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File: public/js/tinymce/src/core/src/main/js/dom/DomSerializerFilters.js

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File: public/js/tinymce/src/core/src/main/js/dom/DomSerializerFilters.js
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/**
 * DomSerializerFilters.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.core.dom.DomSerializerFilters',
  [
    'ephox.katamari.api.Arr',
    'tinymce.core.html.Entities'
  ],
  function (Arr, Entities) {
    var register = function (htmlParser, settings, dom) {
      // Convert tabindex back to elements when serializing contents
      htmlParser.addAttributeFilter('data-mce-tabindex', function (nodes, name) {
        var i = nodes.length, node;

        while (i--) {
          node = nodes[i];
          node.attr('tabindex', node.attributes.map['data-mce-tabindex']);
          node.attr(name, null);
        }
      });

      // Convert move data-mce-src, data-mce-href and data-mce-style into nodes or process them if needed
      htmlParser.addAttributeFilter('src,href,style', function (nodes, name) {
        var i = nodes.length, node, value, internalName = 'data-mce-' + name;
        var urlConverter = settings.url_converter, urlConverterScope = settings.url_converter_scope, undef;

        while (i--) {
          node = nodes[i];

          value = node.attributes.map[internalName];
          if (value !== undef) {
            // Set external name to internal value and remove internal
            node.attr(name, value.length > 0 ? value : null);
            node.attr(internalName, null);
          } else {
            // No internal attribute found then convert the value we have in the DOM
            value = node.attributes.map[name];

            if (name === "style") {
              value = dom.serializeStyle(dom.parseStyle(value), node.name);
            } else if (urlConverter) {
              value = urlConverter.call(urlConverterScope, value, name, node.name);
            }

            node.attr(name, value.length > 0 ? value : null);
          }
        }
      });

      // Remove internal classes mceItem<..> or mceSelected
      htmlParser.addAttributeFilter('class', function (nodes) {
        var i = nodes.length, node, value;

        while (i--) {
          node = nodes[i];
          value = node.attr('class');

          if (value) {
            value = node.attr('class').replace(/(?:^|\s)mce-item-\w+(?!\S)/g, '');
            node.attr('class', value.length > 0 ? value : null);
          }
        }
      });

      // Remove bookmark elements
      htmlParser.addAttributeFilter('data-mce-type', function (nodes, name, args) {
        var i = nodes.length, node;

        while (i--) {
          node = nodes[i];

          if (node.attributes.map['data-mce-type'] === 'bookmark' && !args.cleanup) {
            node.remove();
          }
        }
      });

      htmlParser.addNodeFilter('noscript', function (nodes) {
        var i = nodes.length, node;

        while (i--) {
          node = nodes[i].firstChild;

          if (node) {
            node.value = Entities.decode(node.value);
          }
        }
      });

      // Force script into CDATA sections and remove the mce- prefix also add comments around styles
      htmlParser.addNodeFilter('script,style', function (nodes, name) {
        var i = nodes.length, node, value, type;

        var trim = function (value) {
          /*jshint maxlen:255 */
          /*eslint max-len:0 */
          return value.replace(/(<!--\[CDATA\[|\]\]-->)/g, '\n')
            .replace(/^[\r\n]*|[\r\n]*$/g, '')
            .replace(/^\s*((<!--)?(\s*\/\/)?\s*<!\[CDATA\[|(<!--\s*)?\/\*\s*<!\[CDATA\[\s*\*\/|(\/\/)?\s*<!--|\/\*\s*<!--\s*\*\/)\s*[\r\n]*/gi, '')
            .replace(/\s*(\/\*\s*\]\]>\s*\*\/(-->)?|\s*\/\/\s*\]\]>(-->)?|\/\/\s*(-->)?|\]\]>|\/\*\s*-->\s*\*\/|\s*-->\s*)\s*$/g, '');
        };

        while (i--) {
          node = nodes[i];
          value = node.firstChild ? node.firstChild.value : '';

          if (name === "script") {
            // Remove mce- prefix from script elements and remove default type since the user specified
            // a script element without type attribute
            type = node.attr('type');
            if (type) {
              node.attr('type', type === 'mce-no/type' ? null : type.replace(/^mce\-/, ''));
            }

            if (settings.element_format === 'xhtml' && value.length > 0) {
              node.firstChild.value = '// <![CDATA[\n' + trim(value) + '\n// ]]>';
            }
          } else {
            if (settings.element_format === 'xhtml' && value.length > 0) {
              node.firstChild.value = '<!--\n' + trim(value) + '\n-->';
            }
          }
        }
      });

      // Convert comments to cdata and handle protected comments
      htmlParser.addNodeFilter('#comment', function (nodes) {
        var i = nodes.length, node;

        while (i--) {
          node = nodes[i];

          if (node.value.indexOf('[CDATA[') === 0) {
            node.name = '#cdata';
            node.type = 4;
            node.value = node.value.replace(/^\[CDATA\[|\]\]$/g, '');
          } else if (node.value.indexOf('mce:protected ') === 0) {
            node.name = "#text";
            node.type = 3;
            node.raw = true;
            node.value = unescape(node.value).substr(14);
          }
        }
      });

      htmlParser.addNodeFilter('xml:namespace,input', function (nodes, name) {
        var i = nodes.length, node;

        while (i--) {
          node = nodes[i];
          if (node.type === 7) {
            node.remove();
          } else if (node.type === 1) {
            if (name === "input" && !("type" in node.attributes.map)) {
              node.attr('type', 'text');
            }
          }
        }
      });

      htmlParser.addAttributeFilter('data-mce-type', function (nodes) {
        Arr.each(nodes, function (node) {
          if (node.attr('data-mce-type') === 'format-caret') {
            if (node.isEmpty(htmlParser.schema.getNonEmptyElements())) {
              node.remove();
            } else {
              node.unwrap();
            }
          }
        });
      });

      // Remove internal data attributes
      htmlParser.addAttributeFilter(
        'data-mce-src,data-mce-href,data-mce-style,' +
        'data-mce-selected,data-mce-expando,' +
        'data-mce-type,data-mce-resize',

        function (nodes, name) {
          var i = nodes.length;

          while (i--) {
            nodes[i].attr(name, null);
          }
        }
      );
    };

    /**
     * IE 11 has a fantastic bug where it will produce two trailing BR elements to iframe bodies when
     * the iframe is hidden by display: none on a parent container. The DOM is actually out of sync
     * with innerHTML in this case. It's like IE adds shadow DOM BR elements that appears on innerHTML
     * but not as the lastChild of the body. So this fix simply removes the last two
     * BR elements at the end of the document.
     *
     * Example of what happens: <body>text</body> becomes <body>text<br><br></body>
     */
    var trimTrailingBr = function (rootNode) {
      var brNode1, brNode2;

      var isBr = function (node) {
        return node && node.name === 'br';
      };

      brNode1 = rootNode.lastChild;
      if (isBr(brNode1)) {
        brNode2 = brNode1.prev;

        if (isBr(brNode2)) {
          brNode1.remove();
          brNode2.remove();
        }
      }
    };

    return {
      register: register,
      trimTrailingBr: trimTrailingBr
    };
  }
);
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