131 lines
3.6 KiB
TypeScript
131 lines
3.6 KiB
TypeScript
/**
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* The nodes selection rectangle gets displayed when a user
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* made a selectio with on or several nodes
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*/
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import React, { useMemo, useCallback, useRef, MouseEvent } from 'react';
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import ReactDraggable, { DraggableData } from 'react-draggable';
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import cc from 'classcat';
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import { useStore } from '../../store';
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import { Node, ReactFlowState } from '../../types';
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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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selectionActive: s.selectionActive,
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selectedNodes: Array.from(s.nodeInternals)
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.filter(([_, n]) => n.selected)
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.map(([_, n]) => n),
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snapToGrid: s.snapToGrid,
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snapGrid: s.snapGrid,
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updateNodePosition: s.updateNodePosition,
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});
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export default ({
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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, selectedNodesBbox, selectionActive, selectedNodes, snapToGrid, snapGrid, updateNodePosition } =
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useStore(selector);
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const [tX, tY, tScale] = transform;
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const nodeRef = useRef(null);
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const grid = useMemo(() => (snapToGrid ? snapGrid : [1, 1])! as [number, number], [snapToGrid, snapGrid]);
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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 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: MouseEvent) => {
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onSelectionDragStart?.(event, 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: MouseEvent, data: DraggableData) => {
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if (onSelectionDrag) {
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onSelectionDrag(event, selectedNodes);
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}
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updateNodePosition({
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diff: {
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x: data.deltaX,
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y: data.deltaY,
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},
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dragging: true,
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});
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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: MouseEvent) => {
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updateNodePosition({
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dragging: false,
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});
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onSelectionDragStop?.(event, 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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if (!selectedNodes || selectionActive) {
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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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<ReactDraggable
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scale={tScale}
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grid={grid}
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onStart={(event) => onStart(event as MouseEvent)}
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onDrag={(event, data) => onDrag(event as MouseEvent, data)}
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onStop={(event) => onStop(event as MouseEvent)}
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nodeRef={nodeRef}
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enableUserSelectHack={false}
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>
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<div
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ref={nodeRef}
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className="react-flow__nodesselection-rect"
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onContextMenu={onContextMenu}
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style={innerStyle}
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/>
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</ReactDraggable>
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</div>
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);
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};
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