css/css-layout-api/edges/scrollbar.https.html

<!DOCTYPE html>
<html class=reftest-wait>
<link rel="help" href="https://drafts.css-houdini.org/css-layout-api/#dom-layoutedges">
<link rel="match" href="scrollbar-ref.html">
<meta name="assert" content="This test checks that scrollbar sizes are passed to the layout correctly." />
<style>
td { text-align: center; }

.parent {
  box-sizing: border-box;
  width: 50px;
  height: 50px;
  border: solid;
  position: relative;
  background: red;
}

@supports (display: layout(test)) {
  .parent {
    display: layout(test);
    background: initial;
  }
}

.child {
  width: 10px;
  height: 10px;
  background: green;
}
</style>
<!--
  This test works by placing four children in each corner of the layout using the edges.
  The reference to this test uses absolute positioning to achieve the same effect.
-->
<table>
  <tr>
    <td></td>
    <td colspan=2>LTR</td>
    <td colspan=2>RTL</td>
  </tr>
  <tr>
    <td></td>
    <td>Y</td>
    <td>X</td>
    <td>Y</td>
    <td>X</td>
  </tr>
  <tr>
    <td>HTB</td>
    <td>
      <div class="parent" style="writing-mode: horizontal-tb; direction: ltr; overflow-y: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
    <td>
      <div class="parent" style="writing-mode: horizontal-tb; direction: ltr; overflow-x: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
    <td>
      <div class="parent" style="writing-mode: horizontal-tb; direction: rtl; overflow-y: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
    <td>
      <div class="parent" style="writing-mode: horizontal-tb; direction: rtl; overflow-x: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
  </tr>
  <tr>
    <td>VRL</td>
    <td>
      <div class="parent" style="writing-mode: vertical-rl; direction: ltr; overflow-y: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
    <td>
      <div class="parent" style="writing-mode: vertical-rl; direction: ltr; overflow-x: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
    <td>
      <div class="parent" style="writing-mode: vertical-rl; direction: rtl; overflow-y: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
    <td>
      <div class="parent" style="writing-mode: vertical-rl; direction: rtl; overflow-x: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
  </tr>
  <tr>
    <td>VLR</td>
    <td>
      <div class="parent" style="writing-mode: vertical-lr; direction: ltr; overflow-y: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
    <td>
      <div class="parent" style="writing-mode: vertical-lr; direction: ltr; overflow-x: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
    <td>
      <div class="parent" style="writing-mode: vertical-lr; direction: rtl; overflow-y: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
    <td>
      <div class="parent" style="writing-mode: vertical-lr; direction: rtl; overflow-x: scroll;">
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
        <div class="child"></div>
      </div>
    </td>
  </tr>
</table>
<script src="/common/reftest-wait.js"></script>
<script src="/common/worklet-reftest.js"></script>
<script id="code" type="text/worklet">
registerLayout('test', class {
  async intrinsicSizes() {}
  async layout(children, edges, constraints) {
    const topLeftFragment = await children[0].layoutNextFragment();
    const topRightFragment = await children[1].layoutNextFragment();
    const bottomLeftFragment = await children[2].layoutNextFragment();
    const bottomRightFragment = await children[3].layoutNextFragment();

    topLeftFragment.inlineOffset = edges.inlineStart;
    topLeftFragment.blockOffset = edges.blockStart;

    topRightFragment.inlineOffset =
        constraints.fixedInlineSize - topRightFragment.inlineSize - edges.inlineEnd;
    topRightFragment.blockOffset = edges.blockStart;

    bottomLeftFragment.inlineOffset = edges.inlineStart;
    bottomLeftFragment.blockOffset =
        constraints.fixedBlockSize - bottomLeftFragment.blockSize - edges.blockEnd;

    bottomRightFragment.inlineOffset =
        constraints.fixedInlineSize - bottomRightFragment.inlineSize - edges.inlineEnd;
    bottomRightFragment.blockOffset =
        constraints.fixedBlockSize - bottomRightFragment.blockSize - edges.blockEnd;

    return {childFragments: [
        topLeftFragment,
        topRightFragment,
        bottomLeftFragment,
        bottomRightFragment
    ]};
  }
});
</script>
<script>
importWorkletAndTerminateTestAfterAsyncPaint(CSS.layoutWorklet, document.getElementById('code').textContent);
</script>