Theme Customizer: Add WP_Customizer_Setting->control_params, and wp.customize.Control.params to allow settings to pass arbitrary parameters to controls. Add the 'context' parameter to wp.customize.UploadControl. see #19910.

git-svn-id: http://svn.automattic.com/wordpress/trunk@20276 1a063a9b-81f0-0310-95a4-ce76da25c4cd

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

@@ -14,6 +14,7 @@ class WP_Customize_Setting {
 	public $section           = '';
 	public $label             = '';
 	public $control           = 'text';
+	public $control_params    = array();
 	public $type              = 'theme_mod';
 	public $choices           = array();
 	public $capability        = 'edit_theme_options';

wp-includes/class-wp-customize.php

@@ -538,6 +538,9 @@ final class WP_Customize {
 			'section'        => 'header',
 			'control'        => 'upload',
 			'default'        => get_theme_support( 'custom-header', 'default-image' ),
+			'control_params' => array(
+				'context'        => 'custom-header',
+			),
 		) );
 
 		/* Custom Background */
@@ -562,6 +565,9 @@ final class WP_Customize {
 			'section'        => 'background',
 			'control'        => 'upload',
 			'default'        => get_theme_support( 'custom-background', 'default-image' ),
+			'control_params' => array(
+				'context'        => 'custom-background',
+			),
 		) );
 
 		$this->add_setting( 'background_repeat', array(

wp-includes/customize-controls.php

@@ -103,6 +103,7 @@ do_action( 'customize_controls_print_scripts' );
 		$settings['controls'][ $id ] = array(
 			'value'   => $setting->value(),
 			'control' => $setting->control,
+			'params'  => $setting->control_params,
 		);
 
 		if ( $setting->visibility ) {

wp-includes/js/customize-controls.dev.js

@@ -10,6 +10,7 @@
 		initialize: function( id, value, options ) {
 			var name = '[name="' + api.settings.prefix + id + '"]';
 
+			this.params = {};
 			api.Value.prototype.initialize.call( this, value, options );
 
 			this.id = id;
@@ -90,6 +91,9 @@
 			});
 
 			this.bind( this.removerVisibility );
+
+			if ( this.params.context )
+				control.uploader.param( 'post_data[context]', this.params.context );
 		},
 		removerVisibility: function( on ) {
 			this.remover.toggle( !! on );
@@ -240,6 +244,7 @@
 				control;
 
 			control = api.add( id, new constructor( id, data.value, {
+				params: data.params,
 				previewer: previewer
 			} ) );
 
@@ -274,14 +279,6 @@
 		api( 'background_color', function( control ) {
 			control.method = 'postMessage';
 		});
-
-		api( 'background_image', function( control ) {
-			control.uploader.param( 'post_data[context]', 'custom-background' );
-		});
-
-		api( 'header_image', function( control ) {
-			control.uploader.param( 'post_data[context]', 'custom-header' );
-		});
 	});
 
 })( wp, jQuery );