input-format/modules/closeBraces.js

Formatting user's text input on-the-fly

import { count_occurences } from './helpers.js';
export default function closeBraces(retained_template, template) {
  var placeholder = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 'x';
  var empty_placeholder = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : ' ';
  var cut_before = retained_template.length;
  var opening_braces = count_occurences('(', retained_template);
  var closing_braces = count_occurences(')', retained_template);
  var dangling_braces = opening_braces - closing_braces;

  while (dangling_braces > 0 && cut_before < template.length) {
    retained_template += template[cut_before].replace(placeholder, empty_placeholder);

    if (template[cut_before] === ')') {
      dangling_braces--;
    }

    cut_before++;
  }

  return retained_template;
}
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