feat: reopen closed tabs (deephaven#1912)

- Add deephaven#1785 
  - Add keyboard shortcut (Alt+Shift+A) to reopen last closed tab

Author: wusteven815

packages/code-studio/src/main/AppMainContainer.tsx

@@ -234,6 +234,13 @@ export class AppMainContainer extends Component<
           shortcut: IRIS_GRID_SHORTCUTS.TABLE.CLEAR_ALL_FILTERS,
           isGlobal: true,
         },
+        {
+          action: () => {
+            this.sendReopenLast();
+          },
+          shortcut: GLOBAL_SHORTCUTS.REOPEN_CLOSED_PANEL,
+          isGlobal: true,
+        },
         {
           action: () => {
             log.debug('Consume unhandled save shortcut');
@@ -402,6 +409,10 @@ export class AppMainContainer extends Component<
     this.emitLayoutEvent(InputFilterEvent.CLEAR_ALL_FILTERS);
   }
 
+  sendReopenLast(): void {
+    this.emitLayoutEvent(PanelEvent.REOPEN_LAST);
+  }
+
   emitLayoutEvent(event: string, ...args: unknown[]): void {
     const { activeTabKey } = this.state;
     const layout = this.dashboardLayouts.get(activeTabKey);

packages/components/src/shortcuts/GlobalShortcuts.ts

@@ -30,6 +30,13 @@ const GLOBAL_SHORTCUTS = {
     macShortcut: [MODIFIER.CMD, KEY.A],
     isEditable: false,
   }),
+  REOPEN_CLOSED_PANEL: ShortcutRegistry.createAndAdd({
+    id: 'GLOBAL.REOPEN_CLOSED_PANEL',
+    name: 'Re-open Closed Panel',
+    shortcut: [MODIFIER.ALT, MODIFIER.SHIFT, KEY.T],
+    macShortcut: [MODIFIER.OPTION, MODIFIER.SHIFT, KEY.T],
+    isEditable: true,
+  }),
   LINKER: ShortcutRegistry.createAndAdd({
     id: 'GLOBAL.LINKER',
     name: 'Linker',

packages/dashboard/src/PanelEvent.ts

@@ -32,6 +32,9 @@ export default Object.freeze({
   // Panel was re-opened from a dehydrated state
   REOPEN: 'PanelEvent.REOPEN',
 
+  // Reopen last closed panel
+  REOPEN_LAST: 'PanelEvent.REOPEN_LAST',
+
   // Panel was deleted
   DELETE: 'PanelEvent.DELETE',
 

packages/dashboard/src/PanelManager.ts

@@ -82,6 +82,7 @@ class PanelManager {
     // and PanelEvent.CLOSED for cleanup (delete links, add panel to closed panels list, etc)
     this.handleUnmount = this.handleUnmount.bind(this);
     this.handleReopen = this.handleReopen.bind(this);
+    this.handleReopenLast = this.handleReopenLast.bind(this);
     this.handleDeleted = this.handleDeleted.bind(this);
     this.handleClosed = this.handleClosed.bind(this);
     this.handleControlClose = this.handleControlClose.bind(this);
@@ -106,6 +107,7 @@ class PanelManager {
     eventHub.on(PanelEvent.MOUNT, this.handleMount);
     eventHub.on(PanelEvent.UNMOUNT, this.handleUnmount);
     eventHub.on(PanelEvent.REOPEN, this.handleReopen);
+    eventHub.on(PanelEvent.REOPEN_LAST, this.handleReopenLast);
     eventHub.on(PanelEvent.DELETE, this.handleDeleted);
     eventHub.on(PanelEvent.CLOSED, this.handleClosed);
     eventHub.on(PanelEvent.CLOSE, this.handleControlClose);
@@ -118,6 +120,7 @@ class PanelManager {
     eventHub.off(PanelEvent.MOUNT, this.handleMount);
     eventHub.off(PanelEvent.UNMOUNT, this.handleUnmount);
     eventHub.off(PanelEvent.REOPEN, this.handleReopen);
+    eventHub.off(PanelEvent.REOPEN_LAST, this.handleReopenLast);
     eventHub.off(PanelEvent.DELETE, this.handleDeleted);
     eventHub.off(PanelEvent.CLOSED, this.handleClosed);
     eventHub.off(PanelEvent.CLOSE, this.handleControlClose);
@@ -291,6 +294,11 @@ class PanelManager {
     LayoutUtils.openComponent({ root, config, replaceConfig });
   }
 
+  handleReopenLast(): void {
+    if (this.closed.length === 0) return;
+    this.handleReopen(this.closed[this.closed.length - 1]);
+  }
+
   handleDeleted(panelConfig: ClosedPanel): void {
     log.debug2('Deleted:', panelConfig);