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<!doctype html>
<html>
<head>
  <title>Tree related Role Verification Tests</title>
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
  <script src="/resources/testdriver.js"></script>
  <script src="/resources/testdriver-vendor.js"></script>
  <script src="/resources/testdriver-actions.js"></script>
  <script src="/wai-aria/scripts/aria-utils.js"></script>
</head>
<style>
  /* Hide collapsed rows */
  [role="treegrid"] tr.hidden {
    display: none;
  }

  /* Indents */
  [role="treegrid"] tr[aria-level="2"] > td:first-child {
    padding-left: 2ch;
  }

  [role="treegrid"] tr[aria-level="3"] > td:first-child {
    padding-left: 4ch;
  }

  /* Collapse/expand icons */
  [role="treegrid"] tr > td:first-child::before {
    content: "";
    display: inline-block;
    width: 2ch;
    height: 11px;
    transition: transform 0.3s;
    transform-origin: 5px 5px;
  }

  [role="treegrid"] tr[aria-expanded] > td:first-child::before,
  [role="treegrid"] td[aria-expanded]:first-child::before {
    cursor: pointer;

    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12'%3E%3Cpolygon fill='black' points='2,0 2,10 10,5'%3E%3C/polygon%3E%3C/svg%3E%0A");
    background-repeat: no-repeat;
  }

  [role="treegrid"] tr[aria-expanded="true"] > td:first-child::before,
  [role="treegrid"] td[aria-expanded="true"]:first-child::before {
    transform: rotate(90deg);
  }
</style>
<body>

<p>Tests <a href="https://w3c.github.io/aria/#tree">tree</a> and related roles.</p>

<ul role="tree" data-testname="role is tree" data-expectedrole="tree" class="ex">
  <li role="treeitem" data-testname="role is treeitem (in tree)" data-expectedrole="treeitem" class="ex">
    x
    <ul role="group" data-testname="role is group (in treeitem)" data-expectedrole="group" class="ex">
      <li role="treeitem" data-testname="role is treeitem (in group, in treeitem)" data-expectedrole="treeitem" class="ex">x</li>
      <li role="treeitem">x</li>
    </ul>
  </li>
  <li role="treeitem">x</li>
</ul>

<table role="treegrid" data-testname="role is treegrid" data-expectedrole="treegrid" class="ex">
  <tbody>
    <tr role="row" aria-expanded="true" aria-level="1" aria-posinset="1" aria-setsize="2" data-testname="role is row (in treegrid)" data-expectedrole="row" class="ex expander">
      <td role="gridcell" data-testname="role is gridcell (in row, in treegrid)" data-expectedrole="gridcell" class="ex">x</td>
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
    </tr>
    <tr role="row" aria-level="2" aria-posinset="1" aria-setsize="2">
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
    </tr>
    <tr aria-expanded="false" aria-level="2" aria-posinset="2" aria-setsize="2" role="row" class="expander">
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
    </tr>
    <tr role="row" aria-level="3" aria-posinset="1" aria-setsize="1" class="hidden">
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
    </tr>
    <tr role="row" aria-expanded="false" aria-level="1" aria-posinset="2" aria-setsize="2" class="expander">
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
    </tr>
    <tr role="row" aria-level="2" aria-posinset="1" aria-setsize="2" class="hidden">
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
    </tr>
    <tr role="row" aria-level="2" aria-posinset="1" aria-setsize="2" class="hidden">
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
      <td role="gridcell">x</td>
    </tr>
  </tbody>
</table>

<!--
  CORE-AAM requires that, for elements with roles not contained in the
  required context, user agents must ignore the role token and return the
  computed role as if the ignored role token had not been included.
  See https://w3c.github.io/core-aam/#roleMappingComputedRole
-->
<nav role="treeitem" data-testname="orphaned treeitem outside the context of tree" data-expectedrole="navigation" class="ex">x</nav>
<button role="treeitem" data-testname="orphaned button with treeitem role outside tree context" data-expectedrole="button" class="ex">x</button>

<script>
  AriaUtils.verifyRolesBySelector(".ex");

  const expanders = document.querySelectorAll(".expander");
  expanders.forEach((expander) => {
    expander.addEventListener("click", () => {

      const expanderLevel = parseInt(expander.getAttribute("aria-level"))
      let nextSibling = expander.nextElementSibling;

      // Toggle aria-expanded for the row being expanded
      let isExpanding = expander.getAttribute("aria-expanded") !== "true";
      expander.setAttribute("aria-expanded", isExpanding.toString());

      while (nextSibling) {
        const nextSiblingLevel = parseInt(nextSibling.getAttribute("aria-level"));

        // Don't expand rows found on the same level
        if (nextSiblingLevel === expanderLevel) nextSibling = null;

        if (isExpanding) {
          // Don't expand rows beyond the next level if an ".expander" row is found as the nextSibling
          if (nextSiblingLevel - expanderLevel === 1) {
            nextSibling.classList.remove("hidden");
            // Don't expand sub rows found
            if (nextSibling.hasAttribute("aria-expanded")) nextSibling.setAttribute("aria-expanded", "false");
          }
        } else {
          // Only expand rows that are more "indented" than the ".expander" row. A higher aria-level indicates a
          // higher "level"
          if (nextSiblingLevel > expanderLevel) {
            nextSibling.classList.add("hidden");
          }
        }

        nextSibling = nextSibling.nextElementSibling;
      }
    });
  });
</script>

</body>
</html>