120 lines
3.3 KiB
TypeScript
120 lines
3.3 KiB
TypeScript
/**
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* The nodes selection rectangle gets displayed when a user
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* made a selection with on or several nodes
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*/
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import React, { memo, useMemo, useCallback, useRef, MouseEvent } from 'react';
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import cc from 'classcat';
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import shallow from 'zustand/shallow';
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import { useStore } from '../../store';
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import { Node, ReactFlowState } from '../../types';
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import { getRectOfNodes } from '../../utils/graph';
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import useDrag, { UseDragData, UseDragEvent } from '../../hooks/useDrag';
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export interface NodesSelectionProps {
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onSelectionDragStart?: (event: MouseEvent, nodes: Node[]) => void;
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onSelectionDrag?: (event: MouseEvent, nodes: Node[]) => void;
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onSelectionDragStop?: (event: MouseEvent, nodes: Node[]) => void;
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onSelectionContextMenu?: (event: MouseEvent, nodes: Node[]) => void;
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noPanClassName?: string;
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}
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// @TODO: work with nodeInternals instead of converting it to an array
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const selector = (s: ReactFlowState) => ({
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transform: s.transform,
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selectedNodesBbox: s.selectedNodesBbox,
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userSelectionActive: s.userSelectionActive,
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selectedNodes: Array.from(s.nodeInternals.values()).filter((n) => n.selected),
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updateNodePosition: s.updateNodePosition,
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});
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function NodesSelection({
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onSelectionDragStart,
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onSelectionDrag,
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onSelectionDragStop,
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onSelectionContextMenu,
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noPanClassName,
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}: NodesSelectionProps) {
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const { transform, userSelectionActive, selectedNodes, updateNodePosition } = useStore(selector, shallow);
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const [tX, tY, tScale] = transform;
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const nodeRef = useRef(null);
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const style = useMemo(
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() => ({
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transform: `translate(${tX}px,${tY}px) scale(${tScale})`,
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}),
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[tX, tY, tScale]
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);
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const selectedNodesBbox = useMemo(() => getRectOfNodes(selectedNodes), [selectedNodes]);
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const innerStyle = useMemo(
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() => ({
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width: selectedNodesBbox.width,
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height: selectedNodesBbox.height,
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top: selectedNodesBbox.y,
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left: selectedNodesBbox.x,
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}),
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[selectedNodesBbox]
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);
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const onStart = useCallback(
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(event: UseDragEvent) => {
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onSelectionDragStart?.(event.sourceEvent, selectedNodes);
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},
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[onSelectionDragStart, selectedNodes]
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);
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const onDrag = useCallback(
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(event: UseDragEvent, data: UseDragData) => {
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updateNodePosition({
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diff: {
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x: data.dx,
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y: data.dy,
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},
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dragging: true,
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});
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onSelectionDrag?.(event.sourceEvent, selectedNodes);
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},
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[onSelectionDrag, selectedNodes, updateNodePosition]
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);
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const onStop = useCallback(
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(event: UseDragEvent) => {
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updateNodePosition({
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dragging: false,
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});
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onSelectionDragStop?.(event.sourceEvent, selectedNodes);
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},
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[selectedNodes, onSelectionDragStop]
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);
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const onContextMenu = useCallback(
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(event: MouseEvent) => {
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onSelectionContextMenu?.(event, selectedNodes);
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},
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[onSelectionContextMenu, selectedNodes]
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);
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useDrag({
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onStart,
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onDrag,
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onStop,
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nodeRef,
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});
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if (!selectedNodes?.length || userSelectionActive) {
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return null;
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}
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return (
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<div className={cc(['react-flow__nodesselection', 'react-flow__container', noPanClassName])} style={style}>
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<div ref={nodeRef} className="react-flow__nodesselection-rect" onContextMenu={onContextMenu} style={innerStyle} />
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</div>
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);
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}
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export default memo(NodesSelection);
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