File: public/js/tinymce/src/plugins/codesample/src/main/js/core/FilterContent.js

/**
 * FilterContent.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.codesample.core.FilterContent',
  [
    'tinymce.plugins.codesample.core.Prism',
    'tinymce.plugins.codesample.util.Utils'
  ],
  function (Prism, Utils) {
    var setup = function (editor) {
      var $ = editor.$;

      editor.on('PreProcess', function (e) {
        $('pre[contenteditable=false]', e.node).
          filter(Utils.trimArg(Utils.isCodeSample)).
          each(function (idx, elm) {
            var $elm = $(elm), code = elm.textContent;

            $elm.attr('class', $.trim($elm.attr('class')));
            $elm.removeAttr('contentEditable');

            $elm.empty().append($('<code></code>').each(function () {
              // Needs to be textContent since innerText produces BR:s
              this.textContent = code;
            }));
          });
      });

      editor.on('SetContent', function () {
        var unprocessedCodeSamples = $('pre').filter(Utils.trimArg(Utils.isCodeSample)).filter(function (idx, elm) {
          return elm.contentEditable !== "false";
        });

        if (unprocessedCodeSamples.length) {
          editor.undoManager.transact(function () {
            unprocessedCodeSamples.each(function (idx, elm) {
              $(elm).find('br').each(function (idx, elm) {
                elm.parentNode.replaceChild(editor.getDoc().createTextNode('\n'), elm);
              });

              elm.contentEditable = false;
              elm.innerHTML = editor.dom.encode(elm.textContent);
              Prism.highlightElement(elm);
              elm.className = $.trim(elm.className);
            });
          });
        }
      });
    };

    return {
      setup: setup
    };
  }
);