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      1 /*
      2  * Copyright (C) 2008 Esmertec AG.
      3  * Copyright (C) 2008 The Android Open Source Project
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 package com.android.mms.layout;
     19 
     20 import com.android.mms.LogTag;
     21 
     22 import android.content.Context;
     23 import android.content.res.Configuration;
     24 import android.util.Log;
     25 
     26 /**
     27  * MMS presentation layout management.
     28  */
     29 public class LayoutManager {
     30     private static final String TAG = LogTag.TAG;
     31     private static final boolean DEBUG = false;
     32     private static final boolean LOCAL_LOGV = false;
     33 
     34     private final Context mContext;
     35     private LayoutParameters mLayoutParams;
     36 
     37     private static LayoutManager sInstance;
     38 
     39     private LayoutManager(Context context) {
     40         mContext = context;
     41         initLayoutParameters(context.getResources().getConfiguration());
     42     }
     43 
     44     private void initLayoutParameters(Configuration configuration) {
     45         mLayoutParams = getLayoutParameters(
     46                 configuration.orientation == Configuration.ORIENTATION_PORTRAIT
     47                 ? LayoutParameters.HVGA_PORTRAIT
     48                 : LayoutParameters.HVGA_LANDSCAPE);
     49 
     50         if (LOCAL_LOGV) {
     51             Log.v(TAG, "LayoutParameters: " + mLayoutParams.getTypeDescription()
     52                     + ": " + mLayoutParams.getWidth() + "x" + mLayoutParams.getHeight());
     53         }
     54     }
     55 
     56     private LayoutParameters getLayoutParameters(int displayType) {
     57         switch (displayType) {
     58             case LayoutParameters.HVGA_LANDSCAPE:
     59                 return new HVGALayoutParameters(mContext, LayoutParameters.HVGA_LANDSCAPE);
     60             case LayoutParameters.HVGA_PORTRAIT:
     61                 return new HVGALayoutParameters(mContext, LayoutParameters.HVGA_PORTRAIT);
     62         }
     63 
     64         throw new IllegalArgumentException(
     65                 "Unsupported display type: " + displayType);
     66     }
     67 
     68     public static void init(Context context) {
     69         if (LOCAL_LOGV) {
     70             Log.v(TAG, "DefaultLayoutManager.init()");
     71         }
     72 
     73         if (sInstance != null) {
     74             Log.w(TAG, "Already initialized.");
     75         }
     76         sInstance = new LayoutManager(context);
     77     }
     78 
     79     public static LayoutManager getInstance() {
     80         if (sInstance == null) {
     81             throw new IllegalStateException("Uninitialized.");
     82         }
     83         return sInstance;
     84     }
     85 
     86     public void onConfigurationChanged(Configuration newConfig) {
     87         if (LOCAL_LOGV) {
     88             Log.v(TAG, "-> LayoutManager.onConfigurationChanged().");
     89         }
     90         initLayoutParameters(newConfig);
     91     }
     92 
     93     public int getLayoutType() {
     94         return mLayoutParams.getType();
     95     }
     96 
     97     public int getLayoutWidth() {
     98         return mLayoutParams.getWidth();
     99     }
    100 
    101     public int getLayoutHeight() {
    102         return mLayoutParams.getHeight();
    103     }
    104 
    105     public LayoutParameters getLayoutParameters() {
    106         return mLayoutParams;
    107     }
    108 }
    109