Class Ink

src/ink/ink.tsx:85–1800

  onFrame?: (event: FrameEvent) => void;
};
export default class Ink {
  private readonly log: LogUpdate;
  private readonly terminal: Terminal;
  private scheduleRender: (() => void) & {
    cancel?: () => void;
  };
  // Ignore last render after unmounting a tree to prevent empty output before exit
  private isUnmounted = false;
  private isPaused = false;
  private readonly container: FiberRoot;
  private rootNode: dom.DOMElement;
  readonly focusManager: FocusManager;
  private renderer: Renderer;
  private readonly stylePool: StylePool;
  private charPool: CharPool;
  private hyperlinkPool: HyperlinkPool;
  private exitPromise: Promise<void>;
  private restoreConsole?: () => void;
  private restoreStderr?: () => void;
  private readonly unsubscribeTTYHandlers?: () => void;
  private terminalColumns: number;
  private terminalRows: number;
  private currentNode: ReactNode = null;
  private frontFrame: Frame;
  private backFrame: Frame;
  private logicalFrontFrame: Frame;
  private logicalBackFrame: Frame;
  private lastPoolResetTime = performance.now();
  private drainTimer: ReturnType<typeof setTimeout> | null = null;
  private lastYogaCounters: {
    ms: number;
    visited: number;
    measured: number;
    cacheHits: number;
    live: number;
  } = {
    ms: 0,
    visited: 0,
    measured: 0,
    cacheHits: 0,
    live: 0
  };
  // Timestamp of the most recent onRender() call (direct or scheduled).
  // Used in the deferredRender microtask to skip stale renders that were
  // superseded by a direct caller (e.g. forceRedraw) before the microtask ran.
  private lastRenderAt = 0;
  private altScreenParkPatch: Readonly<{
    type: 'stdout';
    content: string;
  }>;
  // Text selection state (alt-screen only). Owned here so the overlay
  // pass in onRender can read it and App.tsx can update it from mouse
  // events. Public so instances.get() callers can access.
  readonly selection: SelectionState = createSelectionState();
  // Search highlight query (alt-screen only). Setter below triggers
  // scheduleRender; applySearchHighlight in onRender inverts matching cells.
  private searchHighlightQuery = '';
  // Position-based highlight. VML scans positions ONCE (via