am 7c2f53ab: am 413aded6: Add a compatibility library for newly added methods in L
* commit '7c2f53ab53053cd3857b90e1d1cf9cddc8b67a89': Add a compatibility library for newly added methods in Lmain
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/*
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* Copyright (C) 2014 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.inputmethod.compat;
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import android.view.inputmethod.InputConnection;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Method;
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public final class InputConnectionCompatUtils {
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// Note that CursorAnchorInfoRequest is supposed to be available in API level 21 and later.
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private static Class<?> getCursorAnchorInfoRequestClass() {
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try {
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return Class.forName("android.view.inputmethod.CursorAnchorInfoRequest");
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} catch (ClassNotFoundException e) {
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return null;
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}
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}
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private static final Class<?> TYPE_CursorAnchorInfoRequest;
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private static final Constructor<?> CONSTRUCTOR_CursorAnchorInfoRequest;
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private static final Method METHOD_requestCursorAnchorInfo;
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static {
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TYPE_CursorAnchorInfoRequest = getCursorAnchorInfoRequestClass();
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CONSTRUCTOR_CursorAnchorInfoRequest = CompatUtils.getConstructor(
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TYPE_CursorAnchorInfoRequest, int.class, int.class);
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METHOD_requestCursorAnchorInfo = CompatUtils.getMethod(InputConnection.class,
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"requestCursorAnchorInfo", TYPE_CursorAnchorInfoRequest);
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}
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public static boolean isRequestCursorAnchorInfoAvailable() {
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return METHOD_requestCursorAnchorInfo != null &&
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CONSTRUCTOR_CursorAnchorInfoRequest != null;
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}
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/**
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* A local copy of CursorAnchorInfoRequest.RESULT_NOT_HANDLED until the SDK becomes publicly
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* available.
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*/
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private final static int CURSOR_ANCHOR_INFO_REQUEST_RESULT_NOT_HANDLED = 0;
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public static int requestCursorAnchorInfo(final InputConnection inputConnection,
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final int type, final int flags) {
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if (!isRequestCursorAnchorInfoAvailable()) {
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return CURSOR_ANCHOR_INFO_REQUEST_RESULT_NOT_HANDLED;
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}
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final Object requestObject = CompatUtils.newInstance(
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CONSTRUCTOR_CursorAnchorInfoRequest, type, flags);
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if (requestObject == null) {
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return CURSOR_ANCHOR_INFO_REQUEST_RESULT_NOT_HANDLED;
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}
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return (Integer) CompatUtils.invoke(inputConnection,
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CURSOR_ANCHOR_INFO_REQUEST_RESULT_NOT_HANDLED /* defaultValue */,
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METHOD_requestCursorAnchorInfo, requestObject);
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}
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}
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