61 lines
2.0 KiB
JavaScript
61 lines
2.0 KiB
JavaScript
|
/*! markdown-it-sub 2.0.0 https://github.com/markdown-it/markdown-it-sub @license MIT */
|
||
|
|
(function(global, factory) {
|
||
|
|
typeof exports === "object" && typeof module !== "undefined" ? module.exports = factory() : typeof define === "function" && define.amd ? define(factory) : (global = typeof globalThis !== "undefined" ? globalThis : global || self,
|
||
|
|
global.markdownitSub = factory());
|
||
|
|
})(this, (function() {
|
||
|
|
"use strict";
|
||
|
|
// Process ~subscript~
|
||
|
|
// same as UNESCAPE_MD_RE plus a space
|
||
|
|
const UNESCAPE_RE = /\\([ \\!"#$%&'()*+,./:;<=>?@[\]^_`{|}~-])/g;
|
||
|
|
function subscript(state, silent) {
|
||
|
|
const max = state.posMax;
|
||
|
|
const start = state.pos;
|
||
|
|
if (state.src.charCodeAt(start) !== 126 /* ~ */) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
if (silent) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
// don't run any pairs in validation mode
|
||
|
|
if (start + 2 >= max) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
state.pos = start + 1;
|
||
|
|
let found = false;
|
||
|
|
while (state.pos < max) {
|
||
|
|
if (state.src.charCodeAt(state.pos) === 126 /* ~ */) {
|
||
|
|
found = true;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
state.md.inline.skipToken(state);
|
||
|
|
}
|
||
|
|
if (!found || start + 1 === state.pos) {
|
||
|
|
state.pos = start;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
const content = state.src.slice(start + 1, state.pos);
|
||
|
|
// don't allow unescaped spaces/newlines inside
|
||
|
|
if (content.match(/(^|[^\\])(\\\\)*\s/)) {
|
||
|
|
state.pos = start;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
// found!
|
||
|
|
state.posMax = state.pos;
|
||
|
|
state.pos = start + 1;
|
||
|
|
// Earlier we checked !silent, but this implementation does not need it
|
||
|
|
const token_so = state.push("sub_open", "sub", 1);
|
||
|
|
token_so.markup = "~";
|
||
|
|
const token_t = state.push("text", "", 0);
|
||
|
|
token_t.content = content.replace(UNESCAPE_RE, "$1");
|
||
|
|
const token_sc = state.push("sub_close", "sub", -1);
|
||
|
|
token_sc.markup = "~";
|
||
|
|
state.pos = state.posMax + 1;
|
||
|
|
state.posMax = max;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
function sub_plugin(md) {
|
||
|
|
md.inline.ruler.after("emphasis", "sub", subscript);
|
||
|
|
}
|
||
|
|
return sub_plugin;
|
||
|
|
}));
|