fix(browser): place imports before module const in TimeBasedDebouncer

RENDER_DEBOUNCE_THRESHOLD_MS was declared above the import, which
breaks ES module conventions and can confuse tooling. Move the import
to the top of the module after the license header.

Co-authored-by: Cursor <cursoragent@cursor.com>

.oxlintrc.json

@@ -1,6 +1,7 @@
 {
   "$schema": "./node_modules/oxlint/configuration_schema.json",
   "plugins": [
+    "import",
     "typescript"
   ],
   "categories": {
@@ -104,7 +105,8 @@
     "typescript/no-wrapper-object-types": "error",
     "typescript/prefer-as-const": "error",
     "typescript/prefer-namespace-keyword": "error",
-    "typescript/triple-slash-reference": "error"
+    "typescript/triple-slash-reference": "error",
+    "import/no-cycle": "error"
   },
   "overrides": [
     {

addons/addon-fit/src/FitAddon.ts

@@ -74,14 +74,14 @@ export class FitAddon implements ITerminalAddon, IFitApi {
       : (this._terminal.options.scrollbar?.width ?? ViewportConstants.DEFAULT_SCROLL_BAR_WIDTH));
 
     const parentElementStyle = _getComputedStyle(this._terminal.element.parentElement);
-    const parentElementHeight = parseInt(parentElementStyle.getPropertyValue('height'));
+    const parentElementHeight = Math.max(0, parseInt(parentElementStyle.getPropertyValue('height'), 10) || 0);
-    const parentElementWidth = Math.max(0, parseInt(parentElementStyle.getPropertyValue('width')));
+    const parentElementWidth = Math.max(0, parseInt(parentElementStyle.getPropertyValue('width'), 10) || 0);
     const elementStyle = _getComputedStyle(this._terminal.element);
     const elementPadding = {
-      top: parseInt(elementStyle.getPropertyValue('padding-top')),
+      top: parseInt(elementStyle.getPropertyValue('padding-top'), 10) || 0,
-      bottom: parseInt(elementStyle.getPropertyValue('padding-bottom')),
+      bottom: parseInt(elementStyle.getPropertyValue('padding-bottom'), 10) || 0,
-      right: parseInt(elementStyle.getPropertyValue('padding-right')),
+      right: parseInt(elementStyle.getPropertyValue('padding-right'), 10) || 0,
-      left: parseInt(elementStyle.getPropertyValue('padding-left'))
+      left: parseInt(elementStyle.getPropertyValue('padding-left'), 10) || 0
     };
     const elementPaddingVer = elementPadding.top + elementPadding.bottom;
     const elementPaddingHor = elementPadding.right + elementPadding.left;

addons/addon-image/src/IIPHandler.ts

@@ -222,8 +222,8 @@ export class IIPHandler implements IOscHandler, IResetHandler {
 
   private _dim(s: string, total: number, cdim: number): number {
     if (s === 'auto') return 0;
-    if (s.endsWith('%')) return parseInt(s.slice(0, -1)) * total / 100;
+    if (s.endsWith('%')) return parseInt(s.slice(0, -1), 10) * total / 100;
-    if (s.endsWith('px')) return parseInt(s.slice(0, -2));
+    if (s.endsWith('px')) return parseInt(s.slice(0, -2), 10);
-    return parseInt(s) * cdim;
+    return parseInt(s, 10) * cdim;
   }
 }

addons/addon-image/src/Types.ts

@@ -9,7 +9,8 @@ import { IDisposable, IMarker, Terminal } from '@xterm/xterm';
 import { Attributes, BgFlags, Content, ExtFlags, UnderlineStyle } from 'common/buffer/Constants';
 import type { AttributeData } from 'common/buffer/AttributeData';
 import type { IParams, IDcsHandler, IOscHandler, IApcHandler, IEscapeSequenceParser } from 'common/parser/Types';
-import type { IBufferLine, IExtendedAttrs, IInputHandler } from 'common/Types';
+import type { IInputHandler } from 'common/Types';
+import type { IBufferLine, IExtendedAttrs } from 'common/buffer/Types';
 import type { ITerminal, ReadonlyColorSet } from 'browser/Types';
 import type { IRenderDimensions } from 'browser/renderer/shared/Types';
 import type { ICoreBrowserService, IRenderService, IThemeService } from 'browser/services/Services';

addons/addon-image/src/kitty/KittyGraphicsTypes.ts

@@ -168,7 +168,7 @@ export function parseKittyCommand(data: string): IKittyCommand {
       cmd.deleteSelector = value;
       continue;
     }
-    const numValue = parseInt(value);
+    const numValue = parseInt(value, 10);
     switch (key) {
       case KittyKey.FORMAT: cmd.format = numValue; break;
       case KittyKey.ID: cmd.id = numValue; break;

addons/addon-serialize/src/SerializeAddon.ts

@@ -7,7 +7,8 @@
 
 import type { IBuffer, IBufferCell, IBufferRange, ITerminalAddon, Terminal } from '@xterm/xterm';
 import type { IHTMLSerializeOptions, SerializeAddon as ISerializeApi, ISerializeOptions, ISerializeRange } from '@xterm/addon-serialize';
-import { IAttributeData, IColor } from 'common/Types';
+import { IColor } from 'common/Types';
+import { IAttributeData } from 'common/buffer/Types';
 import { DEFAULT_ANSI_COLORS } from 'browser/Types';
 import { UnderlineStyle } from 'common/buffer/Constants';
 

addons/addon-webgl/src/CellColorResolver.ts

@@ -3,7 +3,7 @@ import { ICoreBrowserService, IThemeService } from 'browser/services/Services';
 import { ReadonlyColorSet } from 'browser/Types';
 import { Attributes, BgFlags, ExtFlags, FgFlags, NULL_CELL_CODE, UnderlineStyle } from 'common/buffer/Constants';
 import { IDecorationService, IOptionsService } from 'common/services/Services';
-import { ICellData } from 'common/Types';
+import { ICellData } from 'common/buffer/Types';
 import { Terminal } from '@xterm/xterm';
 import { rgba } from 'common/Color';
 import { treatGlyphAsBackgroundColor } from 'browser/renderer/shared/RendererUtils';

addons/addon-webgl/src/WebglRenderer.ts

@@ -10,7 +10,7 @@ import { CursorBlinkStateManager } from './CursorBlinkStateManager';
 import { observeDevicePixelDimensions } from './DevicePixelObserver';
 import { IRenderDimensions, IRenderer, IRequestRedrawEvent } from 'browser/renderer/shared/Types';
 import { ICharSizeService, ICharacterJoinerService, ICoreBrowserService, IThemeService } from 'browser/services/Services';
-import { CharData, IBufferLine, ICellData } from 'common/Types';
+import { CharData, IBufferLine, ICellData } from 'common/buffer/Types';
 import { AttributeData } from 'common/buffer/AttributeData';
 import { CellData } from 'common/buffer/CellData';
 import { Attributes, Content, FgFlags, NULL_CELL_CHAR, NULL_CELL_CODE } from 'common/buffer/Constants';

addons/addon-webgl/src/customGlyphs/CustomGlyphRasterizer.ts

@@ -221,8 +221,8 @@ function drawPathDefinitionCharacter(
       const rx = parseFloat(args[0]) * deviceCellWidth;
       const ry = parseFloat(args[1]) * deviceCellHeight;
       const xAxisRotation = parseFloat(args[2]) * Math.PI / 180;
-      const largeArcFlag = parseInt(args[3]);
+      const largeArcFlag = parseInt(args[3], 10);
-      const sweepFlag = parseInt(args[4]);
+      const sweepFlag = parseInt(args[4], 10);
       const x = xOffset + parseFloat(args[5]) * deviceCellWidth;
       const y = yOffset + parseFloat(args[6]) * deviceCellHeight;
       drawSvgArc(ctx, currentX, currentY, rx, ry, xAxisRotation, largeArcFlag, sweepFlag, x, y);

src/browser/CoreBrowserTerminal.ts

@@ -505,7 +505,7 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
       this.textarea,
       parent.ownerDocument.defaultView ?? window,
       // Force unsafe null in node.js environment for tests
-      this._document ?? (typeof window !== 'undefined') ? window.document : null as any
+      this._document ?? ((typeof window !== 'undefined') ? window.document : null as any)
     ));
     this._instantiationService.setService(ICoreBrowserService, this._coreBrowserService);
 

src/browser/OscLinkProvider.test.ts

@@ -8,7 +8,8 @@ import { OscLinkProvider } from './OscLinkProvider';
 import { ILink } from './Types';
 import { createCellData, MockBufferService, MockOptionsService } from '../common/TestUtils.test';
 import { IBufferService, IOscLinkService } from '../common/services/Services';
-import { IBufferLine, IOscLinkData } from '../common/Types';
+import { IOscLinkData } from '../common/Types';
+import { IBufferLine } from '../common/buffer/Types';
 
 class TestOscLinkService implements IOscLinkService {
   public serviceBrand: any;

src/browser/OscLinkProvider.ts

@@ -6,7 +6,7 @@
 import { IBufferRange, ILink } from './Types';
 import { ILinkProvider } from './services/Services';
 import { CellData } from '../common/buffer/CellData';
-import { IBufferLine } from '../common/Types';
+import { IBufferLine } from '../common/buffer/Types';
 import { IBufferService, IOptionsService, IOscLinkService } from '../common/services/Services';
 
 export class OscLinkProvider implements ILinkProvider {

src/browser/RenderDebouncer.ts

@@ -23,7 +23,7 @@ export class RenderDebouncer implements IRenderDebouncerWithCallback {
   }
 
   public dispose(): void {
-    if (this._animationFrame) {
+    if (this._animationFrame !== undefined) {
       this._coreBrowserService.window.cancelAnimationFrame(this._animationFrame);
       this._animationFrame = undefined;
     }
@@ -31,7 +31,7 @@ export class RenderDebouncer implements IRenderDebouncerWithCallback {
 
   public addRefreshCallback(callback: FrameRequestCallback): number {
     this._refreshCallbacks.push(callback);
-    if (!this._animationFrame) {
+    if (this._animationFrame === undefined) {
       this._animationFrame = this._coreBrowserService.window.requestAnimationFrame(() => this._innerRefresh());
     }
     return this._animationFrame;
@@ -46,7 +46,7 @@ export class RenderDebouncer implements IRenderDebouncerWithCallback {
     this._rowStart = this._rowStart !== undefined ? Math.min(this._rowStart, rowStart) : rowStart;
     this._rowEnd = this._rowEnd !== undefined ? Math.max(this._rowEnd, rowEnd) : rowEnd;
 
-    if (this._animationFrame) {
+    if (this._animationFrame !== undefined) {
       return;
     }
 

src/browser/Terminal.test.ts

@@ -9,7 +9,7 @@ import { assert } from 'chai';
 import { DEFAULT_ATTR_DATA } from '../common/buffer/BufferLine';
 import { CellData } from '../common/buffer/CellData';
 import { MockUnicodeService, createCellData } from '../common/TestUtils.test';
-import { IMarker } from '../common/Types';
+import { IMarker } from '../common/buffer/Types';
 
 const INIT_COLS = 80;
 const INIT_ROWS = 24;

src/browser/TestUtils.test.ts

@@ -7,8 +7,9 @@ import { IDisposable, IMarker, ILinkProvider, IDecorationOptions, IDecoration, I
 import { ICharacterJoinerService, ICharSizeService, ICoreBrowserService, IMouseService, IRenderService, ISelectionService, IThemeService } from './services/Services';
 import { IRenderDimensions, IRenderer, IRequestRedrawEvent } from './renderer/shared/Types';
 import { IColorSet, ITerminal, ILinkifier2, IBrowser, IViewport, ICompositionHelper, CharacterJoinerHandler, IBufferRange, ReadonlyColorSet, IBufferElementProvider } from './Types';
-import { IBuffer, IBufferSet } from '../common/buffer/Types';
+import { IAttributeData, IBuffer, IBufferLine, IBufferSet, ICellData } from '../common/buffer/Types';
-import { IBufferLine, ICellData, IAttributeData, ICircularList, XtermListener, ICharset, ITerminalOptions, ColorIndex } from '../common/Types';
+import { ICircularList } from '../common/CircularList';
+import { XtermListener, ICharset, ITerminalOptions, ColorIndex } from '../common/Types';
 import { Buffer } from '../common/buffer/Buffer';
 import * as Browser from '../common/Platform';
 import { CoreBrowserTerminal } from './CoreBrowserTerminal';

src/browser/TimeBasedDebouncer.ts

@@ -3,10 +3,10 @@
  * @license MIT
  */
 
-const RENDER_DEBOUNCE_THRESHOLD_MS = 1000; // 1 Second
-
 import { IRenderDebouncer } from './Types';
 
+const RENDER_DEBOUNCE_THRESHOLD_MS = 1000; // 1 Second
+
 /**
  * Debounces calls to update screen readers to update at most once configurable interval of time.
  */
@@ -31,7 +31,9 @@ export class TimeBasedDebouncer implements IRenderDebouncer {
   public dispose(): void {
     if (this._refreshTimeoutID) {
       clearTimeout(this._refreshTimeoutID);
+      this._refreshTimeoutID = undefined;
     }
+    this._additionalRefreshRequested = false;
   }
 
   public refresh(rowStart: number | undefined, rowEnd: number | undefined, rowCount: number): void {
@@ -47,7 +49,12 @@ export class TimeBasedDebouncer implements IRenderDebouncer {
     // enough time to pass before refreshing again.
     const refreshRequestTime: number = performance.now();
     if (refreshRequestTime - this._lastRefreshMs >= this._debounceThresholdMS) {
-      // Enough time has lapsed since the last refresh; refresh immediately
+      // Enough time has elapsed since the last refresh; refresh immediately
+      if (this._refreshTimeoutID !== undefined) {
+        clearTimeout(this._refreshTimeoutID);
+        this._refreshTimeoutID = undefined;
+        this._additionalRefreshRequested = false;
+      }
       this._lastRefreshMs = refreshRequestTime;
       this._innerRefresh();
     } else if (!this._additionalRefreshRequested) {

src/browser/Types.ts

@@ -3,8 +3,9 @@
  * @license MIT
  */
 
-import { CharData, IColor, ICoreTerminal, ITerminalOptions } from '../common/Types';
+import { IColor, ITerminalOptions } from '../common/Types';
-import { IBuffer } from '../common/buffer/Types';
+import { CharData, IBuffer } from '../common/buffer/Types';
+import { ICoreTerminal } from '../common/CoreTerminal';
 import { IDisposable, IRenderDimensions as IRenderDimensionsApi, Terminal as ITerminalApi } from '@xterm/xterm';
 import { channels, css } from '../common/Color';
 import type { IEvent } from '../common/Event';

src/browser/input/Mouse.ts

@@ -6,8 +6,8 @@
 export function getCoordsRelativeToElement(window: Pick<Window, 'getComputedStyle'>, event: {clientX: number, clientY: number}, element: HTMLElement): [number, number] {
   const rect = element.getBoundingClientRect();
   const elementStyle = window.getComputedStyle(element);
-  const leftPadding = parseInt(elementStyle.getPropertyValue('padding-left'));
+  const leftPadding = parseInt(elementStyle.getPropertyValue('padding-left'), 10);
-  const topPadding = parseInt(elementStyle.getPropertyValue('padding-top'));
+  const topPadding = parseInt(elementStyle.getPropertyValue('padding-top'), 10);
   return [
     event.clientX - rect.left - leftPadding,
     event.clientY - rect.top - topPadding
@@ -22,7 +22,7 @@ export function getCoordsRelativeToElement(window: Pick<Window, 'getComputedStyl
  * @param event The mouse event.
  * @param element The terminal's container element.
  * @param colCount The number of columns in the terminal.
- * @param rowCount The number of rows n the terminal.
+ * @param rowCount The number of rows in the terminal.
  * @param hasValidCharSize Whether there is a valid character size available.
  * @param cssCellWidth The cell width device pixel render dimensions.
  * @param cssCellHeight The cell height device pixel render dimensions.
@@ -37,10 +37,6 @@ export function getCoords(window: Pick<Window, 'getComputedStyle'>, event: Pick<
   }
 
   const coords = getCoordsRelativeToElement(window, event, element);
-  if (!coords) {
-    return undefined;
-  }
-
   coords[0] = Math.ceil((coords[0] + (isSelection ? cssCellWidth / 2 : 0)) / cssCellWidth);
   coords[1] = Math.ceil(coords[1] / cssCellHeight);
 

src/browser/input/MoveToCell.ts

@@ -156,7 +156,7 @@ function wrappedRowsForRow(currentRow: number, bufferService: IBufferService): n
  */
 function horizontalDirection(startX: number, startY: number, targetX: number, targetY: number, bufferService: IBufferService, applicationCursor: boolean): Direction {
   let startRow;
-  if (moveToRequestedRow(targetX, targetY, bufferService, applicationCursor).length > 0) {
+  if (moveToRequestedRow(startY, targetY, bufferService, applicationCursor).length > 0) {
     startRow = targetY - wrappedRowsForRow(targetY, bufferService);
   } else {
     startRow = startY;

src/browser/renderer/dom/DomRenderer.ts

@@ -694,7 +694,7 @@ class CursorBlinkStateManager {
   }
 
   private _clearIdleTimer(): void {
-    if (this._idleTimeout) {
+    if (this._idleTimeout !== undefined) {
       this._coreBrowserService.window.clearTimeout(this._idleTimeout);
       this._idleTimeout = undefined;
     }

src/browser/renderer/dom/DomRendererRowFactory.test.ts

@@ -9,7 +9,7 @@ import { DomRendererRowFactory } from './DomRendererRowFactory';
 import { NULL_CELL_CODE, NULL_CELL_WIDTH, NULL_CELL_CHAR, DEFAULT_ATTR, FgFlags, BgFlags, Attributes, UnderlineStyle } from '../../../common/buffer/Constants';
 import { BufferLine, DEFAULT_ATTR_DATA } from '../../../common/buffer/BufferLine';
 import { BufferLineStringCache } from '../../../common/buffer/BufferLineStringCache';
-import { IBufferLine } from '../../../common/Types';
+import { IBufferLine } from '../../../common/buffer/Types';
 import { CellData } from '../../../common/buffer/CellData';
 import { MockCoreService, MockDecorationService, MockOptionsService, createCellData, NULL_CELL_DATA } from '../../../common/TestUtils.test';
 import { MockCharacterJoinerService, MockCoreBrowserService, MockThemeService } from '../../TestUtils.test';

src/browser/renderer/dom/DomRendererRowFactory.ts

@@ -3,7 +3,8 @@
  * @license MIT
  */
 
-import { IBufferLine, ICellData, IColor } from '../../../common/Types';
+import { IColor } from '../../../common/Types';
+import { IBufferLine, ICellData } from '../../../common/buffer/Types';
 import { INVERTED_DEFAULT_COLOR } from '../shared/Constants';
 import { WHITESPACE_CELL_CHAR, Attributes } from '../../../common/buffer/Constants';
 import { CellData } from '../../../common/buffer/CellData';

src/browser/scrollable/mouseEvent.ts

@@ -217,7 +217,7 @@ export class StandardWheelEvent {
     let shouldFactorDPR: boolean = false;
     if (platform.isChrome) {
       const chromeVersionMatch = navigator.userAgent.match(/Chrome\/(\d+)/);
-      const chromeMajorVersion = chromeVersionMatch ? parseInt(chromeVersionMatch[1]) : 123;
+      const chromeMajorVersion = chromeVersionMatch ? parseInt(chromeVersionMatch[1], 10) : 123;
       shouldFactorDPR = chromeMajorVersion <= 122;
     }
 

src/browser/services/CharacterJoinerService.test.ts

@@ -8,7 +8,7 @@ import { ICharacterJoinerService } from './Services';
 import { CharacterJoinerService } from './CharacterJoinerService';
 import { BufferLine } from '../../common/buffer/BufferLine';
 import { BufferLineStringCache } from '../../common/buffer/BufferLineStringCache';
-import { IBufferLine } from '../../common/Types';
+import { IBufferLine } from '../../common/buffer/Types';
 import { CellData } from '../../common/buffer/CellData';
 import { MockBufferService, createCellData } from '../../common/TestUtils.test';
 

src/browser/services/CharacterJoinerService.ts

@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { IBufferLine, ICellData, CharData } from '../../common/Types';
+import { CharData, IBufferLine, ICellData } from '../../common/buffer/Types';
 import { ICharacterJoiner } from '../Types';
 import { AttributeData } from '../../common/buffer/AttributeData';
 import { WHITESPACE_CELL_CHAR, Content } from '../../common/buffer/Constants';

src/browser/services/SelectionService.test.ts

@@ -6,14 +6,13 @@
 import { assert } from 'chai';
 import { SelectionService, SelectionMode } from './SelectionService';
 import { SelectionModel } from '../selection/SelectionModel';
-import { IBufferLine } from '../../common/Types';
+import { IBuffer, IBufferLine } from '../../common/buffer/Types';
 import { MockBufferService, MockOptionsService, MockCoreService, MockMouseStateService, createCellData } from '../../common/TestUtils.test';
 import { BufferLine } from '../../common/buffer/BufferLine';
 import { BufferLineStringCache } from '../../common/buffer/BufferLineStringCache';
 import { IBufferService, IOptionsService } from '../../common/services/Services';
 import { MockCoreBrowserService, MockMouseService, MockRenderService } from '../TestUtils.test';
 import { CellData } from '../../common/buffer/CellData';
-import { IBuffer } from '../../common/buffer/Types';
 import { IRenderService } from './Services';
 
 const TEST_STRING_CACHE = new BufferLineStringCache();

src/browser/services/SelectionService.ts

@@ -11,10 +11,10 @@ import { ISelectionRedrawRequestEvent, ISelectionRequestScrollLinesEvent } from
 import { ICoreBrowserService, IMouseCoordsService, IRenderService, ISelectionService } from './Services';
 import { Disposable, MutableDisposable, toDisposable } from '../../common/Lifecycle';
 import * as Browser from '../../common/Platform';
-import { IBufferLine, ICellData, IDisposable } from '../../common/Types';
+import { IDisposable } from '../../common/Types';
+import { IBuffer, IBufferLine, ICellData } from '../../common/buffer/Types';
 import { getRangeLength } from '../../common/buffer/BufferRange';
 import { CellData } from '../../common/buffer/CellData';
-import { IBuffer } from '../../common/buffer/Types';
 import { IBufferService, ICoreService, IMouseStateService, IOptionsService } from '../../common/services/Services';
 import { Emitter } from '../../common/Event';
 

src/common/CircularList.ts

@@ -3,9 +3,8 @@
  * @license MIT
  */
 
-import { ICircularList } from './Types';
 import { Disposable } from './Lifecycle';
-import { Emitter } from './Event';
+import { Emitter, type IEvent } from './Event';
 
 export interface IInsertEvent {
   index: number;
@@ -17,6 +16,28 @@ export interface IDeleteEvent {
   amount: number;
 }
 
+export interface ICircularList<T> {
+  length: number;
+  maxLength: number;
+  isFull: boolean;
+
+  onDeleteEmitter: Emitter<IDeleteEvent>;
+  onDelete: IEvent<IDeleteEvent>;
+  onInsertEmitter: Emitter<IInsertEvent>;
+  onInsert: IEvent<IInsertEvent>;
+  onTrimEmitter: Emitter<number>;
+  onTrim: IEvent<number>;
+
+  get(index: number): T | undefined;
+  set(index: number, value: T): void;
+  push(value: T): void;
+  recycle(): T;
+  pop(): T | undefined;
+  splice(start: number, deleteCount: number, ...items: T[]): void;
+  trimStart(count: number): void;
+  shiftElements(start: number, count: number, offset: number): void;
+}
+
 /**
  * Represents a circular list; a list with a maximum size that wraps around when push is called,
  * overriding values at the start of the list.

src/common/Color.ts

@@ -177,9 +177,9 @@ export namespace css {
     // Formats: rgb() or rgba()
     const rgbaMatch = css.match(/rgba?\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*(,\s*(0|1|\d?\.(\d+))\s*)?\)/);
     if (rgbaMatch) {
-      $r = parseInt(rgbaMatch[1]);
+      $r = parseInt(rgbaMatch[1], 10);
-      $g = parseInt(rgbaMatch[2]);
+      $g = parseInt(rgbaMatch[2], 10);
-      $b = parseInt(rgbaMatch[3]);
+      $b = parseInt(rgbaMatch[3], 10);
       $a = Math.round((rgbaMatch[5] === undefined ? 1 : parseFloat(rgbaMatch[5])) * 0xFF);
       return channels.toColor($r, $g, $b, $a);
     }

src/common/CoreTerminal.ts

@@ -21,19 +21,20 @@
  *   http://linux.die.net/man/7/urxvt
  */
 
-import { IInstantiationService, IOptionsService, IBufferService, ILogService, ICharsetService, ICoreService, IMouseStateService, IUnicodeService, LogLevelEnum, ITerminalOptions, IOscLinkService } from './services/Services';
+import { IInstantiationService, IOptionsService, IBufferService, ILogService, ICharsetService, ICoreService, IMouseStateService, IUnicodeService, LogLevelEnum, IOscLinkService } from './services/Services';
 import { InstantiationService } from './services/InstantiationService';
 import { LogService } from './services/LogService';
 import { BufferService, BufferServiceConstants } from './services/BufferService';
 import { OptionsService } from './services/OptionsService';
-import { IDisposable, IAttributeData, ICoreTerminal, IScrollEvent } from './Types';
+import { IDisposable, IScrollEvent, ITerminalOptions, IParams } from './Types';
+import { IAttributeData, IBufferSet } from './buffer/Types';
 import { CoreService } from './services/CoreService';
 import { MouseStateService } from './services/MouseStateService';
+import { UnicodeV6 } from './input/UnicodeV6';
 import { UnicodeService } from './services/UnicodeService';
 import { CharsetService } from './services/CharsetService';
 import { updateWindowsModeWrappedState } from './WindowsMode';
-import { IFunctionIdentifier, IParams } from './parser/Types';
+import { IFunctionIdentifier } from './parser/Types';
-import { IBufferSet } from './buffer/Types';
 import { InputHandler } from './InputHandler';
 import { WriteBuffer } from './input/WriteBuffer';
 import { OscLinkService } from './services/OscLinkService';
@@ -43,6 +44,20 @@ import { Disposable, MutableDisposable, toDisposable } from './Lifecycle';
 // Only trigger this warning a single time per session
 let hasWriteSyncWarnHappened = false;
 
+export interface ICoreTerminal {
+  mouseStateService: IMouseStateService;
+  coreService: ICoreService;
+  optionsService: IOptionsService;
+  unicodeService: IUnicodeService;
+  buffers: IBufferSet;
+  options: Required<ITerminalOptions>;
+  registerCsiHandler(id: IFunctionIdentifier, callback: (params: IParams) => boolean | Promise<boolean>): IDisposable;
+  registerDcsHandler(id: IFunctionIdentifier, callback: (data: string, param: IParams) => boolean | Promise<boolean>): IDisposable;
+  registerEscHandler(id: IFunctionIdentifier, callback: () => boolean | Promise<boolean>): IDisposable;
+  registerOscHandler(ident: number, callback: (data: string) => boolean | Promise<boolean>): IDisposable;
+  registerApcHandler(id: IFunctionIdentifier, callback: (data: string) => boolean | Promise<boolean>): IDisposable;
+}
+
 export abstract class CoreTerminal extends Disposable implements ICoreTerminal {
   protected readonly _instantiationService: IInstantiationService;
   protected readonly _bufferService: IBufferService;
@@ -116,6 +131,7 @@ export abstract class CoreTerminal extends Disposable implements ICoreTerminal {
     this.mouseStateService = this._register(this._instantiationService.createInstance(MouseStateService));
     this._instantiationService.setService(IMouseStateService, this.mouseStateService);
     this.unicodeService = this._register(this._instantiationService.createInstance(UnicodeService));
+    this.unicodeService.register(new UnicodeV6());
     this._instantiationService.setService(IUnicodeService, this.unicodeService);
     this._charsetService = this._instantiationService.createInstance(CharsetService);
     this._instantiationService.setService(ICharsetService, this._charsetService);

src/common/InputHandler.test.ts

@@ -5,7 +5,8 @@
 
 import { assert } from 'chai';
 import { InputHandler } from './InputHandler';
-import { IBufferLine, IAttributeData, IColorEvent, ColorRequestType, SpecialColorIndex } from './Types';
+import { IColorEvent, ColorRequestType, SpecialColorIndex } from './Types';
+import { IAttributeData, IBufferLine } from './buffer/Types';
 import { DEFAULT_ATTR_DATA } from './buffer/BufferLine';
 import { CellData } from './buffer/CellData';
 import { Attributes, BgFlags, UnderlineStyle } from './buffer/Constants';

src/common/InputHandler.ts

@@ -4,7 +4,8 @@
  * @license MIT
  */
 
-import { IInputHandler, IAttributeData, IDisposable, IWindowOptions, IColorEvent, IParseStack, ColorIndex, ColorRequestType, SpecialColorIndex } from './Types';
+import { IInputHandler, IDisposable, IWindowOptions, IColorEvent, IParseStack, ColorIndex, ColorRequestType, SpecialColorIndex } from './Types';
+import { IAttributeData, IBuffer } from './buffer/Types';
 import { C0, C1 } from './data/EscapeSequences';
 import { CHARSETS, DEFAULT_CHARSET } from './data/Charsets';
 import { EscapeSequenceParser } from './parser/EscapeSequenceParser';
@@ -20,7 +21,6 @@ import { UnicodeService } from './services/UnicodeService';
 import { OscHandler } from './parser/OscParser';
 import { DcsHandler } from './parser/DcsParser';
 import { ApcHandler } from './parser/ApcParser';
-import { IBuffer } from './buffer/Types';
 import { parseColor } from './input/XParseColor';
 import { Emitter } from './Event';
 import { XTERM_VERSION } from './Version';
@@ -3065,7 +3065,7 @@ export class InputHandler extends Disposable implements IInputHandler {
       const idx = slots.shift() as string;
       const spec = slots.shift() as string;
       if (/^\d+$/.exec(idx)) {
-        const index = parseInt(idx);
+        const index = parseInt(idx, 10);
         if (isValidColorIndex(index)) {
           if (spec === '?') {
             event.push({ type: ColorRequestType.REPORT, index });
@@ -3228,7 +3228,7 @@ export class InputHandler extends Disposable implements IInputHandler {
     const slots = data.split(';');
     for (let i = 0; i < slots.length; ++i) {
       if (/^\d+$/.exec(slots[i])) {
-        const index = parseInt(slots[i]);
+        const index = parseInt(slots[i], 10);
         if (isValidColorIndex(index)) {
           event.push({ type: ColorRequestType.RESTORE, index });
         }

src/common/Platform.ts

@@ -41,7 +41,7 @@ export function getSafariVersion(): number {
   if (majorVersion === null || majorVersion.length < 2) {
     return 0;
   }
-  return parseInt(majorVersion[1]);
+  return parseInt(majorVersion[1], 10);
 }
 
 // Find the users platform. We use this to interpret the meta key

src/common/TestUtils.test.ts

@@ -6,9 +6,9 @@
 import { IBufferService, ICoreService, ILogService, IOptionsService, ITerminalOptions, IMouseStateService, ICharsetService, UnicodeCharProperties, UnicodeCharWidth, IUnicodeService, IUnicodeVersionProvider, LogLevelEnum, IDecorationService, IInternalDecoration, IOscLinkService, type IBufferResizeEvent } from './services/Services';
 import { UnicodeService } from './services/UnicodeService';
 import { DEFAULT_OPTIONS } from './services/OptionsService';
-import { IBufferSet, IBuffer } from './buffer/Types';
+import { IAttributeData, IBuffer, IBufferLine, IBufferSet, IExtendedAttrs } from './buffer/Types';
 import { BufferSet } from './buffer/BufferSet';
-import { IDecPrivateModes, ICoreMouseEvent, CoreMouseEventType, ICharset, IModes, IAttributeData, IOscLinkData, IDisposable, IBufferLine, IExtendedAttrs } from './Types';
+import { IDecPrivateModes, ICoreMouseEvent, CoreMouseEventType, ICharset, IModes, IOscLinkData, IDisposable } from './Types';
 import { UnicodeV6 } from './input/UnicodeV6';
 import { IDecorationOptions, IDecoration } from '@xterm/xterm';
 import { Emitter, type IEvent } from './Event';

src/common/Types.ts

@@ -3,26 +3,32 @@
  * @license MIT
  */
 
-import { IDeleteEvent, IInsertEvent } from './CircularList';
-import { UnderlineStyle } from './buffer/Constants';
-import { IBufferSet } from './buffer/Types';
-import { IParams } from './parser/Types';
-import { IMouseStateService, ICoreService, IOptionsService, IUnicodeService } from './services/Services';
 import { IFunctionIdentifier, ITerminalOptions as IPublicTerminalOptions } from '@xterm/xterm';
-import type { Emitter, IEvent } from './Event';
+import type { IEvent } from './Event';
 
-export interface ICoreTerminal {
+/** sequence params serialized to js arrays */
-  mouseStateService: IMouseStateService;
+export type ParamsArray = (number | number[])[];
-  coreService: ICoreService;
+
-  optionsService: IOptionsService;
+/** Interface of Params storage class. */
-  unicodeService: IUnicodeService;
+export interface IParams {
-  buffers: IBufferSet;
+  /** from ctor */
-  options: Required<ITerminalOptions>;
+  maxLength: number;
-  registerCsiHandler(id: IFunctionIdentifier, callback: (params: IParams) => boolean | Promise<boolean>): IDisposable;
+  maxSubParamsLength: number;
-  registerDcsHandler(id: IFunctionIdentifier, callback: (data: string, param: IParams) => boolean | Promise<boolean>): IDisposable;
+
-  registerEscHandler(id: IFunctionIdentifier, callback: () => boolean | Promise<boolean>): IDisposable;
+  /** param values and its length */
-  registerOscHandler(ident: number, callback: (data: string) => boolean | Promise<boolean>): IDisposable;
+  params: Int32Array;
-  registerApcHandler(id: IFunctionIdentifier, callback: (data: string) => boolean | Promise<boolean>): IDisposable;
+  length: number;
+
+  /** methods */
+  clone(): IParams;
+  toArray(): ParamsArray;
+  reset(): void;
+  resetZdm(): void;
+  addParam(value: number): void;
+  addSubParam(value: number): void;
+  hasSubParams(idx: number): boolean;
+  getSubParams(idx: number): Int32Array | null;
+  getSubParamsAll(): {[idx: number]: Int32Array};
 }
 
 export interface IDisposable {
@@ -62,28 +68,6 @@ export interface IScrollEvent {
   position: number;
 }
 
-export interface ICircularList<T> {
-  length: number;
-  maxLength: number;
-  isFull: boolean;
-
-  onDeleteEmitter: Emitter<IDeleteEvent>;
-  onDelete: IEvent<IDeleteEvent>;
-  onInsertEmitter: Emitter<IInsertEvent>;
-  onInsert: IEvent<IInsertEvent>;
-  onTrimEmitter: Emitter<number>;
-  onTrim: IEvent<number>;
-
-  get(index: number): T | undefined;
-  set(index: number, value: T): void;
-  push(value: T): void;
-  recycle(): T;
-  pop(): T | undefined;
-  splice(start: number, deleteCount: number, ...items: T[]): void;
-  trimStart(count: number): void;
-  shiftElements(start: number, count: number, offset: number): void;
-}
-
 export const enum KeyboardResultType {
   SEND_KEY,
   SELECT_ALL,
@@ -101,24 +85,12 @@ export interface ICharset {
   [key: string]: string | undefined;
 }
 
-export type CharData = [attr: number, char: string, width: number, code: number];
-
 export interface IColor {
   readonly css: string;
   readonly rgba: number; // 32-bit int with rgba in each byte
 }
 export type IColorRGB = [red: number, green: number, blue: number];
 
-export interface IExtendedAttrs {
-  ext: number;
-  underlineStyle: UnderlineStyle;
-  underlineColor: number;
-  underlineVariantOffset: number;
-  urlId: number;
-  clone(): IExtendedAttrs;
-  isEmpty(): boolean;
-}
-
 /**
  * Tracks the current hyperlink. Since these are treated as extended attirbutes, these get passed on
  * to the linkifier when anything is printed. Doing it this way ensures that even when the cursor
@@ -130,136 +102,6 @@ export interface IOscLinkData {
   uri: string;
 }
 
-/**
- * An object that represents all attributes of a cell.
- */
-export interface IAttributeData {
-  /**
-   * "fg" is a 32-bit unsigned integer that stores the foreground color of the cell in the 24 least
-   * significant bits and additional flags in the remaining 8 bits.
-   */
-  fg: number;
-  /**
-   * "bg" is a 32-bit unsigned integer that stores the background color of the cell in the 24 least
-   * significant bits and additional flags in the remaining 8 bits.
-   */
-  bg: number;
-  /**
-   * "extended", aka "ext", stores extended attributes beyond those available in fg and bg. This
-   * data is optional on a cell and encodes less common data.
-   */
-  extended: IExtendedAttrs;
-
-  clone(): IAttributeData;
-
-  // flags
-  isInverse(): number;
-  isBold(): number;
-  isUnderline(): number;
-  isBlink(): number;
-  isInvisible(): number;
-  isItalic(): number;
-  isDim(): number;
-  isStrikethrough(): number;
-  isProtected(): number;
-  isOverline(): number;
-
-  /**
-   * The color mode of the foreground color which determines how to decode {@link getFgColor},
-   * possible values include {@link Attributes.CM_DEFAULT}, {@link Attributes.CM_P16},
-   * {@link Attributes.CM_P256} and {@link Attributes.CM_RGB}.
-   */
-  getFgColorMode(): number;
-  /**
-   * The color mode of the background color which determines how to decode {@link getBgColor},
-   * possible values include {@link Attributes.CM_DEFAULT}, {@link Attributes.CM_P16},
-   * {@link Attributes.CM_P256} and {@link Attributes.CM_RGB}.
-   */
-  getBgColorMode(): number;
-  isFgRGB(): boolean;
-  isBgRGB(): boolean;
-  isFgPalette(): boolean;
-  isBgPalette(): boolean;
-  isFgDefault(): boolean;
-  isBgDefault(): boolean;
-  isAttributeDefault(): boolean;
-
-  /**
-   * Gets an integer representation of the foreground color, how to decode the color depends on the
-   * color mode {@link getFgColorMode}.
-   */
-  getFgColor(): number;
-  /**
-   * Gets an integer representation of the background color, how to decode the color depends on the
-   * color mode {@link getBgColorMode}.
-   */
-  getBgColor(): number;
-
-  // extended attrs
-  hasExtendedAttrs(): number;
-  updateExtended(): void;
-  getUnderlineColor(): number;
-  getUnderlineColorMode(): number;
-  isUnderlineColorRGB(): boolean;
-  isUnderlineColorPalette(): boolean;
-  isUnderlineColorDefault(): boolean;
-  getUnderlineStyle(): number;
-  getUnderlineVariantOffset(): number;
-}
-
-/** Cell data */
-export interface ICellData extends IAttributeData {
-  content: number;
-  combinedData: string;
-  isCombined(): number;
-  getWidth(): number;
-  getChars(): string;
-  getCode(): number;
-  setFromCharData(value: CharData): void;
-  getAsCharData(): CharData;
-}
-
-/**
- * Interface for a line in the terminal buffer.
- */
-export interface IBufferLine {
-  length: number;
-  isWrapped: boolean;
-  get(index: number): CharData;
-  set(index: number, value: CharData): void;
-  loadCell(index: number, cell: ICellData): ICellData;
-  setCell(index: number, cell: ICellData): void;
-  setCellFromCodepoint(index: number, codePoint: number, width: number, attrs: IAttributeData): void;
-  addCodepointToCell(index: number, codePoint: number, width: number): void;
-  insertCells(pos: number, n: number, ch: ICellData): void;
-  deleteCells(pos: number, n: number, fill: ICellData): void;
-  replaceCells(start: number, end: number, fill: ICellData, respectProtect?: boolean): void;
-  resize(cols: number, fill: ICellData): boolean;
-  cleanupMemory(): number;
-  fill(fillCellData: ICellData, respectProtect?: boolean): void;
-  copyFrom(line: IBufferLine): void;
-  clone(): IBufferLine;
-  getTrimmedLength(): number;
-  getNoBgTrimmedLength(): number;
-  translateToString(trimRight?: boolean, startCol?: number, endCol?: number, outColumns?: number[]): string;
-
-  /* direct access to cell attrs */
-  getWidth(index: number): number;
-  hasWidth(index: number): number;
-  getFg(index: number): number;
-  getBg(index: number): number;
-  hasContent(index: number): number;
-  getCodePoint(index: number): number;
-  isCombined(index: number): number;
-  getString(index: number): string;
-}
-
-export interface IMarker extends IDisposable {
-  readonly id: number;
-  readonly isDisposed: boolean;
-  readonly line: number;
-  onDispose: IEvent<void>;
-}
 export interface IModes {
   insertMode: boolean;
 }

src/common/buffer/AttributeData.ts

@@ -3,7 +3,8 @@
  * @license MIT
  */
 
-import { IAttributeData, IColorRGB, IExtendedAttrs } from '../Types';
+import { IColorRGB } from '../Types';
+import { IAttributeData, IExtendedAttrs } from './Types';
 import { Attributes, FgFlags, BgFlags, UnderlineStyle, ExtFlags } from './Constants';
 
 export class AttributeData implements IAttributeData {

src/common/buffer/Buffer.ts

@@ -6,7 +6,8 @@
 import { CircularList, IInsertEvent } from '../CircularList';
 import { Disposable, toDisposable } from '../Lifecycle';
 import { IdleTaskQueue } from '../TaskQueue';
-import { IAttributeData, IBufferLine, ICellData, ICharset } from '../Types';
+import { ICharset } from '../Types';
+import { IAttributeData, IBuffer, IBufferLine, ICellData } from './Types';
 import { ExtendedAttrs } from './AttributeData';
 import { BufferLine, DEFAULT_ATTR_DATA } from './BufferLine';
 import { BufferLineStringCache } from './BufferLineStringCache';
@@ -14,7 +15,6 @@ import { getWrappedLineTrimmedLength, reflowLargerApplyNewLayout, reflowLargerCr
 import { CellData } from './CellData';
 import { NULL_CELL_CHAR, NULL_CELL_CODE, NULL_CELL_WIDTH, WHITESPACE_CELL_CHAR, WHITESPACE_CELL_CODE, WHITESPACE_CELL_WIDTH } from './Constants';
 import { Marker } from './Marker';
-import { IBuffer } from './Types';
 import { DEFAULT_CHARSET } from '../data/Charsets';
 import { IBufferService, ILogService, IOptionsService } from '../services/Services';
 

src/common/buffer/BufferLine.test.ts

@@ -6,7 +6,7 @@ import { NULL_CELL_CHAR, NULL_CELL_WIDTH, NULL_CELL_CODE, DEFAULT_ATTR, Content,
 import { BufferLine } from './BufferLine';
 import { BufferLineStringCache } from './BufferLineStringCache';
 import { CellData } from './CellData';
-import { CharData, IBufferLine, ICellData } from '../Types';
+import { CharData, IBufferLine, ICellData } from './Types';
 import { assert } from 'chai';
 import { AttributeData } from './AttributeData';
 import { createCellData, NULL_CELL_DATA, extendedAttributes } from '../TestUtils.test';

src/common/buffer/BufferLine.ts

@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { CharData, IAttributeData, IBufferLine, ICellData, IExtendedAttrs } from '../Types';
+import { CharData, IAttributeData, IBufferLine, ICellData, IExtendedAttrs } from './Types';
 import { AttributeData } from './AttributeData';
 import { CellData } from './CellData';
 import { Attributes, BgFlags, CHAR_DATA_ATTR_INDEX, CHAR_DATA_CHAR_INDEX, CHAR_DATA_WIDTH_INDEX, Content, NULL_CELL_CHAR, NULL_CELL_CODE, NULL_CELL_WIDTH, WHITESPACE_CELL_CHAR } from './Constants';

src/common/buffer/BufferReflow.ts

@@ -5,7 +5,7 @@
 
 import { BufferLine } from './BufferLine';
 import { CircularList } from '../CircularList';
-import { IBufferLine, ICellData } from '../Types';
+import { IBufferLine, ICellData } from './Types';
 
 export interface INewLayoutResult {
   layout: number[];

src/common/buffer/BufferSet.ts

@@ -4,9 +4,8 @@
  */
 
 import { Disposable, MutableDisposable } from '../Lifecycle';
-import { IAttributeData } from '../Types';
 import { Buffer } from './Buffer';
-import { IBuffer, IBufferSet } from './Types';
+import { IAttributeData, IBuffer, IBufferSet } from './Types';
 import { IBufferService, ILogService, IOptionsService } from '../services/Services';
 import { Emitter } from '../Event';
 

src/common/buffer/CellData.ts

@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { CharData, ICellData, IExtendedAttrs } from '../Types';
+import { CharData, ICellData, IExtendedAttrs } from './Types';
 import { stringFromCodePoint } from '../input/TextDecoder';
 import { CHAR_DATA_CHAR_INDEX, CHAR_DATA_WIDTH_INDEX, CHAR_DATA_ATTR_INDEX, Content } from './Constants';
 import { AttributeData, ExtendedAttrs } from './AttributeData';

src/common/buffer/Marker.ts

@@ -3,9 +3,9 @@
  * @license MIT
  */
 
-import { IDisposable, IMarker } from '../Types';
+import { dispose, IDisposable } from '../Lifecycle';
+import { IMarker } from './Types';
 import { Emitter } from '../Event';
-import { dispose } from '../Lifecycle';
 
 export class Marker implements IMarker {
   private static _nextId = 1;

src/common/buffer/Types.ts

@@ -3,12 +3,158 @@
  * @license MIT
  */
 
-import { IAttributeData, ICircularList, IBufferLine, ICellData, IMarker, ICharset, IDisposable } from '../Types';
 import type { IEvent } from '../Event';
+import type { ICircularList } from '../CircularList';
+import type { ICharset } from '../Types';
+import type { IDisposable } from '../Lifecycle';
+import type { UnderlineStyle } from './Constants';
 
 // BufferIndex denotes a position in the buffer: [rowIndex, colIndex]
 export type BufferIndex = [number, number];
 
+export type CharData = [attr: number, char: string, width: number, code: number];
+
+export interface IExtendedAttrs {
+  ext: number;
+  underlineStyle: UnderlineStyle;
+  underlineColor: number;
+  underlineVariantOffset: number;
+  urlId: number;
+  clone(): IExtendedAttrs;
+  isEmpty(): boolean;
+}
+
+/**
+ * An object that represents all attributes of a cell.
+ */
+export interface IAttributeData {
+  /**
+   * "fg" is a 32-bit unsigned integer that stores the foreground color of the cell in the 24 least
+   * significant bits and additional flags in the remaining 8 bits.
+   */
+  fg: number;
+  /**
+   * "bg" is a 32-bit unsigned integer that stores the background color of the cell in the 24 least
+   * significant bits and additional flags in the remaining 8 bits.
+   */
+  bg: number;
+  /**
+   * "extended", aka "ext", stores extended attributes beyond those available in fg and bg. This
+   * data is optional on a cell and encodes less common data.
+   */
+  extended: IExtendedAttrs;
+
+  clone(): IAttributeData;
+
+  // flags
+  isInverse(): number;
+  isBold(): number;
+  isUnderline(): number;
+  isBlink(): number;
+  isInvisible(): number;
+  isItalic(): number;
+  isDim(): number;
+  isStrikethrough(): number;
+  isProtected(): number;
+  isOverline(): number;
+
+  /**
+   * The color mode of the foreground color which determines how to decode {@link getFgColor},
+   * possible values include {@link Attributes.CM_DEFAULT}, {@link Attributes.CM_P16},
+   * {@link Attributes.CM_P256} and {@link Attributes.CM_RGB}.
+   */
+  getFgColorMode(): number;
+  /**
+   * The color mode of the background color which determines how to decode {@link getBgColor},
+   * possible values include {@link Attributes.CM_DEFAULT}, {@link Attributes.CM_P16},
+   * {@link Attributes.CM_P256} and {@link Attributes.CM_RGB}.
+   */
+  getBgColorMode(): number;
+  isFgRGB(): boolean;
+  isBgRGB(): boolean;
+  isFgPalette(): boolean;
+  isBgPalette(): boolean;
+  isFgDefault(): boolean;
+  isBgDefault(): boolean;
+  isAttributeDefault(): boolean;
+
+  /**
+   * Gets an integer representation of the foreground color, how to decode the color depends on the
+   * color mode {@link getFgColorMode}.
+   */
+  getFgColor(): number;
+  /**
+   * Gets an integer representation of the background color, how to decode the color depends on the
+   * color mode {@link getBgColorMode}.
+   */
+  getBgColor(): number;
+
+  // extended attrs
+  hasExtendedAttrs(): number;
+  updateExtended(): void;
+  getUnderlineColor(): number;
+  getUnderlineColorMode(): number;
+  isUnderlineColorRGB(): boolean;
+  isUnderlineColorPalette(): boolean;
+  isUnderlineColorDefault(): boolean;
+  getUnderlineStyle(): number;
+  getUnderlineVariantOffset(): number;
+}
+
+/** Cell data */
+export interface ICellData extends IAttributeData {
+  content: number;
+  combinedData: string;
+  isCombined(): number;
+  getWidth(): number;
+  getChars(): string;
+  getCode(): number;
+  setFromCharData(value: CharData): void;
+  getAsCharData(): CharData;
+}
+
+/**
+ * Interface for a line in the terminal buffer.
+ */
+export interface IBufferLine {
+  length: number;
+  isWrapped: boolean;
+  get(index: number): CharData;
+  set(index: number, value: CharData): void;
+  loadCell(index: number, cell: ICellData): ICellData;
+  setCell(index: number, cell: ICellData): void;
+  setCellFromCodepoint(index: number, codePoint: number, width: number, attrs: IAttributeData): void;
+  addCodepointToCell(index: number, codePoint: number, width: number): void;
+  insertCells(pos: number, n: number, ch: ICellData): void;
+  deleteCells(pos: number, n: number, fill: ICellData): void;
+  replaceCells(start: number, end: number, fill: ICellData, respectProtect?: boolean): void;
+  resize(cols: number, fill: ICellData): boolean;
+  cleanupMemory(): number;
+  fill(fillCellData: ICellData, respectProtect?: boolean): void;
+  copyFrom(line: IBufferLine): void;
+  clone(): IBufferLine;
+  getTrimmedLength(): number;
+  getNoBgTrimmedLength(): number;
+  translateToString(trimRight?: boolean, startCol?: number, endCol?: number, outColumns?: number[]): string;
+
+  /* direct access to cell attrs */
+  getWidth(index: number): number;
+  hasWidth(index: number): number;
+  getFg(index: number): number;
+  getBg(index: number): number;
+  hasContent(index: number): number;
+  getCodePoint(index: number): number;
+  isCombined(index: number): number;
+  getString(index: number): string;
+}
+
+export interface IMarker extends IDisposable {
+  readonly id: number;
+  readonly isDisposed: boolean;
+  readonly line: number;
+  onDispose: IEvent<void>;
+}
+
 export interface IBuffer {
   readonly lines: ICircularList<IBufferLine>;
   ydisp: number;

src/common/input/UnicodeV6.ts

@@ -132,6 +132,7 @@ export class UnicodeV6 implements IUnicodeVersionProvider {
   public charProperties(codepoint: number, preceding: UnicodeCharProperties): UnicodeCharProperties {
     let width = this.wcwidth(codepoint);
     let shouldJoin = width === 0 && preceding !== 0;
+    // HACK: Ideally this file would not depend on the service which uses it
     if (shouldJoin) {
       const oldWidth = UnicodeService.extractWidth(preceding);
       if (oldWidth === 0) {

src/common/parser/Types.ts

@@ -3,12 +3,10 @@
  * @license MIT
  */
 
-import { IDisposable } from '../Types';
+import { IDisposable, IParams, ParamsArray } from '../Types';
 import { ParserState } from './Constants';
 
-
+export type { IParams, ParamsArray };
-/** sequence params serialized to js arrays */
-export type ParamsArray = (number | number[])[];
 
 /** Params constructor type. */
 export interface IParamsConstructor {
@@ -18,28 +16,6 @@ export interface IParamsConstructor {
   fromArray(values: ParamsArray): IParams;
 }
 
-/** Interface of Params storage class. */
-export interface IParams {
-  /** from ctor */
-  maxLength: number;
-  maxSubParamsLength: number;
-
-  /** param values and its length */
-  params: Int32Array;
-  length: number;
-
-  /** methods */
-  clone(): IParams;
-  toArray(): ParamsArray;
-  reset(): void;
-  resetZdm(): void;
-  addParam(value: number): void;
-  addSubParam(value: number): void;
-  hasSubParams(idx: number): boolean;
-  getSubParams(idx: number): Int32Array | null;
-  getSubParamsAll(): {[idx: number]: Int32Array};
-}
-
 /**
  * Internal state of EscapeSequenceParser.
  * Used as argument of the error handler to allow

src/common/public/BufferLineApiView.ts

@@ -4,7 +4,7 @@
  */
 
 import { CellData } from '../buffer/CellData';
-import { IBufferLine, ICellData } from '../Types';
+import { IBufferLine, ICellData } from '../buffer/Types';
 import { IBufferCell as IBufferCellApi, IBufferLine as IBufferLineApi } from '@xterm/xterm';
 
 export class BufferLineApiView implements IBufferLineApi {

src/common/public/BufferNamespaceApi.ts

@@ -5,7 +5,7 @@
 
 import { IBuffer as IBufferApi, IBufferNamespace as IBufferNamespaceApi } from '@xterm/xterm';
 import { BufferApiView } from './BufferApiView';
-import { ICoreTerminal } from '../Types';
+import { ICoreTerminal } from '../CoreTerminal';
 import { Disposable } from '../Lifecycle';
 import { Emitter } from '../Event';
 

src/common/public/ParserApi.ts

@@ -5,7 +5,7 @@
 
 import { IParams } from '../parser/Types';
 import { IDisposable, IFunctionIdentifier, IParser } from '@xterm/xterm';
-import { ICoreTerminal } from '../Types';
+import { ICoreTerminal } from '../CoreTerminal';
 
 export class ParserApi implements IParser {
   constructor(private _core: ICoreTerminal) { }

src/common/public/UnicodeApi.ts

@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { ICoreTerminal } from '../Types';
+import { ICoreTerminal } from '../CoreTerminal';
 import { IUnicodeHandling, IUnicodeVersionProvider } from '@xterm/xterm';
 
 export class UnicodeApi implements IUnicodeHandling {

src/common/services/BufferService.ts

@@ -4,9 +4,8 @@
  */
 
 import { Disposable } from '../Lifecycle';
-import { IAttributeData, IBufferLine } from '../Types';
+import { IAttributeData, IBuffer, IBufferLine, IBufferSet } from '../buffer/Types';
 import { BufferSet } from '../buffer/BufferSet';
-import { IBuffer, IBufferSet } from '../buffer/Types';
 import { IBufferService, ILogService, IOptionsService, type IBufferResizeEvent } from './Services';
 import { Emitter } from '../Event';
 

src/common/services/DecorationService.test.ts

@@ -5,7 +5,7 @@
 
 import { assert } from 'chai';
 import { DecorationLineCache, DecorationService } from './DecorationService';
-import { IMarker } from '../Types';
+import { IMarker } from '../buffer/Types';
 import { Disposable } from '../Lifecycle';
 import { Emitter } from '../Event';
 import { MockLogService, MockBufferService, MockOptionsService } from '../TestUtils.test';

src/common/services/DecorationService.ts

@@ -3,13 +3,13 @@
  * @license MIT
  */
 
-import type { IDeleteEvent, IInsertEvent } from '../CircularList';
+import type { ICircularList, IDeleteEvent, IInsertEvent } from '../CircularList';
 import { MicrotaskTimer } from '../Async';
 import { css } from '../Color';
 import { Disposable, DisposableStore, MutableDisposable, toDisposable } from '../Lifecycle';
 import { IBufferService, IDecorationService, IInternalDecoration, ILogService } from './Services';
 import { SortedList } from '../SortedList';
-import { IColor, ICircularList } from '../Types';
+import { IColor } from '../Types';
 import { IDecoration, IDecorationOptions, IMarker } from '@xterm/xterm';
 import { Emitter } from '../Event';
 

src/common/services/InstantiationService.ts

@@ -9,8 +9,8 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { IInstantiationService, IServiceIdentifier } from './Services';
+import { IInstantiationService } from './Services';
-import { getServiceDependencies } from './ServiceRegistry';
+import { IServiceIdentifier, getServiceDependencies } from './ServiceRegistry';
 
 export class ServiceCollection {
 

src/common/services/OscLinkService.ts

@@ -3,7 +3,8 @@
  * @license MIT
  */
 import { IBufferService, IOscLinkService } from './Services';
-import { IMarker, IOscLinkData } from '../Types';
+import { IOscLinkData } from '../Types';
+import { IMarker } from '../buffer/Types';
 
 export class OscLinkService implements IOscLinkService {
   public serviceBrand: any;

src/common/services/ServiceRegistry.ts

@@ -9,7 +9,11 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { IServiceIdentifier } from './Services';
+export interface IServiceIdentifier<T> {
+  (...args: any[]): void;
+  type: T;
+  _id: string;
+}
 
 const enum Constants {
   DI_TARGET = 'di$target',

src/common/services/Services.ts

@@ -4,9 +4,9 @@
  */
 
 import type { IDecoration, IDecorationOptions, ILinkHandler, ILogger, IWindowsPty, IOverviewRulerOptions } from '@xterm/xterm';
-import { CoreMouseEncoding, CoreMouseEventType, CursorInactiveStyle, CursorStyle, IAttributeData, ICharset, IColor, ICoreMouseEvent, ICoreMouseProtocol, IDecPrivateModes, IDisposable, IKittyKeyboardState, IModes, IOscLinkData, IWindowOptions } from '../Types';
+import { CoreMouseEncoding, CoreMouseEventType, CursorInactiveStyle, CursorStyle, ICharset, IColor, ICoreMouseEvent, ICoreMouseProtocol, IDecPrivateModes, IDisposable, IKittyKeyboardState, IModes, IOscLinkData, IWindowOptions } from '../Types';
-import { IBuffer, IBufferSet } from '../buffer/Types';
+import { IAttributeData, IBuffer, IBufferSet } from '../buffer/Types';
-import { createDecorator } from './ServiceRegistry';
+import { createDecorator, IServiceIdentifier } from './ServiceRegistry';
 import type { Emitter, IEvent } from '../Event';
 
 export const IBufferService = createDecorator<IBufferService>('BufferService');
@@ -119,12 +119,6 @@ export interface ICharsetService {
   setgCharset(g: number, charset: ICharset | undefined): void;
 }
 
-export interface IServiceIdentifier<T> {
-  (...args: any[]): void;
-  type: T;
-  _id: string;
-}
-
 export interface IBrandedService {
   serviceBrand: undefined;
 }

src/common/services/UnicodeService.test.ts

@@ -4,6 +4,7 @@
  */
 
 import { assert } from 'chai';
+import { UnicodeV6 } from '../input/UnicodeV6';
 import { UnicodeService } from './UnicodeService';
 import { IUnicodeVersionProvider } from './Services';
 
@@ -21,6 +22,7 @@ describe('unicode provider', () => {
   let us: UnicodeService;
   beforeEach(() => {
     us = new UnicodeService();
+    us.register(new UnicodeV6());
   });
   it('default to V6', () => {
     assert.equal(us.activeVersion, '6');

src/common/services/UnicodeService.ts

@@ -3,7 +3,6 @@
  * @license MIT
  */
 
-import { UnicodeV6 } from '../input/UnicodeV6';
 import { IUnicodeService, IUnicodeVersionProvider, UnicodeCharProperties, UnicodeCharWidth } from './Services';
 import { Emitter } from '../Event';
 
@@ -12,7 +11,7 @@ export class UnicodeService implements IUnicodeService {
 
   private _providers: {[key: string]: IUnicodeVersionProvider} = Object.create(null);
   private _active: string = '';
-  private _activeProvider: IUnicodeVersionProvider;
+  private _activeProvider!: IUnicodeVersionProvider;
 
   private readonly _onChange = new Emitter<string>();
   public readonly onChange = this._onChange.event;
@@ -30,13 +29,6 @@ export class UnicodeService implements IUnicodeService {
     return ((state & 0xffffff) << 3) | ((width & 3) << 1) | (shouldJoin?1:0);
   }
 
-  constructor() {
-    const defaultProvider = new UnicodeV6();
-    this.register(defaultProvider);
-    this._active = defaultProvider.version;
-    this._activeProvider = defaultProvider;
-  }
-
   public dispose(): void {
     this._onChange.dispose();
   }
@@ -60,6 +52,9 @@ export class UnicodeService implements IUnicodeService {
 
   public register(provider: IUnicodeVersionProvider): void {
     this._providers[provider.version] = provider;
+    if (!this._active) {
+      this.activeVersion = provider.version;
+    }
   }
 
   /**

src/headless/Terminal.ts

@@ -22,9 +22,9 @@
  */
 
 import { DEFAULT_ATTR_DATA } from '../common/buffer/BufferLine';
-import { IBuffer } from '../common/buffer/Types';
+import { IBuffer, IMarker } from '../common/buffer/Types';
 import { CoreTerminal } from '../common/CoreTerminal';
-import { IMarker, ITerminalOptions } from '../common/Types';
+import { ITerminalOptions } from '../common/Types';
 import { Emitter, EventUtils } from '../common/Event';
 
 export class Terminal extends CoreTerminal {

test/playwright/TestUtils.ts

@@ -7,7 +7,9 @@ import { Browser, JSHandle, Page } from '@playwright/test';
 import { deepStrictEqual, strictEqual } from 'assert';
 import type { IRenderDimensions as IRenderDimensionsInternal } from '../../src/browser/renderer/shared/Types';
 import type { IRenderService } from '../../src/browser/services/Services';
-import type { ICoreTerminal, IDisposable, IMarker } from '../../src/common/Types';
+import type { IDisposable } from '../../src/common/Types';
+import type { IMarker } from '../../src/common/buffer/Types';
+import type { ICoreTerminal } from '../../src/common/CoreTerminal';
 import * as playwright from '@playwright/test';
 import { IBuffer, IBufferCell, IBufferLine, IBufferNamespace, IBufferRange, IDecoration, IDecorationOptions, IModes, IRenderDimensions, ITerminalInitOnlyOptions, ITerminalOptions, Terminal } from '@xterm/xterm';