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@@ -1,80 +1,83 @@
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import katex from 'katex';
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-const inlineRule = /^(\${1,2})(?!\$)((?:\\.|[^\\\n])*?(?:\\.|[^\\\n\$]))\1(?=[\s?!\.,:?!。,:]|$)/;
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+const inlineRule =
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+ /^(\${1,2})(?!\$)((?:\\.|[^\\\n])*?(?:\\.|[^\\\n\$]))\1(?=[\s?!\.,:?!。,:]|$)/;
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const inlineRuleNonStandard = /^(\${1,2})(?!\$)((?:\\.|[^\\\n])*?(?:\\.|[^\\\n\$]))\1/; // Non-standard, even if there are no spaces before and after $ or $$, try to parse
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const blockRule = /^(\${1,2})\n((?:\\[^]|[^\\])+?)\n\1(?:\n|$)/;
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-export default function(options = {}) {
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- return {
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- extensions: [
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- inlineKatex(options, createRenderer(options, false)),
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- blockKatex(options, createRenderer(options, true)),
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- ],
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- };
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+export default function (options = {}) {
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+ return {
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+ extensions: [
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+ inlineKatex(options, createRenderer(options, false)),
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+ blockKatex(options, createRenderer(options, true))
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+ ]
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+ };
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}
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function createRenderer(options, newlineAfter) {
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- return (token) => katex.renderToString(token.text, { ...options, displayMode: token.displayMode }) + (newlineAfter ? '\n' : '');
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+ return (token) =>
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+ katex.renderToString(token.text, { ...options, displayMode: token.displayMode }) +
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+ (newlineAfter ? '\n' : '');
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}
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function inlineKatex(options, renderer) {
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- const nonStandard = options && options.nonStandard;
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- const ruleReg = nonStandard ? inlineRuleNonStandard : inlineRule;
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- return {
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- name: 'inlineKatex',
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- level: 'inline',
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- start(src) {
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- let index;
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- let indexSrc = src;
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+ const nonStandard = options && options.nonStandard;
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+ const ruleReg = nonStandard ? inlineRuleNonStandard : inlineRule;
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+ return {
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+ name: 'inlineKatex',
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+ level: 'inline',
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+ start(src) {
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+ let index;
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+ let indexSrc = src;
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- while (indexSrc) {
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- index = indexSrc.indexOf('$');
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- if (index === -1) {
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- return;
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- }
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- const f = nonStandard ? index > -1 : index === 0 || indexSrc.charAt(index - 1) === ' ';
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- if (f) {
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- const possibleKatex = indexSrc.substring(index);
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+ while (indexSrc) {
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+ index = indexSrc.indexOf('$');
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+ if (index === -1) {
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+ return;
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+ }
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+ const f = nonStandard ? index > -1 : index === 0 || indexSrc.charAt(index - 1) === ' ';
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+ if (f) {
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+ const possibleKatex = indexSrc.substring(index);
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- if (possibleKatex.match(ruleReg)) {
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- return index;
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- }
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- }
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+ if (possibleKatex.match(ruleReg)) {
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+ return index;
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+ }
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+ }
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- indexSrc = indexSrc.substring(index + 1).replace(/^\$+/, '');
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- }
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- },
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- tokenizer(src, tokens) {
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- const match = src.match(ruleReg);
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- if (match) {
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- return {
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- type: 'inlineKatex',
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- raw: match[0],
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- text: match[2].trim(),
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- displayMode: match[1].length === 2,
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- };
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- }
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- },
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- renderer,
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- };
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+ indexSrc = indexSrc.substring(index + 1).replace(/^\$+/, '');
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+ }
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+ },
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+ tokenizer(src, tokens) {
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+ const match = src.match(ruleReg);
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+ if (match) {
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+ return {
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+ type: 'inlineKatex',
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+ raw: match[0],
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+ text: match[2].trim(),
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+ displayMode: match[1].length === 2
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+ };
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+ }
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+ },
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+ renderer
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+ };
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}
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function blockKatex(options, renderer) {
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- return {
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- name: 'blockKatex',
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- level: 'block',
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- tokenizer(src, tokens) {
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- const match = src.match(blockRule);
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- if (match) {
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- return {
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- type: 'blockKatex',
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- raw: match[0],
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- text: match[2].trim(),
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- displayMode: match[1].length === 2,
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- };
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- }
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- },
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- renderer,
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- };
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-}
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+ return {
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+ name: 'blockKatex',
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+ level: 'block',
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+ tokenizer(src, tokens) {
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+ const match = src.match(blockRule);
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+ if (match) {
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+ return {
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+ type: 'blockKatex',
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+ raw: match[0],
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+ text: match[2].trim(),
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+ displayMode: match[1].length === 2
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+ };
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+ }
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+ },
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+ renderer
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+ };
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+}
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