text: /**
   * IframeContent.js
   *
   * Released under LGPL License.
   * Copyright (c) 1999-2017 Ephox Corp. All rights reserved
   *
   * License: http://www.tinymce.com/license
   * Contributing: http://www.tinymce.com/contributing
   */
  
  define(
    'tinymce.plugins.preview.ui.IframeContent',
    [
      'tinymce.core.util.Tools'
    ],
    function (Tools) {
      var injectIframeContent = function (editor, iframe, sandbox) {
        var previewHtml, headHtml = '', encode = editor.dom.encode;
  
        headHtml += '<base href="' + encode(editor.documentBaseURI.getURI()) + '">';
  
        Tools.each(editor.contentCSS, function (url) {
          headHtml += '<link type="text/css" rel="stylesheet" href="' + encode(editor.documentBaseURI.toAbsolute(url)) + '">';
        });
  
        var bodyId = editor.settings.body_id || 'tinymce';
        if (bodyId.indexOf('=') !== -1) {
          bodyId = editor.getParam('body_id', '', 'hash');
          bodyId = bodyId[editor.id] || bodyId;
        }
  
        var bodyClass = editor.settings.body_class || '';
        if (bodyClass.indexOf('=') !== -1) {
          bodyClass = editor.getParam('body_class', '', 'hash');
          bodyClass = bodyClass[editor.id] || '';
        }
  
        var preventClicksOnLinksScript = (
          '<script>' +
          'document.addEventListener && document.addEventListener("click", function(e) {' +
          'for (var elm = e.target; elm; elm = elm.parentNode) {' +
          'if (elm.nodeName === "A") {' +
          'e.preventDefault();' +
          '}' +
          '}' +
          '}, false);' +
          '</script> '
        );
  
        var dirAttr = editor.settings.directionality ? ' dir="' + editor.settings.directionality + '"' : '';
  
        previewHtml = (
          '<!DOCTYPE html>' +
          '<html>' +
          '<head>' +
          headHtml +
          '</head>' +
          '<body id="' + encode(bodyId) + '" class="mce-content-body ' + encode(bodyClass) + '"' + encode(dirAttr) + '>' +
          editor.getContent() +
          preventClicksOnLinksScript +
          '</body>' +
          '</html>'
        );
  
        if (!sandbox) {
          // IE 6-11 doesn't support data uris on iframes
          // so I guess they will have to be less secure since we can't sandbox on those
          // TODO: Use sandbox if future versions of IE supports iframes with data: uris.
          var doc = iframe.contentWindow.document;
          doc.open();
          doc.write(previewHtml);
          doc.close();
        } else {
          iframe.src = 'data:text/html;charset=utf-8,' + encodeURIComponent(previewHtml);
        }
      };
  
      return {
        injectIframeContent: injectIframeContent
      };
    }
  );