| /* |
| * Copyright (C) 2014 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. |
| */ |
| |
| #include <minikin/Emoji.h> |
| |
| namespace minikin { |
| |
| bool isNewEmoji(uint32_t c) { |
| // Emoji characters new in Unicode emoji 5.0. |
| // From http://www.unicode.org/Public/emoji/5.0/emoji-data.txt |
| // TODO: Remove once emoji-data.text 5.0 is in ICU or update to 6.0. |
| if (c < 0x1F6F7 || c > 0x1F9E6) { |
| // Optimization for characters outside the new emoji range. |
| return false; |
| } |
| return (0x1F6F7 <= c && c <= 0x1F6F8) |
| || c == 0x1F91F |
| || (0x1F928 <= c && c <= 0x1F92F) |
| || (0x1F931 <= c && c <= 0x1F932) |
| || c == 0x1F94C |
| || (0x1F95F <= c && c <= 0x1F96B) |
| || (0x1F992 <= c && c <= 0x1F997) |
| || (0x1F9D0 <= c && c <= 0x1F9E6); |
| } |
| |
| bool isEmoji(uint32_t c) { |
| return isNewEmoji(c) || u_hasBinaryProperty(c, UCHAR_EMOJI); |
| } |
| |
| bool isEmojiModifier(uint32_t c) { |
| // Emoji modifier are not expected to change, so there's a small change we need to customize |
| // this. |
| return u_hasBinaryProperty(c, UCHAR_EMOJI_MODIFIER); |
| } |
| |
| bool isEmojiBase(uint32_t 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 5.0. |
| // From http://www.unicode.org/Public/emoji/5.0/emoji-data.txt |
| // TODO: Remove once emoji-data.text 5.0 is in ICU or update to 6.0. |
| if (c == 0x1F91F |
| || (0x1F931 <= c && c <= 0x1F932) |
| || (0x1F9D1 <= c && c <= 0x1F9DD)) { |
| return true; |
| } |
| return u_hasBinaryProperty(c, UCHAR_EMOJI_MODIFIER_BASE); |
| } |
| |
| UCharDirection emojiBidiOverride(const void* /* context */, UChar32 c) { |
| if (isNewEmoji(c)) { |
| // All new emoji characters in Unicode 10.0 are of the bidi class ON. |
| return U_OTHER_NEUTRAL; |
| } else { |
| return u_charDirection(c); |
| } |
| } |
| |
| } // namespace minikin |
| |