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/* global wpforms_settings */ /** * WPForms Iframe Helper for displaying сontent. * * @since 1.9.2 */ window.WPFormsIframe = window.WPFormsIframe || ( function( document ) { /** * Public functions and properties. * * @since 1.9.2 * * @type {Object} */ const app = { /** * Create an iframe from a div inside. * * @since 1.9.2 * * @param {Object} options Options for the iframe element. * @param {string} options.color Value for the `color` css-property for <head> inside <iframe>. * * @this {HTMLDivElement} */ update( options = {} ) { const iframeWrapper = this; // Prevent double-execution. if ( iframeWrapper.classList.contains( 'wpforms-iframe-updated' ) ) { return; } iframeWrapper.classList.add( 'wpforms-iframe-updated' ); const iframe = document.createElement( 'iframe' ); iframe.onload = function() { app.iframeStyles( iframe, options ); app.iframeBody( iframe, iframeWrapper.innerHTML ); app.iframeFullHeight( iframe ); iframeWrapper.remove(); }; iframeWrapper.after( iframe ); }, /** * Add styles to an iframe. * * @since 1.9.2 * * @param {HTMLIFrameElement} iframe Iframe element. * @param {Object} options Options for the iframe element. * @param {string} options.color Value for the `color` css-property for <head> inside <iframe>. */ iframeStyles( iframe, options = {} ) { const doc = iframe.contentWindow.document, head = doc.querySelector( 'head' ), style = doc.createElement( 'style' ), font = getComputedStyle( document.body ).fontFamily, { color = 'inherit' } = options; style.setAttribute( 'type', 'text/css' ); style.innerHTML = 'body.mce-content-body {' + ' margin: 0 !important;' + ' background-color: transparent !important;' + ' font-family: ' + font + ';' + ' color: ' + color + ';' + '}' + '*:first-child {' + ' margin-top: 0' + '}' + '*:last-child {' + ' margin-bottom: 0' + '}' + 'pre {' + ' white-space: pre !important;' + ' overflow-x: auto !important;' + '}' + 'a,' + 'img {' + ' display: inline-block;' + '}'; head.appendChild( style ); app.entryPreviewAddLinkElement( iframe ); }, /** * Maybe add link elements to an Entry Preview iframe. * * @since 1.9.2 * * @param {HTMLIFrameElement} iframe Iframe element. */ entryPreviewAddLinkElement( iframe ) { if ( ! wpforms_settings.entry_preview_iframe_styles ) { return; } const doc = iframe.contentWindow.document, head = doc.querySelector( 'head' ); wpforms_settings.entry_preview_iframe_styles.forEach( function( src ) { const link = doc.createElement( 'link' ); link.setAttribute( 'rel', 'stylesheet' ); link.setAttribute( 'href', src ); link.onload = function() { app.iframeFullHeight( iframe ); }; head.appendChild( link ); } ); }, /** * Add HTML elements to an iframe. * * @since 1.9.2 * * @param {HTMLIFrameElement} iframe Iframe element. * @param {string} html HTML. */ iframeBody( iframe, html ) { const doc = iframe.contentWindow.document, body = doc.querySelector( 'body' ), wrapper = doc.createElement( 'div' ); wrapper.classList.add( 'wpforms-iframe-wrapper' ); body.append( wrapper ); wrapper.innerHTML = html; body.classList.add( 'mce-content-body' ); body.querySelectorAll( 'a' ).forEach( function( el ) { el.setAttribute( 'rel', 'noopener' ); if ( ! el.hasAttribute( 'target' ) ) { el.setAttribute( 'target', '_top' ); } } ); body.querySelectorAll( 'table' )?.forEach?.( function( tableEl ) { tableEl.classList.add( 'mce-item-table' ); } ); }, /** * Set full height for an iframe. * * @since 1.9.2 * * @param {HTMLIFrameElement} iframe Iframe element. */ iframeFullHeight( iframe ) { if ( ! iframe.contentWindow || ! iframe.contentWindow.document ) { return; } const doc = iframe.contentWindow.document, wrapper = doc.querySelector( '.wpforms-iframe-wrapper' ); iframe.style.height = wrapper.scrollHeight + 'px'; }, }; return app; }( document ) );
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