[wp-trac] [WordPress Trac] #41979: Caption changes don't cause Gallery widget to refresh in Customizer preview

[WordPress Trac]

#41979: Caption changes don't cause Gallery widget to refresh in Customizer preview
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 Reporter:  westonruter   |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  4.9
Component:  Widgets       |    Version:
 Severity:  normal        |   Keywords:  needs-patch
  Focuses:                |
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 The Gallery widget (#41914) allows for captions to be supplied for images
 via the media modal. Whereas the list of attachment `ids` are part of the
 widget instance data, the captions are ''not''. Therefore when just
 changing a caption then no change will be reflected in the Customizer
 preview since no change was made to the Customizer setting.

 This problem was first encountered in the Image widget (#39993) and the
 solution there was to put the caption into the instance data itself, and
 disable the auto-saving of the attachment changes back (see also #40403).
 For the code that was removed from the Image widget which could be useful
 for the Gallery widget here, see https://github.com/xwp/wp-core-media-
 widgets/commit/ddd59e2

 Reported by @rabmalin in
 https://core.trac.wordpress.org/ticket/41914#comment:10

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Ticket URL: <https://core.trac.wordpress.org/ticket/41979>
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