"use strict";
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const virtualCore = require("@tanstack/virtual-core");
class VirtualizerControllerBase {
  constructor(host, options) {
    this.cleanup = () => {
    };
    (this.host = host).addController(this);
    const resolvedOptions = {
      ...options,
      onChange: (instance, sync) => {
        var _a;
        this.host.updateComplete.then(() => this.host.requestUpdate());
        (_a = options.onChange) == null ? void 0 : _a.call(options, instance, sync);
      }
    };
    this.virtualizer = new virtualCore.Virtualizer(resolvedOptions);
  }
  getVirtualizer() {
    return this.virtualizer;
  }
  async hostConnected() {
    this.cleanup = this.virtualizer._didMount();
  }
  hostUpdated() {
    this.virtualizer._willUpdate();
  }
  hostDisconnected() {
    this.cleanup();
  }
}
class VirtualizerController extends VirtualizerControllerBase {
  constructor(host, options) {
    super(host, {
      observeElementRect: virtualCore.observeElementRect,
      observeElementOffset: virtualCore.observeElementOffset,
      scrollToFn: virtualCore.elementScroll,
      ...options
    });
  }
}
class WindowVirtualizerController extends VirtualizerControllerBase {
  constructor(host, options) {
    super(host, {
      getScrollElement: () => typeof document !== "undefined" ? window : null,
      observeElementRect: virtualCore.observeWindowRect,
      observeElementOffset: virtualCore.observeWindowOffset,
      scrollToFn: virtualCore.windowScroll,
      initialOffset: () => typeof document !== "undefined" ? window.scrollY : 0,
      ...options
    });
  }
}
exports.VirtualizerController = VirtualizerController;
exports.WindowVirtualizerController = WindowVirtualizerController;
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