LauncherAppState.java revision 957c13f032fc4088b3273cec08603c67c069e2c6 
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.Context;
23import android.content.Intent;
24import android.content.IntentFilter;
25import android.content.res.Configuration;
26import android.content.res.Resources;
27import android.graphics.Point;
28import android.os.Build;
29import android.util.DisplayMetrics;
30import android.util.Log;
31import android.view.Display;
32import android.view.WindowManager;
33
34import com.android.launcher3.compat.LauncherAppsCompat;
35import com.android.launcher3.compat.PackageInstallerCompat;
36import com.android.launcher3.compat.PackageInstallerCompat.PackageInstallInfo;
37import com.android.launcher3.util.Thunk;
38
39import java.lang.ref.WeakReference;
40import java.util.ArrayList;
41
42public class LauncherAppState implements DeviceProfile.DeviceProfileCallbacks {
43
44    private final AppFilter mAppFilter;
45    private final BuildInfo mBuildInfo;
46    @Thunk final LauncherModel mModel;
47    private final IconCache mIconCache;
48    private final WidgetPreviewLoader mWidgetCache;
49
50    private final boolean mIsScreenLarge;
51    private final float mScreenDensity;
52    private final int mLongPressTimeout = 300;
53
54    private boolean mWallpaperChangedSinceLastCheck;
55
56    private static WeakReference<LauncherProvider> sLauncherProvider;
57    private static Context sContext;
58
59    private static LauncherAppState INSTANCE;
60
61    private DynamicGrid mDynamicGrid;
62    private LauncherAccessibilityDelegate mAccessibilityDelegate;
63
64    public static LauncherAppState getInstance() {
65        if (INSTANCE == null) {
66            INSTANCE = new LauncherAppState();
67        }
68        return INSTANCE;
69    }
70
71    public static LauncherAppState getInstanceNoCreate() {
72        return INSTANCE;
73    }
74
75    public Context getContext() {
76        return sContext;
77    }
78
79    public static void setApplicationContext(Context context) {
80        if (sContext != null) {
81            Log.w(Launcher.TAG, "setApplicationContext called twice! old=" + sContext + " new=" + context);
82        }
83        sContext = context.getApplicationContext();
84    }
85
86    private LauncherAppState() {
87        if (sContext == null) {
88            throw new IllegalStateException("LauncherAppState inited before app context set");
89        }
90
91        Log.v(Launcher.TAG, "LauncherAppState inited");
92
93        if (sContext.getResources().getBoolean(R.bool.debug_memory_enabled)) {
94            MemoryTracker.startTrackingMe(sContext, "L");
95        }
96
97        // set sIsScreenXLarge and mScreenDensity *before* creating icon cache
98        mIsScreenLarge = isScreenLarge(sContext.getResources());
99        mScreenDensity = sContext.getResources().getDisplayMetrics().density;
100        mIconCache = new IconCache(sContext);
101        mWidgetCache = new WidgetPreviewLoader(sContext, mIconCache);
102
103        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
104        mBuildInfo = BuildInfo.loadByName(sContext.getString(R.string.build_info_class));
105        mModel = new LauncherModel(this, mIconCache, mAppFilter);
106
107        LauncherAppsCompat.getInstance(sContext).addOnAppsChangedCallback(mModel);
108
109        // Register intent receivers
110        IntentFilter filter = new IntentFilter();
111        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
112        filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
113        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
114        filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
115        // For handling managed profiles
116        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_ADDED);
117        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_REMOVED);
118
119        sContext.registerReceiver(mModel, filter);
120    }
121
122    /**
123     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
124     */
125    public void onTerminate() {
126        sContext.unregisterReceiver(mModel);
127        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
128        launcherApps.removeOnAppsChangedCallback(mModel);
129        PackageInstallerCompat.getInstance(sContext).onStop();
130    }
131
132    /**
133     * Reloads the workspace items from the DB and re-binds the workspace. This should generally
134     * not be called as DB updates are automatically followed by UI update
135     */
136    public void reloadWorkspace() {
137        mModel.resetLoadedState(false, true);
138        mModel.startLoaderFromBackground();
139    }
140
141    LauncherModel setLauncher(Launcher launcher) {
142        mModel.initialize(launcher);
143        mAccessibilityDelegate = ((launcher != null) && Utilities.isLmpOrAbove()) ?
144            new LauncherAccessibilityDelegate(launcher) : null;
145        return mModel;
146    }
147
148    public LauncherAccessibilityDelegate getAccessibilityDelegate() {
149        return mAccessibilityDelegate;
150    }
151
152    public IconCache getIconCache() {
153        return mIconCache;
154    }
155
156    public LauncherModel getModel() {
157        return mModel;
158    }
159
160    boolean shouldShowAppOrWidgetProvider(ComponentName componentName) {
161        return mAppFilter == null || mAppFilter.shouldShowApp(componentName);
162    }
163
164    static void setLauncherProvider(LauncherProvider provider) {
165        sLauncherProvider = new WeakReference<LauncherProvider>(provider);
166    }
167
168    static LauncherProvider getLauncherProvider() {
169        return sLauncherProvider.get();
170    }
171
172    public static String getSharedPreferencesKey() {
173        return LauncherFiles.SHARED_PREFERENCES_KEY;
174    }
175
176    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
177    DeviceProfile initDynamicGrid(Context context) {
178        mDynamicGrid = createDynamicGrid(context, mDynamicGrid);
179        mDynamicGrid.getDeviceProfile().addCallback(this);
180        return mDynamicGrid.getDeviceProfile();
181    }
182
183    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
184    static DynamicGrid createDynamicGrid(Context context, DynamicGrid dynamicGrid) {
185        // Determine the dynamic grid properties
186        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
187        Display display = wm.getDefaultDisplay();
188
189        Point realSize = new Point();
190        display.getRealSize(realSize);
191        DisplayMetrics dm = new DisplayMetrics();
192        display.getMetrics(dm);
193
194        if (dynamicGrid == null) {
195            Point smallestSize = new Point();
196            Point largestSize = new Point();
197            display.getCurrentSizeRange(smallestSize, largestSize);
198
199            dynamicGrid = new DynamicGrid(context,
200                    context.getResources(),
201                    Math.min(smallestSize.x, smallestSize.y),
202                    Math.min(largestSize.x, largestSize.y),
203                    realSize.x, realSize.y,
204                    dm.widthPixels, dm.heightPixels);
205        }
206
207        // Update the icon size
208        DeviceProfile grid = dynamicGrid.getDeviceProfile();
209        grid.updateFromConfiguration(context, context.getResources(),
210                realSize.x, realSize.y,
211                dm.widthPixels, dm.heightPixels);
212        return dynamicGrid;
213    }
214
215    public DynamicGrid getDynamicGrid() {
216        return mDynamicGrid;
217    }
218
219    public WidgetPreviewLoader getWidgetCache() {
220        return mWidgetCache;
221    }
222
223    public boolean isScreenLarge() {
224        return mIsScreenLarge;
225    }
226
227    // Need a version that doesn't require an instance of LauncherAppState for the wallpaper picker
228    public static boolean isScreenLarge(Resources res) {
229        return res.getBoolean(R.bool.is_large_tablet);
230    }
231
232    public static boolean isScreenLandscape(Context context) {
233        return context.getResources().getConfiguration().orientation ==
234            Configuration.ORIENTATION_LANDSCAPE;
235    }
236
237    public float getScreenDensity() {
238        return mScreenDensity;
239    }
240
241    public int getLongPressTimeout() {
242        return mLongPressTimeout;
243    }
244
245    public void onWallpaperChanged() {
246        mWallpaperChangedSinceLastCheck = true;
247    }
248
249    public boolean hasWallpaperChangedSinceLastCheck() {
250        boolean result = mWallpaperChangedSinceLastCheck;
251        mWallpaperChangedSinceLastCheck = false;
252        return result;
253    }
254
255    @Override
256    public void onAvailableSizeChanged(DeviceProfile grid) {
257        Utilities.setIconSize(grid.iconSizePx);
258    }
259
260    public static boolean isDogfoodBuild() {
261        return getInstance().mBuildInfo.isDogfoodBuild();
262    }
263}
264