(function( exports, $ ){ var api = wp.customize, debounce; /** * Returns a debounced version of the function. * * @todo Require Underscore.js for this file and retire this. */ debounce = function( fn, delay, context ) { var timeout; return function() { var args = arguments; context = context || this; clearTimeout( timeout ); timeout = setTimeout( function() { timeout = null; fn.apply( context, args ); }, delay ); }; }; /** * @constructor * @augments wp.customize.Messenger * @augments wp.customize.Class * @mixes wp.customize.Events */ api.Preview = api.Messenger.extend({ /** * Requires params: * - url - the URL of preview frame */ initialize: function( params, options ) { var self = this; api.Messenger.prototype.initialize.call( this, params, options ); this.body = $( document.body ); this.body.on( 'click.preview', 'a', function( event ) { event.preventDefault(); self.send( 'scroll', 0 ); self.send( 'url', $(this).prop('href') ); }); // You cannot submit forms. // @todo: Allow form submissions by mixing $_POST data with the customize setting $_POST data. this.body.on( 'submit.preview', 'form', function( event ) { event.preventDefault(); }); this.window = $( window ); this.window.on( 'scroll.preview', debounce( function() { self.send( 'scroll', self.window.scrollTop() ); }, 200 )); this.bind( 'scroll', function( distance ) { self.window.scrollTop( distance ); }); } }); $( function() { api.settings = window._wpCustomizeSettings; if ( ! api.settings ) return; var bg; api.preview = new api.Preview({ url: window.location.href, channel: api.settings.channel }); api.preview.bind( 'settings', function( values ) { $.each( values, function( id, value ) { if ( api.has( id ) ) api( id ).set( value ); else api.create( id, value ); }); }); api.preview.trigger( 'settings', api.settings.values ); api.preview.bind( 'setting', function( args ) { var value; args = args.slice(); if ( value = api( args.shift() ) ) value.set.apply( value, args ); }); api.preview.bind( 'sync', function( events ) { $.each( events, function( event, args ) { api.preview.trigger( event, args ); }); api.preview.send( 'synced' ); }); api.preview.bind( 'active', function() { if ( api.settings.nonce ) { api.preview.send( 'nonce', api.settings.nonce ); } api.preview.send( 'documentTitle', document.title ); }); api.preview.send( 'ready', { activePanels: api.settings.activePanels, activeSections: api.settings.activeSections, activeControls: api.settings.activeControls } ); // Display a loading indicator when preview is reloading, and remove on failure. api.preview.bind( 'loading-initiated', function () { $( 'body' ).addClass( 'wp-customizer-unloading' ); $( 'html' ).prop( 'title', api.settings.l10n.loading ); }); api.preview.bind( 'loading-failed', function () { $( 'body' ).removeClass( 'wp-customizer-unloading' ); $( 'html' ).prop( 'title', '' ); }); /* Custom Backgrounds */ bg = $.map(['color', 'image', 'position_x', 'repeat', 'attachment'], function( prop ) { return 'background_' + prop; }); api.when.apply( api, bg ).done( function( color, image, position_x, repeat, attachment ) { var body = $(document.body), head = $('head'), style = $('#custom-background-css'), update; update = function() { var css = ''; // The body will support custom backgrounds if either // the color or image are set. // // See get_body_class() in /wp-includes/post-template.php body.toggleClass( 'custom-background', !! ( color() || image() ) ); if ( color() ) css += 'background-color: ' + color() + ';'; if ( image() ) { css += 'background-image: url("' + image() + '");'; css += 'background-position: top ' + position_x() + ';'; css += 'background-repeat: ' + repeat() + ';'; css += 'background-attachment: ' + attachment() + ';'; } // Refresh the stylesheet by removing and recreating it. style.remove(); style = $('').appendTo( head ); }; $.each( arguments, function() { this.bind( update ); }); }); api.trigger( 'preview-ready' ); }); })( wp, jQuery );