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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher3;
import android.app.SearchManager;
import android.content.*;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.database.ContentObserver;
import android.os.Handler;
import android.provider.Settings;
import android.util.Log;
import android.view.Display;
import java.lang.ref.WeakReference;
public class LauncherAppState implements DeviceProfile.DeviceProfileCallbacks {
private static final String TAG = "LauncherAppState";
private static final String SHARED_PREFERENCES_KEY = "com.android.launcher3.prefs";
private LauncherModel mModel;
private IconCache mIconCache;
private AppFilter mAppFilter;
private WidgetPreviewLoader.CacheDb mWidgetPreviewCacheDb;
private boolean mIsScreenLarge;
private float mScreenDensity;
private int mLongPressTimeout = 300;
private static WeakReference<LauncherProvider> sLauncherProvider;
private static Context sContext;
private static LauncherAppState INSTANCE;
private DynamicGrid mDynamicGrid;
public static LauncherAppState getInstance() {
if (INSTANCE == null) {
INSTANCE = new LauncherAppState();
}
return INSTANCE;
}
public static LauncherAppState getInstanceNoCreate() {
return INSTANCE;
}
public Context getContext() {
return sContext;
}
public static void setApplicationContext(Context context) {
if (sContext != null) {
Log.w(Launcher.TAG, "setApplicationContext called twice! old=" + sContext + " new=" + context);
}
sContext = context.getApplicationContext();
}
private LauncherAppState() {
if (sContext == null) {
throw new IllegalStateException("LauncherAppState inited before app context set");
}
Log.v(Launcher.TAG, "LauncherAppState inited");
if (sContext.getResources().getBoolean(R.bool.debug_memory_enabled)) {
MemoryTracker.startTrackingMe(sContext, "L");
}
// set sIsScreenXLarge and mScreenDensity *before* creating icon cache
mIsScreenLarge = isScreenLarge(sContext.getResources());
mScreenDensity = sContext.getResources().getDisplayMetrics().density;
mWidgetPreviewCacheDb = new WidgetPreviewLoader.CacheDb(sContext);
mIconCache = new IconCache(sContext);
mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
mModel = new LauncherModel(this, mIconCache, mAppFilter);
// Register intent receivers
IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);
filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
filter.addAction(Intent.ACTION_PACKAGE_CHANGED);
filter.addDataScheme("package");
sContext.registerReceiver(mModel, filter);
filter = new IntentFilter();
filter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
filter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE);
filter.addAction(Intent.ACTION_LOCALE_CHANGED);
filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
sContext.registerReceiver(mModel, filter);
filter = new IntentFilter();
filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
sContext.registerReceiver(mModel, filter);
filter = new IntentFilter();
filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
sContext.registerReceiver(mModel, filter);
// Register for changes to the favorites
ContentResolver resolver = sContext.getContentResolver();
resolver.registerContentObserver(LauncherSettings.Favorites.CONTENT_URI, true,
mFavoritesObserver);
}
/**
* Call from Application.onTerminate(), which is not guaranteed to ever be called.
*/
public void onTerminate() {
sContext.unregisterReceiver(mModel);
ContentResolver resolver = sContext.getContentResolver();
resolver.unregisterContentObserver(mFavoritesObserver);
}
/**
* Receives notifications whenever the user favorites have changed.
*/
private final ContentObserver mFavoritesObserver = new ContentObserver(new Handler()) {
@Override
public void onChange(boolean selfChange) {
// If the database has ever changed, then we really need to force a reload of the
// workspace on the next load
mModel.resetLoadedState(false, true);
mModel.startLoaderFromBackground();
}
};
LauncherModel setLauncher(Launcher launcher) {
if (mModel == null) {
throw new IllegalStateException("setLauncher() called before init()");
}
mModel.initialize(launcher);
return mModel;
}
IconCache getIconCache() {
return mIconCache;
}
LauncherModel getModel() {
return mModel;
}
boolean shouldShowAppOrWidgetProvider(ComponentName componentName) {
return mAppFilter == null || mAppFilter.shouldShowApp(componentName);
}
WidgetPreviewLoader.CacheDb getWidgetPreviewCacheDb() {
return mWidgetPreviewCacheDb;
}
static void setLauncherProvider(LauncherProvider provider) {
sLauncherProvider = new WeakReference<LauncherProvider>(provider);
}
static LauncherProvider getLauncherProvider() {
return sLauncherProvider.get();
}
public static String getSharedPreferencesKey() {
return SHARED_PREFERENCES_KEY;
}
DeviceProfile initDynamicGrid(Context context, int minWidth, int minHeight,
int width, int height,
int availableWidth, int availableHeight) {
if (mDynamicGrid == null) {
mDynamicGrid = new DynamicGrid(context,
context.getResources(),
minWidth, minHeight, width, height,
availableWidth, availableHeight);
mDynamicGrid.getDeviceProfile().addCallback(this);
}
// Update the icon size
DeviceProfile grid = mDynamicGrid.getDeviceProfile();
grid.updateFromConfiguration(context, context.getResources(), width, height,
availableWidth, availableHeight);
return grid;
}
public DynamicGrid getDynamicGrid() {
return mDynamicGrid;
}
public boolean isScreenLarge() {
return mIsScreenLarge;
}
// Need a version that doesn't require an instance of LauncherAppState for the wallpaper picker
public static boolean isScreenLarge(Resources res) {
return res.getBoolean(R.bool.is_large_tablet);
}
public static boolean isScreenLandscape(Context context) {
return context.getResources().getConfiguration().orientation ==
Configuration.ORIENTATION_LANDSCAPE;
}
public float getScreenDensity() {
return mScreenDensity;
}
public int getLongPressTimeout() {
return mLongPressTimeout;
}
@Override
public void onAvailableSizeChanged(DeviceProfile grid) {
Utilities.setIconSize(grid.iconSizePx);
}
}
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