tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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snap-inline-block.html (3662B)

      1 <!DOCTYPE html>
      2 <link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1/#scroll-snap-type" />
      3 <script src="/resources/testharness.js"></script>
      4 <script src="/resources/testharnessreport.js"></script>
      5 <style>
      6 div {
      7  position: absolute;
      8  margin: 0px;
      9 }
     10 #scroller {
     11  width: 400px;
     12  height: 350px;
     13  overflow: scroll;
     14  scroll-snap-type: both mandatory;
     15 }
     16 #space {
     17  width: 1000px;
     18  height: 1000px;
     19 }
     20 #target {
     21  width: 200px;
     22  height: 200px;
     23  left: 300px;
     24  top: 300px;
     25 }
     26 </style>
     27 
     28 <div id="scroller">
     29  <div id="space"></div>
     30  <div id="target"></div>
     31 </div>
     32 
     33 <script>
     34 const scroller_width = scroller.clientWidth;
     35 const scroller_height = scroller.clientHeight;
     36 [
     37  ["horizontal-tb", 300,                  500 - scroller_height],
     38  ["vertical-lr",   500 - scroller_width, 300],
     39  ["vertical-rl",   scroller_width - 700, 300]
     40 ].forEach(([writing_mode, left, top]) => {
     41  test(() => {
     42    const target_left = getComputedStyle(target).left;
     43    scroller.style.writingMode = writing_mode;
     44    target.style.scrollSnapAlign = "end start";
     45    if (writing_mode == "vertical-rl") {
     46      target.style.left = (scroller_width - 700) + "px";
     47      scroller.scrollTo(-500, 0);
     48    } else {
     49      scroller.scrollTo(0, 0);
     50    }
     51    assert_equals(scroller.scrollLeft, left, "aligns correctly on x");
     52    assert_equals(scroller.scrollTop, top, "aligns correctly on y");
     53    target.style.left = target_left;
     54    scroller.style.writingMode = "";
     55  }, "Snaps correctly for " + writing_mode +
     56     " writing mode with 'scroll-snap-align: end start' alignment");
     57 });
     58 
     59 [
     60  ["horizontal-tb", 500 - scroller_width,     300],
     61  ["vertical-lr",   300,                      500 - scroller_height],
     62  ["vertical-rl",   target.clientWidth - 700, 500 - scroller_height]
     63 ].forEach(([writing_mode, left, top]) => {
     64  test(() => {
     65    const target_left = getComputedStyle(target).left;
     66    scroller.style.writingMode = writing_mode;
     67    target.style.scrollSnapAlign = "start end";
     68    if (writing_mode == "vertical-rl") {
     69      target.style.left = (scroller_width - 700) + "px";
     70      scroller.scrollTo(-500, 0);
     71    } else {
     72      scroller.scrollTo(0, 0);
     73    }
     74    assert_equals(scroller.scrollLeft, left, "aligns correctly on x");
     75    assert_equals(scroller.scrollTop, top, "aligns correctly on y");
     76    target.style.left = target_left;
     77    scroller.style.writingMode = "";
     78  }, "Snaps correctly for " + writing_mode +
     79     " writing mode with 'scroll-snap-align: start end' alignment");
     80 });
     81 
     82 test(() => {
     83  const target_left = getComputedStyle(target).left;
     84  scroller.style.direction = "rtl";
     85  target.style.scrollSnapAlign = "end start";
     86  target.style.left = (scroller_width - 700) + "px";
     87 
     88  scroller.scrollTo(-500, 0);
     89  assert_equals(scroller.scrollLeft, target.clientWidth - 700,
     90                "aligns correctly on x");
     91  assert_equals(scroller.scrollTop, 500 - scroller_height,
     92                "aligns correctly on y");
     93 
     94  target.style.left = target_left;
     95  scroller.style.direction = "";
     96 }, "Snaps correctly for 'direction: rtl' with 'scroll-snap-align: end start' " +
     97   "alignment");
     98 
     99 test(() => {
    100  const target_left = getComputedStyle(target).left;
    101  scroller.style.direction = "rtl";
    102  target.style.scrollSnapAlign = "start end";
    103  target.style.left = (scroller_width - 700) + "px";
    104 
    105  scroller.scrollTo(-500, 0);
    106  assert_equals(scroller.scrollLeft, scroller_width - 700,
    107                "aligns correctly on x");
    108  assert_equals(scroller.scrollTop, 300, "aligns correctly on y");
    109 
    110  target.style.left = target_left;
    111  scroller.style.direction = "";
    112 }, "Snaps correctly for 'direction: rtl' with 'scroll-snap-align: start end' " +
    113   "alignment");
    114 
    115 </script>