Re: sort column using JavaScript in Cognos 8.3

[rams143]

Hi Gilberto,

Following is the javascript code that you posted couple of days back.

<script>

//  SortTable  version 2
//  7th April 2007
//  Stuart Langridge, http://www.kryogenix.org/code/browser/sorttable/
// 
//  Thanks to many, many people for contributions and suggestions.
//  Licenced as X11: http://www.kryogenix.org/code/browser/licence.html
//  This basically means: do what you want with it.
//
// Changed by Gilberto Walker to be used in Cognos 8.3

var stIsIE = /*@cc_on!@*/false;

sorttable = {
  init: function() {
    // quit if this function has already been called
    if (arguments.callee.done) return;
    // flag this function so we don't do the same thing twice
    arguments.callee.done = true;
    // kill the timer
    if (_timer) clearInterval(_timer);
   
    if (!document.createElement || !document.getElementsByTagName) return;
   
    sorttable.DATE_RE = /^(\d\d?)[\/\.-](\d\d?)[\/\.-]((\d\d)?\d\d)$/;
   
    forEach(document.getElementsByTagName('table'), function(table) {
      if (table.className.search(/\bls\b/) != -1) {
        sorttable.makeSortable(table);
      }
    });
   
  },
 
  makeSortable: function(table) {
    if (table.getElementsByTagName('thead').length == 0) {
      // table doesn't have a tHead. Since it should have, create one and
      // put the first table row in it.
      the = document.createElement('thead');
      the.appendChild(table.rows[0]);
      table.insertBefore(the,table.firstChild);
    }
    // Safari doesn't support table.tHead, sigh
    if (table.tHead == null) table.tHead = table.getElementsByTagName('thead')[0];
   
    if (table.tHead.rows.length != 1) return; // can't cope with two header rows
   
    // Sorttable v1 put rows with a class of "sortbottom" at the bottom (as
    // "total" rows, for example). This is B&R, since what you're supposed
    // to do is put them in a tfoot. So, if there are sortbottom rows,
    // for backwards compatibility, move them to tfoot (creating it if needed).
    sortbottomrows = [];
    for (var i=0; i<table.rows.length; i++) {
      if (table.rows.className.search(/\bsortbottom\b/) != -1) {
        sortbottomrows[sortbottomrows.length] = table.rows;
      }
    }
    if (sortbottomrows) {
      if (table.tFoot == null) {
        // table doesn't have a tfoot. Create one.
        tfo = document.createElement('tfoot');
        table.appendChild(tfo);
      }
      for (var i=0; i<sortbottomrows.length; i++) {
        tfo.appendChild(sortbottomrows);
      }
      delete sortbottomrows;
    }
   
    // work through each column and calculate its type
    headrow = table.tHead.rows[0].cells;
    for (var i=0; i<headrow.length; i++) {
      // manually override the type with a sorttable_type attribute
      if (!headrow.className.match(/\bsorttable_nosort\b/)) { // skip this col
        mtch = headrow.className.match(/\bsorttable_([a-z0-9]+)\b/);
        if (mtch) { override = mtch[1]; }
         if (mtch && typeof sorttable["sort_"+override] == 'function') {
           headrow.sorttable_sortfunction = sorttable["sort_"+override];
         } else {
           headrow.sorttable_sortfunction = sorttable.guessType(table,i);
         }
         // make it clickable to sort
         headrow.sorttable_columnindex = i;
         headrow.sorttable_tbody = table.tBodies[0];
         dean_addEvent(headrow,"click", function(e) {

          if (this.className.search(/\bsorttable_sorted\b/) != -1) {
            // if we're already sorted by this column, just
            // reverse the table, which is quicker
            sorttable.reverse(this.sorttable_tbody);
            this.className = this.className.replace('sorttable_sorted',
                                                    'sorttable_sorted_reverse');
            this.removeChild(document.getElementById('sorttable_sortfwdind'));
            sortrevind = document.createElement('span');
            sortrevind.id = "sorttable_sortrevind";
            sortrevind.innerHTML = stIsIE ? '&nbsp<font face="webdings">5</font>' : '&nbsp;&#x25B4;';
            this.appendChild(sortrevind);
            return;
          }
          if (this.className.search(/\bsorttable_sorted_reverse\b/) != -1) {
            // if we're already sorted by this column in reverse, just
            // re-reverse the table, which is quicker
            sorttable.reverse(this.sorttable_tbody);
            this.className = this.className.replace('sorttable_sorted_reverse',
                                                    'sorttable_sorted');
            this.removeChild(document.getElementById('sorttable_sortrevind'));
            sortfwdind = document.createElement('span');
            sortfwdind.id = "sorttable_sortfwdind";
            sortfwdind.innerHTML = stIsIE ? '&nbsp<font face="webdings">6</font>' : '&nbsp;&#x25BE;';
            this.appendChild(sortfwdind);
            return;
          }
         
          // remove sorttable_sorted classes
          theadrow = this.parentNode;
          forEach(theadrow.childNodes, function(cell) {
            if (cell.nodeType == 1) { // an element
              cell.className = cell.className.replace('sorttable_sorted_reverse','');
              cell.className = cell.className.replace('sorttable_sorted','');
            }
          });
          sortfwdind = document.getElementById('sorttable_sortfwdind');
          if (sortfwdind) { sortfwdind.parentNode.removeChild(sortfwdind); }
          sortrevind = document.getElementById('sorttable_sortrevind');
          if (sortrevind) { sortrevind.parentNode.removeChild(sortrevind); }
         
          this.className += ' sorttable_sorted';
          sortfwdind = document.createElement('span');
          sortfwdind.id = "sorttable_sortfwdind";
          sortfwdind.innerHTML = stIsIE ? '&nbsp<font face="webdings">6</font>' : '&nbsp;&#x25BE;';
          this.appendChild(sortfwdind);

           // build an array to sort. This is a Schwartzian transform thing,
           // i.e., we "decorate" each row with the actual sort key,
           // sort based on the sort keys, and then put the rows back in order
           // which is a lot faster because you only do getInnerText once per row
           row_array = [];
           col = this.sorttable_columnindex;
           rows = this.sorttable_tbody.rows;
           for (var j=0; j<rows.length; j++) {
             row_array[row_array.length] = [sorttable.getInnerText(rows[j].cells[col]), rows[j]];
           }
           /* If you want a stable sort, uncomment the following line */
           //sorttable.shaker_sort(row_array, this.sorttable_sortfunction);
           /* and comment out this one */
           row_array.sort(this.sorttable_sortfunction);
          
           tb = this.sorttable_tbody;
           for (var j=0; j<row_array.length; j++) {
             tb.appendChild(row_array[j][1]);
           }
          
           delete row_array;
         });
       }
    }
  },
 
  guessType: function(table, column) {
    // guess the type of a column based on its first non-blank row
    sortfn = sorttable.sort_alpha;
    for (var i=0; i<table.tBodies[0].rows.length; i++) {
      text = sorttable.getInnerText(table.tBodies[0].rows.cells[column]);
      if (text != '') {
        if (text.match(/^-?[£$¤]?[\d,.]+%?$/)) {
          return sorttable.sort_numeric;
        }
        // check for a date: dd/mm/yyyy or dd/mm/yy
        // can have / or . or - as separator
        // can be mm/dd as well
        possdate = text.match(sorttable.DATE_RE)
        if (possdate) {
          // looks like a date
          first = parseInt(possdate[1]);
          second = parseInt(possdate[2]);
          if (first > 12) {
            // definitely dd/mm
            return sorttable.sort_ddmm;
          } else if (second > 12) {
            return sorttable.sort_mmdd;
          } else {
            // looks like a date, but we can't tell which, so assume
            // that it's dd/mm (English imperialism!) and keep looking
            sortfn = sorttable.sort_ddmm;
          }
        }
      }
    }
    return sortfn;
  },
 
  getInnerText: function(node) {
    // gets the text we want to use for sorting for a cell.
    // strips leading and trailing whitespace.
    // this is *not* a generic getInnerText function; it's special to sorttable.
    // for example, you can override the cell text with a customkey attribute.
    // it also gets .value for <input> fields.
   
    hasInputs = (typeof node.getElementsByTagName == 'function') &&
                 node.getElementsByTagName('input').length;
   
    if (node.getAttribute("sorttable_customkey") != null) {
      return node.getAttribute("sorttable_customkey");
    }
    else if (typeof node.textContent != 'undefined' && !hasInputs) {
      return node.textContent.replace(/^\s+|\s+$/g, '');
    }
    else if (typeof node.innerText != 'undefined' && !hasInputs) {
      return node.innerText.replace(/^\s+|\s+$/g, '');
    }
    else if (typeof node.text != 'undefined' && !hasInputs) {
      return node.text.replace(/^\s+|\s+$/g, '');
    }
    else {
      switch (node.nodeType) {
        case 3:
          if (node.nodeName.toLowerCase() == 'input') {
            return node.value.replace(/^\s+|\s+$/g, '');
          }
        case 4:
          return node.nodeValue.replace(/^\s+|\s+$/g, '');
          break;
        case 1:
        case 11:
          var innerText = '';
          for (var i = 0; i < node.childNodes.length; i++) {
            innerText += sorttable.getInnerText(node.childNodes);
          }
          return innerText.replace(/^\s+|\s+$/g, '');
          break;
        default:
          return '';
      }
    }
  },
 
  reverse: function(tbody) {
    // reverse the rows in a tbody
    newrows = [];
    for (var i=0; i<tbody.rows.length; i++) {
      newrows[newrows.length] = tbody.rows;
    }
    for (var i=newrows.length-1; i>=0; i--) {
       tbody.appendChild(newrows);
    }
    delete newrows;
  },
 
  /* sort functions
     each sort function takes two parameters, a and b
     you are comparing a[0] and b[0] */
  sort_numeric: function(a,b) {
    aa = parseFloat(a[0].replace(/[^0-9.-]/g,''));
    if (isNaN(aa)) aa = 0;
    bb = parseFloat(b[0].replace(/[^0-9.-]/g,''));
    if (isNaN(bb)) bb = 0;
    return aa-bb;
  },
  sort_alpha: function(a,b) {
    if (a[0]==b[0]) return 0;
    if (a[0]<b[0]) return -1;
    return 1;
  },
  sort_ddmm: function(a,b) {
    mtch = a[0].match(sorttable.DATE_RE);
    y = mtch[3]; m = mtch[2]; d = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt1 = y+m+d;
    mtch = b[0].match(sorttable.DATE_RE);
    y = mtch[3]; m = mtch[2]; d = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt2 = y+m+d;
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
  },
  sort_mmdd: function(a,b) {
    mtch = a[0].match(sorttable.DATE_RE);
    y = mtch[3]; d = mtch[2]; m = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt1 = y+m+d;
    mtch = b[0].match(sorttable.DATE_RE);
    y = mtch[3]; d = mtch[2]; m = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt2 = y+m+d;
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
  },
 
  shaker_sort: function(list, comp_func) {
    // A stable sort function to allow multi-level sorting of data
    // see: http://en.wikipedia.org/wiki/Cocktail_sort
    // thanks to Joseph Nahmias
    var b = 0;
    var t = list.length - 1;
    var swap = true;

    while(swap) {
        swap = false;
        for(var i = b; i < t; ++i) {
            if ( comp_func(list, list[i+1]) > 0 ) {
                var q = list; list = list[i+1]; list[i+1] = q;
                swap = true;
            }
        } // for
        t--;

        if (!swap) break;

        for(var i = t; i > b; --i) {
            if ( comp_func(list, list[i-1]) < 0 ) {
                var q = list; list = list[i-1]; list[i-1] = q;
                swap = true;
            }
        } // for
        b++;

    } // while(swap)
  } 
}

/* ******************************************************************
   Supporting functions: bundled here to avoid depending on a library
   ****************************************************************** */

// Dean Edwards/Matthias Miller/John Resig

/* for Mozilla/Opera9 */
if (document.addEventListener) {
    document.addEventListener("DOMContentLoaded", sorttable.init, false);
}

/* for Internet Explorer */
/*@cc_on @*/
/*@if (@_win32)
    document.write("<script id=__ie_onload defer src=javascript:void(0)><\/script>");
    var script = document.getElementById("__ie_onload");
    script.onreadystatechange = function() {
        if (this.readyState == "complete") {
            sorttable.init(); // call the onload handler
        }
    };
/*@end @*/

/* for Safari */
if (/WebKit/i.test(navigator.userAgent)) { // sniff
    var _timer = setInterval(function() {
        if (/loaded|complete/.test(document.readyState)) {
            sorttable.init(); // call the onload handler
        }
    }, 10);
}

/* for other browsers */
window.onload = sorttable.init;

// written by Dean Edwards, 2005
// with input from Tino Zijdel, Matthias Miller, Diego Perini

// http://dean.edwards.name/weblog/2005/10/add-event/

function dean_addEvent(element, type, handler) {
   if (element.addEventListener) {
      element.addEventListener(type, handler, false);
   } else {
      // assign each event handler a unique ID
      if (!handler.$$guid) handler.$$guid = dean_addEvent.guid++;
      // create a hash table of event types for the element
      if (!element.events) element.events = {};
      // create a hash table of event handlers for each element/event pair
      var handlers = element.events[type];
      if (!handlers) {
         handlers = element.events[type] = {};
         // store the existing event handler (if there is one)
         if (element["on" + type]) {
            handlers[0] = element["on" + type];
         }
      }
      // store the event handler in the hash table
      handlers[handler.$$guid] = handler;
      // assign a global event handler to do all the work
      element["on" + type] = handleEvent;
   }
};
// a counter used to create unique IDs
dean_addEvent.guid = 1;

function removeEvent(element, type, handler) {
   if (element.removeEventListener) {
      element.removeEventListener(type, handler, false);
   } else {
      // delete the event handler from the hash table
      if (element.events && element.events[type]) {
         delete element.events[type][handler.$$guid];
      }
   }
};

function handleEvent(event) {
   var returnValue = true;
   // grab the event object (IE uses a global event object)
   event = event || fixEvent(((this.ownerDocument || this.document || this).parentWindow || window).event);
   // get a reference to the hash table of event handlers
   var handlers = this.events[event.type];
   // execute each event handler
   for (var i in handlers) {
      this.$$handleEvent = handlers;
      if (this.$$handleEvent(event) === false) {
         returnValue = false;
      }
   }
   return returnValue;
};

function fixEvent(event) {
   // add W3C standard event methods
   event.preventDefault = fixEvent.preventDefault;
   event.stopPropagation = fixEvent.stopPropagation;
   return event;
};
fixEvent.preventDefault = function() {
   this.returnValue = false;
};
fixEvent.stopPropagation = function() {
  this.cancelBubble = true;
}

// Dean's forEach: http://dean.edwards.name/base/forEach.js
/*
   forEach, version 1.0
   Copyright 2006, Dean Edwards
   License: http://www.opensource.org/licenses/mit-license.php
*/

// array-like enumeration
if (!Array.forEach) { // mozilla already supports this
   Array.forEach = function(array, block, context) {
      for (var i = 0; i < array.length; i++) {
         block.call(context, array, i, array);
      }
   };
}

// generic enumeration
Function.prototype.forEach = function(object, block, context) {
   for (var key in object) {
      if (typeof this.prototype[key] == "undefined") {
         block.call(context, object[key], key, object);
      }
   }
};

// character enumeration
String.forEach = function(string, block, context) {
   Array.forEach(string.split(""), function(chr, index) {
      block.call(context, chr, index, string);
   });
};

// globally resolve forEach enumeration
var forEach = function(object, block, context) {
   if (object) {
      var resolve = Object; // default
      if (object instanceof Function) {
         // functions have a "length" property
         resolve = Function;
      } else if (object.forEach instanceof Function) {
         // the object implements a custom forEach method so use that
         object.forEach(block, context);
         return;
      } else if (typeof object == "string") {
         // the object is a string
         resolve = String;
      } else if (typeof object.length == "number") {
         // the object is array-like
         resolve = Array;
      }
      resolve.forEach(object, block, context);
   }
};

</script>




This works really good. But I think the sort symbol that appears on the column header when you click the header looks like the arrows are upside-down. Try sorting in Windows Explorer to see what I mean.

If you can help me change the display of the arrows that will solve my issue.

I just mentioned "Gilberto" because he posted the code. I welcome everybody to chime in and resolve the issue.

Thanks in advance........

Rams.