/*
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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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#include "minikin/Emoji.h"
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namespace minikin {
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bool isNewEmoji(uint32_t c) {
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// Emoji characters new in Unicode emoji 12
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// From https://www.unicode.org/Public/emoji/12.0/emoji-data.txt
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// TODO: Remove once emoji-data.text 12 is in ICU or update to 12.
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if (c < 0x1F6D5 || c > 0x1FA95) {
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// Optimization for characters outside the new emoji range.
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return false;
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}
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return c == 0x1F6D5 || c == 0x1F6FA || c == 0x1F93F || c == 0x1F971 || c == 0x1F97B ||
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(0x1F7E0 <= c && c <= 0x1F7EB) || (0x1F90D <= c && c <= 0x1F90F) ||
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(0x1F9A5 <= c && c <= 0x1F9AA) || (0x1F9AE <= c && c <= 0x1F9AF) ||
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(0x1F9BA <= c && c <= 0x1F9BF) || (0x1F9C3 <= c && c <= 0x1F9CA) ||
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(0x1F9CD <= c && c <= 0x1F9CF) || (0x1FA70 <= c && c <= 0x1FA73) ||
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(0x1FA78 <= c && c <= 0x1FA7A) || (0x1FA80 <= c && c <= 0x1FA82) ||
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(0x1FA90 <= c && c <= 0x1FA95);
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}
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bool isEmoji(uint32_t c) {
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return isNewEmoji(c) || u_hasBinaryProperty(c, UCHAR_EMOJI);
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}
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bool isEmojiModifier(uint32_t c) {
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// Emoji modifier are not expected to change, so there's a small change we need to customize
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// this.
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return u_hasBinaryProperty(c, UCHAR_EMOJI_MODIFIER);
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}
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bool isEmojiBase(uint32_t c) {
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// These two characters were removed from Emoji_Modifier_Base in Emoji 4.0, but we need to keep
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// them as emoji modifier bases since there are fonts and user-generated text out there that
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// treats these as potential emoji bases.
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if (c == 0x1F91D || c == 0x1F93C) {
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return true;
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}
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// Emoji Modifier Base characters new in Unicode emoji 11
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// From https://www.unicode.org/Public/emoji/11.0/emoji-data.txt
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// TODO: Remove once emoji-data.text 11 is in ICU or update to 11.
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if ((0x1F9B5 <= c && c <= 0x1F9B6) || (0x1F9B8 <= c && c <= 0x1F9B9)) {
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return true;
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}
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return u_hasBinaryProperty(c, UCHAR_EMOJI_MODIFIER_BASE);
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}
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UCharDirection emojiBidiOverride(const void* /* context */, UChar32 c) {
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if (isNewEmoji(c)) {
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// All new emoji characters in Unicode 10.0 are of the bidi class ON.
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return U_OTHER_NEUTRAL;
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} else {
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return u_charDirection(c);
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}
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}
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} // namespace minikin
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