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      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 com.android.layoutlib.bridge.impl.DelegateManager;
     20 import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
     21 
     22 /**
     23  * Delegate implementing the native methods of {@link RenderNode}
     24  * <p/>
     25  * Through the layoutlib_create tool, some native methods of RenderNode have been replaced by calls
     26  * to methods of the same name in this delegate class.
     27  *
     28  * @see DelegateManager
     29  */
     30 public class RenderNode_Delegate {
     31 
     32 
     33     // ---- delegate manager ----
     34     private static final DelegateManager<RenderNode_Delegate> sManager =
     35             new DelegateManager<RenderNode_Delegate>(RenderNode_Delegate.class);
     36 
     37 
     38     private float mLift;
     39     @SuppressWarnings("UnusedDeclaration")
     40     private String mName;
     41 
     42     @LayoutlibDelegate
     43     /*package*/ static long nCreate(String name) {
     44         RenderNode_Delegate renderNodeDelegate = new RenderNode_Delegate();
     45         renderNodeDelegate.mName = name;
     46         return sManager.addNewDelegate(renderNodeDelegate);
     47     }
     48 
     49     @LayoutlibDelegate
     50     /*package*/ static void nDestroyRenderNode(long renderNode) {
     51         sManager.removeJavaReferenceFor(renderNode);
     52     }
     53 
     54     @LayoutlibDelegate
     55     /*package*/ static boolean nSetElevation(long renderNode, float lift) {
     56         RenderNode_Delegate delegate = sManager.getDelegate(renderNode);
     57         if (delegate != null && delegate.mLift != lift) {
     58             delegate.mLift = lift;
     59             return true;
     60         }
     61         return false;
     62     }
     63 
     64     @LayoutlibDelegate
     65     /*package*/ static float nGetElevation(long renderNode) {
     66         RenderNode_Delegate delegate = sManager.getDelegate(renderNode);
     67         if (delegate != null) {
     68             return delegate.mLift;
     69         }
     70         return 0f;
     71     }
     72 }
     73