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Add steps for ariaLabelledByElements and ariaDescribedByElements #170

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Add steps for ariaLabelledByElements and ariaDescribedByElements #170

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524cec6
Add steps for `ariaLabelledByElements` and `ariaDescribedByElements`
nolanlawson Sep 29, 2022
2409e26
fix: avoid reference to the attribute versions
nolanlawson Oct 6, 2022
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10 changes: 5 additions & 5 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -308,13 +308,13 @@ <h4>Computation steps</h4>
</li>
<li id="step2B">Otherwise:
<ul>
<li>if computing a <a class="termref" data-lt="accessible name">name</a>, and the <code>current node</code> has an <code>aria-labelledby</code> [=attribute=] that contains at least one valid IDREF, and the <code>current node</code> is not already part of an <code>aria-labelledby</code> traversal, process its IDREFs in the order they occur: </li>
<li>or, if computing a <a class="termref" data-lt="accessible description">description</a>, and the <code>current node</code> has an <code>aria-describedby</code> [=attribute=] that contains at least one valid IDREF, and the <code>current node</code> is not already part of an <code>aria-describedby</code> traversal, process its IDREFs in the order they occur:
<li>if computing a <a class="termref" data-lt="accessible name">name</a>, and the <code>current node</code> has an <code>aria-labelledby</code> [=attribute=] that contains at least one valid IDREF or an <code>ariaLabelledByElements</code> array that contains at least one valid element, and the <code>current node</code> is not already part of an <code>aria-labelledby</code> traversal, process its IDREFs or elements in the order they occur: </li>
<li>or, if computing a <a class="termref" data-lt="accessible description">description</a>, and the <code>current node</code> has an <code>aria-describedby</code> [=attribute=] that contains at least one valid IDREF or an <code>ariaDescribedByElements</code> array that contains at least one valid element, and the <code>current node</code> is not already part of an <code>aria-describedby</code> traversal, process its IDREFs or elements in the order they occur:
<ol>
<li id="step2B.i">Set the <code>accumulated text</code> to the empty string.</li>
<li id="step2B.ii">For each IDREF:
<li id="step2B.ii">For each IDREF or element in the array:
<ol>
<li id="step2B.ii.a">Set the <code>current node</code> to the node referenced by the IDREF.</li>
<li id="step2B.ii.a">Set the <code>current node</code> to the element referenced by the IDREF or element in the array.</li>
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Changed this from node to element since technically an IDREF can only point to an element, since only elements can have IDs.

<li id="step2B.ii.b">Compute the text alternative of the <code>current node</code> beginning with step 2. Set the <code>result</code> to that text alternative.</li>
<li id="step2B.ii.c">Append the <code>result</code>, with a space, to the <code>accumulated text</code>.</li>
</ol>
Expand Down Expand Up @@ -386,7 +386,7 @@ <h4>Computation steps</h4>
<p>For example, in <abbr title="Hypertext Markup Language">HTML</abbr>, the <code>img</code> element's <code>alt</code> attribute defines a text alternative string, and the <code>label</code> element provides text for the referenced form element. In <abbr title="SVG2">SVG2</abbr>, the <code>desc</code> and <code>title</code> elements provide a description of their parent element. </p>
</details></div>
</li>
<li id="step2F">Otherwise, if the <code>current node's</code> <a class="termref">role</a> allows <a class="specref" href="#namefromcontent">name from content</a>, or if the <code>current node</code> is referenced by <code>aria-labelledby</code>, <code>aria-describedby</code>, or is a native host language text alternative [=element=] (e.g. <code>label</code> in HTML), or is a descendant of a native host language text alternative [=element=]:
<li id="step2F">Otherwise, if the <code>current node's</code> <a class="termref">role</a> allows <a class="specref" href="#namefromcontent">name from content</a>, or if the <code>current node</code> is referenced by <code>aria-labelledby</code>, <code>aria-describedby</code>, <code>ariaLabelledByElements</code>, or <code>ariaDescribedByElements</code>, or is a native host language text alternative [=element=] (e.g. <code>label</code> in HTML), or is a descendant of a native host language text alternative [=element=]:
<ol>
<li id="step2F.i">Set the <code>accumulated text</code> to the empty string.</li>
<li id="step2F.ii">Check for <abbr title="Cascading Style Sheets">CSS</abbr> generated textual content associated with the <code>current node</code> and include it in the <code>accumulated text</code>. The <abbr title="Cascading Style Sheets">CSS</abbr> <a href="https://www.w3.org/TR/CSS2/generate.html#before-after-content"><code>:before</code> and <code>:after</code></a> pseudo elements [[!CSS2]] can provide textual content for [=element|elements=] that have a content model.
Expand Down