add viz 2 post

4 files changed, 801 insertions, 0 deletions

diff --git a/assets/viz/2/goog/labs/useragent/browser.js b/assets/viz/2/goog/labs/useragent/browser.js
new file mode 100644
index 0000000..a7dd638
--- /dev/null
+++ b/assets/viz/2/goog/labs/useragent/browser.js
@@ -0,0 +1,338 @@
+// 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 Closure user agent detection (Browser).
+ * @see <a href="http://www.useragentstring.com/">User agent strings</a>
+ * For more information on rendering engine, platform, or device see the other
+ * sub-namespaces in goog.labs.userAgent, goog.labs.userAgent.platform,
+ * goog.labs.userAgent.device respectively.)
+ *
+ * @author martone@google.com (Andy Martone)
+ */
+
+goog.provide('goog.labs.userAgent.browser');
+
+goog.require('goog.array');
+goog.require('goog.labs.userAgent.util');
+goog.require('goog.object');
+goog.require('goog.string');
+
+
+// TODO(nnaze): Refactor to remove excessive exclusion logic in matching
+// functions.
+
+
+/**
+ * @return {boolean} Whether the user's browser is Opera.  Note: Chromium
+ *     based Opera (Opera 15+) is detected as Chrome to avoid unnecessary
+ *     special casing.
+ * @private
+ */
+goog.labs.userAgent.browser.matchOpera_ = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Opera');
+};
+
+
+/**
+ * @return {boolean} Whether the user's browser is IE.
+ * @private
+ */
+goog.labs.userAgent.browser.matchIE_ = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Trident') ||
+      goog.labs.userAgent.util.matchUserAgent('MSIE');
+};
+
+
+/**
+ * @return {boolean} Whether the user's browser is Edge.
+ * @private
+ */
+goog.labs.userAgent.browser.matchEdge_ = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Edge');
+};
+
+
+/**
+ * @return {boolean} Whether the user's browser is Firefox.
+ * @private
+ */
+goog.labs.userAgent.browser.matchFirefox_ = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Firefox');
+};
+
+
+/**
+ * @return {boolean} Whether the user's browser is Safari.
+ * @private
+ */
+goog.labs.userAgent.browser.matchSafari_ = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Safari') &&
+      !(goog.labs.userAgent.browser.matchChrome_() ||
+        goog.labs.userAgent.browser.matchCoast_() ||
+        goog.labs.userAgent.browser.matchOpera_() ||
+        goog.labs.userAgent.browser.matchEdge_() ||
+        goog.labs.userAgent.browser.isSilk() ||
+        goog.labs.userAgent.util.matchUserAgent('Android'));
+};
+
+
+/**
+ * @return {boolean} Whether the user's browser is Coast (Opera's Webkit-based
+ *     iOS browser).
+ * @private
+ */
+goog.labs.userAgent.browser.matchCoast_ = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Coast');
+};
+
+
+/**
+ * @return {boolean} Whether the user's browser is iOS Webview.
+ * @private
+ */
+goog.labs.userAgent.browser.matchIosWebview_ = function() {
+  // iOS Webview does not show up as Chrome or Safari. Also check for Opera's
+  // WebKit-based iOS browser, Coast.
+  return (goog.labs.userAgent.util.matchUserAgent('iPad') ||
+          goog.labs.userAgent.util.matchUserAgent('iPhone')) &&
+      !goog.labs.userAgent.browser.matchSafari_() &&
+      !goog.labs.userAgent.browser.matchChrome_() &&
+      !goog.labs.userAgent.browser.matchCoast_() &&
+      goog.labs.userAgent.util.matchUserAgent('AppleWebKit');
+};
+
+
+/**
+ * @return {boolean} Whether the user's browser is Chrome.
+ * @private
+ */
+goog.labs.userAgent.browser.matchChrome_ = function() {
+  return (goog.labs.userAgent.util.matchUserAgent('Chrome') ||
+          goog.labs.userAgent.util.matchUserAgent('CriOS')) &&
+      !goog.labs.userAgent.browser.matchEdge_();
+};
+
+
+/**
+ * @return {boolean} Whether the user's browser is the Android browser.
+ * @private
+ */
+goog.labs.userAgent.browser.matchAndroidBrowser_ = function() {
+  // Android can appear in the user agent string for Chrome on Android.
+  // This is not the Android standalone browser if it does.
+  return goog.labs.userAgent.util.matchUserAgent('Android') &&
+      !(goog.labs.userAgent.browser.isChrome() ||
+        goog.labs.userAgent.browser.isFirefox() ||
+        goog.labs.userAgent.browser.isOpera() ||
+        goog.labs.userAgent.browser.isSilk());
+};
+
+
+/**
+ * @return {boolean} Whether the user's browser is Opera.
+ */
+goog.labs.userAgent.browser.isOpera = goog.labs.userAgent.browser.matchOpera_;
+
+
+/**
+ * @return {boolean} Whether the user's browser is IE.
+ */
+goog.labs.userAgent.browser.isIE = goog.labs.userAgent.browser.matchIE_;
+
+
+/**
+ * @return {boolean} Whether the user's browser is Edge.
+ */
+goog.labs.userAgent.browser.isEdge = goog.labs.userAgent.browser.matchEdge_;
+
+
+/**
+ * @return {boolean} Whether the user's browser is Firefox.
+ */
+goog.labs.userAgent.browser.isFirefox =
+    goog.labs.userAgent.browser.matchFirefox_;
+
+
+/**
+ * @return {boolean} Whether the user's browser is Safari.
+ */
+goog.labs.userAgent.browser.isSafari = goog.labs.userAgent.browser.matchSafari_;
+
+
+/**
+ * @return {boolean} Whether the user's browser is Coast (Opera's Webkit-based
+ *     iOS browser).
+ */
+goog.labs.userAgent.browser.isCoast = goog.labs.userAgent.browser.matchCoast_;
+
+
+/**
+ * @return {boolean} Whether the user's browser is iOS Webview.
+ */
+goog.labs.userAgent.browser.isIosWebview =
+    goog.labs.userAgent.browser.matchIosWebview_;
+
+
+/**
+ * @return {boolean} Whether the user's browser is Chrome.
+ */
+goog.labs.userAgent.browser.isChrome = goog.labs.userAgent.browser.matchChrome_;
+
+
+/**
+ * @return {boolean} Whether the user's browser is the Android browser.
+ */
+goog.labs.userAgent.browser.isAndroidBrowser =
+    goog.labs.userAgent.browser.matchAndroidBrowser_;
+
+
+/**
+ * For more information, see:
+ * http://docs.aws.amazon.com/silk/latest/developerguide/user-agent.html
+ * @return {boolean} Whether the user's browser is Silk.
+ */
+goog.labs.userAgent.browser.isSilk = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Silk');
+};
+
+
+/**
+ * @return {string} The browser version or empty string if version cannot be
+ *     determined. Note that for Internet Explorer, this returns the version of
+ *     the browser, not the version of the rendering engine. (IE 8 in
+ *     compatibility mode will return 8.0 rather than 7.0. To determine the
+ *     rendering engine version, look at document.documentMode instead. See
+ *     http://msdn.microsoft.com/en-us/library/cc196988(v=vs.85).aspx for more
+ *     details.)
+ */
+goog.labs.userAgent.browser.getVersion = function() {
+  var userAgentString = goog.labs.userAgent.util.getUserAgent();
+  // Special case IE since IE's version is inside the parenthesis and
+  // without the '/'.
+  if (goog.labs.userAgent.browser.isIE()) {
+    return goog.labs.userAgent.browser.getIEVersion_(userAgentString);
+  }
+
+  var versionTuples =
+      goog.labs.userAgent.util.extractVersionTuples(userAgentString);
+
+  // Construct a map for easy lookup.
+  var versionMap = {};
+  goog.array.forEach(versionTuples, function(tuple) {
+    // Note that the tuple is of length three, but we only care about the
+    // first two.
+    var key = tuple[0];
+    var value = tuple[1];
+    versionMap[key] = value;
+  });
+
+  var versionMapHasKey = goog.partial(goog.object.containsKey, versionMap);
+
+  // Gives the value with the first key it finds, otherwise empty string.
+  function lookUpValueWithKeys(keys) {
+    var key = goog.array.find(keys, versionMapHasKey);
+    return versionMap[key] || '';
+  }
+
+  // Check Opera before Chrome since Opera 15+ has "Chrome" in the string.
+  // See
+  // http://my.opera.com/ODIN/blog/2013/07/15/opera-user-agent-strings-opera-15-and-beyond
+  if (goog.labs.userAgent.browser.isOpera()) {
+    // Opera 10 has Version/10.0 but Opera/9.8, so look for "Version" first.
+    // Opera uses 'OPR' for more recent UAs.
+    return lookUpValueWithKeys(['Version', 'Opera']);
+  }
+
+  // Check Edge before Chrome since it has Chrome in the string.
+  if (goog.labs.userAgent.browser.isEdge()) {
+    return lookUpValueWithKeys(['Edge']);
+  }
+
+  if (goog.labs.userAgent.browser.isChrome()) {
+    return lookUpValueWithKeys(['Chrome', 'CriOS']);
+  }
+
+  // Usually products browser versions are in the third tuple after "Mozilla"
+  // and the engine.
+  var tuple = versionTuples[2];
+  return tuple && tuple[1] || '';
+};
+
+
+/**
+ * @param {string|number} version The version to check.
+ * @return {boolean} Whether the browser version is higher or the same as the
+ *     given version.
+ */
+goog.labs.userAgent.browser.isVersionOrHigher = function(version) {
+  return goog.string.compareVersions(
+             goog.labs.userAgent.browser.getVersion(), version) >= 0;
+};
+
+
+/**
+ * Determines IE version. More information:
+ * http://msdn.microsoft.com/en-us/library/ie/bg182625(v=vs.85).aspx#uaString
+ * http://msdn.microsoft.com/en-us/library/hh869301(v=vs.85).aspx
+ * http://blogs.msdn.com/b/ie/archive/2010/03/23/introducing-ie9-s-user-agent-string.aspx
+ * http://blogs.msdn.com/b/ie/archive/2009/01/09/the-internet-explorer-8-user-agent-string-updated-edition.aspx
+ *
+ * @param {string} userAgent the User-Agent.
+ * @return {string}
+ * @private
+ */
+goog.labs.userAgent.browser.getIEVersion_ = function(userAgent) {
+  // IE11 may identify itself as MSIE 9.0 or MSIE 10.0 due to an IE 11 upgrade
+  // bug. Example UA:
+  // Mozilla/5.0 (MSIE 9.0; Windows NT 6.1; WOW64; Trident/7.0; rv:11.0)
+  // like Gecko.
+  // See http://www.whatismybrowser.com/developers/unknown-user-agent-fragments.
+  var rv = /rv: *([\d\.]*)/.exec(userAgent);
+  if (rv && rv[1]) {
+    return rv[1];
+  }
+
+  var version = '';
+  var msie = /MSIE +([\d\.]+)/.exec(userAgent);
+  if (msie && msie[1]) {
+    // IE in compatibility mode usually identifies itself as MSIE 7.0; in this
+    // case, use the Trident version to determine the version of IE. For more
+    // details, see the links above.
+    var tridentVersion = /Trident\/(\d.\d)/.exec(userAgent);
+    if (msie[1] == '7.0') {
+      if (tridentVersion && tridentVersion[1]) {
+        switch (tridentVersion[1]) {
+          case '4.0':
+            version = '8.0';
+            break;
+          case '5.0':
+            version = '9.0';
+            break;
+          case '6.0':
+            version = '10.0';
+            break;
+          case '7.0':
+            version = '11.0';
+            break;
+        }
+      } else {
+        version = '7.0';
+      }
+    } else {
+      version = msie[1];
+    }
+  }
+  return version;
+};
diff --git a/assets/viz/2/goog/labs/useragent/engine.js b/assets/viz/2/goog/labs/useragent/engine.js
new file mode 100644
index 0000000..31c5667
--- /dev/null
+++ b/assets/viz/2/goog/labs/useragent/engine.js
@@ -0,0 +1,156 @@
+// 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 Closure user agent detection.
+ * @see http://en.wikipedia.org/wiki/User_agent
+ * For more information on browser brand, platform, or device see the other
+ * sub-namespaces in goog.labs.userAgent (browser, platform, and device).
+ *
+ */
+
+goog.provide('goog.labs.userAgent.engine');
+
+goog.require('goog.array');
+goog.require('goog.labs.userAgent.util');
+goog.require('goog.string');
+
+
+/**
+ * @return {boolean} Whether the rendering engine is Presto.
+ */
+goog.labs.userAgent.engine.isPresto = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Presto');
+};
+
+
+/**
+ * @return {boolean} Whether the rendering engine is Trident.
+ */
+goog.labs.userAgent.engine.isTrident = function() {
+  // IE only started including the Trident token in IE8.
+  return goog.labs.userAgent.util.matchUserAgent('Trident') ||
+      goog.labs.userAgent.util.matchUserAgent('MSIE');
+};
+
+
+/**
+ * @return {boolean} Whether the rendering engine is Edge.
+ */
+goog.labs.userAgent.engine.isEdge = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Edge');
+};
+
+
+/**
+ * @return {boolean} Whether the rendering engine is WebKit.
+ */
+goog.labs.userAgent.engine.isWebKit = function() {
+  return goog.labs.userAgent.util.matchUserAgentIgnoreCase('WebKit') &&
+      !goog.labs.userAgent.engine.isEdge();
+};
+
+
+/**
+ * @return {boolean} Whether the rendering engine is Gecko.
+ */
+goog.labs.userAgent.engine.isGecko = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Gecko') &&
+      !goog.labs.userAgent.engine.isWebKit() &&
+      !goog.labs.userAgent.engine.isTrident() &&
+      !goog.labs.userAgent.engine.isEdge();
+};
+
+
+/**
+ * @return {string} The rendering engine's version or empty string if version
+ *     can't be determined.
+ */
+goog.labs.userAgent.engine.getVersion = function() {
+  var userAgentString = goog.labs.userAgent.util.getUserAgent();
+  if (userAgentString) {
+    var tuples = goog.labs.userAgent.util.extractVersionTuples(userAgentString);
+
+    var engineTuple = goog.labs.userAgent.engine.getEngineTuple_(tuples);
+    if (engineTuple) {
+      // In Gecko, the version string is either in the browser info or the
+      // Firefox version.  See Gecko user agent string reference:
+      // http://goo.gl/mULqa
+      if (engineTuple[0] == 'Gecko') {
+        return goog.labs.userAgent.engine.getVersionForKey_(tuples, 'Firefox');
+      }
+
+      return engineTuple[1];
+    }
+
+    // MSIE has only one version identifier, and the Trident version is
+    // specified in the parenthetical. IE Edge is covered in the engine tuple
+    // detection.
+    var browserTuple = tuples[0];
+    var info;
+    if (browserTuple && (info = browserTuple[2])) {
+      var match = /Trident\/([^\s;]+)/.exec(info);
+      if (match) {
+        return match[1];
+      }
+    }
+  }
+  return '';
+};
+
+
+/**
+ * @param {!Array<!Array<string>>} tuples Extracted version tuples.
+ * @return {!Array<string>|undefined} The engine tuple or undefined if not
+ *     found.
+ * @private
+ */
+goog.labs.userAgent.engine.getEngineTuple_ = function(tuples) {
+  if (!goog.labs.userAgent.engine.isEdge()) {
+    return tuples[1];
+  }
+  for (var i = 0; i < tuples.length; i++) {
+    var tuple = tuples[i];
+    if (tuple[0] == 'Edge') {
+      return tuple;
+    }
+  }
+};
+
+
+/**
+ * @param {string|number} version The version to check.
+ * @return {boolean} Whether the rendering engine version is higher or the same
+ *     as the given version.
+ */
+goog.labs.userAgent.engine.isVersionOrHigher = function(version) {
+  return goog.string.compareVersions(
+             goog.labs.userAgent.engine.getVersion(), version) >= 0;
+};
+
+
+/**
+ * @param {!Array<!Array<string>>} tuples Version tuples.
+ * @param {string} key The key to look for.
+ * @return {string} The version string of the given key, if present.
+ *     Otherwise, the empty string.
+ * @private
+ */
+goog.labs.userAgent.engine.getVersionForKey_ = function(tuples, key) {
+  // TODO(nnaze): Move to util if useful elsewhere.
+
+  var pair = goog.array.find(tuples, function(pair) { return key == pair[0]; });
+
+  return pair && pair[1] || '';
+};
diff --git a/assets/viz/2/goog/labs/useragent/platform.js b/assets/viz/2/goog/labs/useragent/platform.js
new file mode 100644
index 0000000..9c72402
--- /dev/null
+++ b/assets/viz/2/goog/labs/useragent/platform.js
@@ -0,0 +1,160 @@
+// 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 Closure user agent platform detection.
+ * @see <a href="http://www.useragentstring.com/">User agent strings</a>
+ * For more information on browser brand, rendering engine, or device see the
+ * other sub-namespaces in goog.labs.userAgent (browser, engine, and device
+ * respectively).
+ *
+ */
+
+goog.provide('goog.labs.userAgent.platform');
+
+goog.require('goog.labs.userAgent.util');
+goog.require('goog.string');
+
+
+/**
+ * @return {boolean} Whether the platform is Android.
+ */
+goog.labs.userAgent.platform.isAndroid = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Android');
+};
+
+
+/**
+ * @return {boolean} Whether the platform is iPod.
+ */
+goog.labs.userAgent.platform.isIpod = function() {
+  return goog.labs.userAgent.util.matchUserAgent('iPod');
+};
+
+
+/**
+ * @return {boolean} Whether the platform is iPhone.
+ */
+goog.labs.userAgent.platform.isIphone = function() {
+  return goog.labs.userAgent.util.matchUserAgent('iPhone') &&
+      !goog.labs.userAgent.util.matchUserAgent('iPod') &&
+      !goog.labs.userAgent.util.matchUserAgent('iPad');
+};
+
+
+/**
+ * @return {boolean} Whether the platform is iPad.
+ */
+goog.labs.userAgent.platform.isIpad = function() {
+  return goog.labs.userAgent.util.matchUserAgent('iPad');
+};
+
+
+/**
+ * @return {boolean} Whether the platform is iOS.
+ */
+goog.labs.userAgent.platform.isIos = function() {
+  return goog.labs.userAgent.platform.isIphone() ||
+      goog.labs.userAgent.platform.isIpad() ||
+      goog.labs.userAgent.platform.isIpod();
+};
+
+
+/**
+ * @return {boolean} Whether the platform is Mac.
+ */
+goog.labs.userAgent.platform.isMacintosh = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Macintosh');
+};
+
+
+/**
+ * Note: ChromeOS is not considered to be Linux as it does not report itself
+ * as Linux in the user agent string.
+ * @return {boolean} Whether the platform is Linux.
+ */
+goog.labs.userAgent.platform.isLinux = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Linux');
+};
+
+
+/**
+ * @return {boolean} Whether the platform is Windows.
+ */
+goog.labs.userAgent.platform.isWindows = function() {
+  return goog.labs.userAgent.util.matchUserAgent('Windows');
+};
+
+
+/**
+ * @return {boolean} Whether the platform is ChromeOS.
+ */
+goog.labs.userAgent.platform.isChromeOS = function() {
+  return goog.labs.userAgent.util.matchUserAgent('CrOS');
+};
+
+
+/**
+ * The version of the platform. We only determine the version for Windows,
+ * Mac, and Chrome OS. It doesn't make much sense on Linux. For Windows, we only
+ * look at the NT version. Non-NT-based versions (e.g. 95, 98, etc.) are given
+ * version 0.0.
+ *
+ * @return {string} The platform version or empty string if version cannot be
+ *     determined.
+ */
+goog.labs.userAgent.platform.getVersion = function() {
+  var userAgentString = goog.labs.userAgent.util.getUserAgent();
+  var version = '', re;
+  if (goog.labs.userAgent.platform.isWindows()) {
+    re = /Windows (?:NT|Phone) ([0-9.]+)/;
+    var match = re.exec(userAgentString);
+    if (match) {
+      version = match[1];
+    } else {
+      version = '0.0';
+    }
+  } else if (goog.labs.userAgent.platform.isIos()) {
+    re = /(?:iPhone|iPod|iPad|CPU)\s+OS\s+(\S+)/;
+    var match = re.exec(userAgentString);
+    // Report the version as x.y.z and not x_y_z
+    version = match && match[1].replace(/_/g, '.');
+  } else if (goog.labs.userAgent.platform.isMacintosh()) {
+    re = /Mac OS X ([0-9_.]+)/;
+    var match = re.exec(userAgentString);
+    // Note: some old versions of Camino do not report an OSX version.
+    // Default to 10.
+    version = match ? match[1].replace(/_/g, '.') : '10';
+  } else if (goog.labs.userAgent.platform.isAndroid()) {
+    re = /Android\s+([^\);]+)(\)|;)/;
+    var match = re.exec(userAgentString);
+    version = match && match[1];
+  } else if (goog.labs.userAgent.platform.isChromeOS()) {
+    re = /(?:CrOS\s+(?:i686|x86_64)\s+([0-9.]+))/;
+    var match = re.exec(userAgentString);
+    version = match && match[1];
+  }
+  return version || '';
+};
+
+
+/**
+ * @param {string|number} version The version to check.
+ * @return {boolean} Whether the browser version is higher or the same as the
+ *     given version.
+ */
+goog.labs.userAgent.platform.isVersionOrHigher = function(version) {
+  return goog.string.compareVersions(
+             goog.labs.userAgent.platform.getVersion(), version) >= 0;
+};
diff --git a/assets/viz/2/goog/labs/useragent/util.js b/assets/viz/2/goog/labs/useragent/util.js
new file mode 100644
index 0000000..caa3407
--- /dev/null
+++ b/assets/viz/2/goog/labs/useragent/util.js
@@ -0,0 +1,147 @@
+// 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 Utilities used by goog.labs.userAgent tools. These functions
+ * should not be used outside of goog.labs.userAgent.*.
+ *
+ *
+ * @author nnaze@google.com (Nathan Naze)
+ */
+
+goog.provide('goog.labs.userAgent.util');
+
+goog.require('goog.string');
+
+
+/**
+ * Gets the native userAgent string from navigator if it exists.
+ * If navigator or navigator.userAgent string is missing, returns an empty
+ * string.
+ * @return {string}
+ * @private
+ */
+goog.labs.userAgent.util.getNativeUserAgentString_ = function() {
+  var navigator = goog.labs.userAgent.util.getNavigator_();
+  if (navigator) {
+    var userAgent = navigator.userAgent;
+    if (userAgent) {
+      return userAgent;
+    }
+  }
+  return '';
+};
+
+
+/**
+ * Getter for the native navigator.
+ * This is a separate function so it can be stubbed out in testing.
+ * @return {Navigator}
+ * @private
+ */
+goog.labs.userAgent.util.getNavigator_ = function() {
+  return goog.global.navigator;
+};
+
+
+/**
+ * A possible override for applications which wish to not check
+ * navigator.userAgent but use a specified value for detection instead.
+ * @private {string}
+ */
+goog.labs.userAgent.util.userAgent_ =
+    goog.labs.userAgent.util.getNativeUserAgentString_();
+
+
+/**
+ * Applications may override browser detection on the built in
+ * navigator.userAgent object by setting this string. Set to null to use the
+ * browser object instead.
+ * @param {?string=} opt_userAgent The User-Agent override.
+ */
+goog.labs.userAgent.util.setUserAgent = function(opt_userAgent) {
+  goog.labs.userAgent.util.userAgent_ =
+      opt_userAgent || goog.labs.userAgent.util.getNativeUserAgentString_();
+};
+
+
+/**
+ * @return {string} The user agent string.
+ */
+goog.labs.userAgent.util.getUserAgent = function() {
+  return goog.labs.userAgent.util.userAgent_;
+};
+
+
+/**
+ * @param {string} str
+ * @return {boolean} Whether the user agent contains the given string, ignoring
+ *     case.
+ */
+goog.labs.userAgent.util.matchUserAgent = function(str) {
+  var userAgent = goog.labs.userAgent.util.getUserAgent();
+  return goog.string.contains(userAgent, str);
+};
+
+
+/**
+ * @param {string} str
+ * @return {boolean} Whether the user agent contains the given string.
+ */
+goog.labs.userAgent.util.matchUserAgentIgnoreCase = function(str) {
+  var userAgent = goog.labs.userAgent.util.getUserAgent();
+  return goog.string.caseInsensitiveContains(userAgent, str);
+};
+
+
+/**
+ * Parses the user agent into tuples for each section.
+ * @param {string} userAgent
+ * @return {!Array<!Array<string>>} Tuples of key, version, and the contents
+ *     of the parenthetical.
+ */
+goog.labs.userAgent.util.extractVersionTuples = function(userAgent) {
+  // Matches each section of a user agent string.
+  // Example UA:
+  // Mozilla/5.0 (iPad; U; CPU OS 3_2_1 like Mac OS X; en-us)
+  // AppleWebKit/531.21.10 (KHTML, like Gecko) Mobile/7B405
+  // This has three version tuples: Mozilla, AppleWebKit, and Mobile.
+
+  var versionRegExp = new RegExp(
+      // Key. Note that a key may have a space.
+      // (i.e. 'Mobile Safari' in 'Mobile Safari/5.0')
+      '(\\w[\\w ]+)' +
+
+          '/' +                // slash
+          '([^\\s]+)' +        // version (i.e. '5.0b')
+          '\\s*' +             // whitespace
+          '(?:\\((.*?)\\))?',  // parenthetical info. parentheses not matched.
+      'g');
+
+  var data = [];
+  var match;
+
+  // Iterate and collect the version tuples.  Each iteration will be the
+  // next regex match.
+  while (match = versionRegExp.exec(userAgent)) {
+    data.push([
+      match[1],  // key
+      match[2],  // value
+      // || undefined as this is not undefined in IE7 and IE8
+      match[3] || undefined  // info
+    ]);
+  }
+
+  return data;
+};