/*
20220304 fho4abcd Test on undefined value in highlightSearchTerms
20220304 fho4abcd Correct wrong replacements,more replacements
20230202 fho4abcd Return without processing if search string= ""
*/
function doHighlight(bodyText, searchTerm, highlightStartTag, highlightEndTag) 
{
  // the highlightStartTag and highlightEndTag parameters are optional
  if ((!highlightStartTag) || (!highlightEndTag)) {
    highlightStartTag = "<span style='color:blue; background-color:yellow;'>";
    highlightEndTag = "</span>";
  }
  
  // find all occurences of the search term in the given text,
  // and add some "highlight" tags to them (we're not using a
  // regular expression search, because we want to filter out
  // matches that occur within HTML tags and script blocks, so
  // we have to do a little extra validation)
  var newText = "";
  var i = -1;
  var lcSearchTerm = searchTerm.toLowerCase();
  lcSearchTerm  = lcSearchTerm.replace(/[èéęêë]/ig, 'e');
  lcSearchTerm  = lcSearchTerm.replace(/[àâäá]/ig, "a");
  lcSearchTerm  = lcSearchTerm.replace(/[îïíì]/ig, "i");
  lcSearchTerm  = lcSearchTerm.replace(/[ôöóò]/ig, "o");
  lcSearchTerm  = lcSearchTerm.replace(/[ùûůűüú]/ig, "u");
  lcSearchTerm  = lcSearchTerm.replace(/[,]/ig, "");

  var lcBodyText = bodyText.toLowerCase();
  lcBodyText = lcBodyText.replace(/[èéęêë]/ig, 'e');
  lcBodyText = lcBodyText.replace(/[àâäá]/ig, "a");
  lcBodyText = lcBodyText.replace(/[îïíì]/ig, "i");
  lcBodyText = lcBodyText.replace(/[ôöóò]/ig, "o");
  lcBodyText = lcBodyText.replace(/[ùûůűüú]/ig, "u");
    
  while (bodyText.length > 0) {
    i = lcBodyText.indexOf(lcSearchTerm, i+1);
    if (i < 0) {
      newText += bodyText;
      bodyText = "";
    } else {
      // skip anything inside an HTML tag
      if (bodyText.lastIndexOf(">", i) >= bodyText.lastIndexOf("<", i)) {
        // skip anything inside a <script> block
        if (lcBodyText.lastIndexOf("/script>", i) >= lcBodyText.lastIndexOf("<script", i)) {
          newText += bodyText.substring(0, i) + highlightStartTag + bodyText.substr(i, searchTerm.length) + highlightEndTag;
          bodyText = bodyText.substr(i + searchTerm.length);
          lcBodyText = bodyText.toLowerCase();
          lcBodyText = lcBodyText.replace(/[èéęêë]/ig, 'e');
        lcBodyText = lcBodyText.replace(/[àâäá]/ig, "a");
        lcBodyText = lcBodyText.replace(/[îïíì]/ig, "i");
        lcBodyText = lcBodyText.replace(/[ôöóò]/ig, "o");
        lcBodyText = lcBodyText.replace(/[ùûůűüú]/ig, "u");
          i = -1;
        }
      }
    }
  }
  
  return newText;

}


/*
 * This is sort of a wrapper function to the doHighlight function.
 * It takes the searchText that you pass, optionally splits it into
 * separate words, and transforms the text on the current web page.
 * Only the "searchText" parameter is required; all other parameters
 * are optional and can be omitted.
 */
function highlightSearchTerms(searchText, treatAsPhrase, warnOnFailure, highlightStartTag, highlightEndTag)
{
  // if the treatAsPhrase parameter is true, then we should search for 
  // the entire phrase that was entered; otherwise, we will split the
  // search string so that each word is searched for and highlighted
  // individually
  if (searchText=="") return true;
  if (treatAsPhrase) {
    searchArray = [searchText];
  } else {
    searchArray = searchText.split(" ");
  }
  
  if (!document.body || typeof(document.body.innerHTML) == "undefined") {
    if (warnOnFailure) {
      alert("Sorry, for some reason the text of this page is unavailable. Searching will not work.");
    }
    return false;
  }
  
  var bodyText = document.body.innerHTML;
  for (var i = 0; i < searchArray.length; i++) {
    term=searchArray[i];
    ix=term.lastIndexOf('$')
    if (ix>0){
        term=term.substring(0,ix)
        bodyText = doHighlight(bodyText, term, highlightStartTag, highlightEndTag);
    }else{
        if (term.length>3)
            bodyText = doHighlight(bodyText, term, highlightStartTag, highlightEndTag);
    }
  }

  document.body.innerHTML = bodyText;

  var textareDataentry = document.getElementById("nueva_b");
  if (textareDataentry!=null) {
    textareDataentry.innerHTML = textareDataentry.innerText.replace(/(<([^>]+)>)/gi, '');
  }
  
  return true;
}