll position");
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assert_approx_equals(scroller.scrollLeft, expected_scroll_left, 1,
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"scroll-initial-target sets initial horizontal scroll position");
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let scrollend_promise = new Promise((resolve) => {
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scroller.addEventListener("scrollend", resolve);
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});
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const current_offset = { x: scroller.scrollLeft, y: scroller.scrollTop };
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const target_offset = {
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x: current_offset.x + 100,
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y: current_offset.y + 100
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};
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await scrolling_function(scroller, current_offset, target_offset);
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// Only wait for scrollend if it is supported.
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if (window.onscrollend == null || window.onscrollend != undefined) {
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await scrollend_promise;
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}
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assert_approx_equals(scroller.scrollTop, target_offset.y, 1,
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`${msg} (vertical)`);
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assert_approx_equals(scroller.scrollLeft, target_offset.x, 1,
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`${msg} (horizontal)`);
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}
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promise_test(async (t) => {
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let scroller = document.getElementById("user_scroller");
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const msg = "user scroll is not overriden in by scroll-initial-target";
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await test_scroll_initial_target(t, scroller, msg, user_scroll);
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}, "scroll-initial-target does not override user scroll");
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promise_test(async (t) => {
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let scroller = document.getElementById("programmatic_scroller");
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const msg =
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"programmatic scroll is not overriden in by scroll-initial-target";
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await test_scroll_initial_target(t, scroller, msg, programmatic_scroll);
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}, "scroll-initial-target does not override programmatic scroll");
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</script>
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</body> |