1 files changed, 147 insertions, 0 deletions
diff --git a/wp-admin/js/custom-background.js b/wp-admin/js/custom-background.js
new file mode 100644
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+++ b/wp-admin/js/custom-background.js
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+/**
+ * @output wp-admin/js/custom-background.js
+ */
+
+/* global ajaxurl */
+
+/**
+ * Registers all events for customizing the background.
+ *
+ * @since 3.0.0
+ *
+ * @requires jQuery
+ */
+(function($) {
+	$( function() {
+		var frame,
+			bgImage = $( '#custom-background-image' );
+
+		/**
+		 * Instantiates the WordPress color picker and binds the change and clear events.
+		 *
+		 * @since 3.5.0
+		 *
+		 * @return {void}
+		 */
+		$('#background-color').wpColorPicker({
+			change: function( event, ui ) {
+				bgImage.css('background-color', ui.color.toString());
+			},
+			clear: function() {
+				bgImage.css('background-color', '');
+			}
+		});
+
+		/**
+		 * Alters the background size CSS property whenever the background size input has changed.
+		 *
+		 * @since 4.7.0
+		 *
+		 * @return {void}
+		 */
+		$( 'select[name="background-size"]' ).on( 'change', function() {
+			bgImage.css( 'background-size', $( this ).val() );
+		});
+
+		/**
+		 * Alters the background position CSS property whenever the background position input has changed.
+		 *
+		 * @since 4.7.0
+		 *
+		 * @return {void}
+		 */
+		$( 'input[name="background-position"]' ).on( 'change', function() {
+			bgImage.css( 'background-position', $( this ).val() );
+		});
+
+		/**
+		 * Alters the background repeat CSS property whenever the background repeat input has changed.
+		 *
+		 * @since 3.0.0
+		 *
+		 * @return {void}
+		 */
+		$( 'input[name="background-repeat"]' ).on( 'change',  function() {
+			bgImage.css( 'background-repeat', $( this ).is( ':checked' ) ? 'repeat' : 'no-repeat' );
+		});
+
+		/**
+		 * Alters the background attachment CSS property whenever the background attachment input has changed.
+		 *
+		 * @since 4.7.0
+		 *
+		 * @return {void}
+		 */
+		$( 'input[name="background-attachment"]' ).on( 'change', function() {
+			bgImage.css( 'background-attachment', $( this ).is( ':checked' ) ? 'scroll' : 'fixed' );
+		});
+
+		/**
+		 * Binds the event for opening the WP Media dialog.
+		 *
+		 * @since 3.5.0
+		 *
+		 * @return {void}
+		 */
+		$('#choose-from-library-link').on( 'click', function( event ) {
+			var $el = $(this);
+
+			event.preventDefault();
+
+			// If the media frame already exists, reopen it.
+			if ( frame ) {
+				frame.open();
+				return;
+			}
+
+			// Create the media frame.
+			frame = wp.media.frames.customBackground = wp.media({
+				// Set the title of the modal.
+				title: $el.data('choose'),
+
+				// Tell the modal to show only images.
+				library: {
+					type: 'image'
+				},
+
+				// Customize the submit button.
+				button: {
+					// Set the text of the button.
+					text: $el.data('update'),
+					/*
+					 * Tell the button not to close the modal, since we're
+					 * going to refresh the page when the image is selected.
+					 */
+					close: false
+				}
+			});
+
+			/**
+			 * When an image is selected, run a callback.
+			 *
+			 * @since 3.5.0
+			 *
+			 * @return {void}
+ 			 */
+			frame.on( 'select', function() {
+				// Grab the selected attachment.
+				var attachment = frame.state().get('selection').first();
+				var nonceValue = $( '#_wpnonce' ).val() || '';
+
+				// Run an Ajax request to set the background image.
+				$.post( ajaxurl, {
+					action: 'set-background-image',
+					attachment_id: attachment.id,
+					_ajax_nonce: nonceValue,
+					size: 'full'
+				}).done( function() {
+					// When the request completes, reload the window.
+					window.location.reload();
+				});
+			});
+
+			// Finally, open the modal.
+			frame.open();
+		});
+	});
+})(jQuery);