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|
<template>
<div class="cell text-cell">
<prompt />
<div class="markdown" v-html="markdown"></div>
</div>
</template>
<script>
/* global katex */
import marked from 'marked';
import Prompt from './prompt.vue';
const renderer = new marked.Renderer();
/*
Regex to match KaTex blocks.
Supports the following:
\begin{equation}<math>\end{equation}
$$<math>$$
inline $<math>$
The matched text then goes through the KaTex renderer & then outputs the HTML
*/
const katexRegexString = `(
^\\\\begin{[a-zA-Z]+}\\s
|
^\\$\\$
|
\\s\\$(?!\\$)
)
(.+?)
(
\\s\\\\end{[a-zA-Z]+}$
|
\\$\\$$
|
\\$
)
`.replace(/\s/g, '').trim();
renderer.paragraph = (t) => {
let text = t;
let inline = false;
if (typeof katex !== 'undefined') {
const katexString = text.replace(/\\/g, '\\');
const matches = new RegExp(katexRegexString, 'gi').exec(katexString);
if (matches && matches.length > 0) {
if (matches[1].trim() === '$' && matches[3].trim() === '$') {
inline = true;
text = `${katexString.replace(matches[0], '')} ${katex.renderToString(matches[2])}`;
} else {
text = katex.renderToString(matches[2]);
}
}
}
return `<p class="${inline ? 'inline-katex' : ''}">${text}</p>`;
};
marked.setOptions({
sanitize: true,
renderer,
});
export default {
components: {
prompt: Prompt,
},
props: {
cell: {
type: Object,
required: true,
},
},
computed: {
markdown() {
return marked(this.cell.source.join(''));
},
},
};
</script>
<style>
.markdown .katex {
display: block;
text-align: center;
}
.markdown .inline-katex .katex {
display: inline;
text-align: initial;
}
</style>
|
