LauncherAppState.java revision 27595796b3c0373d1a1d56af9a30392bc7016624 
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 LauncherAccessibilityDelegate 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
111        LauncherAppsCompat.getInstance(sContext).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        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
118        filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
119        sContext.registerReceiver(mModel, filter);
120
121        // Register for changes to the favorites
122        ContentResolver resolver = sContext.getContentResolver();
123        resolver.registerContentObserver(LauncherSettings.Favorites.CONTENT_URI, true,
124                mFavoritesObserver);
125    }
126
127    public void recreateWidgetPreviewDb() {
128        if (mWidgetPreviewCacheDb != null) {
129            mWidgetPreviewCacheDb.close();
130        }
131        mWidgetPreviewCacheDb = new WidgetPreviewLoader.CacheDb(sContext);
132    }
133
134    /**
135     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
136     */
137    public void onTerminate() {
138        sContext.unregisterReceiver(mModel);
139        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
140        launcherApps.removeOnAppsChangedCallback(mModel);
141        PackageInstallerCompat.getInstance(sContext).onStop();
142
143        ContentResolver resolver = sContext.getContentResolver();
144        resolver.unregisterContentObserver(mFavoritesObserver);
145    }
146
147    /**
148     * Receives notifications whenever the user favorites have changed.
149     */
150    private final ContentObserver mFavoritesObserver = new ContentObserver(new Handler()) {
151        @Override
152        public void onChange(boolean selfChange) {
153            // If the database has ever changed, then we really need to force a reload of the
154            // workspace on the next load
155            mModel.resetLoadedState(false, true);
156            mModel.startLoaderFromBackground();
157        }
158    };
159
160    LauncherModel setLauncher(Launcher launcher) {
161        mModel.initialize(launcher);
162        mAccessibilityDelegate = ((launcher != null) && Utilities.isLmpOrAbove()) ?
163            new LauncherAccessibilityDelegate(launcher) : null;
164        return mModel;
165    }
166
167    LauncherAccessibilityDelegate getAccessibilityDelegate() {
168        return mAccessibilityDelegate;
169    }
170
171    public IconCache getIconCache() {
172        return mIconCache;
173    }
174
175    LauncherModel getModel() {
176        return mModel;
177    }
178
179    boolean shouldShowAppOrWidgetProvider(ComponentName componentName) {
180        return mAppFilter == null || mAppFilter.shouldShowApp(componentName);
181    }
182
183    WidgetPreviewLoader.CacheDb getWidgetPreviewCacheDb() {
184        return mWidgetPreviewCacheDb;
185    }
186
187    static void setLauncherProvider(LauncherProvider provider) {
188        sLauncherProvider = new WeakReference<LauncherProvider>(provider);
189    }
190
191    static LauncherProvider getLauncherProvider() {
192        return sLauncherProvider.get();
193    }
194
195    public static String getSharedPreferencesKey() {
196        return LauncherFiles.SHARED_PREFERENCES_KEY;
197    }
198
199    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
200    DeviceProfile initDynamicGrid(Context context) {
201        mDynamicGrid = createDynamicGrid(context, mDynamicGrid);
202        mDynamicGrid.getDeviceProfile().addCallback(this);
203        return mDynamicGrid.getDeviceProfile();
204    }
205
206    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
207    static DynamicGrid createDynamicGrid(Context context, DynamicGrid dynamicGrid) {
208        // Determine the dynamic grid properties
209        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
210        Display display = wm.getDefaultDisplay();
211
212        Point realSize = new Point();
213        display.getRealSize(realSize);
214        DisplayMetrics dm = new DisplayMetrics();
215        display.getMetrics(dm);
216
217        if (dynamicGrid == null) {
218            Point smallestSize = new Point();
219            Point largestSize = new Point();
220            display.getCurrentSizeRange(smallestSize, largestSize);
221
222            dynamicGrid = new DynamicGrid(context,
223                    context.getResources(),
224                    Math.min(smallestSize.x, smallestSize.y),
225                    Math.min(largestSize.x, largestSize.y),
226                    realSize.x, realSize.y,
227                    dm.widthPixels, dm.heightPixels);
228        }
229
230        // Update the icon size
231        DeviceProfile grid = dynamicGrid.getDeviceProfile();
232        grid.updateFromConfiguration(context, context.getResources(),
233                realSize.x, realSize.y,
234                dm.widthPixels, dm.heightPixels);
235        return dynamicGrid;
236    }
237
238    public DynamicGrid getDynamicGrid() {
239        return mDynamicGrid;
240    }
241
242    public boolean isScreenLarge() {
243        return mIsScreenLarge;
244    }
245
246    // Need a version that doesn't require an instance of LauncherAppState for the wallpaper picker
247    public static boolean isScreenLarge(Resources res) {
248        return res.getBoolean(R.bool.is_large_tablet);
249    }
250
251    public static boolean isScreenLandscape(Context context) {
252        return context.getResources().getConfiguration().orientation ==
253            Configuration.ORIENTATION_LANDSCAPE;
254    }
255
256    public float getScreenDensity() {
257        return mScreenDensity;
258    }
259
260    public int getLongPressTimeout() {
261        return mLongPressTimeout;
262    }
263
264    public void onWallpaperChanged() {
265        mWallpaperChangedSinceLastCheck = true;
266    }
267
268    public boolean hasWallpaperChangedSinceLastCheck() {
269        boolean result = mWallpaperChangedSinceLastCheck;
270        mWallpaperChangedSinceLastCheck = false;
271        return result;
272    }
273
274    @Override
275    public void onAvailableSizeChanged(DeviceProfile grid) {
276        Utilities.setIconSize(grid.iconSizePx);
277    }
278
279    public static boolean isDogfoodBuild() {
280        return getInstance().mBuildInfo.isDogfoodBuild();
281    }
282
283    public void setPackageState(ArrayList<PackageInstallInfo> installInfo) {
284        mModel.setPackageState(installInfo);
285    }
286
287    /**
288     * Updates the icons and label of all icons for the provided package name.
289     */
290    public void updatePackageBadge(String packageName) {
291        mModel.updatePackageBadge(packageName);
292    }
293}
294