chore: setup monorepo using preconstruct

packages/core/src/components/Nodes/utils.ts

@@ -0,0 +1,83 @@
+import { MouseEvent } from 'react';
+import { GetState, SetState } from 'zustand';
+
+import { HandleElement, Node, Position, ReactFlowState } from '../../types';
+import { getDimensions } from '../../utils';
+
+export const getHandleBounds = (nodeElement: HTMLDivElement, scale: number) => {
+  const bounds = nodeElement.getBoundingClientRect();
+
+  return {
+    source: getHandleBoundsByHandleType('.source', nodeElement, bounds, scale),
+    target: getHandleBoundsByHandleType('.target', nodeElement, bounds, scale),
+  };
+};
+
+export const getHandleBoundsByHandleType = (
+  selector: string,
+  nodeElement: HTMLDivElement,
+  parentBounds: DOMRect,
+  k: number
+): HandleElement[] | null => {
+  const handles = nodeElement.querySelectorAll(selector);
+
+  if (!handles || !handles.length) {
+    return null;
+  }
+
+  const handlesArray = Array.from(handles) as HTMLDivElement[];
+
+  return handlesArray.map((handle): HandleElement => {
+    const bounds = handle.getBoundingClientRect();
+    const dimensions = getDimensions(handle);
+    const handleId = handle.getAttribute('data-handleid');
+    const handlePosition = handle.getAttribute('data-handlepos') as unknown as Position;
+
+    return {
+      id: handleId,
+      position: handlePosition,
+      x: (bounds.left - parentBounds.left) / k,
+      y: (bounds.top - parentBounds.top) / k,
+      ...dimensions,
+    };
+  });
+};
+
+export function getMouseHandler(
+  id: string,
+  getState: GetState<ReactFlowState>,
+  handler?: (event: MouseEvent, node: Node) => void
+) {
+  return handler === undefined
+    ? handler
+    : (event: MouseEvent) => {
+        const node = getState().nodeInternals.get(id)!;
+        handler(event, { ...node });
+      };
+}
+
+// this handler is called by
+// 1. the click handler when node is not draggable or selectNodesOnDrag = false
+// or
+// 2. the on drag start handler when node is draggable and selectNodesOnDrag = true
+export function handleNodeClick({
+  id,
+  store,
+}: {
+  id: string;
+  store: {
+    getState: GetState<ReactFlowState>;
+    setState: SetState<ReactFlowState>;
+  };
+}) {
+  const { addSelectedNodes, unselectNodesAndEdges, multiSelectionActive, nodeInternals } = store.getState();
+  const node = nodeInternals.get(id)!;
+
+  store.setState({ nodesSelectionActive: false });
+
+  if (!node.selected) {
+    addSelectedNodes([id]);
+  } else if (node.selected && multiSelectionActive) {
+    unselectNodesAndEdges({ nodes: [node] });
+  }
+}