39 lines
1.5 KiB
Java
39 lines
1.5 KiB
Java
/*
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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.inputmethod.latin.common;
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/**
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* Emojis are supplementary characters expressed as a low+high pair. For instance,
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* the emoji U+1F625 is encoded as "\uD83D\uDE25" in UTF-16, where '\uD83D' is in
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* the range of [0xd800, 0xdbff] and '\uDE25' is in the range of [0xdc00, 0xdfff].
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* {@see http://docs.oracle.com/javase/6/docs/api/java/lang/Character.html#unicode}
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*/
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public final class UnicodeSurrogate {
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private static final char LOW_SURROGATE_MIN = '\uD800';
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private static final char LOW_SURROGATE_MAX = '\uDBFF';
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private static final char HIGH_SURROGATE_MIN = '\uDC00';
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private static final char HIGH_SURROGATE_MAX = '\uDFFF';
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public static boolean isLowSurrogate(final char c) {
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return c >= LOW_SURROGATE_MIN && c <= LOW_SURROGATE_MAX;
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}
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public static boolean isHighSurrogate(final char c) {
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return c >= HIGH_SURROGATE_MIN && c <= HIGH_SURROGATE_MAX;
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}
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}
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