markdown-it/lib/rules_block/code.js

// Code block (4 spaces padded)

'use strict';


module.exports = function code(state, startLine, endLine/*, silent*/) {
  var nextLine, last, token, emptyLines = 0;

  if (state.sCount[startLine] - state.blkIndent < 4) { return false; }

  last = nextLine = startLine + 1;

  while (nextLine < endLine) {
    if (state.isEmpty(nextLine)) {
      emptyLines++;

      // workaround for lists: 2 blank lines should terminate indented
      // code block, but not fenced code block
      if (emptyLines >= 2 && state.parentType === 'list') {
        break;
      }

      nextLine++;
      continue;
    }

    emptyLines = 0;

    if (state.sCount[nextLine] - state.blkIndent >= 4) {
      nextLine++;
      last = nextLine;
      continue;
    }
    break;
  }

  state.line = last;

  token         = state.push('code_block', 'code', 0);
  token.content = state.getLines(startLine, last, 4 + state.blkIndent, true);
  token.map     = [ startLine, state.line ];

  return true;
};