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Update how FocusChangeDisabled is set to true in case of change of focus #264

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Update how FocusChangeDisabled is set to true in case of change of focus #264

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7bd74b4
Clarify that UA should listen to focus change
youennf Mar 30, 2023
99f2b39
Address further feedback
youennf Jul 5, 2023
286a32d
Move section up
youennf Jul 6, 2023
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22 changes: 22 additions & 0 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -397,6 +397,28 @@ <h2>
<li>
If <var>controller</var> is not <code>null</code>, run the following steps:
<ol>
<li>
<p>Let <var>toplevelTraversable</var> be the <a>current settings object</a>'s's [=relevant global object=]'s
[=navigable=]'s [=top-level traversable=].</p>
</li>
<li>
<p>Listen to <var>toplevelTraversable</var>'s change of <a data-cite="!HTML/#system-focus">system focus</a>.</p>
<p>The first time <var>toplevelTraversable</var> is losing <a data-cite="!HTML/#system-focus">focus</a>,
queue a global task on the <a data-cite="!HTML/#user-interaction-task-source">user interaction task source</a>
given <a>current settings object</a>'s [=relevant global object=] to run the following step:
<ol>
<li><p>Set <var>controller</var>.{{CaptureController/[[FocusChangeDisabled]]}} to <code>true</code>.</p></li>
</ol>
</p>
<p class="note">
These steps ensure {{CaptureController}} will not override explicit focus actions made by the user,
typically if a user decides to switch to another surface shortly after starting capture.
This algorithm describes what to do for surface pickers implemented by the <a>user agent</a> but the same
requirement applies to surface pickers implemented outside of the <a>user agent</a>,
where the loss of capturing document focus is not necessarily the signal triggering setting
{{CaptureController/[[FocusChangeDisabled]]}} to <code>true</code>.
</p>
</li>
<li>
<p>
Set <var>controller</var>.{{CaptureController/[[Source]]}}
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