Customizer: Improve ability to filter active state for widget area Customizer sections.

* Mark panels, sections, controls as active if preview explicitly indicates.
* Introduce `WP_Customize_Sidebar_Section` PHP class, and `SidebarSection` JS class.
* Move logic for determining whether a sidebar section is active from the `SidebarControl` to `SidebarSection`.

props westonruter.
fixes #30235.
Built from https://develop.svn.wordpress.org/trunk@30329


git-svn-id: http://core.svn.wordpress.org/trunk@30328 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/customize-controls.js

@@ -1348,23 +1348,22 @@
 					return;
 				}
 
+				/*
+				 * Walk over all panels, sections, and controls and set their
+				 * respective active states to true if the preview explicitly
+				 * indicates as such.
+				 */
 				var constructs = {
 					panel: data.activePanels,
 					section: data.activeSections,
 					control: data.activeControls
 				};
-
-				$.each( constructs, function ( type, activeConstructs ) {
-					if ( activeConstructs ) {
-						$.each( activeConstructs, function ( id, active ) {
-							var construct = api[ type ]( id );
-							if ( construct ) {
+				_( constructs ).each( function ( activeConstructs, type ) {
+					api[ type ].each( function ( construct, id ) {
+						var active = !! ( activeConstructs && activeConstructs[ id ] );
 						construct.active( active );
-							}
 					} );
-					}
 				} );
-
 			} );
 
 			this.request = $.ajax( this.previewUrl(), {

wp-admin/js/customize-widgets.js

@@ -1367,12 +1367,55 @@
 		}
 	} );
 
+	/**
+	 * wp.customize.Widgets.SidebarSection
+	 *
+	 * Customizer section representing a widget area widget
+	 *
+	 * @since 4.1.0
+	 */
+	api.Widgets.SidebarSection = api.Section.extend({
+
+		/**
+		 * Sync the section's active state back to the Backbone model's is_rendered attribute
+		 */
+		ready: function () {
+			var section = this, registeredSidebar;
+			api.Section.prototype.ready.call( this );
+			registeredSidebar = api.Widgets.registeredSidebars.get( section.params.sidebarId );
+			section.active.bind( function ( active ) {
+				registeredSidebar.set( 'is_rendered', active );
+			});
+			registeredSidebar.set( 'is_rendered', section.active() );
+		},
+
+		/**
+		 * Override Section.isContextuallyActive() to skip considering
+		 * SidebarControl  as opposed to a WidgetControl.
+		 *
+		 * @returns {boolean}
+		 */
+		isContextuallyActive: function () {
+			var section, activeCount;
+			section = this;
+			activeCount = 0;
+			_( section.controls() ).each( function ( control ) {
+				if ( control.active() && ! control.extended( api.Widgets.SidebarControl ) ) {
+					activeCount += 1;
+				}
+			});
+			return ( activeCount !== 0 );
+		}
+	});
+
 	/**
 	 * wp.customize.Widgets.SidebarControl
 	 *
 	 * Customizer control for widgets.
 	 * Note that 'sidebar_widgets' must match the WP_Widget_Area_Customize_Control::$type
 	 *
+	 * @since 3.9.0
+	 *
 	 * @constructor
 	 * @augments wp.customize.Control
 	 */
@@ -1395,8 +1438,7 @@
 		 * Update ordering of widget control forms when the setting is updated
 		 */
 		_setupModel: function() {
-			var self = this,
-				registeredSidebar = api.Widgets.registeredSidebars.get( this.params.sidebar_id );
+			var self = this;
 
 			this.setting.bind( function( newWidgetIds, oldWidgetIds ) {
 				var widgetFormControls, removedWidgetIds, priority;
@@ -1499,13 +1541,6 @@
 
 				} );
 			} );
-
-			// Update the model with whether or not the sidebar is rendered
-			self.active.bind( function ( active ) {
-				registeredSidebar.set( 'is_rendered', active );
-				api.section( self.section.get() ).active( active );
-			} );
-			api.section( self.section.get() ).active( self.active() );
 		},
 
 		/**
@@ -1816,10 +1851,10 @@
 		}
 	} );
 
-	/**
-	 * Extends wp.customizer.controlConstructor with control constructor for
-	 * widget_form and sidebar_widgets.
-	 */
+	// Register models for custom section and control types
+	$.extend( api.sectionConstructor, {
+		sidebar: api.Widgets.SidebarSection
+	});
 	$.extend( api.controlConstructor, {
 		widget_form: api.Widgets.WidgetControl,
 		sidebar_widgets: api.Widgets.SidebarControl

wp-includes/class-wp-customize-control.php

@@ -1115,17 +1115,6 @@ class WP_Widget_Area_Customize_Control extends WP_Customize_Control {
 		<?php
 	}
 
-	/**
-	 * Whether the current sidebar is rendered on the page.
-	 *
-	 * @since 4.0.0
-	 * @access public
-	 *
-	 * @return bool Whether sidebar is rendered.
-	 */
-	public function active_callback() {
-		return $this->manager->widgets->is_sidebar_rendered( $this->sidebar_id );
-	}
 }
 
 /**

wp-includes/class-wp-customize-manager.php

@@ -515,6 +515,9 @@ final class WP_Customize_Manager {
 		}
 		foreach ( $this->panels as $id => $panel ) {
 			$settings['activePanels'][ $id ] = $panel->active();
+			foreach ( $panel->sections as $id => $section ) {
+				$settings['activeSections'][ $id ] = $section->active();
+			}
 		}
 		foreach ( $this->sections as $id => $section ) {
 			$settings['activeSections'][ $id ] = $section->active();

wp-includes/class-wp-customize-section.php

@@ -310,3 +310,54 @@ class WP_Customize_Section {
 		<?php
 	}
 }
+
+/**
+ * Customizer section representing widget area (sidebar).
+ *
+ * @package WordPress
+ * @subpackage Customize
+ * @since 4.1.0
+ */
+class WP_Customize_Sidebar_Section extends WP_Customize_Section {
+
+	/**
+	 * @since 4.1.0
+	 * @access public
+	 * @var string
+	 */
+	public $type = 'sidebar';
+
+	/**
+	 * Unique identifier.
+	 *
+	 * @since 4.1.0
+	 * @access public
+	 * @var string
+	 */
+	public $sidebar_id;
+
+	/**
+	 * Gather the parameters passed to client JavaScript via JSON.
+	 *
+	 * @since 4.1.0
+	 *
+	 * @return array The array to be exported to the client as JSON
+	 */
+	public function json() {
+		$json = parent::json();
+		$json['sidebarId'] = $this->sidebar_id;
+		return $json;
+	}
+
+	/**
+	 * Whether the current sidebar is rendered on the page.
+	 *
+	 * @since 4.1.0
+	 * @access public
+	 *
+	 * @return bool Whether sidebar is rendered.
+	 */
+	public function active_callback() {
+		return $this->manager->widgets->is_sidebar_rendered( $this->sidebar_id );
+	}
+}

wp-includes/class-wp-customize-widgets.php

@@ -468,6 +468,7 @@ final class WP_Customize_Widgets {
 						'description' => $GLOBALS['wp_registered_sidebars'][ $sidebar_id ]['description'],
 						'priority' => array_search( $sidebar_id, array_keys( $wp_registered_sidebars ) ),
 						'panel' => 'widgets',
+						'sidebar_id' => $sidebar_id,
 					);
 
 					/**
@@ -481,7 +482,8 @@ final class WP_Customize_Widgets {
 					 */
 					$section_args = apply_filters( 'customizer_widgets_section_args', $section_args, $section_id, $sidebar_id );
 
-					$this->manager->add_section( $section_id, $section_args );
+					$section = new WP_Customize_Sidebar_Section( $this->manager, $section_id, $section_args );
+					$this->manager->add_section( $section );
 
 					$control = new WP_Widget_Area_Customize_Control( $this->manager, $setting_id, array(
 						'section'    => $section_id,

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.1-alpha-30328';
+$wp_version = '4.1-alpha-30329';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.