801 lines
23 KiB
JavaScript
801 lines
23 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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currentHistoryState = {};
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/*
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* Capture the state that is passed into history.replaceState() and history.pushState()
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* and also which is returned in the popstate event so that when the changeset_uuid
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* gets updated when transitioning to a new changeset there the current state will
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* be supplied in the call to history.replaceState().
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*/
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( function( history ) {
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var injectUrlWithState;
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if ( ! history.replaceState ) {
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return;
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}
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/**
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* Amend the supplied URL with the customized state.
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*
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* @since 4.7.0
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* @access private
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*
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* @param {string} url URL.
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* @returns {string} URL with customized state.
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*/
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injectUrlWithState = function( url ) {
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var urlParser, queryParams;
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urlParser = document.createElement( 'a' );
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urlParser.href = url;
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queryParams = api.utils.parseQueryString( urlParser.search.substr( 1 ) );
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queryParams.customize_changeset_uuid = api.settings.changeset.uuid;
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if ( ! api.settings.theme.active ) {
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queryParams.customize_theme = api.settings.theme.stylesheet;
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}
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if ( api.settings.theme.channel ) {
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queryParams.customize_messenger_channel = api.settings.channel;
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}
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urlParser.search = $.param( queryParams );
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return url;
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};
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history.replaceState = ( function( nativeReplaceState ) {
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return function historyReplaceState( data, title, url ) {
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currentHistoryState = data;
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return nativeReplaceState.call( history, data, title, injectUrlWithState( url ) );
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};
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} )( history.replaceState );
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history.pushState = ( function( nativePushState ) {
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return function historyPushState( data, title, url ) {
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currentHistoryState = data;
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return nativePushState.call( history, data, title, injectUrlWithState( url ) );
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};
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} )( history.pushState );
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window.addEventListener( 'popstate', function( event ) {
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currentHistoryState = event.state;
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} );
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}( history ) );
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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 preview = this, urlParser = document.createElement( 'a' );
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api.Messenger.prototype.initialize.call( preview, params, options );
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urlParser.href = preview.origin();
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preview.add( 'scheme', urlParser.protocol.replace( /:$/, '' ) );
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preview.body = $( document.body );
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preview.body.on( 'click.preview', 'a', function( event ) {
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preview.handleLinkClick( event );
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} );
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preview.body.on( 'submit.preview', 'form', function( event ) {
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preview.handleFormSubmit( event );
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} );
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preview.window = $( window );
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if ( api.settings.channel ) {
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preview.window.on( 'scroll.preview', debounce( function() {
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preview.send( 'scroll', preview.window.scrollTop() );
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}, 200 ) );
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preview.bind( 'scroll', function( distance ) {
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preview.window.scrollTop( distance );
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});
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}
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},
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/**
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* Handle link clicks in preview.
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*
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* @since 4.7.0
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*
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* @param {jQuery.Event} event Event.
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*/
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handleLinkClick: function( event ) {
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var preview = this, link, isInternalJumpLink;
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link = $( event.target );
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// No-op if the anchor is not a link.
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if ( _.isUndefined( link.attr( 'href' ) ) ) {
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return;
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}
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isInternalJumpLink = ( '#' === link.attr( 'href' ).substr( 0, 1 ) );
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// Allow internal jump links to behave normally without preventing default.
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if ( isInternalJumpLink ) {
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return;
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}
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// If the link is not previewable, prevent the browser from navigating to it.
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if ( ! api.isLinkPreviewable( link[0] ) ) {
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wp.a11y.speak( api.settings.l10n.linkUnpreviewable );
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event.preventDefault();
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return;
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}
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// If not in an iframe, then allow the link click to proceed normally since the state query params are added.
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if ( ! api.settings.channel ) {
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return;
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}
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// Prevent initiating navigating from click and instead rely on sending url message to pane.
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event.preventDefault();
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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 ) {
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return;
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}
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// Note: It's not relevant to send scroll because sending url message will have the same effect.
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preview.send( 'url', link.prop( 'href' ) );
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},
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/**
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* Handle form submit.
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*
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* @since 4.7.0
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*
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* @param {jQuery.Event} event Event.
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*/
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handleFormSubmit: function( event ) {
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var preview = this, urlParser, form;
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urlParser = document.createElement( 'a' );
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form = $( event.target );
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urlParser.href = form.prop( 'action' );
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// If the link is not previewable, prevent the browser from navigating to it.
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if ( 'GET' !== form.prop( 'method' ).toUpperCase() || ! api.isLinkPreviewable( urlParser ) ) {
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wp.a11y.speak( api.settings.l10n.formUnpreviewable );
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event.preventDefault();
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return;
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}
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// If not in an iframe, then allow the form submission to proceed normally with the state inputs injected.
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if ( ! api.settings.channel ) {
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return;
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}
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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() ) {
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if ( urlParser.search.length > 1 ) {
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urlParser.search += '&';
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}
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urlParser.search += form.serialize();
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preview.send( 'url', urlParser.href );
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}
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// Prevent default since navigation should be done via sending url message or via JS submit handler.
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event.preventDefault();
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}
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});
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/**
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* Inject the changeset UUID into links in the document.
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*
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* @since 4.7.0
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* @access protected
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*
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* @access private
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* @returns {void}
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*/
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api.addLinkPreviewing = function addLinkPreviewing() {
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var linkSelectors = 'a[href], area';
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// Inject links into initial document.
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$( document.body ).find( linkSelectors ).each( function() {
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api.prepareLinkPreview( this );
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} );
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// Inject links for new elements added to the page.
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if ( 'undefined' !== typeof MutationObserver ) {
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api.mutationObserver = new MutationObserver( function( mutations ) {
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_.each( mutations, function( mutation ) {
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$( mutation.target ).find( linkSelectors ).each( function() {
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api.prepareLinkPreview( this );
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} );
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} );
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} );
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api.mutationObserver.observe( document.documentElement, {
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childList: true,
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subtree: true
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} );
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} else {
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// If mutation observers aren't available, fallback to just-in-time injection.
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$( document.documentElement ).on( 'click focus mouseover', linkSelectors, function() {
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api.prepareLinkPreview( this );
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} );
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}
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};
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/**
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* Should the supplied link is previewable.
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*
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* @since 4.7.0
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* @access public
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*
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* @param {HTMLAnchorElement|HTMLAreaElement} element Link element.
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* @param {string} element.search Query string.
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* @param {string} element.pathname Path.
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* @param {string} element.host Host.
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* @param {object} [options]
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* @param {object} [options.allowAdminAjax=false] Allow admin-ajax.php requests.
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* @returns {boolean} Is appropriate for changeset link.
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*/
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api.isLinkPreviewable = function isLinkPreviewable( element, options ) {
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var matchesAllowedUrl, parsedAllowedUrl, args;
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args = _.extend( {}, { allowAdminAjax: false }, options || {} );
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if ( 'javascript:' === element.protocol ) { // jshint ignore:line
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return true;
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}
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// Only web URLs can be previewed.
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if ( 'https:' !== element.protocol && 'http:' !== element.protocol ) {
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return false;
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}
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parsedAllowedUrl = document.createElement( 'a' );
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matchesAllowedUrl = ! _.isUndefined( _.find( api.settings.url.allowed, function( allowedUrl ) {
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parsedAllowedUrl.href = allowedUrl;
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return parsedAllowedUrl.protocol === element.protocol && parsedAllowedUrl.host === element.host && 0 === element.pathname.indexOf( parsedAllowedUrl.pathname.replace( /\/$/, '' ) );
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} ) );
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if ( ! matchesAllowedUrl ) {
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return false;
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}
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// Skip wp login and signup pages.
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if ( /\/wp-(login|signup)\.php$/.test( element.pathname ) ) {
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return false;
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}
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// Allow links to admin ajax as faux frontend URLs.
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if ( /\/wp-admin\/admin-ajax\.php$/.test( element.pathname ) ) {
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return args.allowAdminAjax;
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}
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// Disallow links to admin, includes, and content.
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if ( /\/wp-(admin|includes|content)(\/|$)/.test( element.pathname ) ) {
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return false;
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}
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return true;
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};
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/**
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* Inject the customize_changeset_uuid query param into links on the frontend.
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*
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* @since 4.7.0
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* @access protected
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*
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* @param {HTMLAnchorElement|HTMLAreaElement} element Link element.
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* @param {string} element.search Query string.
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* @param {string} element.host Host.
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* @param {string} element.protocol Protocol.
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* @returns {void}
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*/
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api.prepareLinkPreview = function prepareLinkPreview( element ) {
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var queryParams;
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// Skip links in admin bar.
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if ( $( element ).closest( '#wpadminbar' ).length ) {
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return;
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}
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// Ignore links with href="#" or href="#id".
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if ( '#' === $( element ).attr( 'href' ).substr( 0, 1 ) ) {
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return;
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}
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// Make sure links in preview use HTTPS if parent frame uses HTTPS.
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if ( 'https' === api.preview.scheme.get() && 'http:' === element.protocol && -1 !== api.settings.url.allowedHosts.indexOf( element.host ) ) {
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element.protocol = 'https:';
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}
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if ( ! api.isLinkPreviewable( element ) ) {
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$( element ).addClass( 'customize-unpreviewable' );
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return;
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}
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$( element ).removeClass( 'customize-unpreviewable' );
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queryParams = api.utils.parseQueryString( element.search.substring( 1 ) );
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queryParams.customize_changeset_uuid = api.settings.changeset.uuid;
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if ( ! api.settings.theme.active ) {
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queryParams.customize_theme = api.settings.theme.stylesheet;
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}
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if ( api.settings.channel ) {
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queryParams.customize_messenger_channel = api.settings.channel;
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}
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element.search = $.param( queryParams );
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// Prevent links from breaking out of preview iframe.
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if ( api.settings.channel ) {
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element.target = '_self';
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}
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};
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/**
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* Inject the changeset UUID into Ajax requests.
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*
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* @since 4.7.0
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* @access protected
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*
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* @return {void}
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*/
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api.addRequestPreviewing = function addRequestPreviewing() {
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/**
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* Rewrite Ajax requests to inject customizer state.
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*
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* @param {object} options Options.
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* @param {string} options.type Type.
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* @param {string} options.url URL.
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* @param {object} originalOptions Original options.
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* @param {XMLHttpRequest} xhr XHR.
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* @returns {void}
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*/
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var prefilterAjax = function( options, originalOptions, xhr ) {
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var urlParser, queryParams, requestMethod, dirtyValues = {};
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urlParser = document.createElement( 'a' );
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urlParser.href = options.url;
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// Abort if the request is not for this site.
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if ( ! api.isLinkPreviewable( urlParser, { allowAdminAjax: true } ) ) {
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return;
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}
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queryParams = api.utils.parseQueryString( urlParser.search.substring( 1 ) );
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// Note that _dirty flag will be cleared with changeset updates.
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api.each( function( setting ) {
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if ( setting._dirty ) {
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dirtyValues[ setting.id ] = setting.get();
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}
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} );
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if ( ! _.isEmpty( dirtyValues ) ) {
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requestMethod = options.type.toUpperCase();
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// Override underlying request method to ensure unsaved changes to changeset can be included (force Backbone.emulateHTTP).
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if ( 'POST' !== requestMethod ) {
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xhr.setRequestHeader( 'X-HTTP-Method-Override', requestMethod );
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queryParams._method = requestMethod;
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options.type = 'POST';
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}
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// Amend the post data with the customized values.
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if ( options.data ) {
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options.data += '&';
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} else {
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options.data = '';
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}
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options.data += $.param( {
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customized: JSON.stringify( dirtyValues )
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} );
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}
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// Include customized state query params in URL.
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queryParams.customize_changeset_uuid = api.settings.changeset.uuid;
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if ( ! api.settings.theme.active ) {
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queryParams.customize_theme = api.settings.theme.stylesheet;
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}
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urlParser.search = $.param( queryParams );
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options.url = urlParser.href;
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};
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$.ajaxPrefilter( prefilterAjax );
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};
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/**
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* Inject changeset UUID into forms, allowing preview to persist through submissions.
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*
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* @since 4.7.0
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* @access protected
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*
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* @returns {void}
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*/
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api.addFormPreviewing = function addFormPreviewing() {
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// Inject inputs for forms in initial document.
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$( document.body ).find( 'form' ).each( function() {
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api.prepareFormPreview( this );
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} );
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// Inject inputs for new forms added to the page.
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if ( 'undefined' !== typeof MutationObserver ) {
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api.mutationObserver = new MutationObserver( function( mutations ) {
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_.each( mutations, function( mutation ) {
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$( mutation.target ).find( 'form' ).each( function() {
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api.prepareFormPreview( this );
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} );
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} );
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} );
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api.mutationObserver.observe( document.documentElement, {
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childList: true,
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subtree: true
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} );
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}
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};
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/**
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* Inject changeset into form inputs.
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*
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* @since 4.7.0
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* @access protected
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*
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* @param {HTMLFormElement} form Form.
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* @returns {void}
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*/
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api.prepareFormPreview = function prepareFormPreview( form ) {
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var urlParser, stateParams = {};
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if ( ! form.action ) {
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form.action = location.href;
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}
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urlParser = document.createElement( 'a' );
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urlParser.href = form.action;
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// Make sure forms in preview use HTTPS if parent frame uses HTTPS.
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if ( 'https' === api.preview.scheme.get() && 'http:' === urlParser.protocol && -1 !== api.settings.url.allowedHosts.indexOf( urlParser.host ) ) {
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urlParser.protocol = 'https:';
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form.action = urlParser.href;
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}
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if ( 'GET' !== form.method.toUpperCase() || ! api.isLinkPreviewable( urlParser ) ) {
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$( form ).addClass( 'customize-unpreviewable' );
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return;
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}
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$( form ).removeClass( 'customize-unpreviewable' );
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stateParams.customize_changeset_uuid = api.settings.changeset.uuid;
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if ( ! api.settings.theme.active ) {
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stateParams.customize_theme = api.settings.theme.stylesheet;
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}
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if ( api.settings.channel ) {
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stateParams.customize_messenger_channel = api.settings.channel;
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}
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_.each( stateParams, function( value, name ) {
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var input = $( form ).find( 'input[name="' + name + '"]' );
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if ( input.length ) {
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input.val( value );
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} else {
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$( form ).prepend( $( '<input>', {
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type: 'hidden',
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name: name,
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value: value
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} ) );
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}
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} );
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// Prevent links from breaking out of preview iframe.
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if ( api.settings.channel ) {
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form.target = '_self';
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}
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};
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/**
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* Watch current URL and send keep-alive (heartbeat) messages to the parent.
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*
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* Keep the customizer pane notified that the preview is still alive
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* and that the user hasn't navigated to a non-customized URL.
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*
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* @since 4.7.0
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* @access protected
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*/
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api.keepAliveCurrentUrl = ( function() {
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var previousPathName = location.pathname,
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previousQueryString = location.search.substr( 1 ),
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previousQueryParams = null,
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stateQueryParams = [ 'customize_theme', 'customize_changeset_uuid', 'customize_messenger_channel' ];
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return function keepAliveCurrentUrl() {
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var urlParser, currentQueryParams;
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// Short-circuit with keep-alive if previous URL is identical (as is normal case).
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if ( previousQueryString === location.search.substr( 1 ) && previousPathName === location.pathname ) {
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api.preview.send( 'keep-alive' );
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return;
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}
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urlParser = document.createElement( 'a' );
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if ( null === previousQueryParams ) {
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urlParser.search = previousQueryString;
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previousQueryParams = api.utils.parseQueryString( previousQueryString );
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_.each( stateQueryParams, function( name ) {
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delete previousQueryParams[ name ];
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} );
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}
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// Determine if current URL minus customized state params and URL hash.
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urlParser.href = location.href;
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currentQueryParams = api.utils.parseQueryString( urlParser.search.substr( 1 ) );
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_.each( stateQueryParams, function( name ) {
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delete currentQueryParams[ name ];
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} );
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if ( previousPathName !== location.pathname || ! _.isEqual( previousQueryParams, currentQueryParams ) ) {
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urlParser.search = $.param( currentQueryParams );
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urlParser.hash = '';
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api.settings.url.self = urlParser.href;
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api.preview.send( 'ready', {
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currentUrl: api.settings.url.self,
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activePanels: api.settings.activePanels,
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activeSections: api.settings.activeSections,
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activeControls: api.settings.activeControls,
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settingValidities: api.settings.settingValidities
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} );
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} else {
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api.preview.send( 'keep-alive' );
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}
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previousQueryParams = currentQueryParams;
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previousQueryString = location.search.substr( 1 );
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previousPathName = location.pathname;
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};
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} )();
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$( 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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api.addLinkPreviewing();
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api.addRequestPreviewing();
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api.addFormPreviewing();
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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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// Send scroll in case of loading via non-refresh.
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api.preview.send( 'scroll', $( window ).scrollTop() );
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});
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api.preview.bind( 'saved', function( response ) {
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if ( response.next_changeset_uuid ) {
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api.settings.changeset.uuid = response.next_changeset_uuid;
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// Update UUIDs in links and forms.
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$( document.body ).find( 'a[href], area' ).each( function() {
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api.prepareLinkPreview( this );
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} );
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$( document.body ).find( 'form' ).each( function() {
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api.prepareFormPreview( this );
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} );
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/*
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* Replace the UUID in the URL. Note that the wrapped history.replaceState()
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* will handle injecting the current api.settings.changeset.uuid into the URL,
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* so this is merely to trigger that logic.
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*/
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if ( history.replaceState ) {
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history.replaceState( currentHistoryState, '', location.href );
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}
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}
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api.trigger( 'saved', response );
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} );
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/*
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* Clear dirty flag for settings when saved to changeset so that they
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* won't be needlessly included in selective refresh or ajax requests.
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*/
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api.preview.bind( 'changeset-saved', function( data ) {
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_.each( data.saved_changeset_values, function( value, settingId ) {
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var setting = api( settingId );
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if ( setting && _.isEqual( setting.get(), value ) ) {
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setting._dirty = false;
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}
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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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currentUrl: api.settings.url.self,
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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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// Send ready when URL changes via JS.
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setInterval( api.keepAliveCurrentUrl, api.settings.timeouts.keepAliveSend );
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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( 'custom_css[' + api.settings.theme.stylesheet + ']', function( value ) {
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value.bind( function( to ) {
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$( '#wp-custom-css' ).text( to );
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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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