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197 lines
6.8 KiB
HTML
197 lines
6.8 KiB
HTML
<!DOCTYPE html>
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<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1/#scroll-snap-type" />
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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div {
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position: absolute;
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}
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.scroller-x {
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overflow: scroll;
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scroll-snap-type: x mandatory;
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width: 500px;
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height: 500px;
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}
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.scroller-y {
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overflow: scroll;
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scroll-snap-type: y mandatory;
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width: 500px;
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height: 500px;
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}
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.space {
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width: 4000px;
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height: 4000px;
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}
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.target {
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scroll-snap-align: start;
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height: 400px;
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width: 400px;
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}
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.large-x {
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width: 3000px;
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background-color: yellow;
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}
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.large-y {
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height: 2000px;
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background-color: yellow;
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}
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.small {
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height: 200px;
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width: 200px;
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background-color: black;
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}
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</style>
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<div class="scroller-x" id="one-target">
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<div class="space"></div>
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<div class="large-x target" id="single" style="left: 200px;"></div>
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</div>
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<div class="scroller-x" id="x">
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<div class="space"></div>
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<div style="left: 200px;">
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<div class="target large-x"></div>
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<div class="target small" style="left: 200px"></div>
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<div class="target small" style="left: 600px"></div>
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<div class="target small" style="left: 1200px"></div>
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</div>
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</div>
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<div class="scroller-y" id="y">
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<div class="space"></div>
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<div style="top: 200px;">
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<div class="target large-y"></div>
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<div class="target small" style="top: 200px"></div>
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<div class="target small" style="top: 600px"></div>
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<div class="target small" style="top: 1200px"></div>
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<div class="target large-y" style="top: 2000px"></div>
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</div>
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</div>
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<div class="scroller-x" id="two-axes" style="scroll-snap-type: both mandatory">
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<div class="space"></div>
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<div class="target large-x" style="top: 200px"></div>
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</div>
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<div class="scroller-x" id="overlapping-overflow" style="scroll-snap-type: both mandatory">
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<div class="space"></div>
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<div style="left: 200px; top: 200px;">
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<div class="target small"></div>
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<div class="target small"></div>
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<div class="target small"></div>
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<div class="target large-y large-x"></div>
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<div class="target small"></div>
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<div class="target small"></div>
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<div class="target small"></div>
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</div>
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</div>
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<script>
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var one_target_scroller = document.getElementById("one-target");
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var scroller_x = document.getElementById("x");
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var scroller_y = document.getElementById("y");
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var two_axes_scroller = document.getElementById("two-axes");
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var overlapping_scroller = document.getElementById("overlapping-overflow");
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test(() => {
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one_target_scroller.scrollTo(10, 0);
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assert_equals(one_target_scroller.scrollLeft, 200);
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assert_equals(one_target_scroller.scrollTop, 0);
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}, "Snaps to the snap position if the snap area doesn't cover the snapport on x.");
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test(() => {
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var right_align = 3200 - one_target_scroller.clientWidth;
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one_target_scroller.scrollTo(right_align, 0);
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assert_equals(one_target_scroller.scrollLeft, right_align);
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assert_equals(one_target_scroller.scrollTop, 0);
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}, "Snaps to the snap position if the snap area covers the snapport on x on the right border.");
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// We use end alignment for this test so that we don't fall on a snap
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// position when the snap area just covers the snapport on the left border.
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test(() => {
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document.getElementById("single").style.scrollSnapAlign = 'end';
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one_target_scroller.scrollTo(200, 0);
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assert_equals(one_target_scroller.scrollLeft, 200);
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assert_equals(one_target_scroller.scrollTop, 0);
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}, "Snaps to the snap position if the snap area covers the snapport on x on the left border.");
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test(() => {
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scroller_x.scrollTo(500, 0);
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assert_equals(scroller_x.scrollLeft, 400);
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assert_equals(scroller_x.scrollTop, 0);
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}, "Snaps if the distance between the previous(400) and next(800) " +
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"snap positions is smaller than snapport(500) on x.");
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test(() => {
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scroller_y.scrollTo(0, 500);
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assert_equals(scroller_y.scrollLeft, 0);
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assert_equals(scroller_y.scrollTop, 400);
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}, "Snaps if the distance between the previous(400) and next(800) " +
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"snap positions is smaller than snapport(500) on y.");
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test(() => {
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scroller_x.scrollTo(900, 0);
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assert_equals(scroller_x.scrollLeft, 900);
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assert_equals(scroller_x.scrollTop, 0);
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}, "Snap to current scroll position which is a valid snap position, " +
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"as the snap area covers snapport on x and the distance between the " +
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"previous(800) and next(1400) is larger than snapport(500).");
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test(() => {
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scroller_y.scrollTo(0, 900);
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assert_equals(scroller_y.scrollLeft, 0);
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assert_equals(scroller_y.scrollTop, 900);
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}, "Snap to current scroll position which is a valid snap position, " +
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"as the snap area covers snapport on y and the distance between the " +
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"previous(800) and next(1400) is larger than snapport(500).");
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test(() => {
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scroller_x.scrollTo(1500, 0);
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assert_equals(scroller_x.scrollLeft, 1500);
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assert_equals(scroller_x.scrollTop, 0);
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}, "Snap to current scroll position which is a valid snap position, as the " +
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"snap area covers snapport on x and there is no subsequent snap positions.");
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test(() => {
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scroller_y.scrollTo(0, 1500);
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assert_equals(scroller_y.scrollLeft, 0);
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assert_equals(scroller_y.scrollTop, 1500);
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}, "Snap to current scroll position which is a valid snap position, as the " +
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"snap area covers snapport on y and there is no subsequent snap positions.");
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test(() => {
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const maxScrollTop = scroller_y.scrollHeight - scroller_y.clientHeight;
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// Scroll to the bottom edge which is a valid snap position that a large
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// target element covers the snapport.
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scroller_y.scrollTo(0, maxScrollTop);
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assert_equals(scroller_y.scrollTop, maxScrollTop);
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// Scroll to `the bottom edge + 1`.
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scroller_y.scrollTo(0, maxScrollTop + 1);
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assert_equals(scroller_y.scrollTop, maxScrollTop);
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}, "Don't snap back even if scrollTo tries to scroll to positions which are " +
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"outside of the scroll range and if a snap target element covers the snaport");
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test(() => {
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two_axes_scroller.scrollTo(10, 100);
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assert_equals(two_axes_scroller.scrollLeft, 10);
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assert_equals(two_axes_scroller.scrollTop, 200);
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}, "Snap to current scroll position on x as the area is covering x axis." +
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"However, we snap to the specified snap position on y as the area is not " +
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"covering y axis.");
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test(() => {
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overlapping_scroller.scrollTo(200, 800);
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assert_equals(overlapping_scroller.scrollLeft, 200);
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assert_equals(overlapping_scroller.scrollTop, 800);
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}, "snap to current scroll position on y as the area is covering y axis, " +
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"even though that area is not the only scroll area at the same position.");
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test(() => {
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overlapping_scroller.scrollTo(800, 200);
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assert_equals(overlapping_scroller.scrollLeft, 800);
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assert_equals(overlapping_scroller.scrollTop, 200);
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}, "snap to current scroll position on x as the area is covering x axis, " +
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"even though that area is not the only scroll area at the same position.");
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</script>
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</script>
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