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2026-06-25 21:30:32 +00:00
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+/**
+ * @license
+ * Copyright The Closure Library Authors.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @fileoverview Closure user device detection (based on user agent).
+ * @see http://en.wikipedia.org/wiki/User_agent
+ * For more information on browser brand, platform, or engine see the other
+ * sub-namespaces in goog.labs.userAgent (browser, platform, and engine).
+ */
+
+goog.provide('goog.labs.userAgent.device');
+
+goog.require('goog.labs.userAgent.util');
+
+/**
+ * Currently we detect the iPhone, iPod and Android mobiles (devices that have
+ * both Android and Mobile in the user agent string).
+ *
+ * @return {boolean} Whether the user is using a mobile device.
+ */
+goog.labs.userAgent.device.isMobile = function() {
+  'use strict';
+  if (goog.labs.userAgent.util.ASSUME_CLIENT_HINTS_SUPPORT ||
+      goog.labs.userAgent.util.getUserAgentData()) {
+    return goog.labs.userAgent.util.getUserAgentData().mobile;
+  }
+  return !goog.labs.userAgent.device.isTablet() &&
+      (goog.labs.userAgent.util.matchUserAgent('iPod') ||
+       goog.labs.userAgent.util.matchUserAgent('iPhone') ||
+       goog.labs.userAgent.util.matchUserAgent('Android') ||
+       goog.labs.userAgent.util.matchUserAgent('IEMobile'));
+};
+
+
+/**
+ * Currently we detect Kindle Fire, iPad, and Android tablets (devices that have
+ * Android but not Mobile in the user agent string).
+ *
+ * @return {boolean} Whether the user is using a tablet.
+ */
+goog.labs.userAgent.device.isTablet = function() {
+  'use strict';
+  if (goog.labs.userAgent.util.ASSUME_CLIENT_HINTS_SUPPORT ||
+      goog.labs.userAgent.util.getUserAgentData()) {
+    return !goog.labs.userAgent.util.getUserAgentData().mobile &&
+        (goog.labs.userAgent.util.matchUserAgent('iPad') ||
+         goog.labs.userAgent.util.matchUserAgent('Android') ||
+         goog.labs.userAgent.util.matchUserAgent('Silk'));
+  }
+  return goog.labs.userAgent.util.matchUserAgent('iPad') ||
+      (goog.labs.userAgent.util.matchUserAgent('Android') &&
+       !goog.labs.userAgent.util.matchUserAgent('Mobile')) ||
+      goog.labs.userAgent.util.matchUserAgent('Silk');
+};
+
+
+/**
+ * @return {boolean} Whether the user is using a desktop computer (which we
+ *     assume to be the case if they are not using either a mobile or tablet
+ *     device).
+ */
+goog.labs.userAgent.device.isDesktop = function() {
+  'use strict';
+  return !goog.labs.userAgent.device.isMobile() &&
+      !goog.labs.userAgent.device.isTablet();
+};