Function getNodeWeight

lib/reader.js:548–581

* every node in candidates get a specified weight. * @param node the node element. * @param cans candidates array. * @param options options.

(node, cans, options)

 * @param options options.
 */
function getNodeWeight(node, cans, options){
  // Add the score to the parent. The grandparent gets half
  var parent = node.parent();

  // if parent not exists, break.
  if (parent && parent.length == 0) {
    return;
  }

  var text = node.text().trim();

  // if this paragraph is less than [minTextLength] characters, don't even count it.
  if (text.length < options.minTextLength) {
    return;
  }

  var score = 1;
  // add points for any commas within this paragraph.
  var commas = text.match(regexps.commas);
  if (commas && commas.length) {
    score += commas.length;
  }
  // for every 100 characters in this paragraph, add another point. up to 3 points.
  score += Math.min(Math.floor(text.length / 100), 3);
  // add the score to the parent and the grandparent gets half.
  scoreNode(parent, score, cans, options.scoreRule);

  var grandParent = parent.parent();
  if (grandParent && grandParent.length > 0) {
    var dampedScore = score * (isFinite(options.damping) ? options.damping : (1 / 2));
    dampedScore = isFinite(dampedScore) ? dampedScore : 0;
    scoreNode(grandParent, dampedScore, cans, options.scoreRule);
  }
}

/**
 * Add score to the node.