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Allow passing of options to Katex renderer #19

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merged 1 commit into from
Apr 29, 2020
Merged

Allow passing of options to Katex renderer #19

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4 changes: 2 additions & 2 deletions readme.md
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Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,7 @@ Use it with JavaScript.
tm = require('markdown-it-texmath'),
md = require('markdown-it')().use(tm, { engine: require('katex'),
delimiters:'dollars',
macros:{"\\RR": "\\mathbb{R}"}
katexOptions: { macros: {"\\RR": "\\mathbb{R}"} }
});

md.render('Euler\'s identity \(e^{i\pi}+1=0\) is a beautiful formula in $\\RR 2$.')
Expand All @@ -81,7 +81,7 @@ md.render('Euler\'s identity \(e^{i\pi}+1=0\) is a beautiful formula in $\\RR 2$
const tm = texmath.use(katex);
const md = markdownit().use(tm, { engine: katex,
delimiters:'dollars',
macros:{"\\RR": "\\mathbb{R}"}
katexOptions: { macros: {"\\RR": "\\mathbb{R}"} }
});
document.getElementById('out').innerHTML =
md.render('Euler\'s identity $e^{i\pi}+1=0$ is a beautiful formula in //RR 2.');
Expand Down
14 changes: 8 additions & 6 deletions texmath.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,8 +5,9 @@
'use strict';

function texmath(md, options) {
let delimiters = options && options.delimiters || 'dollars',
macros = options && options.macros;
let delimiters = options && options.delimiters || 'dollars';
let katexOptions = options && options.katexOptions || { throwOnError: false };
katexOptions.macros = options && options.macros || katexOptions.macros; // ensure backwards compatibility

if (!texmath.katex) { // else ... depricated `use` method was used ...
if (options && typeof options.engine === 'object') {
Expand All @@ -21,13 +22,13 @@ function texmath(md, options) {
if (delimiters in texmath.rules) {
for (let rule of texmath.rules[delimiters].inline) {
md.inline.ruler.before('escape', rule.name, texmath.inline(rule)); // ! important
md.renderer.rules[rule.name] = (tokens, idx) => rule.tmpl.replace(/\$1/,texmath.render(tokens[idx].content,false,macros));
md.renderer.rules[rule.name] = (tokens, idx) => rule.tmpl.replace(/\$1/,texmath.render(tokens[idx].content,false,katexOptions));
}

for (let rule of texmath.rules[delimiters].block) {
md.block.ruler.before('fence', rule.name, texmath.block(rule));
md.renderer.rules[rule.name] = (tokens, idx) => rule.tmpl.replace(/\$2/,tokens[idx].info) // equation number .. ?
.replace(/\$1/,texmath.render(tokens[idx].content,true,macros));
.replace(/\$1/,texmath.render(tokens[idx].content,true,katexOptions));
}
}
}
Expand Down Expand Up @@ -85,10 +86,11 @@ texmath.block = (rule) =>
return !!res;
}

texmath.render = function(tex,displayMode,macros) {
texmath.render = function(tex,displayMode,options) {
options.displayMode = displayMode;
let res;
try {
res = texmath.katex.renderToString(tex,{throwOnError:false,displayMode,macros});
res = texmath.katex.renderToString(tex, options);
}
catch(err) {
res = tex+": "+err.message.replace("<","&lt;");
Expand Down