1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.view;
18 
19 import android.content.Context;
20 import com.android.ide.common.rendering.api.LayoutLog;
21 import com.android.ide.common.rendering.api.ViewInfo;
22 import com.android.internal.view.menu.BridgeMenuItemImpl;
23 import com.android.internal.view.menu.MenuView;
24 import com.android.layoutlib.bridge.Bridge;
25 import com.android.layoutlib.bridge.android.BridgeContext;
26 import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
27 
28 import android.util.AttributeSet;
29 
30 /**
31  * Delegate used to provide new implementation of a select few methods of {@link MenuInflater}
32  * <p/>
33  * Through the layoutlib_create tool, the original  methods of MenuInflater have been
34  * replaced by calls to methods of the same name in this delegate class.
35  * <p/>
36  * The main purpose of the class is to get the view key from the menu xml parser and add it to
37  * the menu item. The view key is used by the IDE to match the individual view elements to the
38  * corresponding xml tag in the menu/layout file.
39  * <p/>
40  * For Menus, the views may be reused and the {@link MenuItem} is a better object to hold the
41  * view key than the {@link MenuView.ItemView}. At the time of computation of the rest of {@link
42  * ViewInfo}, we check the corresponding view key in the menu item for the view and add it
43  */
44 public class MenuInflater_Delegate {
45 
46     @LayoutlibDelegate
registerMenu(MenuInflater thisInflater, MenuItem menuItem, AttributeSet attrs)47     /*package*/ static void registerMenu(MenuInflater thisInflater, MenuItem menuItem,
48             AttributeSet attrs) {
49         if (menuItem instanceof BridgeMenuItemImpl) {
50             Context context = thisInflater.getContext();
51             context = BridgeContext.getBaseContext(context);
52             if (context instanceof BridgeContext) {
53                 Object viewKey = BridgeInflater.getViewKeyFromParser(
54                         attrs, ((BridgeContext) context), null, false);
55                 ((BridgeMenuItemImpl) menuItem).setViewCookie(viewKey);
56                 return;
57             }
58         }
59         // This means that Bridge did not take over the instantiation of some object properly.
60         // This is most likely a bug in the LayoutLib code.
61         Bridge.getLog().warning(LayoutLog.TAG_BROKEN,
62                 "Action Bar Menu rendering may be incorrect.", null);
63 
64     }
65 
66     @LayoutlibDelegate
registerMenu(MenuInflater thisInflater, SubMenu subMenu, AttributeSet parser)67     /*package*/ static void registerMenu(MenuInflater thisInflater, SubMenu subMenu,
68             AttributeSet parser) {
69         registerMenu(thisInflater, subMenu.getItem(), parser);
70     }
71 
72 }
73