Update third_party/document_image_extractor

third_party/document_image_extractor/third_party/closure-library/closure/goog/html/safeurl.js

Index: third_party/document_image_extractor/third_party/closure-library/closure/goog/html/safeurl.js
diff --git a/third_party/document_image_extractor/third_party/closure-library/closure/goog/html/safeurl.js b/third_party/document_image_extractor/third_party/closure-library/closure/goog/html/safeurl.js
deleted file mode 100644
index 6d2f871987f053946ab4588982d185062d9520fb..0000000000000000000000000000000000000000
--- a/third_party/document_image_extractor/third_party/closure-library/closure/goog/html/safeurl.js
+++ /dev/null
@@ -1,431 +0,0 @@
-// Copyright 2013 The Closure Library Authors. All Rights Reserved.
-//
-// 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 The SafeUrl type and its builders.
- *
- * TODO(user): Link to document stating type contract.
- */
-
-goog.provide('goog.html.SafeUrl');
-
-goog.require('goog.asserts');
-goog.require('goog.fs.url');
-goog.require('goog.i18n.bidi.Dir');
-goog.require('goog.i18n.bidi.DirectionalString');
-goog.require('goog.string.Const');
-goog.require('goog.string.TypedString');
-
-
-
-/**
- * A string that is safe to use in URL context in DOM APIs and HTML documents.
- *
- * A SafeUrl is a string-like object that carries the security type contract
- * that its value as a string will not cause untrusted script execution
- * when evaluated as a hyperlink URL in a browser.
- *
- * Values of this type are guaranteed to be safe to use in URL/hyperlink
- * contexts, such as, assignment to URL-valued DOM properties, or
- * interpolation into a HTML template in URL context (e.g., inside a href
- * attribute), in the sense that the use will not result in a
- * Cross-Site-Scripting vulnerability.
- *
- * Note that, as documented in {@code goog.html.SafeUrl.unwrap}, this type's
- * contract does not guarantee that instances are safe to interpolate into HTML
- * without appropriate escaping.
- *
- * Note also that this type's contract does not imply any guarantees regarding
- * the resource the URL refers to.  In particular, SafeUrls are <b>not</b>
- * safe to use in a context where the referred-to resource is interpreted as
- * trusted code, e.g., as the src of a script tag.
- *
- * Instances of this type must be created via the factory methods
- * ({@code goog.html.SafeUrl.fromConstant}, {@code goog.html.SafeUrl.sanitize}),
- * etc and not by invoking its constructor.  The constructor intentionally
- * takes no parameters and the type is immutable; hence only a default instance
- * corresponding to the empty string can be obtained via constructor invocation.
- *
- * @see goog.html.SafeUrl#fromConstant
- * @see goog.html.SafeUrl#from
- * @see goog.html.SafeUrl#sanitize
- * @constructor
- * @final
- * @struct
- * @implements {goog.i18n.bidi.DirectionalString}
- * @implements {goog.string.TypedString}
- */
-goog.html.SafeUrl = function() {
-  /**
-   * The contained value of this SafeUrl.  The field has a purposely ugly
-   * name to make (non-compiled) code that attempts to directly access this
-   * field stand out.
-   * @private {string}
-   */
-  this.privateDoNotAccessOrElseSafeHtmlWrappedValue_ = '';
-
-  /**
-   * A type marker used to implement additional run-time type checking.
-   * @see goog.html.SafeUrl#unwrap
-   * @const
-   * @private
-   */
-  this.SAFE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ =
-      goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_;
-};
-
-
-/**
- * The innocuous string generated by goog.html.SafeUrl.sanitize when passed
- * an unsafe URL.
- *
- * about:invalid is registered in
- * http://www.w3.org/TR/css3-values/#about-invalid.
- * http://tools.ietf.org/html/rfc6694#section-2.2.1 permits about URLs to
- * contain a fragment, which is not to be considered when determining if an
- * about URL is well-known.
- *
- * Using about:invalid seems preferable to using a fixed data URL, since
- * browsers might choose to not report CSP violations on it, as legitimate
- * CSS function calls to attr() can result in this URL being produced. It is
- * also a standard URL which matches exactly the semantics we need:
- * "The about:invalid URI references a non-existent document with a generic
- * error condition. It can be used when a URI is necessary, but the default
- * value shouldn't be resolveable as any type of document".
- *
- * @const {string}
- */
-goog.html.SafeUrl.INNOCUOUS_STRING = 'about:invalid#zClosurez';
-
-
-/**
- * @override
- * @const
- */
-goog.html.SafeUrl.prototype.implementsGoogStringTypedString = true;
-
-
-/**
- * Returns this SafeUrl's value a string.
- *
- * IMPORTANT: In code where it is security relevant that an object's type is
- * indeed {@code SafeUrl}, use {@code goog.html.SafeUrl.unwrap} instead of this
- * method. If in doubt, assume that it's security relevant. In particular, note
- * that goog.html functions which return a goog.html type do not guarantee that
- * the returned instance is of the right type. For example:
- *
- * <pre>
- * var fakeSafeHtml = new String('fake');
- * fakeSafeHtml.__proto__ = goog.html.SafeHtml.prototype;
- * var newSafeHtml = goog.html.SafeHtml.htmlEscape(fakeSafeHtml);
- * // newSafeHtml is just an alias for fakeSafeHtml, it's passed through by
- * // goog.html.SafeHtml.htmlEscape() as fakeSafeHtml instanceof
- * // goog.html.SafeHtml.
- * </pre>
- *
- * IMPORTANT: The guarantees of the SafeUrl type contract only extend to the
- * behavior of browsers when interpreting URLs. Values of SafeUrl objects MUST
- * be appropriately escaped before embedding in a HTML document. Note that the
- * required escaping is context-sensitive (e.g. a different escaping is
- * required for embedding a URL in a style property within a style
- * attribute, as opposed to embedding in a href attribute).
- *
- * @see goog.html.SafeUrl#unwrap
- * @override
- */
-goog.html.SafeUrl.prototype.getTypedStringValue = function() {
-  return this.privateDoNotAccessOrElseSafeHtmlWrappedValue_;
-};
-
-
-/**
- * @override
- * @const
- */
-goog.html.SafeUrl.prototype.implementsGoogI18nBidiDirectionalString = true;
-
-
-/**
- * Returns this URLs directionality, which is always {@code LTR}.
- * @override
- */
-goog.html.SafeUrl.prototype.getDirection = function() {
-  return goog.i18n.bidi.Dir.LTR;
-};
-
-
-if (goog.DEBUG) {
-  /**
-   * Returns a debug string-representation of this value.
-   *
-   * To obtain the actual string value wrapped in a SafeUrl, use
-   * {@code goog.html.SafeUrl.unwrap}.
-   *
-   * @see goog.html.SafeUrl#unwrap
-   * @override
-   */
-  goog.html.SafeUrl.prototype.toString = function() {
-    return 'SafeUrl{' + this.privateDoNotAccessOrElseSafeHtmlWrappedValue_ +
-        '}';
-  };
-}
-
-
-/**
- * Performs a runtime check that the provided object is indeed a SafeUrl
- * object, and returns its value.
- *
- * IMPORTANT: The guarantees of the SafeUrl type contract only extend to the
- * behavior of  browsers when interpreting URLs. Values of SafeUrl objects MUST
- * be appropriately escaped before embedding in a HTML document. Note that the
- * required escaping is context-sensitive (e.g. a different escaping is
- * required for embedding a URL in a style property within a style
- * attribute, as opposed to embedding in a href attribute).
- *
- * Note that the returned value does not necessarily correspond to the string
- * with which the SafeUrl was constructed, since goog.html.SafeUrl.sanitize
- * will percent-encode many characters.
- *
- * @param {!goog.html.SafeUrl} safeUrl The object to extract from.
- * @return {string} The SafeUrl object's contained string, unless the run-time
- *     type check fails. In that case, {@code unwrap} returns an innocuous
- *     string, or, if assertions are enabled, throws
- *     {@code goog.asserts.AssertionError}.
- */
-goog.html.SafeUrl.unwrap = function(safeUrl) {
-  // Perform additional Run-time type-checking to ensure that safeUrl is indeed
-  // an instance of the expected type.  This provides some additional protection
-  // against security bugs due to application code that disables type checks.
-  // Specifically, the following checks are performed:
-  // 1. The object is an instance of the expected type.
-  // 2. The object is not an instance of a subclass.
-  // 3. The object carries a type marker for the expected type. "Faking" an
-  // object requires a reference to the type marker, which has names intended
-  // to stand out in code reviews.
-  if (safeUrl instanceof goog.html.SafeUrl &&
-      safeUrl.constructor === goog.html.SafeUrl &&
-      safeUrl.SAFE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ ===
-          goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_) {
-    return safeUrl.privateDoNotAccessOrElseSafeHtmlWrappedValue_;
-  } else {
-    goog.asserts.fail('expected object of type SafeUrl, got \'' +
-                      safeUrl + '\'');
-    return 'type_error:SafeUrl';
-
-  }
-};
-
-
-/**
- * Creates a SafeUrl object from a compile-time constant string.
- *
- * Compile-time constant strings are inherently program-controlled and hence
- * trusted.
- *
- * @param {!goog.string.Const} url A compile-time-constant string from which to
- *         create a SafeUrl.
- * @return {!goog.html.SafeUrl} A SafeUrl object initialized to {@code url}.
- */
-goog.html.SafeUrl.fromConstant = function(url) {
-  return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(
-      goog.string.Const.unwrap(url));
-};
-
-
-/**
- * A pattern that matches Blob types that can have SafeUrls created from
- * URL.createObjectURL(blob). Only matches image types, currently.
- * @const
- * @private
- */
-goog.html.SAFE_BLOB_TYPE_PATTERN_ =
-    /^image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)$/i;
-
-
-/**
- * Creates a SafeUrl wrapping a blob URL for the given {@code blob}. The
- * blob URL is created with {@code URL.createObjectURL}. If the MIME type
- * for {@code blob} is not of a known safe image MIME type, then the
- * SafeUrl will wrap {@link #INNOCUOUS_STRING}.
- * @see http://www.w3.org/TR/FileAPI/#url
- * @param {!Blob} blob
- * @return {!goog.html.SafeUrl} The blob URL, or an innocuous string wrapped
- *   as a SafeUrl.
- */
-goog.html.SafeUrl.fromBlob = function(blob) {
-  var url = goog.html.SAFE_BLOB_TYPE_PATTERN_.test(blob.type) ?
-      goog.fs.url.createObjectUrl(blob) : goog.html.SafeUrl.INNOCUOUS_STRING;
-  return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(url);
-};
-
-
-/**
- * A pattern that recognizes a commonly useful subset of URLs that satisfy
- * the SafeUrl contract.
- *
- * This regular expression matches a subset of URLs that will not cause script
- * execution if used in URL context within a HTML document. Specifically, this
- * regular expression matches if (comment from here on and regex copied from
- * Soy's EscapingConventions):
- * (1) Either a protocol in a whitelist (http, https, mailto or ftp).
- * (2) or no protocol.  A protocol must be followed by a colon. The below
- *     allows that by allowing colons only after one of the characters [/?#].
- *     A colon after a hash (#) must be in the fragment.
- *     Otherwise, a colon after a (?) must be in a query.
- *     Otherwise, a colon after a single solidus (/) must be in a path.
- *     Otherwise, a colon after a double solidus (//) must be in the authority
- *     (before port).
- *
- * The pattern disallows &, used in HTML entity declarations before
- * one of the characters in [/?#]. This disallows HTML entities used in the
- * protocol name, which should never happen, e.g. "h&#116;tp" for "http".
- * It also disallows HTML entities in the first path part of a relative path,
- * e.g. "foo&lt;bar/baz".  Our existing escaping functions should not produce
- * that. More importantly, it disallows masking of a colon,
- * e.g. "javascript&#58;...".
- *
- * @private
- * @const {!RegExp}
- */
-goog.html.SAFE_URL_PATTERN_ =
-    /^(?:(?:https?|mailto|ftp):|[^&:/?#]*(?:[/?#]|$))/i;
-
-
-/**
- * Creates a SafeUrl object from {@code url}. If {@code url} is a
- * goog.html.SafeUrl then it is simply returned. Otherwise the input string is
- * validated to match a pattern of commonly used safe URLs. The string is
- * converted to UTF-8 and non-whitelisted characters are percent-encoded. The
- * string wrapped by the created SafeUrl will thus contain only ASCII printable
- * characters.
- *
- * {@code url} may be a URL with the http, https, mailto or ftp scheme,
- * or a relative URL (i.e., a URL without a scheme; specifically, a
- * scheme-relative, absolute-path-relative, or path-relative URL).
- *
- * {@code url} is converted to UTF-8 and non-whitelisted characters are
- * percent-encoded. Whitelisted characters are '%' and, from RFC 3986,
- * unreserved characters and reserved characters, with the exception of '\'',
- * '(' and ')'. This ensures the the SafeUrl contains only ASCII-printable
- * characters and reduces the chance of security bugs were it to be
- * interpolated into a specific context without the necessary escaping.
- *
- * If {@code url} fails validation or does not UTF-16 decode correctly
- * (JavaScript strings are UTF-16 encoded), this function returns a SafeUrl
- * object containing an innocuous string, goog.html.SafeUrl.INNOCUOUS_STRING.
- *
- * @see http://url.spec.whatwg.org/#concept-relative-url
- * @param {string|!goog.string.TypedString} url The URL to validate.
- * @return {!goog.html.SafeUrl} The validated URL, wrapped as a SafeUrl.
- */
-goog.html.SafeUrl.sanitize = function(url) {
-  if (url instanceof goog.html.SafeUrl) {
-    return url;
-  }
-  else if (url.implementsGoogStringTypedString) {
-    url = url.getTypedStringValue();
-  } else {
-    url = String(url);
-  }
-  if (!goog.html.SAFE_URL_PATTERN_.test(url)) {
-    url = goog.html.SafeUrl.INNOCUOUS_STRING;
-  } else {
-    url = goog.html.SafeUrl.normalize_(url);
-  }
-  return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(url);
-};
-
-
-/**
- * Normalizes {@code url} the UTF-8 encoding of url, using a whitelist of
- * characters. Whitelisted characters are not percent-encoded.
- * @param {string} url The URL to normalize.
- * @return {string} The normalized URL.
- * @private
- */
-goog.html.SafeUrl.normalize_ = function(url) {
-  try {
-    var normalized = encodeURI(url);
-  } catch (e) {  // Happens if url contains invalid surrogate sequences.
-    return goog.html.SafeUrl.INNOCUOUS_STRING;
-  }
-
-  return normalized.replace(
-      goog.html.SafeUrl.NORMALIZE_MATCHER_,
-      function(match) {
-        return goog.html.SafeUrl.NORMALIZE_REPLACER_MAP_[match];
-      });
-};
-
-
-/**
- * Matches characters and strings which need to be replaced in the string
- * generated by encodeURI. Specifically:
- *
- * - '\'', '(' and ')' are not encoded. They are part of the reserved
- *   characters group in RFC 3986 but only appear in the obsolete mark
- *   production in Appendix D.2 of RFC 3986, so they can be encoded without
- *   changing semantics.
- * - '[' and ']' are encoded by encodeURI, despite being reserved characters
- *   which can be used to represent IPv6 addresses. So they need to be decoded.
- * - '%' is encoded by encodeURI. However, encoding '%' characters that are
- *   already part of a valid percent-encoded sequence changes the semantics of a
- *   URL, and hence we need to preserve them. Note that this may allow
- *   non-encoded '%' characters to remain in the URL (i.e., occurrences of '%'
- *   that are not part of a valid percent-encoded sequence, for example,
- *   'ab%xy').
- *
- * @const {!RegExp}
- * @private
- */
-goog.html.SafeUrl.NORMALIZE_MATCHER_ = /[()']|%5B|%5D|%25/g;
-
-
-/**
- * Map of replacements to be done in string generated by encodeURI.
- * @const {!Object<string, string>}
- * @private
- */
-goog.html.SafeUrl.NORMALIZE_REPLACER_MAP_ = {
-  '\'': '%27',
-  '(': '%28',
-  ')': '%29',
-  '%5B': '[',
-  '%5D': ']',
-  '%25': '%'
-};
-
-
-/**
- * Type marker for the SafeUrl type, used to implement additional run-time
- * type checking.
- * @const
- * @private
- */
-goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ = {};
-
-
-/**
- * Package-internal utility method to create SafeUrl instances.
- *
- * @param {string} url The string to initialize the SafeUrl object with.
- * @return {!goog.html.SafeUrl} The initialized SafeUrl object.
- * @package
- */
-goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse = function(
-    url) {
-  var safeUrl = new goog.html.SafeUrl();
-  safeUrl.privateDoNotAccessOrElseSafeHtmlWrappedValue_ = url;
-  return safeUrl;
-};