LauncherAppState.java revision c9acdd51c40c1b397adae6ba62c4acd01914b473 
1/*
2 * Copyright (C) 2013 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.launcher3;
18
19import android.annotation.TargetApi;
20import android.app.SearchManager;
21import android.content.ComponentName;
22import android.content.ContentResolver;
23import android.content.Context;
24import android.content.Intent;
25import android.content.IntentFilter;
26import android.content.res.Configuration;
27import android.content.res.Resources;
28import android.database.ContentObserver;
29import android.graphics.Point;
30import android.os.Build;
31import android.os.Handler;
32import android.util.DisplayMetrics;
33import android.util.Log;
34import android.view.Display;
35import android.view.View.AccessibilityDelegate;
36import android.view.WindowManager;
37
38import com.android.launcher3.compat.LauncherAppsCompat;
39import com.android.launcher3.compat.PackageInstallerCompat;
40import com.android.launcher3.compat.PackageInstallerCompat.PackageInstallInfo;
41
42import java.lang.ref.WeakReference;
43import java.util.ArrayList;
44
45public class LauncherAppState implements DeviceProfile.DeviceProfileCallbacks {
46
47    private final AppFilter mAppFilter;
48    private final BuildInfo mBuildInfo;
49    private final LauncherModel mModel;
50    private final IconCache mIconCache;
51
52    private final boolean mIsScreenLarge;
53    private final float mScreenDensity;
54    private final int mLongPressTimeout = 300;
55
56    private WidgetPreviewLoader.CacheDb mWidgetPreviewCacheDb;
57    private boolean mWallpaperChangedSinceLastCheck;
58
59    private static WeakReference<LauncherProvider> sLauncherProvider;
60    private static Context sContext;
61
62    private static LauncherAppState INSTANCE;
63
64    private DynamicGrid mDynamicGrid;
65    private AccessibilityDelegate mAccessibilityDelegate;
66
67    public static LauncherAppState getInstance() {
68        if (INSTANCE == null) {
69            INSTANCE = new LauncherAppState();
70        }
71        return INSTANCE;
72    }
73
74    public static LauncherAppState getInstanceNoCreate() {
75        return INSTANCE;
76    }
77
78    public Context getContext() {
79        return sContext;
80    }
81
82    public static void setApplicationContext(Context context) {
83        if (sContext != null) {
84            Log.w(Launcher.TAG, "setApplicationContext called twice! old=" + sContext + " new=" + context);
85        }
86        sContext = context.getApplicationContext();
87    }
88
89    private LauncherAppState() {
90        if (sContext == null) {
91            throw new IllegalStateException("LauncherAppState inited before app context set");
92        }
93
94        Log.v(Launcher.TAG, "LauncherAppState inited");
95
96        if (sContext.getResources().getBoolean(R.bool.debug_memory_enabled)) {
97            MemoryTracker.startTrackingMe(sContext, "L");
98        }
99
100        // set sIsScreenXLarge and mScreenDensity *before* creating icon cache
101        mIsScreenLarge = isScreenLarge(sContext.getResources());
102        mScreenDensity = sContext.getResources().getDisplayMetrics().density;
103
104        recreateWidgetPreviewDb();
105        mIconCache = new IconCache(sContext);
106
107        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
108        mBuildInfo = BuildInfo.loadByName(sContext.getString(R.string.build_info_class));
109        mModel = new LauncherModel(this, mIconCache, mAppFilter);
110        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
111        launcherApps.addOnAppsChangedCallback(mModel);
112
113        // Register intent receivers
114        IntentFilter filter = new IntentFilter();
115        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
116        filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
117        sContext.registerReceiver(mModel, filter);
118        filter = new IntentFilter();
119        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
120        sContext.registerReceiver(mModel, filter);
121        filter = new IntentFilter();
122        filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
123        sContext.registerReceiver(mModel, filter);
124
125        // Register for changes to the favorites
126        ContentResolver resolver = sContext.getContentResolver();
127        resolver.registerContentObserver(LauncherSettings.Favorites.CONTENT_URI, true,
128                mFavoritesObserver);
129    }
130
131    public void recreateWidgetPreviewDb() {
132        if (mWidgetPreviewCacheDb != null) {
133            mWidgetPreviewCacheDb.close();
134        }
135        mWidgetPreviewCacheDb = new WidgetPreviewLoader.CacheDb(sContext);
136    }
137
138    /**
139     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
140     */
141    public void onTerminate() {
142        sContext.unregisterReceiver(mModel);
143        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
144        launcherApps.removeOnAppsChangedCallback(mModel);
145        PackageInstallerCompat.getInstance(sContext).onStop();
146
147        ContentResolver resolver = sContext.getContentResolver();
148        resolver.unregisterContentObserver(mFavoritesObserver);
149    }
150
151    /**
152     * Receives notifications whenever the user favorites have changed.
153     */
154    private final ContentObserver mFavoritesObserver = new ContentObserver(new Handler()) {
155        @Override
156        public void onChange(boolean selfChange) {
157            // If the database has ever changed, then we really need to force a reload of the
158            // workspace on the next load
159            mModel.resetLoadedState(false, true);
160            mModel.startLoaderFromBackground();
161        }
162    };
163
164    LauncherModel setLauncher(Launcher launcher) {
165        mModel.initialize(launcher);
166        mAccessibilityDelegate = ((launcher != null) && Utilities.isLmpOrAbove()) ?
167            new LauncherAccessibilityDelegate(launcher) : null;
168        return mModel;
169    }
170
171    AccessibilityDelegate getAccessibilityDelegate() {
172        return mAccessibilityDelegate;
173    }
174
175    public IconCache getIconCache() {
176        return mIconCache;
177    }
178
179    LauncherModel getModel() {
180        return mModel;
181    }
182
183    boolean shouldShowAppOrWidgetProvider(ComponentName componentName) {
184        return mAppFilter == null || mAppFilter.shouldShowApp(componentName);
185    }
186
187    WidgetPreviewLoader.CacheDb getWidgetPreviewCacheDb() {
188        return mWidgetPreviewCacheDb;
189    }
190
191    static void setLauncherProvider(LauncherProvider provider) {
192        sLauncherProvider = new WeakReference<LauncherProvider>(provider);
193    }
194
195    static LauncherProvider getLauncherProvider() {
196        return sLauncherProvider.get();
197    }
198
199    public static String getSharedPreferencesKey() {
200        return LauncherFiles.SHARED_PREFERENCES_KEY;
201    }
202
203    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
204    DeviceProfile initDynamicGrid(Context context) {
205        mDynamicGrid = createDynamicGrid(context, mDynamicGrid);
206        mDynamicGrid.getDeviceProfile().addCallback(this);
207        return mDynamicGrid.getDeviceProfile();
208    }
209
210    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
211    static DynamicGrid createDynamicGrid(Context context, DynamicGrid dynamicGrid) {
212        // Determine the dynamic grid properties
213        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
214        Display display = wm.getDefaultDisplay();
215
216        Point realSize = new Point();
217        display.getRealSize(realSize);
218        DisplayMetrics dm = new DisplayMetrics();
219        display.getMetrics(dm);
220
221        if (dynamicGrid == null) {
222            Point smallestSize = new Point();
223            Point largestSize = new Point();
224            display.getCurrentSizeRange(smallestSize, largestSize);
225
226            dynamicGrid = new DynamicGrid(context,
227                    context.getResources(),
228                    Math.min(smallestSize.x, smallestSize.y),
229                    Math.min(largestSize.x, largestSize.y),
230                    realSize.x, realSize.y,
231                    dm.widthPixels, dm.heightPixels);
232        }
233
234        // Update the icon size
235        DeviceProfile grid = dynamicGrid.getDeviceProfile();
236        grid.updateFromConfiguration(context, context.getResources(),
237                realSize.x, realSize.y,
238                dm.widthPixels, dm.heightPixels);
239        return dynamicGrid;
240    }
241
242    public DynamicGrid getDynamicGrid() {
243        return mDynamicGrid;
244    }
245
246    public boolean isScreenLarge() {
247        return mIsScreenLarge;
248    }
249
250    // Need a version that doesn't require an instance of LauncherAppState for the wallpaper picker
251    public static boolean isScreenLarge(Resources res) {
252        return res.getBoolean(R.bool.is_large_tablet);
253    }
254
255    public static boolean isScreenLandscape(Context context) {
256        return context.getResources().getConfiguration().orientation ==
257            Configuration.ORIENTATION_LANDSCAPE;
258    }
259
260    public float getScreenDensity() {
261        return mScreenDensity;
262    }
263
264    public int getLongPressTimeout() {
265        return mLongPressTimeout;
266    }
267
268    public void onWallpaperChanged() {
269        mWallpaperChangedSinceLastCheck = true;
270    }
271
272    public boolean hasWallpaperChangedSinceLastCheck() {
273        boolean result = mWallpaperChangedSinceLastCheck;
274        mWallpaperChangedSinceLastCheck = false;
275        return result;
276    }
277
278    @Override
279    public void onAvailableSizeChanged(DeviceProfile grid) {
280        Utilities.setIconSize(grid.iconSizePx);
281    }
282
283    public static boolean isDogfoodBuild() {
284        return getInstance().mBuildInfo.isDogfoodBuild();
285    }
286
287    public void setPackageState(ArrayList<PackageInstallInfo> installInfo) {
288        mModel.setPackageState(installInfo);
289    }
290
291    /**
292     * Updates the icons and label of all icons for the provided package name.
293     */
294    public void updatePackageBadge(String packageName) {
295        mModel.updatePackageBadge(packageName);
296    }
297}
298