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File: Sanitize.js

/**
 * Sanitize.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.media.core.Sanitize',
  [
    'tinymce.core.util.Tools',
    'tinymce.core.html.Writer',
    'tinymce.core.html.SaxParser',
    'tinymce.core.html.Schema'
  ],
  function (Tools, Writer, SaxParser, Schema) {
    var sanitize = function (editor, html) {
      if (editor.settings.media_filter_html === false) {
        return html;
      }

      var writer = new Writer();
      var blocked;

      new SaxParser({
        validate: false,
        allow_conditional_comments: false,
        special: 'script,noscript',

        comment: function (text) {
          writer.comment(text);
        },

        cdata: function (text) {
          writer.cdata(text);
        },

        text: function (text, raw) {
          writer.text(text, raw);
        },

        start: function (name, attrs, empty) {
          blocked = true;

          if (name === 'script' || name === 'noscript') {
            return;
          }

          for (var i = 0; i < attrs.length; i++) {
            if (attrs[i].name.indexOf('on') === 0) {
              return;
            }

            if (attrs[i].name === 'style') {
              attrs[i].value = editor.dom.serializeStyle(editor.dom.parseStyle(attrs[i].value), name);
            }
          }

          writer.start(name, attrs, empty);
          blocked = false;
        },

        end: function (name) {
          if (blocked) {
            return;
          }

          writer.end(name);
        }
      }, new Schema({})).parse(html);

      return writer.getContent();
    };

    return {
      sanitize: sanitize
    };
  }
);