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/*
* Copyright (C) 2018 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.icons;
import android.content.ComponentName;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.database.sqlite.SQLiteException;
import android.os.SystemClock;
import android.os.UserHandle;
import android.text.TextUtils;
import android.util.Log;
import com.android.launcher3.LauncherAppState;
import com.android.launcher3.Utilities;
import com.android.launcher3.icons.BaseIconCache.IconDB;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.Stack;
/**
* Utility class to handle updating the Icon cache
*/
public class IconCacheUpdateHandler {
private static final String TAG = "IconCacheUpdateHandler";
private static final Object ICON_UPDATE_TOKEN = new Object();
private final HashMap<String, PackageInfo> mPkgInfoMap;
private final BaseIconCache mIconCache;
private final HashMap<UserHandle, Set<String>> mPackagesToIgnore = new HashMap<>();
IconCacheUpdateHandler(BaseIconCache cache) {
mIconCache = cache;
mPkgInfoMap = new HashMap<>();
// Remove all active icon update tasks.
mIconCache.mWorkerHandler.removeCallbacksAndMessages(ICON_UPDATE_TOKEN);
createPackageInfoMap();
}
public void setPackagesToIgnore(UserHandle userHandle, Set<String> packages) {
mPackagesToIgnore.put(userHandle, packages);
}
private void createPackageInfoMap() {
PackageManager pm = mIconCache.mPackageManager;
HashMap<String, PackageInfo> pkgInfoMap = new HashMap<>();
for (PackageInfo info : pm.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES)) {
pkgInfoMap.put(info.packageName, info);
}
}
/**
* Updates the persistent DB, such that only entries corresponding to {@param apps} remain in
* the DB and are updated.
* @return The set of packages for which icons have updated.
*/
public <T> void updateIcons(List<T> apps, CachingLogic<T> cachingLogic) {
if (apps.isEmpty()) {
return;
}
UserHandle user = cachingLogic.getUser(apps.get(0));
Set<String> ignorePackages = mPackagesToIgnore.get(user);
if (ignorePackages == null) {
ignorePackages = Collections.emptySet();
}
long userSerial = mIconCache.mUserManager.getSerialNumberForUser(user);
HashMap<ComponentName, T> componentMap = new HashMap<>();
for (T app : apps) {
componentMap.put(cachingLogic.getComponent(app), app);
}
HashSet<Integer> itemsToRemove = new HashSet<>();
Stack<T> appsToUpdate = new Stack<>();
try (Cursor c = mIconCache.mIconDb.query(
new String[]{IconDB.COLUMN_ROWID, IconDB.COLUMN_COMPONENT,
IconDB.COLUMN_LAST_UPDATED, IconDB.COLUMN_VERSION,
IconDB.COLUMN_SYSTEM_STATE},
IconDB.COLUMN_USER + " = ? ",
new String[]{Long.toString(userSerial)})) {
final int indexComponent = c.getColumnIndex(IconDB.COLUMN_COMPONENT);
final int indexLastUpdate = c.getColumnIndex(IconDB.COLUMN_LAST_UPDATED);
final int indexVersion = c.getColumnIndex(IconDB.COLUMN_VERSION);
final int rowIndex = c.getColumnIndex(IconDB.COLUMN_ROWID);
final int systemStateIndex = c.getColumnIndex(IconDB.COLUMN_SYSTEM_STATE);
while (c.moveToNext()) {
String cn = c.getString(indexComponent);
ComponentName component = ComponentName.unflattenFromString(cn);
PackageInfo info = mPkgInfoMap.get(component.getPackageName());
if (info == null) {
if (!ignorePackages.contains(component.getPackageName())) {
mIconCache.remove(component, user);
itemsToRemove.add(c.getInt(rowIndex));
}
continue;
}
if ((info.applicationInfo.flags & ApplicationInfo.FLAG_IS_DATA_ONLY) != 0) {
// Application is not present
continue;
}
long updateTime = c.getLong(indexLastUpdate);
int version = c.getInt(indexVersion);
T app = componentMap.remove(component);
if (version == info.versionCode && updateTime == info.lastUpdateTime &&
TextUtils.equals(c.getString(systemStateIndex),
mIconCache.mIconProvider.getIconSystemState(info.packageName))) {
continue;
}
if (app == null) {
mIconCache.remove(component, user);
itemsToRemove.add(c.getInt(rowIndex));
} else {
appsToUpdate.add(app);
}
}
} catch (SQLiteException e) {
Log.d(TAG, "Error reading icon cache", e);
// Continue updating whatever we have read so far
}
if (!itemsToRemove.isEmpty()) {
mIconCache.mIconDb.delete(
Utilities.createDbSelectionQuery(IconDB.COLUMN_ROWID, itemsToRemove), null);
}
// Insert remaining apps.
if (!componentMap.isEmpty() || !appsToUpdate.isEmpty()) {
Stack<T> appsToAdd = new Stack<>();
appsToAdd.addAll(componentMap.values());
new SerializedIconUpdateTask(userSerial, user, appsToAdd, appsToUpdate, cachingLogic)
.scheduleNext();
}
}
/**
* A runnable that updates invalid icons and adds missing icons in the DB for the provided
* LauncherActivityInfo list. Items are updated/added one at a time, so that the
* worker thread doesn't get blocked.
*/
private class SerializedIconUpdateTask<T> implements Runnable {
private final long mUserSerial;
private final UserHandle mUserHandle;
private final Stack<T> mAppsToAdd;
private final Stack<T> mAppsToUpdate;
private final CachingLogic<T> mCachingLogic;
private final HashSet<String> mUpdatedPackages = new HashSet<>();
SerializedIconUpdateTask(long userSerial, UserHandle userHandle,
Stack<T> appsToAdd, Stack<T> appsToUpdate, CachingLogic<T> cachingLogic) {
mUserHandle = userHandle;
mUserSerial = userSerial;
mAppsToAdd = appsToAdd;
mAppsToUpdate = appsToUpdate;
mCachingLogic = cachingLogic;
}
@Override
public void run() {
if (!mAppsToUpdate.isEmpty()) {
T app = mAppsToUpdate.pop();
String pkg = mCachingLogic.getComponent(app).getPackageName();
PackageInfo info = mPkgInfoMap.get(pkg);
mIconCache.addIconToDBAndMemCache(
app, mCachingLogic, info, mUserSerial, true /*replace existing*/);
mUpdatedPackages.add(pkg);
if (mAppsToUpdate.isEmpty() && !mUpdatedPackages.isEmpty()) {
// No more app to update. Notify model.
LauncherAppState.getInstance(mIconCache.mContext).getModel()
.onPackageIconsUpdated(mUpdatedPackages, mUserHandle);
}
// Let it run one more time.
scheduleNext();
} else if (!mAppsToAdd.isEmpty()) {
T app = mAppsToAdd.pop();
PackageInfo info = mPkgInfoMap.get(mCachingLogic.getComponent(app).getPackageName());
// We do not check the mPkgInfoMap when generating the mAppsToAdd. Although every
// app should have package info, this is not guaranteed by the api
if (info != null) {
mIconCache.addIconToDBAndMemCache(app, mCachingLogic, info,
mUserSerial, false /*replace existing*/);
}
if (!mAppsToAdd.isEmpty()) {
scheduleNext();
}
}
}
public void scheduleNext() {
mIconCache.mWorkerHandler.postAtTime(this, ICON_UPDATE_TOKEN,
SystemClock.uptimeMillis() + 1);
}
}
}
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