/**
 * @license AngularJS v1.5.8
 * (c) 2010-2016 Google, Inc. http://angularjs.org
 * License: MIT
 */
(function (window, angular) {
    'use strict';

    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     *     Any commits to this file should be reviewed with security in mind.  *
     *   Changes to this file can potentially create security vulnerabilities. *
     *          An approval from 2 Core members with history of modifying      *
     *                         this file is required.                          *
     *                                                                         *
     *  Does the change somehow allow for arbitrary javascript to be executed? *
     *    Or allows for someone to change the prototype of built-in objects?   *
     *     Or gives undesired access to variables likes document or window?    *
     * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

    var $sanitizeMinErr = angular.$$minErr('$sanitize');
    var bind;
    var extend;
    var forEach;
    var isDefined;
    var lowercase;
    var noop;
    var htmlParser;
    var htmlSanitizeWriter;

    /**
     * @ngdoc module
     * @name ngSanitize
     * @description
     *
     * # ngSanitize
     *
     * The `ngSanitize` module provides functionality to sanitize HTML.
     *
     *
     * <div doc-module-components="ngSanitize"></div>
     *
     * See {@link ngSanitize.$sanitize `$sanitize`} for usage.
     */

    /**
     * @ngdoc service
     * @name $sanitize
     * @kind function
     *
     * @description
     *   Sanitizes an html string by stripping all potentially dangerous tokens.
     *
     *   The input is sanitized by parsing the HTML into tokens. All safe tokens (from a whitelist) are
     *   then serialized back to properly escaped html string. This means that no unsafe input can make
     *   it into the returned string.
     *
     *   The whitelist for URL sanitization of attribute values is configured using the functions
     *   `aHrefSanitizationWhitelist` and `imgSrcSanitizationWhitelist` of {@link ng.$compileProvider
     *   `$compileProvider`}.
     *
     *   The input may also contain SVG markup if this is enabled via {@link $sanitizeProvider}.
     *
     * @param {string} html HTML input.
     * @returns {string} Sanitized HTML.
     *
     * @example
       <example module="sanitizeExample" deps="angular-sanitize.js">
       <file name="index.html">
         <script>
             angular.module('sanitizeExample', ['ngSanitize'])
               .controller('ExampleController', ['$scope', '$sce', function($scope, $sce) {
                 $scope.snippet =
                   '<p style="color:blue">an html\n' +
                   '<em onmouseover="this.textContent=\'PWN3D!\'">click here</em>\n' +
                   'snippet</p>';
                 $scope.deliberatelyTrustDangerousSnippet = function() {
                   return $sce.trustAsHtml($scope.snippet);
                 };
               }]);
         </script>
         <div ng-controller="ExampleController">
            Snippet: <textarea ng-model="snippet" cols="60" rows="3"></textarea>
           <table>
             <tr>
               <td>Directive</td>
               <td>How</td>
               <td>Source</td>
               <td>Rendered</td>
             </tr>
             <tr id="bind-html-with-sanitize">
               <td>ng-bind-html</td>
               <td>Automatically uses $sanitize</td>
               <td><pre>&lt;div ng-bind-html="snippet"&gt;<br/>&lt;/div&gt;</pre></td>
               <td><div ng-bind-html="snippet"></div></td>
             </tr>
             <tr id="bind-html-with-trust">
               <td>ng-bind-html</td>
               <td>Bypass $sanitize by explicitly trusting the dangerous value</td>
               <td>
               <pre>&lt;div ng-bind-html="deliberatelyTrustDangerousSnippet()"&gt;
    &lt;/div&gt;</pre>
               </td>
               <td><div ng-bind-html="deliberatelyTrustDangerousSnippet()"></div></td>
             </tr>
             <tr id="bind-default">
               <td>ng-bind</td>
               <td>Automatically escapes</td>
               <td><pre>&lt;div ng-bind="snippet"&gt;<br/>&lt;/div&gt;</pre></td>
               <td><div ng-bind="snippet"></div></td>
             </tr>
           </table>
           </div>
       </file>
       <file name="protractor.js" type="protractor">
         it('should sanitize the html snippet by default', function() {
           expect(element(by.css('#bind-html-with-sanitize div')).getInnerHtml()).
             toBe('<p>an html\n<em>click here</em>\nsnippet</p>');
         });
    
         it('should inline raw snippet if bound to a trusted value', function() {
           expect(element(by.css('#bind-html-with-trust div')).getInnerHtml()).
             toBe("<p style=\"color:blue\">an html\n" +
                  "<em onmouseover=\"this.textContent='PWN3D!'\">click here</em>\n" +
                  "snippet</p>");
         });
    
         it('should escape snippet without any filter', function() {
           expect(element(by.css('#bind-default div')).getInnerHtml()).
             toBe("&lt;p style=\"color:blue\"&gt;an html\n" +
                  "&lt;em onmouseover=\"this.textContent='PWN3D!'\"&gt;click here&lt;/em&gt;\n" +
                  "snippet&lt;/p&gt;");
         });
    
         it('should update', function() {
           element(by.model('snippet')).clear();
           element(by.model('snippet')).sendKeys('new <b onclick="alert(1)">text</b>');
           expect(element(by.css('#bind-html-with-sanitize div')).getInnerHtml()).
             toBe('new <b>text</b>');
           expect(element(by.css('#bind-html-with-trust div')).getInnerHtml()).toBe(
             'new <b onclick="alert(1)">text</b>');
           expect(element(by.css('#bind-default div')).getInnerHtml()).toBe(
             "new &lt;b onclick=\"alert(1)\"&gt;text&lt;/b&gt;");
         });
       </file>
       </example>
     */


    /**
     * @ngdoc provider
     * @name $sanitizeProvider
     *
     * @description
     * Creates and configures {@link $sanitize} instance.
     */
    function $SanitizeProvider() {
        var svgEnabled = false;

        this.$get = ['$$sanitizeUri', function ($$sanitizeUri) {
            if (svgEnabled) {
                extend(validElements, svgElements);
            }
            return function (html) {
                var buf = [];
                htmlParser(html, htmlSanitizeWriter(buf, function (uri, isImage) {
                    return !/^unsafe:/.test($$sanitizeUri(uri, isImage));
                }));
                return buf.join('');
            };
        }];


        /**
         * @ngdoc method
         * @name $sanitizeProvider#enableSvg
         * @kind function
         *
         * @description
         * Enables a subset of svg to be supported by the sanitizer.
         *
         * <div class="alert alert-warning">
         *   <p>By enabling this setting without taking other precautions, you might expose your
         *   application to click-hijacking attacks. In these attacks, sanitized svg elements could be positioned
         *   outside of the containing element and be rendered over other elements on the page (e.g. a login
         *   link). Such behavior can then result in phishing incidents.</p>
         *
         *   <p>To protect against these, explicitly setup `overflow: hidden` css rule for all potential svg
         *   tags within the sanitized content:</p>
         *
         *   <br>
         *
         *   <pre><code>
         *   .rootOfTheIncludedContent svg {
         *     overflow: hidden !important;
         *   }
         *   </code></pre>
         * </div>
         *
         * @param {boolean=} flag Enable or disable SVG support in the sanitizer.
         * @returns {boolean|ng.$sanitizeProvider} Returns the currently configured value if called
         *    without an argument or self for chaining otherwise.
         */
        this.enableSvg = function (enableSvg) {
            if (isDefined(enableSvg)) {
                svgEnabled = enableSvg;
                return this;
            } else {
                return svgEnabled;
            }
        };

        //////////////////////////////////////////////////////////////////////////////////////////////////
        // Private stuff
        //////////////////////////////////////////////////////////////////////////////////////////////////

        bind = angular.bind;
        extend = angular.extend;
        forEach = angular.forEach;
        isDefined = angular.isDefined;
        lowercase = angular.lowercase;
        noop = angular.noop;

        htmlParser = htmlParserImpl;
        htmlSanitizeWriter = htmlSanitizeWriterImpl;

        // Regular Expressions for parsing tags and attributes
        var SURROGATE_PAIR_REGEXP = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g,
          // Match everything outside of normal chars and " (quote character)
          NON_ALPHANUMERIC_REGEXP = /([^\#-~ |!])/g;


        // Good source of info about elements and attributes
        // http://dev.w3.org/html5/spec/Overview.html#semantics
        // http://simon.html5.org/html-elements

        // Safe Void Elements - HTML5
        // http://dev.w3.org/html5/spec/Overview.html#void-elements
        var voidElements = toMap("area,br,col,hr,img,wbr");

        // Elements that you can, intentionally, leave open (and which close themselves)
        // http://dev.w3.org/html5/spec/Overview.html#optional-tags
        var optionalEndTagBlockElements = toMap("colgroup,dd,dt,li,p,tbody,td,tfoot,th,thead,tr"),
            optionalEndTagInlineElements = toMap("rp,rt"),
            optionalEndTagElements = extend({},
                                                    optionalEndTagInlineElements,
                                                    optionalEndTagBlockElements);

        // Safe Block Elements - HTML5
        var blockElements = extend({}, optionalEndTagBlockElements, toMap("address,article," +
                "aside,blockquote,caption,center,del,dir,div,dl,figure,figcaption,footer,h1,h2,h3,h4,h5," +
                "h6,header,hgroup,hr,ins,map,menu,nav,ol,pre,section,table,ul"));

        // Inline Elements - HTML5
        var inlineElements = extend({}, optionalEndTagInlineElements, toMap("a,abbr,acronym,b," +
                "bdi,bdo,big,br,cite,code,del,dfn,em,font,i,img,ins,kbd,label,map,mark,q,ruby,rp,rt,s," +
                "samp,small,span,strike,strong,sub,sup,time,tt,u,var"));

        // SVG Elements
        // https://wiki.whatwg.org/wiki/Sanitization_rules#svg_Elements
        // Note: the elements animate,animateColor,animateMotion,animateTransform,set are intentionally omitted.
        // They can potentially allow for arbitrary javascript to be executed. See #11290
        var svgElements = toMap("circle,defs,desc,ellipse,font-face,font-face-name,font-face-src,g,glyph," +
                "hkern,image,linearGradient,line,marker,metadata,missing-glyph,mpath,path,polygon,polyline," +
                "radialGradient,rect,stop,svg,switch,text,title,tspan");

        // Blocked Elements (will be stripped)
        var blockedElements = toMap("script,style");

        var validElements = extend({},
                                           voidElements,
                                           blockElements,
                                           inlineElements,
                                           optionalEndTagElements);

        //Attributes that have href and hence need to be sanitized
        var uriAttrs = toMap("background,cite,href,longdesc,src,xlink:href");

        var htmlAttrs = toMap('abbr,align,alt,axis,bgcolor,border,cellpadding,cellspacing,class,clear,' +
            'color,cols,colspan,compact,coords,dir,face,headers,height,hreflang,hspace,' +
            'ismap,lang,language,nohref,nowrap,rel,rev,rows,rowspan,rules,' +
            'scope,scrolling,shape,size,span,start,summary,tabindex,target,title,type,' +
            'valign,value,vspace,width');

        // SVG attributes (without "id" and "name" attributes)
        // https://wiki.whatwg.org/wiki/Sanitization_rules#svg_Attributes
        var svgAttrs = toMap('accent-height,accumulate,additive,alphabetic,arabic-form,ascent,' +
            'baseProfile,bbox,begin,by,calcMode,cap-height,class,color,color-rendering,content,' +
            'cx,cy,d,dx,dy,descent,display,dur,end,fill,fill-rule,font-family,font-size,font-stretch,' +
            'font-style,font-variant,font-weight,from,fx,fy,g1,g2,glyph-name,gradientUnits,hanging,' +
            'height,horiz-adv-x,horiz-origin-x,ideographic,k,keyPoints,keySplines,keyTimes,lang,' +
            'marker-end,marker-mid,marker-start,markerHeight,markerUnits,markerWidth,mathematical,' +
            'max,min,offset,opacity,orient,origin,overline-position,overline-thickness,panose-1,' +
            'path,pathLength,points,preserveAspectRatio,r,refX,refY,repeatCount,repeatDur,' +
            'requiredExtensions,requiredFeatures,restart,rotate,rx,ry,slope,stemh,stemv,stop-color,' +
            'stop-opacity,strikethrough-position,strikethrough-thickness,stroke,stroke-dasharray,' +
            'stroke-dashoffset,stroke-linecap,stroke-linejoin,stroke-miterlimit,stroke-opacity,' +
            'stroke-width,systemLanguage,target,text-anchor,to,transform,type,u1,u2,underline-position,' +
            'underline-thickness,unicode,unicode-range,units-per-em,values,version,viewBox,visibility,' +
            'width,widths,x,x-height,x1,x2,xlink:actuate,xlink:arcrole,xlink:role,xlink:show,xlink:title,' +
            'xlink:type,xml:base,xml:lang,xml:space,xmlns,xmlns:xlink,y,y1,y2,zoomAndPan', true);

        var validAttrs = extend({},
                                        uriAttrs,
                                        svgAttrs,
                                        htmlAttrs);

        function toMap(str, lowercaseKeys) {
            var obj = {}, items = str.split(','), i;
            for (i = 0; i < items.length; i++) {
                obj[lowercaseKeys ? lowercase(items[i]) : items[i]] = true;
            }
            return obj;
        }

        var inertBodyElement;
        (function (window) {
            var doc;
            if (window.document && window.document.implementation) {
                doc = window.document.implementation.createHTMLDocument("inert");
            } else {
                throw $sanitizeMinErr('noinert', "Can't create an inert html document");
            }
            var docElement = doc.documentElement || doc.getDocumentElement();
            var bodyElements = docElement.getElementsByTagName('body');

            // usually there should be only one body element in the document, but IE doesn't have any, so we need to create one
            if (bodyElements.length === 1) {
                inertBodyElement = bodyElements[0];
            } else {
                var html = doc.createElement('html');
                inertBodyElement = doc.createElement('body');
                html.appendChild(inertBodyElement);
                doc.appendChild(html);
            }
        })(window);

        /**
         * @example
         * htmlParser(htmlString, {
         *     start: function(tag, attrs) {},
         *     end: function(tag) {},
         *     chars: function(text) {},
         *     comment: function(text) {}
         * });
         *
         * @param {string} html string
         * @param {object} handler
         */
        function htmlParserImpl(html, handler) {
            if (html === null || html === undefined) {
                html = '';
            } else if (typeof html !== 'string') {
                html = '' + html;
            }
            inertBodyElement.innerHTML = html;

            //mXSS protection
            var mXSSAttempts = 5;
            do {
                if (mXSSAttempts === 0) {
                    throw $sanitizeMinErr('uinput', "Failed to sanitize html because the input is unstable");
                }
                mXSSAttempts--;

                // strip custom-namespaced attributes on IE<=11
                if (window.document.documentMode) {
                    stripCustomNsAttrs(inertBodyElement);
                }
                html = inertBodyElement.innerHTML; //trigger mXSS
                inertBodyElement.innerHTML = html;
            } while (html !== inertBodyElement.innerHTML);

            var node = inertBodyElement.firstChild;
            while (node) {
                switch (node.nodeType) {
                    case 1: // ELEMENT_NODE
                        handler.start(node.nodeName.toLowerCase(), attrToMap(node.attributes));
                        break;
                    case 3: // TEXT NODE
                        handler.chars(node.textContent);
                        break;
                }

                var nextNode;
                if (!(nextNode = node.firstChild)) {
                    if (node.nodeType == 1) {
                        handler.end(node.nodeName.toLowerCase());
                    }
                    nextNode = node.nextSibling;
                    if (!nextNode) {
                        while (nextNode == null) {
                            node = node.parentNode;
                            if (node === inertBodyElement) break;
                            nextNode = node.nextSibling;
                            if (node.nodeType == 1) {
                                handler.end(node.nodeName.toLowerCase());
                            }
                        }
                    }
                }
                node = nextNode;
            }

            while (node = inertBodyElement.firstChild) {
                inertBodyElement.removeChild(node);
            }
        }

        function attrToMap(attrs) {
            var map = {};
            for (var i = 0, ii = attrs.length; i < ii; i++) {
                var attr = attrs[i];
                map[attr.name] = attr.value;
            }
            return map;
        }


        /**
         * Escapes all potentially dangerous characters, so that the
         * resulting string can be safely inserted into attribute or
         * element text.
         * @param value
         * @returns {string} escaped text
         */
        function encodeEntities(value) {
            return value.
              replace(/&/g, '&amp;').
              replace(SURROGATE_PAIR_REGEXP, function (value) {
                  var hi = value.charCodeAt(0);
                  var low = value.charCodeAt(1);
                  return '&#' + (((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000) + ';';
              }).
              replace(NON_ALPHANUMERIC_REGEXP, function (value) {
                  return '&#' + value.charCodeAt(0) + ';';
              }).
              replace(/</g, '&lt;').
              replace(/>/g, '&gt;');
        }

        /**
         * create an HTML/XML writer which writes to buffer
         * @param {Array} buf use buf.join('') to get out sanitized html string
         * @returns {object} in the form of {
         *     start: function(tag, attrs) {},
         *     end: function(tag) {},
         *     chars: function(text) {},
         *     comment: function(text) {}
         * }
         */
        function htmlSanitizeWriterImpl(buf, uriValidator) {
            var ignoreCurrentElement = false;
            var out = bind(buf, buf.push);
            return {
                start: function (tag, attrs) {
                    tag = lowercase(tag);
                    if (!ignoreCurrentElement && blockedElements[tag]) {
                        ignoreCurrentElement = tag;
                    }
                    if (!ignoreCurrentElement && validElements[tag] === true) {
                        out('<');
                        out(tag);
                        forEach(attrs, function (value, key) {
                            var lkey = 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('>');
                    }
                },
                end: function (tag) {
                    tag = lowercase(tag);
                    if (!ignoreCurrentElement && validElements[tag] === true && voidElements[tag] !== true) {
                        out('</');
                        out(tag);
                        out('>');
                    }
                    if (tag == ignoreCurrentElement) {
                        ignoreCurrentElement = false;
                    }
                },
                chars: function (chars) {
                    if (!ignoreCurrentElement) {
                        out(encodeEntities(chars));
                    }
                }
            };
        }


        /**
         * When IE9-11 comes across an unknown namespaced attribute e.g. 'xlink:foo' it adds 'xmlns:ns1' attribute to declare
         * ns1 namespace and prefixes the attribute with 'ns1' (e.g. 'ns1:xlink:foo'). This is undesirable since we don't want
         * to allow any of these custom attributes. This method strips them all.
         *
         * @param node Root element to process
         */
        function stripCustomNsAttrs(node) {
            if (node.nodeType === window.Node.ELEMENT_NODE) {
                var attrs = node.attributes;
                for (var i = 0, l = attrs.length; i < l; i++) {
                    var attrNode = attrs[i];
                    var attrName = attrNode.name.toLowerCase();
                    if (attrName === 'xmlns:ns1' || attrName.lastIndexOf('ns1:', 0) === 0) {
                        node.removeAttributeNode(attrNode);
                        i--;
                        l--;
                    }
                }
            }

            var nextNode = node.firstChild;
            if (nextNode) {
                stripCustomNsAttrs(nextNode);
            }

            nextNode = node.nextSibling;
            if (nextNode) {
                stripCustomNsAttrs(nextNode);
            }
        }
    }

    function sanitizeText(chars) {
        var buf = [];
        var writer = htmlSanitizeWriter(buf, noop);
        writer.chars(chars);
        return buf.join('');
    }


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

    /**
     * @ngdoc filter
     * @name linky
     * @kind 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.
     * @param {object|function(url)} [attributes] Add custom attributes to the link element.
     *
     *    Can be one of:
     *
     *    - `object`: A map of attributes
     *    - `function`: Takes the url as a parameter and returns a map of attributes
     *
     *    If the map of attributes contains a value for `target`, it overrides the value of
     *    the target parameter.
     *
     *
     * @returns {string} Html-linkified and {@link $sanitize sanitized} text.
     *
     * @usage
       <span ng-bind-html="linky_expression | linky"></span>
     *
     * @example
       <example module="linkyExample" deps="angular-sanitize.js">
         <file name="index.html">
           <div ng-controller="ExampleController">
           Snippet: <textarea ng-model="snippet" cols="60" rows="3"></textarea>
           <table>
             <tr>
               <th>Filter</th>
               <th>Source</th>
               <th>Rendered</th>
             </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="snippetWithSingleURL | linky:'_blank'"&gt;<br>&lt;/div&gt;</pre>
              </td>
              <td>
                <div ng-bind-html="snippetWithSingleURL | linky:'_blank'"></div>
              </td>
             </tr>
             <tr id="linky-custom-attributes">
              <td>linky custom attributes</td>
              <td>
                <pre>&lt;div ng-bind-html="snippetWithSingleURL | linky:'_self':{rel: 'nofollow'}"&gt;<br>&lt;/div&gt;</pre>
              </td>
              <td>
                <div ng-bind-html="snippetWithSingleURL | linky:'_self':{rel: 'nofollow'}"></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>
         </file>
         <file name="script.js">
           angular.module('linkyExample', ['ngSanitize'])
             .controller('ExampleController', ['$scope', function($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.snippetWithSingleURL = 'http://angularjs.org/';
             }]);
         </file>
         <file name="protractor.js" type="protractor">
           it('should linkify the snippet with urls', function() {
             expect(element(by.id('linky-filter')).element(by.binding('snippet | linky')).getText()).
                 toBe('Pretty text with some links: http://angularjs.org/, us@somewhere.org, ' +
                      'another@somewhere.org, and one more: ftp://127.0.0.1/.');
             expect(element.all(by.css('#linky-filter a')).count()).toEqual(4);
           });
    
           it('should not linkify snippet without the linky filter', function() {
             expect(element(by.id('escaped-html')).element(by.binding('snippet')).getText()).
                 toBe('Pretty text with some links: http://angularjs.org/, mailto:us@somewhere.org, ' +
                      'another@somewhere.org, and one more: ftp://127.0.0.1/.');
             expect(element.all(by.css('#escaped-html a')).count()).toEqual(0);
           });
    
           it('should update', function() {
             element(by.model('snippet')).clear();
             element(by.model('snippet')).sendKeys('new http://link.');
             expect(element(by.id('linky-filter')).element(by.binding('snippet | linky')).getText()).
                 toBe('new http://link.');
             expect(element.all(by.css('#linky-filter a')).count()).toEqual(1);
             expect(element(by.id('escaped-html')).element(by.binding('snippet')).getText())
                 .toBe('new http://link.');
           });
    
           it('should work with the target property', function() {
            expect(element(by.id('linky-target')).
                element(by.binding("snippetWithSingleURL | linky:'_blank'")).getText()).
                toBe('http://angularjs.org/');
            expect(element(by.css('#linky-target a')).getAttribute('target')).toEqual('_blank');
           });
    
           it('should optionally add custom attributes', function() {
            expect(element(by.id('linky-custom-attributes')).
                element(by.binding("snippetWithSingleURL | linky:'_self':{rel: 'nofollow'}")).getText()).
                toBe('http://angularjs.org/');
            expect(element(by.css('#linky-custom-attributes a')).getAttribute('rel')).toEqual('nofollow');
           });
         </file>
       </example>
     */
    angular.module('ngSanitize').filter('linky', ['$sanitize', function ($sanitize) {
        var LINKY_URL_REGEXP =
              /((ftp|https?):\/\/|(www\.)|(mailto:)?[A-Za-z0-9._%+-]+@)\S*[^\s.;,(){}<>"\u201d\u2019]/i,
            MAILTO_REGEXP = /^mailto:/i;

        var linkyMinErr = angular.$$minErr('linky');
        var isDefined = angular.isDefined;
        var isFunction = angular.isFunction;
        var isObject = angular.isObject;
        var isString = angular.isString;

        return function (text, target, attributes) {
            if (text == null || text === '') return text;
            if (!isString(text)) throw linkyMinErr('notstring', 'Expected string but received: {0}', text);

            var attributesFn =
              isFunction(attributes) ? attributes :
              isObject(attributes) ? function getAttributesObject() { return attributes; } :
              function getEmptyAttributesObject() { return {}; };

            var match;
            var raw = text;
            var html = [];
            var url;
            var i;
            while ((match = raw.match(LINKY_URL_REGEXP))) {
                // We can not end in these as they are sometimes found at the end of the sentence
                url = match[0];
                // if we did not match ftp/http/www/mailto then assume mailto
                if (!match[2] && !match[4]) {
                    url = (match[3] ? 'http://' : 'mailto:') + url;
                }
                i = match.index;
                addText(raw.substr(0, i));
                addLink(url, match[0].replace(MAILTO_REGEXP, ''));
                raw = raw.substring(i + match[0].length);
            }
            addText(raw);
            return $sanitize(html.join(''));

            function addText(text) {
                if (!text) {
                    return;
                }
                html.push(sanitizeText(text));
            }

            function addLink(url, text) {
                var key, linkAttributes = attributesFn(url);
                html.push('<a ');

                for (key in linkAttributes) {
                    html.push(key + '="' + linkAttributes[key] + '" ');
                }

                if (isDefined(target) && !('target' in linkAttributes)) {
                    html.push('target="',
                              target,
                              '" ');
                }
                html.push('href="',
                          url.replace(/"/g, '&quot;'),
                          '">');
                addText(text);
                html.push('</a>');
            }
        };
    }]);


})(window, window.angular);