<html>
    <head>
      <base href="https://bugs.webkit.org/" />
    </head>
    <body>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - AX: AXObjectCache::visiblePositionForTextMarkerData() doesn't account for equivalent visibly equivalent positions"
   href="https://bugs.webkit.org/show_bug.cgi?id=154366#c6">Comment # 6</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - AX: AXObjectCache::visiblePositionForTextMarkerData() doesn't account for equivalent visibly equivalent positions"
   href="https://bugs.webkit.org/show_bug.cgi?id=154366">bug 154366</a>
              from <span class="vcard"><a class="email" href="mailto:rniwa&#64;webkit.org" title="Ryosuke Niwa &lt;rniwa&#64;webkit.org&gt;"> <span class="fn">Ryosuke Niwa</span></a>
</span></b>
        <pre>Comment on <span class=""><a href="attachment.cgi?id=271611&amp;action=diff" name="attach_271611" title="Patch">attachment 271611</a> <a href="attachment.cgi?id=271611&amp;action=edit" title="Patch">[details]</a></span>
Patch

View in context: <a href="https://bugs.webkit.org/attachment.cgi?id=271611&amp;action=review">https://bugs.webkit.org/attachment.cgi?id=271611&amp;action=review</a>

<span class="quote">&gt; Source/WebCore/accessibility/AXObjectCache.cpp:1416
&gt; +    Position deepEquivalent = visiblePosition.deepEquivalent();
&gt; +    bool equivalent = deepEquivalent.deprecatedNode() == textMarkerData.node &amp;&amp; deepEquivalent.deprecatedEditingOffset() == textMarkerData.offset;
&gt; +    if (!equivalent &amp;&amp; visiblePosition.affinity() != textMarkerData.affinity) {
&gt; +        Position position;
&gt; +        if (textMarkerData.affinity == UPSTREAM)
&gt; +            position = deepEquivalent.upstream();
&gt; +        else
&gt; +            position = deepEquivalent.downstream();
&gt; +        if (position.deprecatedNode() == textMarkerData.node &amp;&amp; position.deprecatedEditingOffset() == textMarkerData.offset)
&gt; +            equivalent = true;
&gt; +    }
&gt; +    return equivalent;</span >

Instead of manually adjusting the visible position's deep equivalent, you should just create a new VisiblePosition out of textMarkerData and check whether they match or not.

By the way, '&amp;' should be directly adjacent to type in C++ code: <a href="https://webkit.org/code-style-guidelines/#pointers-and-references">https://webkit.org/code-style-guidelines/#pointers-and-references</a></pre>
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
      
      <ul>
          <li>You are the assignee for the bug.</li>
      </ul>
    </body>
</html>