/*! markdown-it-ins 4.0.0 https://github.com/markdown-it/markdown-it-ins @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.markdownitIns = factory());
})(this, (function() {
  "use strict";
  function ins_plugin(md) {
    // Insert each marker as a separate text token, and add it to delimiter list
    function tokenize(state, silent) {
      const start = state.pos;
      const marker = state.src.charCodeAt(start);
      if (silent) {
        return false;
      }
      if (marker !== 43 /* + */) {
        return false;
      }
      const scanned = state.scanDelims(state.pos, true);
      let len = scanned.length;
      const ch = String.fromCharCode(marker);
      if (len < 2) {
        return false;
      }
      if (len % 2) {
        const token = state.push("text", "", 0);
        token.content = ch;
        len--;
      }
      for (let i = 0; i < len; i += 2) {
        const token = state.push("text", "", 0);
        token.content = ch + ch;
        if (!scanned.can_open && !scanned.can_close) {
          continue;
        }
        state.delimiters.push({
          marker: marker,
          length: 0,
          // disable "rule of 3" length checks meant for emphasis
          jump: i / 2,
          // 1 delimiter = 2 characters
          token: state.tokens.length - 1,
          end: -1,
          open: scanned.can_open,
          close: scanned.can_close
        });
      }
      state.pos += scanned.length;
      return true;
    }
    // Walk through delimiter list and replace text tokens with tags
    
        function postProcess(state, delimiters) {
      let token;
      const loneMarkers = [];
      const max = delimiters.length;
      for (let i = 0; i < max; i++) {
        const startDelim = delimiters[i];
        if (startDelim.marker !== 43 /* + */) {
          continue;
        }
        if (startDelim.end === -1) {
          continue;
        }
        const endDelim = delimiters[startDelim.end];
        token = state.tokens[startDelim.token];
        token.type = "ins_open";
        token.tag = "ins";
        token.nesting = 1;
        token.markup = "++";
        token.content = "";
        token = state.tokens[endDelim.token];
        token.type = "ins_close";
        token.tag = "ins";
        token.nesting = -1;
        token.markup = "++";
        token.content = "";
        if (state.tokens[endDelim.token - 1].type === "text" && state.tokens[endDelim.token - 1].content === "+") {
          loneMarkers.push(endDelim.token - 1);
        }
      }
      // If a marker sequence has an odd number of characters, it's splitted
      // like this: `~~~~~` -> `~` + `~~` + `~~`, leaving one marker at the
      // start of the sequence.
      
      // So, we have to move all those markers after subsequent s_close tags.
      
            while (loneMarkers.length) {
        const i = loneMarkers.pop();
        let j = i + 1;
        while (j < state.tokens.length && state.tokens[j].type === "ins_close") {
          j++;
        }
        j--;
        if (i !== j) {
          token = state.tokens[j];
          state.tokens[j] = state.tokens[i];
          state.tokens[i] = token;
        }
      }
    }
    md.inline.ruler.before("emphasis", "ins", tokenize);
    md.inline.ruler2.before("emphasis", "ins", (function(state) {
      const tokens_meta = state.tokens_meta;
      const max = (state.tokens_meta || []).length;
      postProcess(state, state.delimiters);
      for (let curr = 0; curr < max; curr++) {
        if (tokens_meta[curr] && tokens_meta[curr].delimiters) {
          postProcess(state, tokens_meta[curr].delimiters);
        }
      }
    }));
  }
  return ins_plugin;
}));