Remove vs dependency in common

Fixes #5631

addons/addon-webgl/src/DevicePixelObserver.ts

@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { toDisposable, IDisposable } from 'vs/base/common/lifecycle';
+import { toDisposable, IDisposable } from 'common/Lifecycle';
 
 export function observeDevicePixelDimensions(element: HTMLElement, parentWindow: Window & typeof globalThis, callback: (deviceWidth: number, deviceHeight: number) => void): IDisposable {
   // Observe any resizes to the element and extract the actual pixel size of the element if the

addons/addon-webgl/src/GlyphRenderer.ts

@@ -5,7 +5,7 @@
 import { TextureAtlas } from './TextureAtlas';
 import { IRenderDimensions } from 'browser/renderer/shared/Types';
 import { NULL_CELL_CODE } from 'common/buffer/Constants';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { Terminal } from '@xterm/xterm';
 import { IRenderModel, IWebGL2RenderingContext, IWebGLVertexArrayObject, type IRasterizedGlyph, type ITextureAtlas } from './Types';
 import { createProgram, GLTexture, PROJECTION_MATRIX } from './WebglUtils';

addons/addon-webgl/src/RectangleRenderer.ts

@@ -7,7 +7,7 @@ import { IRenderDimensions } from 'browser/renderer/shared/Types';
 import { IThemeService } from 'browser/services/Services';
 import { ReadonlyColorSet } from 'browser/Types';
 import { Attributes, FgFlags } from 'common/buffer/Constants';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { IColor } from 'common/Types';
 import { Terminal } from '@xterm/xterm';
 import { RENDER_MODEL_BG_OFFSET, RENDER_MODEL_FG_OFFSET, RENDER_MODEL_INDICIES_PER_CELL } from './RenderModel';

addons/addon-webgl/src/TextureAtlas.ts

@@ -15,7 +15,7 @@ import { IColor } from 'common/Types';
 import { AttributeData } from 'common/buffer/AttributeData';
 import { Attributes, DEFAULT_COLOR, DEFAULT_EXT, UnderlineStyle } from 'common/buffer/Constants';
 import { IUnicodeService } from 'common/services/Services';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 
 /**
  * A shared object which is used to draw nothing for a particular cell.

addons/addon-webgl/src/Types.ts

@@ -7,7 +7,7 @@ import { FontWeight } from '@xterm/xterm';
 import { IColorSet } from 'browser/Types';
 import { ISelectionRenderModel } from 'browser/renderer/shared/Types';
 import { CursorInactiveStyle, CursorStyle, type IDisposable } from 'common/Types';
-import type { Event } from 'vs/base/common/event';
+import type { Event } from 'common/Event';
 
 export interface IRenderModel {
   cells: Uint32Array;

addons/addon-webgl/src/WebglAddon.ts

@@ -7,13 +7,13 @@ import type { ITerminalAddon, Terminal } from '@xterm/xterm';
 import type { IWebglAddonOptions, WebglAddon as IWebglApi } from '@xterm/addon-webgl';
 import { ICharacterJoinerService, ICharSizeService, ICoreBrowserService, IRenderService, IThemeService } from 'browser/services/Services';
 import { ITerminal } from 'browser/Types';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { getSafariVersion, isSafari } from 'common/Platform';
 import { ICoreService, IDecorationService, ILogService, IOptionsService } from 'common/services/Services';
 import { IWebGL2RenderingContext } from './Types';
 import { WebglRenderer } from './WebglRenderer';
 import { setTraceLogger } from 'common/services/LogService';
-import { Emitter, Event } from 'vs/base/common/event';
+import { Emitter, Event } from 'common/Event';
 
 export class WebglAddon extends Disposable implements ITerminalAddon , IWebglApi {
   private _terminal?: Terminal;

addons/addon-webgl/src/WebglRenderer.ts

@@ -22,9 +22,9 @@ import { COMBINED_CHAR_BIT_MASK, RENDER_MODEL_BG_OFFSET, RENDER_MODEL_EXT_OFFSET
 import { IWebGL2RenderingContext, type ITextureAtlas } from './Types';
 import { LinkRenderLayer } from './renderLayer/LinkRenderLayer';
 import { IRenderLayer } from './renderLayer/Types';
-import { Emitter, Event } from 'vs/base/common/event';
+import { Emitter, Event } from 'common/Event';
 import { addDisposableListener } from 'vs/base/browser/dom';
-import { combinedDisposable, Disposable, MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';
+import { combinedDisposable, Disposable, MutableDisposable, toDisposable } from 'common/Lifecycle';
 import { createRenderDimensions } from 'browser/renderer/shared/RendererUtils';
 
 export class WebglRenderer extends Disposable implements IRenderer {

addons/addon-webgl/src/renderLayer/BaseRenderLayer.ts

@@ -7,7 +7,7 @@ import { ReadonlyColorSet } from 'browser/Types';
 import { acquireTextureAtlas } from '../CharAtlasCache';
 import { IRenderDimensions } from 'browser/renderer/shared/Types';
 import { ICoreBrowserService, IThemeService } from 'browser/services/Services';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { CellData } from 'common/buffer/CellData';
 import { IOptionsService } from 'common/services/Services';
 import { Terminal } from '@xterm/xterm';

headless/package.json

@@ -1,17 +1,15 @@
 {
  "name": "@xterm/headless",
  "description": "A headless terminal component that runs in Node.js",
- "version": "5.5.0",
+ "version": "6.0.0",
  "main": "lib-headless/xterm-headless.js",
- "module": "lib-headless/xterm-headless.mjs",
+ "module": "lib/xterm.mjs",
  "types": "typings/xterm-headless.d.ts",
- "exports": {
-  "types": "./typings/xterm-headless.d.ts",
-  "import": "./lib-headless/xterm-headless.mjs",
-  "require": "./lib-headless/xterm-headless.js"
- },
  "repository": "https://github.com/xtermjs/xterm.js",
  "license": "MIT",
+ "workspaces": [
+  "addons/*"
+ ],
  "keywords": [
   "cli",
   "command-line",
@@ -27,4 +25,4 @@
   "webgl",
   "xterm"
  ]
-}
+}

src/browser/AccessibilityManager.ts

@@ -6,7 +6,7 @@
 import * as Strings from 'browser/LocalizableStrings';
 import { ITerminal, IRenderDebouncer } from 'browser/Types';
 import { TimeBasedDebouncer } from 'browser/TimeBasedDebouncer';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { ICoreBrowserService, IRenderService } from 'browser/services/Services';
 import { IBuffer } from 'common/buffer/Types';
 import { IInstantiationService } from 'common/services/Services';

src/browser/CoreBrowserTerminal.ts

@@ -55,9 +55,9 @@ import { IDecorationService } from 'common/services/Services';
 import { WindowsOptionsReportType } from '../common/InputHandler';
 import { AccessibilityManager } from './AccessibilityManager';
 import { Linkifier } from './Linkifier';
-import { Emitter, Event } from 'vs/base/common/event';
+import { Emitter, Event } from 'common/Event';
 import { addDisposableListener } from 'vs/base/browser/dom';
-import { MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';
+import { MutableDisposable, toDisposable } from 'common/Lifecycle';
 
 export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
   public textarea: HTMLTextAreaElement | undefined;

src/browser/Linkifier.ts

@@ -4,11 +4,11 @@
  */
 
 import { IBufferCellPosition, ILink, ILinkDecorations, ILinkWithState, ILinkifier2, ILinkifierEvent } from 'browser/Types';
-import { Disposable, dispose, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, dispose, toDisposable } from 'common/Lifecycle';
 import { IDisposable } from 'common/Types';
 import { IBufferService } from 'common/services/Services';
 import { ILinkProviderService, IMouseService, IRenderService } from './services/Services';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 import { addDisposableListener } from 'vs/base/browser/dom';
 
 export class Linkifier extends Disposable implements ILinkifier2 {

src/browser/TestUtils.test.ts

@@ -18,7 +18,7 @@ import { AttributeData } from 'common/buffer/AttributeData';
 import { ISelectionRedrawRequestEvent, ISelectionRequestScrollLinesEvent } from 'browser/selection/Types';
 import { css } from 'common/Color';
 import { createRenderDimensions } from 'browser/renderer/shared/RendererUtils';
-import { Emitter, type Event } from 'vs/base/common/event';
+import { Emitter, type Event } from 'common/Event';
 
 export class TestTerminal extends CoreBrowserTerminal {
   public get curAttrData(): IAttributeData { return (this as any)._inputHandler._curAttrData; }

src/browser/Types.ts

@@ -7,7 +7,7 @@ import { CharData, IColor, ICoreTerminal, ITerminalOptions } from 'common/Types'
 import { IBuffer } from 'common/buffer/Types';
 import { IDisposable, IRenderDimensions as IRenderDimensionsApi, Terminal as ITerminalApi } from '@xterm/xterm';
 import { channels, css } from 'common/Color';
-import type { Event } from 'vs/base/common/event';
+import type { Event } from 'common/Event';
 
 /**
  * A portion of the public API that are implemented identially internally and simply passed through.

src/browser/Viewport.ts

@@ -5,13 +5,13 @@
 
 import { ICoreBrowserService, IRenderService, IThemeService } from 'browser/services/Services';
 import { ViewportConstants } from 'browser/shared/Constants';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { IBufferService, ICoreMouseService, IOptionsService } from 'common/services/Services';
 import { CoreMouseEventType } from 'common/Types';
 import { addDisposableListener, scheduleAtNextAnimationFrame } from 'vs/base/browser/dom';
 import { SmoothScrollableElement } from 'vs/base/browser/ui/scrollbar/scrollableElement';
 import type { ScrollableElementChangeOptions } from 'vs/base/browser/ui/scrollbar/scrollableElementOptions';
-import { Emitter, Event } from 'vs/base/common/event';
+import { Emitter, Event } from 'common/Event';
 import { Scrollable, ScrollbarVisibility, type ScrollEvent } from 'vs/base/common/scrollable';
 import { Gesture, EventType as GestureEventType, type GestureEvent } from 'vs/base/browser/touch';
 

src/browser/decorations/BufferDecorationRenderer.ts

@@ -4,7 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import { ICoreBrowserService, IRenderService } from 'browser/services/Services';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { IBufferService, IDecorationService, IInternalDecoration } from 'common/services/Services';
 
 export class BufferDecorationRenderer extends Disposable {

src/browser/decorations/OverviewRulerRenderer.ts

@@ -5,7 +5,7 @@
 
 import { ColorZoneStore, IColorZone, IColorZoneStore } from 'browser/decorations/ColorZoneStore';
 import { ICoreBrowserService, IRenderService, IThemeService } from 'browser/services/Services';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { IBufferService, IDecorationService, IOptionsService } from 'common/services/Services';
 
 const enum Constants {

src/browser/public/Terminal.ts

@@ -6,14 +6,14 @@
 import * as Strings from 'browser/LocalizableStrings';
 import { CoreBrowserTerminal as TerminalCore } from 'browser/CoreBrowserTerminal';
 import { IBufferRange, ITerminal } from 'browser/Types';
-import { Disposable } from 'vs/base/common/lifecycle';
+import { Disposable } from 'common/Lifecycle';
 import { ITerminalOptions } from 'common/Types';
 import { AddonManager } from 'common/public/AddonManager';
 import { BufferNamespaceApi } from 'common/public/BufferNamespaceApi';
 import { ParserApi } from 'common/public/ParserApi';
 import { UnicodeApi } from 'common/public/UnicodeApi';
 import { IBufferNamespace as IBufferNamespaceApi, IDecoration, IDecorationOptions, IDisposable, ILinkProvider, ILocalizableStrings, IMarker, IModes, IParser, IRenderDimensions, ITerminalAddon, Terminal as ITerminalApi, ITerminalInitOnlyOptions, IUnicodeHandling } from '@xterm/xterm';
-import type { Event } from 'vs/base/common/event';
+import type { Event } from 'common/Event';
 
 /**
  * The set of options that only have an effect when set in the Terminal constructor.

src/browser/renderer/dom/DomRenderer.ts

@@ -12,9 +12,9 @@ import { IRenderDimensions, IRenderer, IRequestRedrawEvent, ISelectionRenderMode
 import { ICharSizeService, ICoreBrowserService, IThemeService } from 'browser/services/Services';
 import { ILinkifier2, ILinkifierEvent, ITerminal, ReadonlyColorSet } from 'browser/Types';
 import { color } from 'common/Color';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { IBufferService, ICoreService, IInstantiationService, IOptionsService } from 'common/services/Services';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 import { addDisposableListener } from 'vs/base/browser/dom';
 
 

src/browser/renderer/shared/Types.ts

@@ -6,7 +6,7 @@
 import { Terminal } from '@xterm/xterm';
 import { ITerminal } from 'browser/Types';
 import { IDisposable } from 'common/Types';
-import type { Event } from 'vs/base/common/event';
+import type { Event } from 'common/Event';
 
 export interface IDimensions {
   width: number;

src/browser/services/CharSizeService.ts

@@ -5,8 +5,8 @@
 
 import { IOptionsService } from 'common/services/Services';
 import { ICharSizeService } from 'browser/services/Services';
-import { Disposable } from 'vs/base/common/lifecycle';
-import { Emitter } from 'vs/base/common/event';
+import { Disposable } from 'common/Lifecycle';
+import { Emitter } from 'common/Event';
 
 export class CharSizeService extends Disposable implements ICharSizeService {
   public serviceBrand: undefined;

src/browser/services/CoreBrowserService.ts

@@ -4,9 +4,9 @@
  */
 
 import { ICoreBrowserService } from './Services';
-import { Emitter, Event } from 'vs/base/common/event';
+import { Emitter, Event } from 'common/Event';
 import { addDisposableListener } from 'vs/base/browser/dom';
-import { Disposable, MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, MutableDisposable, toDisposable } from 'common/Lifecycle';
 
 export class CoreBrowserService extends Disposable implements ICoreBrowserService {
   public serviceBrand: undefined;

src/browser/services/LinkProviderService.ts

@@ -1,5 +1,5 @@
 import { ILinkProvider, ILinkProviderService } from 'browser/services/Services';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { IDisposable } from 'common/Types';
 
 export class LinkProviderService extends Disposable implements ILinkProviderService {

src/browser/services/RenderService.ts

@@ -7,10 +7,10 @@ import { RenderDebouncer } from 'browser/RenderDebouncer';
 import { IRenderDebouncerWithCallback } from 'browser/Types';
 import { IRenderDimensions, IRenderer } from 'browser/renderer/shared/Types';
 import { ICharSizeService, ICoreBrowserService, IRenderService, IThemeService } from 'browser/services/Services';
-import { Disposable, MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, MutableDisposable, toDisposable } from 'common/Lifecycle';
 import { DebouncedIdleTask } from 'common/TaskQueue';
 import { IBufferService, ICoreService, IDecorationService, IOptionsService } from 'common/services/Services';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 
 interface ISelectionState {
   start: [number, number] | undefined;

src/browser/services/SelectionService.ts

@@ -9,14 +9,14 @@ import { moveToCellSequence } from 'browser/input/MoveToCell';
 import { SelectionModel } from 'browser/selection/SelectionModel';
 import { ISelectionRedrawRequestEvent, ISelectionRequestScrollLinesEvent } from 'browser/selection/Types';
 import { ICoreBrowserService, IMouseService, IRenderService, ISelectionService } from 'browser/services/Services';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import * as Browser from 'common/Platform';
 import { IBufferLine, IDisposable } from 'common/Types';
 import { getRangeLength } from 'common/buffer/BufferRange';
 import { CellData } from 'common/buffer/CellData';
 import { IBuffer } from 'common/buffer/Types';
 import { IBufferService, ICoreService, IOptionsService } from 'common/services/Services';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 
 /**
  * The number of pixels the mouse needs to be above or below the viewport in

src/browser/services/Services.ts

@@ -8,7 +8,7 @@ import { IColorSet, ILink, ReadonlyColorSet } from 'browser/Types';
 import { ISelectionRedrawRequestEvent as ISelectionRequestRedrawEvent, ISelectionRequestScrollLinesEvent } from 'browser/selection/Types';
 import { createDecorator } from 'common/services/ServiceRegistry';
 import { AllColorIndex, IDisposable, IKeyboardResult } from 'common/Types';
-import type { Event } from 'vs/base/common/event';
+import type { Event } from 'common/Event';
 
 export const ICharSizeService = createDecorator<ICharSizeService>('CharSizeService');
 export interface ICharSizeService {

src/browser/services/ThemeService.ts

@@ -7,10 +7,10 @@ import { ColorContrastCache } from 'browser/ColorContrastCache';
 import { IThemeService } from 'browser/services/Services';
 import { DEFAULT_ANSI_COLORS, IColorContrastCache, IColorSet, ReadonlyColorSet } from 'browser/Types';
 import { color, css, NULL_COLOR } from 'common/Color';
-import { Disposable } from 'vs/base/common/lifecycle';
+import { Disposable } from 'common/Lifecycle';
 import { IOptionsService, ITheme } from 'common/services/Services';
 import { AllColorIndex, IColor, SpecialColorIndex } from 'common/Types';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 
 interface IRestoreColorSet {
   foreground: IColor;

src/common/CircularList.ts

@@ -4,8 +4,8 @@
  */
 
 import { ICircularList } from 'common/Types';
-import { Disposable } from 'vs/base/common/lifecycle';
-import { Emitter } from 'vs/base/common/event';
+import { Disposable } from 'common/Lifecycle';
+import { Emitter } from 'common/Event';
 
 export interface IInsertEvent {
   index: number;

src/common/CoreTerminal.ts

@@ -37,8 +37,8 @@ import { IBufferSet } from 'common/buffer/Types';
 import { InputHandler } from 'common/InputHandler';
 import { WriteBuffer } from 'common/input/WriteBuffer';
 import { OscLinkService } from 'common/services/OscLinkService';
-import { Emitter, Event } from 'vs/base/common/event';
-import { Disposable, MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Emitter, Event } from 'common/Event';
+import { Disposable, MutableDisposable, toDisposable } from 'common/Lifecycle';
 
 // Only trigger this warning a single time per session
 let hasWriteSyncWarnHappened = false;

src/common/Event.ts

@@ -0,0 +1,105 @@
+/**
+ * Copyright (c) 2024-2026 The xterm.js authors. All rights reserved.
+ * @license MIT
+ *
+ * Minimal event utilities for xterm.js core.
+ * Simplified from VS Code's event.ts - no leak detection/profiling.
+ */
+
+import { IDisposable, DisposableStore, toDisposable } from 'common/Lifecycle';
+
+export interface Event<T> {
+  (listener: (e: T) => any, thisArgs?: any, disposables?: IDisposable[] | DisposableStore): IDisposable;
+}
+
+export class Emitter<T> {
+  private _listeners: Array<{ fn: (e: T) => any; thisArgs: any }> = [];
+  private _disposed = false;
+  private _event: Event<T> | undefined;
+
+  public get event(): Event<T> {
+    if (!this._event) {
+      this._event = (listener: (e: T) => any, thisArgs?: any, disposables?: IDisposable[] | DisposableStore) => {
+        if (this._disposed) {
+          return toDisposable(() => {});
+        }
+
+        const entry = { fn: listener, thisArgs };
+        this._listeners.push(entry);
+
+        const result = toDisposable(() => {
+          const idx = this._listeners.indexOf(entry);
+          if (idx !== -1) {
+            this._listeners.splice(idx, 1);
+          }
+        });
+
+        if (disposables) {
+          if (Array.isArray(disposables)) {
+            disposables.push(result);
+          } else {
+            disposables.add(result);
+          }
+        }
+
+        return result;
+      };
+    }
+    return this._event;
+  }
+
+  public fire(event: T): void {
+    if (this._disposed) {
+      return;
+    }
+    // Snapshot listeners to allow modifications during iteration
+    const listeners = this._listeners.slice();
+    for (const { fn, thisArgs } of listeners) {
+      fn.call(thisArgs, event);
+    }
+  }
+
+  public dispose(): void {
+    if (this._disposed) {
+      return;
+    }
+    this._disposed = true;
+    this._listeners.length = 0;
+  }
+}
+
+export namespace Event {
+  export function forward<T>(from: Event<T>, to: Emitter<T>): IDisposable {
+    return from(e => to.fire(e));
+  }
+
+  export function map<I, O>(event: Event<I>, map: (i: I) => O): Event<O> {
+    return (listener: (e: O) => any, thisArgs?: any, disposables?: IDisposable[] | DisposableStore) => {
+      return event(i => listener.call(thisArgs, map(i)), undefined, disposables);
+    };
+  }
+
+  export function any<T>(...events: Event<T>[]): Event<T>;
+  export function any(...events: Event<any>[]): Event<void>;
+  export function any<T>(...events: Event<T>[]): Event<T> {
+    return (listener: (e: T) => any, thisArgs?: any, disposables?: IDisposable[] | DisposableStore) => {
+      const store = new DisposableStore();
+      for (const event of events) {
+        store.add(event(e => listener.call(thisArgs, e)));
+      }
+      if (disposables) {
+        if (Array.isArray(disposables)) {
+          disposables.push(store);
+        } else {
+          disposables.add(store);
+        }
+      }
+      return store;
+    };
+  }
+
+  export function runAndSubscribe<T>(event: Event<T>, handler: (e: T | undefined) => void): IDisposable {
+    handler(undefined);
+    return event(e => handler(e));
+  }
+}

src/common/InputHandler.ts

@@ -8,7 +8,7 @@ import { IInputHandler, IAttributeData, IDisposable, IWindowOptions, IColorEvent
 import { C0, C1 } from 'common/data/EscapeSequences';
 import { CHARSETS, DEFAULT_CHARSET } from 'common/data/Charsets';
 import { EscapeSequenceParser } from 'common/parser/EscapeSequenceParser';
-import { Disposable } from 'vs/base/common/lifecycle';
+import { Disposable } from 'common/Lifecycle';
 import { StringToUtf32, stringFromCodePoint, Utf8ToUtf32 } from 'common/input/TextDecoder';
 import { BufferLine, DEFAULT_ATTR_DATA } from 'common/buffer/BufferLine';
 import { IParsingState, IEscapeSequenceParser, IParams, IFunctionIdentifier } from 'common/parser/Types';
@@ -21,7 +21,7 @@ import { OscHandler } from 'common/parser/OscParser';
 import { DcsHandler } from 'common/parser/DcsParser';
 import { IBuffer } from 'common/buffer/Types';
 import { parseColor } from 'common/input/XParseColor';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 import { XTERM_VERSION } from 'common/Version';
 
 /**

src/common/Lifecycle.ts

@@ -0,0 +1,100 @@
+/**
+ * Copyright (c) 2024-2026 The xterm.js authors. All rights reserved.
+ * @license MIT
+ *
+ * Minimal lifecycle utilities for xterm.js core.
+ * Simplified from VS Code's lifecycle.ts - no tracking/leak detection.
+ */
+
+export interface IDisposable {
+  dispose(): void;
+}
+
+export function toDisposable(fn: () => void): IDisposable {
+  return { dispose: fn };
+}
+
+export function dispose<T extends IDisposable>(disposables: T | T[] | undefined): void {
+  if (!disposables) {
+    return;
+  }
+  if (Array.isArray(disposables)) {
+    for (const d of disposables) {
+      d.dispose();
+    }
+  } else {
+    disposables.dispose();
+  }
+}
+
+export function combinedDisposable(...disposables: IDisposable[]): IDisposable {
+  return toDisposable(() => dispose(disposables));
+}
+
+export class DisposableStore implements IDisposable {
+  private readonly _disposables = new Set<IDisposable>();
+  private _isDisposed = false;
+
+  public get isDisposed(): boolean {
+    return this._isDisposed;
+  }
+
+  public add<T extends IDisposable>(o: T): T {
+    if (this._isDisposed) {
+      o.dispose();
+    } else {
+      this._disposables.add(o);
+    }
+    return o;
+  }
+
+  public dispose(): void {
+    if (this._isDisposed) {
+      return;
+    }
+    this._isDisposed = true;
+    for (const d of this._disposables) {
+      d.dispose();
+    }
+    this._disposables.clear();
+  }
+}
+
+export abstract class Disposable implements IDisposable {
+  protected readonly _store = new DisposableStore();
+
+  public dispose(): void {
+    this._store.dispose();
+  }
+
+  protected _register<T extends IDisposable>(o: T): T {
+    return this._store.add(o);
+  }
+}
+
+export class MutableDisposable<T extends IDisposable> implements IDisposable {
+  private _value: T | undefined;
+  private _isDisposed = false;
+
+  public get value(): T | undefined {
+    return this._isDisposed ? undefined : this._value;
+  }
+
+  public set value(value: T | undefined) {
+    if (this._isDisposed || value === this._value) {
+      return;
+    }
+    this._value?.dispose();
+    this._value = value;
+  }
+
+  public clear(): void {
+    this.value = undefined;
+  }
+
+  public dispose(): void {
+    this._isDisposed = true;
+    this._value?.dispose();
+    this._value = undefined;
+  }
+}

src/common/TestUtils.test.ts

@@ -12,7 +12,7 @@ import { BufferSet } from 'common/buffer/BufferSet';
 import { IDecPrivateModes, ICoreMouseEvent, CoreMouseEventType, ICharset, IModes, IAttributeData, IOscLinkData, IDisposable } from 'common/Types';
 import { UnicodeV6 } from 'common/input/UnicodeV6';
 import { IDecorationOptions, IDecoration } from '@xterm/xterm';
-import { Emitter, type Event } from 'vs/base/common/event';
+import { Emitter, type Event } from 'common/Event';
 
 export class MockBufferService implements IBufferService {
   public serviceBrand: any;

src/common/Types.ts

@@ -9,7 +9,7 @@ import { IBufferSet } from 'common/buffer/Types';
 import { IParams } from 'common/parser/Types';
 import { ICoreMouseService, ICoreService, IOptionsService, IUnicodeService } from 'common/services/Services';
 import { IFunctionIdentifier, ITerminalOptions as IPublicTerminalOptions } from '@xterm/xterm';
-import type { Emitter, Event } from 'vs/base/common/event';
+import type { Emitter, Event } from 'common/Event';
 
 export interface ICoreTerminal {
   coreMouseService: ICoreMouseService;

src/common/buffer/BufferSet.ts

@@ -3,12 +3,12 @@
  * @license MIT
  */
 
-import { Disposable } from 'vs/base/common/lifecycle';
+import { Disposable } from 'common/Lifecycle';
 import { IAttributeData } from 'common/Types';
 import { Buffer } from 'common/buffer/Buffer';
 import { IBuffer, IBufferSet } from 'common/buffer/Types';
 import { IBufferService, IOptionsService } from 'common/services/Services';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 
 /**
  * The BufferSet represents the set of two buffers used by xterm terminals (normal and alt) and

src/common/buffer/Marker.ts

@@ -4,8 +4,8 @@
  */
 
 import { IDisposable, IMarker } from 'common/Types';
-import { Emitter } from 'vs/base/common/event';
-import { dispose } from 'vs/base/common/lifecycle';
+import { Emitter } from 'common/Event';
+import { dispose } from 'common/Lifecycle';
 
 export class Marker implements IMarker {
   private static _nextId = 1;

src/common/buffer/Types.ts

@@ -4,7 +4,7 @@
  */
 
 import { IAttributeData, ICircularList, IBufferLine, ICellData, IMarker, ICharset, IDisposable } from 'common/Types';
-import type { Event } from 'vs/base/common/event';
+import type { Event } from 'common/Event';
 
 // BufferIndex denotes a position in the buffer: [rowIndex, colIndex]
 export type BufferIndex = [number, number];

src/common/input/WriteBuffer.ts

@@ -4,8 +4,8 @@
  * @license MIT
  */
 
-import { Disposable } from 'vs/base/common/lifecycle';
-import { Emitter } from 'vs/base/common/event';
+import { Disposable } from 'common/Lifecycle';
+import { Emitter } from 'common/Event';
 
 declare const setTimeout: (handler: () => void, timeout?: number) => void;
 

src/common/parser/EscapeSequenceParser.ts

@@ -5,7 +5,7 @@
 
 import { IParsingState, IDcsHandler, IEscapeSequenceParser, IParams, IOscHandler, IHandlerCollection, CsiHandlerType, OscFallbackHandlerType, IOscParser, EscHandlerType, IDcsParser, DcsFallbackHandlerType, IFunctionIdentifier, ExecuteFallbackHandlerType, CsiFallbackHandlerType, EscFallbackHandlerType, PrintHandlerType, PrintFallbackHandlerType, ExecuteHandlerType, IParserStackState, ParserStackType, ResumableHandlersType } from 'common/parser/Types';
 import { ParserState, ParserAction } from 'common/parser/Constants';
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { IDisposable } from 'common/Types';
 import { Params } from 'common/parser/Params';
 import { OscParser } from 'common/parser/OscParser';

src/common/public/BufferNamespaceApi.ts

@@ -6,8 +6,8 @@
 import { IBuffer as IBufferApi, IBufferNamespace as IBufferNamespaceApi } from '@xterm/xterm';
 import { BufferApiView } from 'common/public/BufferApiView';
 import { ICoreTerminal } from 'common/Types';
-import { Disposable } from 'vs/base/common/lifecycle';
-import { Emitter } from 'vs/base/common/event';
+import { Disposable } from 'common/Lifecycle';
+import { Emitter } from 'common/Event';
 
 export class BufferNamespaceApi extends Disposable implements IBufferNamespaceApi {
   private _normal: BufferApiView;

src/common/services/BufferService.ts

@@ -3,12 +3,12 @@
  * @license MIT
  */
 
-import { Disposable } from 'vs/base/common/lifecycle';
+import { Disposable } from 'common/Lifecycle';
 import { IAttributeData, IBufferLine } from 'common/Types';
 import { BufferSet } from 'common/buffer/BufferSet';
 import { IBuffer, IBufferSet } from 'common/buffer/Types';
 import { IBufferService, IOptionsService, type IBufferResizeEvent } from 'common/services/Services';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 
 export const MINIMUM_COLS = 2; // Less than 2 can mess with wide chars
 export const MINIMUM_ROWS = 1;

src/common/services/CoreMouseService.ts

@@ -4,8 +4,8 @@
  */
 import { IBufferService, ICoreService, ICoreMouseService, IOptionsService } from 'common/services/Services';
 import { ICoreMouseProtocol, ICoreMouseEvent, CoreMouseEncoding, CoreMouseEventType, CoreMouseButton, CoreMouseAction } from 'common/Types';
-import { Disposable } from 'vs/base/common/lifecycle';
-import { Emitter } from 'vs/base/common/event';
+import { Disposable } from 'common/Lifecycle';
+import { Emitter } from 'common/Event';
 
 /**
  * Supported default protocols.

src/common/services/CoreService.ts

@@ -4,10 +4,10 @@
  */
 
 import { clone } from 'common/Clone';
-import { Disposable } from 'vs/base/common/lifecycle';
+import { Disposable } from 'common/Lifecycle';
 import { IDecPrivateModes, IKittyKeyboardState, IModes } from 'common/Types';
 import { IBufferService, ICoreService, ILogService, IOptionsService } from 'common/services/Services';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 
 const DEFAULT_MODES: IModes = Object.freeze({
   insertMode: false

src/common/services/DecorationService.test.ts

@@ -6,8 +6,8 @@
 import { assert } from 'chai';
 import { DecorationService } from './DecorationService';
 import { IMarker } from 'common/Types';
-import { Disposable } from 'vs/base/common/lifecycle';
-import { Emitter } from 'vs/base/common/event';
+import { Disposable } from 'common/Lifecycle';
+import { Emitter } from 'common/Event';
 
 function createFakeMarker(line: number): IMarker {
   return Object.freeze(new class extends Disposable {

src/common/services/DecorationService.ts

@@ -4,12 +4,12 @@
  */
 
 import { css } from 'common/Color';
-import { Disposable, DisposableStore, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, DisposableStore, toDisposable } from 'common/Lifecycle';
 import { IDecorationService, IInternalDecoration } from 'common/services/Services';
 import { SortedList } from 'common/SortedList';
 import { IColor } from 'common/Types';
 import { IDecoration, IDecorationOptions, IMarker } from '@xterm/xterm';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 
 // Work variables to avoid garbage collection
 let $xmin = 0;

src/common/services/LogService.ts

@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { Disposable } from 'vs/base/common/lifecycle';
+import { Disposable } from 'common/Lifecycle';
 import { ILogService, IOptionsService, LogLevelEnum } from 'common/services/Services';
 
 type LogType = (message?: any, ...optionalParams: any[]) => void;

src/common/services/OptionsService.ts

@@ -3,11 +3,11 @@
  * @license MIT
  */
 
-import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { Disposable, toDisposable } from 'common/Lifecycle';
 import { isMac } from 'common/Platform';
 import { CursorStyle, IDisposable } from 'common/Types';
 import { FontWeight, IOptionsService, ITerminalOptions } from 'common/services/Services';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 
 export const DEFAULT_OPTIONS: Readonly<Required<ITerminalOptions>> = {
   cols: 80,

src/common/services/Services.ts

@@ -7,7 +7,7 @@ import { IDecoration, IDecorationOptions, ILinkHandler, ILogger, IWindowsPty, ty
 import { CoreMouseEncoding, CoreMouseEventType, CursorInactiveStyle, CursorStyle, IAttributeData, ICharset, IColor, ICoreMouseEvent, ICoreMouseProtocol, IDecPrivateModes, IDisposable, IKittyKeyboardState, IModes, IOscLinkData, IWindowOptions } from 'common/Types';
 import { IBuffer, IBufferSet } from 'common/buffer/Types';
 import { createDecorator } from 'common/services/ServiceRegistry';
-import type { Emitter, Event } from 'vs/base/common/event';
+import type { Emitter, Event } from 'common/Event';
 
 export const IBufferService = createDecorator<IBufferService>('BufferService');
 export interface IBufferService {

src/common/services/UnicodeService.ts

@@ -5,7 +5,7 @@
 
 import { UnicodeV6 } from 'common/input/UnicodeV6';
 import { IUnicodeService, IUnicodeVersionProvider, UnicodeCharProperties, UnicodeCharWidth } from 'common/services/Services';
-import { Emitter } from 'vs/base/common/event';
+import { Emitter } from 'common/Event';
 
 export class UnicodeService implements IUnicodeService {
   public serviceBrand: any;

src/common/tsconfig.json

@@ -11,14 +11,11 @@
     ],
     "baseUrl": "..",
     "paths": {
-      "vs/*": [ "./vs/*" ]
+      "common/*": [ "./common/*" ]
     }
   },
   "include": [
     "./**/*",
     "../../typings/xterm.d.ts"
-  ],
-  "references": [
-    { "path": "../vs" }
   ]
 }

src/headless/Terminal.ts

@@ -25,7 +25,7 @@ import { DEFAULT_ATTR_DATA } from 'common/buffer/BufferLine';
 import { IBuffer } from 'common/buffer/Types';
 import { CoreTerminal } from 'common/CoreTerminal';
 import { IMarker, ITerminalOptions } from 'common/Types';
-import { Emitter, Event } from 'vs/base/common/event';
+import { Emitter, Event } from 'common/Event';
 
 export class Terminal extends CoreTerminal {
   private readonly _onBell = this._register(new Emitter<void>());

src/headless/public/Terminal.ts

@@ -10,8 +10,8 @@ import { IBufferNamespace as IBufferNamespaceApi, IMarker, IModes, IParser, ITer
 import { Terminal as TerminalCore } from 'headless/Terminal';
 import { AddonManager } from 'common/public/AddonManager';
 import { ITerminalOptions } from 'common/Types';
-import { Disposable } from 'vs/base/common/lifecycle';
-import type { Event } from 'vs/base/common/event';
+import { Disposable } from 'common/Lifecycle';
+import type { Event } from 'common/Event';
 /**
  * The set of options that only have an effect when set in the Terminal constructor.
  */