LayoutManager.java revision 72735c62aba8fd2a9420a0f9f83d22543e3c164f 
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
18package com.android.mms.layout;
19
20import android.content.Context;
21import android.content.res.Configuration;
22import android.util.Config;
23import android.util.Log;
24import android.view.Display;
25import android.view.WindowManager;
26
27/**
28 * MMS presentation layout management.
29 */
30public class LayoutManager {
31    private static final String TAG = "LayoutManager";
32    private static final boolean DEBUG = false;
33    private static final boolean LOCAL_LOGV = DEBUG ? Config.LOGD : Config.LOGV;
34
35    private final Context mContext;
36    private LayoutParameters mLayoutParams;
37
38    private static LayoutManager sInstance;
39
40    private LayoutManager(Context context) {
41        mContext = context;
42        initLayoutParameters(context.getResources().getConfiguration());
43    }
44
45    private void initLayoutParameters(Configuration configuration) {
46        mLayoutParams = getLayoutParameters(
47                configuration.orientation == Configuration.ORIENTATION_PORTRAIT
48                ? LayoutParameters.HVGA_PORTRAIT
49                : LayoutParameters.HVGA_LANDSCAPE);
50
51        if (LOCAL_LOGV) {
52            Log.v(TAG, "LayoutParameters: " + mLayoutParams.getTypeDescription()
53                    + ": " + mLayoutParams.getWidth() + "x" + mLayoutParams.getHeight());
54        }
55    }
56
57    private static LayoutParameters getLayoutParameters(int displayType) {
58        switch (displayType) {
59            case LayoutParameters.HVGA_LANDSCAPE:
60                return new HVGALayoutParameters(LayoutParameters.HVGA_LANDSCAPE);
61            case LayoutParameters.HVGA_PORTRAIT:
62                return new HVGALayoutParameters(LayoutParameters.HVGA_PORTRAIT);
63        }
64
65        throw new IllegalArgumentException(
66                "Unsupported display type: " + displayType);
67    }
68
69    public static void init(Context context) {
70        if (LOCAL_LOGV) {
71            Log.v(TAG, "DefaultLayoutManager.init()");
72        }
73
74        if (sInstance != null) {
75            Log.w(TAG, "Already initialized.");
76        }
77        sInstance = new LayoutManager(context);
78    }
79
80    public static LayoutManager getInstance() {
81        if (sInstance == null) {
82            throw new IllegalStateException("Uninitialized.");
83        }
84        return sInstance;
85    }
86
87    public void onConfigurationChanged(Configuration newConfig) {
88        if (LOCAL_LOGV) {
89            Log.v(TAG, "-> LayoutManager.onConfigurationChanged().");
90        }
91        initLayoutParameters(newConfig);
92    }
93
94    public int getLayoutType() {
95        return mLayoutParams.getType();
96    }
97
98    public int getLayoutWidth() {
99        return mLayoutParams.getWidth();
100    }
101
102    public int getLayoutHeight() {
103        return mLayoutParams.getHeight();
104    }
105
106    public LayoutParameters getLayoutParameters() {
107        return mLayoutParams;
108    }
109}
110