Bug 1523719: Allowing blocks to order right

When moving them downwards in a column from a non-first position to a
non-last position with a jump greater than one place

behatnotneeded

Change-Id: Ie9bacc4a1a4ef77efd4e481c9ab3713885821dc1
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>
(cherry picked from commit a8750346)

htdocs/lib/view.php

@@ -2254,12 +2254,6 @@ class View {
             }
             else {
                 $this->shuffle_cell($values['row'], $bi->get('column'), $values['order'], $bi->get('order'));
-                if ($bi->get('order') < $values['order']) {
-                    // When moving a block down within a column, the final order is one less
-                    // than the 'desired' order because of the empty space created when the
-                    // block gets taken out of its original spot.
-                    $values['order'] -= 1;
-                }
             }
         }
         // moving to another column
@@ -2694,15 +2688,23 @@ class View {
             // move it out of range (set to 0)
             set_field_select('block_instance', 'order', 0, '"order" = ? AND "view" = ? AND "row" = ? AND "column" = ?', array($remove, $this->get('id'), $row, $column));
             if (!empty($insert)) {
-                // shuffle everything up
+                // shuffle everything
+                if ($insert > $remove) {
+                    $this->shuffle_helper('order', 'down', '>=', $remove, '"order" <= ? AND "row" = ? AND "column" = ?', array($insert, $row, $column));
+                }
+                else {
                     $this->shuffle_helper('order', 'up', '>=', $insert, '"row" = ? AND "column" = ?', array($row, $column));
+                    // shuffle everything down
+                    $this->shuffle_helper('order', 'down', '>', $remove, '"row" = ? AND "column" = ?', array($row, $column));
+                }
                 // now move it back
                 set_field_select('block_instance', 'order', $insert, '"order" = ? AND "view" = ? AND "row" = ? AND "column" = ?', array(0, $this->get('id'), $row, $column));
             }
-
+            else {
                 // shuffle everything down
                 $this->shuffle_helper('order', 'down', '>', $remove, '"row" = ? AND "column" = ?', array($row, $column));
             }
+        }
         else if (!empty($insert)) {
             // shuffle everything up
             $this->shuffle_helper('order', 'up', '>=', $insert, '"row" = ? AND "column" = ?', array($row, $column));