Remove multi-client IME (34091a50) · Commits · e / os / android_frameworks_base

core/java/android/inputmethodservice/MultiClientInputMethodClientCallbackAdaptor.java

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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 android.inputmethodservice;

		import android.annotation.Nullable;
		import android.annotation.WorkerThread;
		import android.graphics.Rect;
		import android.os.Bundle;
		import android.os.Debug;
		import android.os.Handler;
		import android.os.Looper;
		import android.os.RemoteException;
		import android.os.ResultReceiver;
		import android.util.Log;
		import android.view.InputChannel;
		import android.view.InputDevice;
		import android.view.InputEvent;
		import android.view.InputEventReceiver;
		import android.view.KeyEvent;
		import android.view.MotionEvent;
		import android.view.WindowManager.LayoutParams.SoftInputModeFlags;
		import android.view.inputmethod.CompletionInfo;
		import android.view.inputmethod.CursorAnchorInfo;
		import android.view.inputmethod.EditorInfo;
		import android.view.inputmethod.ExtractedText;

		import com.android.internal.annotations.GuardedBy;
		import com.android.internal.inputmethod.CancellationGroup;
		import com.android.internal.inputmethod.IMultiClientInputMethodSession;
		import com.android.internal.os.SomeArgs;
		import com.android.internal.util.function.pooled.PooledLambda;
		import com.android.internal.view.IInputContext;
		import com.android.internal.view.IInputMethodSession;
		import com.android.internal.view.InputConnectionWrapper;

		import java.lang.ref.WeakReference;

		/**
		* Re-dispatches all the incoming per-client events to the specified {@link Looper} thread.
		*
		* <p>There are three types of per-client callbacks.</p>
		*
		* <ul>
		* <li>{@link IInputMethodSession} - from the IME client</li>
		* <li>{@link IMultiClientInputMethodSession} - from MultiClientInputMethodManagerService</li>
		* <li>{@link InputChannel} - from the IME client</li>
		* </ul>
		*
		* <p>This class serializes all the incoming events among those channels onto
		* {@link MultiClientInputMethodServiceDelegate.ClientCallback} on the specified {@link Looper}
		* thread.</p>
		*/
		final class MultiClientInputMethodClientCallbackAdaptor {
		static final boolean DEBUG = false;
		static final String TAG = MultiClientInputMethodClientCallbackAdaptor.class.getSimpleName();

		private final Object mSessionLock = new Object();
		@GuardedBy("mSessionLock")
		CallbackImpl mCallbackImpl;
		@GuardedBy("mSessionLock")
		InputChannel mReadChannel;
		@GuardedBy("mSessionLock")
		KeyEvent.DispatcherState mDispatcherState;
		@GuardedBy("mSessionLock")
		Handler mHandler;
		@GuardedBy("mSessionLock")
		@Nullable
		InputEventReceiver mInputEventReceiver;

		private final CancellationGroup mCancellationGroup = new CancellationGroup();

		IInputMethodSession.Stub createIInputMethodSession() {
		synchronized (mSessionLock) {
		return new InputMethodSessionImpl(
		mSessionLock, mCallbackImpl, mHandler, mCancellationGroup);
		}
		}

		IMultiClientInputMethodSession.Stub createIMultiClientInputMethodSession() {
		synchronized (mSessionLock) {
		return new MultiClientInputMethodSessionImpl(
		mSessionLock, mCallbackImpl, mHandler, mCancellationGroup);
		}
		}

		MultiClientInputMethodClientCallbackAdaptor(
		MultiClientInputMethodServiceDelegate.ClientCallback clientCallback, Looper looper,
		KeyEvent.DispatcherState dispatcherState, InputChannel readChannel) {
		synchronized (mSessionLock) {
		mCallbackImpl = new CallbackImpl(this, clientCallback);
		mDispatcherState = dispatcherState;
		mHandler = new Handler(looper, null, true);
		mReadChannel = readChannel;
		mInputEventReceiver = new ImeInputEventReceiver(mReadChannel, mHandler.getLooper(),
		mCancellationGroup, mDispatcherState, mCallbackImpl.mOriginalCallback);
		}
		}

		private static final class KeyEventCallbackAdaptor implements KeyEvent.Callback {
		private final MultiClientInputMethodServiceDelegate.ClientCallback mLocalCallback;

		KeyEventCallbackAdaptor(
		MultiClientInputMethodServiceDelegate.ClientCallback callback) {
		mLocalCallback = callback;
		}

		@Override
		public boolean onKeyDown(int keyCode, KeyEvent event) {
		return mLocalCallback.onKeyDown(keyCode, event);
		}

		@Override
		public boolean onKeyLongPress(int keyCode, KeyEvent event) {
		return mLocalCallback.onKeyLongPress(keyCode, event);
		}

		@Override
		public boolean onKeyUp(int keyCode, KeyEvent event) {
		return mLocalCallback.onKeyUp(keyCode, event);
		}

		@Override
		public boolean onKeyMultiple(int keyCode, int count, KeyEvent event) {
		return mLocalCallback.onKeyMultiple(keyCode, event);
		}
		}

		private static final class ImeInputEventReceiver extends InputEventReceiver {
		private final CancellationGroup mCancellationGroupOnFinishSession;
		private final KeyEvent.DispatcherState mDispatcherState;
		private final MultiClientInputMethodServiceDelegate.ClientCallback mClientCallback;
		private final KeyEventCallbackAdaptor mKeyEventCallbackAdaptor;

		ImeInputEventReceiver(InputChannel readChannel, Looper looper,
		CancellationGroup cancellationGroupOnFinishSession,
		KeyEvent.DispatcherState dispatcherState,
		MultiClientInputMethodServiceDelegate.ClientCallback callback) {
		super(readChannel, looper);
		mCancellationGroupOnFinishSession = cancellationGroupOnFinishSession;
		mDispatcherState = dispatcherState;
		mClientCallback = callback;
		mKeyEventCallbackAdaptor = new KeyEventCallbackAdaptor(callback);
		}

		@Override
		public void onInputEvent(InputEvent event) {
		if (mCancellationGroupOnFinishSession.isCanceled()) {
		// The session has been finished.
		finishInputEvent(event, false);
		return;
		}
		boolean handled = false;
		try {
		if (event instanceof KeyEvent) {
		final KeyEvent keyEvent = (KeyEvent) event;
		handled = keyEvent.dispatch(mKeyEventCallbackAdaptor, mDispatcherState,
		mKeyEventCallbackAdaptor);
		} else {
		final MotionEvent motionEvent = (MotionEvent) event;
		if (motionEvent.isFromSource(InputDevice.SOURCE_CLASS_TRACKBALL)) {
		handled = mClientCallback.onTrackballEvent(motionEvent);
		} else {
		handled = mClientCallback.onGenericMotionEvent(motionEvent);
		}
		}
		} finally {
		finishInputEvent(event, handled);
		}
		}
		}

		private static final class InputMethodSessionImpl extends IInputMethodSession.Stub {
		private final Object mSessionLock;
		@GuardedBy("mSessionLock")
		private CallbackImpl mCallbackImpl;
		@GuardedBy("mSessionLock")
		private Handler mHandler;
		private final CancellationGroup mCancellationGroupOnFinishSession;

		InputMethodSessionImpl(Object lock, CallbackImpl callback, Handler handler,
		CancellationGroup cancellationGroupOnFinishSession) {
		mSessionLock = lock;
		mCallbackImpl = callback;
		mHandler = handler;
		mCancellationGroupOnFinishSession = cancellationGroupOnFinishSession;
		}

		@Override
		public void updateExtractedText(int token, ExtractedText text) {
		reportNotSupported();
		}

		@Override
		public void updateSelection(int oldSelStart, int oldSelEnd,
		int newSelStart, int newSelEnd,
		int candidatesStart, int candidatesEnd) {
		synchronized (mSessionLock) {
		if (mCallbackImpl == null \|\| mHandler == null) {
		return;
		}
		final SomeArgs args = SomeArgs.obtain();
		args.argi1 = oldSelStart;
		args.argi2 = oldSelEnd;
		args.argi3 = newSelStart;
		args.argi4 = newSelEnd;
		args.argi5 = candidatesStart;
		args.argi6 = candidatesEnd;
		mHandler.sendMessage(PooledLambda.obtainMessage(
		CallbackImpl::updateSelection, mCallbackImpl, args));
		}
		}

		@Override
		public void viewClicked(boolean focusChanged) {
		reportNotSupported();
		}

		@Override
		public void updateCursor(Rect newCursor) {
		reportNotSupported();
		}

		@Override
		public void displayCompletions(CompletionInfo[] completions) {
		synchronized (mSessionLock) {
		if (mCallbackImpl == null \|\| mHandler == null) {
		return;
		}
		mHandler.sendMessage(PooledLambda.obtainMessage(
		CallbackImpl::displayCompletions, mCallbackImpl, completions));
		}
		}

		@Override
		public void appPrivateCommand(String action, Bundle data) {
		synchronized (mSessionLock) {
		if (mCallbackImpl == null \|\| mHandler == null) {
		return;
		}
		mHandler.sendMessage(PooledLambda.obtainMessage(
		CallbackImpl::appPrivateCommand, mCallbackImpl, action, data));
		}
		}

		@Override
		public void finishSession() {
		synchronized (mSessionLock) {
		if (mCallbackImpl == null \|\| mHandler == null) {
		return;
		}
		mCancellationGroupOnFinishSession.cancelAll();
		mHandler.sendMessage(PooledLambda.obtainMessage(
		CallbackImpl::finishSession, mCallbackImpl));
		mCallbackImpl = null;
		mHandler = null;
		}
		}

		@Override
		public void updateCursorAnchorInfo(CursorAnchorInfo info) {
		synchronized (mSessionLock) {
		if (mCallbackImpl == null \|\| mHandler == null) {
		return;
		}
		mHandler.sendMessage(PooledLambda.obtainMessage(
		CallbackImpl::updateCursorAnchorInfo, mCallbackImpl, info));
		}
		}

		@Override
		public final void notifyImeHidden() {
		// no-op for multi-session since IME is responsible controlling navigation bar buttons.
		reportNotSupported();
		}

		@Override
		public void removeImeSurface() {
		// no-op for multi-session
		reportNotSupported();
		}

		@Override
		public void finishInput() throws RemoteException {
		// no-op for multi-session
		reportNotSupported();
		}
		}

		private static final class MultiClientInputMethodSessionImpl
		extends IMultiClientInputMethodSession.Stub {
		private final Object mSessionLock;
		@GuardedBy("mSessionLock")
		private CallbackImpl mCallbackImpl;
		@GuardedBy("mSessionLock")
		private Handler mHandler;
		private final CancellationGroup mCancellationGroupOnFinishSession;

		MultiClientInputMethodSessionImpl(Object lock, CallbackImpl callback,
		Handler handler, CancellationGroup cancellationGroupOnFinishSession) {
		mSessionLock = lock;
		mCallbackImpl = callback;
		mHandler = handler;
		mCancellationGroupOnFinishSession = cancellationGroupOnFinishSession;
		}

		@Override
		public void startInputOrWindowGainedFocus(@Nullable IInputContext inputContext,
		int missingMethods, @Nullable EditorInfo editorInfo, int controlFlags,
		@SoftInputModeFlags int softInputMode, int windowHandle) {
		synchronized (mSessionLock) {
		if (mCallbackImpl == null \|\| mHandler == null) {
		return;
		}
		final SomeArgs args = SomeArgs.obtain();
		// TODO(Bug 119211536): Remove dependency on AbstractInputMethodService from ICW
		final WeakReference<AbstractInputMethodService> fakeIMS =
		new WeakReference<>(null);
		args.arg1 = (inputContext == null) ? null
		: new InputConnectionWrapper(fakeIMS, inputContext, missingMethods,
		mCancellationGroupOnFinishSession);
		args.arg2 = editorInfo;
		args.argi1 = controlFlags;
		args.argi2 = softInputMode;
		args.argi3 = windowHandle;
		mHandler.sendMessage(PooledLambda.obtainMessage(
		CallbackImpl::startInputOrWindowGainedFocus, mCallbackImpl, args));
		}
		}

		@Override
		public void showSoftInput(int flags, ResultReceiver resultReceiver) {
		synchronized (mSessionLock) {
		if (mCallbackImpl == null \|\| mHandler == null) {
		return;
		}
		mHandler.sendMessage(PooledLambda.obtainMessage(
		CallbackImpl::showSoftInput, mCallbackImpl, flags,
		resultReceiver));
		}
		}

		@Override
		public void hideSoftInput(int flags, ResultReceiver resultReceiver) {
		synchronized (mSessionLock) {
		if (mCallbackImpl == null \|\| mHandler == null) {
		return;
		}
		mHandler.sendMessage(PooledLambda.obtainMessage(
		CallbackImpl::hideSoftInput, mCallbackImpl, flags,
		resultReceiver));
		}
		}
		}

		/**
		* The maim part of adaptor to {@link MultiClientInputMethodServiceDelegate.ClientCallback}.
		*/
		@WorkerThread
		private static final class CallbackImpl {
		private final MultiClientInputMethodClientCallbackAdaptor mCallbackAdaptor;
		private final MultiClientInputMethodServiceDelegate.ClientCallback mOriginalCallback;
		private boolean mFinished = false;

		CallbackImpl(MultiClientInputMethodClientCallbackAdaptor callbackAdaptor,
		MultiClientInputMethodServiceDelegate.ClientCallback callback) {
		mCallbackAdaptor = callbackAdaptor;
		mOriginalCallback = callback;
		}

		void updateSelection(SomeArgs args) {
		try {
		if (mFinished) {
		return;
		}
		mOriginalCallback.onUpdateSelection(args.argi1, args.argi2, args.argi3,
		args.argi4, args.argi5, args.argi6);
		} finally {
		args.recycle();
		}
		}

		void displayCompletions(CompletionInfo[] completions) {
		if (mFinished) {
		return;
		}
		mOriginalCallback.onDisplayCompletions(completions);
		}

		void appPrivateCommand(String action, Bundle data) {
		if (mFinished) {
		return;
		}
		mOriginalCallback.onAppPrivateCommand(action, data);
		}

		void finishSession() {
		if (mFinished) {
		return;
		}
		mFinished = true;
		mOriginalCallback.onFinishSession();
		synchronized (mCallbackAdaptor.mSessionLock) {
		mCallbackAdaptor.mDispatcherState = null;
		if (mCallbackAdaptor.mReadChannel != null) {
		mCallbackAdaptor.mReadChannel.dispose();
		mCallbackAdaptor.mReadChannel = null;
		}
		mCallbackAdaptor.mInputEventReceiver = null;
		}
		}

		void updateCursorAnchorInfo(CursorAnchorInfo info) {
		if (mFinished) {
		return;
		}
		mOriginalCallback.onUpdateCursorAnchorInfo(info);
		}

		void startInputOrWindowGainedFocus(SomeArgs args) {
		try {
		if (mFinished) {
		return;
		}
		final InputConnectionWrapper inputConnection = (InputConnectionWrapper) args.arg1;
		final EditorInfo editorInfo = (EditorInfo) args.arg2;
		final int startInputFlags = args.argi1;
		final int softInputMode = args.argi2;
		final int windowHandle = args.argi3;
		mOriginalCallback.onStartInputOrWindowGainedFocus(inputConnection, editorInfo,
		startInputFlags, softInputMode, windowHandle);
		} finally {
		args.recycle();
		}
		}

		void showSoftInput(int flags, ResultReceiver resultReceiver) {
		if (mFinished) {
		return;
		}
		mOriginalCallback.onShowSoftInput(flags, resultReceiver);
		}

		void hideSoftInput(int flags, ResultReceiver resultReceiver) {
		if (mFinished) {
		return;
		}
		mOriginalCallback.onHideSoftInput(flags, resultReceiver);
		}
		}

		private static void reportNotSupported() {
		if (DEBUG) {
		Log.d(TAG, Debug.getCaller() + " is not supported");
		}
		}
		}

core/java/android/inputmethodservice/MultiClientInputMethodServiceDelegate.java

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core/java/android/inputmethodservice/MultiClientInputMethodServiceDelegateImpl.java

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core/java/com/android/internal/inputmethod/IMultiClientInputMethod.aidl

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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.internal.inputmethod;

		import android.os.IBinder;
		import com.android.internal.inputmethod.IMultiClientInputMethodPrivilegedOperations;

		oneway interface IMultiClientInputMethod {
		void initialize(in IMultiClientInputMethodPrivilegedOperations privOps);
		void addClient(int clientId, int uid, int pid, int selfReportedDisplayId);
		void removeClient(int clientId);
		}

core/java/com/android/internal/inputmethod/IMultiClientInputMethodPrivilegedOperations.aidl

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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.internal.inputmethod;

		import android.view.InputChannel;
		import com.android.internal.view.IInputMethodSession;
		import com.android.internal.inputmethod.IMultiClientInputMethodSession;

		/**
		* Defines priviledged operations that only the current MSIMS is allowed to call.
		* Actual operations are implemented and handled by MultiClientInputMethodManagerService.
		*/
		interface IMultiClientInputMethodPrivilegedOperations {
		IBinder createInputMethodWindowToken(int displayId);
		void deleteInputMethodWindowToken(IBinder token);
		void acceptClient(int clientId, in IInputMethodSession session,
		in IMultiClientInputMethodSession multiClientSession, in InputChannel writeChannel);
		void reportImeWindowTarget(int clientId, int targetWindowHandle, in IBinder imeWindowToken);
		boolean isUidAllowedOnDisplay(int displayId, int uid);
		void setActive(int clientId, boolean active);
		}