[wp-trac] [WordPress Trac] #36900: Media grid AttachmentsBrowser arrows navigation and restoreFocus() no longer work

[WordPress Trac]

#36900: Media grid AttachmentsBrowser arrows navigation and restoreFocus() no
longer work
--------------------------+-----------------------------
 Reporter:  afercia       |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Media         |    Version:  4.5
 Severity:  normal        |   Keywords:
  Focuses:  javascript    |
--------------------------+-----------------------------
 In WordPress 4.4, the media grid allows to navigate attachments in all
 directions using the Up/Down/Left/Right arrow keys. Also, when in the
 details sidebar and tabbing backwards, focus is restored to the currently
 selected attachment.

 In WordPress 4.5 these two functionalities no longer work. Sorry can't
 help more than this, just tracked down to:
 in `AttachmentsBrowser.createAttachments()` which runs on
 `AttachmentsBrowser.initialize()`
 these two callbacks no longer work:

 {{{
 this.attachments.listenTo( this.controller, 'attachment:keydown:arrow',
 this.attachments.arrowEvent );
 this.attachments.listenTo( this.controller, 'attachment:details:shift-
 tab', this.attachments.restoreFocus );
 }}}

 probably related to the changes in Backbone.js 1.2.0, see [36546]

 /cc @wonderboymusic @adamsilverstein

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Ticket URL: <https://core.trac.wordpress.org/ticket/36900>
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