@mapbox/jsxtreme-markdown/vendor/remark-parse/lib/util/get-indentation.js

Transform Markdown into JSX or React component modules

'use strict';

module.exports = indentation;

var tab = '\t';
var space = ' ';

var spaceSize = 1;
var tabSize = 4;

// Gets indentation information for a line.
function indentation(value) {
  var index = 0;
  var indent = 0;
  var character = value.charAt(index);
  var stops = {};
  var size;
  var lastIndent = 0;

  while (character === tab || character === space) {
    size = character === tab ? tabSize : spaceSize;

    indent += size;

    if (size > 1) {
      indent = Math.floor(indent / size) * size;
    }

    while (lastIndent < indent) {
      stops[++lastIndent] = index;
    }

    character = value.charAt(++index);
  }

  return { indent: indent, stops: stops };
}