Enabled the ability to close the home tab (#1765)

images/Home_16.svg

@@ -0,0 +1,3 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M7.31299 1.26164C7.69849 0.897163 8.30151 0.897163 8.68701 1.26164L13.5305 5.84098C13.8302 6.12431 14 6.51853 14 6.93094V12.5002C14 13.3286 13.3284 14.0002 12.5 14.0002H10.5C9.67157 14.0002 9 13.3286 9 12.5002V10.0002C9 9.72407 8.77614 9.50021 8.5 9.50021H7.5C7.22386 9.50021 7 9.72407 7 10.0002V12.5002C7 13.3286 6.32843 14.0002 5.5 14.0002H3.5C2.67157 14.0002 2 13.3286 2 12.5002V6.93094C2 6.51853 2.1698 6.12431 2.46948 5.84098L7.31299 1.26164ZM8 1.98828L3.15649 6.56762C3.0566 6.66207 3 6.79347 3 6.93094V12.5002C3 12.7763 3.22386 13.0002 3.5 13.0002H5.5C5.77614 13.0002 6 12.7763 6 12.5002V10.0002C6 9.17179 6.67157 8.50022 7.5 8.50022H8.5C9.32843 8.50022 10 9.17179 10 10.0002V12.5002C10 12.7763 10.2239 13.0002 10.5 13.0002H12.5C12.7761 13.0002 13 12.7763 13 12.5002V6.93094C13 6.79347 12.9434 6.66207 12.8435 6.56762L8 1.98828Z" fill="#0078D4" />
+</svg>

src/Explorer/Menus/CommandBar/CommandBarComponentButtonFactory.tsx

@@ -1,3 +1,4 @@
+import { ReactTabKind, useTabs } from "hooks/useTabs";
 import * as React from "react";
 import AddCollectionIcon from "../../../../images/AddCollection.svg";
 import AddDatabaseIcon from "../../../../images/AddDatabase.svg";
@@ -8,6 +9,7 @@ import AddUdfIcon from "../../../../images/AddUdf.svg";
 import BrowseQueriesIcon from "../../../../images/BrowseQuery.svg";
 import CosmosTerminalIcon from "../../../../images/Cosmos-Terminal.svg";
 import FeedbackIcon from "../../../../images/Feedback-Command.svg";
+import HomeIcon from "../../../../images/Home_16.svg";
 import HostedTerminalIcon from "../../../../images/Hosted-Terminal.svg";
 import OpenQueryFromDiskIcon from "../../../../images/OpenQueryFromDisk.svg";
 import GitHubIcon from "../../../../images/github.svg";
@@ -56,6 +58,9 @@ export function createStaticCommandBarButtons(
     }
   };
 
+  const homeBtn = createHomeButton();
+  buttons.push(homeBtn);
+
   if (configContext.platform !== Platform.Fabric) {
     const newCollectionBtn = createNewCollectionGroup(container);
     buttons.push(newCollectionBtn);
@@ -285,6 +290,18 @@ function createNewCollectionGroup(container: Explorer): CommandButtonComponentPr
   };
 }
 
+function createHomeButton(): CommandButtonComponentProps {
+  const label = "Home";
+  return {
+    iconSrc: HomeIcon,
+    iconAlt: label,
+    onCommandClick: () => useTabs.getState().openAndActivateReactTab(ReactTabKind.Home),
+    commandButtonLabel: label,
+    hasPopup: false,
+    ariaLabel: label,
+  };
+}
+
 function createOpenSynapseLinkDialogButton(container: Explorer): CommandButtonComponentProps {
   if (configContext.platform === Platform.Emulator) {
     return undefined;

src/Explorer/Tabs/Tabs.tsx

@@ -182,11 +182,9 @@ function TabNav({ tab, active, tabKind }: { tab?: Tab; active: boolean; tabKind?
             )}
           </span>
           <span className="tabNavText">{useObservable(tab?.tabTitle || getReactTabTitle())}</span>
-          {tabKind !== ReactTabKind.Home && (
           <span className="tabIconSection">
             <CloseButton tab={tab} active={active} hovering={hovering} tabKind={tabKind} />
           </span>
-          )}
         </div>
       </span>
     </li>

src/hooks/useTabs.ts

@@ -105,7 +105,7 @@ export const useTabs: UseStore<TabsState> = create((set, get) => ({
       return true;
     });
     if (updatedTabs.length === 0 && configContext.platform !== Platform.Fabric) {
-      set({ activeTab: undefined, activeReactTab: ReactTabKind.Home });
+      set({ activeTab: undefined, activeReactTab: undefined });
     }
 
     if (tab.tabId === activeTab.tabId && tabIndex !== -1) {
@@ -143,7 +143,7 @@ export const useTabs: UseStore<TabsState> = create((set, get) => ({
       });
 
       if (get().openedTabs.length === 0 && configContext.platform !== Platform.Fabric) {
-        set({ activeTab: undefined, activeReactTab: ReactTabKind.Home });
+        set({ activeTab: undefined, activeReactTab: undefined });
       }
     }
   },