[JS] Find hyperlinks in a block of text

Question

Is there any way I can easily, given a block of text, find which hyperlinks have their SourceTexts inside that block of text, or overlapping it?
The only way I could think of was to loop through all the hyperlinks in the document and then check to see if any character in their SourceText was === to any character in the block of text we're searching.  That seems a little wasteful.

Answer 1

This works, but it's slow:
// Returns an array of Hyperlinks whose SourceTexts are
// contained within (or overlapping with) textObj
function checkHyperlinks (textObj, doc) {
  var foundLinks = new Array();
  var overlap;
  for (var linkIndex=doc.hyperlinks.length-1; linkIndex >= 0; linkIndex--) {
    overlap = false;
    var link = doc.hyperlinks[linkIndex];
    var linkText = link.source.sourceText;
    for (c=0; c < linkText.length; c++) {
      for (d=0; d < textObj.length; d++) {
        if (linkText.characters[c] == textObj.characters[d]) {
          overlap = true;
          break;
      if (overlap) break;
    if (overlap) {
      foundLinks.push (link);
  return foundLinks;