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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 com.android.server;
import com.android.internal.content.PackageMonitor;
import com.android.internal.textservice.ISpellCheckerService;
import com.android.internal.textservice.ISpellCheckerSession;
import com.android.internal.textservice.ISpellCheckerSessionListener;
import com.android.internal.textservice.ITextServicesManager;
import com.android.internal.textservice.ITextServicesSessionListener;
import org.xmlpull.v1.XmlPullParserException;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.pm.ServiceInfo;
import android.os.Binder;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.provider.Settings;
import android.service.textservice.SpellCheckerService;
import android.text.TextUtils;
import android.util.Slog;
import android.view.textservice.SpellCheckerInfo;
import android.view.textservice.SpellCheckerSubtype;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class TextServicesManagerService extends ITextServicesManager.Stub {
private static final String TAG = TextServicesManagerService.class.getSimpleName();
private static final boolean DBG = false;
private final Context mContext;
private boolean mSystemReady;
private final TextServicesMonitor mMonitor;
private final HashMap<String, SpellCheckerInfo> mSpellCheckerMap =
new HashMap<String, SpellCheckerInfo>();
private final ArrayList<SpellCheckerInfo> mSpellCheckerList = new ArrayList<SpellCheckerInfo>();
private final HashMap<String, SpellCheckerBindGroup> mSpellCheckerBindGroups =
new HashMap<String, SpellCheckerBindGroup>();
public void systemReady() {
if (!mSystemReady) {
mSystemReady = true;
}
}
public TextServicesManagerService(Context context) {
mSystemReady = false;
mContext = context;
mMonitor = new TextServicesMonitor();
mMonitor.register(context, true);
synchronized (mSpellCheckerMap) {
buildSpellCheckerMapLocked(context, mSpellCheckerList, mSpellCheckerMap);
}
SpellCheckerInfo sci = getCurrentSpellChecker(null);
if (sci == null) {
sci = findAvailSpellCheckerLocked(null, null);
if (sci != null) {
// Set the current spell checker if there is one or more spell checkers
// available. In this case, "sci" is the first one in the available spell
// checkers.
setCurrentSpellCheckerLocked(sci.getId());
}
}
}
private class TextServicesMonitor extends PackageMonitor {
@Override
public void onSomePackagesChanged() {
synchronized (mSpellCheckerMap) {
buildSpellCheckerMapLocked(mContext, mSpellCheckerList, mSpellCheckerMap);
// TODO: Update for each locale
SpellCheckerInfo sci = getCurrentSpellChecker(null);
if (sci == null) return;
final String packageName = sci.getPackageName();
final int change = isPackageDisappearing(packageName);
if (// Package disappearing
change == PACKAGE_PERMANENT_CHANGE || change == PACKAGE_TEMPORARY_CHANGE
// Package modified
|| isPackageModified(packageName)) {
sci = findAvailSpellCheckerLocked(null, packageName);
if (sci != null) {
setCurrentSpellCheckerLocked(sci.getId());
}
}
}
}
}
private static void buildSpellCheckerMapLocked(Context context,
ArrayList<SpellCheckerInfo> list, HashMap<String, SpellCheckerInfo> map) {
list.clear();
map.clear();
final PackageManager pm = context.getPackageManager();
List<ResolveInfo> services = pm.queryIntentServices(
new Intent(SpellCheckerService.SERVICE_INTERFACE), PackageManager.GET_META_DATA);
final int N = services.size();
for (int i = 0; i < N; ++i) {
final ResolveInfo ri = services.get(i);
final ServiceInfo si = ri.serviceInfo;
final ComponentName compName = new ComponentName(si.packageName, si.name);
if (!android.Manifest.permission.BIND_TEXT_SERVICE.equals(si.permission)) {
Slog.w(TAG, "Skipping text service " + compName
+ ": it does not require the permission "
+ android.Manifest.permission.BIND_TEXT_SERVICE);
continue;
}
if (DBG) Slog.d(TAG, "Add: " + compName);
try {
final SpellCheckerInfo sci = new SpellCheckerInfo(context, ri);
if (sci.getSubtypeCount() <= 0) {
Slog.w(TAG, "Skipping text service " + compName
+ ": it does not contain subtypes.");
continue;
}
list.add(sci);
map.put(sci.getId(), sci);
} catch (XmlPullParserException e) {
Slog.w(TAG, "Unable to load the spell checker " + compName, e);
} catch (IOException e) {
Slog.w(TAG, "Unable to load the spell checker " + compName, e);
}
}
if (DBG) {
Slog.d(TAG, "buildSpellCheckerMapLocked: " + list.size() + "," + map.size());
}
}
// TODO: find an appropriate spell checker for specified locale
private SpellCheckerInfo findAvailSpellCheckerLocked(String locale, String prefPackage) {
final int spellCheckersCount = mSpellCheckerList.size();
if (spellCheckersCount == 0) {
Slog.w(TAG, "no available spell checker services found");
return null;
}
if (prefPackage != null) {
for (int i = 0; i < spellCheckersCount; ++i) {
final SpellCheckerInfo sci = mSpellCheckerList.get(i);
if (prefPackage.equals(sci.getPackageName())) {
if (DBG) {
Slog.d(TAG, "findAvailSpellCheckerLocked: " + sci.getPackageName());
}
return sci;
}
}
}
if (spellCheckersCount > 1) {
Slog.w(TAG, "more than one spell checker service found, picking first");
}
return mSpellCheckerList.get(0);
}
// TODO: Save SpellCheckerService by supported languages. Currently only one spell
// checker is saved.
@Override
public SpellCheckerInfo getCurrentSpellChecker(String locale) {
synchronized (mSpellCheckerMap) {
final String curSpellCheckerId =
Settings.Secure.getString(mContext.getContentResolver(),
Settings.Secure.SELECTED_SPELL_CHECKER);
if (DBG) {
Slog.w(TAG, "getCurrentSpellChecker: " + curSpellCheckerId);
}
if (TextUtils.isEmpty(curSpellCheckerId)) {
return null;
}
return mSpellCheckerMap.get(curSpellCheckerId);
}
}
// TODO: Respect allowImplicitlySelectedSubtype
// TODO: Save SpellCheckerSubtype by supported languages.
@Override
public SpellCheckerSubtype getCurrentSpellCheckerSubtype(
String locale, boolean allowImplicitlySelectedSubtype) {
synchronized (mSpellCheckerMap) {
final String subtypeHashCodeStr =
Settings.Secure.getString(mContext.getContentResolver(),
Settings.Secure.SELECTED_SPELL_CHECKER_SUBTYPE);
if (DBG) {
Slog.w(TAG, "getCurrentSpellChecker: " + subtypeHashCodeStr);
}
final SpellCheckerInfo sci = getCurrentSpellChecker(null);
if (sci == null || sci.getSubtypeCount() == 0) {
if (DBG) {
Slog.w(TAG, "Subtype not found.");
}
return null;
}
final int hashCode;
if (!TextUtils.isEmpty(subtypeHashCodeStr)) {
hashCode = Integer.valueOf(subtypeHashCodeStr);
} else {
hashCode = 0;
}
if (hashCode == 0 && !allowImplicitlySelectedSubtype) {
return null;
}
final String systemLocale =
mContext.getResources().getConfiguration().locale.toString();
SpellCheckerSubtype candidate = null;
for (int i = 0; i < sci.getSubtypeCount(); ++i) {
final SpellCheckerSubtype scs = sci.getSubtypeAt(i);
if (hashCode == 0) {
if (systemLocale.equals(locale)) {
return scs;
} else if (candidate == null) {
final String scsLocale = scs.getLocale();
if (systemLocale.length() >= 2
&& scsLocale.length() >= 2
&& systemLocale.substring(0, 2).equals(
scsLocale.substring(0, 2))) {
candidate = scs;
}
}
} else if (scs.hashCode() == hashCode) {
if (DBG) {
Slog.w(TAG, "Return subtype " + scs.hashCode());
}
return scs;
}
}
return candidate;
}
}
@Override
public void getSpellCheckerService(String sciId, String locale,
ITextServicesSessionListener tsListener, ISpellCheckerSessionListener scListener,
Bundle bundle) {
if (!mSystemReady) {
return;
}
if (TextUtils.isEmpty(sciId) || tsListener == null || scListener == null) {
Slog.e(TAG, "getSpellCheckerService: Invalid input.");
return;
}
synchronized(mSpellCheckerMap) {
if (!mSpellCheckerMap.containsKey(sciId)) {
return;
}
final SpellCheckerInfo sci = mSpellCheckerMap.get(sciId);
final int uid = Binder.getCallingUid();
if (mSpellCheckerBindGroups.containsKey(sciId)) {
final SpellCheckerBindGroup bindGroup = mSpellCheckerBindGroups.get(sciId);
if (bindGroup != null) {
final InternalDeathRecipient recipient =
mSpellCheckerBindGroups.get(sciId).addListener(
tsListener, locale, scListener, uid, bundle);
if (recipient == null) {
if (DBG) {
Slog.w(TAG, "Didn't create a death recipient.");
}
return;
}
if (bindGroup.mSpellChecker == null & bindGroup.mConnected) {
Slog.e(TAG, "The state of the spell checker bind group is illegal.");
bindGroup.removeAll();
} else if (bindGroup.mSpellChecker != null) {
if (DBG) {
Slog.w(TAG, "Existing bind found. Return a spell checker session now. "
+ "Listeners count = " + bindGroup.mListeners.size());
}
try {
final ISpellCheckerSession session =
bindGroup.mSpellChecker.getISpellCheckerSession(
recipient.mScLocale, recipient.mScListener, bundle);
if (session != null) {
tsListener.onServiceConnected(session);
return;
} else {
if (DBG) {
Slog.w(TAG, "Existing bind already expired. ");
}
bindGroup.removeAll();
}
} catch (RemoteException e) {
Slog.e(TAG, "Exception in getting spell checker session: " + e);
bindGroup.removeAll();
}
}
}
}
final long ident = Binder.clearCallingIdentity();
try {
startSpellCheckerServiceInnerLocked(
sci, locale, tsListener, scListener, uid, bundle);
} finally {
Binder.restoreCallingIdentity(ident);
}
}
return;
}
@Override
public boolean isSpellCheckerEnabled() {
synchronized(mSpellCheckerMap) {
return isSpellCheckerEnabledLocked();
}
}
private void startSpellCheckerServiceInnerLocked(SpellCheckerInfo info, String locale,
ITextServicesSessionListener tsListener, ISpellCheckerSessionListener scListener,
int uid, Bundle bundle) {
if (DBG) {
Slog.w(TAG, "Start spell checker session inner locked.");
}
final String sciId = info.getId();
final InternalServiceConnection connection = new InternalServiceConnection(
sciId, locale, scListener, bundle);
final Intent serviceIntent = new Intent(SpellCheckerService.SERVICE_INTERFACE);
serviceIntent.setComponent(info.getComponent());
if (DBG) {
Slog.w(TAG, "bind service: " + info.getId());
}
if (!mContext.bindService(serviceIntent, connection, Context.BIND_AUTO_CREATE)) {
Slog.e(TAG, "Failed to get a spell checker service.");
return;
}
final SpellCheckerBindGroup group = new SpellCheckerBindGroup(
connection, tsListener, locale, scListener, uid, bundle);
mSpellCheckerBindGroups.put(sciId, group);
}
@Override
public SpellCheckerInfo[] getEnabledSpellCheckers() {
if (DBG) {
Slog.d(TAG, "getEnabledSpellCheckers: " + mSpellCheckerList.size());
for (int i = 0; i < mSpellCheckerList.size(); ++i) {
Slog.d(TAG, "EnabledSpellCheckers: " + mSpellCheckerList.get(i).getPackageName());
}
}
return mSpellCheckerList.toArray(new SpellCheckerInfo[mSpellCheckerList.size()]);
}
@Override
public void finishSpellCheckerService(ISpellCheckerSessionListener listener) {
if (DBG) {
Slog.d(TAG, "FinishSpellCheckerService");
}
synchronized(mSpellCheckerMap) {
for (SpellCheckerBindGroup group : mSpellCheckerBindGroups.values()) {
if (group == null) continue;
group.removeListener(listener);
}
}
}
@Override
public void setCurrentSpellChecker(String locale, String sciId) {
synchronized(mSpellCheckerMap) {
if (mContext.checkCallingOrSelfPermission(
android.Manifest.permission.WRITE_SECURE_SETTINGS)
!= PackageManager.PERMISSION_GRANTED) {
throw new SecurityException(
"Requires permission "
+ android.Manifest.permission.WRITE_SECURE_SETTINGS);
}
setCurrentSpellCheckerLocked(sciId);
}
}
@Override
public void setCurrentSpellCheckerSubtype(String locale, int hashCode) {
synchronized(mSpellCheckerMap) {
if (mContext.checkCallingOrSelfPermission(
android.Manifest.permission.WRITE_SECURE_SETTINGS)
!= PackageManager.PERMISSION_GRANTED) {
throw new SecurityException(
"Requires permission "
+ android.Manifest.permission.WRITE_SECURE_SETTINGS);
}
setCurrentSpellCheckerSubtypeLocked(hashCode);
}
}
@Override
public void setSpellCheckerEnabled(boolean enabled) {
synchronized(mSpellCheckerMap) {
if (mContext.checkCallingOrSelfPermission(
android.Manifest.permission.WRITE_SECURE_SETTINGS)
!= PackageManager.PERMISSION_GRANTED) {
throw new SecurityException(
"Requires permission "
+ android.Manifest.permission.WRITE_SECURE_SETTINGS);
}
setSpellCheckerEnabledLocked(enabled);
}
}
private void setCurrentSpellCheckerLocked(String sciId) {
if (DBG) {
Slog.w(TAG, "setCurrentSpellChecker: " + sciId);
}
if (TextUtils.isEmpty(sciId) || !mSpellCheckerMap.containsKey(sciId)) return;
final SpellCheckerInfo currentSci = getCurrentSpellChecker(null);
if (currentSci != null && currentSci.getId().equals(sciId)) {
// Do nothing if the current spell checker is same as new spell checker.
return;
}
final long ident = Binder.clearCallingIdentity();
try {
Settings.Secure.putString(mContext.getContentResolver(),
Settings.Secure.SELECTED_SPELL_CHECKER, sciId);
setCurrentSpellCheckerSubtypeLocked(0);
} finally {
Binder.restoreCallingIdentity(ident);
}
}
private void setCurrentSpellCheckerSubtypeLocked(int hashCode) {
if (DBG) {
Slog.w(TAG, "setCurrentSpellCheckerSubtype: " + hashCode);
}
final SpellCheckerInfo sci = getCurrentSpellChecker(null);
int tempHashCode = 0;
for (int i = 0; sci != null && i < sci.getSubtypeCount(); ++i) {
if(sci.getSubtypeAt(i).hashCode() == hashCode) {
tempHashCode = hashCode;
break;
}
}
final long ident = Binder.clearCallingIdentity();
try {
Settings.Secure.putString(mContext.getContentResolver(),
Settings.Secure.SELECTED_SPELL_CHECKER_SUBTYPE, String.valueOf(tempHashCode));
} finally {
Binder.restoreCallingIdentity(ident);
}
}
private void setSpellCheckerEnabledLocked(boolean enabled) {
if (DBG) {
Slog.w(TAG, "setSpellCheckerEnabled: " + enabled);
}
final long ident = Binder.clearCallingIdentity();
try {
Settings.Secure.putInt(mContext.getContentResolver(),
Settings.Secure.SPELL_CHECKER_ENABLED, enabled ? 1 : 0);
} finally {
Binder.restoreCallingIdentity(ident);
}
}
private boolean isSpellCheckerEnabledLocked() {
final long ident = Binder.clearCallingIdentity();
try {
final boolean retval = Settings.Secure.getInt(mContext.getContentResolver(),
Settings.Secure.SPELL_CHECKER_ENABLED, 1) == 1;
if (DBG) {
Slog.w(TAG, "getSpellCheckerEnabled: " + retval);
}
return retval;
} finally {
Binder.restoreCallingIdentity(ident);
}
}
// SpellCheckerBindGroup contains active text service session listeners.
// If there are no listeners anymore, the SpellCheckerBindGroup instance will be removed from
// mSpellCheckerBindGroups
private class SpellCheckerBindGroup {
private final String TAG = SpellCheckerBindGroup.class.getSimpleName();
private final InternalServiceConnection mInternalConnection;
private final ArrayList<InternalDeathRecipient> mListeners =
new ArrayList<InternalDeathRecipient>();
public ISpellCheckerService mSpellChecker;
public boolean mConnected;
public SpellCheckerBindGroup(InternalServiceConnection connection,
ITextServicesSessionListener listener, String locale,
ISpellCheckerSessionListener scListener, int uid, Bundle bundle) {
mInternalConnection = connection;
mConnected = false;
addListener(listener, locale, scListener, uid, bundle);
}
public void onServiceConnected(ISpellCheckerService spellChecker) {
if (DBG) {
Slog.d(TAG, "onServiceConnected");
}
synchronized(mSpellCheckerMap) {
for (InternalDeathRecipient listener : mListeners) {
try {
final ISpellCheckerSession session = spellChecker.getISpellCheckerSession(
listener.mScLocale, listener.mScListener, listener.mBundle);
listener.mTsListener.onServiceConnected(session);
} catch (RemoteException e) {
Slog.e(TAG, "Exception in getting the spell checker session: " + e);
removeAll();
return;
}
}
mSpellChecker = spellChecker;
mConnected = true;
}
}
public InternalDeathRecipient addListener(ITextServicesSessionListener tsListener,
String locale, ISpellCheckerSessionListener scListener, int uid, Bundle bundle) {
if (DBG) {
Slog.d(TAG, "addListener: " + locale);
}
InternalDeathRecipient recipient = null;
synchronized(mSpellCheckerMap) {
try {
final int size = mListeners.size();
for (int i = 0; i < size; ++i) {
if (mListeners.get(i).hasSpellCheckerListener(scListener)) {
// do not add the lister if the group already contains this.
return null;
}
}
recipient = new InternalDeathRecipient(
this, tsListener, locale, scListener, uid, bundle);
scListener.asBinder().linkToDeath(recipient, 0);
mListeners.add(recipient);
} catch(RemoteException e) {
// do nothing
}
cleanLocked();
}
return recipient;
}
public void removeListener(ISpellCheckerSessionListener listener) {
if (DBG) {
Slog.w(TAG, "remove listener: " + listener.hashCode());
}
synchronized(mSpellCheckerMap) {
final int size = mListeners.size();
final ArrayList<InternalDeathRecipient> removeList =
new ArrayList<InternalDeathRecipient>();
for (int i = 0; i < size; ++i) {
final InternalDeathRecipient tempRecipient = mListeners.get(i);
if(tempRecipient.hasSpellCheckerListener(listener)) {
if (DBG) {
Slog.w(TAG, "found existing listener.");
}
removeList.add(tempRecipient);
}
}
final int removeSize = removeList.size();
for (int i = 0; i < removeSize; ++i) {
if (DBG) {
Slog.w(TAG, "Remove " + removeList.get(i));
}
mListeners.remove(removeList.get(i));
}
cleanLocked();
}
}
private void cleanLocked() {
if (DBG) {
Slog.d(TAG, "cleanLocked");
}
if (mListeners.isEmpty()) {
if (mSpellCheckerBindGroups.containsKey(this)) {
mSpellCheckerBindGroups.remove(this);
}
// Unbind service when there is no active clients.
mContext.unbindService(mInternalConnection);
}
}
public void removeAll() {
Slog.e(TAG, "Remove the spell checker bind unexpectedly.");
synchronized(mSpellCheckerMap) {
mListeners.clear();
cleanLocked();
}
}
}
private class InternalServiceConnection implements ServiceConnection {
private final ISpellCheckerSessionListener mListener;
private final String mSciId;
private final String mLocale;
private final Bundle mBundle;
public InternalServiceConnection(
String id, String locale, ISpellCheckerSessionListener listener, Bundle bundle) {
mSciId = id;
mLocale = locale;
mListener = listener;
mBundle = bundle;
}
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
synchronized(mSpellCheckerMap) {
if (DBG) {
Slog.w(TAG, "onServiceConnected: " + name);
}
ISpellCheckerService spellChecker = ISpellCheckerService.Stub.asInterface(service);
final SpellCheckerBindGroup group = mSpellCheckerBindGroups.get(mSciId);
if (group != null) {
group.onServiceConnected(spellChecker);
}
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
mSpellCheckerBindGroups.remove(mSciId);
}
}
private class InternalDeathRecipient implements IBinder.DeathRecipient {
public final ITextServicesSessionListener mTsListener;
public final ISpellCheckerSessionListener mScListener;
public final String mScLocale;
private final SpellCheckerBindGroup mGroup;
public final int mUid;
public final Bundle mBundle;
public InternalDeathRecipient(SpellCheckerBindGroup group,
ITextServicesSessionListener tsListener, String scLocale,
ISpellCheckerSessionListener scListener, int uid, Bundle bundle) {
mTsListener = tsListener;
mScListener = scListener;
mScLocale = scLocale;
mGroup = group;
mUid = uid;
mBundle = bundle;
}
public boolean hasSpellCheckerListener(ISpellCheckerSessionListener listener) {
return listener.asBinder().equals(mScListener.asBinder());
}
@Override
public void binderDied() {
mGroup.removeListener(mScListener);
}
}
}
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