build the blog with nix

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diff --git a/src/assets/viz/2/goog/string/const.js b/src/assets/viz/2/goog/string/const.js
new file mode 100644
index 0000000..30bfc4e
--- /dev/null
+++ b/src/assets/viz/2/goog/string/const.js
@@ -0,0 +1,186 @@
+// 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.
+
+goog.provide('goog.string.Const');
+
+goog.require('goog.asserts');
+goog.require('goog.string.TypedString');
+
+
+
+/**
+ * Wrapper for compile-time-constant strings.
+ *
+ * Const is a wrapper for strings that can only be created from program
+ * constants (i.e., string literals).  This property relies on a custom Closure
+ * compiler check that {@code goog.string.Const.from} is only invoked on
+ * compile-time-constant expressions.
+ *
+ * Const is useful in APIs whose correct and secure use requires that certain
+ * arguments are not attacker controlled: Compile-time constants are inherently
+ * under the control of the application and not under control of external
+ * attackers, and hence are safe to use in such contexts.
+ *
+ * Instances of this type must be created via its factory method
+ * {@code goog.string.Const.from} 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.string.Const#from
+ * @constructor
+ * @final
+ * @struct
+ * @implements {goog.string.TypedString}
+ */
+goog.string.Const = function() {
+  /**
+   * The wrapped value of this Const object.  The field has a purposely ugly
+   * name to make (non-compiled) code that attempts to directly access this
+   * field stand out.
+   * @private {string}
+   */
+  this.stringConstValueWithSecurityContract__googStringSecurityPrivate_ = '';
+
+  /**
+   * A type marker used to implement additional run-time type checking.
+   * @see goog.string.Const#unwrap
+   * @const {!Object}
+   * @private
+   */
+  this.STRING_CONST_TYPE_MARKER__GOOG_STRING_SECURITY_PRIVATE_ =
+      goog.string.Const.TYPE_MARKER_;
+};
+
+
+/**
+ * @override
+ * @const
+ */
+goog.string.Const.prototype.implementsGoogStringTypedString = true;
+
+
+/**
+ * Returns this Const's value a string.
+ *
+ * IMPORTANT: In code where it is security-relevant that an object's type is
+ * indeed {@code goog.string.Const}, use {@code goog.string.Const.unwrap}
+ * instead of this method.
+ *
+ * @see goog.string.Const#unwrap
+ * @override
+ */
+goog.string.Const.prototype.getTypedStringValue = function() {
+  return this.stringConstValueWithSecurityContract__googStringSecurityPrivate_;
+};
+
+
+/**
+ * Returns a debug-string representation of this value.
+ *
+ * To obtain the actual string value wrapped inside an object of this type,
+ * use {@code goog.string.Const.unwrap}.
+ *
+ * @see goog.string.Const#unwrap
+ * @override
+ */
+goog.string.Const.prototype.toString = function() {
+  return 'Const{' +
+      this.stringConstValueWithSecurityContract__googStringSecurityPrivate_ +
+      '}';
+};
+
+
+/**
+ * Performs a runtime check that the provided object is indeed an instance
+ * of {@code goog.string.Const}, and returns its value.
+ * @param {!goog.string.Const} stringConst The object to extract from.
+ * @return {string} The Const 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.string.Const.unwrap = function(stringConst) {
+  // Perform additional run-time type-checking to ensure that stringConst is
+  // indeed an instance of the expected type.  This provides some additional
+  // protection against security bugs due to application code that disables type
+  // checks.
+  if (stringConst instanceof goog.string.Const &&
+      stringConst.constructor === goog.string.Const &&
+      stringConst.STRING_CONST_TYPE_MARKER__GOOG_STRING_SECURITY_PRIVATE_ ===
+          goog.string.Const.TYPE_MARKER_) {
+    return stringConst
+        .stringConstValueWithSecurityContract__googStringSecurityPrivate_;
+  } else {
+    goog.asserts.fail(
+        'expected object of type Const, got \'' + stringConst + '\'');
+    return 'type_error:Const';
+  }
+};
+
+
+/**
+ * Creates a Const object from a compile-time constant string.
+ *
+ * It is illegal to invoke this function on an expression whose
+ * compile-time-contant value cannot be determined by the Closure compiler.
+ *
+ * Correct invocations include,
+ * <pre>
+ *   var s = goog.string.Const.from('hello');
+ *   var t = goog.string.Const.from('hello' + 'world');
+ * </pre>
+ *
+ * In contrast, the following are illegal:
+ * <pre>
+ *   var s = goog.string.Const.from(getHello());
+ *   var t = goog.string.Const.from('hello' + world);
+ * </pre>
+ *
+ * @param {string} s A constant string from which to create a Const.
+ * @return {!goog.string.Const} A Const object initialized to stringConst.
+ */
+goog.string.Const.from = function(s) {
+  return goog.string.Const.create__googStringSecurityPrivate_(s);
+};
+
+
+/**
+ * Type marker for the Const type, used to implement additional run-time
+ * type checking.
+ * @const {!Object}
+ * @private
+ */
+goog.string.Const.TYPE_MARKER_ = {};
+
+
+/**
+ * Utility method to create Const instances.
+ * @param {string} s The string to initialize the Const object with.
+ * @return {!goog.string.Const} The initialized Const object.
+ * @private
+ */
+goog.string.Const.create__googStringSecurityPrivate_ = function(s) {
+  var stringConst = new goog.string.Const();
+  stringConst.stringConstValueWithSecurityContract__googStringSecurityPrivate_ =
+      s;
+  return stringConst;
+};
+
+
+/**
+ * A Const instance wrapping the empty string.
+ * @const {!goog.string.Const}
+ */
+goog.string.Const.EMPTY = goog.string.Const.from('');
diff --git a/src/assets/viz/2/goog/string/string.js b/src/assets/viz/2/goog/string/string.js
new file mode 100644
index 0000000..7a10ae0
--- /dev/null
+++ b/src/assets/viz/2/goog/string/string.js
@@ -0,0 +1,1641 @@
+// Copyright 2006 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 Utilities for string manipulation.
+ * @author arv@google.com (Erik Arvidsson)
+ */
+
+
+/**
+ * Namespace for string utilities
+ */
+goog.provide('goog.string');
+goog.provide('goog.string.Unicode');
+
+
+/**
+ * @define {boolean} Enables HTML escaping of lowercase letter "e" which helps
+ * with detection of double-escaping as this letter is frequently used.
+ */
+goog.define('goog.string.DETECT_DOUBLE_ESCAPING', false);
+
+
+/**
+ * @define {boolean} Whether to force non-dom html unescaping.
+ */
+goog.define('goog.string.FORCE_NON_DOM_HTML_UNESCAPING', false);
+
+
+/**
+ * Common Unicode string characters.
+ * @enum {string}
+ */
+goog.string.Unicode = {
+  NBSP: '\xa0'
+};
+
+
+/**
+ * Fast prefix-checker.
+ * @param {string} str The string to check.
+ * @param {string} prefix A string to look for at the start of {@code str}.
+ * @return {boolean} True if {@code str} begins with {@code prefix}.
+ */
+goog.string.startsWith = function(str, prefix) {
+  return str.lastIndexOf(prefix, 0) == 0;
+};
+
+
+/**
+ * Fast suffix-checker.
+ * @param {string} str The string to check.
+ * @param {string} suffix A string to look for at the end of {@code str}.
+ * @return {boolean} True if {@code str} ends with {@code suffix}.
+ */
+goog.string.endsWith = function(str, suffix) {
+  var l = str.length - suffix.length;
+  return l >= 0 && str.indexOf(suffix, l) == l;
+};
+
+
+/**
+ * Case-insensitive prefix-checker.
+ * @param {string} str The string to check.
+ * @param {string} prefix  A string to look for at the end of {@code str}.
+ * @return {boolean} True if {@code str} begins with {@code prefix} (ignoring
+ *     case).
+ */
+goog.string.caseInsensitiveStartsWith = function(str, prefix) {
+  return goog.string.caseInsensitiveCompare(
+             prefix, str.substr(0, prefix.length)) == 0;
+};
+
+
+/**
+ * Case-insensitive suffix-checker.
+ * @param {string} str The string to check.
+ * @param {string} suffix A string to look for at the end of {@code str}.
+ * @return {boolean} True if {@code str} ends with {@code suffix} (ignoring
+ *     case).
+ */
+goog.string.caseInsensitiveEndsWith = function(str, suffix) {
+  return (
+      goog.string.caseInsensitiveCompare(
+          suffix, str.substr(str.length - suffix.length, suffix.length)) == 0);
+};
+
+
+/**
+ * Case-insensitive equality checker.
+ * @param {string} str1 First string to check.
+ * @param {string} str2 Second string to check.
+ * @return {boolean} True if {@code str1} and {@code str2} are the same string,
+ *     ignoring case.
+ */
+goog.string.caseInsensitiveEquals = function(str1, str2) {
+  return str1.toLowerCase() == str2.toLowerCase();
+};
+
+
+/**
+ * Does simple python-style string substitution.
+ * subs("foo%s hot%s", "bar", "dog") becomes "foobar hotdog".
+ * @param {string} str The string containing the pattern.
+ * @param {...*} var_args The items to substitute into the pattern.
+ * @return {string} A copy of {@code str} in which each occurrence of
+ *     {@code %s} has been replaced an argument from {@code var_args}.
+ */
+goog.string.subs = function(str, var_args) {
+  var splitParts = str.split('%s');
+  var returnString = '';
+
+  var subsArguments = Array.prototype.slice.call(arguments, 1);
+  while (subsArguments.length &&
+         // Replace up to the last split part. We are inserting in the
+         // positions between split parts.
+         splitParts.length > 1) {
+    returnString += splitParts.shift() + subsArguments.shift();
+  }
+
+  return returnString + splitParts.join('%s');  // Join unused '%s'
+};
+
+
+/**
+ * Converts multiple whitespace chars (spaces, non-breaking-spaces, new lines
+ * and tabs) to a single space, and strips leading and trailing whitespace.
+ * @param {string} str Input string.
+ * @return {string} A copy of {@code str} with collapsed whitespace.
+ */
+goog.string.collapseWhitespace = function(str) {
+  // Since IE doesn't include non-breaking-space (0xa0) in their \s character
+  // class (as required by section 7.2 of the ECMAScript spec), we explicitly
+  // include it in the regexp to enforce consistent cross-browser behavior.
+  return str.replace(/[\s\xa0]+/g, ' ').replace(/^\s+|\s+$/g, '');
+};
+
+
+/**
+ * Checks if a string is empty or contains only whitespaces.
+ * @param {string} str The string to check.
+ * @return {boolean} Whether {@code str} is empty or whitespace only.
+ */
+goog.string.isEmptyOrWhitespace = function(str) {
+  // testing length == 0 first is actually slower in all browsers (about the
+  // same in Opera).
+  // Since IE doesn't include non-breaking-space (0xa0) in their \s character
+  // class (as required by section 7.2 of the ECMAScript spec), we explicitly
+  // include it in the regexp to enforce consistent cross-browser behavior.
+  return /^[\s\xa0]*$/.test(str);
+};
+
+
+/**
+ * Checks if a string is empty.
+ * @param {string} str The string to check.
+ * @return {boolean} Whether {@code str} is empty.
+ */
+goog.string.isEmptyString = function(str) {
+  return str.length == 0;
+};
+
+
+/**
+ * Checks if a string is empty or contains only whitespaces.
+ *
+ * @param {string} str The string to check.
+ * @return {boolean} Whether {@code str} is empty or whitespace only.
+ * @deprecated Use goog.string.isEmptyOrWhitespace instead.
+ */
+goog.string.isEmpty = goog.string.isEmptyOrWhitespace;
+
+
+/**
+ * Checks if a string is null, undefined, empty or contains only whitespaces.
+ * @param {*} str The string to check.
+ * @return {boolean} Whether {@code str} is null, undefined, empty, or
+ *     whitespace only.
+ * @deprecated Use goog.string.isEmptyOrWhitespace(goog.string.makeSafe(str))
+ *     instead.
+ */
+goog.string.isEmptyOrWhitespaceSafe = function(str) {
+  return goog.string.isEmptyOrWhitespace(goog.string.makeSafe(str));
+};
+
+
+/**
+ * Checks if a string is null, undefined, empty or contains only whitespaces.
+ *
+ * @param {*} str The string to check.
+ * @return {boolean} Whether {@code str} is null, undefined, empty, or
+ *     whitespace only.
+ * @deprecated Use goog.string.isEmptyOrWhitespace instead.
+ */
+goog.string.isEmptySafe = goog.string.isEmptyOrWhitespaceSafe;
+
+
+/**
+ * Checks if a string is all breaking whitespace.
+ * @param {string} str The string to check.
+ * @return {boolean} Whether the string is all breaking whitespace.
+ */
+goog.string.isBreakingWhitespace = function(str) {
+  return !/[^\t\n\r ]/.test(str);
+};
+
+
+/**
+ * Checks if a string contains all letters.
+ * @param {string} str string to check.
+ * @return {boolean} True if {@code str} consists entirely of letters.
+ */
+goog.string.isAlpha = function(str) {
+  return !/[^a-zA-Z]/.test(str);
+};
+
+
+/**
+ * Checks if a string contains only numbers.
+ * @param {*} str string to check. If not a string, it will be
+ *     casted to one.
+ * @return {boolean} True if {@code str} is numeric.
+ */
+goog.string.isNumeric = function(str) {
+  return !/[^0-9]/.test(str);
+};
+
+
+/**
+ * Checks if a string contains only numbers or letters.
+ * @param {string} str string to check.
+ * @return {boolean} True if {@code str} is alphanumeric.
+ */
+goog.string.isAlphaNumeric = function(str) {
+  return !/[^a-zA-Z0-9]/.test(str);
+};
+
+
+/**
+ * Checks if a character is a space character.
+ * @param {string} ch Character to check.
+ * @return {boolean} True if {@code ch} is a space.
+ */
+goog.string.isSpace = function(ch) {
+  return ch == ' ';
+};
+
+
+/**
+ * Checks if a character is a valid unicode character.
+ * @param {string} ch Character to check.
+ * @return {boolean} True if {@code ch} is a valid unicode character.
+ */
+goog.string.isUnicodeChar = function(ch) {
+  return ch.length == 1 && ch >= ' ' && ch <= '~' ||
+      ch >= '\u0080' && ch <= '\uFFFD';
+};
+
+
+/**
+ * Takes a string and replaces newlines with a space. Multiple lines are
+ * replaced with a single space.
+ * @param {string} str The string from which to strip newlines.
+ * @return {string} A copy of {@code str} stripped of newlines.
+ */
+goog.string.stripNewlines = function(str) {
+  return str.replace(/(\r\n|\r|\n)+/g, ' ');
+};
+
+
+/**
+ * Replaces Windows and Mac new lines with unix style: \r or \r\n with \n.
+ * @param {string} str The string to in which to canonicalize newlines.
+ * @return {string} {@code str} A copy of {@code} with canonicalized newlines.
+ */
+goog.string.canonicalizeNewlines = function(str) {
+  return str.replace(/(\r\n|\r|\n)/g, '\n');
+};
+
+
+/**
+ * Normalizes whitespace in a string, replacing all whitespace chars with
+ * a space.
+ * @param {string} str The string in which to normalize whitespace.
+ * @return {string} A copy of {@code str} with all whitespace normalized.
+ */
+goog.string.normalizeWhitespace = function(str) {
+  return str.replace(/\xa0|\s/g, ' ');
+};
+
+
+/**
+ * Normalizes spaces in a string, replacing all consecutive spaces and tabs
+ * with a single space. Replaces non-breaking space with a space.
+ * @param {string} str The string in which to normalize spaces.
+ * @return {string} A copy of {@code str} with all consecutive spaces and tabs
+ *    replaced with a single space.
+ */
+goog.string.normalizeSpaces = function(str) {
+  return str.replace(/\xa0|[ \t]+/g, ' ');
+};
+
+
+/**
+ * Removes the breaking spaces from the left and right of the string and
+ * collapses the sequences of breaking spaces in the middle into single spaces.
+ * The original and the result strings render the same way in HTML.
+ * @param {string} str A string in which to collapse spaces.
+ * @return {string} Copy of the string with normalized breaking spaces.
+ */
+goog.string.collapseBreakingSpaces = function(str) {
+  return str.replace(/[\t\r\n ]+/g, ' ')
+      .replace(/^[\t\r\n ]+|[\t\r\n ]+$/g, '');
+};
+
+
+/**
+ * Trims white spaces to the left and right of a string.
+ * @param {string} str The string to trim.
+ * @return {string} A trimmed copy of {@code str}.
+ */
+goog.string.trim =
+    (goog.TRUSTED_SITE && String.prototype.trim) ? function(str) {
+      return str.trim();
+    } : function(str) {
+      // Since IE doesn't include non-breaking-space (0xa0) in their \s
+      // character class (as required by section 7.2 of the ECMAScript spec),
+      // we explicitly include it in the regexp to enforce consistent
+      // cross-browser behavior.
+      return str.replace(/^[\s\xa0]+|[\s\xa0]+$/g, '');
+    };
+
+
+/**
+ * Trims whitespaces at the left end of a string.
+ * @param {string} str The string to left trim.
+ * @return {string} A trimmed copy of {@code str}.
+ */
+goog.string.trimLeft = function(str) {
+  // Since IE doesn't include non-breaking-space (0xa0) in their \s character
+  // class (as required by section 7.2 of the ECMAScript spec), we explicitly
+  // include it in the regexp to enforce consistent cross-browser behavior.
+  return str.replace(/^[\s\xa0]+/, '');
+};
+
+
+/**
+ * Trims whitespaces at the right end of a string.
+ * @param {string} str The string to right trim.
+ * @return {string} A trimmed copy of {@code str}.
+ */
+goog.string.trimRight = function(str) {
+  // Since IE doesn't include non-breaking-space (0xa0) in their \s character
+  // class (as required by section 7.2 of the ECMAScript spec), we explicitly
+  // include it in the regexp to enforce consistent cross-browser behavior.
+  return str.replace(/[\s\xa0]+$/, '');
+};
+
+
+/**
+ * A string comparator that ignores case.
+ * -1 = str1 less than str2
+ *  0 = str1 equals str2
+ *  1 = str1 greater than str2
+ *
+ * @param {string} str1 The string to compare.
+ * @param {string} str2 The string to compare {@code str1} to.
+ * @return {number} The comparator result, as described above.
+ */
+goog.string.caseInsensitiveCompare = function(str1, str2) {
+  var test1 = String(str1).toLowerCase();
+  var test2 = String(str2).toLowerCase();
+
+  if (test1 < test2) {
+    return -1;
+  } else if (test1 == test2) {
+    return 0;
+  } else {
+    return 1;
+  }
+};
+
+
+/**
+ * Compares two strings interpreting their numeric substrings as numbers.
+ *
+ * @param {string} str1 First string.
+ * @param {string} str2 Second string.
+ * @param {!RegExp} tokenizerRegExp Splits a string into substrings of
+ *     non-negative integers, non-numeric characters and optionally fractional
+ *     numbers starting with a decimal point.
+ * @return {number} Negative if str1 < str2, 0 is str1 == str2, positive if
+ *     str1 > str2.
+ * @private
+ */
+goog.string.numberAwareCompare_ = function(str1, str2, tokenizerRegExp) {
+  if (str1 == str2) {
+    return 0;
+  }
+  if (!str1) {
+    return -1;
+  }
+  if (!str2) {
+    return 1;
+  }
+
+  // Using match to split the entire string ahead of time turns out to be faster
+  // for most inputs than using RegExp.exec or iterating over each character.
+  var tokens1 = str1.toLowerCase().match(tokenizerRegExp);
+  var tokens2 = str2.toLowerCase().match(tokenizerRegExp);
+
+  var count = Math.min(tokens1.length, tokens2.length);
+
+  for (var i = 0; i < count; i++) {
+    var a = tokens1[i];
+    var b = tokens2[i];
+
+    // Compare pairs of tokens, returning if one token sorts before the other.
+    if (a != b) {
+      // Only if both tokens are integers is a special comparison required.
+      // Decimal numbers are sorted as strings (e.g., '.09' < '.1').
+      var num1 = parseInt(a, 10);
+      if (!isNaN(num1)) {
+        var num2 = parseInt(b, 10);
+        if (!isNaN(num2) && num1 - num2) {
+          return num1 - num2;
+        }
+      }
+      return a < b ? -1 : 1;
+    }
+  }
+
+  // If one string is a substring of the other, the shorter string sorts first.
+  if (tokens1.length != tokens2.length) {
+    return tokens1.length - tokens2.length;
+  }
+
+  // The two strings must be equivalent except for case (perfect equality is
+  // tested at the head of the function.) Revert to default ASCII string
+  // comparison to stabilize the sort.
+  return str1 < str2 ? -1 : 1;
+};
+
+
+/**
+ * String comparison function that handles non-negative integer numbers in a
+ * way humans might expect. Using this function, the string 'File 2.jpg' sorts
+ * before 'File 10.jpg', and 'Version 1.9' before 'Version 1.10'. The comparison
+ * is mostly case-insensitive, though strings that are identical except for case
+ * are sorted with the upper-case strings before lower-case.
+ *
+ * This comparison function is up to 50x slower than either the default or the
+ * case-insensitive compare. It should not be used in time-critical code, but
+ * should be fast enough to sort several hundred short strings (like filenames)
+ * with a reasonable delay.
+ *
+ * @param {string} str1 The string to compare in a numerically sensitive way.
+ * @param {string} str2 The string to compare {@code str1} to.
+ * @return {number} less than 0 if str1 < str2, 0 if str1 == str2, greater than
+ *     0 if str1 > str2.
+ */
+goog.string.intAwareCompare = function(str1, str2) {
+  return goog.string.numberAwareCompare_(str1, str2, /\d+|\D+/g);
+};
+
+
+/**
+ * String comparison function that handles non-negative integer and fractional
+ * numbers in a way humans might expect. Using this function, the string
+ * 'File 2.jpg' sorts before 'File 10.jpg', and '3.14' before '3.2'. Equivalent
+ * to {@link goog.string.intAwareCompare} apart from the way how it interprets
+ * dots.
+ *
+ * @param {string} str1 The string to compare in a numerically sensitive way.
+ * @param {string} str2 The string to compare {@code str1} to.
+ * @return {number} less than 0 if str1 < str2, 0 if str1 == str2, greater than
+ *     0 if str1 > str2.
+ */
+goog.string.floatAwareCompare = function(str1, str2) {
+  return goog.string.numberAwareCompare_(str1, str2, /\d+|\.\d+|\D+/g);
+};
+
+
+/**
+ * Alias for {@link goog.string.floatAwareCompare}.
+ *
+ * @param {string} str1
+ * @param {string} str2
+ * @return {number}
+ */
+goog.string.numerateCompare = goog.string.floatAwareCompare;
+
+
+/**
+ * URL-encodes a string
+ * @param {*} str The string to url-encode.
+ * @return {string} An encoded copy of {@code str} that is safe for urls.
+ *     Note that '#', ':', and other characters used to delimit portions
+ *     of URLs *will* be encoded.
+ */
+goog.string.urlEncode = function(str) {
+  return encodeURIComponent(String(str));
+};
+
+
+/**
+ * URL-decodes the string. We need to specially handle '+'s because
+ * the javascript library doesn't convert them to spaces.
+ * @param {string} str The string to url decode.
+ * @return {string} The decoded {@code str}.
+ */
+goog.string.urlDecode = function(str) {
+  return decodeURIComponent(str.replace(/\+/g, ' '));
+};
+
+
+/**
+ * Converts \n to <br>s or <br />s.
+ * @param {string} str The string in which to convert newlines.
+ * @param {boolean=} opt_xml Whether to use XML compatible tags.
+ * @return {string} A copy of {@code str} with converted newlines.
+ */
+goog.string.newLineToBr = function(str, opt_xml) {
+  return str.replace(/(\r\n|\r|\n)/g, opt_xml ? '<br />' : '<br>');
+};
+
+
+/**
+ * Escapes double quote '"' and single quote '\'' characters in addition to
+ * '&', '<', and '>' so that a string can be included in an HTML tag attribute
+ * value within double or single quotes.
+ *
+ * It should be noted that > doesn't need to be escaped for the HTML or XML to
+ * be valid, but it has been decided to escape it for consistency with other
+ * implementations.
+ *
+ * With goog.string.DETECT_DOUBLE_ESCAPING, this function escapes also the
+ * lowercase letter "e".
+ *
+ * NOTE(user):
+ * HtmlEscape is often called during the generation of large blocks of HTML.
+ * Using statics for the regular expressions and strings is an optimization
+ * that can more than half the amount of time IE spends in this function for
+ * large apps, since strings and regexes both contribute to GC allocations.
+ *
+ * Testing for the presence of a character before escaping increases the number
+ * of function calls, but actually provides a speed increase for the average
+ * case -- since the average case often doesn't require the escaping of all 4
+ * characters and indexOf() is much cheaper than replace().
+ * The worst case does suffer slightly from the additional calls, therefore the
+ * opt_isLikelyToContainHtmlChars option has been included for situations
+ * where all 4 HTML entities are very likely to be present and need escaping.
+ *
+ * Some benchmarks (times tended to fluctuate +-0.05ms):
+ *                                     FireFox                     IE6
+ * (no chars / average (mix of cases) / all 4 chars)
+ * no checks                     0.13 / 0.22 / 0.22         0.23 / 0.53 / 0.80
+ * indexOf                       0.08 / 0.17 / 0.26         0.22 / 0.54 / 0.84
+ * indexOf + re test             0.07 / 0.17 / 0.28         0.19 / 0.50 / 0.85
+ *
+ * An additional advantage of checking if replace actually needs to be called
+ * is a reduction in the number of object allocations, so as the size of the
+ * application grows the difference between the various methods would increase.
+ *
+ * @param {string} str string to be escaped.
+ * @param {boolean=} opt_isLikelyToContainHtmlChars Don't perform a check to see
+ *     if the character needs replacing - use this option if you expect each of
+ *     the characters to appear often. Leave false if you expect few html
+ *     characters to occur in your strings, such as if you are escaping HTML.
+ * @return {string} An escaped copy of {@code str}.
+ */
+goog.string.htmlEscape = function(str, opt_isLikelyToContainHtmlChars) {
+
+  if (opt_isLikelyToContainHtmlChars) {
+    str = str.replace(goog.string.AMP_RE_, '&amp;')
+              .replace(goog.string.LT_RE_, '&lt;')
+              .replace(goog.string.GT_RE_, '&gt;')
+              .replace(goog.string.QUOT_RE_, '&quot;')
+              .replace(goog.string.SINGLE_QUOTE_RE_, '&#39;')
+              .replace(goog.string.NULL_RE_, '&#0;');
+    if (goog.string.DETECT_DOUBLE_ESCAPING) {
+      str = str.replace(goog.string.E_RE_, '&#101;');
+    }
+    return str;
+
+  } else {
+    // quick test helps in the case when there are no chars to replace, in
+    // worst case this makes barely a difference to the time taken
+    if (!goog.string.ALL_RE_.test(str)) return str;
+
+    // str.indexOf is faster than regex.test in this case
+    if (str.indexOf('&') != -1) {
+      str = str.replace(goog.string.AMP_RE_, '&amp;');
+    }
+    if (str.indexOf('<') != -1) {
+      str = str.replace(goog.string.LT_RE_, '&lt;');
+    }
+    if (str.indexOf('>') != -1) {
+      str = str.replace(goog.string.GT_RE_, '&gt;');
+    }
+    if (str.indexOf('"') != -1) {
+      str = str.replace(goog.string.QUOT_RE_, '&quot;');
+    }
+    if (str.indexOf('\'') != -1) {
+      str = str.replace(goog.string.SINGLE_QUOTE_RE_, '&#39;');
+    }
+    if (str.indexOf('\x00') != -1) {
+      str = str.replace(goog.string.NULL_RE_, '&#0;');
+    }
+    if (goog.string.DETECT_DOUBLE_ESCAPING && str.indexOf('e') != -1) {
+      str = str.replace(goog.string.E_RE_, '&#101;');
+    }
+    return str;
+  }
+};
+
+
+/**
+ * Regular expression that matches an ampersand, for use in escaping.
+ * @const {!RegExp}
+ * @private
+ */
+goog.string.AMP_RE_ = /&/g;
+
+
+/**
+ * Regular expression that matches a less than sign, for use in escaping.
+ * @const {!RegExp}
+ * @private
+ */
+goog.string.LT_RE_ = /</g;
+
+
+/**
+ * Regular expression that matches a greater than sign, for use in escaping.
+ * @const {!RegExp}
+ * @private
+ */
+goog.string.GT_RE_ = />/g;
+
+
+/**
+ * Regular expression that matches a double quote, for use in escaping.
+ * @const {!RegExp}
+ * @private
+ */
+goog.string.QUOT_RE_ = /"/g;
+
+
+/**
+ * Regular expression that matches a single quote, for use in escaping.
+ * @const {!RegExp}
+ * @private
+ */
+goog.string.SINGLE_QUOTE_RE_ = /'/g;
+
+
+/**
+ * Regular expression that matches null character, for use in escaping.
+ * @const {!RegExp}
+ * @private
+ */
+goog.string.NULL_RE_ = /\x00/g;
+
+
+/**
+ * Regular expression that matches a lowercase letter "e", for use in escaping.
+ * @const {!RegExp}
+ * @private
+ */
+goog.string.E_RE_ = /e/g;
+
+
+/**
+ * Regular expression that matches any character that needs to be escaped.
+ * @const {!RegExp}
+ * @private
+ */
+goog.string.ALL_RE_ =
+    (goog.string.DETECT_DOUBLE_ESCAPING ? /[\x00&<>"'e]/ : /[\x00&<>"']/);
+
+
+/**
+ * Unescapes an HTML string.
+ *
+ * @param {string} str The string to unescape.
+ * @return {string} An unescaped copy of {@code str}.
+ */
+goog.string.unescapeEntities = function(str) {
+  if (goog.string.contains(str, '&')) {
+    // We are careful not to use a DOM if we do not have one or we explicitly
+    // requested non-DOM html unescaping.
+    if (!goog.string.FORCE_NON_DOM_HTML_UNESCAPING &&
+        'document' in goog.global) {
+      return goog.string.unescapeEntitiesUsingDom_(str);
+    } else {
+      // Fall back on pure XML entities
+      return goog.string.unescapePureXmlEntities_(str);
+    }
+  }
+  return str;
+};
+
+
+/**
+ * Unescapes a HTML string using the provided document.
+ *
+ * @param {string} str The string to unescape.
+ * @param {!Document} document A document to use in escaping the string.
+ * @return {string} An unescaped copy of {@code str}.
+ */
+goog.string.unescapeEntitiesWithDocument = function(str, document) {
+  if (goog.string.contains(str, '&')) {
+    return goog.string.unescapeEntitiesUsingDom_(str, document);
+  }
+  return str;
+};
+
+
+/**
+ * Unescapes an HTML string using a DOM to resolve non-XML, non-numeric
+ * entities. This function is XSS-safe and whitespace-preserving.
+ * @private
+ * @param {string} str The string to unescape.
+ * @param {Document=} opt_document An optional document to use for creating
+ *     elements. If this is not specified then the default window.document
+ *     will be used.
+ * @return {string} The unescaped {@code str} string.
+ */
+goog.string.unescapeEntitiesUsingDom_ = function(str, opt_document) {
+  /** @type {!Object<string, string>} */
+  var seen = {'&amp;': '&', '&lt;': '<', '&gt;': '>', '&quot;': '"'};
+  var div;
+  if (opt_document) {
+    div = opt_document.createElement('div');
+  } else {
+    div = goog.global.document.createElement('div');
+  }
+  // Match as many valid entity characters as possible. If the actual entity
+  // happens to be shorter, it will still work as innerHTML will return the
+  // trailing characters unchanged. Since the entity characters do not include
+  // open angle bracket, there is no chance of XSS from the innerHTML use.
+  // Since no whitespace is passed to innerHTML, whitespace is preserved.
+  return str.replace(goog.string.HTML_ENTITY_PATTERN_, function(s, entity) {
+    // Check for cached entity.
+    var value = seen[s];
+    if (value) {
+      return value;
+    }
+    // Check for numeric entity.
+    if (entity.charAt(0) == '#') {
+      // Prefix with 0 so that hex entities (e.g. &#x10) parse as hex numbers.
+      var n = Number('0' + entity.substr(1));
+      if (!isNaN(n)) {
+        value = String.fromCharCode(n);
+      }
+    }
+    // Fall back to innerHTML otherwise.
+    if (!value) {
+      // Append a non-entity character to avoid a bug in Webkit that parses
+      // an invalid entity at the end of innerHTML text as the empty string.
+      div.innerHTML = s + ' ';
+      // Then remove the trailing character from the result.
+      value = div.firstChild.nodeValue.slice(0, -1);
+    }
+    // Cache and return.
+    return seen[s] = value;
+  });
+};
+
+
+/**
+ * Unescapes XML entities.
+ * @private
+ * @param {string} str The string to unescape.
+ * @return {string} An unescaped copy of {@code str}.
+ */
+goog.string.unescapePureXmlEntities_ = function(str) {
+  return str.replace(/&([^;]+);/g, function(s, entity) {
+    switch (entity) {
+      case 'amp':
+        return '&';
+      case 'lt':
+        return '<';
+      case 'gt':
+        return '>';
+      case 'quot':
+        return '"';
+      default:
+        if (entity.charAt(0) == '#') {
+          // Prefix with 0 so that hex entities (e.g. &#x10) parse as hex.
+          var n = Number('0' + entity.substr(1));
+          if (!isNaN(n)) {
+            return String.fromCharCode(n);
+          }
+        }
+        // For invalid entities we just return the entity
+        return s;
+    }
+  });
+};
+
+
+/**
+ * Regular expression that matches an HTML entity.
+ * See also HTML5: Tokenization / Tokenizing character references.
+ * @private
+ * @type {!RegExp}
+ */
+goog.string.HTML_ENTITY_PATTERN_ = /&([^;\s<&]+);?/g;
+
+
+/**
+ * Do escaping of whitespace to preserve spatial formatting. We use character
+ * entity #160 to make it safer for xml.
+ * @param {string} str The string in which to escape whitespace.
+ * @param {boolean=} opt_xml Whether to use XML compatible tags.
+ * @return {string} An escaped copy of {@code str}.
+ */
+goog.string.whitespaceEscape = function(str, opt_xml) {
+  // This doesn't use goog.string.preserveSpaces for backwards compatibility.
+  return goog.string.newLineToBr(str.replace(/  /g, ' &#160;'), opt_xml);
+};
+
+
+/**
+ * Preserve spaces that would be otherwise collapsed in HTML by replacing them
+ * with non-breaking space Unicode characters.
+ * @param {string} str The string in which to preserve whitespace.
+ * @return {string} A copy of {@code str} with preserved whitespace.
+ */
+goog.string.preserveSpaces = function(str) {
+  return str.replace(/(^|[\n ]) /g, '$1' + goog.string.Unicode.NBSP);
+};
+
+
+/**
+ * Strip quote characters around a string.  The second argument is a string of
+ * characters to treat as quotes.  This can be a single character or a string of
+ * multiple character and in that case each of those are treated as possible
+ * quote characters. For example:
+ *
+ * <pre>
+ * goog.string.stripQuotes('"abc"', '"`') --> 'abc'
+ * goog.string.stripQuotes('`abc`', '"`') --> 'abc'
+ * </pre>
+ *
+ * @param {string} str The string to strip.
+ * @param {string} quoteChars The quote characters to strip.
+ * @return {string} A copy of {@code str} without the quotes.
+ */
+goog.string.stripQuotes = function(str, quoteChars) {
+  var length = quoteChars.length;
+  for (var i = 0; i < length; i++) {
+    var quoteChar = length == 1 ? quoteChars : quoteChars.charAt(i);
+    if (str.charAt(0) == quoteChar && str.charAt(str.length - 1) == quoteChar) {
+      return str.substring(1, str.length - 1);
+    }
+  }
+  return str;
+};
+
+
+/**
+ * Truncates a string to a certain length and adds '...' if necessary.  The
+ * length also accounts for the ellipsis, so a maximum length of 10 and a string
+ * 'Hello World!' produces 'Hello W...'.
+ * @param {string} str The string to truncate.
+ * @param {number} chars Max number of characters.
+ * @param {boolean=} opt_protectEscapedCharacters Whether to protect escaped
+ *     characters from being cut off in the middle.
+ * @return {string} The truncated {@code str} string.
+ */
+goog.string.truncate = function(str, chars, opt_protectEscapedCharacters) {
+  if (opt_protectEscapedCharacters) {
+    str = goog.string.unescapeEntities(str);
+  }
+
+  if (str.length > chars) {
+    str = str.substring(0, chars - 3) + '...';
+  }
+
+  if (opt_protectEscapedCharacters) {
+    str = goog.string.htmlEscape(str);
+  }
+
+  return str;
+};
+
+
+/**
+ * Truncate a string in the middle, adding "..." if necessary,
+ * and favoring the beginning of the string.
+ * @param {string} str The string to truncate the middle of.
+ * @param {number} chars Max number of characters.
+ * @param {boolean=} opt_protectEscapedCharacters Whether to protect escaped
+ *     characters from being cutoff in the middle.
+ * @param {number=} opt_trailingChars Optional number of trailing characters to
+ *     leave at the end of the string, instead of truncating as close to the
+ *     middle as possible.
+ * @return {string} A truncated copy of {@code str}.
+ */
+goog.string.truncateMiddle = function(
+    str, chars, opt_protectEscapedCharacters, opt_trailingChars) {
+  if (opt_protectEscapedCharacters) {
+    str = goog.string.unescapeEntities(str);
+  }
+
+  if (opt_trailingChars && str.length > chars) {
+    if (opt_trailingChars > chars) {
+      opt_trailingChars = chars;
+    }
+    var endPoint = str.length - opt_trailingChars;
+    var startPoint = chars - opt_trailingChars;
+    str = str.substring(0, startPoint) + '...' + str.substring(endPoint);
+  } else if (str.length > chars) {
+    // Favor the beginning of the string:
+    var half = Math.floor(chars / 2);
+    var endPos = str.length - half;
+    half += chars % 2;
+    str = str.substring(0, half) + '...' + str.substring(endPos);
+  }
+
+  if (opt_protectEscapedCharacters) {
+    str = goog.string.htmlEscape(str);
+  }
+
+  return str;
+};
+
+
+/**
+ * Special chars that need to be escaped for goog.string.quote.
+ * @private {!Object<string, string>}
+ */
+goog.string.specialEscapeChars_ = {
+  '\0': '\\0',
+  '\b': '\\b',
+  '\f': '\\f',
+  '\n': '\\n',
+  '\r': '\\r',
+  '\t': '\\t',
+  '\x0B': '\\x0B',  // '\v' is not supported in JScript
+  '"': '\\"',
+  '\\': '\\\\',
+  // To support the use case of embedding quoted strings inside of script
+  // tags, we have to make sure HTML comments and opening/closing script tags do
+  // not appear in the resulting string. The specific strings that must be
+  // escaped are documented at:
+  // http://www.w3.org/TR/html51/semantics.html#restrictions-for-contents-of-script-elements
+  '<': '\x3c'
+};
+
+
+/**
+ * Character mappings used internally for goog.string.escapeChar.
+ * @private {!Object<string, string>}
+ */
+goog.string.jsEscapeCache_ = {
+  '\'': '\\\''
+};
+
+
+/**
+ * Encloses a string in double quotes and escapes characters so that the
+ * string is a valid JS string. The resulting string is safe to embed in
+ * `<script>` tags as "<" is escaped.
+ * @param {string} s The string to quote.
+ * @return {string} A copy of {@code s} surrounded by double quotes.
+ */
+goog.string.quote = function(s) {
+  s = String(s);
+  var sb = ['"'];
+  for (var i = 0; i < s.length; i++) {
+    var ch = s.charAt(i);
+    var cc = ch.charCodeAt(0);
+    sb[i + 1] = goog.string.specialEscapeChars_[ch] ||
+        ((cc > 31 && cc < 127) ? ch : goog.string.escapeChar(ch));
+  }
+  sb.push('"');
+  return sb.join('');
+};
+
+
+/**
+ * Takes a string and returns the escaped string for that input string.
+ * @param {string} str The string to escape.
+ * @return {string} An escaped string representing {@code str}.
+ */
+goog.string.escapeString = function(str) {
+  var sb = [];
+  for (var i = 0; i < str.length; i++) {
+    sb[i] = goog.string.escapeChar(str.charAt(i));
+  }
+  return sb.join('');
+};
+
+
+/**
+ * Takes a character and returns the escaped string for that character. For
+ * example escapeChar(String.fromCharCode(15)) -> "\\x0E".
+ * @param {string} c The character to escape.
+ * @return {string} An escaped string representing {@code c}.
+ */
+goog.string.escapeChar = function(c) {
+  if (c in goog.string.jsEscapeCache_) {
+    return goog.string.jsEscapeCache_[c];
+  }
+
+  if (c in goog.string.specialEscapeChars_) {
+    return goog.string.jsEscapeCache_[c] = goog.string.specialEscapeChars_[c];
+  }
+
+  var rv = c;
+  var cc = c.charCodeAt(0);
+  if (cc > 31 && cc < 127) {
+    rv = c;
+  } else {
+    // tab is 9 but handled above
+    if (cc < 256) {
+      rv = '\\x';
+      if (cc < 16 || cc > 256) {
+        rv += '0';
+      }
+    } else {
+      rv = '\\u';
+      if (cc < 4096) {  // \u1000
+        rv += '0';
+      }
+    }
+    rv += cc.toString(16).toUpperCase();
+  }
+
+  return goog.string.jsEscapeCache_[c] = rv;
+};
+
+
+/**
+ * Determines whether a string contains a substring.
+ * @param {string} str The string to search.
+ * @param {string} subString The substring to search for.
+ * @return {boolean} Whether {@code str} contains {@code subString}.
+ */
+goog.string.contains = function(str, subString) {
+  return str.indexOf(subString) != -1;
+};
+
+
+/**
+ * Determines whether a string contains a substring, ignoring case.
+ * @param {string} str The string to search.
+ * @param {string} subString The substring to search for.
+ * @return {boolean} Whether {@code str} contains {@code subString}.
+ */
+goog.string.caseInsensitiveContains = function(str, subString) {
+  return goog.string.contains(str.toLowerCase(), subString.toLowerCase());
+};
+
+
+/**
+ * Returns the non-overlapping occurrences of ss in s.
+ * If either s or ss evalutes to false, then returns zero.
+ * @param {string} s The string to look in.
+ * @param {string} ss The string to look for.
+ * @return {number} Number of occurrences of ss in s.
+ */
+goog.string.countOf = function(s, ss) {
+  return s && ss ? s.split(ss).length - 1 : 0;
+};
+
+
+/**
+ * Removes a substring of a specified length at a specific
+ * index in a string.
+ * @param {string} s The base string from which to remove.
+ * @param {number} index The index at which to remove the substring.
+ * @param {number} stringLength The length of the substring to remove.
+ * @return {string} A copy of {@code s} with the substring removed or the full
+ *     string if nothing is removed or the input is invalid.
+ */
+goog.string.removeAt = function(s, index, stringLength) {
+  var resultStr = s;
+  // If the index is greater or equal to 0 then remove substring
+  if (index >= 0 && index < s.length && stringLength > 0) {
+    resultStr = s.substr(0, index) +
+        s.substr(index + stringLength, s.length - index - stringLength);
+  }
+  return resultStr;
+};
+
+
+/**
+ * Removes the first occurrence of a substring from a string.
+ * @param {string} str The base string from which to remove.
+ * @param {string} substr The string to remove.
+ * @return {string} A copy of {@code str} with {@code substr} removed or the
+ *     full string if nothing is removed.
+ */
+goog.string.remove = function(str, substr) {
+  return str.replace(substr, '');
+};
+
+
+/**
+ *  Removes all occurrences of a substring from a string.
+ *  @param {string} s The base string from which to remove.
+ *  @param {string} ss The string to remove.
+ *  @return {string} A copy of {@code s} with {@code ss} removed or the full
+ *      string if nothing is removed.
+ */
+goog.string.removeAll = function(s, ss) {
+  var re = new RegExp(goog.string.regExpEscape(ss), 'g');
+  return s.replace(re, '');
+};
+
+
+/**
+ *  Replaces all occurrences of a substring of a string with a new substring.
+ *  @param {string} s The base string from which to remove.
+ *  @param {string} ss The string to replace.
+ *  @param {string} replacement The replacement string.
+ *  @return {string} A copy of {@code s} with {@code ss} replaced by
+ *      {@code replacement} or the original string if nothing is replaced.
+ */
+goog.string.replaceAll = function(s, ss, replacement) {
+  var re = new RegExp(goog.string.regExpEscape(ss), 'g');
+  return s.replace(re, replacement.replace(/\$/g, '$$$$'));
+};
+
+
+/**
+ * Escapes characters in the string that are not safe to use in a RegExp.
+ * @param {*} s The string to escape. If not a string, it will be casted
+ *     to one.
+ * @return {string} A RegExp safe, escaped copy of {@code s}.
+ */
+goog.string.regExpEscape = function(s) {
+  return String(s)
+      .replace(/([-()\[\]{}+?*.$\^|,:#<!\\])/g, '\\$1')
+      .replace(/\x08/g, '\\x08');
+};
+
+
+/**
+ * Repeats a string n times.
+ * @param {string} string The string to repeat.
+ * @param {number} length The number of times to repeat.
+ * @return {string} A string containing {@code length} repetitions of
+ *     {@code string}.
+ */
+goog.string.repeat = (String.prototype.repeat) ? function(string, length) {
+  // The native method is over 100 times faster than the alternative.
+  return string.repeat(length);
+} : function(string, length) {
+  return new Array(length + 1).join(string);
+};
+
+
+/**
+ * Pads number to given length and optionally rounds it to a given precision.
+ * For example:
+ * <pre>padNumber(1.25, 2, 3) -> '01.250'
+ * padNumber(1.25, 2) -> '01.25'
+ * padNumber(1.25, 2, 1) -> '01.3'
+ * padNumber(1.25, 0) -> '1.25'</pre>
+ *
+ * @param {number} num The number to pad.
+ * @param {number} length The desired length.
+ * @param {number=} opt_precision The desired precision.
+ * @return {string} {@code num} as a string with the given options.
+ */
+goog.string.padNumber = function(num, length, opt_precision) {
+  var s = goog.isDef(opt_precision) ? num.toFixed(opt_precision) : String(num);
+  var index = s.indexOf('.');
+  if (index == -1) {
+    index = s.length;
+  }
+  return goog.string.repeat('0', Math.max(0, length - index)) + s;
+};
+
+
+/**
+ * Returns a string representation of the given object, with
+ * null and undefined being returned as the empty string.
+ *
+ * @param {*} obj The object to convert.
+ * @return {string} A string representation of the {@code obj}.
+ */
+goog.string.makeSafe = function(obj) {
+  return obj == null ? '' : String(obj);
+};
+
+
+/**
+ * Concatenates string expressions. This is useful
+ * since some browsers are very inefficient when it comes to using plus to
+ * concat strings. Be careful when using null and undefined here since
+ * these will not be included in the result. If you need to represent these
+ * be sure to cast the argument to a String first.
+ * For example:
+ * <pre>buildString('a', 'b', 'c', 'd') -> 'abcd'
+ * buildString(null, undefined) -> ''
+ * </pre>
+ * @param {...*} var_args A list of strings to concatenate. If not a string,
+ *     it will be casted to one.
+ * @return {string} The concatenation of {@code var_args}.
+ */
+goog.string.buildString = function(var_args) {
+  return Array.prototype.join.call(arguments, '');
+};
+
+
+/**
+ * Returns a string with at least 64-bits of randomness.
+ *
+ * Doesn't trust Javascript's random function entirely. Uses a combination of
+ * random and current timestamp, and then encodes the string in base-36 to
+ * make it shorter.
+ *
+ * @return {string} A random string, e.g. sn1s7vb4gcic.
+ */
+goog.string.getRandomString = function() {
+  var x = 2147483648;
+  return Math.floor(Math.random() * x).toString(36) +
+      Math.abs(Math.floor(Math.random() * x) ^ goog.now()).toString(36);
+};
+
+
+/**
+ * Compares two version numbers.
+ *
+ * @param {string|number} version1 Version of first item.
+ * @param {string|number} version2 Version of second item.
+ *
+ * @return {number}  1 if {@code version1} is higher.
+ *                   0 if arguments are equal.
+ *                  -1 if {@code version2} is higher.
+ */
+goog.string.compareVersions = function(version1, version2) {
+  var order = 0;
+  // Trim leading and trailing whitespace and split the versions into
+  // subversions.
+  var v1Subs = goog.string.trim(String(version1)).split('.');
+  var v2Subs = goog.string.trim(String(version2)).split('.');
+  var subCount = Math.max(v1Subs.length, v2Subs.length);
+
+  // Iterate over the subversions, as long as they appear to be equivalent.
+  for (var subIdx = 0; order == 0 && subIdx < subCount; subIdx++) {
+    var v1Sub = v1Subs[subIdx] || '';
+    var v2Sub = v2Subs[subIdx] || '';
+
+    do {
+      // Split the subversions into pairs of numbers and qualifiers (like 'b').
+      // Two different RegExp objects are use to make it clear the code
+      // is side-effect free
+      var v1Comp = /(\d*)(\D*)(.*)/.exec(v1Sub) || ['', '', '', ''];
+      var v2Comp = /(\d*)(\D*)(.*)/.exec(v2Sub) || ['', '', '', ''];
+      // Break if there are no more matches.
+      if (v1Comp[0].length == 0 && v2Comp[0].length == 0) {
+        break;
+      }
+
+      // Parse the numeric part of the subversion. A missing number is
+      // equivalent to 0.
+      var v1CompNum = v1Comp[1].length == 0 ? 0 : parseInt(v1Comp[1], 10);
+      var v2CompNum = v2Comp[1].length == 0 ? 0 : parseInt(v2Comp[1], 10);
+
+      // Compare the subversion components. The number has the highest
+      // precedence. Next, if the numbers are equal, a subversion without any
+      // qualifier is always higher than a subversion with any qualifier. Next,
+      // the qualifiers are compared as strings.
+      order = goog.string.compareElements_(v1CompNum, v2CompNum) ||
+          goog.string.compareElements_(
+              v1Comp[2].length == 0, v2Comp[2].length == 0) ||
+          goog.string.compareElements_(v1Comp[2], v2Comp[2]);
+      // Stop as soon as an inequality is discovered.
+
+      v1Sub = v1Comp[3];
+      v2Sub = v2Comp[3];
+    } while (order == 0);
+  }
+
+  return order;
+};
+
+
+/**
+ * Compares elements of a version number.
+ *
+ * @param {string|number|boolean} left An element from a version number.
+ * @param {string|number|boolean} right An element from a version number.
+ *
+ * @return {number}  1 if {@code left} is higher.
+ *                   0 if arguments are equal.
+ *                  -1 if {@code right} is higher.
+ * @private
+ */
+goog.string.compareElements_ = function(left, right) {
+  if (left < right) {
+    return -1;
+  } else if (left > right) {
+    return 1;
+  }
+  return 0;
+};
+
+
+/**
+ * String hash function similar to java.lang.String.hashCode().
+ * The hash code for a string is computed as
+ * s[0] * 31 ^ (n - 1) + s[1] * 31 ^ (n - 2) + ... + s[n - 1],
+ * where s[i] is the ith character of the string and n is the length of
+ * the string. We mod the result to make it between 0 (inclusive) and 2^32
+ * (exclusive).
+ * @param {string} str A string.
+ * @return {number} Hash value for {@code str}, between 0 (inclusive) and 2^32
+ *  (exclusive). The empty string returns 0.
+ */
+goog.string.hashCode = function(str) {
+  var result = 0;
+  for (var i = 0; i < str.length; ++i) {
+    // Normalize to 4 byte range, 0 ... 2^32.
+    result = (31 * result + str.charCodeAt(i)) >>> 0;
+  }
+  return result;
+};
+
+
+/**
+ * The most recent unique ID. |0 is equivalent to Math.floor in this case.
+ * @type {number}
+ * @private
+ */
+goog.string.uniqueStringCounter_ = Math.random() * 0x80000000 | 0;
+
+
+/**
+ * Generates and returns a string which is unique in the current document.
+ * This is useful, for example, to create unique IDs for DOM elements.
+ * @return {string} A unique id.
+ */
+goog.string.createUniqueString = function() {
+  return 'goog_' + goog.string.uniqueStringCounter_++;
+};
+
+
+/**
+ * Converts the supplied string to a number, which may be Infinity or NaN.
+ * This function strips whitespace: (toNumber(' 123') === 123)
+ * This function accepts scientific notation: (toNumber('1e1') === 10)
+ *
+ * This is better than Javascript's built-in conversions because, sadly:
+ *     (Number(' ') === 0) and (parseFloat('123a') === 123)
+ *
+ * @param {string} str The string to convert.
+ * @return {number} The number the supplied string represents, or NaN.
+ */
+goog.string.toNumber = function(str) {
+  var num = Number(str);
+  if (num == 0 && goog.string.isEmptyOrWhitespace(str)) {
+    return NaN;
+  }
+  return num;
+};
+
+
+/**
+ * Returns whether the given string is lower camel case (e.g. "isFooBar").
+ *
+ * Note that this assumes the string is entirely letters.
+ * @see http://en.wikipedia.org/wiki/CamelCase#Variations_and_synonyms
+ *
+ * @param {string} str String to test.
+ * @return {boolean} Whether the string is lower camel case.
+ */
+goog.string.isLowerCamelCase = function(str) {
+  return /^[a-z]+([A-Z][a-z]*)*$/.test(str);
+};
+
+
+/**
+ * Returns whether the given string is upper camel case (e.g. "FooBarBaz").
+ *
+ * Note that this assumes the string is entirely letters.
+ * @see http://en.wikipedia.org/wiki/CamelCase#Variations_and_synonyms
+ *
+ * @param {string} str String to test.
+ * @return {boolean} Whether the string is upper camel case.
+ */
+goog.string.isUpperCamelCase = function(str) {
+  return /^([A-Z][a-z]*)+$/.test(str);
+};
+
+
+/**
+ * Converts a string from selector-case to camelCase (e.g. from
+ * "multi-part-string" to "multiPartString"), useful for converting
+ * CSS selectors and HTML dataset keys to their equivalent JS properties.
+ * @param {string} str The string in selector-case form.
+ * @return {string} The string in camelCase form.
+ */
+goog.string.toCamelCase = function(str) {
+  return String(str).replace(
+      /\-([a-z])/g, function(all, match) { return match.toUpperCase(); });
+};
+
+
+/**
+ * Converts a string from camelCase to selector-case (e.g. from
+ * "multiPartString" to "multi-part-string"), useful for converting JS
+ * style and dataset properties to equivalent CSS selectors and HTML keys.
+ * @param {string} str The string in camelCase form.
+ * @return {string} The string in selector-case form.
+ */
+goog.string.toSelectorCase = function(str) {
+  return String(str).replace(/([A-Z])/g, '-$1').toLowerCase();
+};
+
+
+/**
+ * Converts a string into TitleCase. First character of the string is always
+ * capitalized in addition to the first letter of every subsequent word.
+ * Words are delimited by one or more whitespaces by default. Custom delimiters
+ * can optionally be specified to replace the default, which doesn't preserve
+ * whitespace delimiters and instead must be explicitly included if needed.
+ *
+ * Default delimiter => " ":
+ *    goog.string.toTitleCase('oneTwoThree')    => 'OneTwoThree'
+ *    goog.string.toTitleCase('one two three')  => 'One Two Three'
+ *    goog.string.toTitleCase('  one   two   ') => '  One   Two   '
+ *    goog.string.toTitleCase('one_two_three')  => 'One_two_three'
+ *    goog.string.toTitleCase('one-two-three')  => 'One-two-three'
+ *
+ * Custom delimiter => "_-.":
+ *    goog.string.toTitleCase('oneTwoThree', '_-.')       => 'OneTwoThree'
+ *    goog.string.toTitleCase('one two three', '_-.')     => 'One two three'
+ *    goog.string.toTitleCase('  one   two   ', '_-.')    => '  one   two   '
+ *    goog.string.toTitleCase('one_two_three', '_-.')     => 'One_Two_Three'
+ *    goog.string.toTitleCase('one-two-three', '_-.')     => 'One-Two-Three'
+ *    goog.string.toTitleCase('one...two...three', '_-.') => 'One...Two...Three'
+ *    goog.string.toTitleCase('one. two. three', '_-.')   => 'One. two. three'
+ *    goog.string.toTitleCase('one-two.three', '_-.')     => 'One-Two.Three'
+ *
+ * @param {string} str String value in camelCase form.
+ * @param {string=} opt_delimiters Custom delimiter character set used to
+ *      distinguish words in the string value. Each character represents a
+ *      single delimiter. When provided, default whitespace delimiter is
+ *      overridden and must be explicitly included if needed.
+ * @return {string} String value in TitleCase form.
+ */
+goog.string.toTitleCase = function(str, opt_delimiters) {
+  var delimiters = goog.isString(opt_delimiters) ?
+      goog.string.regExpEscape(opt_delimiters) :
+      '\\s';
+
+  // For IE8, we need to prevent using an empty character set. Otherwise,
+  // incorrect matching will occur.
+  delimiters = delimiters ? '|[' + delimiters + ']+' : '';
+
+  var regexp = new RegExp('(^' + delimiters + ')([a-z])', 'g');
+  return str.replace(
+      regexp, function(all, p1, p2) { return p1 + p2.toUpperCase(); });
+};
+
+
+/**
+ * Capitalizes a string, i.e. converts the first letter to uppercase
+ * and all other letters to lowercase, e.g.:
+ *
+ * goog.string.capitalize('one')     => 'One'
+ * goog.string.capitalize('ONE')     => 'One'
+ * goog.string.capitalize('one two') => 'One two'
+ *
+ * Note that this function does not trim initial whitespace.
+ *
+ * @param {string} str String value to capitalize.
+ * @return {string} String value with first letter in uppercase.
+ */
+goog.string.capitalize = function(str) {
+  return String(str.charAt(0)).toUpperCase() +
+      String(str.substr(1)).toLowerCase();
+};
+
+
+/**
+ * Parse a string in decimal or hexidecimal ('0xFFFF') form.
+ *
+ * To parse a particular radix, please use parseInt(string, radix) directly. See
+ * https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/parseInt
+ *
+ * This is a wrapper for the built-in parseInt function that will only parse
+ * numbers as base 10 or base 16.  Some JS implementations assume strings
+ * starting with "0" are intended to be octal. ES3 allowed but discouraged
+ * this behavior. ES5 forbids it.  This function emulates the ES5 behavior.
+ *
+ * For more information, see Mozilla JS Reference: http://goo.gl/8RiFj
+ *
+ * @param {string|number|null|undefined} value The value to be parsed.
+ * @return {number} The number, parsed. If the string failed to parse, this
+ *     will be NaN.
+ */
+goog.string.parseInt = function(value) {
+  // Force finite numbers to strings.
+  if (isFinite(value)) {
+    value = String(value);
+  }
+
+  if (goog.isString(value)) {
+    // If the string starts with '0x' or '-0x', parse as hex.
+    return /^\s*-?0x/i.test(value) ? parseInt(value, 16) : parseInt(value, 10);
+  }
+
+  return NaN;
+};
+
+
+/**
+ * Splits a string on a separator a limited number of times.
+ *
+ * This implementation is more similar to Python or Java, where the limit
+ * parameter specifies the maximum number of splits rather than truncating
+ * the number of results.
+ *
+ * See http://docs.python.org/2/library/stdtypes.html#str.split
+ * See JavaDoc: http://goo.gl/F2AsY
+ * See Mozilla reference: http://goo.gl/dZdZs
+ *
+ * @param {string} str String to split.
+ * @param {string} separator The separator.
+ * @param {number} limit The limit to the number of splits. The resulting array
+ *     will have a maximum length of limit+1.  Negative numbers are the same
+ *     as zero.
+ * @return {!Array<string>} The string, split.
+ */
+goog.string.splitLimit = function(str, separator, limit) {
+  var parts = str.split(separator);
+  var returnVal = [];
+
+  // Only continue doing this while we haven't hit the limit and we have
+  // parts left.
+  while (limit > 0 && parts.length) {
+    returnVal.push(parts.shift());
+    limit--;
+  }
+
+  // If there are remaining parts, append them to the end.
+  if (parts.length) {
+    returnVal.push(parts.join(separator));
+  }
+
+  return returnVal;
+};
+
+
+/**
+ * Finds the characters to the right of the last instance of any separator
+ *
+ * This function is similar to goog.string.path.baseName, except it can take a
+ * list of characters to split the string on. It will return the rightmost
+ * grouping of characters to the right of any separator as a left-to-right
+ * oriented string.
+ *
+ * @see goog.string.path.baseName
+ * @param {string} str The string
+ * @param {string|!Array<string>} separators A list of separator characters
+ * @return {string} The last part of the string with respect to the separators
+ */
+goog.string.lastComponent = function(str, separators) {
+  if (!separators) {
+    return str;
+  } else if (typeof separators == 'string') {
+    separators = [separators];
+  }
+
+  var lastSeparatorIndex = -1;
+  for (var i = 0; i < separators.length; i++) {
+    if (separators[i] == '') {
+      continue;
+    }
+    var currentSeparatorIndex = str.lastIndexOf(separators[i]);
+    if (currentSeparatorIndex > lastSeparatorIndex) {
+      lastSeparatorIndex = currentSeparatorIndex;
+    }
+  }
+  if (lastSeparatorIndex == -1) {
+    return str;
+  }
+  return str.slice(lastSeparatorIndex + 1);
+};
+
+
+/**
+ * Computes the Levenshtein edit distance between two strings.
+ * @param {string} a
+ * @param {string} b
+ * @return {number} The edit distance between the two strings.
+ */
+goog.string.editDistance = function(a, b) {
+  var v0 = [];
+  var v1 = [];
+
+  if (a == b) {
+    return 0;
+  }
+
+  if (!a.length || !b.length) {
+    return Math.max(a.length, b.length);
+  }
+
+  for (var i = 0; i < b.length + 1; i++) {
+    v0[i] = i;
+  }
+
+  for (var i = 0; i < a.length; i++) {
+    v1[0] = i + 1;
+
+    for (var j = 0; j < b.length; j++) {
+      var cost = Number(a[i] != b[j]);
+      // Cost for the substring is the minimum of adding one character, removing
+      // one character, or a swap.
+      v1[j + 1] = Math.min(v1[j] + 1, v0[j + 1] + 1, v0[j] + cost);
+    }
+
+    for (var j = 0; j < v0.length; j++) {
+      v0[j] = v1[j];
+    }
+  }
+
+  return v1[b.length];
+};
diff --git a/src/assets/viz/2/goog/string/stringbuffer.js b/src/assets/viz/2/goog/string/stringbuffer.js
new file mode 100644
index 0000000..478b08b
--- /dev/null
+++ b/src/assets/viz/2/goog/string/stringbuffer.js
@@ -0,0 +1,103 @@
+// Copyright 2006 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 Utility for fast string concatenation.
+ */
+
+goog.provide('goog.string.StringBuffer');
+
+
+
+/**
+ * Utility class to facilitate string concatenation.
+ *
+ * @param {*=} opt_a1 Optional first initial item to append.
+ * @param {...*} var_args Other initial items to
+ *     append, e.g., new goog.string.StringBuffer('foo', 'bar').
+ * @constructor
+ */
+goog.string.StringBuffer = function(opt_a1, var_args) {
+  if (opt_a1 != null) {
+    this.append.apply(this, arguments);
+  }
+};
+
+
+/**
+ * Internal buffer for the string to be concatenated.
+ * @type {string}
+ * @private
+ */
+goog.string.StringBuffer.prototype.buffer_ = '';
+
+
+/**
+ * Sets the contents of the string buffer object, replacing what's currently
+ * there.
+ *
+ * @param {*} s String to set.
+ */
+goog.string.StringBuffer.prototype.set = function(s) {
+  this.buffer_ = '' + s;
+};
+
+
+/**
+ * Appends one or more items to the buffer.
+ *
+ * Calling this with null, undefined, or empty arguments is an error.
+ *
+ * @param {*} a1 Required first string.
+ * @param {*=} opt_a2 Optional second string.
+ * @param {...?} var_args Other items to append,
+ *     e.g., sb.append('foo', 'bar', 'baz').
+ * @return {!goog.string.StringBuffer} This same StringBuffer object.
+ * @suppress {duplicate}
+ */
+goog.string.StringBuffer.prototype.append = function(a1, opt_a2, var_args) {
+  // Use a1 directly to avoid arguments instantiation for single-arg case.
+  this.buffer_ += String(a1);
+  if (opt_a2 != null) {  // second argument is undefined (null == undefined)
+    for (var i = 1; i < arguments.length; i++) {
+      this.buffer_ += arguments[i];
+    }
+  }
+  return this;
+};
+
+
+/**
+ * Clears the internal buffer.
+ */
+goog.string.StringBuffer.prototype.clear = function() {
+  this.buffer_ = '';
+};
+
+
+/**
+ * @return {number} the length of the current contents of the buffer.
+ */
+goog.string.StringBuffer.prototype.getLength = function() {
+  return this.buffer_.length;
+};
+
+
+/**
+ * @return {string} The concatenated string.
+ * @override
+ */
+goog.string.StringBuffer.prototype.toString = function() {
+  return this.buffer_;
+};
diff --git a/src/assets/viz/2/goog/string/stringformat.js b/src/assets/viz/2/goog/string/stringformat.js
new file mode 100644
index 0000000..58d7af9
--- /dev/null
+++ b/src/assets/viz/2/goog/string/stringformat.js
@@ -0,0 +1,221 @@
+// Copyright 2008 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 Implementation of sprintf-like, python-%-operator-like,
+ * .NET-String.Format-like functionality. Uses JS string's replace method to
+ * extract format specifiers and sends those specifiers to a handler function,
+ * which then, based on conversion type part of the specifier, calls the
+ * appropriate function to handle the specific conversion.
+ * For specific functionality implemented, look at formatRe below, or look
+ * at the tests.
+ */
+
+goog.provide('goog.string.format');
+
+goog.require('goog.string');
+
+
+/**
+ * Performs sprintf-like conversion, i.e. puts the values in a template.
+ * DO NOT use it instead of built-in conversions in simple cases such as
+ * 'Cost: %.2f' as it would introduce unnecessary latency opposed to
+ * 'Cost: ' + cost.toFixed(2).
+ * @param {string} formatString Template string containing % specifiers.
+ * @param {...string|number} var_args Values formatString is to be filled with.
+ * @return {string} Formatted string.
+ */
+goog.string.format = function(formatString, var_args) {
+
+  // Convert the arguments to an array (MDC recommended way).
+  var args = Array.prototype.slice.call(arguments);
+
+  // Try to get the template.
+  var template = args.shift();
+  if (typeof template == 'undefined') {
+    throw Error('[goog.string.format] Template required');
+  }
+
+  // This re is used for matching, it also defines what is supported.
+  var formatRe = /%([0\-\ \+]*)(\d+)?(\.(\d+))?([%sfdiu])/g;
+
+  /**
+   * Chooses which conversion function to call based on type conversion
+   * specifier.
+   * @param {string} match Contains the re matched string.
+   * @param {string} flags Formatting flags.
+   * @param {string} width Replacement string minimum width.
+   * @param {string} dotp Matched precision including a dot.
+   * @param {string} precision Specifies floating point precision.
+   * @param {string} type Type conversion specifier.
+   * @param {string} offset Matching location in the original string.
+   * @param {string} wholeString Has the actualString being searched.
+   * @return {string} Formatted parameter.
+   */
+  function replacerDemuxer(
+      match, flags, width, dotp, precision, type, offset, wholeString) {
+    // The % is too simple and doesn't take an argument.
+    if (type == '%') {
+      return '%';
+    }
+
+    // Try to get the actual value from parent function.
+    var value = args.shift();
+
+    // If we didn't get any arguments, fail.
+    if (typeof value == 'undefined') {
+      throw Error('[goog.string.format] Not enough arguments');
+    }
+
+    // Patch the value argument to the beginning of our type specific call.
+    arguments[0] = value;
+
+    return goog.string.format.demuxes_[type].apply(null, arguments);
+  }
+
+  return template.replace(formatRe, replacerDemuxer);
+};
+
+
+/**
+ * Contains various conversion functions (to be filled in later on).
+ * @private {!Object}
+ */
+goog.string.format.demuxes_ = {};
+
+
+/**
+ * Processes %s conversion specifier.
+ * @param {string} value Contains the formatRe matched string.
+ * @param {string} flags Formatting flags.
+ * @param {string} width Replacement string minimum width.
+ * @param {string} dotp Matched precision including a dot.
+ * @param {string} precision Specifies floating point precision.
+ * @param {string} type Type conversion specifier.
+ * @param {string} offset Matching location in the original string.
+ * @param {string} wholeString Has the actualString being searched.
+ * @return {string} Replacement string.
+ */
+goog.string.format.demuxes_['s'] = function(
+    value, flags, width, dotp, precision, type, offset, wholeString) {
+  var replacement = value;
+  // If no padding is necessary we're done.
+  // The check for '' is necessary because Firefox incorrectly provides the
+  // empty string instead of undefined for non-participating capture groups,
+  // and isNaN('') == false.
+  if (isNaN(width) || width == '' || replacement.length >= Number(width)) {
+    return replacement;
+  }
+
+  // Otherwise we should find out where to put spaces.
+  if (flags.indexOf('-', 0) > -1) {
+    replacement = replacement +
+        goog.string.repeat(' ', Number(width) - replacement.length);
+  } else {
+    replacement = goog.string.repeat(' ', Number(width) - replacement.length) +
+        replacement;
+  }
+  return replacement;
+};
+
+
+/**
+ * Processes %f conversion specifier.
+ * @param {string} value Contains the formatRe matched string.
+ * @param {string} flags Formatting flags.
+ * @param {string} width Replacement string minimum width.
+ * @param {string} dotp Matched precision including a dot.
+ * @param {string} precision Specifies floating point precision.
+ * @param {string} type Type conversion specifier.
+ * @param {string} offset Matching location in the original string.
+ * @param {string} wholeString Has the actualString being searched.
+ * @return {string} Replacement string.
+ */
+goog.string.format.demuxes_['f'] = function(
+    value, flags, width, dotp, precision, type, offset, wholeString) {
+
+  var replacement = value.toString();
+
+  // The check for '' is necessary because Firefox incorrectly provides the
+  // empty string instead of undefined for non-participating capture groups,
+  // and isNaN('') == false.
+  if (!(isNaN(precision) || precision == '')) {
+    replacement = parseFloat(value).toFixed(precision);
+  }
+
+  // Generates sign string that will be attached to the replacement.
+  var sign;
+  if (Number(value) < 0) {
+    sign = '-';
+  } else if (flags.indexOf('+') >= 0) {
+    sign = '+';
+  } else if (flags.indexOf(' ') >= 0) {
+    sign = ' ';
+  } else {
+    sign = '';
+  }
+
+  if (Number(value) >= 0) {
+    replacement = sign + replacement;
+  }
+
+  // If no padding is necessary we're done.
+  if (isNaN(width) || replacement.length >= Number(width)) {
+    return replacement;
+  }
+
+  // We need a clean signless replacement to start with
+  replacement = isNaN(precision) ? Math.abs(Number(value)).toString() :
+                                   Math.abs(Number(value)).toFixed(precision);
+
+  var padCount = Number(width) - replacement.length - sign.length;
+
+  // Find out which side to pad, and if it's left side, then which character to
+  // pad, and set the sign on the left and padding in the middle.
+  if (flags.indexOf('-', 0) >= 0) {
+    replacement = sign + replacement + goog.string.repeat(' ', padCount);
+  } else {
+    // Decides which character to pad.
+    var paddingChar = (flags.indexOf('0', 0) >= 0) ? '0' : ' ';
+    replacement =
+        sign + goog.string.repeat(paddingChar, padCount) + replacement;
+  }
+
+  return replacement;
+};
+
+
+/**
+ * Processes %d conversion specifier.
+ * @param {string} value Contains the formatRe matched string.
+ * @param {string} flags Formatting flags.
+ * @param {string} width Replacement string minimum width.
+ * @param {string} dotp Matched precision including a dot.
+ * @param {string} precision Specifies floating point precision.
+ * @param {string} type Type conversion specifier.
+ * @param {string} offset Matching location in the original string.
+ * @param {string} wholeString Has the actualString being searched.
+ * @return {string} Replacement string.
+ */
+goog.string.format.demuxes_['d'] = function(
+    value, flags, width, dotp, precision, type, offset, wholeString) {
+  return goog.string.format.demuxes_['f'](
+      parseInt(value, 10) /* value */, flags, width, dotp, 0 /* precision */,
+      type, offset, wholeString);
+};
+
+
+// These are additional aliases, for integer conversion.
+goog.string.format.demuxes_['i'] = goog.string.format.demuxes_['d'];
+goog.string.format.demuxes_['u'] = goog.string.format.demuxes_['d'];
diff --git a/src/assets/viz/2/goog/string/typedstring.js b/src/assets/viz/2/goog/string/typedstring.js
new file mode 100644
index 0000000..d0d7bd9
--- /dev/null
+++ b/src/assets/viz/2/goog/string/typedstring.js
@@ -0,0 +1,48 @@
+// 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.
+
+goog.provide('goog.string.TypedString');
+
+
+
+/**
+ * Wrapper for strings that conform to a data type or language.
+ *
+ * Implementations of this interface are wrappers for strings, and typically
+ * associate a type contract with the wrapped string.  Concrete implementations
+ * of this interface may choose to implement additional run-time type checking,
+ * see for example {@code goog.html.SafeHtml}. If available, client code that
+ * needs to ensure type membership of an object should use the type's function
+ * to assert type membership, such as {@code goog.html.SafeHtml.unwrap}.
+ * @interface
+ */
+goog.string.TypedString = function() {};
+
+
+/**
+ * Interface marker of the TypedString interface.
+ *
+ * This property can be used to determine at runtime whether or not an object
+ * implements this interface.  All implementations of this interface set this
+ * property to {@code true}.
+ * @type {boolean}
+ */
+goog.string.TypedString.prototype.implementsGoogStringTypedString;
+
+
+/**
+ * Retrieves this wrapped string's value.
+ * @return {string} The wrapped string's value.
+ */
+goog.string.TypedString.prototype.getTypedStringValue;