// ------------------------------------------------------------------------------------------------------------------- // This file is was created from the google-caja project, and the standalone sanitizer // cd ~/src/cartodb // https://code.google.com/p/google-caja/wiki/JsHtmlSanitizer // // Steps to rebuild this file: // $ git clone https://github.com/google/caja.git google-caja // $ cd google-caja // $ ant // $ cp ant-lib/com/google/caja/plugin/html-css-sanitizer-bundle.js /path/to/cartodb.js/vendor/ // // Additional changes after the built file above: // - Added: This header // - Modified: `iframe` element. Mark it as unsafe changing code from 4 to 16. (line: 3543) // - Modified: `sanitizeAttribs` at end, to allow "data-*"" attributes (lines ~4755-4761) // - changed policy for a::target attribute to be allowed (html4.ATTRIBS: { 'a::target': ... changed value from 10 to 0) (line 3211) // ------------------------------------------------------------------------------------------------------------------- /* Copyright Google Inc. * Licensed under the Apache Licence Version 2.0 * Autogenerated at Wed Nov 25 17:35:12 CET 2015 * \@overrides window * \@provides cssSchema, CSS_PROP_BIT_QUANTITY, CSS_PROP_BIT_HASH_VALUE, CSS_PROP_BIT_NEGATIVE_QUANTITY, CSS_PROP_BIT_QSTRING, CSS_PROP_BIT_URL, CSS_PROP_BIT_UNRESERVED_WORD, CSS_PROP_BIT_UNICODE_RANGE, CSS_PROP_BIT_GLOBAL_NAME, CSS_PROP_BIT_PROPERTY_NAME */ /** * @const * @type {number} */ var CSS_PROP_BIT_QUANTITY = 1; /** * @const * @type {number} */ var CSS_PROP_BIT_HASH_VALUE = 2; /** * @const * @type {number} */ var CSS_PROP_BIT_NEGATIVE_QUANTITY = 4; /** * @const * @type {number} */ var CSS_PROP_BIT_QSTRING = 8; /** * @const * @type {number} */ var CSS_PROP_BIT_URL = 16; /** * @const * @type {number} */ var CSS_PROP_BIT_UNRESERVED_WORD = 64; /** * @const * @type {number} */ var CSS_PROP_BIT_UNICODE_RANGE = 128; /** * @const * @type {number} */ var CSS_PROP_BIT_GLOBAL_NAME = 512; /** * @const * @type {number} */ var CSS_PROP_BIT_PROPERTY_NAME = 1024; var cssSchema = (function () { var L = [ [ 'aliceblue', 'antiquewhite', 'aqua', 'aquamarine', 'azure', 'beige', 'bisque', 'black', 'blanchedalmond', 'blue', 'blueviolet', 'brown', 'burlywood', 'cadetblue', 'chartreuse', 'chocolate', 'coral', 'cornflowerblue', 'cornsilk', 'crimson', 'cyan', 'darkblue', 'darkcyan', 'darkgoldenrod', 'darkgray', 'darkgreen', 'darkkhaki', 'darkmagenta', 'darkolivegreen', 'darkorange', 'darkorchid', 'darkred', 'darksalmon', 'darkseagreen', 'darkslateblue', 'darkslategray', 'darkturquoise', 'darkviolet', 'deeppink', 'deepskyblue', 'dimgray', 'dodgerblue', 'firebrick', 'floralwhite', 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], L[ 11 ], L[ 31 ], L[ 42 ], L[ 48 ], L[ 56 ], L[ 57 ] ], 'cssFns': [ 'rgb()', 'rgba()' ] }, 'repeating-linear-gradient()': 'linear-gradient()', 'repeating-radial-gradient()': 'radial-gradient()', 'rgb()': { 'cssPropBits': 1, 'cssLitGroup': [ L[ 48 ] ], 'cssFns': [ ] }, 'rgba()': 'rgb()', 'rect()': { 'cssPropBits': 5, 'cssLitGroup': [ L[ 48 ], L[ 52 ] ], 'cssFns': [ ] }, 'alpha()': { 'cssPropBits': 1, 'cssLitGroup': [ L[ 28 ] ], 'cssFns': [ ] }, 'matrix()': 'animation-delay', 'perspective()': 'border-bottom-left-radius', 'rotate()': 'border-bottom-left-radius', 'rotate3d()': 'animation-delay', 'rotatex()': 'border-bottom-left-radius', 'rotatey()': 'border-bottom-left-radius', 'rotatez()': 'border-bottom-left-radius', 'scale()': 'animation-delay', 'scale3d()': 'animation-delay', 'scalex()': 'border-bottom-left-radius', 'scaley()': 'border-bottom-left-radius', 'scalez()': 'border-bottom-left-radius', 'skew()': 'animation-delay', 'skewx()': 'border-bottom-left-radius', 'skewy()': 'border-bottom-left-radius', 'translate()': 'animation-delay', 'translate3d()': 'animation-delay', 'translatex()': 'border-bottom-left-radius', 'translatey()': 'border-bottom-left-radius', 'translatez()': 'border-bottom-left-radius' }; if (true) { for (var key in schema) { if ('string' === typeof schema[ key ] && Object.hasOwnProperty.call(schema, key)) { schema[ key ] = schema[ schema[ key ] ]; } } } return schema; })(); if (typeof window !== 'undefined') { window['cssSchema'] = cssSchema; } ; // Copyright (C) 2011 Google Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. /** * A lexical scannar for CSS3 as defined at http://www.w3.org/TR/css3-syntax . * * @author Mike Samuel * \@provides lexCss, decodeCss * \@overrides window */ var lexCss; var decodeCss; (function () { /** * Decodes an escape sequence as specified in CSS3 section 4.1. * http://www.w3.org/TR/css3-syntax/#characters * @private */ function decodeCssEscape(s) { var i = parseInt(s.substring(1), 16); // If parseInt didn't find a hex diigt, it returns NaN so return the // escaped character. // Otherwise, parseInt will stop at the first non-hex digit so there's no // need to worry about trailing whitespace. if (i > 0xffff) { // A supplemental codepoint. return i -= 0x10000, String.fromCharCode( 0xd800 + (i >> 10), 0xdc00 + (i & 0x3FF)); } else if (i == i) { return String.fromCharCode(i); } else if (s[1] < ' ') { // "a backslash followed by a newline is ignored". return ''; } else { return s[1]; } } /** * Returns an equivalent CSS string literal given plain text: foo -> "foo". * @private */ function escapeCssString(s, replacer) { return '"' + s.replace(/[\u0000-\u001f\\\"<>]/g, replacer) + '"'; } /** * Maps chars to CSS escaped equivalents: "\n" -> "\\a ". * @private */ function escapeCssStrChar(ch) { return cssStrChars[ch] || (cssStrChars[ch] = '\\' + ch.charCodeAt(0).toString(16) + ' '); } /** * Maps chars to URI escaped equivalents: "\n" -> "%0a". * @private */ function escapeCssUrlChar(ch) { return cssUrlChars[ch] || (cssUrlChars[ch] = (ch < '\x10' ? '%0' : '%') + ch.charCodeAt(0).toString(16)); } /** * Mapping of CSS special characters to escaped equivalents. * @private */ var cssStrChars = { '\\': '\\\\' }; /** * Mapping of CSS special characters to URL-escaped equivalents. * @private */ var cssUrlChars = { '\\': '%5c' }; // The comments below are copied from the CSS3 module syntax at // http://www.w3.org/TR/css3-syntax . // These string constants minify out when this is run-through closure // compiler. // Rules that have been adapted have comments prefixed with "Diff:", and // where rules have been combined to avoid back-tracking in the regex engine // or to work around limitations, there is a comment prefixed with // "NewRule:". // In the below, we assume CRLF and CR have been normalize to CR. // wc ::= #x9 | #xA | #xC | #xD | #x20 var WC = '[\\t\\n\\f ]'; // w ::= wc* var W = WC + '*'; // nl ::= #xA | #xD #xA | #xD | #xC var NL = '[\\n\\f]'; // nonascii ::= [#x80-#xD7FF#xE000-#xFFFD#x10000-#x10FFFF] // NewRule: Supplemental codepoints are represented as surrogate pairs in JS. var SURROGATE_PAIR = '[\\ud800-\\udbff][\\udc00-\\udfff]'; var NONASCII = '[\\u0080-\\ud7ff\\ue000-\\ufffd]|' + SURROGATE_PAIR; // unicode ::= '\' [0-9a-fA-F]{1,6} wc? // NewRule: No point in having ESCAPE do (\\x|\\y) var UNICODE_TAIL = '[0-9a-fA-F]{1,6}' + WC + '?'; var UNICODE = '\\\\' + UNICODE_TAIL; // escape ::= unicode // | '\' [#x20-#x7E#x80-#xD7FF#xE000-#xFFFD#x10000-#x10FFFF] // NewRule: Below we use escape tail to efficiently match an escape or a // line continuation so we can decode string content. var ESCAPE_TAIL = '(?:' + UNICODE_TAIL + '|[\\u0020-\\u007e\\u0080-\\ud7ff\\ue000\\ufffd]|' + SURROGATE_PAIR + ')'; var ESCAPE = '\\\\' + ESCAPE_TAIL; // urlchar ::= [#x9#x21#x23-#x26#x28-#x7E] | nonascii | escape var URLCHAR = '(?:[\\t\\x21\\x23-\\x26\\x28-\\x5b\\x5d-\\x7e]|' + NONASCII + '|' + ESCAPE + ')'; // stringchar ::= urlchar | #x20 | '\' nl // We ignore mismatched surrogate pairs inside strings, so stringchar // simplifies to a non-(quote|newline|backslash) or backslash any. // Since we normalize CRLF to a single code-unit, there is no special // handling needed for '\\' + CRLF. var STRINGCHAR = '[^\'"\\n\\f\\\\]|\\\\[\\s\\S]'; // string ::= '"' (stringchar | "'")* '"' | "'" (stringchar | '"')* "'" var STRING = '"(?:\'|' + STRINGCHAR + ')*"' + '|\'(?:\"|' + STRINGCHAR + ')*\''; // num ::= [0-9]+ | [0-9]* '.' [0-9]+ // Diff: We attach signs to num tokens. var NUM = '[-+]?(?:[0-9]+(?:[.][0-9]+)?|[.][0-9]+)'; // nmstart ::= [a-zA-Z] | '_' | nonascii | escape var NMSTART = '(?:[a-zA-Z_]|' + NONASCII + '|' + ESCAPE + ')'; // nmchar ::= [a-zA-Z0-9] | '-' | '_' | nonascii | escape var NMCHAR = '(?:[a-zA-Z0-9_-]|' + NONASCII + '|' + ESCAPE + ')'; // name ::= nmchar+ var NAME = NMCHAR + '+'; // ident ::= '-'? nmstart nmchar* var IDENT = '-?' + NMSTART + NMCHAR + '*'; // ATKEYWORD ::= '@' ident var ATKEYWORD = '@' + IDENT; // HASH ::= '#' name var HASH = '#' + NAME; // NUMBER ::= num var NUMBER = NUM; // NewRule: union of IDENT, ATKEYWORD, HASH, but excluding #[0-9]. var WORD_TERM = '(?:@?-?' + NMSTART + '|#)' + NMCHAR + '*'; // PERCENTAGE ::= num '%' var PERCENTAGE = NUM + '%'; // DIMENSION ::= num ident var DIMENSION = NUM + IDENT; var NUMERIC_VALUE = NUM + '(?:%|' + IDENT + ')?'; // URI ::= "url(" w (string | urlchar* ) w ")" var URI = 'url[(]' + W + '(?:' + STRING + '|' + URLCHAR + '*)' + W + '[)]'; // UNICODE-RANGE ::= "U+" [0-9A-F?]{1,6} ('-' [0-9A-F]{1,6})? var UNICODE_RANGE = 'U[+][0-9A-F?]{1,6}(?:-[0-9A-F]{1,6})?'; // CDO ::= "<\!--" var CDO = '<\!--'; // CDC ::= "-->" var CDC = '-->'; // S ::= wc+ var S = WC + '+'; // COMMENT ::= "/*" [^*]* '*'+ ([^/] [^*]* '*'+)* "/" // Diff: recognizes // comments. var COMMENT = '/(?:[*][^*]*[*]+(?:[^/][^*]*[*]+)*/|/[^\\n\\f]*)'; // FUNCTION ::= ident '(' // Diff: We exclude url explicitly. // TODO: should we be tolerant of "fn ("? var FUNCTION = '(?!url[(])' + IDENT + '[(]'; // INCLUDES ::= "~=" var INCLUDES = '~='; // DASHMATCH ::= "|=" var DASHMATCH = '[|]='; // PREFIXMATCH ::= "^=" var PREFIXMATCH = '[^]='; // SUFFIXMATCH ::= "$=" var SUFFIXMATCH = '[$]='; // SUBSTRINGMATCH ::= "*=" var SUBSTRINGMATCH = '[*]='; // NewRule: one rule for all the comparison operators. var CMP_OPS = '[~|^$*]='; // CHAR ::= any character not matched by the above rules, except for " or ' // Diff: We exclude / and \ since they are handled above to prevent // /* without a following */ from combining when comments are concatenated. var CHAR = '[^"\'\\\\/]|/(?![/*])'; // BOM ::= #xFEFF var BOM = '\\uFEFF'; var CSS_TOKEN = new RegExp([ BOM, UNICODE_RANGE, URI, FUNCTION, WORD_TERM, STRING, NUMERIC_VALUE, CDO, CDC, S, COMMENT, CMP_OPS, CHAR].join("|"), 'gi'); var CSS_DECODER = new RegExp('\\\\(?:' + ESCAPE_TAIL + '|' + NL + ')', 'g'); var URL_RE = new RegExp('^url\\(' + W + '["\']?|["\']?' + W + '\\)$', 'gi'); /** * Decodes CSS escape sequences in a CSS string body. */ decodeCss = function (css) { return css.replace(CSS_DECODER, decodeCssEscape); }; /** * Given CSS Text, returns an array of normalized tokens. * @param {string} cssText * @return {Array.} tokens where all ignorable token sequences have * been reduced to a single {@code " "} and all strings and * {@code url(...)} tokens have been normalized to use double quotes as * delimiters and to not otherwise contain double quotes. */ lexCss = function (cssText) { // Stringify input. Additionally, insert and remove a non-latin1 character // to force Firefox 33 to switch to a wide string representation, avoiding // a performance bug. This workaround should become unnecessary after // Firefox 34. https://bugzilla.mozilla.org/show_bug.cgi?id=1081175 // https://code.google.com/p/google-caja/issues/detail?id=1941 cssText = ('\uffff' + cssText).replace(/^\uffff/, ''); // // Normalize CRLF & CR to LF. cssText = cssText.replace(/\r\n?/g, '\n'); // Tokenize. var tokens = cssText.match(CSS_TOKEN) || []; var j = 0; var last = ' '; for (var i = 0, n = tokens.length; i < n; ++i) { // Normalize all escape sequences. We will have to re-escape some // codepoints in string and url(...) bodies but we already know the // boundaries. // We might mistakenly treat a malformed identifier like \22\20\22 as a // string, but that will not break any valid stylesheets since we requote // and re-escape in string below. var tok = decodeCss(tokens[i]); var len = tok.length; var cc = tok.charCodeAt(0); tok = // All strings should be double quoted, and the body should never // contain a double quote. (cc == '"'.charCodeAt(0) || cc == '\''.charCodeAt(0)) ? escapeCssString(tok.substring(1, len - 1), escapeCssStrChar) // A breaking ignorable token should is replaced with a single space. : (cc == '/'.charCodeAt(0) && len > 1 // Comment. || tok == '\\' || tok == CDC || tok == CDO || tok == '\ufeff' // Characters in W. || cc <= ' '.charCodeAt(0)) ? ' ' // Make sure that all url(...)s are double quoted. : /url\(/i.test(tok) ? 'url(' + escapeCssString( tok.replace(URL_RE, ''), escapeCssUrlChar) + ')' // Escapes in identifier like tokens will have been normalized above. : tok; // Merge adjacent space tokens. if (last != tok || tok != ' ') { tokens[j++] = last = tok; } } tokens.length = j; return tokens; }; })(); // Exports for closure compiler. if (typeof window !== 'undefined') { window['lexCss'] = lexCss; window['decodeCss'] = decodeCss; } ; // Copyright (C) 2010 Google Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. /** * @fileoverview * Implements RFC 3986 for parsing/formatting URIs. * * @author mikesamuel@gmail.com * \@provides URI * \@overrides window */ var URI = (function () { /** * creates a uri from the string form. The parser is relaxed, so special * characters that aren't escaped but don't cause ambiguities will not cause * parse failures. * * @return {URI|null} */ function parse(uriStr) { var m = ('' + uriStr).match(URI_RE_); if (!m) { return null; } return new URI( nullIfAbsent(m[1]), nullIfAbsent(m[2]), nullIfAbsent(m[3]), nullIfAbsent(m[4]), nullIfAbsent(m[5]), nullIfAbsent(m[6]), nullIfAbsent(m[7])); } /** * creates a uri from the given parts. * * @param scheme {string} an unencoded scheme such as "http" or null * @param credentials {string} unencoded user credentials or null * @param domain {string} an unencoded domain name or null * @param port {number} a port number in [1, 32768]. * -1 indicates no port, as does null. * @param path {string} an unencoded path * @param query {Array.|string|null} a list of unencoded cgi * parameters where even values are keys and odds the corresponding values * or an unencoded query. * @param fragment {string} an unencoded fragment without the "#" or null. * @return {URI} */ function create(scheme, credentials, domain, port, path, query, fragment) { var uri = new URI( encodeIfExists2(scheme, URI_DISALLOWED_IN_SCHEME_OR_CREDENTIALS_), encodeIfExists2( credentials, URI_DISALLOWED_IN_SCHEME_OR_CREDENTIALS_), encodeIfExists(domain), port > 0 ? port.toString() : null, encodeIfExists2(path, URI_DISALLOWED_IN_PATH_), null, encodeIfExists(fragment)); if (query) { if ('string' === typeof query) { uri.setRawQuery(query.replace(/[^?&=0-9A-Za-z_\-~.%]/g, encodeOne)); } else { uri.setAllParameters(query); } } return uri; } function encodeIfExists(unescapedPart) { if ('string' == typeof unescapedPart) { return encodeURIComponent(unescapedPart); } return null; }; /** * if unescapedPart is non null, then escapes any characters in it that aren't * valid characters in a url and also escapes any special characters that * appear in extra. * * @param unescapedPart {string} * @param extra {RegExp} a character set of characters in [\01-\177]. * @return {string|null} null iff unescapedPart == null. */ function encodeIfExists2(unescapedPart, extra) { if ('string' == typeof unescapedPart) { return encodeURI(unescapedPart).replace(extra, encodeOne); } return null; }; /** converts a character in [\01-\177] to its url encoded equivalent. */ function encodeOne(ch) { var n = ch.charCodeAt(0); return '%' + '0123456789ABCDEF'.charAt((n >> 4) & 0xf) + '0123456789ABCDEF'.charAt(n & 0xf); } /** * {@updoc * $ normPath('foo/./bar') * # 'foo/bar' * $ normPath('./foo') * # 'foo' * $ normPath('foo/.') * # 'foo' * $ normPath('foo//bar') * # 'foo/bar' * } */ function normPath(path) { return path.replace(/(^|\/)\.(?:\/|$)/g, '$1').replace(/\/{2,}/g, '/'); } var PARENT_DIRECTORY_HANDLER = new RegExp( '' // A path break + '(/|^)' // followed by a non .. path element // (cannot be . because normPath is used prior to this RegExp) + '(?:[^./][^/]*|\\.{2,}(?:[^./][^/]*)|\\.{3,}[^/]*)' // followed by .. followed by a path break. + '/\\.\\.(?:/|$)'); var PARENT_DIRECTORY_HANDLER_RE = new RegExp(PARENT_DIRECTORY_HANDLER); var EXTRA_PARENT_PATHS_RE = /^(?:\.\.\/)*(?:\.\.$)?/; /** * Normalizes its input path and collapses all . and .. sequences except for * .. sequences that would take it above the root of the current parent * directory. * {@updoc * $ collapse_dots('foo/../bar') * # 'bar' * $ collapse_dots('foo/./bar') * # 'foo/bar' * $ collapse_dots('foo/../bar/./../../baz') * # 'baz' * $ collapse_dots('../foo') * # '../foo' * $ collapse_dots('../foo').replace(EXTRA_PARENT_PATHS_RE, '') * # 'foo' * } */ function collapse_dots(path) { if (path === null) { return null; } var p = normPath(path); // Only /../ left to flatten var r = PARENT_DIRECTORY_HANDLER_RE; // We replace with $1 which matches a / before the .. because this // guarantees that: // (1) we have at most 1 / between the adjacent place, // (2) always have a slash if there is a preceding path section, and // (3) we never turn a relative path into an absolute path. for (var q; (q = p.replace(r, '$1')) != p; p = q) {}; return p; } /** * resolves a relative url string to a base uri. * @return {URI} */ function resolve(baseUri, relativeUri) { // there are several kinds of relative urls: // 1. //foo - replaces everything from the domain on. foo is a domain name // 2. foo - replaces the last part of the path, the whole query and fragment // 3. /foo - replaces the the path, the query and fragment // 4. ?foo - replace the query and fragment // 5. #foo - replace the fragment only var absoluteUri = baseUri.clone(); // we satisfy these conditions by looking for the first part of relativeUri // that is not blank and applying defaults to the rest var overridden = relativeUri.hasScheme(); if (overridden) { absoluteUri.setRawScheme(relativeUri.getRawScheme()); } else { overridden = relativeUri.hasCredentials(); } if (overridden) { absoluteUri.setRawCredentials(relativeUri.getRawCredentials()); } else { overridden = relativeUri.hasDomain(); } if (overridden) { absoluteUri.setRawDomain(relativeUri.getRawDomain()); } else { overridden = relativeUri.hasPort(); } var rawPath = relativeUri.getRawPath(); var simplifiedPath = collapse_dots(rawPath); if (overridden) { absoluteUri.setPort(relativeUri.getPort()); simplifiedPath = simplifiedPath && simplifiedPath.replace(EXTRA_PARENT_PATHS_RE, ''); } else { overridden = !!rawPath; if (overridden) { // resolve path properly if (simplifiedPath.charCodeAt(0) !== 0x2f /* / */) { // path is relative var absRawPath = collapse_dots(absoluteUri.getRawPath() || '') .replace(EXTRA_PARENT_PATHS_RE, ''); var slash = absRawPath.lastIndexOf('/') + 1; simplifiedPath = collapse_dots( (slash ? absRawPath.substring(0, slash) : '') + collapse_dots(rawPath)) .replace(EXTRA_PARENT_PATHS_RE, ''); } } else { simplifiedPath = simplifiedPath && simplifiedPath.replace(EXTRA_PARENT_PATHS_RE, ''); if (simplifiedPath !== rawPath) { absoluteUri.setRawPath(simplifiedPath); } } } if (overridden) { absoluteUri.setRawPath(simplifiedPath); } else { overridden = relativeUri.hasQuery(); } if (overridden) { absoluteUri.setRawQuery(relativeUri.getRawQuery()); } else { overridden = relativeUri.hasFragment(); } if (overridden) { absoluteUri.setRawFragment(relativeUri.getRawFragment()); } return absoluteUri; } /** * a mutable URI. * * This class contains setters and getters for the parts of the URI. * The getXYZ/setXYZ methods return the decoded part -- so * uri.parse('/foo%20bar').getPath() will return the decoded path, * /foo bar. * *

The raw versions of fields are available too. * uri.parse('/foo%20bar').getRawPath() will return the raw path, * /foo%20bar. Use the raw setters with care, since * URI::toString is not guaranteed to return a valid url if a * raw setter was used. * *

All setters return this and so may be chained, a la * uri.parse('/foo').setFragment('part').toString(). * *

You should not use this constructor directly -- please prefer the factory * functions {@link uri.parse}, {@link uri.create}, {@link uri.resolve} * instead.

* *

The parameters are all raw (assumed to be properly escaped) parts, and * any (but not all) may be null. Undefined is not allowed.

* * @constructor */ function URI( rawScheme, rawCredentials, rawDomain, port, rawPath, rawQuery, rawFragment) { this.scheme_ = rawScheme; this.credentials_ = rawCredentials; this.domain_ = rawDomain; this.port_ = port; this.path_ = rawPath; this.query_ = rawQuery; this.fragment_ = rawFragment; /** * @type {Array|null} */ this.paramCache_ = null; } /** returns the string form of the url. */ URI.prototype.toString = function () { var out = []; if (null !== this.scheme_) { out.push(this.scheme_, ':'); } if (null !== this.domain_) { out.push('//'); if (null !== this.credentials_) { out.push(this.credentials_, '@'); } out.push(this.domain_); if (null !== this.port_) { out.push(':', this.port_.toString()); } } if (null !== this.path_) { out.push(this.path_); } if (null !== this.query_) { out.push('?', this.query_); } if (null !== this.fragment_) { out.push('#', this.fragment_); } return out.join(''); }; URI.prototype.clone = function () { return new URI(this.scheme_, this.credentials_, this.domain_, this.port_, this.path_, this.query_, this.fragment_); }; URI.prototype.getScheme = function () { // HTML5 spec does not require the scheme to be lowercased but // all common browsers except Safari lowercase the scheme. return this.scheme_ && decodeURIComponent(this.scheme_).toLowerCase(); }; URI.prototype.getRawScheme = function () { return this.scheme_; }; URI.prototype.setScheme = function (newScheme) { this.scheme_ = encodeIfExists2( newScheme, URI_DISALLOWED_IN_SCHEME_OR_CREDENTIALS_); return this; }; URI.prototype.setRawScheme = function (newScheme) { this.scheme_ = newScheme ? newScheme : null; return this; }; URI.prototype.hasScheme = function () { return null !== this.scheme_; }; URI.prototype.getCredentials = function () { return this.credentials_ && decodeURIComponent(this.credentials_); }; URI.prototype.getRawCredentials = function () { return this.credentials_; }; URI.prototype.setCredentials = function (newCredentials) { this.credentials_ = encodeIfExists2( newCredentials, URI_DISALLOWED_IN_SCHEME_OR_CREDENTIALS_); return this; }; URI.prototype.setRawCredentials = function (newCredentials) { this.credentials_ = newCredentials ? newCredentials : null; return this; }; URI.prototype.hasCredentials = function () { return null !== this.credentials_; }; URI.prototype.getDomain = function () { return this.domain_ && decodeURIComponent(this.domain_); }; URI.prototype.getRawDomain = function () { return this.domain_; }; URI.prototype.setDomain = function (newDomain) { return this.setRawDomain(newDomain && encodeURIComponent(newDomain)); }; URI.prototype.setRawDomain = function (newDomain) { this.domain_ = newDomain ? newDomain : null; // Maintain the invariant that paths must start with a slash when the URI // is not path-relative. return this.setRawPath(this.path_); }; URI.prototype.hasDomain = function () { return null !== this.domain_; }; URI.prototype.getPort = function () { return this.port_ && decodeURIComponent(this.port_); }; URI.prototype.setPort = function (newPort) { if (newPort) { newPort = Number(newPort); if (newPort !== (newPort & 0xffff)) { throw new Error('Bad port number ' + newPort); } this.port_ = '' + newPort; } else { this.port_ = null; } return this; }; URI.prototype.hasPort = function () { return null !== this.port_; }; URI.prototype.getPath = function () { return this.path_ && decodeURIComponent(this.path_); }; URI.prototype.getRawPath = function () { return this.path_; }; URI.prototype.setPath = function (newPath) { return this.setRawPath(encodeIfExists2(newPath, URI_DISALLOWED_IN_PATH_)); }; URI.prototype.setRawPath = function (newPath) { if (newPath) { newPath = String(newPath); this.path_ = // Paths must start with '/' unless this is a path-relative URL. (!this.domain_ || /^\//.test(newPath)) ? newPath : '/' + newPath; } else { this.path_ = null; } return this; }; URI.prototype.hasPath = function () { return null !== this.path_; }; URI.prototype.getQuery = function () { // From http://www.w3.org/Addressing/URL/4_URI_Recommentations.html // Within the query string, the plus sign is reserved as shorthand notation // for a space. return this.query_ && decodeURIComponent(this.query_).replace(/\+/g, ' '); }; URI.prototype.getRawQuery = function () { return this.query_; }; URI.prototype.setQuery = function (newQuery) { this.paramCache_ = null; this.query_ = encodeIfExists(newQuery); return this; }; URI.prototype.setRawQuery = function (newQuery) { this.paramCache_ = null; this.query_ = newQuery ? newQuery : null; return this; }; URI.prototype.hasQuery = function () { return null !== this.query_; }; /** * sets the query given a list of strings of the form * [ key0, value0, key1, value1, ... ]. * *

uri.setAllParameters(['a', 'b', 'c', 'd']).getQuery() * will yield 'a=b&c=d'. */ URI.prototype.setAllParameters = function (params) { if (typeof params === 'object') { if (!(params instanceof Array) && (params instanceof Object || Object.prototype.toString.call(params) !== '[object Array]')) { var newParams = []; var i = -1; for (var k in params) { var v = params[k]; if ('string' === typeof v) { newParams[++i] = k; newParams[++i] = v; } } params = newParams; } } this.paramCache_ = null; var queryBuf = []; var separator = ''; for (var j = 0; j < params.length;) { var k = params[j++]; var v = params[j++]; queryBuf.push(separator, encodeURIComponent(k.toString())); separator = '&'; if (v) { queryBuf.push('=', encodeURIComponent(v.toString())); } } this.query_ = queryBuf.join(''); return this; }; URI.prototype.checkParameterCache_ = function () { if (!this.paramCache_) { var q = this.query_; if (!q) { this.paramCache_ = []; } else { var cgiParams = q.split(/[&\?]/); var out = []; var k = -1; for (var i = 0; i < cgiParams.length; ++i) { var m = cgiParams[i].match(/^([^=]*)(?:=(.*))?$/); // From http://www.w3.org/Addressing/URL/4_URI_Recommentations.html // Within the query string, the plus sign is reserved as shorthand // notation for a space. out[++k] = decodeURIComponent(m[1]).replace(/\+/g, ' '); out[++k] = decodeURIComponent(m[2] || '').replace(/\+/g, ' '); } this.paramCache_ = out; } } }; /** * sets the values of the named cgi parameters. * *

So, uri.parse('foo?a=b&c=d&e=f').setParameterValues('c', ['new']) * yields foo?a=b&c=new&e=f.

* * @param key {string} * @param values {Array.} the new values. If values is a single string * then it will be treated as the sole value. */ URI.prototype.setParameterValues = function (key, values) { // be nice and avoid subtle bugs where [] operator on string performs charAt // on some browsers and crashes on IE if (typeof values === 'string') { values = [ values ]; } this.checkParameterCache_(); var newValueIndex = 0; var pc = this.paramCache_; var params = []; for (var i = 0, k = 0; i < pc.length; i += 2) { if (key === pc[i]) { if (newValueIndex < values.length) { params.push(key, values[newValueIndex++]); } } else { params.push(pc[i], pc[i + 1]); } } while (newValueIndex < values.length) { params.push(key, values[newValueIndex++]); } this.setAllParameters(params); return this; }; URI.prototype.removeParameter = function (key) { return this.setParameterValues(key, []); }; /** * returns the parameters specified in the query part of the uri as a list of * keys and values like [ key0, value0, key1, value1, ... ]. * * @return {Array.} */ URI.prototype.getAllParameters = function () { this.checkParameterCache_(); return this.paramCache_.slice(0, this.paramCache_.length); }; /** * returns the values for a given cgi parameter as a list of decoded * query parameter values. * @return {Array.} */ URI.prototype.getParameterValues = function (paramNameUnescaped) { this.checkParameterCache_(); var values = []; for (var i = 0; i < this.paramCache_.length; i += 2) { if (paramNameUnescaped === this.paramCache_[i]) { values.push(this.paramCache_[i + 1]); } } return values; }; /** * returns a map of cgi parameter names to (non-empty) lists of values. * @return {Object.>} */ URI.prototype.getParameterMap = function (paramNameUnescaped) { this.checkParameterCache_(); var paramMap = {}; for (var i = 0; i < this.paramCache_.length; i += 2) { var key = this.paramCache_[i++], value = this.paramCache_[i++]; if (!(key in paramMap)) { paramMap[key] = [value]; } else { paramMap[key].push(value); } } return paramMap; }; /** * returns the first value for a given cgi parameter or null if the given * parameter name does not appear in the query string. * If the given parameter name does appear, but has no '=' following * it, then the empty string will be returned. * @return {string|null} */ URI.prototype.getParameterValue = function (paramNameUnescaped) { this.checkParameterCache_(); for (var i = 0; i < this.paramCache_.length; i += 2) { if (paramNameUnescaped === this.paramCache_[i]) { return this.paramCache_[i + 1]; } } return null; }; URI.prototype.getFragment = function () { return this.fragment_ && decodeURIComponent(this.fragment_); }; URI.prototype.getRawFragment = function () { return this.fragment_; }; URI.prototype.setFragment = function (newFragment) { this.fragment_ = newFragment ? encodeURIComponent(newFragment) : null; return this; }; URI.prototype.setRawFragment = function (newFragment) { this.fragment_ = newFragment ? newFragment : null; return this; }; URI.prototype.hasFragment = function () { return null !== this.fragment_; }; function nullIfAbsent(matchPart) { return ('string' == typeof matchPart) && (matchPart.length > 0) ? matchPart : null; } /** * a regular expression for breaking a URI into its component parts. * *

http://www.gbiv.com/protocols/uri/rfc/rfc3986.html#RFC2234 says * As the "first-match-wins" algorithm is identical to the "greedy" * disambiguation method used by POSIX regular expressions, it is natural and * commonplace to use a regular expression for parsing the potential five * components of a URI reference. * *

The following line is the regular expression for breaking-down a * well-formed URI reference into its components. * * 

 * ^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?
 *  12            3  4          5       6  7        8 9
 *
* *

The numbers in the second line above are only to assist readability; they * indicate the reference points for each subexpression (i.e., each paired * parenthesis). We refer to the value matched for subexpression as $. * For example, matching the above expression to * 

 *     http://www.ics.uci.edu/pub/ietf/uri/#Related
 *
* results in the following subexpression matches: * 
 *    $1 = http:
 *    $2 = http
 *    $3 = //www.ics.uci.edu
 *    $4 = www.ics.uci.edu
 *    $5 = /pub/ietf/uri/
 *    $6 = 
 *    $7 = 
 *    $8 = #Related
 *    $9 = Related
 *
* where indicates that the component is not present, as is the * case for the query component in the above example. Therefore, we can * determine the value of the five components as * 
 *    scheme    = $2
 *    authority = $4
 *    path      = $5
 *    query     = $7
 *    fragment  = $9
 *
* *

msamuel: I have modified the regular expression slightly to expose the * credentials, domain, and port separately from the authority. * The modified version yields * 

 *    $1 = http              scheme
 *    $2 =        credentials -\
 *    $3 = www.ics.uci.edu   domain       | authority
 *    $4 =        port        -/
 *    $5 = /pub/ietf/uri/    path
 *    $6 =        query without ?
 *    $7 = Related           fragment without #
 *
*/ var URI_RE_ = new RegExp( "^" + "(?:" + "([^:/?#]+)" + // scheme ":)?" + "(?://" + "(?:([^/?#]*)@)?" + // credentials "([^/?#:@]*)" + // domain "(?::([0-9]+))?" + // port ")?" + "([^?#]+)?" + // path "(?:\\?([^#]*))?" + // query "(?:#(.*))?" + // fragment "$" ); var URI_DISALLOWED_IN_SCHEME_OR_CREDENTIALS_ = /[#\/\?@]/g; var URI_DISALLOWED_IN_PATH_ = /[\#\?]/g; URI.parse = parse; URI.create = create; URI.resolve = resolve; URI.collapse_dots = collapse_dots; // Visible for testing. // lightweight string-based api for loadModuleMaker URI.utils = { mimeTypeOf: function (uri) { var uriObj = parse(uri); if (/\.html$/.test(uriObj.getPath())) { return 'text/html'; } else { return 'application/javascript'; } }, resolve: function (base, uri) { if (base) { return resolve(parse(base), parse(uri)).toString(); } else { return '' + uri; } } }; return URI; })(); // Exports for closure compiler. if (typeof window !== 'undefined') { window['URI'] = URI; } ; // Copyright (C) 2011 Google Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. /** * @fileoverview * JavaScript support for client-side CSS sanitization. * The CSS property schema API is defined in CssPropertyPatterns.java which * is used to generate css-defs.js. * * @author mikesamuel@gmail.com * \@requires CSS_PROP_BIT_GLOBAL_NAME * \@requires CSS_PROP_BIT_HASH_VALUE * \@requires CSS_PROP_BIT_NEGATIVE_QUANTITY * \@requires CSS_PROP_BIT_PROPERTY_NAME * \@requires CSS_PROP_BIT_QUANTITY * \@requires CSS_PROP_BIT_QSTRING * \@requires CSS_PROP_BIT_UNRESERVED_WORD * \@requires CSS_PROP_BIT_URL * \@requires cssSchema * \@requires decodeCss * \@requires html4 * \@requires URI * \@overrides window * \@requires parseCssStylesheet * \@provides sanitizeCssProperty * \@provides sanitizeCssSelectorList * \@provides sanitizeStylesheet * \@provides sanitizeStylesheetWithExternals * \@provides sanitizeMediaQuery */ var sanitizeCssProperty = undefined; var sanitizeCssSelectorList = undefined; var sanitizeStylesheet = undefined; var sanitizeStylesheetWithExternals = undefined; var sanitizeMediaQuery = undefined; (function () { var NOEFFECT_URL = 'url("about:blank")'; /** * The set of characters that need to be normalized inside url("..."). * We normalize newlines because they are not allowed inside quoted strings, * normalize quote characters, angle-brackets, and asterisks because they * could be used to break out of the URL or introduce targets for CSS * error recovery. We normalize parentheses since they delimit unquoted * URLs and calls and could be a target for error recovery. */ var NORM_URL_REGEXP = /[\n\f\r\"\'()*<>]/g; /** The replacements for NORM_URL_REGEXP. */ var NORM_URL_REPLACEMENTS = { '\n': '%0a', '\f': '%0c', '\r': '%0d', '"': '%22', '\'': '%27', '(': '%28', ')': '%29', '*': '%2a', '<': '%3c', '>': '%3e' }; function normalizeUrl(s) { if ('string' === typeof s) { return 'url("' + s.replace(NORM_URL_REGEXP, normalizeUrlChar) + '")'; } else { return NOEFFECT_URL; } } function normalizeUrlChar(ch) { return NORM_URL_REPLACEMENTS[ch]; } // From RFC3986 var URI_SCHEME_RE = new RegExp( '^' + '(?:' + '([^:\/?# ]+)' + // scheme ':)?' ); var ALLOWED_URI_SCHEMES = /^(?:https?|mailto)$/i; function resolveUri(baseUri, uri) { if (baseUri) { return URI.utils.resolve(baseUri, uri); } return uri; } function safeUri(uri, prop, naiveUriRewriter) { if (!naiveUriRewriter) { return null; } var parsed = ('' + uri).match(URI_SCHEME_RE); if (parsed && (!parsed[1] || ALLOWED_URI_SCHEMES.test(parsed[1]))) { return naiveUriRewriter(uri, prop); } else { return null; } } function withoutVendorPrefix(ident) { // http://stackoverflow.com/a/5411098/20394 has a fairly extensive list // of vendor prefices. // Blink has not declared a vendor prefix distinct from -webkit- // and http://css-tricks.com/tldr-on-vendor-prefix-drama/ discusses // how Mozilla recognizes some -webkit- // http://wiki.csswg.org/spec/vendor-prefixes talks more about // cross-implementation, and lists other prefixes. // Note: info is duplicated in CssValidator.java return ident.replace( /^-(?:apple|css|epub|khtml|moz|mso?|o|rim|wap|webkit|xv)-(?=[a-z])/, ''); } /** * Given a series of normalized CSS tokens, applies a property schema, as * defined in CssPropertyPatterns.java, and sanitizes the tokens in place. * @param property a property name. * @param tokens as parsed by lexCss. Modified in place. * @param opt_naiveUriRewriter a URI rewriter; an object with a "rewrite" * function that takes a URL and returns a safe URL. * @param opt_baseURI a URI against which all relative URLs in tokens will * be resolved. * @param opt_idSuffix {string} appended to all IDs to scope them. */ sanitizeCssProperty = (function () { function unionArrays(arrs) { var map = {}; for (var i = arrs.length; --i >= 0;) { var arr = arrs[i]; for (var j = arr.length; --j >= 0;) { map[arr[j]] = ALLOWED_LITERAL; } } return map; } // Used as map value to avoid hasOwnProperty checks. var ALLOWED_LITERAL = {}; return function sanitize( property, tokens, opt_naiveUriRewriter, opt_baseUri, opt_idSuffix) { var propertyKey = withoutVendorPrefix(property); var propertySchema = cssSchema[propertyKey]; // If the property isn't recognized, elide all tokens. if (!propertySchema || 'object' !== typeof propertySchema) { tokens.length = 0; return; } var propBits = propertySchema['cssPropBits']; /** * Recurse to apply the appropriate function schema to the function call * that starts at {@code tokens[start]}. * @param {Array.} tokens an array of CSS token that is modified * in place so that all tokens involved in the function call * (from {@code tokens[start]} to a close parenthesis) are folded to * one token. * @param {number} start an index into tokens of a function token like * {@code 'name('}. * @return the replacement function or the empty string if the function * call is not both well-formed and allowed. */ function sanitizeFunctionCall(tokens, start) { var parenDepth = 1, end = start + 1, n = tokens.length; while (end < n && parenDepth) { var token = tokens[end++]; // Decrement if we see a close parenthesis, and increment if we // see a function. Since url(...) are whole tokens, they will not // affect the token scanning. parenDepth += (token === ')' ? -1 : /^[^"']*\($/.test(token)); } // Allow error-recovery from unclosed functions by ignoring the call and // so allowing resumption at the next ';'. if (!parenDepth) { var fnToken = tokens[start].toLowerCase(); var bareFnToken = withoutVendorPrefix(fnToken); // Cut out the originals, so the caller can step by one token. var fnTokens = tokens.splice(start, end - start, ''); var fns = propertySchema['cssFns']; // Look for a function that matches the name. for (var i = 0, nFns = fns.length; i < nFns; ++i) { if (fns[i].substring(0, bareFnToken.length) == bareFnToken) { fnTokens[0] = fnTokens[fnTokens.length - 1] = ''; // Recurse and sanitize the function parameters. sanitize( fns[i], // The actual parameters to the function. fnTokens, opt_naiveUriRewriter, opt_baseUri); // Reconstitute the function from its parameter tokens. return fnToken + fnTokens.join(' ') + ')'; } } } return ''; } // Used to determine whether to treat quoted strings as URLs or // plain text content, and whether unrecognized keywords can be quoted // to treat ['Arial', 'Black'] equivalently to ['"Arial Black"']. var stringDisposition = propBits & (CSS_PROP_BIT_URL | CSS_PROP_BIT_UNRESERVED_WORD); // Used to determine what to do with unreserved words. var identDisposition = propBits & (CSS_PROP_BIT_GLOBAL_NAME | CSS_PROP_BIT_PROPERTY_NAME); // Used to join unquoted keywords into a single quoted string. var lastQuoted = NaN; var i = 0, k = 0; for (;i < tokens.length; ++i) { // Has the effect of normalizing hex digits, keywords, // and function names. var token = tokens[i].toLowerCase(); var cc = token.charCodeAt(0), cc1, cc2, isnum1, isnum2, end; var litGroup, litMap; token = ( // Strip out spaces. Normally cssparser.js dumps these, but we // strip them out in case the content doesn't come via cssparser.js. (cc === ' '.charCodeAt(0)) ? '' : (cc === '"'.charCodeAt(0)) ? ( // Quoted string. (stringDisposition === CSS_PROP_BIT_URL) ? (opt_naiveUriRewriter // Sanitize and convert to url("...") syntax. // Treat url content as case-sensitive. ? (normalizeUrl( // Rewrite to a safe URI. safeUri( // Convert to absolute URL resolveUri( opt_baseUri, // Strip off quotes decodeCss(tokens[i].substring(1, token.length - 1))), propertyKey, opt_naiveUriRewriter))) : '') : ((propBits & CSS_PROP_BIT_QSTRING) // Ambiguous when more than one bit set in disposition. && !(stringDisposition & (stringDisposition - 1))) ? token // Drop if quoted strings not allowed. : '' ) // inherit is always allowed. : token === 'inherit' ? token : ( litGroup = propertySchema['cssLitGroup'], litMap = (litGroup ? (propertySchema['cssLitMap'] // Lazily compute the union from litGroup. || (propertySchema['cssLitMap'] = unionArrays(litGroup))) : ALLOWED_LITERAL), // A convenient empty object. (litMap[withoutVendorPrefix(token)] === ALLOWED_LITERAL) ) // Token is in the literal map or matches extra. ? token // Preserve hash color literals if allowed. : (cc === '#'.charCodeAt(0) && /^#(?:[0-9a-f]{3}){1,2}$/.test(token)) ? (propBits & CSS_PROP_BIT_HASH_VALUE ? token : '') : ('0'.charCodeAt(0) <= cc && cc <= '9'.charCodeAt(0)) // A number starting with a digit. ? ((propBits & CSS_PROP_BIT_QUANTITY) ? token : '') // Normalize quantities so they don't start with a '.' or '+' sign and // make sure they all have an integer component so can't be confused // with a dotted identifier. // This can't be done in the lexer since ".4" is a valid rule part. : (cc1 = token.charCodeAt(1), cc2 = token.charCodeAt(2), isnum1 = '0'.charCodeAt(0) <= cc1 && cc1 <= '9'.charCodeAt(0), isnum2 = '0'.charCodeAt(0) <= cc2 && cc2 <= '9'.charCodeAt(0), // +.5 -> 0.5 if allowed. (cc === '+'.charCodeAt(0) && (isnum1 || (cc1 === '.'.charCodeAt(0) && isnum2)))) ? ((propBits & CSS_PROP_BIT_QUANTITY) ? ((isnum1 ? '' : '0') + token.substring(1)) : '') // -.5 -> -0.5 if allowed otherwise -> 0 if quantities allowed. : (cc === '-'.charCodeAt(0) && (isnum1 || (cc1 === '.'.charCodeAt(0) && isnum2))) ? ((propBits & CSS_PROP_BIT_NEGATIVE_QUANTITY) ? ((isnum1 ? '-' : '-0') + token.substring(1)) : ((propBits & CSS_PROP_BIT_QUANTITY) ? '0' : '')) // .5 -> 0.5 if allowed. : (cc === '.'.charCodeAt(0) && isnum1) ? ((propBits & CSS_PROP_BIT_QUANTITY) ? '0' + token : '') // Handle url("...") by rewriting the body. : ('url("' === token.substring(0, 5)) ? ((opt_naiveUriRewriter && (propBits & CSS_PROP_BIT_URL)) ? normalizeUrl(safeUri(resolveUri(opt_baseUri, tokens[i].substring(5, token.length - 2)), propertyKey, opt_naiveUriRewriter)) : '') // Handle func(...) by recursing. // Functions start at a token like "name(" and end with a ")" taking // into account nesting. : (token.charAt(token.length-1) === '(') ? sanitizeFunctionCall(tokens, i) : (identDisposition && /^-?[a-z_][\w\-]*$/.test(token) && !/__$/.test(token)) ? (opt_idSuffix && identDisposition === CSS_PROP_BIT_GLOBAL_NAME ? tokens[i] + opt_idSuffix // use original token, not lowercased : (identDisposition === CSS_PROP_BIT_PROPERTY_NAME && cssSchema[token] && 'number' === typeof cssSchema[token].cssPropBits) ? token : '') : (/^\w+$/.test(token) && stringDisposition === CSS_PROP_BIT_UNRESERVED_WORD && (propBits & CSS_PROP_BIT_QSTRING)) // Quote unrecognized keywords so font names like // Arial Bold // -> // "Arial Bold" ? (lastQuoted+1 === k // If the last token was also a keyword that was quoted, then // combine this token into that. ? (tokens[lastQuoted] = ( tokens[lastQuoted].substring(0, tokens[lastQuoted].length-1) + ' ' + token + '"'), token = '') : (lastQuoted = k, '"' + token + '"')) // Disallowed. : ''); if (token) { tokens[k++] = token; } } // For single URL properties, if the URL failed to pass the sanitizer, // then just drop it. if (k === 1 && tokens[0] === NOEFFECT_URL) { k = 0; } tokens.length = k; }; })(); // Note, duplicated in CssRewriter.java // Constructed from // https://developer.mozilla.org/en-US/docs/Web/CSS/Reference // https://developer.mozilla.org/en-US/docs/Web/CSS/Pseudo-classes // http://dev.w3.org/csswg/selectors4/ var PSEUDO_SELECTOR_WHITELIST = new RegExp( '^(active|after|before|blank|checked|default|disabled' + '|drop|empty|enabled|first|first-child|first-letter' + '|first-line|first-of-type|fullscreen|focus|hover' + '|in-range|indeterminate|invalid|last-child|last-of-type' + '|left|link|only-child|only-of-type|optional|out-of-range' + '|placeholder-shown|read-only|read-write|required|right' + '|root|scope|user-error|valid|visited' + ')$'); // Set of punctuation tokens that are child/sibling selectors. var COMBINATOR = {}; COMBINATOR['>'] = COMBINATOR['+'] = COMBINATOR['~'] = COMBINATOR; /** * Given a series of tokens, returns a list of sanitized selectors. * @param {Array.} selectors In the form produced by csslexer.js. * @param {{ * containerClass: ?string, * idSuffix: string, * tagPolicy: function(string, Array.): ?Array., * virtualizeAttrName: ?function(string, string): ?string * }} virtualization An object like * If containerClass is {@code "sfx"} and idSuffix is {@code "-sfx"}, the * selector * {@code ["a", "#foo", " ", "b", ".bar"]} will be namespaced to * {@code [".sfx", " ", "a", "#foo-sfx", " ", "b", ".bar"]}. * @param {function(Array.): boolean} opt_onUntranslatableSelector * When a selector cannot be translated, this function is called with the * non-whitespace/comment tokens comprising the selector and returns a * value indicating whether to continue processing the selector list. * If it returns falsey, then processing is aborted and null is returned. * If not present or it returns truthy, then the complex selector is * dropped from the selector list. * @return {Array.}? an array of sanitized selectors. * Null when the untraslatable compound selector handler aborts processing. */ sanitizeCssSelectorList = function( selectors, virtualization, opt_onUntranslatableSelector) { var containerClass = virtualization.containerClass; var idSuffix = virtualization.idSuffix; var tagPolicy = virtualization.tagPolicy; var sanitized = []; // Remove any spaces that are not operators. var k = 0, i, inBrackets = 0, tok; for (i = 0; i < selectors.length; ++i) { tok = selectors[i]; if ( (tok == '(' || tok == '[') ? (++inBrackets, true) : (tok == ')' || tok == ']') ? (inBrackets && --inBrackets, true) : !(selectors[i] == ' ' && (inBrackets || COMBINATOR[selectors[i-1]] === COMBINATOR || COMBINATOR[selectors[i+1]] === COMBINATOR)) ) { selectors[k++] = selectors[i]; } } selectors.length = k; // Split around commas. If there is an error in one of the comma separated // bits, we throw the whole away, but the failure of one selector does not // affect others except that opt_onUntranslatableSelector allows one to // treat the entire output as unusable. var n = selectors.length, start = 0; for (i = 0; i < n; ++i) { if (selectors[i] === ',') { // TODO: ignore ',' inside brackets. if (!processComplexSelector(start, i)) { return null; } start = i+1; } } if (!processComplexSelector(start, n)) { return null; } function processComplexSelector(start, end) { // Space around commas is not an operator. if (selectors[start] === ' ') { ++start; } if (end-1 !== start && selectors[end] === ' ') { --end; } // Split the selector into element selectors, content around // space (ancestor operator) and '>' (descendant operator). var out = []; var lastOperator = start; var valid = true; // True iff out contains a valid complex selector. for (var i = start; valid && i < end; ++i) { var tok = selectors[i]; if (COMBINATOR[tok] === COMBINATOR || tok === ' ') { // We've found the end of a single link in the selector chain. if (!processCompoundSelector(lastOperator, i, tok)) { valid = false; } else { lastOperator = i+1; } } } if (!processCompoundSelector(lastOperator, end, '')) { valid = false; } function processCompoundSelector(start, end, combinator) { // Split the element selector into four parts. // DIV.foo#bar[href]:hover // ^ ^ ^ // el classes attrs pseudo var element, classId, attrs, pseudoSelector, tok, // The current token // valid implies the parts above comprise a sanitized selector. valid = true; element = ''; if (start < end) { tok = selectors[start]; if (tok === '*') { ++start; element = tok; } else if (/^[a-zA-Z]/.test(tok)) { // is an element selector var decision = tagPolicy(tok.toLowerCase(), []); if (decision) { if ('tagName' in decision) { tok = decision['tagName']; } ++start; element = tok; } } } classId = ''; attrs = ''; pseudoSelector = ''; for (;valid && start < end; ++start) { tok = selectors[start]; if (tok.charAt(0) === '#') { if (/^#_|__$|[^\w#:\-]/.test(tok)) { valid = false; } else { // Rewrite ID elements to include the suffix. classId += tok + idSuffix; } } else if (tok === '.') { if (++start < end && /^[0-9A-Za-z:_\-]+$/.test(tok = selectors[start]) && !/^_|__$/.test(tok)) { classId += '.' + tok; } else { valid = false; } } else if (start + 1 < end && selectors[start] === '[') { ++start; var vAttr = selectors[start++].toLowerCase(); // Schema lookup for type information var atype = html4.ATTRIBS[element + '::' + vAttr]; if (atype !== +atype) { atype = html4.ATTRIBS['*::' + vAttr]; } var rAttr; // Consult policy // TODO(kpreid): Making this optional is a kludge to avoid changing // the public interface until we have a more well-structured design. if (virtualization.virtualizeAttrName) { rAttr = virtualization.virtualizeAttrName(element, vAttr); if (typeof rAttr !== 'string') { // rejected valid = false; rAttr = vAttr; } // don't reject even if not in schema if (valid && atype !== +atype) { atype = html4.atype['NONE']; } } else { rAttr = vAttr; if (atype !== +atype) { // not permitted according to schema valid = false; } } var op = '', value = '', ignoreCase = false; if (/^[~^$*|]?=$/.test(selectors[start])) { op = selectors[start++]; value = selectors[start++]; // Quote identifier values. if (/^[0-9A-Za-z:_\-]+$/.test(value)) { value = '"' + value + '"'; } else if (value === ']') { value = '""'; --start; } // Reject unquoted values. if (!/^"([^\"\\]|\\.)*"$/.test(value)) { valid = false; } ignoreCase = selectors[start] === "i"; if (ignoreCase) { ++start; } } if (selectors[start] !== ']') { ++start; valid = false; } // TODO: replace this with a lookup table that also provides a // function from operator and value to testable value. switch (atype) { case html4.atype['CLASSES']: case html4.atype['LOCAL_NAME']: case html4.atype['NONE']: break; case html4.atype['GLOBAL_NAME']: case html4.atype['ID']: case html4.atype['IDREF']: if ((op === '=' || op === '~=' || op === '$=') && value != '""' && !ignoreCase) { // The suffix is case-sensitive, so we can't translate case // ignoring matches. value = '"' + value.substring(1, value.length-1) + idSuffix + '"'; } else if (op === '|=' || op === '') { // Ok. a|=b -> a == b || a.startsWith(b + "-") and since we // use "-" to separate the suffix from the identifier, we can // allow this through unmodified. // Existence checks are also ok. } else { // Can't correctly handle prefix and substring operators // without leaking information about the suffix. valid = false; } break; case html4.atype['URI']: case html4.atype['URI_FRAGMENT']: // URIs are rewritten, so we can't meanginfully translate URI // selectors besides the common a[href] one that is used to // distinguish links from naming anchors. if (op !== '') { valid = false; } break; // TODO: IDREFS default: valid = false; } if (valid) { attrs += '[' + rAttr.replace(/[^\w-]/g, '\\$&') + op + value + (ignoreCase ? ' i]' : ']'); } } else if (start < end && selectors[start] === ':') { tok = selectors[++start]; if (PSEUDO_SELECTOR_WHITELIST.test(tok)) { pseudoSelector += ':' + tok; } else { break; } } else { break; // Unrecognized token. } } if (start !== end) { // Tokens not consumed. valid = false; } if (valid) { // ':' is allowed in identifiers, but is also the // pseudo-selector separator, so ':' in preceding parts needs to // be escaped. var selector = (element + classId).replace(/[^ .*#\w-]/g, '\\$&') + attrs + pseudoSelector + combinator; if (selector) { out.push(selector); } } return valid; } if (valid) { if (out.length) { var safeSelector = out.join(''); // Namespace the selector so that it only matches under // a node with suffix in its CLASS attribute. if (containerClass !== null) { safeSelector = '.' + containerClass + ' ' + safeSelector; } sanitized.push(safeSelector); } // else nothing there. return true; } else { return !opt_onUntranslatableSelector || opt_onUntranslatableSelector(selectors.slice(start, end)); } } return sanitized; }; (function () { var MEDIA_TYPE = '(?:' + 'all|aural|braille|embossed|handheld|print' + '|projection|screen|speech|tty|tv' + ')'; // A white-list of media features extracted from the "Pseudo-BNF" in // http://dev.w3.org/csswg/mediaqueries4/#media1 and // https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Media_queries var MEDIA_FEATURE = '(?:' + '(?:min-|max-)?' + '(?:' + ( '(?:device-)?' + '(?:aspect-ratio|height|width)' + '|color(?:-index)?' + '|monochrome' + '|orientation' + '|resolution' ) + ')' + '|grid' + '|hover' + '|luminosity' + '|pointer' + '|scan' + '|script' + ')'; var LENGTH_UNIT = '(?:p[cxt]|[cem]m|in|dpi|dppx|dpcm|%)'; var CSS_VALUE = '-?(?:' + '[a-z]\\w+(?:-\\w+)*' // An identifier // A length or scalar quantity, or a rational number. // dev.w3.org/csswg/mediaqueries4/#values introduces a ratio value-type // to allow matching aspect ratios like "4 / 3". + '|\\d+(?: / \\d+|(?:\\.\\d+)?' + LENGTH_UNIT + '?)' + ')'; var MEDIA_EXPR = '\\( ' + MEDIA_FEATURE + ' (?:' + ': ' + CSS_VALUE + ' )?\\)'; var MEDIA_QUERY = '(?:' + '(?:(?:(?:only|not) )?' + MEDIA_TYPE + '|' + MEDIA_EXPR + ')' // We use 'and ?' since 'and(' is a single CSS function token while // 'and (' parses to two separate tokens -- IDENT "and", DELIM "(". + '(?: and ?' + MEDIA_EXPR + ')*' + ')'; var STARTS_WITH_KEYWORD_REGEXP = /^\w/; var MEDIA_QUERY_LIST_REGEXP = new RegExp( '^' + MEDIA_QUERY + '(?: , ' + MEDIA_QUERY + ')*' + '$', 'i' ); /** * Sanitizes a media query as defined in * http://dev.w3.org/csswg/mediaqueries4/#syntax *
* Media Queries allow authors to adapt the style applied to a document * based on the environment the document is being rendered in. *
* * @param {Array.} cssTokens an array of tokens of the kind produced * by cssLexers. * @return {string} a CSS media query. This may be the empty string, or if * the input is invalid, then a query that is always false. */ sanitizeMediaQuery = function (cssTokens) { cssTokens = cssTokens.slice(); // Strip out space tokens. var nTokens = cssTokens.length, k = 0; for (var i = 0; i < nTokens; ++i) { var tok = cssTokens[i]; if (tok != ' ') { cssTokens[k++] = tok; } } cssTokens.length = k; var css = cssTokens.join(' '); css = ( !css.length ? '' // Always true per the spec. : !(MEDIA_QUERY_LIST_REGEXP.test(css)) ? 'not all' // Always false. // Emit as-is if it starts with 'only', 'not' or a media type. : STARTS_WITH_KEYWORD_REGEXP.test(css) ? css : 'not all , ' + css // Not ambiguous with a URL. ); return css; }; }()); (function () { /** * Extracts a url out of an at-import rule of the form: * \@import "mystyle.css"; * \@import url("mystyle.css"); * * Returns null if no valid url was found. */ function cssParseUri(candidate) { var string1 = /^\s*["]([^"]*)["]\s*$/; var string2 = /^\s*[']([^']*)[']\s*$/; var url1 = /^\s*url\s*[(]["]([^"]*)["][)]\s*$/; var url2 = /^\s*url\s*[(][']([^']*)['][)]\s*$/; // Not officially part of the CSS2.1 grammar // but supported by Chrome var url3 = /^\s*url\s*[(]([^)]*)[)]\s*$/; var match; if ((match = string1.exec(candidate))) { return match[1]; } else if ((match = string2.exec(candidate))) { return match[1]; } else if ((match = url1.exec(candidate))) { return match[1]; } else if ((match = url2.exec(candidate))) { return match[1]; } else if ((match = url3.exec(candidate))) { return match[1]; } return null; } /** * @param {string} baseUri a string against which relative urls are * resolved. * @param {string} cssText a string containing a CSS stylesheet. * @param {{ * containerClass: ?string, * idSuffix: string, * tagPolicy: function(string, Array.): ?Array., * virtualizeAttrName: ?function(string, string): ?string * }} virtualization An object like * If containerClass is {@code "sfx"} and idSuffix is {@code "-sfx"}, the * selector * {@code ["a", "#foo", " ", "b", ".bar"]} will be namespaced to * {@code [".sfx", " ", "a", "#foo-sfx", " ", "b", ".bar"]}. * @param {function(string, string)} naiveUriRewriter maps URLs of media * (images, sounds) that appear as CSS property values to sanitized * URLs or null if the URL should not be allowed as an external media * file in sanitized CSS. * @param {undefined|function({toString: function ():string}, boolean)} * continuation * callback that receives the result of loading imported CSS. * The callback is called with * (cssContent : function ():string, moreToCome : boolean) * where cssContent is the CSS at the imported URL, and moreToCome is * true when the external URL itself loaded other external URLs. * If the output of the original call is stringified when moreToCome is * false, then it will be complete. * @param {Array.} opt_importCount the number of imports that need * to be satisfied before there is no more pending content. * @return {{result:{toString:function ():string},moreToCome:boolean}} * the CSS text, and a flag that indicates whether there are pending * imports that will be passed to continuation. */ function sanitizeStylesheetInternal( baseUri, cssText, virtualization, naiveUriRewriter, naiveUriFetcher, continuation, opt_importCount) { var safeCss = void 0; // Return a result with moreToCome===true when the last import has been // sanitized. var importCount = opt_importCount || [0]; // A stack describing the { ... } regions. // Null elements indicate blocks that should not be emitted. var blockStack = []; // True when the content of the current block should be left off safeCss. var elide = false; parseCssStylesheet( cssText, { 'startStylesheet': function () { safeCss = []; }, 'endStylesheet': function () { }, 'startAtrule': function (atIdent, headerArray) { if (elide) { atIdent = null; } else if (atIdent === '@media') { safeCss.push('@media', ' ', sanitizeMediaQuery(headerArray)); } else if (atIdent === '@keyframes' || atIdent === '@-webkit-keyframes') { var animationId = headerArray[0]; if (headerArray.length === 1 && !/__$|[^\w\-]/.test(animationId)) { safeCss.push( atIdent, ' ', animationId + virtualization.idSuffix); atIdent = '@keyframes'; } else { atIdent = null; } } else { if (atIdent === '@import' && headerArray.length > 0) { atIdent = null; if ('function' === typeof continuation) { var mediaQuery = sanitizeMediaQuery(headerArray.slice(1)); if (mediaQuery !== 'not all') { ++importCount[0]; var placeholder = []; safeCss.push(placeholder); var cssUrl = safeUri( resolveUri(baseUri, cssParseUri(headerArray[0])), function(result) { var sanitized = sanitizeStylesheetInternal( cssUrl, result.html, virtualization, naiveUriRewriter, naiveUriFetcher, continuation, importCount); --importCount[0]; var safeImportedCss = mediaQuery ? { toString: function () { return ( '@media ' + mediaQuery + ' {' + sanitized.result + '}' ); } } : sanitized.result; placeholder[0] = safeImportedCss; continuation(safeImportedCss, !!importCount[0]); }, naiveUriFetcher); } } else { // TODO: Use a logger instead. if (window.console) { window.console.log( '@import ' + headerArray.join(' ') + ' elided'); } } } } elide = !atIdent; blockStack.push(atIdent); }, 'endAtrule': function () { blockStack.pop(); if (!elide) { safeCss.push(';'); } checkElide(); }, 'startBlock': function () { // There are no bare blocks in CSS, so we do not change the // block stack here, but instead in the events that bracket // blocks. if (!elide) { safeCss.push('{'); } }, 'endBlock': function () { if (!elide) { safeCss.push('}'); elide = true; // skip any semicolon from endAtRule. } }, 'startRuleset': function (selectorArray) { if (!elide) { var selector = void 0; if (blockStack[blockStack.length - 1] === '@keyframes') { // Allow [from | to | ] selector = selectorArray.join(' ') .match(/^ *(?:from|to|\d+(?:\.\d+)?%) *(?:, *(?:from|to|\d+(?:\.\d+)?%) *)*$/i); elide = !selector; if (selector) { selector = selector[0].replace(/ +/g, ''); } } else { var selectors = sanitizeCssSelectorList( selectorArray, virtualization); if (!selectors || !selectors.length) { elide = true; } else { selector = selectors.join(', '); } } if (!elide) { safeCss.push(selector, '{'); } } blockStack.push(null); }, 'endRuleset': function () { blockStack.pop(); if (!elide) { safeCss.push('}'); } checkElide(); }, 'declaration': function (property, valueArray) { if (!elide) { var isImportant = false; var nValues = valueArray.length; if (nValues >= 2 && valueArray[nValues - 2] === '!' && valueArray[nValues - 1].toLowerCase() === 'important') { isImportant = true; valueArray.length -= 2; } sanitizeCssProperty( property, valueArray, naiveUriRewriter, baseUri, virtualization.idSuffix); if (valueArray.length) { safeCss.push( property, ':', valueArray.join(' '), isImportant ? ' !important;' : ';'); } } } }); function checkElide() { elide = blockStack.length && blockStack[blockStack.length-1] === null; } return { result : { toString: function () { return safeCss.join(''); } }, moreToCome : !!importCount[0] }; } sanitizeStylesheet = function ( baseUri, cssText, virtualization, naiveUriRewriter) { return sanitizeStylesheetInternal( baseUri, cssText, virtualization, naiveUriRewriter, undefined, undefined).result.toString(); }; sanitizeStylesheetWithExternals = function ( baseUri, cssText, virtualization, naiveUriRewriter, naiveUriFetcher, continuation) { return sanitizeStylesheetInternal( baseUri, cssText, virtualization, naiveUriRewriter, naiveUriFetcher, continuation); }; })(); })(); // Exports for closure compiler. if (typeof window !== 'undefined') { window['sanitizeCssProperty'] = sanitizeCssProperty; window['sanitizeCssSelectorList'] = sanitizeCssSelectorList; window['sanitizeStylesheet'] = sanitizeStylesheet; window['sanitizeMediaQuery'] = sanitizeMediaQuery; } ; // Copyright (C) 2010 Google Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. /** * @fileoverview * Utilities for dealing with CSS source code. * * @author mikesamuel@gmail.com * \@requires lexCss * \@overrides window * \@provides parseCssStylesheet, parseCssDeclarations */ // The Turkish i seems to be a non-issue, but abort in case it is. if ('I'.toLowerCase() !== 'i') { throw 'I/i problem'; } /** * parseCssStylesheet takes a chunk of CSS text and a handler object with * methods that it calls as below: * 
 * // At the beginning of a stylesheet.
 * handler.startStylesheet();
 *
 * // For an @foo rule ended by a semicolon: @import "foo.css";
 * handler.startAtrule('@import', ['"foo.css"']);
 * handler.endAtrule();
 *
 * // For an @foo rule ended with a block. @media print { ... }
 * handler.startAtrule('@media', ['print']);
 * handler.startBlock();
 * // Calls to contents elided.  Probably selectors and declarations as below.
 * handler.endBlock();
 * handler.endAtrule();
 *
 * // For a ruleset: p.clazz q, s { color: blue; }
 * handler.startRuleset(['p', '.', 'clazz', ' ', 'q', ',', ' ', 's']);
 * handler.declaration('color', ['blue']);
 * handler.endRuleset();
 *
 * // At the end of a stylesheet.
 * handler.endStylesheet();
 *
* When errors are encountered, the parser drops the useless tokens and * attempts to resume parsing. * * @param {string} cssText CSS3 content to parse as a stylesheet. * @param {Object} handler An object like 
{
 *   startStylesheet: function () { ... },
 *   endStylesheet: function () { ... },
 *   startAtrule: function (atIdent, headerArray) { ... },
 *   endAtrule: function () { ... },
 *   startBlock: function () { ... },
 *   endBlock: function () { ... },
 *   startRuleset: function (selectorArray) { ... },
 *   endRuleset: function () { ... },
 *   declaration: function (property, valueArray) { ... },
 * }
*/ var parseCssStylesheet; /** * parseCssDeclarations parses a run of declaration productions as seen in the * body of the HTML5 {@code style} attribute. * * @param {string} cssText CSS3 content to parse as a run of declarations. * @param {Object} handler An object like 
{
 *   declaration: function (property, valueArray) { ... },
 * }
*/ var parseCssDeclarations; (function () { // stylesheet : [ CDO | CDC | S | statement ]*; parseCssStylesheet = function(cssText, handler) { var toks = lexCss(cssText); if (handler['startStylesheet']) { handler['startStylesheet'](); } for (var i = 0, n = toks.length; i < n;) { // CDO and CDC ("") are converted to space by the lexer. i = toks[i] === ' ' ? i+1 : statement(toks, i, n, handler); } if (handler['endStylesheet']) { handler['endStylesheet'](); } }; // statement : ruleset | at-rule; function statement(toks, i, n, handler) { if (i < n) { var tok = toks[i]; if (tok.charAt(0) === '@') { return atrule(toks, i, n, handler, true); } else { return ruleset(toks, i, n, handler); } } else { return i; } } // at-rule : ATKEYWORD S* any* [ block | ';' S* ]; function atrule(toks, i, n, handler, blockok) { var start = i++; while (i < n && toks[i] !== '{' && toks[i] !== ';') { ++i; } if (i < n && (blockok || toks[i] === ';')) { var s = start+1, e = i; if (s < n && toks[s] === ' ') { ++s; } if (e > s && toks[e-1] === ' ') { --e; } if (handler['startAtrule']) { handler['startAtrule'](toks[start].toLowerCase(), toks.slice(s, e)); } i = (toks[i] === '{') ? block(toks, i, n, handler) : i+1; // Skip over ';' if (handler['endAtrule']) { handler['endAtrule'](); } } // Else we reached end of input or are missing a semicolon. // Drop the rule on the floor. return i; } // block : '{' S* [ any | block | ATKEYWORD S* | ';' S* ]* '}' S*; // Assumes the leading '{' has been verified by callers. function block(toks, i, n, handler) { ++i; // skip over '{' if (handler['startBlock']) { handler['startBlock'](); } while (i < n) { var ch = toks[i].charAt(0); if (ch == '}') { ++i; break; } if (ch === ' ' || ch === ';') { i = i+1; } else if (ch === '@') { i = atrule(toks, i, n, handler, false); } else if (ch === '{') { i = block(toks, i, n, handler); } else { // Instead of using (any* block) to subsume ruleset we allow either // blocks or rulesets with a non-blank selector. // This is more restrictive but does not require atrule specific // parse tree fixup to realize that the contents of the block in // @media print { ... } // is a ruleset. We just don't care about any block carrying at-rules // whose body content is not ruleset content. i = ruleset(toks, i, n, handler); } } if (handler['endBlock']) { handler['endBlock'](); } return i; } // ruleset : selector? '{' S* declaration? [ ';' S* declaration? ]* '}' S*; function ruleset(toks, i, n, handler) { // toks[s:e] are the selector tokens including internal whitespace. var s = i, e = selector(toks, i, n, true); if (e < 0) { // Skip malformed content per selector calling convention. e = ~e; // Make sure we skip at least one token. return e === s ? e+1 : e; } var tok = toks[e]; if (tok !== '{') { // Make sure we skip at least one token. return e === s ? e+1 : e; } i = e+1; // Skip over '{' // Don't include any trailing space in the selector slice. if (e > s && toks[e-1] === ' ') { --e; } if (handler['startRuleset']) { handler['startRuleset'](toks.slice(s, e)); } while (i < n) { tok = toks[i]; if (tok === '}') { ++i; break; } if (tok === ' ') { i = i+1; } else { i = declaration(toks, i, n, handler); } } if (handler['endRuleset']) { handler['endRuleset'](); } return i; } // selector : any+; // any : [ IDENT | NUMBER | PERCENTAGE | DIMENSION | STRING // | DELIM | URI | HASH | UNICODE-RANGE | INCLUDES // | FUNCTION S* any* ')' | DASHMATCH | '(' S* any* ')' // | '[' S* any* ']' ] S*; // A negative return value, rv, indicates the selector was malformed and // the index at which we stopped is ~rv. function selector(toks, i, n, allowSemi) { var s = i; // The definition of any above can be summed up as // "any run of token except ('[', ']', '(', ')', ':', ';', '{', '}') // or nested runs of parenthesized tokens or square bracketed tokens". // Spaces are significant in the selector. // Selector is used as (selector?) so the below looks for (any*) for // simplicity. var tok; // Keeping a stack pointer actually causes this to minify better since // ".length" and ".push" are a lo of chars. var brackets = [], stackLast = -1; for (;i < n; ++i) { tok = toks[i].charAt(0); if (tok === '[' || tok === '(') { brackets[++stackLast] = tok; } else if ((tok === ']' && brackets[stackLast] === '[') || (tok === ')' && brackets[stackLast] === '(')) { --stackLast; } else if (tok === '{' || tok === '}' || tok === ';' || tok === '@' || (tok === ':' && !allowSemi)) { break; } } if (stackLast >= 0) { // Returns the bitwise inverse of i+1 to indicate an error in the // token stream so that clients can ignore it. i = ~(i+1); } return i; } var ident = /^-?[a-z]/i; function skipDeclaration(toks, i, n) { // TODO(felix8a): maybe skip balanced pairs of {} while (i < n && toks[i] !== ';' && toks[i] !== '}') { ++i; } return i < n && toks[i] === ';' ? i+1 : i; } // declaration : property ':' S* value; // property : IDENT S*; // value : [ any | block | ATKEYWORD S* ]+; function declaration(toks, i, n, handler) { var property = toks[i++]; if (!ident.test(property)) { return skipDeclaration(toks, i, n); } var tok; if (i < n && toks[i] === ' ') { ++i; } if (i == n || toks[i] !== ':') { return skipDeclaration(toks, i, n); } ++i; if (i < n && toks[i] === ' ') { ++i; } // None of the rules we care about want atrules or blocks in value, so // we look for any+ but that is the same as selector but not zero-length. // This gets us the benefit of not emitting any value with mismatched // brackets. var s = i, e = selector(toks, i, n, false); if (e < 0) { // Skip malformed content per selector calling convention. e = ~e; } else { var value = [], valuelen = 0; for (var j = s; j < e; ++j) { tok = toks[j]; if (tok !== ' ') { value[valuelen++] = tok; } } // One of the following is now true: // (1) e is flush with the end of the tokens as in <... style="x:y">. // (2) tok[e] points to a ';' in which case we need to consume the semi. // (3) tok[e] points to a '}' in which case we don't consume it. // (4) else there is bogus unparsed value content at toks[e:]. // Allow declaration flush with end for style attr body. if (e < n) { // 2, 3, or 4 do { tok = toks[e]; if (tok === ';' || tok === '}') { break; } // Don't emit the property if there is questionable trailing content. valuelen = 0; } while (++e < n); if (tok === ';') { ++e; } } if (valuelen && handler['declaration']) { // TODO: coerce non-keyword ident tokens to quoted strings. handler['declaration'](property.toLowerCase(), value); } } return e; } parseCssDeclarations = function(cssText, handler) { var toks = lexCss(cssText); for (var i = 0, n = toks.length; i < n;) { i = toks[i] !== ' ' ? declaration(toks, i, n, handler) : i+1; } }; })(); // Exports for closure compiler. if (typeof window !== 'undefined') { window['parseCssStylesheet'] = parseCssStylesheet; window['parseCssDeclarations'] = parseCssDeclarations; } ; // Copyright Google Inc. // Licensed under the Apache Licence Version 2.0 // Autogenerated at Wed Nov 25 17:35:12 CET 2015 // @overrides window // @provides html4 var html4 = {}; html4.atype = { 'NONE': 0, 'URI': 1, 'URI_FRAGMENT': 11, 'SCRIPT': 2, 'STYLE': 3, 'HTML': 12, 'ID': 4, 'IDREF': 5, 'IDREFS': 6, 'GLOBAL_NAME': 7, 'LOCAL_NAME': 8, 'CLASSES': 9, 'FRAME_TARGET': 10, 'MEDIA_QUERY': 13 }; html4[ 'atype' ] = html4.atype; html4.ATTRIBS = { '*::class': 9, '*::dir': 0, '*::draggable': 0, '*::hidden': 0, '*::id': 4, '*::inert': 0, '*::itemprop': 0, '*::itemref': 6, '*::itemscope': 0, '*::lang': 0, '*::onblur': 2, '*::onchange': 2, '*::onclick': 2, '*::ondblclick': 2, '*::onerror': 2, '*::onfocus': 2, '*::onkeydown': 2, '*::onkeypress': 2, '*::onkeyup': 2, '*::onload': 2, '*::onmousedown': 2, '*::onmousemove': 2, '*::onmouseout': 2, '*::onmouseover': 2, '*::onmouseup': 2, '*::onreset': 2, '*::onscroll': 2, '*::onselect': 2, '*::onsubmit': 2, '*::ontouchcancel': 2, '*::ontouchend': 2, '*::ontouchenter': 2, '*::ontouchleave': 2, '*::ontouchmove': 2, '*::ontouchstart': 2, '*::onunload': 2, '*::spellcheck': 0, '*::style': 3, '*::tabindex': 0, '*::title': 0, '*::translate': 0, 'a::accesskey': 0, 'a::coords': 0, 'a::href': 1, 'a::hreflang': 0, 'a::name': 7, 'a::onblur': 2, 'a::onfocus': 2, 'a::shape': 0, 'a::target': 0, 'a::type': 0, 'area::accesskey': 0, 'area::alt': 0, 'area::coords': 0, 'area::href': 1, 'area::nohref': 0, 'area::onblur': 2, 'area::onfocus': 2, 'area::shape': 0, 'area::target': 10, 'audio::controls': 0, 'audio::loop': 0, 'audio::mediagroup': 5, 'audio::muted': 0, 'audio::preload': 0, 'audio::src': 1, 'bdo::dir': 0, 'blockquote::cite': 1, 'br::clear': 0, 'button::accesskey': 0, 'button::disabled': 0, 'button::name': 8, 'button::onblur': 2, 'button::onfocus': 2, 'button::type': 0, 'button::value': 0, 'canvas::height': 0, 'canvas::width': 0, 'caption::align': 0, 'col::align': 0, 'col::char': 0, 'col::charoff': 0, 'col::span': 0, 'col::valign': 0, 'col::width': 0, 'colgroup::align': 0, 'colgroup::char': 0, 'colgroup::charoff': 0, 'colgroup::span': 0, 'colgroup::valign': 0, 'colgroup::width': 0, 'command::checked': 0, 'command::command': 5, 'command::disabled': 0, 'command::icon': 1, 'command::label': 0, 'command::radiogroup': 0, 'command::type': 0, 'data::value': 0, 'del::cite': 1, 'del::datetime': 0, 'details::open': 0, 'dir::compact': 0, 'div::align': 0, 'dl::compact': 0, 'fieldset::disabled': 0, 'font::color': 0, 'font::face': 0, 'font::size': 0, 'form::accept': 0, 'form::action': 1, 'form::autocomplete': 0, 'form::enctype': 0, 'form::method': 0, 'form::name': 7, 'form::novalidate': 0, 'form::onreset': 2, 'form::onsubmit': 2, 'form::target': 10, 'h1::align': 0, 'h2::align': 0, 'h3::align': 0, 'h4::align': 0, 'h5::align': 0, 'h6::align': 0, 'hr::align': 0, 'hr::noshade': 0, 'hr::size': 0, 'hr::width': 0, 'iframe::align': 0, 'iframe::frameborder': 0, 'iframe::height': 0, 'iframe::marginheight': 0, 'iframe::marginwidth': 0, 'iframe::width': 0, 'img::align': 0, 'img::alt': 0, 'img::border': 0, 'img::height': 0, 'img::hspace': 0, 'img::ismap': 0, 'img::name': 7, 'img::src': 1, 'img::usemap': 11, 'img::vspace': 0, 'img::width': 0, 'input::accept': 0, 'input::accesskey': 0, 'input::align': 0, 'input::alt': 0, 'input::autocomplete': 0, 'input::checked': 0, 'input::disabled': 0, 'input::inputmode': 0, 'input::ismap': 0, 'input::list': 5, 'input::max': 0, 'input::maxlength': 0, 'input::min': 0, 'input::multiple': 0, 'input::name': 8, 'input::onblur': 2, 'input::onchange': 2, 'input::onfocus': 2, 'input::onselect': 2, 'input::pattern': 0, 'input::placeholder': 0, 'input::readonly': 0, 'input::required': 0, 'input::size': 0, 'input::src': 1, 'input::step': 0, 'input::type': 0, 'input::usemap': 11, 'input::value': 0, 'ins::cite': 1, 'ins::datetime': 0, 'label::accesskey': 0, 'label::for': 5, 'label::onblur': 2, 'label::onfocus': 2, 'legend::accesskey': 0, 'legend::align': 0, 'li::type': 0, 'li::value': 0, 'map::name': 7, 'menu::compact': 0, 'menu::label': 0, 'menu::type': 0, 'meter::high': 0, 'meter::low': 0, 'meter::max': 0, 'meter::min': 0, 'meter::optimum': 0, 'meter::value': 0, 'ol::compact': 0, 'ol::reversed': 0, 'ol::start': 0, 'ol::type': 0, 'optgroup::disabled': 0, 'optgroup::label': 0, 'option::disabled': 0, 'option::label': 0, 'option::selected': 0, 'option::value': 0, 'output::for': 6, 'output::name': 8, 'p::align': 0, 'pre::width': 0, 'progress::max': 0, 'progress::min': 0, 'progress::value': 0, 'q::cite': 1, 'select::autocomplete': 0, 'select::disabled': 0, 'select::multiple': 0, 'select::name': 8, 'select::onblur': 2, 'select::onchange': 2, 'select::onfocus': 2, 'select::required': 0, 'select::size': 0, 'source::type': 0, 'table::align': 0, 'table::bgcolor': 0, 'table::border': 0, 'table::cellpadding': 0, 'table::cellspacing': 0, 'table::frame': 0, 'table::rules': 0, 'table::summary': 0, 'table::width': 0, 'tbody::align': 0, 'tbody::char': 0, 'tbody::charoff': 0, 'tbody::valign': 0, 'td::abbr': 0, 'td::align': 0, 'td::axis': 0, 'td::bgcolor': 0, 'td::char': 0, 'td::charoff': 0, 'td::colspan': 0, 'td::headers': 6, 'td::height': 0, 'td::nowrap': 0, 'td::rowspan': 0, 'td::scope': 0, 'td::valign': 0, 'td::width': 0, 'textarea::accesskey': 0, 'textarea::autocomplete': 0, 'textarea::cols': 0, 'textarea::disabled': 0, 'textarea::inputmode': 0, 'textarea::name': 8, 'textarea::onblur': 2, 'textarea::onchange': 2, 'textarea::onfocus': 2, 'textarea::onselect': 2, 'textarea::placeholder': 0, 'textarea::readonly': 0, 'textarea::required': 0, 'textarea::rows': 0, 'textarea::wrap': 0, 'tfoot::align': 0, 'tfoot::char': 0, 'tfoot::charoff': 0, 'tfoot::valign': 0, 'th::abbr': 0, 'th::align': 0, 'th::axis': 0, 'th::bgcolor': 0, 'th::char': 0, 'th::charoff': 0, 'th::colspan': 0, 'th::headers': 6, 'th::height': 0, 'th::nowrap': 0, 'th::rowspan': 0, 'th::scope': 0, 'th::valign': 0, 'th::width': 0, 'thead::align': 0, 'thead::char': 0, 'thead::charoff': 0, 'thead::valign': 0, 'tr::align': 0, 'tr::bgcolor': 0, 'tr::char': 0, 'tr::charoff': 0, 'tr::valign': 0, 'track::default': 0, 'track::kind': 0, 'track::label': 0, 'track::srclang': 0, 'ul::compact': 0, 'ul::type': 0, 'video::controls': 0, 'video::height': 0, 'video::loop': 0, 'video::mediagroup': 5, 'video::muted': 0, 'video::poster': 1, 'video::preload': 0, 'video::src': 1, 'video::width': 0 }; html4[ 'ATTRIBS' ] = html4.ATTRIBS; html4.eflags = { 'OPTIONAL_ENDTAG': 1, 'EMPTY': 2, 'CDATA': 4, 'RCDATA': 8, 'UNSAFE': 16, 'FOLDABLE': 32, 'SCRIPT': 64, 'STYLE': 128, 'VIRTUALIZED': 256 }; html4[ 'eflags' ] = html4.eflags; html4.ELEMENTS = { 'a': 0, 'abbr': 0, 'acronym': 0, 'address': 0, 'applet': 272, 'area': 2, 'article': 0, 'aside': 0, 'audio': 0, 'b': 0, 'base': 274, 'basefont': 274, 'bdi': 0, 'bdo': 0, 'big': 0, 'blockquote': 0, 'body': 305, 'br': 2, 'button': 0, 'canvas': 0, 'caption': 0, 'center': 0, 'cite': 0, 'code': 0, 'col': 2, 'colgroup': 1, 'command': 2, 'data': 0, 'datalist': 0, 'dd': 1, 'del': 0, 'details': 0, 'dfn': 0, 'dialog': 272, 'dir': 0, 'div': 0, 'dl': 0, 'dt': 1, 'em': 0, 'fieldset': 0, 'figcaption': 0, 'figure': 0, 'font': 0, 'footer': 0, 'form': 0, 'frame': 274, 'frameset': 272, 'h1': 0, 'h2': 0, 'h3': 0, 'h4': 0, 'h5': 0, 'h6': 0, 'head': 305, 'header': 0, 'hgroup': 0, 'hr': 2, 'html': 305, 'i': 0, 'iframe': 16, 'img': 2, 'input': 2, 'ins': 0, 'isindex': 274, 'kbd': 0, 'keygen': 274, 'label': 0, 'legend': 0, 'li': 1, 'link': 274, 'map': 0, 'mark': 0, 'menu': 0, 'meta': 274, 'meter': 0, 'nav': 0, 'nobr': 0, 'noembed': 276, 'noframes': 276, 'noscript': 276, 'object': 272, 'ol': 0, 'optgroup': 0, 'option': 1, 'output': 0, 'p': 1, 'param': 274, 'pre': 0, 'progress': 0, 'q': 0, 's': 0, 'samp': 0, 'script': 84, 'section': 0, 'select': 0, 'small': 0, 'source': 2, 'span': 0, 'strike': 0, 'strong': 0, 'style': 148, 'sub': 0, 'summary': 0, 'sup': 0, 'table': 0, 'tbody': 1, 'td': 1, 'textarea': 8, 'tfoot': 1, 'th': 1, 'thead': 1, 'time': 0, 'title': 280, 'tr': 1, 'track': 2, 'tt': 0, 'u': 0, 'ul': 0, 'var': 0, 'video': 0, 'wbr': 2 }; html4[ 'ELEMENTS' ] = html4.ELEMENTS; html4.ELEMENT_DOM_INTERFACES = { 'a': 'HTMLAnchorElement', 'abbr': 'HTMLElement', 'acronym': 'HTMLElement', 'address': 'HTMLElement', 'applet': 'HTMLAppletElement', 'area': 'HTMLAreaElement', 'article': 'HTMLElement', 'aside': 'HTMLElement', 'audio': 'HTMLAudioElement', 'b': 'HTMLElement', 'base': 'HTMLBaseElement', 'basefont': 'HTMLBaseFontElement', 'bdi': 'HTMLElement', 'bdo': 'HTMLElement', 'big': 'HTMLElement', 'blockquote': 'HTMLQuoteElement', 'body': 'HTMLBodyElement', 'br': 'HTMLBRElement', 'button': 'HTMLButtonElement', 'canvas': 'HTMLCanvasElement', 'caption': 'HTMLTableCaptionElement', 'center': 'HTMLElement', 'cite': 'HTMLElement', 'code': 'HTMLElement', 'col': 'HTMLTableColElement', 'colgroup': 'HTMLTableColElement', 'command': 'HTMLCommandElement', 'data': 'HTMLElement', 'datalist': 'HTMLDataListElement', 'dd': 'HTMLElement', 'del': 'HTMLModElement', 'details': 'HTMLDetailsElement', 'dfn': 'HTMLElement', 'dialog': 'HTMLDialogElement', 'dir': 'HTMLDirectoryElement', 'div': 'HTMLDivElement', 'dl': 'HTMLDListElement', 'dt': 'HTMLElement', 'em': 'HTMLElement', 'fieldset': 'HTMLFieldSetElement', 'figcaption': 'HTMLElement', 'figure': 'HTMLElement', 'font': 'HTMLFontElement', 'footer': 'HTMLElement', 'form': 'HTMLFormElement', 'frame': 'HTMLFrameElement', 'frameset': 'HTMLFrameSetElement', 'h1': 'HTMLHeadingElement', 'h2': 'HTMLHeadingElement', 'h3': 'HTMLHeadingElement', 'h4': 'HTMLHeadingElement', 'h5': 'HTMLHeadingElement', 'h6': 'HTMLHeadingElement', 'head': 'HTMLHeadElement', 'header': 'HTMLElement', 'hgroup': 'HTMLElement', 'hr': 'HTMLHRElement', 'html': 'HTMLHtmlElement', 'i': 'HTMLElement', 'iframe': 'HTMLIFrameElement', 'img': 'HTMLImageElement', 'input': 'HTMLInputElement', 'ins': 'HTMLModElement', 'isindex': 'HTMLUnknownElement', 'kbd': 'HTMLElement', 'keygen': 'HTMLKeygenElement', 'label': 'HTMLLabelElement', 'legend': 'HTMLLegendElement', 'li': 'HTMLLIElement', 'link': 'HTMLLinkElement', 'map': 'HTMLMapElement', 'mark': 'HTMLElement', 'menu': 'HTMLMenuElement', 'meta': 'HTMLMetaElement', 'meter': 'HTMLMeterElement', 'nav': 'HTMLElement', 'nobr': 'HTMLElement', 'noembed': 'HTMLElement', 'noframes': 'HTMLElement', 'noscript': 'HTMLElement', 'object': 'HTMLObjectElement', 'ol': 'HTMLOListElement', 'optgroup': 'HTMLOptGroupElement', 'option': 'HTMLOptionElement', 'output': 'HTMLOutputElement', 'p': 'HTMLParagraphElement', 'param': 'HTMLParamElement', 'pre': 'HTMLPreElement', 'progress': 'HTMLProgressElement', 'q': 'HTMLQuoteElement', 's': 'HTMLElement', 'samp': 'HTMLElement', 'script': 'HTMLScriptElement', 'section': 'HTMLElement', 'select': 'HTMLSelectElement', 'small': 'HTMLElement', 'source': 'HTMLSourceElement', 'span': 'HTMLSpanElement', 'strike': 'HTMLElement', 'strong': 'HTMLElement', 'style': 'HTMLStyleElement', 'sub': 'HTMLElement', 'summary': 'HTMLElement', 'sup': 'HTMLElement', 'table': 'HTMLTableElement', 'tbody': 'HTMLTableSectionElement', 'td': 'HTMLTableDataCellElement', 'textarea': 'HTMLTextAreaElement', 'tfoot': 'HTMLTableSectionElement', 'th': 'HTMLTableHeaderCellElement', 'thead': 'HTMLTableSectionElement', 'time': 'HTMLTimeElement', 'title': 'HTMLTitleElement', 'tr': 'HTMLTableRowElement', 'track': 'HTMLTrackElement', 'tt': 'HTMLElement', 'u': 'HTMLElement', 'ul': 'HTMLUListElement', 'var': 'HTMLElement', 'video': 'HTMLVideoElement', 'wbr': 'HTMLElement' }; html4[ 'ELEMENT_DOM_INTERFACES' ] = html4.ELEMENT_DOM_INTERFACES; html4.ueffects = { 'NOT_LOADED': 0, 'SAME_DOCUMENT': 1, 'NEW_DOCUMENT': 2 }; html4[ 'ueffects' ] = html4.ueffects; html4.URIEFFECTS = { 'a::href': 2, 'area::href': 2, 'audio::src': 1, 'blockquote::cite': 0, 'command::icon': 1, 'del::cite': 0, 'form::action': 2, 'img::src': 1, 'input::src': 1, 'ins::cite': 0, 'q::cite': 0, 'video::poster': 1, 'video::src': 1 }; html4[ 'URIEFFECTS' ] = html4.URIEFFECTS; html4.ltypes = { 'UNSANDBOXED': 2, 'SANDBOXED': 1, 'DATA': 0 }; html4[ 'ltypes' ] = html4.ltypes; html4.LOADERTYPES = { 'a::href': 2, 'area::href': 2, 'audio::src': 2, 'blockquote::cite': 2, 'command::icon': 1, 'del::cite': 2, 'form::action': 2, 'img::src': 1, 'input::src': 1, 'ins::cite': 2, 'q::cite': 2, 'video::poster': 1, 'video::src': 2 }; html4[ 'LOADERTYPES' ] = html4.LOADERTYPES; // export for Closure Compiler if (typeof window !== 'undefined') { window['html4'] = html4; } ; // Copyright (C) 2006 Google Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. /** * @fileoverview * An HTML sanitizer that can satisfy a variety of security policies. * *

* The HTML sanitizer is built around a SAX parser and HTML element and * attributes schemas. * * If the cssparser is loaded, inline styles are sanitized using the * css property and value schemas. Else they are remove during * sanitization. * * If it exists, uses parseCssDeclarations, sanitizeCssProperty, cssSchema * * @author mikesamuel@gmail.com * @author jasvir@gmail.com * \@requires html4, URI * \@overrides window * \@provides html, html_sanitize */ // The Turkish i seems to be a non-issue, but abort in case it is. if ('I'.toLowerCase() !== 'i') { throw 'I/i problem'; } /** * \@namespace */ var html = (function(html4) { // For closure compiler var parseCssDeclarations, sanitizeCssProperty, cssSchema; if ('undefined' !== typeof window) { parseCssDeclarations = window['parseCssDeclarations']; sanitizeCssProperty = window['sanitizeCssProperty']; cssSchema = window['cssSchema']; } // The keys of this object must be 'quoted' or JSCompiler will mangle them! // This is a partial list -- lookupEntity() uses the host browser's parser // (when available) to implement full entity lookup. // Note that entities are in general case-sensitive; the uppercase ones are // explicitly defined by HTML5 (presumably as compatibility). var ENTITIES = { 'lt': '<', 'LT': '<', 'gt': '>', 'GT': '>', 'amp': '&', 'AMP': '&', 'quot': '"', 'apos': '\'', 'nbsp': '\u00A0' }; // Patterns for types of entity/character reference names. var decimalEscapeRe = /^#(\d+)$/; var hexEscapeRe = /^#x([0-9A-Fa-f]+)$/; // contains every entity per http://www.w3.org/TR/2011/WD-html5-20110113/named-character-references.html var safeEntityNameRe = /^[A-Za-z][A-za-z0-9]+$/; // Used as a hook to invoke the browser's entity parsing.