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Regex for Emoji (#982)

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This commit is contained in:
Stanislav Dmitrenko
2022-08-30 08:50:44 +01:00
committed by GitHub
parent 14f6e5c16f
commit 2d4348c50d
1 changed files with 12 additions and 5 deletions
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apps/android/app/src/main/java/chat/simplex/app/views/chat/item/EmojiItemView.kt
+12 -5
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@@ -31,12 +31,19 @@ fun EmojiText(text: String) {
Text(s, style = if (s.codePoints().count() < 4) largeEmojiFont else mediumEmojiFont)
}
private fun isSimpleEmoji(c: Int): Boolean = c > 0x238C
// https://stackoverflow.com/a/46279500
private const val emojiStr = "^(" +
"(?:[\\u2700-\\u27bf]|" +
"(?:[\\ud83c\\udde6-\\ud83c\\uddff]){2}|" +
"[\\ud800\\udc00-\\uDBFF\\uDFFF]|[\\u2600-\\u26FF])[\\ufe0e\\ufe0f]?(?:[\\u0300-\\u036f\\ufe20-\\ufe23\\u20d0-\\u20f0]|[\\ud83c\\udffb-\\ud83c\\udfff])?" +
"(?:\\u200d(?:[^\\ud800-\\udfff]|" +
"(?:[\\ud83c\\udde6-\\ud83c\\uddff]){2}|" +
"[\\ud800\\udc00-\\uDBFF\\uDFFF]|[\\u2600-\\u26FF])[\\ufe0e\\ufe0f]?(?:[\\u0300-\\u036f\\ufe20-\\ufe23\\u20d0-\\u20f0]|[\\ud83c\\udffb-\\ud83c\\udfff])?)*|" +
"[\\u0023-\\u0039]\\ufe0f?\\u20e3|\\u3299|\\u3297|\\u303d|\\u3030|\\u24c2|[\\ud83c\\udd70-\\ud83c\\udd71]|[\\ud83c\\udd7e-\\ud83c\\udd7f]|\\ud83c\\udd8e|[\\ud83c\\udd91-\\ud83c\\udd9a]|[\\ud83c\\udde6-\\ud83c\\uddff]|[\\ud83c\\ude01-\\ud83c\\ude02]|\\ud83c\\ude1a|\\ud83c\\ude2f|[\\ud83c\\ude32-\\ud83c\\ude3a]|[\\ud83c\\ude50-\\ud83c\\ude51]|\\u203c|\\u2049|[\\u25aa-\\u25ab]|\\u25b6|\\u25c0|[\\u25fb-\\u25fe]|\\u00a9|\\u00ae|\\u2122|\\u2139|\\ud83c\\udc04|[\\u2600-\\u26FF]|\\u2b05|\\u2b06|\\u2b07|\\u2b1b|\\u2b1c|\\u2b50|\\u2b55|\\u231a|\\u231b|\\u2328|\\u23cf|[\\u23e9-\\u23f3]|[\\u23f8-\\u23fa]|\\ud83c\\udccf|\\u2934|\\u2935|[\\u2190-\\u21ff]" +
")+$" // Multiple matches with emojis where one follows another without interruptions from other characters
private val emojiRegex = Regex(emojiStr)
fun isEmoji(c: Int): Boolean = isSimpleEmoji(c) // || isCombinedIntoEmoji(c)
// TODO count perceived emojis, possibly using icu4j
fun isShortEmoji(str: String): Boolean {
val s = str.trim()
return s.codePoints().count() in 1..5 && s.codePoints().allMatch(::isEmoji)
return s.codePoints().count() in 1..5 && emojiRegex.matches(str)
}