68 lines
2.8 KiB
Java
68 lines
2.8 KiB
Java
/*
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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.textservice.TextInfo;
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import com.android.inputmethod.annotations.UsedForTesting;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Method;
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@UsedForTesting
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public final class TextInfoCompatUtils {
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// Note that TextInfo.getCharSequence() is supposed to be available in API level 21 and later.
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private static final Method TEXT_INFO_GET_CHAR_SEQUENCE =
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CompatUtils.getMethod(TextInfo.class, "getCharSequence");
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private static final Constructor<?> TEXT_INFO_CONSTRUCTOR_FOR_CHAR_SEQUENCE =
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CompatUtils.getConstructor(TextInfo.class, CharSequence.class, int.class, int.class,
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int.class, int.class);
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@UsedForTesting
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public static boolean isCharSequenceSupported() {
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return TEXT_INFO_GET_CHAR_SEQUENCE != null &&
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TEXT_INFO_CONSTRUCTOR_FOR_CHAR_SEQUENCE != null;
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}
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@UsedForTesting
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public static TextInfo newInstance(CharSequence charSequence, int start, int end, int cookie,
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int sequenceNumber) {
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if (TEXT_INFO_CONSTRUCTOR_FOR_CHAR_SEQUENCE != null) {
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return (TextInfo) CompatUtils.newInstance(TEXT_INFO_CONSTRUCTOR_FOR_CHAR_SEQUENCE,
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charSequence, start, end, cookie, sequenceNumber);
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}
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return new TextInfo(charSequence.subSequence(start, end).toString(), cookie,
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sequenceNumber);
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}
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/**
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* Returns the result of {@link TextInfo#getCharSequence()} when available. Otherwise returns
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* the result of {@link TextInfo#getText()} as fall back.
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* @param textInfo the instance for which {@link TextInfo#getCharSequence()} or
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* {@link TextInfo#getText()} is called.
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* @return the result of {@link TextInfo#getCharSequence()} when available. Otherwise returns
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* the result of {@link TextInfo#getText()} as fall back. If {@code textInfo} is {@code null},
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* returns {@code null}.
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*/
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@UsedForTesting
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public static CharSequence getCharSequenceOrString(final TextInfo textInfo) {
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final CharSequence defaultValue = (textInfo == null ? null : textInfo.getText());
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return (CharSequence) CompatUtils.invoke(textInfo, defaultValue,
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TEXT_INFO_GET_CHAR_SEQUENCE);
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}
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}
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