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Further fixes to focus delegation #7361

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Jan 31, 2022
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Further fixes to focus delegation #7361

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f01820e
Further fixes to focus delegation
domenic Nov 23, 2021
b324375
Rewrite as tree traversal
domenic Jan 7, 2022
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39 changes: 35 additions & 4 deletions source
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Original file line number Diff line number Diff line change
Expand Up @@ -2986,7 +2986,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#dom-shadowroot-slot-assignment">slot assignment</dfn> concept</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-slotable">slottable</dfn> concept</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#assign-slotables-for-a-tree">assign slottables for a tree</dfn> algorithm</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-inclusive-descendant">inclusive descendants</dfn> concept</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-inclusive-descendant">inclusive descendant</dfn> concept</li>
<li>The <dfn data-x="finding flattened slottables" data-x-href="https://dom.spec.whatwg.org/#find-flattened-slotables">find flattened slottables</dfn> algorithm</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#slottable-manual-slot-assignment">manual slot assignment</dfn> concept</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#assign-a-slot">assign a slot</dfn> algorithm</li>
Expand Down Expand Up @@ -75218,12 +75218,43 @@ END:VCARD</pre>
data-x="focusable area">focusable areas</span> whose <span>DOM anchor</span> is a
<span>shadow-including descendant</span> of <var>focus target</var>.</p></li>

<li><p>If <var>possible focus delegates</var> is empty, then return null.</p></li>

<li><p>Sort <var>possible focus delegates</var> by <span>shadow-including tree order</span> of
their <span data-x="DOM anchor">DOM anchors</span>.</p></li>

<li><p>Return <var>possible focus delegates</var>[0].</p></li>
<li>
<p>For each <var>possible focus delegate</var> of <var>possible focus delegates</var>:</p>

<ol>
<li><p>Let <var>is still a candidate</var> be true.</p></li>

<li><p>Let <var>root</var> be <var>possible focus delegate</var>'s <span>DOM anchor</span>'s
<span>root</span>.</p></li>

<li>
<p>While <var>root</var> is a <span>shadow root</span>:</p>

<ol>
<li><p>If <var>focus target</var> is an <span>inclusive descendant</span> of
<var>root</var>, then <span>break</span>.</p></li>

<li><p>If <var>root</var>'s <span>delegates focus</span> is false, then set
<var>is still a candidate</var> to false and <span>break</span>.</p></li>

<li><p>Set <var>root</var> to <var>root</var>'s <span
data-x="concept-DocumentFragment-host">host</span>'s <span>root</span>.</p></li>
</ol>
</li>

<li><p>If <var>is still a candidate</var> is true, then return <var>possible focus
delegate</var>.</p></li>
</ol>

<p class="note">The intent is to return the first <span>focusable area</span> in <var>possible
focus delegates</var> where the path between its <span>DOM anchor</span> and <var>focus
target</var> delegates focus at any shadow tree boundaries.</p>
</li>

<li><p>Return null.</p></li>
</ol>

<p>The <dfn>autofocus delegate</dfn> for a <var>focus target</var> given a <var>focus
Expand Down