1/*
2 * Copyright (C) 2008 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
17package com.android.launcher2;
18
19import android.app.Application;
20import android.app.SearchManager;
21import android.content.ContentResolver;
22import android.content.Context;
23import android.content.Intent;
24import android.content.IntentFilter;
25import android.content.res.Configuration;
26import android.database.ContentObserver;
27import android.os.Handler;
28
29import com.android.launcher.R;
30
31import java.lang.ref.WeakReference;
32
33public class LauncherApplication extends Application {
34    public LauncherModel mModel;
35    public IconCache mIconCache;
36    private static boolean sIsScreenLarge;
37    private static float sScreenDensity;
38    private static int sLongPressTimeout = 300;
39    private static final String sSharedPreferencesKey = "com.android.launcher2.prefs";
40    WeakReference<LauncherProvider> mLauncherProvider;
41
42    @Override
43    public void onCreate() {
44        super.onCreate();
45
46        // set sIsScreenXLarge and sScreenDensity *before* creating icon cache
47        sIsScreenLarge = getResources().getBoolean(R.bool.is_large_screen);
48        sScreenDensity = getResources().getDisplayMetrics().density;
49
50        mIconCache = new IconCache(this);
51        mModel = new LauncherModel(this, mIconCache);
52
53        // Register intent receivers
54        IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);
55        filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
56        filter.addAction(Intent.ACTION_PACKAGE_CHANGED);
57        filter.addDataScheme("package");
58        registerReceiver(mModel, filter);
59        filter = new IntentFilter();
60        filter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
61        filter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE);
62        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
63        filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
64        registerReceiver(mModel, filter);
65        filter = new IntentFilter();
66        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
67        registerReceiver(mModel, filter);
68        filter = new IntentFilter();
69        filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
70        registerReceiver(mModel, filter);
71
72        // Register for changes to the favorites
73        ContentResolver resolver = getContentResolver();
74        resolver.registerContentObserver(LauncherSettings.Favorites.CONTENT_URI, true,
75                mFavoritesObserver);
76    }
77
78    /**
79     * There's no guarantee that this function is ever called.
80     */
81    @Override
82    public void onTerminate() {
83        super.onTerminate();
84
85        unregisterReceiver(mModel);
86
87        ContentResolver resolver = getContentResolver();
88        resolver.unregisterContentObserver(mFavoritesObserver);
89    }
90
91    /**
92     * Receives notifications whenever the user favorites have changed.
93     */
94    private final ContentObserver mFavoritesObserver = new ContentObserver(new Handler()) {
95        @Override
96        public void onChange(boolean selfChange) {
97            // If the database has ever changed, then we really need to force a reload of the
98            // workspace on the next load
99            mModel.resetLoadedState(false, true);
100            mModel.startLoaderFromBackground();
101        }
102    };
103
104    LauncherModel setLauncher(Launcher launcher) {
105        mModel.initialize(launcher);
106        return mModel;
107    }
108
109    IconCache getIconCache() {
110        return mIconCache;
111    }
112
113    LauncherModel getModel() {
114        return mModel;
115    }
116
117    void setLauncherProvider(LauncherProvider provider) {
118        mLauncherProvider = new WeakReference<LauncherProvider>(provider);
119    }
120
121    LauncherProvider getLauncherProvider() {
122        return mLauncherProvider.get();
123    }
124
125    public static String getSharedPreferencesKey() {
126        return sSharedPreferencesKey;
127    }
128
129    public static boolean isScreenLarge() {
130        return sIsScreenLarge;
131    }
132
133    public static boolean isScreenLandscape(Context context) {
134        return context.getResources().getConfiguration().orientation ==
135            Configuration.ORIENTATION_LANDSCAPE;
136    }
137
138    public static float getScreenDensity() {
139        return sScreenDensity;
140    }
141
142    public static int getLongPressTimeout() {
143        return sLongPressTimeout;
144    }
145}
146