add sorting to wiki tables

javascripts/theme.js

@@ -1,4 +1,85 @@
+function sort_table() {
+    var table = $(this).parents('tbody')[0];
+
+    /* get table column index */
+    var child = $(this)[0];
+    var col = 0;
+    while( (child = child.previousSibling) != null ) {
+      if (child.tagName == 'TD') col++;
+    }
+
+    /* save sorting preferences */
+    var asc = parseInt($(table).data('sort-asc') || 1);
+    var ccol = parseInt($(table).data('sort-col') || 0);
+    if (col == ccol) { asc = -asc; } else { asc = 1; }
+    $(table).data('sort-col', col);
+    $(table).data('sort-asc', asc);
+
+    /* fill the array with values from the table */
+    var rows = table.rows, rlen = rows.length, arr = new Array(), i, j, cells, clen;
+    for (i=0; i<rlen; i++){
+      cells = rows[i].cells;
+      clen = cells.length;
+      arr[i] = new Array();
+      for (j = 0; j < clen; j++){
+        var v = cells[j].innerHTML;
+        /* try to guess column type */
+        var date = v.match(/(\d\d?)\/(\d\d?)\/(\d\d\d\d)/i);
+        if (date) {
+            v = new Date();
+            v.setYear(date[3]);
+            v.setMonth(date[2]);
+            v.setDate(date[1]);
+        } else {
+          var date = v.match(/(\d\d?)\/(\d\d\d\d)/i);
+          if (date) {
+            v = new Date();
+            v.setYear(date[2]);
+            v.setMonth(date[1]);
+            v.setDate(1);
+          } else {
+            v = v.match(/\d+/i);
+            if (v) {
+              v = parseInt(v);
+            } else {
+              v = cells[j].innerHTML;
+            }
+          }
+        }
+        if (cells[j].innerText == '') {
+          v = null;
+        }
+        /* store both original html and typed value */
+        arr[i][j] = Array(cells[j].innerHTML, v);
+      }
+    }
+
+    var first_row = arr.shift(); /* skip first row (header) */
+
+    /* sort rows, empty cells last */
+    arr.sort(function(a, b){
+        a = a[col][1]; b = b[col][1];
+        if (a === null && b === null) return 0;
+        if (a === null) return 1;
+        if (b === null) return -1;
+        return (a == b) ? 0 : ((a > b) ? asc : -1*asc);
+    });
+
+    arr.unshift(first_row); /* pub back first row */
+
+    /* recreate content */
+    for (i = 0; i < rlen; i++){
+        arr[i] = "<td>"+arr[i].map(function(x) {return x[0];}).join("</td><td>")+"</td>";
+    }
+    table.innerHTML = "<tr>"+arr.join("</tr><tr>")+"</tr>";
+
+    /* set back callback */
+    $(table).find('tr:first-child td').on('click', sort_table).css('cursor', 'row-resize');
+}
+
 $(function() {
+  $('.wiki table tr:first-child td').on('click', sort_table).css('cursor', 'row-resize');
+
   if ($('.administration').length == 0) {
     /* fake access control */
     return;