visgl / deck.gl / 22867726651

// deck.gl

// SPDX-License-Identifier: MIT

// Copyright (c) vis.gl contributors

import type {Widget} from '@deck.gl/core';

import type {IControl, ControlPosition, Map} from './types';

/**

 * Wraps a deck.gl Widget as a Mapbox/MapLibre IControl.

 *

 * This enables deck widgets to be positioned alongside native map controls

 * in the same DOM container, preventing overlap issues.

 *

 * @internal Used by MapboxOverlay for widgets with `viewId: 'mapbox'`.

 */

export class DeckWidgetControl implements IControl {

  private _widget: Widget;

  private _container: HTMLDivElement | null = null;

  constructor(widget: Widget) {

    this._widget = widget;

  }

  /**

   * Called when the control is added to the map.

   * Creates a container element that will be positioned by Mapbox/MapLibre,

   * and sets the widget's _container prop so WidgetManager appends the widget here.

   */

  onAdd(map: Map): HTMLElement {

    this._container = document.createElement('div');

    this._container.className = 'maplibregl-ctrl mapboxgl-ctrl deck-widget-ctrl';

    // Set _container so WidgetManager appends the widget's rootElement here

    // instead of in its own overlay container

    this._widget.props._container = this._container;

    return this._container;

  }

  /**

   * Called when the control is removed from the map.

   */

  onRemove(): void {

    // Clear the _container reference so widget doesn't try to append there

    if (this._widget.props._container === this._container) {

      this._widget.props._container = null;

    }

    this._container?.remove();

    this._container = null;

  }

  /**

   * Returns the default position for this control.

   * Uses the widget's placement, which conveniently matches Mapbox control positions.

   * Note: 'fill' placement is not supported by Mapbox controls, defaults to 'top-left'.

   */

  getDefaultPosition(): ControlPosition {

    const placement = this._widget.placement;

    // 'fill' is not a valid Mapbox control position

    return placement;

  }

  /** Returns the wrapped widget */

  get widget(): Widget {

    return this._widget;

  }

  /**

   * Updates the wrapped widget reference.

   * Used when reusing this control for a new widget instance with the same id.

   */

  setWidget(widget: Widget): void {

    this._widget = widget;

  }

}