fix(memory_leaks): Ensuring events get unbound when grid is destroyed. (#5913)

Adding a set of destroy listeners that unbinds jquery events when the grid is destroyed.

#4203

Author: mportuga

src/features/edit/js/gridEdit.js

@@ -507,7 +507,11 @@
             });
 
 
-            $scope.$on( '$destroy', rowWatchDereg );
+            $scope.$on('$destroy', function destroyEvents() {
+              rowWatchDereg();
+              // unbind all jquery events in order to avoid memory leaks
+              $elm.off();
+            });
 
             function registerBeginEditEvents() {
               $elm.on('dblclick', beginEdit);
@@ -1042,6 +1046,11 @@
 
                   return true;
                 });
+
+                $scope.$on('$destroy', function unbindEvents() {
+                  // unbind all jquery events in order to avoid memory leaks
+                  $elm.off();
+                });
               }
             };
           }
@@ -1185,6 +1194,11 @@
                   }
                   return true;
                 });
+
+                $scope.$on('$destroy', function unbindEvents() {
+                  // unbind jquery events to prevent memory leaks
+                  $elm.off();
+                });
               }
             };
           }
@@ -1277,7 +1291,7 @@
                   }
                 };
 
-                $elm[0].addEventListener('change', handleFileSelect, false);  // TODO: why the false on the end?  Google
+                $elm[0].addEventListener('change', handleFileSelect, false);
 
                 $scope.$on(uiGridEditConstants.events.BEGIN_CELL_EDIT, function () {
                   $elm[0].focus();
@@ -1287,11 +1301,15 @@
                     $scope.$emit(uiGridEditConstants.events.END_CELL_EDIT);
                   });
                 });
+
+                $scope.$on('$destroy', function unbindEvents() {
+                  // unbind jquery events to prevent memory leaks
+                  $elm.off();
+                  $elm[0].removeEventListener('change', handleFileSelect, false);
+                });
               }
             };
           }
         };
       }]);
-
-
 })();

src/features/move-columns/js/column-movable.js

@@ -565,6 +565,8 @@
                     movingElm.css({'width': reducedWidth + 'px'});
                   }
                 };
+
+                $scope.$on('$destroy', offAllEvents);
               }
             }
           };

src/features/selection/js/selection.js

@@ -736,6 +736,10 @@
               window.setTimeout(function () { evt.target.onselectstart = null; }, 0);
             }
           }
+
+          $scope.$on('$destroy', function unbindEvents() {
+            $elm.off();
+          });
         }
       };
     }]);

src/js/core/directives/ui-grid-menu.js

@@ -196,13 +196,11 @@ function ($compile, $timeout, $window, $document, gridUtil, uiGridConstants, i18
         angular.element($window).on('resize', applyHideMenu);
       }
 
-      $scope.$on('$destroy', function () {
-        angular.element(document).off('click touchstart', applyHideMenu);
-      });
-
-
-      $scope.$on('$destroy', function() {
+      $scope.$on('$destroy', function unbindEvents() {
         angular.element($window).off('resize', applyHideMenu);
+        angular.element(document).off('click touchstart', applyHideMenu);
+        $elm.off('keyup', checkKeyUp);
+        $elm.off('keydown', checkKeyDown);
       });
 
       if (uiGridCtrl) {

src/js/core/directives/ui-grid-viewport.js

@@ -133,7 +133,9 @@
             }
           }
 
-
+          $scope.$on('$destroy', function unbindEvents() {
+            $elm.off();
+          });
         },
         controller: ['$scope', function ($scope) {
           this.rowStyle = function (index) {

src/js/core/services/ui-grid-util.js

@@ -1278,6 +1278,11 @@ module.service('gridUtil', ['$log', '$window', '$document', '$http', '$templateC
     for ( var i = mouseWheeltoBind.length; i; ) {
       $elm.on(mouseWheeltoBind[--i], cbs[fn]);
     }
+    $elm.on('$destroy', function unbindEvents() {
+      for ( var i = mouseWheeltoBind.length; i; ) {
+        $elm.off(mouseWheeltoBind[--i], cbs[fn]);
+      }
+    });
   };
   s.off.mousewheel = function (elm, fn) {
     var $elm = angular.element(elm);