[wp-trac] [WordPress Trac] #29948: Use contextual controls (active_callback) API for conditionally-displayed core contextual controls

[WordPress Trac]

#29948: Use contextual controls (active_callback) API for conditionally-displayed
core contextual controls
------------------------------+------------------------------
 Reporter:  celloexpressions  |       Owner:
     Type:  enhancement       |      Status:  new
 Priority:  normal            |   Milestone:  Awaiting Review
Component:  Customize         |     Version:  4.0
 Severity:  normal            |  Resolution:
 Keywords:  needs-patch       |     Focuses:
------------------------------+------------------------------

Comment (by westonruter):

 You're referring to this code?

 {{{
 #!js
                 // Control visibility for default controls
                 $.each({
                         'background_image': {
                                 controls: [ 'background_repeat',
 'background_position_x', 'background_attachment' ],
                                 callback: function( to ) { return !! to; }
                         },
                         'show_on_front': {
                                 controls: [ 'page_on_front',
 'page_for_posts' ],
                                 callback: function( to ) { return 'page'
 === to; }
                         },
                         'header_textcolor': {
                                 controls: [ 'header_textcolor' ],
                                 callback: function( to ) { return 'blank'
 !== to; }
                         }
                 }, function( settingId, o ) {
                         api( settingId, function( setting ) {
                                 $.each( o.controls, function( i, controlId
 ) {
                                         api.control( controlId, function(
 control ) {
                                                 var visibility = function(
 to ) {
 control.container.toggle( o.callback( to ) );
                                                 };

                                                 visibility( setting.get()
 );
                                                 setting.bind( visibility
 );
                                         });
                                 });
                         });
                 });
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/29948#comment:1>
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