planning

node_modules/react-dnd/lib/hooks/useDrag/DragSourceImpl.js

@@ -0,0 +1,56 @@
+export class DragSourceImpl {
+    spec;
+    monitor;
+    connector;
+    constructor(spec, monitor, connector) {
+        this.spec = spec;
+        this.monitor = monitor;
+        this.connector = connector;
+    }
+    beginDrag() {
+        const spec = this.spec;
+        const monitor = this.monitor;
+        let result = null;
+        if (typeof spec.item === 'object') {
+            result = spec.item;
+        }
+        else if (typeof spec.item === 'function') {
+            result = spec.item(monitor);
+        }
+        else {
+            result = {};
+        }
+        return result ?? null;
+    }
+    canDrag() {
+        const spec = this.spec;
+        const monitor = this.monitor;
+        if (typeof spec.canDrag === 'boolean') {
+            return spec.canDrag;
+        }
+        else if (typeof spec.canDrag === 'function') {
+            return spec.canDrag(monitor);
+        }
+        else {
+            return true;
+        }
+    }
+    isDragging(globalMonitor, target) {
+        const spec = this.spec;
+        const monitor = this.monitor;
+        const { isDragging } = spec;
+        return isDragging
+            ? isDragging(monitor)
+            : target === globalMonitor.getSourceId();
+    }
+    endDrag() {
+        const spec = this.spec;
+        const monitor = this.monitor;
+        const connector = this.connector;
+        const { end } = spec;
+        if (end) {
+            end(monitor.getItem(), monitor);
+        }
+        connector.reconnect();
+    }
+}