public/bower_components/textAngular/dist/textAngular-sanitize.js

   1 /**
   2  * @license AngularJS v1.3.10
   3  * (c) 2010-2014 Google, Inc. http://angularjs.org
   4  * License: MIT
   5  */
   6 (function(window, angular, undefined) {'use strict';
   7
   8 var $sanitizeMinErr = angular.$$minErr('$sanitize');
   9
  10 /**
  11  * @ngdoc module
  12  * @name ngSanitize
  13  * @description
  14  *
  15  * # ngSanitize
  16  *
  17  * The `ngSanitize` module provides functionality to sanitize HTML.
  18  *
  19  *
  20  * <div doc-module-components="ngSanitize"></div>
  21  *
  22  * See {@link ngSanitize.$sanitize `$sanitize`} for usage.
  23  */
  24
  25 /*
  26  * HTML Parser By Misko Hevery (misko@hevery.com)
  27  * based on:  HTML Parser By John Resig (ejohn.org)
  28  * Original code by Erik Arvidsson, Mozilla Public License
  29  * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
  30  *
  31  * // Use like so:
  32  * htmlParser(htmlString, {
  33  *     start: function(tag, attrs, unary) {},
  34  *     end: function(tag) {},
  35  *     chars: function(text) {},
  36  *     comment: function(text) {}
  37  * });
  38  *
  39  */
  40
  41
  42 /**
  43  * @ngdoc service
  44  * @name $sanitize
  45  * @kind function
  46  *
  47  * @description
  48  *   The input is sanitized by parsing the HTML into tokens. All safe tokens (from a whitelist) are
  49  *   then serialized back to properly escaped html string. This means that no unsafe input can make
  50  *   it into the returned string, however, since our parser is more strict than a typical browser
  51  *   parser, it's possible that some obscure input, which would be recognized as valid HTML by a
  52  *   browser, won't make it through the sanitizer. The input may also contain SVG markup.
  53  *   The whitelist is configured using the functions `aHrefSanitizationWhitelist` and
  54  *   `imgSrcSanitizationWhitelist` of {@link ng.$compileProvider `$compileProvider`}.
  55  *
  56  * @param {string} html HTML input.
  57  * @returns {string} Sanitized HTML.
  58  *
  59  * @example
  60    <example module="sanitizeExample" deps="angular-sanitize.js">
  61    <file name="index.html">
  62      <script>
  63          angular.module('sanitizeExample', ['ngSanitize'])
  64            .controller('ExampleController', ['$scope', '$sce', function($scope, $sce) {
  65              $scope.snippet =
  66                '<p style="color:blue">an html\n' +
  67                '<em onmouseover="this.textContent=\'PWN3D!\'">click here</em>\n' +
  68                'snippet</p>';
  69              $scope.deliberatelyTrustDangerousSnippet = function() {
  70                return $sce.trustAsHtml($scope.snippet);
  71              };
  72            }]);
  73      </script>
  74      <div ng-controller="ExampleController">
  75         Snippet: <textarea ng-model="snippet" cols="60" rows="3"></textarea>
  76        <table>
  77          <tr>
  78            <td>Directive</td>
  79            <td>How</td>
  80            <td>Source</td>
  81            <td>Rendered</td>
  82          </tr>
  83          <tr id="bind-html-with-sanitize">
  84            <td>ng-bind-html</td>
  85            <td>Automatically uses $sanitize</td>
  86            <td><pre>&lt;div ng-bind-html="snippet"&gt;<br/>&lt;/div&gt;</pre></td>
  87            <td><div ng-bind-html="snippet"></div></td>
  88          </tr>
  89          <tr id="bind-html-with-trust">
  90            <td>ng-bind-html</td>
  91            <td>Bypass $sanitize by explicitly trusting the dangerous value</td>
  92            <td>
  93            <pre>&lt;div ng-bind-html="deliberatelyTrustDangerousSnippet()"&gt;
  94 &lt;/div&gt;</pre>
  95            </td>
  96            <td><div ng-bind-html="deliberatelyTrustDangerousSnippet()"></div></td>
  97          </tr>
  98          <tr id="bind-default">
  99            <td>ng-bind</td>
 100            <td>Automatically escapes</td>
 101            <td><pre>&lt;div ng-bind="snippet"&gt;<br/>&lt;/div&gt;</pre></td>
 102            <td><div ng-bind="snippet"></div></td>
 103          </tr>
 104        </table>
 105        </div>
 106    </file>
 107    <file name="protractor.js" type="protractor">
 108      it('should sanitize the html snippet by default', function() {
 109        expect(element(by.css('#bind-html-with-sanitize div')).getInnerHtml()).
 110          toBe('<p>an html\n<em>click here</em>\nsnippet</p>');
 111      });
 112
 113      it('should inline raw snippet if bound to a trusted value', function() {
 114        expect(element(by.css('#bind-html-with-trust div')).getInnerHtml()).
 115          toBe("<p style=\"color:blue\">an html\n" +
 116               "<em onmouseover=\"this.textContent='PWN3D!'\">click here</em>\n" +
 117               "snippet</p>");
 118      });
 119
 120      it('should escape snippet without any filter', function() {
 121        expect(element(by.css('#bind-default div')).getInnerHtml()).
 122          toBe("&lt;p style=\"color:blue\"&gt;an html\n" +
 123               "&lt;em onmouseover=\"this.textContent='PWN3D!'\"&gt;click here&lt;/em&gt;\n" +
 124               "snippet&lt;/p&gt;");
 125      });
 126
 127      it('should update', function() {
 128        element(by.model('snippet')).clear();
 129        element(by.model('snippet')).sendKeys('new <b onclick="alert(1)">text</b>');
 130        expect(element(by.css('#bind-html-with-sanitize div')).getInnerHtml()).
 131          toBe('new <b>text</b>');
 132        expect(element(by.css('#bind-html-with-trust div')).getInnerHtml()).toBe(
 133          'new <b onclick="alert(1)">text</b>');
 134        expect(element(by.css('#bind-default div')).getInnerHtml()).toBe(
 135          "new &lt;b onclick=\"alert(1)\"&gt;text&lt;/b&gt;");
 136      });
 137    </file>
 138    </example>
 139  */
 140 function $SanitizeProvider() {
 141   this.$get = ['$$sanitizeUri', function($$sanitizeUri) {
 142     return function(html) {
 143       if (typeof arguments[1] != 'undefined') {
 144         arguments[1].version = 'taSanitize';
 145       }
 146       var buf = [];
 147       htmlParser(html, htmlSanitizeWriter(buf, function(uri, isImage) {
 148         return !/^unsafe/.test($$sanitizeUri(uri, isImage));
 149       }));
 150       return buf.join('');
 151     };
 152   }];
 153 }
 154
 155 function sanitizeText(chars) {
 156   var buf = [];
 157   var writer = htmlSanitizeWriter(buf, angular.noop);
 158   writer.chars(chars);
 159   return buf.join('');
 160 }
 161
 162
 163 // Regular Expressions for parsing tags and attributes
 164 var START_TAG_REGEXP =
 165        /^<((?:[a-zA-Z])[\w:-]*)((?:\s+[\w:-]+(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)\s*(>?)/,
 166   END_TAG_REGEXP = /^<\/\s*([\w:-]+)[^>]*>/,
 167   ATTR_REGEXP = /([\w:-]+)(?:\s*=\s*(?:(?:"((?:[^"])*)")|(?:'((?:[^'])*)')|([^>\s]+)))?/g,
 168   BEGIN_TAG_REGEXP = /^</,
 169   BEGING_END_TAGE_REGEXP = /^<\//,
 170   COMMENT_REGEXP = /<!--(.*?)-->/g,
 171   SINGLE_COMMENT_REGEXP = /(^<!--.*?-->)/,
 172   DOCTYPE_REGEXP = /<!DOCTYPE([^>]*?)>/i,
 173   CDATA_REGEXP = /<!\[CDATA\[(.*?)]]>/g,
 174   SURROGATE_PAIR_REGEXP = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g,
 175   // Match everything outside of normal chars and " (quote character)
 176   NON_ALPHANUMERIC_REGEXP = /([^\#-~| |!])/g,
 177   WHITE_SPACE_REGEXP = /^(\s+)/;
 178
 179
 180 // Good source of info about elements and attributes
 181 // http://dev.w3.org/html5/spec/Overview.html#semantics
 182 // http://simon.html5.org/html-elements
 183
 184 // Safe Void Elements - HTML5
 185 // http://dev.w3.org/html5/spec/Overview.html#void-elements
 186 var voidElements = makeMap("area,br,col,hr,img,wbr,input");
 187
 188 // Elements that you can, intentionally, leave open (and which close themselves)
 189 // http://dev.w3.org/html5/spec/Overview.html#optional-tags
 190 var optionalEndTagBlockElements = makeMap("colgroup,dd,dt,li,p,tbody,td,tfoot,th,thead,tr"),
 191     optionalEndTagInlineElements = makeMap("rp,rt"),
 192     optionalEndTagElements = angular.extend({},
 193                                             optionalEndTagInlineElements,
 194                                             optionalEndTagBlockElements);
 195
 196 // Safe Block Elements - HTML5
 197 var blockElements = angular.extend({}, optionalEndTagBlockElements, makeMap("address,article," +
 198         "aside,blockquote,caption,center,del,dir,div,dl,figure,figcaption,footer,h1,h2,h3,h4,h5," +
 199         "h6,header,hgroup,hr,ins,map,menu,nav,ol,pre,script,section,table,ul"));
 200
 201 // Inline Elements - HTML5
 202 var inlineElements = angular.extend({}, optionalEndTagInlineElements, makeMap("a,abbr,acronym,b," +
 203         "bdi,bdo,big,br,cite,code,del,dfn,em,font,i,img,ins,kbd,label,map,mark,q,ruby,rp,rt,s," +
 204         "samp,small,span,strike,strong,sub,sup,time,tt,u,var"));
 205
 206 // SVG Elements
 207 // https://wiki.whatwg.org/wiki/Sanitization_rules#svg_Elements
 208 var svgElements = makeMap("animate,animateColor,animateMotion,animateTransform,circle,defs," +
 209         "desc,ellipse,font-face,font-face-name,font-face-src,g,glyph,hkern,image,linearGradient," +
 210         "line,marker,metadata,missing-glyph,mpath,path,polygon,polyline,radialGradient,rect,set," +
 211         "stop,svg,switch,text,title,tspan,use");
 212
 213 // Special Elements (can contain anything)
 214 var specialElements = makeMap("script,style");
 215
 216 var validElements = angular.extend({},
 217                                    voidElements,
 218                                    blockElements,
 219                                    inlineElements,
 220                                    optionalEndTagElements,
 221                                    svgElements);
 222
 223 //Attributes that have href and hence need to be sanitized
 224 var uriAttrs = makeMap("background,cite,href,longdesc,src,usemap,xlink:href");
 225
 226 var htmlAttrs = makeMap('abbr,align,alt,axis,bgcolor,border,cellpadding,cellspacing,class,clear,'+
 227     'color,cols,colspan,compact,coords,dir,face,headers,height,hreflang,hspace,'+
 228     'id,ismap,lang,language,nohref,nowrap,rel,rev,rows,rowspan,rules,'+
 229     'scope,scrolling,shape,size,span,start,summary,target,title,type,'+
 230     'valign,value,vspace,width');
 231
 232 // SVG attributes (without "id" and "name" attributes)
 233 // https://wiki.whatwg.org/wiki/Sanitization_rules#svg_Attributes
 234 var svgAttrs = makeMap('accent-height,accumulate,additive,alphabetic,arabic-form,ascent,' +
 235     'attributeName,attributeType,baseProfile,bbox,begin,by,calcMode,cap-height,class,color,' +
 236     'color-rendering,content,cx,cy,d,dx,dy,descent,display,dur,end,fill,fill-rule,font-family,' +
 237     'font-size,font-stretch,font-style,font-variant,font-weight,from,fx,fy,g1,g2,glyph-name,' +
 238     'gradientUnits,hanging,height,horiz-adv-x,horiz-origin-x,ideographic,k,keyPoints,' +
 239     'keySplines,keyTimes,lang,marker-end,marker-mid,marker-start,markerHeight,markerUnits,' +
 240     'markerWidth,mathematical,max,min,offset,opacity,orient,origin,overline-position,' +
 241     'overline-thickness,panose-1,path,pathLength,points,preserveAspectRatio,r,refX,refY,' +
 242     'repeatCount,repeatDur,requiredExtensions,requiredFeatures,restart,rotate,rx,ry,slope,stemh,' +
 243     'stemv,stop-color,stop-opacity,strikethrough-position,strikethrough-thickness,stroke,' +
 244     'stroke-dasharray,stroke-dashoffset,stroke-linecap,stroke-linejoin,stroke-miterlimit,' +
 245     'stroke-opacity,stroke-width,systemLanguage,target,text-anchor,to,transform,type,u1,u2,' +
 246     'underline-position,underline-thickness,unicode,unicode-range,units-per-em,values,version,' +
 247     'viewBox,visibility,width,widths,x,x-height,x1,x2,xlink:actuate,xlink:arcrole,xlink:role,' +
 248     'xlink:show,xlink:title,xlink:type,xml:base,xml:lang,xml:space,xmlns,xmlns:xlink,y,y1,y2,' +
 249     'zoomAndPan');
 250
 251 var validAttrs = angular.extend({},
 252                                 uriAttrs,
 253                                 svgAttrs,
 254                                 htmlAttrs);
 255
 256 function makeMap(str) {
 257   var obj = {}, items = str.split(','), i;
 258   for (i = 0; i < items.length; i++) obj[items[i]] = true;
 259   return obj;
 260 }
 261
 262
 263 /**
 264  * @example
 265  * htmlParser(htmlString, {
 266  *     start: function(tag, attrs, unary) {},
 267  *     end: function(tag) {},
 268  *     chars: function(text) {},
 269  *     comment: function(text) {}
 270  * });
 271  *
 272  * @param {string} html string
 273  * @param {object} handler
 274  */
 275 function htmlParser(html, handler) {
 276   if (typeof html !== 'string') {
 277     if (html === null || typeof html === 'undefined') {
 278       html = '';
 279     } else {
 280       html = '' + html;
 281     }
 282   }
 283   var index, chars, match, stack = [], last = html, text;
 284   stack.last = function() { return stack[ stack.length - 1 ]; };
 285
 286   while (html) {
 287     text = '';
 288     chars = true;
 289
 290     // Make sure we're not in a script or style element
 291     if (!stack.last() || !specialElements[ stack.last() ]) {
 292
 293       // White space
 294       if (WHITE_SPACE_REGEXP.test(html)) {
 295         match = html.match(WHITE_SPACE_REGEXP);
 296
 297         if (match) {
 298           var mat = match[0];
 299           if (handler.whitespace) handler.whitespace(match[0]);
 300           html = html.replace(match[0], '');
 301           chars = false;
 302         }
 303       //Comment
 304       } else if (SINGLE_COMMENT_REGEXP.test(html)) {
 305         match = html.match(SINGLE_COMMENT_REGEXP);
 306
 307         if (match) {
 308           if (handler.comment) handler.comment(match[1]);
 309           html = html.replace(match[0], '');
 310           chars = false;
 311         }
 312       // DOCTYPE
 313       } else if (DOCTYPE_REGEXP.test(html)) {
 314         match = html.match(DOCTYPE_REGEXP);
 315
 316         if (match) {
 317           html = html.replace(match[0], '');
 318           chars = false;
 319         }
 320       // end tag
 321       } else if (BEGING_END_TAGE_REGEXP.test(html)) {
 322         match = html.match(END_TAG_REGEXP);
 323
 324         if (match) {
 325           html = html.substring(match[0].length);
 326           match[0].replace(END_TAG_REGEXP, parseEndTag);
 327           chars = false;
 328         }
 329
 330       // start tag
 331       } else if (BEGIN_TAG_REGEXP.test(html)) {
 332         match = html.match(START_TAG_REGEXP);
 333
 334         if (match) {
 335           // We only have a valid start-tag if there is a '>'.
 336           if (match[4]) {
 337             html = html.substring(match[0].length);
 338             match[0].replace(START_TAG_REGEXP, parseStartTag);
 339           }
 340           chars = false;
 341         } else {
 342           // no ending tag found --- this piece should be encoded as an entity.
 343           text += '<';
 344           html = html.substring(1);
 345         }
 346       }
 347
 348       if (chars) {
 349         index = html.indexOf("<");
 350
 351         text += index < 0 ? html : html.substring(0, index);
 352         html = index < 0 ? "" : html.substring(index);
 353
 354         if (handler.chars) handler.chars(decodeEntities(text));
 355       }
 356
 357     } else {
 358       html = html.replace(new RegExp("([^]*)<\\s*\\/\\s*" + stack.last() + "[^>]*>", 'i'),
 359         function(all, text) {
 360           text = text.replace(COMMENT_REGEXP, "$1").replace(CDATA_REGEXP, "$1");
 361
 362           if (handler.chars) handler.chars(decodeEntities(text));
 363
 364           return "";
 365       });
 366
 367       parseEndTag("", stack.last());
 368     }
 369
 370     if (html == last) {
 371       throw $sanitizeMinErr('badparse', "The sanitizer was unable to parse the following block " +
 372                                         "of html: {0}", html);
 373     }
 374     last = html;
 375   }
 376
 377   // Clean up any remaining tags
 378   parseEndTag();
 379
 380   function parseStartTag(tag, tagName, rest, unary) {
 381     tagName = angular.lowercase(tagName);
 382     if (blockElements[ tagName ]) {
 383       while (stack.last() && inlineElements[ stack.last() ]) {
 384         parseEndTag("", stack.last());
 385       }
 386     }
 387
 388     if (optionalEndTagElements[ tagName ] && stack.last() == tagName) {
 389       parseEndTag("", tagName);
 390     }
 391
 392     unary = voidElements[ tagName ] || !!unary;
 393
 394     if (!unary)
 395       stack.push(tagName);
 396
 397     var attrs = {};
 398
 399     rest.replace(ATTR_REGEXP,
 400       function(match, name, doubleQuotedValue, singleQuotedValue, unquotedValue) {
 401         var value = doubleQuotedValue
 402           || singleQuotedValue
 403           || unquotedValue
 404           || '';
 405
 406         attrs[name] = decodeEntities(value);
 407     });
 408     if (handler.start) handler.start(tagName, attrs, unary);
 409   }
 410
 411   function parseEndTag(tag, tagName) {
 412     var pos = 0, i;
 413     tagName = angular.lowercase(tagName);
 414     if (tagName)
 415       // Find the closest opened tag of the same type
 416       for (pos = stack.length - 1; pos >= 0; pos--)
 417         if (stack[ pos ] == tagName)
 418           break;
 419
 420     if (pos >= 0) {
 421       // Close all the open elements, up the stack
 422       for (i = stack.length - 1; i >= pos; i--)
 423         if (handler.end) handler.end(stack[ i ]);
 424
 425       // Remove the open elements from the stack
 426       stack.length = pos;
 427     }
 428   }
 429 }
 430
 431 var hiddenPre=document.createElement("pre");
 432 var spaceRe = /^(\s*)([\s\S]*?)(\s*)$/;
 433 /**
 434  * decodes all entities into regular string
 435  * @param value
 436  * @returns {string} A string with decoded entities.
 437  */
 438 function decodeEntities(value) {
 439   if (!value) { return ''; }
 440
 441   // Note: IE8 does not preserve spaces at the start/end of innerHTML
 442   // so we must capture them and reattach them afterward
 443   var parts = spaceRe.exec(value);
 444   var spaceBefore = parts[1];
 445   var spaceAfter = parts[3];
 446   var content = parts[2];
 447   if (content) {
 448     hiddenPre.innerHTML=content.replace(/</g,"&lt;");
 449     // innerText depends on styling as it doesn't display hidden elements.
 450     // Therefore, it's better to use textContent not to cause unnecessary
 451     // reflows. However, IE<9 don't support textContent so the innerText
 452     // fallback is necessary.
 453     content = 'textContent' in hiddenPre ?
 454       hiddenPre.textContent : hiddenPre.innerText;
 455   }
 456   return spaceBefore + content + spaceAfter;
 457 }
 458
 459 /**
 460  * Escapes all potentially dangerous characters, so that the
 461  * resulting string can be safely inserted into attribute or
 462  * element text.
 463  * @param value
 464  * @returns {string} escaped text
 465  */
 466 function encodeEntities(value) {
 467   return value.
 468     replace(/&/g, '&amp;').
 469     replace(SURROGATE_PAIR_REGEXP, function(value) {
 470       var hi = value.charCodeAt(0);
 471       var low = value.charCodeAt(1);
 472       return '&#' + (((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000) + ';';
 473     }).
 474     replace(NON_ALPHANUMERIC_REGEXP, function(value) {
 475       // unsafe chars are: \u0000-\u001f \u007f-\u009f \u00ad \u0600-\u0604 \u070f \u17b4 \u17b5 \u200c-\u200f \u2028-\u202f \u2060-\u206f \ufeff \ufff0-\uffff from jslint.com/lint.html
 476       // decimal values are: 0-31, 127-159, 173, 1536-1540, 1807, 6068, 6069, 8204-8207, 8232-8239, 8288-8303, 65279, 65520-65535
 477       var c = value.charCodeAt(0);
 478       // if unsafe character encode
 479       if(c <= 159 ||
 480         c == 173 ||
 481         (c >= 1536 && c <= 1540) ||
 482         c == 1807 ||
 483         c == 6068 ||
 484         c == 6069 ||
 485         (c >= 8204 && c <= 8207) ||
 486         (c >= 8232 && c <= 8239) ||
 487         (c >= 8288 && c <= 8303) ||
 488         c == 65279 ||
 489         (c >= 65520 && c <= 65535)) return '&#' + c + ';';
 490       return value; // avoids multilingual issues
 491     }).
 492     replace(/</g, '&lt;').
 493     replace(/>/g, '&gt;');
 494 }
 495
 496 var trim = (function() {
 497   // native trim is way faster: http://jsperf.com/angular-trim-test
 498   // but IE doesn't have it... :-(
 499   // TODO: we should move this into IE/ES5 polyfill
 500   if (!String.prototype.trim) {
 501     return function(value) {
 502       return angular.isString(value) ? value.replace(/^\s\s*/, '').replace(/\s\s*$/, '') : value;
 503     };
 504   }
 505   return function(value) {
 506     return angular.isString(value) ? value.trim() : value;
 507   };
 508 })();
 509
 510 // Custom logic for accepting certain style options only - textAngular
 511 // Currently allows only the color, background-color, text-align, float, width and height attributes
 512 // all other attributes should be easily done through classes.
 513 function validStyles(styleAttr){
 514         var result = '';
 515         var styleArray = styleAttr.split(';');
 516         angular.forEach(styleArray, function(value){
 517                 var v = value.split(':');
 518                 if(v.length == 2){
 519                         var key = trim(angular.lowercase(v[0]));
 520                         var value = trim(angular.lowercase(v[1]));
 521                         if(
 522                                 (key === 'color' || key === 'background-color') && (
 523                                         value.match(/^rgb\([0-9%,\. ]*\)$/i)
 524                                         || value.match(/^rgba\([0-9%,\. ]*\)$/i)
 525                                         || value.match(/^hsl\([0-9%,\. ]*\)$/i)
 526                                         || value.match(/^hsla\([0-9%,\. ]*\)$/i)
 527                                         || value.match(/^#[0-9a-f]{3,6}$/i)
 528                                         || value.match(/^[a-z]*$/i)
 529                                 )
 530                         ||
 531                                 key === 'text-align' && (
 532                                         value === 'left'
 533                                         || value === 'right'
 534                                         || value === 'center'
 535                                         || value === 'justify'
 536                                 )
 537                         ||
 538                 key === 'text-decoration' && (
 539                     value === 'underline'
 540                     || value === 'line-through'
 541                 )
 542             || key === 'font-weight' && (
 543                     value === 'bold'
 544                 )
 545             ||
 546                                 key === 'float' && (
 547                                         value === 'left'
 548                                         || value === 'right'
 549                                         || value === 'none'
 550                                 )
 551                         ||
 552                                 (key === 'width' || key === 'height') && (
 553                                         value.match(/[0-9\.]*(px|em|rem|%)/)
 554                                 )
 555                         || // Reference #520
 556                                 (key === 'direction' && value.match(/^ltr|rtl|initial|inherit$/))
 557                         ) result += key + ': ' + value + ';';
 558                 }
 559         });
 560         return result;
 561 }
 562
 563 // this function is used to manually allow specific attributes on specific tags with certain prerequisites
 564 function validCustomTag(tag, attrs, lkey, value){
 565         // catch the div placeholder for the iframe replacement
 566     if (tag === 'img' && attrs['ta-insert-video']){
 567         if(lkey === 'ta-insert-video' || lkey === 'allowfullscreen' || lkey === 'frameborder' || (lkey === 'contenteditable' && value === 'false')) return true;
 568     }
 569     return false;
 570 }
 571
 572 /**
 573  * create an HTML/XML writer which writes to buffer
 574  * @param {Array} buf use buf.jain('') to get out sanitized html string
 575  * @returns {object} in the form of {
 576  *     start: function(tag, attrs, unary) {},
 577  *     end: function(tag) {},
 578  *     chars: function(text) {},
 579  *     comment: function(text) {}
 580  * }
 581  */
 582 function htmlSanitizeWriter(buf, uriValidator) {
 583   var ignore = false;
 584   var out = angular.bind(buf, buf.push);
 585   return {
 586     start: function(tag, attrs, unary) {
 587       tag = angular.lowercase(tag);
 588       if (!ignore && specialElements[tag]) {
 589         ignore = tag;
 590       }
 591       if (!ignore && validElements[tag] === true) {
 592         out('<');
 593         out(tag);
 594         angular.forEach(attrs, function(value, key) {
 595           var lkey=angular.lowercase(key);
 596           var isImage=(tag === 'img' && lkey === 'src') || (lkey === 'background');
 597           if ((lkey === 'style' && (value = validStyles(value)) !== '') || validCustomTag(tag, attrs, lkey, value) || validAttrs[lkey] === true &&
 598             (uriAttrs[lkey] !== true || uriValidator(value, isImage))) {
 599             out(' ');
 600             out(key);
 601             out('="');
 602             out(encodeEntities(value));
 603             out('"');
 604           }
 605         });
 606         out(unary ? '/>' : '>');
 607       }
 608     },
 609     comment: function (com) {
 610       out(com);
 611     },
 612     whitespace: function (ws) {
 613       out(encodeEntities(ws));
 614     },
 615     end: function(tag) {
 616         tag = angular.lowercase(tag);
 617         if (!ignore && validElements[tag] === true) {
 618           out('</');
 619           out(tag);
 620           out('>');
 621         }
 622         if (tag == ignore) {
 623           ignore = false;
 624         }
 625       },
 626     chars: function(chars) {
 627         if (!ignore) {
 628           out(encodeEntities(chars));
 629         }
 630       }
 631   };
 632 }
 633
 634
 635 // define ngSanitize module and register $sanitize service
 636 angular.module('ngSanitize', []).provider('$sanitize', $SanitizeProvider);
 637
 638 /* global sanitizeText: false */
 639
 640 /**
 641  * @ngdoc filter
 642  * @name linky
 643  * @kind function
 644  *
 645  * @description
 646  * Finds links in text input and turns them into html links. Supports http/https/ftp/mailto and
 647  * plain email address links.
 648  *
 649  * Requires the {@link ngSanitize `ngSanitize`} module to be installed.
 650  *
 651  * @param {string} text Input text.
 652  * @param {string} target Window (_blank|_self|_parent|_top) or named frame to open links in.
 653  * @returns {string} Html-linkified text.
 654  *
 655  * @usage
 656    <span ng-bind-html="linky_expression | linky"></span>
 657  *
 658  * @example
 659    <example module="linkyExample" deps="angular-sanitize.js">
 660      <file name="index.html">
 661        <script>
 662          angular.module('linkyExample', ['ngSanitize'])
 663            .controller('ExampleController', ['$scope', function($scope) {
 664              $scope.snippet =
 665                'Pretty text with some links:\n'+
 666                'http://angularjs.org/,\n'+
 667                'mailto:us@somewhere.org,\n'+
 668                'another@somewhere.org,\n'+
 669                'and one more: ftp://127.0.0.1/.';
 670              $scope.snippetWithTarget = 'http://angularjs.org/';
 671            }]);
 672        </script>
 673        <div ng-controller="ExampleController">
 674        Snippet: <textarea ng-model="snippet" cols="60" rows="3"></textarea>
 675        <table>
 676          <tr>
 677            <td>Filter</td>
 678            <td>Source</td>
 679            <td>Rendered</td>
 680          </tr>
 681          <tr id="linky-filter">
 682            <td>linky filter</td>
 683            <td>
 684              <pre>&lt;div ng-bind-html="snippet | linky"&gt;<br>&lt;/div&gt;</pre>
 685            </td>
 686            <td>
 687              <div ng-bind-html="snippet | linky"></div>
 688            </td>
 689          </tr>
 690          <tr id="linky-target">
 691           <td>linky target</td>
 692           <td>
 693             <pre>&lt;div ng-bind-html="snippetWithTarget | linky:'_blank'"&gt;<br>&lt;/div&gt;</pre>
 694           </td>
 695           <td>
 696             <div ng-bind-html="snippetWithTarget | linky:'_blank'"></div>
 697           </td>
 698          </tr>
 699          <tr id="escaped-html">
 700            <td>no filter</td>
 701            <td><pre>&lt;div ng-bind="snippet"&gt;<br>&lt;/div&gt;</pre></td>
 702            <td><div ng-bind="snippet"></div></td>
 703          </tr>
 704        </table>
 705      </file>
 706      <file name="protractor.js" type="protractor">
 707        it('should linkify the snippet with urls', function() {
 708          expect(element(by.id('linky-filter')).element(by.binding('snippet | linky')).getText()).
 709              toBe('Pretty text with some links: http://angularjs.org/, us@somewhere.org, ' +
 710                   'another@somewhere.org, and one more: ftp://127.0.0.1/.');
 711          expect(element.all(by.css('#linky-filter a')).count()).toEqual(4);
 712        });
 713
 714        it('should not linkify snippet without the linky filter', function() {
 715          expect(element(by.id('escaped-html')).element(by.binding('snippet')).getText()).
 716              toBe('Pretty text with some links: http://angularjs.org/, mailto:us@somewhere.org, ' +
 717                   'another@somewhere.org, and one more: ftp://127.0.0.1/.');
 718          expect(element.all(by.css('#escaped-html a')).count()).toEqual(0);
 719        });
 720
 721        it('should update', function() {
 722          element(by.model('snippet')).clear();
 723          element(by.model('snippet')).sendKeys('new http://link.');
 724          expect(element(by.id('linky-filter')).element(by.binding('snippet | linky')).getText()).
 725              toBe('new http://link.');
 726          expect(element.all(by.css('#linky-filter a')).count()).toEqual(1);
 727          expect(element(by.id('escaped-html')).element(by.binding('snippet')).getText())
 728              .toBe('new http://link.');
 729        });
 730
 731        it('should work with the target property', function() {
 732         expect(element(by.id('linky-target')).
 733             element(by.binding("snippetWithTarget | linky:'_blank'")).getText()).
 734             toBe('http://angularjs.org/');
 735         expect(element(by.css('#linky-target a')).getAttribute('target')).toEqual('_blank');
 736        });
 737      </file>
 738    </example>
 739  */
 740 angular.module('ngSanitize').filter('linky', ['$sanitize', function($sanitize) {
 741   var LINKY_URL_REGEXP =
 742         /((ftp|https?):\/\/|(www\.)|(mailto:)?[A-Za-z0-9._%+-]+@)\S*[^\s.;,(){}<>"”’]/,
 743       MAILTO_REGEXP = /^mailto:/;
 744
 745   return function(text, target) {
 746     if (!text) return text;
 747     var match;
 748     var raw = text;
 749     var html = [];
 750     var url;
 751     var i;
 752     while ((match = raw.match(LINKY_URL_REGEXP))) {
 753       // We can not end in these as they are sometimes found at the end of the sentence
 754       url = match[0];
 755       // if we did not match ftp/http/www/mailto then assume mailto
 756       if (!match[2] && !match[4]) {
 757         url = (match[3] ? 'http://' : 'mailto:') + url;
 758       }
 759       i = match.index;
 760       addText(raw.substr(0, i));
 761       addLink(url, match[0].replace(MAILTO_REGEXP, ''));
 762       raw = raw.substring(i + match[0].length);
 763     }
 764     addText(raw);
 765     return $sanitize(html.join(''));
 766
 767     function addText(text) {
 768       if (!text) {
 769         return;
 770       }
 771       html.push(sanitizeText(text));
 772     }
 773
 774     function addLink(url, text) {
 775       html.push('<a ');
 776       if (angular.isDefined(target)) {
 777         html.push('target="',
 778                   target,
 779                   '" ');
 780       }
 781       html.push('href="',
 782                 url.replace(/"/g, '&quot;'),
 783                 '">');
 784       addText(text);
 785       html.push('</a>');
 786     }
 787   };
 788 }]);
 789
 790
 791 })(window, window.angular);