diff options
Diffstat (limited to 'app/assets/javascripts/emoji/support/is_emoji_unicode_supported.js')
-rw-r--r-- | app/assets/javascripts/emoji/support/is_emoji_unicode_supported.js | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/app/assets/javascripts/emoji/support/is_emoji_unicode_supported.js b/app/assets/javascripts/emoji/support/is_emoji_unicode_supported.js index 3fd23efa9f8..e9defb62cf8 100644 --- a/app/assets/javascripts/emoji/support/is_emoji_unicode_supported.js +++ b/app/assets/javascripts/emoji/support/is_emoji_unicode_supported.js @@ -7,6 +7,17 @@ function isFlagEmoji(emojiUnicode) { return emojiUnicode.length === 4 && cp >= flagACodePoint && cp <= flagZCodePoint; } +// Tested on mac OS 10.12.6 and Windows 10 FCU, it renders as two separate characters +const baseFlagCodePoint = 127987; // parseInt('1F3F3', 16) +const rainbowCodePoint = 127752; // parseInt('1F308', 16) +function isRainbowFlagEmoji(emojiUnicode) { + const characters = Array.from(emojiUnicode); + // Length 4 because flags are made of 2 characters which are surrogate pairs + return emojiUnicode.length === 4 && + characters[0].codePointAt(0) === baseFlagCodePoint && + characters[1].codePointAt(0) === rainbowCodePoint; +} + // Chrome <57 renders keycaps oddly // See https://bugs.chromium.org/p/chromium/issues/detail?id=632294 // Same issue on Windows also fixed in Chrome 57, http://i.imgur.com/rQF7woO.png @@ -57,9 +68,11 @@ function isPersonZwjEmoji(emojiUnicode) { // in `isEmojiUnicodeSupported` logic function checkFlagEmojiSupport(unicodeSupportMap, emojiUnicode) { const isFlagResult = isFlagEmoji(emojiUnicode); + const isRainbowFlagResult = isRainbowFlagEmoji(emojiUnicode); return ( (unicodeSupportMap.flag && isFlagResult) || - !isFlagResult + (unicodeSupportMap.rainbowFlag && isRainbowFlagResult) || + (!isFlagResult && !isRainbowFlagResult) ); } @@ -113,6 +126,7 @@ function isEmojiUnicodeSupported(unicodeSupportMap = {}, emojiUnicode, unicodeVe export { isEmojiUnicodeSupported as default, isFlagEmoji, + isRainbowFlagEmoji, isKeycapEmoji, isSkinToneComboEmoji, isHorceRacingSkinToneComboEmoji, |