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/*
* Copyright (C) 2011 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 org.kelar.inputmethod.latin;
import org.kelar.inputmethod.dictionarypack.DictionaryPackConstants;
import org.kelar.inputmethod.latin.utils.TargetPackageInfoGetterTask;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ProviderInfo;
import android.net.Uri;
import android.util.Log;
/**
* Receives broadcasts pertaining to dictionary management and takes the appropriate action.
*
* This object receives three types of broadcasts.
* - Package installed/added. When a dictionary provider application is added or removed, we
* need to query the dictionaries.
* - New dictionary broadcast. The dictionary provider broadcasts new dictionary availability. When
* this happens, we need to re-query the dictionaries.
* - Unknown client. If the dictionary provider is in urgent need of data about some client that
* it does not know, it sends this broadcast. When we receive this, we need to tell the dictionary
* provider about ourselves. This happens when the settings for the dictionary pack are accessed,
* but Latin IME never got a chance to register itself.
*/
public final class DictionaryPackInstallBroadcastReceiver extends BroadcastReceiver {
private static final String TAG = DictionaryPackInstallBroadcastReceiver.class.getSimpleName();
final LatinIME mService;
public DictionaryPackInstallBroadcastReceiver() {
// This empty constructor is necessary for the system to instantiate this receiver.
// This happens when the dictionary pack says it can't find a record for our client,
// which happens when the dictionary pack settings are called before the keyboard
// was ever started once.
Log.i(TAG, "Latin IME dictionary broadcast receiver instantiated from the framework.");
mService = null;
}
public DictionaryPackInstallBroadcastReceiver(final LatinIME service) {
mService = service;
}
@Override
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
final PackageManager manager = context.getPackageManager();
// We need to reread the dictionary if a new dictionary package is installed.
if (action.equals(Intent.ACTION_PACKAGE_ADDED)) {
if (null == mService) {
Log.e(TAG, "Called with intent " + action + " but we don't know the service: this "
+ "should never happen");
return;
}
final Uri packageUri = intent.getData();
if (null == packageUri) return; // No package name : we can't do anything
final String packageName = packageUri.getSchemeSpecificPart();
if (null == packageName) return;
// TODO: do this in a more appropriate place
TargetPackageInfoGetterTask.removeCachedPackageInfo(packageName);
final PackageInfo packageInfo;
try {
packageInfo = manager.getPackageInfo(packageName, PackageManager.GET_PROVIDERS);
} catch (android.content.pm.PackageManager.NameNotFoundException e) {
return; // No package info : we can't do anything
}
final ProviderInfo[] providers = packageInfo.providers;
if (null == providers) return; // No providers : it is not a dictionary.
// Search for some dictionary pack in the just-installed package. If found, reread.
for (ProviderInfo info : providers) {
if (DictionaryPackConstants.AUTHORITY.equals(info.authority)) {
mService.resetSuggestMainDict();
return;
}
}
// If we come here none of the authorities matched the one we searched for.
// We can exit safely.
return;
} else if (action.equals(Intent.ACTION_PACKAGE_REMOVED)
&& !intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) {
if (null == mService) {
Log.e(TAG, "Called with intent " + action + " but we don't know the service: this "
+ "should never happen");
return;
}
// When the dictionary package is removed, we need to reread dictionary (to use the
// next-priority one, or stop using a dictionary at all if this was the only one,
// since this is the user request).
// If we are replacing the package, we will receive ADDED right away so no need to
// remove the dictionary at the moment, since we will do it when we receive the
// ADDED broadcast.
// TODO: Only reload dictionary on REMOVED when the removed package is the one we
// read dictionary from?
mService.resetSuggestMainDict();
} else if (action.equals(DictionaryPackConstants.NEW_DICTIONARY_INTENT_ACTION)) {
if (null == mService) {
Log.e(TAG, "Called with intent " + action + " but we don't know the service: this "
+ "should never happen");
return;
}
mService.resetSuggestMainDict();
} else if (action.equals(DictionaryPackConstants.UNKNOWN_DICTIONARY_PROVIDER_CLIENT)) {
if (null != mService) {
// Careful! This is returning if the service is NOT null. This is because we
// should come here instantiated by the framework in reaction to a broadcast of
// the above action, so we should gave gone through the no-args constructor.
Log.e(TAG, "Called with intent " + action + " but we have a reference to the "
+ "service: this should never happen");
return;
}
// The dictionary provider does not know about some client. We check that it's really
// us that it needs to know about, and if it's the case, we register with the provider.
final String wantedClientId =
intent.getStringExtra(DictionaryPackConstants.DICTIONARY_PROVIDER_CLIENT_EXTRA);
final String myClientId = context.getString(R.string.dictionary_pack_client_id);
if (!wantedClientId.equals(myClientId)) return; // Not for us
BinaryDictionaryFileDumper.initializeClientRecordHelper(context, myClientId);
}
}
}
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