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injectUrlWithState( url ) : url ); }; } )( history.replaceState ); history.pushState = ( function( nativePushState ) { return function historyPushState( data, title, url ) { currentHistoryState = data; return nativePushState.call( history, data, title, 'string' === typeof url && url.length > 0 ? injectUrlWithState( url ) : url ); }; } )( history.pushState ); window.addEventListener( 'popstate', function( event ) { currentHistoryState = event.state; } ); }( history ) ); /** * 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 ); }; }; /** * @memberOf wp.customize * @alias wp.customize.Preview * * @constructor * @augments wp.customize.Messenger * @augments wp.customize.Class * @mixes wp.customize.Events */ api.Preview = api.Messenger.extend(/** @lends wp.customize.Preview.prototype */{ /** * @param {Object} params - Parameters to configure the messenger. * @param {Object} options - Extend any instance parameter or method with this object. */ initialize: function( params, options ) { var preview = this, urlParser = document.createElement( 'a' ); api.Messenger.prototype.initialize.call( preview, params, options ); urlParser.href = preview.origin(); preview.add( 'scheme', urlParser.protocol.replace( /:$/, '' ) ); preview.body = $( document.body ); preview.window = $( window ); if ( api.settings.channel ) { // If in an iframe, then intercept the link clicks and form submissions. preview.body.on( 'click.preview', 'a', function( event ) { preview.handleLinkClick( event ); } ); preview.body.on( 'submit.preview', 'form', function( event ) { preview.handleFormSubmit( event ); } ); preview.window.on( 'scroll.preview', debounce( function() { preview.send( 'scroll', preview.window.scrollTop() ); }, 200 ) ); preview.bind( 'scroll', function( distance ) { preview.window.scrollTop( distance ); }); } }, /** * Handle link clicks in preview. * * @since 4.7.0 * @access public * * @param {jQuery.Event} event Event. */ handleLinkClick: function( event ) { var preview = this, link, isInternalJumpLink; link = $( event.target ).closest( 'a' ); // No-op if the anchor is not a link. if ( _.isUndefined( link.attr( 'href' ) ) ) { return; } // Allow internal jump links and JS links to behave normally without preventing default. isInternalJumpLink = ( '#' === link.attr( 'href' ).substr( 0, 1 ) ); if ( isInternalJumpLink || ! /^https?:$/.test( link.prop( 'protocol' ) ) ) { return; } // If the link is not previewable, prevent the browser from navigating to it. if ( ! api.isLinkPreviewable( link[0] ) ) { wp.a11y.speak( api.settings.l10n.linkUnpreviewable ); event.preventDefault(); return; } // Prevent initiating navigating from click and instead rely on sending url message to pane. event.preventDefault(); /* * Note the shift key is checked so shift+click on widgets or * nav menu items can just result on focusing on the corresponding * control instead of also navigating to the URL linked to. */ if ( event.shiftKey ) { return; } // Note: It's not relevant to send scroll because sending url message will have the same effect. preview.send( 'url', link.prop( 'href' ) ); }, /** * Handle form submit. * * @since 4.7.0 * @access public * * @param {jQuery.Event} event Event. */ handleFormSubmit: function( event ) { var preview = this, urlParser, form; urlParser = document.createElement( 'a' ); form = $( event.target ); urlParser.href = form.prop( 'action' ); // If the link is not previewable, prevent the browser from navigating to it. if ( 'GET' !== form.prop( 'method' ).toUpperCase() || ! api.isLinkPreviewable( urlParser ) ) { wp.a11y.speak( api.settings.l10n.formUnpreviewable ); event.preventDefault(); return; } /* * If the default wasn't prevented already (in which case the form * submission is already being handled by JS), and if it has a GET * request method, then take the serialized form data and add it as * a query string to the action URL and send this in a url message * to the customizer pane so that it will be loaded. If the form's * action points to a non-previewable URL, the customizer pane's * previewUrl setter will reject it so that the form submission is * a no-op, which is the same behavior as when clicking a link to an * external site in the preview. */ if ( ! event.isDefaultPrevented() ) { if ( urlParser.search.length > 1 ) { urlParser.search += '&'; } urlParser.search += form.serialize(); preview.send( 'url', urlParser.href ); } // Prevent default since navigation should be done via sending url message or via JS submit handler. event.preventDefault(); } }); /** * Inject the changeset UUID into links in the document. * * @since 4.7.0 * @access protected * @access private * * @return {void} */ api.addLinkPreviewing = function addLinkPreviewing() { var linkSelectors = 'a[href], area[href]'; // Inject links into initial document. $( document.body ).find( linkSelectors ).each( function() { api.prepareLinkPreview( this ); } ); // Inject links for new elements added to the page. if ( 'undefined' !== typeof MutationObserver ) { api.mutationObserver = new MutationObserver( function( mutations ) { _.each( mutations, function( mutation ) { $( mutation.target ).find( linkSelectors ).each( function() { api.prepareLinkPreview( this ); } ); } ); } ); api.mutationObserver.observe( document.documentElement, { childList: true, subtree: true } ); } else { // If mutation observers aren't available, fallback to just-in-time injection. $( document.documentElement ).on( 'click focus mouseover', linkSelectors, function() { api.prepareLinkPreview( this ); } ); } }; /** * Should the supplied link is previewable. * * @since 4.7.0 * @access public * * @param {HTMLAnchorElement|HTMLAreaElement} element Link element. * @param {string} element.search Query string. * @param {string} element.pathname Path. * @param {string} element.host Host. * @param {Object} [options] * @param {Object} [options.allowAdminAjax=false] Allow admin-ajax.php requests. * @return {boolean} Is appropriate for changeset link. */ api.isLinkPreviewable = function isLinkPreviewable( element, options ) { var matchesAllowedUrl, parsedAllowedUrl, args, elementHost; args = _.extend( {}, { allowAdminAjax: false }, options || {} ); if ( 'javascript:' === element.protocol ) { // jshint ignore:line return true; } // Only web URLs can be previewed. if ( 'https:' !== element.protocol && 'http:' !== element.protocol ) { return false; } elementHost = element.host.replace( /:(80|443)$/, '' ); parsedAllowedUrl = document.createElement( 'a' ); matchesAllowedUrl = ! _.isUndefined( _.find( api.settings.url.allowed, function( allowedUrl ) { parsedAllowedUrl.href = allowedUrl; return parsedAllowedUrl.protocol === element.protocol && parsedAllowedUrl.host.replace( /:(80|443)$/, '' ) === elementHost && 0 === element.pathname.indexOf( parsedAllowedUrl.pathname.replace( /\/$/, '' ) ); } ) ); if ( ! matchesAllowedUrl ) { return false; } // Skip wp login and signup pages. if ( /\/wp-(login|signup)\.php$/.test( element.pathname ) ) { return false; } // Allow links to admin ajax as faux frontend URLs. if ( /\/wp-admin\/admin-ajax\.php$/.test( element.pathname ) ) { return args.allowAdminAjax; } // Disallow links to admin, includes, and content. if ( /\/wp-(admin|includes|content)(\/|$)/.test( element.pathname ) ) { return false; } return true; }; /** * Inject the customize_changeset_uuid query param into links on the frontend. * * @since 4.7.0 * @access protected * * @param {HTMLAnchorElement|HTMLAreaElement} element Link element. * @param {string} element.search Query string. * @param {string} element.host Host. * @param {string} element.protocol Protocol. * @return {void} */ api.prepareLinkPreview = function prepareLinkPreview( element ) { var queryParams, $element = $( element ); // Skip elements with no href attribute. Check first to avoid more expensive checks down the road. if ( ! element.hasAttribute( 'href' ) ) { return; } // Skip links in admin bar. if ( $element.closest( '#wpadminbar' ).length ) { return; } // Ignore links with href="#", href="#id", or non-HTTP protocols (e.g. javascript: and mailto:). if ( '#' === $element.attr( 'href' ).substr( 0, 1 ) || ! /^https?:$/.test( element.protocol ) ) { return; } // Make sure links in preview use HTTPS if parent frame uses HTTPS. if ( api.settings.channel && 'https' === api.preview.scheme.get() && 'http:' === element.protocol && -1 !== api.settings.url.allowedHosts.indexOf( element.host ) ) { element.protocol = 'https:'; } // Ignore links with class wp-playlist-caption. if ( $element.hasClass( 'wp-playlist-caption' ) ) { return; } if ( ! api.isLinkPreviewable( element ) ) { // Style link as unpreviewable only if previewing in iframe; if previewing on frontend, links will be allowed to work normally. if ( api.settings.channel ) { $element.addClass( 'customize-unpreviewable' ); } return; } $element.removeClass( 'customize-unpreviewable' ); queryParams = api.utils.parseQueryString( element.search.substring( 1 ) ); queryParams.customize_changeset_uuid = api.settings.changeset.uuid; if ( api.settings.changeset.autosaved ) { queryParams.customize_autosaved = 'on'; } if ( ! api.settings.theme.active ) { queryParams.customize_theme = api.settings.theme.stylesheet; } if ( api.settings.channel ) { queryParams.customize_messenger_channel = api.settings.channel; } element.search = $.param( queryParams ); }; /** * Inject the changeset UUID into Ajax requests. * * @since 4.7.0 * @access protected * * @return {void} */ api.addRequestPreviewing = function addRequestPreviewing() { /** * Rewrite Ajax requests to inject customizer state. * * @param {Object} options Options. * @param {string} options.type Type. * @param {string} options.url URL. * @param {Object} originalOptions Original options. * @param {XMLHttpRequest} xhr XHR. * @return {void} */ var prefilterAjax = function( options, originalOptions, xhr ) { var urlParser, queryParams, requestMethod, dirtyValues = {}; urlParser = document.createElement( 'a' ); urlParser.href = options.url; // Abort if the request is not for this site. if ( ! api.isLinkPreviewable( urlParser, { allowAdminAjax: true } ) ) { return; } queryParams = api.utils.parseQueryString( urlParser.search.substring( 1 ) ); // Note that _dirty flag will be cleared with changeset updates. api.each( function( setting ) { if ( setting._dirty ) { dirtyValues[ setting.id ] = setting.get(); } } ); if ( ! _.isEmpty( dirtyValues ) ) { requestMethod = options.type.toUpperCase(); // Override underlying request method to ensure unsaved changes to changeset can be included (force Backbone.emulateHTTP). if ( 'POST' !== requestMethod ) { xhr.setRequestHeader( 'X-HTTP-Method-Override', requestMethod ); queryParams._method = requestMethod; options.type = 'POST'; } // Amend the post data with the customized values. if ( options.data ) { options.data += '&'; } else { options.data = ''; } options.data += $.param( { customized: JSON.stringify( dirtyValues ) } ); } // Include customized state query params in URL. queryParams.customize_changeset_uuid = api.settings.changeset.uuid; if ( api.settings.changeset.autosaved ) { queryParams.customize_autosaved = 'on'; } if ( ! api.settings.theme.active ) { queryParams.customize_theme = api.settings.theme.stylesheet; } // Ensure preview nonce is included with every customized request, to allow post data to be read. queryParams.customize_preview_nonce = api.settings.nonce.preview; urlParser.search = $.param( queryParams ); options.url = urlParser.href; }; $.ajaxPrefilter( prefilterAjax ); }; /** * Inject changeset UUID into forms, allowing preview to persist through submissions. * * @since 4.7.0 * @access protected * * @return {void} */ api.addFormPreviewing = function addFormPreviewing() { // Inject inputs for forms in initial document. $( document.body ).find( 'form' ).each( function() { api.prepareFormPreview( this ); } ); // Inject inputs for new forms added to the page. if ( 'undefined' !== typeof MutationObserver ) { api.mutationObserver = new MutationObserver( function( mutations ) { _.each( mutations, function( mutation ) { $( mutation.target ).find( 'form' ).each( function() { api.prepareFormPreview( this ); } ); } ); } ); api.mutationObserver.observe( document.documentElement, { childList: true, subtree: true } ); } }; /** * Inject changeset into form inputs. * * @since 4.7.0 * @access protected * * @param {HTMLFormElement} form Form. * @return {void} */ api.prepareFormPreview = function prepareFormPreview( form ) { var urlParser, stateParams = {}; if ( ! form.action ) { form.action = location.href; } urlParser = document.createElement( 'a' ); urlParser.href = form.action; // Make sure forms in preview use HTTPS if parent frame uses HTTPS. if ( api.settings.channel && 'https' === api.preview.scheme.get() && 'http:' === urlParser.protocol && -1 !== api.settings.url.allowedHosts.indexOf( urlParser.host ) ) { urlParser.protocol = 'https:'; form.action = urlParser.href; } if ( 'GET' !== form.method.toUpperCase() || ! api.isLinkPreviewable( urlParser ) ) { // Style form as unpreviewable only if previewing in iframe; if previewing on frontend, all forms will be allowed to work normally. if ( api.settings.channel ) { $( form ).addClass( 'customize-unpreviewable' ); } return; } $( form ).removeClass( 'customize-unpreviewable' ); stateParams.customize_changeset_uuid = api.settings.changeset.uuid; if ( api.settings.changeset.autosaved ) { stateParams.customize_autosaved = 'on'; } if ( ! api.settings.theme.active ) { stateParams.customize_theme = api.settings.theme.stylesheet; } if ( api.settings.channel ) { stateParams.customize_messenger_channel = api.settings.channel; } _.each( stateParams, function( value, name ) { var input = $( form ).find( 'input[name="' + name + '"]' ); if ( input.length ) { input.val( value ); } else { $( form ).prepend( $( '', { type: 'hidden', name: name, value: value } ) ); } } ); // Prevent links from breaking out of preview iframe. if ( api.settings.channel ) { form.target = '_self'; } }; /** * Watch current URL and send keep-alive (heartbeat) messages to the parent. * * Keep the customizer pane notified that the preview is still alive * and that the user hasn't navigated to a non-customized URL. * * @since 4.7.0 * @access protected */ api.keepAliveCurrentUrl = ( function() { var previousPathName = location.pathname, previousQueryString = location.search.substr( 1 ), previousQueryParams = null, stateQueryParams = [ 'customize_theme', 'customize_changeset_uuid', 'customize_messenger_channel', 'customize_autosaved' ]; return function keepAliveCurrentUrl() { var urlParser, currentQueryParams; // Short-circuit with keep-alive if previous URL is identical (as is normal case). if ( previousQueryString === location.search.substr( 1 ) && previousPathName === location.pathname ) { api.preview.send( 'keep-alive' ); return; } urlParser = document.createElement( 'a' ); if ( null === previousQueryParams ) { urlParser.search = previousQueryString; previousQueryParams = api.utils.parseQueryString( previousQueryString ); _.each( stateQueryParams, function( name ) { delete previousQueryParams[ name ]; } ); } // Determine if current URL minus customized state params and URL hash. urlParser.href = location.href; currentQueryParams = api.utils.parseQueryString( urlParser.search.substr( 1 ) ); _.each( stateQueryParams, function( name ) { delete currentQueryParams[ name ]; } ); if ( previousPathName !== location.pathname || ! _.isEqual( previousQueryParams, currentQueryParams ) ) { urlParser.search = $.param( currentQueryParams ); urlParser.hash = ''; api.settings.url.self = urlParser.href; api.preview.send( 'ready', { currentUrl: api.settings.url.self, activePanels: api.settings.activePanels, activeSections: api.settings.activeSections, activeControls: api.settings.activeControls, settingValidities: api.settings.settingValidities } ); } else { api.preview.send( 'keep-alive' ); } previousQueryParams = currentQueryParams; previousQueryString = location.search.substr( 1 ); previousPathName = location.pathname; }; } )(); api.settingPreviewHandlers = { /** * Preview changes to custom logo. * * @param {number} attachmentId Attachment ID for custom logo. * @return {void} */ custom_logo: function( attachmentId ) { $( 'body' ).toggleClass( 'wp-custom-logo', !! attachmentId ); }, /** * Preview changes to custom css. * * @param {string} value Custom CSS.. * @return {void} */ custom_css: function( value ) { $( '#wp-custom-css' ).text( value ); }, /** * Preview changes to any of the background settings. * * @return {void} */ background: function() { var css = '', settings = {}; _.each( ['color', 'image', 'preset', 'position_x', 'position_y', 'size', 'repeat', 'attachment'], function( prop ) { settings[ prop ] = api( 'background_' + prop ); } ); /* * The body will support custom backgrounds if either the color or image are set. * * See get_body_class() in /wp-includes/post-template.php */ $( document.body ).toggleClass( 'custom-background', !! ( settings.color() || settings.image() ) ); if ( settings.color() ) { css += 'background-color: ' + settings.color() + ';'; } if ( settings.image() ) { css += 'background-image: url("' + settings.image() + '");'; css += 'background-size: ' + settings.size() + ';'; css += 'background-position: ' + settings.position_x() + ' ' + settings.position_y() + ';'; css += 'background-repeat: ' + settings.repeat() + ';'; css += 'background-attachment: ' + settings.attachment() + ';'; } $( '#custom-background-css' ).text( 'body.custom-background { ' + css + ' }' ); } }; $( function() { var bg, setValue, handleUpdatedChangesetUuid; api.settings = window._wpCustomizeSettings; if ( ! api.settings ) { return; } api.preview = new api.Preview({ url: window.location.href, channel: api.settings.channel }); api.addLinkPreviewing(); api.addRequestPreviewing(); api.addFormPreviewing(); /** * Create/update a setting value. * * @param {string} id - Setting ID. * @param {*} value - Setting value. * @param {boolean} [createDirty] - Whether to create a setting as dirty. Defaults to false. */ setValue = function( id, value, createDirty ) { var setting = api( id ); if ( setting ) { setting.set( value ); } else { createDirty = createDirty || false; setting = api.create( id, value, { id: id } ); // Mark dynamically-created settings as dirty so they will get posted. if ( createDirty ) { setting._dirty = true; } } }; api.preview.bind( 'settings', function( values ) { $.each( values, setValue ); }); api.preview.trigger( 'settings', api.settings.values ); $.each( api.settings._dirty, function( i, id ) { var setting = api( id ); if ( setting ) { setting._dirty = true; } } ); api.preview.bind( 'setting', function( args ) { var createDirty = true; setValue.apply( null, args.concat( createDirty ) ); }); api.preview.bind( 'sync', function( events ) { /* * Delete any settings that already exist locally which haven't been * modified in the controls while the preview was loading. This prevents * situations where the JS value being synced from the pane may differ * from the PHP-sanitized JS value in the preview which causes the * non-sanitized JS value to clobber the PHP-sanitized value. This * is particularly important for selective refresh partials that * have a fallback refresh behavior since infinite refreshing would * result. */ if ( events.settings && events['settings-modified-while-loading'] ) { _.each( _.keys( events.settings ), function( syncedSettingId ) { if ( api.has( syncedSettingId ) && ! events['settings-modified-while-loading'][ syncedSettingId ] ) { delete events.settings[ syncedSettingId ]; } } ); } $.each( events, function( event, args ) { api.preview.trigger( event, args ); }); api.preview.send( 'synced' ); }); api.preview.bind( 'active', function() { api.preview.send( 'nonce', api.settings.nonce ); api.preview.send( 'documentTitle', document.title ); // Send scroll in case of loading via non-refresh. api.preview.send( 'scroll', $( window ).scrollTop() ); }); /** * Handle update to changeset UUID. * * @param {string} uuid - UUID. * @return {void} */ handleUpdatedChangesetUuid = function( uuid ) { api.settings.changeset.uuid = uuid; // Update UUIDs in links and forms. $( document.body ).find( 'a[href], area[href]' ).each( function() { api.prepareLinkPreview( this ); } ); $( document.body ).find( 'form' ).each( function() { api.prepareFormPreview( this ); } ); /* * Replace the UUID in the URL. Note that the wrapped history.replaceState() * will handle injecting the current api.settings.changeset.uuid into the URL, * so this is merely to trigger that logic. */ if ( history.replaceState ) { history.replaceState( currentHistoryState, '', location.href ); } }; api.preview.bind( 'changeset-uuid', handleUpdatedChangesetUuid ); api.preview.bind( 'saved', function( response ) { if ( response.next_changeset_uuid ) { handleUpdatedChangesetUuid( response.next_changeset_uuid ); } api.trigger( 'saved', response ); } ); // Update the URLs to reflect the fact we've started autosaving. api.preview.bind( 'autosaving', function() { if ( api.settings.changeset.autosaved ) { return; } api.settings.changeset.autosaved = true; // Start deferring to any autosave once changeset is updated. $( document.body ).find( 'a[href], area[href]' ).each( function() { api.prepareLinkPreview( this ); } ); $( document.body ).find( 'form' ).each( function() { api.prepareFormPreview( this ); } ); if ( history.replaceState ) { history.replaceState( currentHistoryState, '', location.href ); } } ); /* * Clear dirty flag for settings when saved to changeset so that they * won't be needlessly included in selective refresh or ajax requests. */ api.preview.bind( 'changeset-saved', function( data ) { _.each( data.saved_changeset_values, function( value, settingId ) { var setting = api( settingId ); if ( setting && _.isEqual( setting.get(), value ) ) { setting._dirty = false; } } ); } ); api.preview.bind( 'nonce-refresh', function( nonce ) { $.extend( api.settings.nonce, nonce ); } ); /* * Send a message to the parent customize frame with a list of which * containers and controls are active. */ api.preview.send( 'ready', { currentUrl: api.settings.url.self, activePanels: api.settings.activePanels, activeSections: api.settings.activeSections, activeControls: api.settings.activeControls, settingValidities: api.settings.settingValidities } ); // Send ready when URL changes via JS. setInterval( api.keepAliveCurrentUrl, api.settings.timeouts.keepAliveSend ); // Display a loading indicator when preview is reloading, and remove on failure. api.preview.bind( 'loading-initiated', function () { $( 'body' ).addClass( 'wp-customizer-unloading' ); }); api.preview.bind( 'loading-failed', function () { $( 'body' ).removeClass( 'wp-customizer-unloading' ); }); /* Custom Backgrounds */ bg = $.map( ['color', 'image', 'preset', 'position_x', 'position_y', 'size', 'repeat', 'attachment'], function( prop ) { return 'background_' + prop; } ); api.when.apply( api, bg ).done( function() { $.each( arguments, function() { this.bind( api.settingPreviewHandlers.background ); }); }); /** * Custom Logo * * Toggle the wp-custom-logo body class when a logo is added or removed. * * @since 4.5.0 */ api( 'custom_logo', function ( setting ) { api.settingPreviewHandlers.custom_logo.call( setting, setting.get() ); setting.bind( api.settingPreviewHandlers.custom_logo ); } ); api( 'custom_css[' + api.settings.theme.stylesheet + ']', function( setting ) { setting.bind( api.settingPreviewHandlers.custom_css ); } ); api.trigger( 'preview-ready' ); }); })( wp, jQuery );