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      1 /*
      2  * Copyright (C) 2011 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.android.BridgeWindowManager;
     20 import com.android.layoutlib.bridge.impl.RenderAction;
     21 import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
     22 
     23 import android.os.RemoteException;
     24 
     25 /**
     26  * Delegate used to provide new implementation of a select few methods of {@link Display}
     27  *
     28  * Through the layoutlib_create tool, the original  methods of Display have been replaced
     29  * by calls to methods of the same name in this delegate class.
     30  *
     31  */
     32 public class Display_Delegate {
     33 
     34     // ---- Overridden methods ----
     35 
     36     @LayoutlibDelegate
     37     public static IWindowManager getWindowManager() {
     38         return RenderAction.getCurrentContext().getIWindowManager();
     39     }
     40 
     41     // ---- Native methods ----
     42 
     43     @LayoutlibDelegate
     44     /*package*/ static int getDisplayCount() {
     45         return 1;
     46     }
     47 
     48     @LayoutlibDelegate
     49     /** @hide special for when we are faking the screen size. */
     50     /*package*/ static int getRawWidthNative(Display theDisplay) {
     51         // same as real since we're not faking compatibility mode.
     52         return RenderAction.getCurrentContext().getIWindowManager().getMetrics().widthPixels;
     53     }
     54 
     55     @LayoutlibDelegate
     56     /** @hide special for when we are faking the screen size. */
     57     /*package*/ static int getRawHeightNative(Display theDisplay) {
     58         // same as real since we're not faking compatibility mode.
     59         return RenderAction.getCurrentContext().getIWindowManager().getMetrics().heightPixels;
     60     }
     61 
     62     @LayoutlibDelegate
     63     /*package*/ static int getOrientation(Display theDisplay) {
     64         try {
     65             // always dynamically query for the current window manager
     66             return getWindowManager().getRotation();
     67         } catch (RemoteException e) {
     68             // this will never been thrown since this is not a true RPC.
     69         }
     70 
     71         return Surface.ROTATION_0;
     72     }
     73 
     74     @LayoutlibDelegate
     75     /*package*/ static void nativeClassInit() {
     76         // not needed for now.
     77     }
     78 
     79     @LayoutlibDelegate
     80     /*package*/ static void init(Display theDisplay, int display) {
     81         // always dynamically query for the current window manager
     82         BridgeWindowManager wm = RenderAction.getCurrentContext().getIWindowManager();
     83         theDisplay.mDensity = wm.getMetrics().density;
     84         theDisplay.mDpiX = wm.getMetrics().xdpi;
     85         theDisplay.mDpiY = wm.getMetrics().ydpi;
     86     }
     87 }
     88