UI: Introduce active entity info used by widget header actions. Update Timeserie…

…s card widget to provide active entity from selected tab.

@@ -138,7 +138,7 @@ export default function WidgetController($scope, $state, $timeout, $window, $ele
         headerAction.icon = descriptor.icon;
         headerAction.descriptor = descriptor;
         headerAction.onAction = function($event) {
-            var entityInfo = getFirstEntityInfo();
+            var entityInfo = getActiveEntityInfo();
             var entityId = entityInfo ? entityInfo.entityId : null;
             var entityName = entityInfo ? entityInfo.entityName : null;
             handleWidgetAction($event, this.descriptor, entityId, entityName);
@@ -502,13 +502,15 @@ export default function WidgetController($scope, $state, $timeout, $window, $ele
         }
     }
 
-    function getFirstEntityInfo() {
-        var entityInfo;
-        for (var id in widgetContext.subscriptions) {
-            var subscription = widgetContext.subscriptions[id];
-            entityInfo = subscription.getFirstEntityInfo();
-            if (entityInfo) {
-                break;
+    function getActiveEntityInfo() {
+        var entityInfo = widgetContext.activeEntityInfo;
+        if (!entityInfo) {
+            for (var id in widgetContext.subscriptions) {
+                var subscription = widgetContext.subscriptions[id];
+                entityInfo = subscription.getFirstEntityInfo();
+                if (entityInfo) {
+                    break;
+                }
             }
         }
         return entityInfo;

@@ -44,7 +44,7 @@ function TimeseriesTableWidget() {
 }
 
 /*@ngInject*/
-function TimeseriesTableWidgetController($element, $scope, $filter, $timeout) {
+function TimeseriesTableWidgetController($element, $scope, $filter, $timeout, types) {
     var vm = this;
     let dateFormatFilter = 'yyyy-MM-dd HH:mm:ss';
 
@@ -228,9 +228,29 @@ function TimeseriesTableWidgetController($element, $scope, $filter, $timeout) {
     $scope.$watch('vm.sourceIndex', function(newIndex, oldIndex) {
         if (newIndex != oldIndex) {
             updateSourceData(vm.sources[vm.sourceIndex]);
+            updateActiveEntityInfo();
         }
     });
 
+    function updateActiveEntityInfo() {
+        var source = vm.sources[vm.sourceIndex];
+        var activeEntityInfo = null;
+        if (source) {
+            var datasource = source.datasource;
+            if (datasource.type === types.datasourceType.entity &&
+                datasource.entityType && datasource.entityId) {
+                activeEntityInfo = {
+                    entityId: {
+                        entityType: datasource.entityType,
+                        id: datasource.entityId
+                    },
+                    entityName: datasource.entityName
+                };
+            }
+        }
+        vm.ctx.activeEntityInfo = activeEntityInfo;
+    }
+
     function updateDatasources() {
         vm.sources = [];
         vm.sourceIndex = 0;
@@ -314,6 +334,7 @@ function TimeseriesTableWidgetController($element, $scope, $filter, $timeout) {
                 vm.sources.push(source);
             }
         }
+        updateActiveEntityInfo();
     }
 
     function updatePage(source) {