markdown-it-kbd/build/index.js

Markdown-it syntax add-on for keystrokes. Renders [[x]] as <kbd>x</kbd>

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = kbdplugin;
const MARKER_OPEN = '[';
const MARKER_CLOSE = ']';
const ESCAPE_CHARACTER = '\\';
const TAG = 'kbd';

/*
 * Add delimiters for double occurrences of MARKER_SYMBOL.
 */
function tokenize(state, silent) {
  if (silent) {
    return false;
  }
  const start = state.pos;
  const max = state.posMax;
  let momChar = state.src.charAt(start);
  let nextChar = state.src.charAt(start + 1);

  // We are looking for two times the open symbol.
  if (momChar !== MARKER_OPEN || nextChar !== MARKER_OPEN) {
    return false;
  }

  // Find the end sequence
  let openTagCount = 1;
  let end = -1;
  let skipNext = false;
  for (let i = start + 1; i < max && end === -1; i++) {
    momChar = nextChar;
    nextChar = state.src.charAt(i + 1);
    if (skipNext) {
      skipNext = false;
      continue;
    }
    if (momChar === MARKER_CLOSE && nextChar === MARKER_CLOSE) {
      openTagCount -= 1;
      if (openTagCount == 0) {
        // Found the end!
        end = i;
      }
      // Skip second marker char, it is already counted.
      skipNext = true;
    } else if (momChar === MARKER_OPEN && nextChar === MARKER_OPEN) {
      openTagCount += 1;
      // Skip second marker char, it is already counted.
      skipNext = true;
    } else if (momChar === '\n') {
      // Found end of line before the end sequence. Thus, ignore our start sequence!
      return false;
    } else if (momChar === ESCAPE_CHARACTER) {
      skipNext = true;
    }
  }

  // Input ended before closing sequence.
  if (end === -1) {
    return false;
  }

  // start tag
  state.push('kbd_open', TAG, 1);
  // parse inner
  state.pos += 2;
  state.posMax = end;
  state.md.inline.tokenize(state);
  state.pos = end + 2;
  state.posMax = max;
  // end tag
  state.push('kbd_close', TAG, -1);
  return true;
}
function kbdplugin(markdownit) {
  markdownit.inline.ruler.before('link', 'kbd', tokenize);
}
module.exports = exports.default;
module.exports.default = exports.default;