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/*
* Copyright (C) 2024 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 android.webkit;
import android.annotation.FlaggedApi;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.RequiresFeature;
import android.annotation.RequiresPermission;
import android.annotation.SuppressLint;
import android.annotation.SystemApi;
import android.app.SystemServiceRegistry;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.RemoteException;
/** @hide */
@FlaggedApi(Flags.FLAG_UPDATE_SERVICE_IPC_WRAPPER)
@SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
public final class WebViewUpdateManager {
private final IWebViewUpdateService mService;
/** @hide */
public WebViewUpdateManager(@NonNull IWebViewUpdateService service) {
mService = service;
}
/**
* Get the singleton instance of the manager.
*
* <p>This exists for the benefit of callsites without a {@link Context}; prefer
* {@link Context#getSystemService(Class)} otherwise.
*
* <p>This must only be called on devices with {@link PackageManager#FEATURE_WEBVIEW},
* and will WTF or throw {@link UnsupportedOperationException} otherwise.
*/
@SuppressLint("ManagerLookup") // service opts in to getSystemServiceWithNoContext()
@RequiresFeature(PackageManager.FEATURE_WEBVIEW)
public static @NonNull WebViewUpdateManager getInstance() {
WebViewUpdateManager manager =
(WebViewUpdateManager) SystemServiceRegistry.getSystemServiceWithNoContext(
Context.WEBVIEW_UPDATE_SERVICE);
if (manager == null) {
throw new UnsupportedOperationException("WebView not supported by device");
} else {
return manager;
}
}
/**
* Block until system-level WebView preparations are complete.
*
* <p>This also makes the current WebView provider package visible to the caller.
*
* @return the status of WebView preparation and the current provider package.
*/
public @NonNull WebViewProviderResponse waitForAndGetProvider() {
try {
return mService.waitForAndGetProvider();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Get the package that is the system's current WebView implementation.
*
* @return the package, or null if no valid implementation is present.
*/
public @Nullable PackageInfo getCurrentWebViewPackage() {
try {
return mService.getCurrentWebViewPackage();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Get the complete list of supported WebView providers for this device.
*
* <p>This includes all configured providers, regardless of whether they are currently available
* or valid.
*/
@SuppressLint({"ParcelableList", "ArrayReturn"})
public @NonNull WebViewProviderInfo[] getAllWebViewPackages() {
try {
return mService.getAllWebViewPackages();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Get the list of currently-valid WebView providers for this device.
*
* <p>This only includes providers that are currently present on the device and meet the
* validity criteria (signature, version, etc), but does not check if the provider is installed
* and enabled for all users.
*
* <p>Note that this will be filtered by the caller's package visibility; callers should
* have QUERY_ALL_PACKAGES permission to ensure that the list is complete.
*/
@SuppressLint({"ParcelableList", "ArrayReturn"})
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS)
public @NonNull WebViewProviderInfo[] getValidWebViewPackages() {
try {
return mService.getValidWebViewPackages();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Get the package name of the current WebView implementation.
*
* @return the package name, or null if no valid implementation is present.
*/
public @Nullable String getCurrentWebViewPackageName() {
try {
return mService.getCurrentWebViewPackageName();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Ask the system to switch to a specific WebView implementation if possible.
*
* <p>This choice will be stored persistently.
*
* @param newProvider the package name to use.
* @return the package name which is now in use, which may not be the
* requested one if it was not usable.
*/
@RequiresPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS)
public @Nullable String changeProviderAndSetting(@NonNull String newProvider) {
try {
return mService.changeProviderAndSetting(newProvider);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Used by the relro file creator to notify the service that it's done.
* @hide
*/
void notifyRelroCreationCompleted() {
try {
mService.notifyRelroCreationCompleted();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Get the WebView provider which will be used if no explicit choice has been made.
*
* <p>The default provider is not guaranteed to be a valid/usable WebView implementation.
*
* @return the default WebView provider.
*/
@FlaggedApi(Flags.FLAG_UPDATE_SERVICE_V2)
public @NonNull WebViewProviderInfo getDefaultWebViewPackage() {
try {
return mService.getDefaultWebViewPackage();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
}
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