LauncherAppState.java revision 1d4a2df091e2b5928406ea503321563a0ec8a01e 
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        sContext.registerReceiver(mModel, filter);
116    }
117
118    /**
119     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
120     */
121    public void onTerminate() {
122        sContext.unregisterReceiver(mModel);
123        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
124        launcherApps.removeOnAppsChangedCallback(mModel);
125        PackageInstallerCompat.getInstance(sContext).onStop();
126    }
127
128    /**
129     * Reloads the workspace items from the DB and re-binds the workspace. This should generally
130     * not be called as DB updates are automatically followed by UI update
131     */
132    public void reloadWorkspace() {
133        mModel.resetLoadedState(false, true);
134        mModel.startLoaderFromBackground();
135    }
136
137    LauncherModel setLauncher(Launcher launcher) {
138        mModel.initialize(launcher);
139        mAccessibilityDelegate = ((launcher != null) && Utilities.isLmpOrAbove()) ?
140            new LauncherAccessibilityDelegate(launcher) : null;
141        return mModel;
142    }
143
144    LauncherAccessibilityDelegate getAccessibilityDelegate() {
145        return mAccessibilityDelegate;
146    }
147
148    public IconCache getIconCache() {
149        return mIconCache;
150    }
151
152    LauncherModel getModel() {
153        return mModel;
154    }
155
156    boolean shouldShowAppOrWidgetProvider(ComponentName componentName) {
157        return mAppFilter == null || mAppFilter.shouldShowApp(componentName);
158    }
159
160    static void setLauncherProvider(LauncherProvider provider) {
161        sLauncherProvider = new WeakReference<LauncherProvider>(provider);
162    }
163
164    static LauncherProvider getLauncherProvider() {
165        return sLauncherProvider.get();
166    }
167
168    public static String getSharedPreferencesKey() {
169        return LauncherFiles.SHARED_PREFERENCES_KEY;
170    }
171
172    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
173    DeviceProfile initDynamicGrid(Context context) {
174        mDynamicGrid = createDynamicGrid(context, mDynamicGrid);
175        mDynamicGrid.getDeviceProfile().addCallback(this);
176        return mDynamicGrid.getDeviceProfile();
177    }
178
179    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
180    static DynamicGrid createDynamicGrid(Context context, DynamicGrid dynamicGrid) {
181        // Determine the dynamic grid properties
182        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
183        Display display = wm.getDefaultDisplay();
184
185        Point realSize = new Point();
186        display.getRealSize(realSize);
187        DisplayMetrics dm = new DisplayMetrics();
188        display.getMetrics(dm);
189
190        if (dynamicGrid == null) {
191            Point smallestSize = new Point();
192            Point largestSize = new Point();
193            display.getCurrentSizeRange(smallestSize, largestSize);
194
195            dynamicGrid = new DynamicGrid(context,
196                    context.getResources(),
197                    Math.min(smallestSize.x, smallestSize.y),
198                    Math.min(largestSize.x, largestSize.y),
199                    realSize.x, realSize.y,
200                    dm.widthPixels, dm.heightPixels);
201        }
202
203        // Update the icon size
204        DeviceProfile grid = dynamicGrid.getDeviceProfile();
205        grid.updateFromConfiguration(context, context.getResources(),
206                realSize.x, realSize.y,
207                dm.widthPixels, dm.heightPixels);
208        return dynamicGrid;
209    }
210
211    public DynamicGrid getDynamicGrid() {
212        return mDynamicGrid;
213    }
214
215    public WidgetPreviewLoader getWidgetCache() {
216        return mWidgetCache;
217    }
218
219    public boolean isScreenLarge() {
220        return mIsScreenLarge;
221    }
222
223    // Need a version that doesn't require an instance of LauncherAppState for the wallpaper picker
224    public static boolean isScreenLarge(Resources res) {
225        return res.getBoolean(R.bool.is_large_tablet);
226    }
227
228    public static boolean isScreenLandscape(Context context) {
229        return context.getResources().getConfiguration().orientation ==
230            Configuration.ORIENTATION_LANDSCAPE;
231    }
232
233    public float getScreenDensity() {
234        return mScreenDensity;
235    }
236
237    public int getLongPressTimeout() {
238        return mLongPressTimeout;
239    }
240
241    public void onWallpaperChanged() {
242        mWallpaperChangedSinceLastCheck = true;
243    }
244
245    public boolean hasWallpaperChangedSinceLastCheck() {
246        boolean result = mWallpaperChangedSinceLastCheck;
247        mWallpaperChangedSinceLastCheck = false;
248        return result;
249    }
250
251    @Override
252    public void onAvailableSizeChanged(DeviceProfile grid) {
253        Utilities.setIconSize(grid.iconSizePx);
254    }
255
256    public static boolean isDogfoodBuild() {
257        return getInstance().mBuildInfo.isDogfoodBuild();
258    }
259
260    public void setPackageState(ArrayList<PackageInstallInfo> installInfo) {
261        mModel.setPackageState(installInfo);
262    }
263
264    /**
265     * Updates the icons and label of all icons for the provided package name.
266     */
267    public void updatePackageBadge(String packageName) {
268        mModel.updatePackageBadge(packageName);
269    }
270}
271