Improve vscode tab API

packages/core/src/browser/frontend-application-module.ts

@@ -141,6 +141,7 @@ import { AdditionalViewsMenuWidget, AdditionalViewsMenuWidgetFactory } from './s
 import { LanguageIconLabelProvider } from './language-icon-provider';
 import { bindTreePreferences } from './tree';
 import { OpenWithService } from './open-with-service';
+import { ViewColumnService } from './shell/view-column-service';
 
 export { bindResourceProvider, bindMessageService, bindPreferenceService };
 
@@ -462,4 +463,6 @@ export const frontendApplicationModule = new ContainerModule((bind, _unbind, _is
     bind(FrontendApplicationContribution).toService(StylingService);
 
     bind(SecondaryWindowHandler).toSelf().inSingletonScope();
+
+    bind(ViewColumnService).toSelf().inSingletonScope();
 });

packages/plugin-ext/src/main/browser/view-column-service.ts → packages/core/src/browser/shell/view-column-service.ts

@@ -14,11 +14,11 @@
 // SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0
 // *****************************************************************************
 
-import { injectable, inject } from '@theia/core/shared/inversify';
-import { Emitter, Event } from '@theia/core/lib/common/event';
-import { ApplicationShell } from '@theia/core/lib/browser/shell/application-shell';
-import { toArray } from '@theia/core/shared/@phosphor/algorithm';
-import { TabBar, Widget } from '@theia/core/shared/@phosphor/widgets';
+import { injectable, inject } from 'inversify';
+import { Emitter, Event } from '../../common/event';
+import { ApplicationShell } from './application-shell';
+import { toArray } from '@phosphor/algorithm';
+import { TabBar, Widget } from '@phosphor/widgets';
 
 @injectable()
 export class ViewColumnService {

packages/plugin-ext/src/main/browser/plugin-ext-frontend-module.ts

@@ -47,7 +47,6 @@ import { PluginDebugService } from './debug/plugin-debug-service';
 import { DebugService } from '@theia/debug/lib/common/debug-service';
 import { PluginSharedStyle } from './plugin-shared-style';
 import { SelectionProviderCommandContribution } from './selection-provider-command';
-import { ViewColumnService } from './view-column-service';
 import { ViewContextKeyService } from './view/view-context-key-service';
 import { PluginViewWidget, PluginViewWidgetIdentifier } from './view/plugin-view-widget';
 import { TreeViewWidgetOptions, VIEW_ITEM_CONTEXT_MENU, PluginTree, TreeViewWidget, PluginTreeModel } from './view/tree-view-widget';
@@ -244,8 +243,6 @@ export default new ContainerModule((bind, unbind, isBound, rebind) => {
     bind(PluginDebugSessionContributionRegistry).toSelf().inSingletonScope();
     rebind(DebugSessionContributionRegistry).toService(PluginDebugSessionContributionRegistry);
 
-    bind(ViewColumnService).toSelf().inSingletonScope();
-
     bind(CommentsService).to(PluginCommentService).inSingletonScope();
     bind(CommentingRangeDecorator).toSelf().inSingletonScope();
     bind(CommentsContribution).toSelf().inSingletonScope();

packages/plugin-ext/src/main/browser/tabs/tabs-main.ts

@@ -24,6 +24,8 @@ import { MonacoDiffEditor } from '@theia/monaco/lib/browser/monaco-diff-editor';
 import { toUriComponents } from '../hierarchy/hierarchy-types-converters';
 import { TerminalWidget } from '@theia/terminal/lib/browser/base/terminal-widget';
 import { DisposableCollection } from '@theia/core';
+import { NotebookEditorWidget } from '@theia/notebook/lib/browser';
+import { ViewColumnService } from '@theia/core/lib/browser/shell/view-column-service';
 
 interface TabInfo {
     tab: TabDto;
@@ -46,6 +48,14 @@ export class TabsMainImpl implements TabsMain, Disposable {
     private currentActiveGroup: TabGroupDto;
 
     private tabGroupChanged: boolean = false;
+    private viewColumnService: ViewColumnService;
+
+    private readonly defaultTabGroup: TabGroupDto = {
+        groupId: 0,
+        tabs: [],
+        isActive: true,
+        viewColumn: 0
+    };
 
     constructor(
         rpc: RPCProtocol,
@@ -54,6 +64,7 @@ export class TabsMainImpl implements TabsMain, Disposable {
         this.proxy = rpc.getProxy(MAIN_RPC_CONTEXT.TABS_EXT);
 
         this.applicationShell = container.get(ApplicationShell);
+        this.viewColumnService = container.get(ViewColumnService);
         this.createTabsModel();
 
         const tabBars = this.applicationShell.mainPanel.tabBars();
@@ -100,15 +111,20 @@ export class TabsMainImpl implements TabsMain, Disposable {
     }
 
     protected createTabsModel(): void {
+        if (this.applicationShell.mainAreaTabBars.length === 0) {
+            this.proxy.$acceptEditorTabModel([this.defaultTabGroup]);
+            return;
+        }
         const newTabGroupModel = new Map<TabBar<Widget>, TabGroupDto>();
         this.tabInfoLookup.clear();
         this.disposableTabBarListeners.dispose();
-        this.applicationShell.mainAreaTabBars.forEach(tabBar => {
-            this.attachListenersToTabBar(tabBar);
-            const groupDto = this.createTabGroupDto(tabBar);
-            tabBar.titles.forEach((title, index) => this.tabInfoLookup.set(title, { group: groupDto, tab: groupDto.tabs[index], tabIndex: index }));
-            newTabGroupModel.set(tabBar, groupDto);
-        });
+        this.applicationShell.mainAreaTabBars
+            .forEach((tabBar, i) => {
+                this.attachListenersToTabBar(tabBar);
+                const groupDto = this.createTabGroupDto(tabBar, i);
+                tabBar.titles.forEach((title, index) => this.tabInfoLookup.set(title, { group: groupDto, tab: groupDto.tabs[index], tabIndex: index }));
+                newTabGroupModel.set(tabBar, groupDto);
+            });
         if (newTabGroupModel.size > 0 && Array.from(newTabGroupModel.values()).indexOf(this.currentActiveGroup) < 0) {
             this.currentActiveGroup = this.tabInfoLookup.get(this.applicationShell.mainPanel.currentTitle!)?.group ?? newTabGroupModel.values().next().value;
             this.currentActiveGroup.isActive = true;
@@ -134,15 +150,17 @@ export class TabsMainImpl implements TabsMain, Disposable {
         return `${groupId}~${tabTitle.owner.id}`;
     }
 
-    protected createTabGroupDto(tabBar: TabBar<Widget>): TabGroupDto {
-        const oldDto = this.tabGroupModel.get(tabBar);
+    protected createTabGroupDto(tabBar: TabBar<Widget>, index: number): TabGroupDto {
+        const oldDto = index === 0 ? this.defaultTabGroup : this.tabGroupModel.get(tabBar);
         const groupId = oldDto?.groupId ?? this.groupIdCounter++;
         const tabs = tabBar.titles.map(title => this.createTabDto(title, groupId));
+        const viewColumn = this.viewColumnService.getViewColumn(tabBar.id)
+            ?? this.applicationShell.allTabBars.indexOf(tabBar);
         return {
             groupId,
             tabs,
             isActive: false,
-            viewColumn: 1
+            viewColumn
         };
     }
 
@@ -182,6 +200,12 @@ export class TabsMainImpl implements TabsMain, Disposable {
             return {
                 kind: TabInputKind.TerminalEditorInput
             };
+        } else if (widget instanceof NotebookEditorWidget) {
+            return {
+                kind: TabInputKind.NotebookInput,
+                notebookType: widget.notebookType,
+                uri: toUriComponents(widget.model?.uri.toString() ?? '')
+            };
         }
 
         return { kind: TabInputKind.UnknownInput };
@@ -232,6 +256,9 @@ export class TabsMainImpl implements TabsMain, Disposable {
         }
         const oldTabDto = tabInfo.tab;
         const newTabDto = this.createTabDto(title, tabInfo.group.groupId);
+        if (!oldTabDto.isActive && newTabDto.isActive) {
+            this.currentActiveGroup.tabs.filter(tab => tab.isActive).forEach(tab => tab.isActive = false);
+        }
         if (newTabDto.isActive && !tabInfo.group.isActive) {
             tabInfo.group.isActive = true;
             this.currentActiveGroup.isActive = false;

packages/plugin-ext/src/main/browser/webviews-main.ts

@@ -23,7 +23,7 @@ import { ViewBadge, WebviewOptions, WebviewPanelOptions, WebviewPanelShowOptions
 import { ApplicationShell } from '@theia/core/lib/browser/shell/application-shell';
 import { WebviewWidget, WebviewWidgetIdentifier } from './webview/webview';
 import { Disposable, DisposableCollection } from '@theia/core/lib/common/disposable';
-import { ViewColumnService } from './view-column-service';
+import { ViewColumnService } from '@theia/core/lib/browser/shell/view-column-service';
 import { WidgetManager } from '@theia/core/lib/browser/widget-manager';
 import { JSONExt } from '@theia/core/shared/@phosphor/coreutils';
 import { Mutable } from '@theia/core/lib/common/types';

packages/plugin-ext/src/plugin/tabs.ts

@@ -325,8 +325,13 @@ export class TabsExtImpl implements TabsExt {
                 this.activeGroupId = activeTabGroupId;
             }
         }
-        this.onDidChangeTabGroups.fire(Object.freeze({ opened, closed, changed }));
-        this.onDidChangeTabs.fire({ opened: tabsOpened, changed: [], closed: [] });
+
+        if (closed.length > 0 || opened.length > 0 || changed.length > 0) {
+            this.onDidChangeTabGroups.fire(Object.freeze({ opened, closed, changed }));
+        }
+        if (tabsOpened.length > 0) {
+            this.onDidChangeTabs.fire({ opened: tabsOpened, changed: [], closed: [] });
+        }
     }
 
     $acceptTabGroupUpdate(groupDto: TabGroupDto): void {