update

dist/fix/fix.compact.js

@@ -197,12 +197,8 @@
                     BI.each(childComponents, function (i, childComponent) {
                         var nextProps = BI.get([newEls], childComponent.path);
                         if (nextProps) {
-                            var shouldUpdate;
-                            if (shouldUpdate = (childComponent.component.shouldUpdate && childComponent.component.shouldUpdate(nextProps))) {
-                                childComponent.component._update(shouldUpdate === true ? nextProps : shouldUpdate);
-                            } else {
-                                childComponent.component._update(nextProps);
-                            }
+                            var shouldUpdate = childComponent.component.shouldUpdate && childComponent.component.shouldUpdate(nextProps);
+                            childComponent.component._update(nextProps, shouldUpdate);
                             childComponent.props = BI.extend(childComponent.props, nextProps);
                         }
                     });

src/core/widget.js

@@ -74,8 +74,7 @@
 
         shouldUpdate: null,
 
-        update: function () {
-        },
+        update: null,
 
         beforeUpdate: null,
 
@@ -248,16 +247,21 @@
 
         _mountChildren: null,
 
-        _update: function (nextProps) {
+        _update: function (nextProps, shouldUpdate) {
             var o = this.options;
             callLifeHook(this, "beforeUpdate");
+            if (shouldUpdate) {
+                var res = this.update && this.update(nextProps, shouldUpdate);
+            } else if (BI.isNull(shouldUpdate)) {
+                // 默认使用shallowCompare的方式进行更新
                 var nextChange = {};
                 BI.each(nextProps, function (key, value) {
                     if (o[key] !== value) {
                         nextChange[key] = value;
                     }
                 });
-            var res = BI.isNotEmptyObject(nextChange) && this.update(nextChange);
+                var res = this.update && BI.isNotEmptyObject(nextChange) && this.update(nextChange);
+            }
             callLifeHook(this, "updated");
             return res;
         },

src/core/wrapper/layout.js

@@ -361,11 +361,14 @@ BI.Layout = BI.inherit(BI.Widget, {
 
     patchItem: function (oldVnode, vnode, index) {
         var shouldUpdate = this.shouldUpdateItem(index, vnode);
-        if (shouldUpdate) {
         var child = this._children[this._getChildName(index)];
-            return child._update(shouldUpdate === true ? this._getOptions(vnode) : shouldUpdate);
+        if (shouldUpdate) {
+            return child._update(this._getOptions(vnode), shouldUpdate);
         }
         if (shouldUpdate === null && !this._compare(oldVnode, vnode)) {
+            if (child.update) {
+                return child.update(this._getOptions(vnode));
+            }
             return this.updateItemAt(index, vnode);
         }
     },