/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.inputmethod;
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import android.annotation.NonNull;
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import android.annotation.UserIdInt;
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import android.view.inputmethod.InputMethodInfo;
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import com.android.server.LocalServices;
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import java.util.Collections;
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import java.util.List;
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/**
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* Input method manager local system service interface.
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*/
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public abstract class InputMethodManagerInternal {
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/**
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* Called by the power manager to tell the input method manager whether it
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* should start watching for wake events.
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*/
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public abstract void setInteractive(boolean interactive);
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/**
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* Hides the current input method, if visible.
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*/
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public abstract void hideCurrentInputMethod();
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/**
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* Returns the list of installed input methods for the specified user.
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*
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* @param userId The user ID to be queried.
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* @return A list of {@link InputMethodInfo}. VR-only IMEs are already excluded.
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*/
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public abstract List<InputMethodInfo> getInputMethodListAsUser(@UserIdInt int userId);
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/**
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* Returns the list of installed input methods that are enabled for the specified user.
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*
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* @param userId The user ID to be queried.
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* @return A list of {@link InputMethodInfo} that are enabled for {@code userId}.
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*/
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public abstract List<InputMethodInfo> getEnabledInputMethodListAsUser(@UserIdInt int userId);
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/**
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* Fake implementation of {@link InputMethodManagerInternal}. All the methods do nothing.
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*/
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private static final InputMethodManagerInternal NOP =
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new InputMethodManagerInternal() {
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@Override
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public void setInteractive(boolean interactive) {
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}
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@Override
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public void hideCurrentInputMethod() {
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}
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@Override
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public List<InputMethodInfo> getInputMethodListAsUser(int userId) {
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return Collections.emptyList();
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}
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@Override
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public List<InputMethodInfo> getEnabledInputMethodListAsUser(int userId) {
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return Collections.emptyList();
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}
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};
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/**
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* @return Global instance if exists. Otherwise, a dummy no-op instance.
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*/
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@NonNull
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public static InputMethodManagerInternal get() {
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final InputMethodManagerInternal instance =
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LocalServices.getService(InputMethodManagerInternal.class);
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return instance != null ? instance : NOP;
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}
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}
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