Factlink/factlink-core

(function() {
  /*
   * A very simple script to filter a table according to search criteria
   *
   * http://leparlement.org/filterTable
   * See also http://www.vonloesch.de/node/23
   */
  function filterTable(term, table) {
    dehighlight(table);
    var terms = term.value.toLowerCase().split(" ");

    for (var r = 1; r < table.rows.length; r++) {
      var display = '';
      for (var i = 0; i < terms.length; i++) {
        if (table.rows[r].innerHTML.replace(/<[^>]+>/g, "").toLowerCase()
          .indexOf(terms[i]) < 0) {
          display = 'none';
        } else {
          if (terms[i].length) highlight(terms[i], table.rows[r]);
        }
        table.rows[r].style.display = display;
      }
    }
  }


  /*
   * Transform back each
   * <span>preText <span class="highlighted">term</span> postText</span>
   * into its original
   * preText term postText
   */
  function dehighlight(container) {
    for (var i = 0; i < container.childNodes.length; i++) {
      var node = container.childNodes[i];

      if (node.attributes && node.attributes['class'] &&
        node.attributes['class'].value == 'highlighted') {
        node.parentNode.parentNode.replaceChild(
            document.createTextNode(
              node.parentNode.innerHTML.replace(/<[^>]+>/g, "")),
            node.parentNode);
        // Stop here and process next parent
        return;
      } else if (node.nodeType != 3) {
        // Keep going onto other elements
        dehighlight(node);
      }
    }
  }

  /*
   * Create a
   * <span>preText <span class="highlighted">term</span> postText</span>
   * around each search term
   */
  function highlight(term, container) {
    for (var i = 0; i < container.childNodes.length; i++) {
      var node = container.childNodes[i];

      if (node.nodeType == 3) {
        // Text node
        var data = node.data;
        var data_low = data.toLowerCase();
        if (data_low.indexOf(term) >= 0) {
          //term found!
          var new_node = document.createElement('span');

          node.parentNode.replaceChild(new_node, node);

          var result;
          while ((result = data_low.indexOf(term)) != -1) {
            new_node.appendChild(document.createTextNode(
                  data.substr(0, result)));
            new_node.appendChild(create_node(
                  document.createTextNode(data.substr(
                      result, term.length))));
            data = data.substr(result + term.length);
            data_low = data_low.substr(result + term.length);
          }
          new_node.appendChild(document.createTextNode(data));
        }
      } else {
        // Keep going onto other elements
        highlight(term, node);
      }
    }
  }

  function create_node(child) {
    var node = document.createElement('span');
    node.setAttribute('class', 'highlighted');
    node.attributes['class'].value = 'highlighted';
    node.appendChild(child);
    return node;
  }



  /*
   * Here is the code used to set a filter on all filterable elements, usually I
   * use the behaviour.js library which does that just fine
   */

  var table = $('table.filterable')[0];

  $('form.filter>input').on('keyup', function( e ) {
    filterTable(this, table);
  });
}());