planning

node_modules/dnd-core/lib/classes/DragDropManagerImpl.js

@@ -0,0 +1,59 @@
+import { createDragDropActions } from '../actions/dragDrop';
+export class DragDropManagerImpl {
+    store;
+    monitor;
+    backend;
+    isSetUp = false;
+    constructor(store, monitor) {
+        this.store = store;
+        this.monitor = monitor;
+        store.subscribe(this.handleRefCountChange);
+    }
+    receiveBackend(backend) {
+        this.backend = backend;
+    }
+    getMonitor() {
+        return this.monitor;
+    }
+    getBackend() {
+        return this.backend;
+    }
+    getRegistry() {
+        return this.monitor.registry;
+    }
+    getActions() {
+        /* eslint-disable-next-line @typescript-eslint/no-this-alias */
+        const manager = this;
+        const { dispatch } = this.store;
+        function bindActionCreator(actionCreator) {
+            return (...args) => {
+                const action = actionCreator.apply(manager, args);
+                if (typeof action !== 'undefined') {
+                    dispatch(action);
+                }
+            };
+        }
+        const actions = createDragDropActions(this);
+        return Object.keys(actions).reduce((boundActions, key) => {
+            const action = actions[key];
+            boundActions[key] = bindActionCreator(action);
+            return boundActions;
+        }, {});
+    }
+    dispatch(action) {
+        this.store.dispatch(action);
+    }
+    handleRefCountChange = () => {
+        const shouldSetUp = this.store.getState().refCount > 0;
+        if (this.backend) {
+            if (shouldSetUp && !this.isSetUp) {
+                this.backend.setup();
+                this.isSetUp = true;
+            }
+            else if (!shouldSetUp && this.isSetUp) {
+                this.backend.teardown();
+                this.isSetUp = false;
+            }
+        }
+    };
+}