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/*
* Copyright (C) 2009 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 java.util.ArrayList;
import java.util.List;
import android.annotation.SdkConstant;
import android.annotation.SdkConstant.SdkConstantType;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.pm.ServiceInfo;
import android.content.pm.Signature;
import android.content.pm.PackageManager.NameNotFoundException;
import android.util.Log;
/**
* Class for managing the relationship between the {@link WebView} and installed
* plugins in the system. You can find this class through
* {@link PluginManager#getInstance}.
*
* @hide pending API solidification
*/
public class PluginManager {
/**
* Service Action: A plugin wishes to be loaded in the WebView must provide
* {@link android.content.IntentFilter IntentFilter} that accepts this
* action in their AndroidManifest.xml.
* <p>
* TODO: we may change this to a new PLUGIN_ACTION if this is going to be
* public.
*/
@SdkConstant(SdkConstantType.SERVICE_ACTION)
public static final String PLUGIN_ACTION = "android.webkit.PLUGIN";
/**
* A plugin wishes to be loaded in the WebView must provide this permission
* in their AndroidManifest.xml.
*/
public static final String PLUGIN_PERMISSION = "android.webkit.permission.PLUGIN";
private static final String LOGTAG = "webkit";
private static PluginManager mInstance = null;
private final Context mContext;
private PluginManager(Context context) {
mContext = context;
}
public static synchronized PluginManager getInstance(Context context) {
if (mInstance == null) {
if (context == null) {
throw new IllegalStateException(
"First call to PluginManager need a valid context.");
}
mInstance = new PluginManager(context);
}
return mInstance;
}
/**
* Signal the WebCore thread to refresh its list of plugins. Use this if the
* directory contents of one of the plugin directories has been modified and
* needs its changes reflecting. May cause plugin load and/or unload.
*
* @param reloadOpenPages Set to true to reload all open pages.
*/
public void refreshPlugins(boolean reloadOpenPages) {
BrowserFrame.sJavaBridge.obtainMessage(
JWebCoreJavaBridge.REFRESH_PLUGINS, reloadOpenPages)
.sendToTarget();
}
String[] getPluginDirecoties() {
ArrayList<String> directories = new ArrayList<String>();
PackageManager pm = mContext.getPackageManager();
List<ResolveInfo> plugins = pm.queryIntentServices(new Intent(
PLUGIN_ACTION), PackageManager.GET_SERVICES);
for (ResolveInfo info : plugins) {
ServiceInfo serviceInfo = info.serviceInfo;
if (serviceInfo == null) {
Log.w(LOGTAG, "Ignore bad plugin");
continue;
}
PackageInfo pkgInfo;
try {
pkgInfo = pm.getPackageInfo(serviceInfo.packageName,
PackageManager.GET_PERMISSIONS
| PackageManager.GET_SIGNATURES);
} catch (NameNotFoundException e) {
Log.w(LOGTAG, "Cant find plugin: " + serviceInfo.packageName);
continue;
}
if (pkgInfo == null) {
continue;
}
String directory = pkgInfo.applicationInfo.dataDir + "/lib";
if (directories.contains(directory)) {
continue;
}
String permissions[] = pkgInfo.requestedPermissions;
if (permissions == null) {
continue;
}
boolean permissionOk = false;
for (String permit : permissions) {
if (PLUGIN_PERMISSION.equals(permit)) {
permissionOk = true;
break;
}
}
if (!permissionOk) {
continue;
}
Signature signatures[] = pkgInfo.signatures;
if (signatures == null) {
continue;
}
boolean signatureMatch = false;
for (Signature signature : signatures) {
// TODO: check signature against Google provided one
signatureMatch = true;
break;
}
if (!signatureMatch) {
continue;
}
directories.add(directory);
}
// hack for gears for now
String gears = mContext.getDir("plugins", 0).getPath();
if (!directories.contains(gears)) {
directories.add(gears);
}
return directories.toArray(new String[directories.size()]);
}
}
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