From 2df61998ab44ca0645cf7e19fa51e77dd83ccb18 Mon Sep 17 00:00:00 2001
From: Victor Woeltjen <victor.woeltjen@nasa.gov>
Date: Tue, 29 Dec 2015 12:43:46 -0800
Subject: [PATCH] [Mobile] Detect touch support

---
 platform/commonUI/mobile/src/AgentService.js     | 9 +++++++++
 platform/commonUI/mobile/src/DeviceClassifier.js | 1 +
 platform/commonUI/mobile/src/DeviceMatchers.js   | 3 +++
 platform/commonUI/mobile/src/MCTDevice.js        | 1 +
 4 files changed, 14 insertions(+)

diff --git a/platform/commonUI/mobile/src/AgentService.js b/platform/commonUI/mobile/src/AgentService.js
index 109520d8bd..3251950ff4 100644
--- a/platform/commonUI/mobile/src/AgentService.js
+++ b/platform/commonUI/mobile/src/AgentService.js
@@ -46,6 +46,7 @@ define(
             this.userAgent = userAgent;
             this.mobileName = matches[0];
             this.$window = $window;
+            this.touchEnabled = ($window.ontouchstart !== undefined);
         }
 
         /**
@@ -92,6 +93,14 @@ define(
             return !this.isPortrait();
         };
 
+        /**
+         * Check if the user's device supports a touch interface.
+         * @returns {boolean} true if touch is supported
+         */
+        AgentService.prototype.isTouch = function () {
+            return this.touchEnabled;
+        };
+
         /**
          * Check if the user agent matches a certain named device,
          * as indicated by checking for a case-insensitive substring
diff --git a/platform/commonUI/mobile/src/DeviceClassifier.js b/platform/commonUI/mobile/src/DeviceClassifier.js
index 881a3be191..ac275fa4d0 100644
--- a/platform/commonUI/mobile/src/DeviceClassifier.js
+++ b/platform/commonUI/mobile/src/DeviceClassifier.js
@@ -37,6 +37,7 @@ define(
          * * `desktop`: Non-mobile devices.
          * * `portrait`: Devices in a portrait-style orientation.
          * * `landscape`: Devices in a landscape-style orientation.
+         * * `touch`: Device supports touch events.
          *
          * @param {platform/commonUI/mobile.AgentService} agentService
          *        the service used to examine the user agent
diff --git a/platform/commonUI/mobile/src/DeviceMatchers.js b/platform/commonUI/mobile/src/DeviceMatchers.js
index 363662a73e..9292625a79 100644
--- a/platform/commonUI/mobile/src/DeviceMatchers.js
+++ b/platform/commonUI/mobile/src/DeviceMatchers.js
@@ -52,6 +52,9 @@ define(function () {
         },
         landscape: function (agentService) {
             return agentService.isLandscape();
+        },
+        touch: function (agentService) {
+            return agentService.isTouch();
         }
     };
 });
\ No newline at end of file
diff --git a/platform/commonUI/mobile/src/MCTDevice.js b/platform/commonUI/mobile/src/MCTDevice.js
index bcecee3f28..704f665a22 100644
--- a/platform/commonUI/mobile/src/MCTDevice.js
+++ b/platform/commonUI/mobile/src/MCTDevice.js
@@ -47,6 +47,7 @@ define(
          * * `desktop`: Non-mobile devices.
          * * `portrait`: Devices in a portrait-style orientation.
          * * `landscape`: Devices in a landscape-style orientation.
+         * * `touch`: Device supports touch events.
          *
          * @param {AgentService} agentService used to detect device type
          *        based on information about the user agent