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    start: function(tag, attrs, unary){
      tag = angular.lowercase(tag);
      if (!ignore && specialElements[tag]) {
        ignore = tag;
      }
      if (!ignore && validElements[tag] === true) {
        out('<');
        out(tag);
        angular.forEach(attrs, function(value, key){
          var lkey=angular.lowercase(key);
          var isImage = (tag === 'img' && lkey === 'src') || (lkey === 'background');
          if (validAttrs[lkey] === true &&
            (uriAttrs[lkey] !== true || uriValidator(value, isImage))) {
            out(' ');
            out(key);
            out('="');
            out(encodeEntities(value));
            out('"');
          }
        });
        out(unary ? '/>' : '>');
      }
    },
    end: function(tag){
        tag = angular.lowercase(tag);
        if (!ignore && validElements[tag] === true) {
          out('</');
          out(tag);
          out('>');
        }
        if (tag == ignore) {
          ignore = false;
        }
      },
    chars: function(chars){
        if (!ignore) {
          out(encodeEntities(chars));
        }
      }
  };
}


// define ngSanitize module and register $sanitize service
angular.module('ngSanitize', []).provider('$sanitize', $SanitizeProvider);

/* global sanitizeText: false */

/**
 * @ngdoc filter
 * @name ngSanitize.filter:linky
 * @function
 *
 * @description
 * Finds links in text input and turns them into html links. Supports http/https/ftp/mailto and
 * plain email address links.
 *
 * Requires the {@link ngSanitize `ngSanitize`} module to be installed.
 *
 * @param {string} text Input text.
 * @param {string} target Window (_blank|_self|_parent|_top) or named frame to open links in.
 * @returns {string} Html-linkified text.
 *
 * @usage
   <span ng-bind-html="linky_expression | linky"></span>
 *
 * @example
   <doc:example module="ngSanitize">
     <doc:source>
       <script>
         function Ctrl($scope) {
           $scope.snippet =
             'Pretty text with some links:\n'+
             'http://angularjs.org/,\n'+
             'mailto:us@somewhere.org,\n'+
             'another@somewhere.org,\n'+
             'and one more: ftp://127.0.0.1/.';
           $scope.snippetWithTarget = 'http://angularjs.org/';
         }
       </script>
       <div ng-controller="Ctrl">
       Snippet: <textarea ng-model="snippet" cols="60" rows="3"></textarea>
       <table>
         <tr>
           <td>Filter</td>
           <td>Source</td>
           <td>Rendered</td>
         </tr>
         <tr id="linky-filter">
           <td>linky filter</td>
           <td>
             <pre>&lt;div ng-bind-html="snippet | linky"&gt;<br>&lt;/div&gt;</pre>
           </td>
           <td>
             <div ng-bind-html="snippet | linky"></div>
           </td>
         </tr>
         <tr id="linky-target">
          <td>linky target</td>
          <td>
            <pre>&lt;div ng-bind-html="snippetWithTarget | linky:'_blank'"&gt;<br>&lt;/div&gt;</pre>
          </td>
          <td>
            <div ng-bind-html="snippetWithTarget | linky:'_blank'"></div>
          </td>
         </tr>
         <tr id="escaped-html">
           <td>no filter</td>
           <td><pre>&lt;div ng-bind="snippet"&gt;<br>&lt;/div&gt;</pre></td>
           <td><div ng-bind="snippet"></div></td>
         </tr>
       </table>
     </doc:source>
     <doc:scenario>
       it('should linkify the snippet with urls', function() {
         expect(using('#linky-filter').binding('snippet | linky')).
           toBe('Pretty text with some links:&#10;' +
                '<a href="http://angularjs.org/">http://angularjs.org/</a>,&#10;' +
                '<a href="mailto:us@somewhere.org">us@somewhere.org</a>,&#10;' +
                '<a href="mailto:another@somewhere.org">another@somewhere.org</a>,&#10;' +
                'and one more: <a href="ftp://127.0.0.1/">ftp://127.0.0.1/</a>.');