267 lines
7.3 KiB
JavaScript
267 lines
7.3 KiB
JavaScript
/*
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* Script run inside a Customizer preview frame.
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*/
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(function( exports, $ ){
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var api = wp.customize,
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debounce;
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/**
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* Returns a debounced version of the function.
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*
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* @todo Require Underscore.js for this file and retire this.
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*/
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debounce = function( fn, delay, context ) {
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var timeout;
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return function() {
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var args = arguments;
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context = context || this;
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clearTimeout( timeout );
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timeout = setTimeout( function() {
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timeout = null;
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fn.apply( context, args );
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}, delay );
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};
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};
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/**
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* @constructor
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* @augments wp.customize.Messenger
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* @augments wp.customize.Class
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* @mixes wp.customize.Events
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*/
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api.Preview = api.Messenger.extend({
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/**
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* @param {object} params - Parameters to configure the messenger.
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* @param {object} options - Extend any instance parameter or method with this object.
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*/
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initialize: function( params, options ) {
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var self = this;
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api.Messenger.prototype.initialize.call( this, params, options );
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this.body = $( document.body );
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this.body.on( 'click.preview', 'a', function( event ) {
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var link, isInternalJumpLink;
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link = $( this );
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isInternalJumpLink = ( '#' === link.attr( 'href' ).substr( 0, 1 ) );
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event.preventDefault();
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if ( isInternalJumpLink && '#' !== link.attr( 'href' ) ) {
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$( link.attr( 'href' ) ).each( function() {
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this.scrollIntoView();
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} );
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}
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/*
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* Note the shift key is checked so shift+click on widgets or
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* nav menu items can just result on focusing on the corresponding
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* control instead of also navigating to the URL linked to.
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*/
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if ( event.shiftKey || isInternalJumpLink ) {
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return;
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}
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self.send( 'scroll', 0 );
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self.send( 'url', link.prop( 'href' ) );
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});
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// You cannot submit forms.
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this.body.on( 'submit.preview', 'form', function( event ) {
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var urlParser;
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/*
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* If the default wasn't prevented already (in which case the form
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* submission is already being handled by JS), and if it has a GET
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* request method, then take the serialized form data and add it as
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* a query string to the action URL and send this in a url message
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* to the customizer pane so that it will be loaded. If the form's
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* action points to a non-previewable URL, the customizer pane's
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* previewUrl setter will reject it so that the form submission is
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* a no-op, which is the same behavior as when clicking a link to an
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* external site in the preview.
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*/
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if ( ! event.isDefaultPrevented() && 'GET' === this.method.toUpperCase() ) {
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urlParser = document.createElement( 'a' );
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urlParser.href = this.action;
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if ( urlParser.search.substr( 1 ).length > 1 ) {
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urlParser.search += '&';
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}
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urlParser.search += $( this ).serialize();
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api.preview.send( 'url', urlParser.href );
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}
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event.preventDefault();
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});
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this.window = $( window );
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this.window.on( 'scroll.preview', debounce( function() {
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self.send( 'scroll', self.window.scrollTop() );
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}, 200 ));
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this.bind( 'scroll', function( distance ) {
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self.window.scrollTop( distance );
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});
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}
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});
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$( function() {
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var bg, setValue;
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api.settings = window._wpCustomizeSettings;
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if ( ! api.settings ) {
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return;
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}
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api.preview = new api.Preview({
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url: window.location.href,
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channel: api.settings.channel
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});
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/**
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* Create/update a setting value.
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*
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* @param {string} id - Setting ID.
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* @param {*} value - Setting value.
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* @param {boolean} [createDirty] - Whether to create a setting as dirty. Defaults to false.
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*/
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setValue = function( id, value, createDirty ) {
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var setting = api( id );
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if ( setting ) {
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setting.set( value );
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} else {
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createDirty = createDirty || false;
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setting = api.create( id, value, {
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id: id
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} );
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// Mark dynamically-created settings as dirty so they will get posted.
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if ( createDirty ) {
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setting._dirty = true;
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}
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}
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};
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api.preview.bind( 'settings', function( values ) {
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$.each( values, setValue );
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});
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api.preview.trigger( 'settings', api.settings.values );
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$.each( api.settings._dirty, function( i, id ) {
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var setting = api( id );
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if ( setting ) {
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setting._dirty = true;
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}
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} );
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api.preview.bind( 'setting', function( args ) {
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var createDirty = true;
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setValue.apply( null, args.concat( createDirty ) );
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});
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api.preview.bind( 'sync', function( events ) {
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$.each( events, function( event, args ) {
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api.preview.trigger( event, args );
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});
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api.preview.send( 'synced' );
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});
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api.preview.bind( 'active', function() {
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api.preview.send( 'nonce', api.settings.nonce );
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api.preview.send( 'documentTitle', document.title );
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});
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api.preview.bind( 'saved', function( response ) {
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api.trigger( 'saved', response );
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} );
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api.bind( 'saved', function() {
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api.each( function( setting ) {
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setting._dirty = false;
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} );
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} );
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api.preview.bind( 'nonce-refresh', function( nonce ) {
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$.extend( api.settings.nonce, nonce );
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} );
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/*
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* Send a message to the parent customize frame with a list of which
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* containers and controls are active.
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*/
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api.preview.send( 'ready', {
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activePanels: api.settings.activePanels,
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activeSections: api.settings.activeSections,
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activeControls: api.settings.activeControls,
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settingValidities: api.settings.settingValidities
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} );
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// Display a loading indicator when preview is reloading, and remove on failure.
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api.preview.bind( 'loading-initiated', function () {
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$( 'body' ).addClass( 'wp-customizer-unloading' );
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});
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api.preview.bind( 'loading-failed', function () {
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$( 'body' ).removeClass( 'wp-customizer-unloading' );
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});
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/* Custom Backgrounds */
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bg = $.map(['color', 'image', 'position_x', 'repeat', 'attachment'], function( prop ) {
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return 'background_' + prop;
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});
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api.when.apply( api, bg ).done( function( color, image, position_x, repeat, attachment ) {
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var body = $(document.body),
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head = $('head'),
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style = $('#custom-background-css'),
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update;
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update = function() {
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var css = '';
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// The body will support custom backgrounds if either
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// the color or image are set.
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//
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// See get_body_class() in /wp-includes/post-template.php
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body.toggleClass( 'custom-background', !! ( color() || image() ) );
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if ( color() )
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css += 'background-color: ' + color() + ';';
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if ( image() ) {
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css += 'background-image: url("' + image() + '");';
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css += 'background-position: top ' + position_x() + ';';
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css += 'background-repeat: ' + repeat() + ';';
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css += 'background-attachment: ' + attachment() + ';';
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}
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// Refresh the stylesheet by removing and recreating it.
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style.remove();
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style = $('<style type="text/css" id="custom-background-css">body.custom-background { ' + css + ' }</style>').appendTo( head );
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};
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$.each( arguments, function() {
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this.bind( update );
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});
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});
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/**
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* Custom Logo
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*
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* Toggle the wp-custom-logo body class when a logo is added or removed.
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*
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* @since 4.5.0
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*/
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api( 'custom_logo', function( setting ) {
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$( 'body' ).toggleClass( 'wp-custom-logo', !! setting.get() );
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setting.bind( function( attachmentId ) {
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$( 'body' ).toggleClass( 'wp-custom-logo', !! attachmentId );
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} );
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} );
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api.trigger( 'preview-ready' );
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});
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})( wp, jQuery );
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