| <!DOCTYPE html> |
| <html> |
| |
| <head> |
| <meta charset="utf-8"> |
| <title>CSS Test: scroll tracking for ::scroll-markers whose orignatin elements cannot be scroll-aligned </title> |
| <link rel="help" href="https://drafts.csswg.org/css-overflow-5/#scroll-container-scroll"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/testdriver.js"></script> |
| <script src="/resources/testdriver-actions.js"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script src="/css/css-transitions/support/helper.js"></script> |
| <script src="/dom/events/scrolling/scroll_support.js"></script> |
| <script src="support/scroll-marker-support.js"></script> |
| </head> |
| |
| <body> |
| <style> |
| .wrapper { |
| display: grid; |
| justify-content: center; |
| } |
| |
| .carousel { |
| display: grid; |
| grid-auto-flow: column; |
| width: 1600px; |
| height: 512px; |
| overflow-x: scroll; |
| scroll-snap-type: x mandatory; |
| list-style-type: none; |
| scroll-behavior: smooth; |
| border: solid 2px grey; |
| padding-top: 10%; |
| text-align: center; |
| counter-set: markeridx -1; |
| |
| div>.item { |
| &>.itemchild { |
| |
| } |
| scroll-snap-align: center; |
| height: 80%; |
| width: 318px; |
| border: 1px solid; |
| place-content: center; |
| |
| &::scroll-marker { |
| content: counter(markeridx); |
| counter-increment: markeridx; |
| align-content: center; |
| text-align: center; |
| width: 35px; |
| height: 35px; |
| border: 3px solid gray; |
| border-radius: 50%; |
| margin: 3px; |
| background-color: red; |
| } |
| |
| &::scroll-marker:target-current { |
| background-color: green; |
| } |
| &::scroll-marker:checked { |
| background-color: green; |
| } |
| } |
| |
| scroll-marker-group: after; |
| |
| &::scroll-marker-group { |
| height: 45px; |
| display: flex; |
| align-items: center; |
| justify-content: center; |
| border: solid 1px black; |
| border-radius: 30px; |
| } |
| } |
| </style> |
| <div class="wrapper" id="wrapper"> |
| <div class="carousel" id="carousel"> |
| <div> |
| <div class="item" id="item0" tabindex=0> |
| <div class="itemchild" id="itemchild0">0</div> |
| </div> |
| <div class="itemsibling" id="itemsibling0"></div> |
| </div> |
| <div> |
| <div class="item" id="item1" tabindex=0> |
| <div class="itemchild" id="itemchild1">1</div> |
| </div> |
| <div class="itemsibling" id="itemsibling1"></div> |
| </div> |
| <div> |
| <div class="item" id="item2" tabindex=0> |
| <div class="itemchild" id="itemchild2">2</div> |
| </div> |
| <div class="itemsibling" id="itemsibling2"></div> |
| </div> |
| <div> |
| <div class="item" id="item3" tabindex=0> |
| <div class="itemchild" id="itemchild3">3</div> |
| </div> |
| <div class="itemsibling" id="itemsibling3"></div> |
| </div> |
| <div> |
| <div class="item" id="item4" tabindex=0> |
| <div class="itemchild" id="itemchild4">4</div> |
| </div> |
| <div class="itemsibling" id="itemsibling4"></div> |
| </div> |
| <div> |
| <div class="item" id="item5" tabindex=0> |
| <div class="itemchild" id="itemchild5">5</div> |
| </div> |
| <div class="itemsibling" id="itemsibling5"></div> |
| </div> |
| <div> |
| <div class="item" id="item6" tabindex=0> |
| <div class="itemchild" id="itemchild6">6</div> |
| </div> |
| <div class="itemsibling" id="itemsibling6"></div> |
| </div> |
| <div> |
| <div class="item" id="item7" tabindex=0> |
| <div class="itemchild" id="itemchild7">7</div> |
| </div> |
| <div class="itemsibling" id="itemsibling7"></div> |
| </div> |
| <div> |
| <div class="item" id="item8" tabindex=0> |
| <div class="itemchild" id="itemchild8">8</div> |
| </div> |
| <div class="itemsibling" id="itemsibling8"></div> |
| </div> |
| <div> |
| <div class="item" id="item9" tabindex=0> |
| <div class="itemchild" id="itemchild9">9</div> |
| </div> |
| <div class="itemsibling" id="itemsibling9"></div> |
| </div> |
| <div> |
| <div class="item" id="item10" tabindex=0> |
| <div class="itemchild" id="itemchild10">10</div> |
| </div> |
| <div class="itemsibling" id="itemsibling10"></div> |
| </div> |
| <div> |
| <div class="item" id="item11" tabindex=0> |
| <div class="itemchild" id="itemchild11">11</div> |
| </div> |
| <div class="itemsibling" id="itemsibling11"></div> |
| </div> |
| <div> |
| <div class="item" id="item12" tabindex=0> |
| <div class="itemchild" id="itemchild12">12</div> |
| </div> |
| <div class="itemsibling" id="itemsibling12"></div> |
| </div> |
| <div> |
| <div class="item" id="item13" tabindex=0> |
| <div class="itemchild" id="itemchild13">13</div> |
| </div> |
| <div class="itemsibling" id="itemsibling13"></div> |
| </div> |
| <div> |
| <div class="item" id="item14" tabindex=0> |
| <div class="itemchild" id="itemchild14">14</div> |
| </div> |
| <div class="itemsibling" id="itemsibling14"></div> |
| </div> |
| <div> |
| <div class="item" id="item15" tabindex=0> |
| <div class="itemchild" id="itemchild15">15</div> |
| </div> |
| <div class="itemsibling" id="itemsibling15"></div> |
| </div> |
| </div> |
| </div> |
| <script> |
| |
| const carousel = document.getElementById("carousel"); |
| const items = document.querySelectorAll(".item"); |
| const wrapper = document.getElementById("wrapper"); |
| |
| RED = "rgb(255, 0, 0)"; |
| GREEN = "rgb(0, 128, 0)"; |
| |
| const max_scroll_offset = carousel.scrollWidth - carousel.clientWidth; |
| async function testTargetedHasActiveMarker(test, element, expected_idx) { |
| // Start from somewhere in the middle, ensuring that scrolling to the |
| // extremes generates scrollend events. |
| await waitForScrollReset(test, carousel, max_scroll_offset / 2); |
| const color = |
| getComputedStyle(items[expected_idx], "::scroll-marker").backgroundColor; |
| assert_not_equals(color, GREEN, |
| `Target item ${expected_idx} is not selected yet.`); |
| const scrollend_promise = waitForScrollendEventNoTimeout(carousel); |
| element.scrollIntoView({behavior: "smooth"}); |
| await scrollend_promise; |
| verifySelectedMarker(expected_idx, items, GREEN, RED); |
| } |
| |
| promise_test(async(t) => { |
| // Item 1 cannot be snap-aligned because there is not enough |
| // room for its scroll container to be aligned to its center. |
| const target_item = items[1]; |
| await testTargetedHasActiveMarker(t, target_item, 1); |
| }, "scroll-marker of target (idx 1) of scrollIntoView is selected"); |
| |
| promise_test(async(t) => { |
| // Item 14 cannot be snap-aligned because there is not enough |
| // room for its scroll container to be aligned to its center. |
| const target_item = items[14]; |
| await testTargetedHasActiveMarker(t, target_item, 14); |
| }, "scroll-marker of target (idx 14) of scrollIntoView is selected"); |
| |
| promise_test(async(t) => { |
| const item14 = items[14]; |
| const target_item = item14.querySelector(".itemchild"); |
| // Item 14 is the parent. We call scrollIntoView on its child. |
| await testTargetedHasActiveMarker(t, target_item, 14); |
| }, "scroll-marker of parent of target of scrollIntoView is selected"); |
| |
| promise_test(async(t) => { |
| const item14 = items[14]; |
| const target_item = item14.nextElementSibling; |
| // Item 14 is before itemsibling14 in the DOM. We call scrollIntoView on |
| // itemsibling14. |
| await testTargetedHasActiveMarker(t, target_item, 14); |
| }, "scroll-marker of earlier sibling of target of scrollIntoView is selected"); |
| </script> |
| </body> |
| |
| </html> |
