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import React from 'react';
import { BlockMath, InlineMath } from 'react-katex';
import 'katex/dist/katex.min.css';
import styled from 'styled-components'
const StyledInlineLatex = styled.div`
display: block;
margin-bottom: 1em;
`
const Latex = (props) => {
// split by \begin{...} and \end{...} flags
const els = props.content.split(/(\\begin\{.*\}[\s\S]*?\\end\{.*\})/gm).map(line => {
// line doesnt start with \begin{...}, safe to split on \\
if (!line.match(/^(\\begin\{.*\})/)) {
return line.split("\\\\")
} else {
return line
}
}).flat()
// if <=1 lines, just render block
if (els.length <= 1) {
return (
<BlockMath>
{props.content}
</BlockMath>
);
} else {
// new inline block for every line
const blocks = els.map(line =>
<StyledInlineLatex>
<InlineMath>
{line}
</InlineMath>
</StyledInlineLatex>
)
return blocks;
}
}
const StyledLatex = styled(Latex)`
/* fix weird symbol height in render mode */
.large-op {
transform: translateY(-0.55em);
}
.small-op {
transform: translateY(-0.1em);
}
`
export default StyledLatex
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