[wp-trac] [WordPress Trac] #34843: Customizer: allow themes in the Customizer to be disabled by plugins

[WordPress Trac]

#34843: Customizer: allow themes in the Customizer to be disabled by plugins
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 Reporter:  mattwiebe                   |       Owner:
     Type:  enhancement                 |      Status:  assigned
 Priority:  normal                      |   Milestone:  Future Release
Component:  Customize                   |     Version:  trunk
 Severity:  normal                      |  Resolution:
 Keywords:  needs-patch good-first-bug  |     Focuses:
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Comment (by nacin):

 Unfortunately this filter should have passed `null` and allowed an empty
 array to be returned back all the way through.

 There are 38 filters in core that pass an `array()` as the first argument,
 but this is the only one that is explicitly labeled a `pre` hook. 23 other
 filters pass null or false. So this is definitely an unfortunate
 exception.

 Sounds like the best workaround here, @mattwiebe, would be to return back
 exactly one theme — the current one, which is almost surely already in
 local cache — then otherwise unhook the control.

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Ticket URL: <https://core.trac.wordpress.org/ticket/34843#comment:3>
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