118 lines
3.4 KiB
TypeScript
118 lines
3.4 KiB
TypeScript
import { useCallback, CSSProperties } from 'react';
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import {
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Node,
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ReactFlowState,
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useStore,
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getRectOfNodes,
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Transform,
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Rect,
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Position,
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internalsSymbol,
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} from '@reactflow/core';
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import cc from 'classcat';
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import shallow from 'zustand/shallow';
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import NodeToolbarPortal from './NodeToolbarPortal';
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import { NodeToolbarProps } from './types';
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const nodeEqualityFn = (a: Node | undefined, b: Node | undefined) =>
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a?.positionAbsolute?.x === b?.positionAbsolute?.x &&
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a?.positionAbsolute?.y === b?.positionAbsolute?.y &&
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a?.width === b?.width &&
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a?.height === b?.height &&
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a?.selected === b?.selected &&
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a?.[internalsSymbol]?.z === b?.[internalsSymbol]?.z;
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const nodesEqualityFn = (a: Node[], b: Node[]) => {
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return a.length === b.length && a.every((node, i) => nodeEqualityFn(node, b[i]));
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};
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const storeSelector = (state: ReactFlowState) => ({
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transform: state.transform,
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nodeOrigin: state.nodeOrigin,
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selectedNodesCount: Array.from(state.nodeInternals.values()).filter((node) => node.selected).length,
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});
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function getTransform(nodeRect: Rect, transform: Transform, position: Position, offset: number): string {
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// position === Position.Top
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let xPos = (nodeRect.x + nodeRect.width / 2) * transform[2] + transform[0];
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let yPos = nodeRect.y * transform[2] + transform[1] - offset;
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let xShift = -50;
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let yShift = -100;
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switch (position) {
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case Position.Right:
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xPos = (nodeRect.x + nodeRect.width) * transform[2] + transform[0] + offset;
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yPos = (nodeRect.y + nodeRect.height / 2) * transform[2] + transform[1];
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xShift = 0;
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yShift = -50;
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break;
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case Position.Bottom:
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yPos = (nodeRect.y + nodeRect.height) * transform[2] + transform[1] + offset;
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yShift = 0;
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break;
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case Position.Left:
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xPos = nodeRect.x * transform[2] + transform[0] - offset;
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yPos = (nodeRect.y + nodeRect.height / 2) * transform[2] + transform[1];
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xShift = -100;
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yShift = -50;
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break;
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}
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return `translate(${xPos}px, ${yPos}px) translate(${xShift}%, ${yShift}%)`;
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}
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function NodeToolbar({
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nodeId,
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children,
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className,
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style,
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isVisible,
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position = Position.Top,
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offset = 10,
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...rest
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}: NodeToolbarProps) {
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const nodesSelector = useCallback(
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(state: ReactFlowState): Node[] => {
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const nodeIds: string[] = typeof nodeId === 'string' ? [nodeId] : nodeId;
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return nodeIds.reduce<Node[]>((acc, id) => {
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const node = state.nodeInternals.get(id);
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if (node) {
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acc.push(node);
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}
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return acc;
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}, [] as Node[]);
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},
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[nodeId]
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);
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const nodes = useStore(nodesSelector, nodesEqualityFn);
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const { transform, nodeOrigin, selectedNodesCount } = useStore(storeSelector, shallow);
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const isActive =
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typeof isVisible === 'boolean' ? isVisible : nodes.length === 1 && nodes[0].selected && selectedNodesCount === 1;
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if (!isActive || !nodes.length) {
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return null;
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}
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const nodeRect: Rect = getRectOfNodes(nodes, nodeOrigin);
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const zIndex: number = Math.max(...nodes.map((node) => (node[internalsSymbol]?.z || 1) + 1));
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const wrapperStyle: CSSProperties = {
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position: 'absolute',
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transform: getTransform(nodeRect, transform, position, offset),
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zIndex,
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...style,
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};
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return (
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<NodeToolbarPortal>
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<div style={wrapperStyle} className={cc(['react-flow__node-toolbar', className])} {...rest}>
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{children}
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</div>
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</NodeToolbarPortal>
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);
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}
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export default NodeToolbar;
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