daggerheart/module/applications/sheets/api/base-actor.mjs

import DHBaseActorSettings from './actor-setting.mjs';
import DHApplicationMixin from './application-mixin.mjs';

const { ActorSheetV2 } = foundry.applications.sheets;

/**@typedef {import('@client/applications/_types.mjs').ApplicationClickAction} ApplicationClickAction */

/**
 * A base actor sheet extending {@link ActorSheetV2} via {@link DHApplicationMixin}
 * @extends ActorSheetV2
 * @mixes DHSheetV2
 */
export default class DHBaseActorSheet extends DHApplicationMixin(ActorSheetV2) {
    /** @inheritDoc */
    static DEFAULT_OPTIONS = {
        classes: ['actor'],
        position: {
            width: 480
        },
        form: {
            submitOnChange: true
        },
        actions: {
            openSettings: DHBaseActorSheet.#openSettings
        },
        dragDrop: [{ dragSelector: '.inventory-item[data-type="attack"]', dropSelector: null }]
    };

    /**@type {typeof DHBaseActorSettings}*/
    #settingSheet;

    /**@returns {DHBaseActorSettings|null} */
    get settingSheet() {
        const SheetClass = this.document.system.metadata.settingSheet;
        return (this.#settingSheet ??= SheetClass ? new SheetClass({ document: this.document }) : null);
    }

    /**@inheritdoc */
    async _prepareContext(_options) {
        const context = await super._prepareContext(_options);
        context.isNPC = this.document.isNPC;
        return context;
    }

    /**
     * Open the Actor Setting Sheet
     * @type {ApplicationClickAction}
     */
    static async #openSettings() {
        await this.settingSheet.render({ force: true });
    }

    /* -------------------------------------------- */
    /*  Application Drag/Drop                       */
    /* -------------------------------------------- */

    /**
     * On dragStart on the item.
     * @param {DragEvent} event - The drag event
     */
    async _onDragStart(event) {
        const attackItem = event.currentTarget.closest('.inventory-item[data-type="attack"]');

        if (attackItem) {
            const attackData = {
                type: 'Attack',
                actorUuid: this.document.uuid,
                img: this.document.system.attack.img,
                fromInternal: true
            };
            event.dataTransfer.setData('text/plain', JSON.stringify(attackData));
            event.dataTransfer.setDragImage(attackItem.querySelector('img'), 60, 0);
        }
    }
}