59 lines
1.5 KiB
TypeScript
59 lines
1.5 KiB
TypeScript
import React, { memo, useRef, useState, useEffect, FC } from 'react';
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import { EdgeTextProps, Rect } from '../../types';
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const EdgeText: FC<EdgeTextProps> = ({
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x,
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y,
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label,
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labelStyle = {},
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labelShowBg = true,
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labelBgStyle = {},
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labelBgPadding = [2, 4],
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labelBgBorderRadius = 2,
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children,
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...rest
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}) => {
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const edgeRef = useRef<SVGTextElement>(null);
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const [edgeTextBbox, setEdgeTextBbox] = useState<Rect>({ x: 0, y: 0, width: 0, height: 0 });
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useEffect(() => {
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if (edgeRef.current) {
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const textBbox = edgeRef.current.getBBox();
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setEdgeTextBbox({
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x: textBbox.x,
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y: textBbox.y,
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width: textBbox.width,
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height: textBbox.height,
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});
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}
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}, [label]);
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if (typeof label === 'undefined' || !label) {
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return null;
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}
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return (
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<g transform={`translate(${x - edgeTextBbox.width / 2} ${y - edgeTextBbox.height / 2})`} {...rest}>
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{labelShowBg && (
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<rect
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width={edgeTextBbox.width + 2 * labelBgPadding[0]}
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x={-labelBgPadding[0]}
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y={-labelBgPadding[1]}
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height={edgeTextBbox.height + 2 * labelBgPadding[1]}
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className="react-flow__edge-textbg"
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style={labelBgStyle}
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rx={labelBgBorderRadius}
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ry={labelBgBorderRadius}
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/>
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)}
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<text className="react-flow__edge-text" y={edgeTextBbox.height / 2} dy="0.3em" ref={edgeRef} style={labelStyle}>
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{label}
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</text>
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{children}
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</g>
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);
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};
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export default memo(EdgeText);
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