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/*
* Copyright (C) 2016 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.text;
import android.icu.lang.UCharacter;
import android.icu.lang.UProperty;
/**
* An utility class for Emoji.
* @hide
*/
public class Emoji {
public static int COMBINING_ENCLOSING_KEYCAP = 0x20E3;
public static int ZERO_WIDTH_JOINER = 0x200D;
public static int VARIATION_SELECTOR_16 = 0xFE0F;
public static int CANCEL_TAG = 0xE007F;
/**
* Returns true if the given code point is regional indicator symbol.
*/
public static boolean isRegionalIndicatorSymbol(int codePoint) {
return 0x1F1E6 <= codePoint && codePoint <= 0x1F1FF;
}
/**
* Returns true if the given code point is emoji modifier.
*/
public static boolean isEmojiModifier(int codePoint) {
return UCharacter.hasBinaryProperty(codePoint, UProperty.EMOJI_MODIFIER);
}
//
/**
* Returns true if the given code point is emoji modifier base.
* @param c codepoint to check
* @return true if is emoji modifier base
*/
public static boolean isEmojiModifierBase(int c) {
// These two characters were removed from Emoji_Modifier_Base in Emoji 4.0, but we need to
// keep them as emoji modifier bases since there are fonts and user-generated text out there
// that treats these as potential emoji bases.
if (c == 0x1F91D || c == 0x1F93C) {
return true;
}
// Emoji Modifier Base characters new in Unicode emoji 11
// From https://www.unicode.org/Public/emoji/11.0/emoji-data.txt
// TODO: Remove once emoji-data.text 11 is in ICU or update to 11.
if ((0x1F9B5 <= c && c <= 0x1F9B6) || (0x1F9B8 <= c && c <= 0x1F9B9)) {
return true;
}
return UCharacter.hasBinaryProperty(c, UProperty.EMOJI_MODIFIER_BASE);
}
/**
* Returns true if the character is a new emoji still not supported in our version of ICU.
*/
public static boolean isNewEmoji(int c) {
// Emoji characters new in Unicode emoji 12
// From https://www.unicode.org/Public/emoji/12.0/emoji-data.txt
// TODO: Remove once emoji-data.text 12 is in ICU or update to 12.
if (c < 0x1F6D5 || c > 0x1FA95) {
// Optimization for characters outside the new emoji range.
return false;
}
return c == 0x1F6D5 || c == 0x1F6FA || c == 0x1F93F || c == 0x1F971 || c == 0x1F97B
|| (0x1F7E0 <= c && c <= 0x1F7EB) || (0x1F90D <= c && c <= 0x1F90F)
|| (0x1F9A5 <= c && c <= 0x1F9AA) || (0x1F9AE <= c && c <= 0x1F9AF)
|| (0x1F9BA <= c && c <= 0x1F9BF) || (0x1F9C3 <= c && c <= 0x1F9CA)
|| (0x1F9CD <= c && c <= 0x1F9CF) || (0x1FA70 <= c && c <= 0x1FA73)
|| (0x1FA78 <= c && c <= 0x1FA7A) || (0x1FA80 <= c && c <= 0x1FA82)
|| (0x1FA90 <= c && c <= 0x1FA95);
}
/**
* Returns true if the character has Emoji property.
*/
public static boolean isEmoji(int codePoint) {
return isNewEmoji(codePoint) || UCharacter.hasBinaryProperty(codePoint, UProperty.EMOJI);
}
// Returns true if the character can be a base character of COMBINING ENCLOSING KEYCAP.
public static boolean isKeycapBase(int codePoint) {
return ('0' <= codePoint && codePoint <= '9') || codePoint == '#' || codePoint == '*';
}
/**
* Returns true if the character can be a part of tag_spec in emoji tag sequence.
*
* Note that 0xE007F (CANCEL TAG) is not included.
*/
public static boolean isTagSpecChar(int codePoint) {
return 0xE0020 <= codePoint && codePoint <= 0xE007E;
}
}
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