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improve detection of emojis when deleting

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Helium314 2025-02-03 00:11:34 +01:00
parent ad3086183d
commit 73988394a9
2 changed files with 26 additions and 4 deletions
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19
app/src/main/java/helium314/keyboard/latin/common/StringUtils.kt
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@ -62,21 +62,32 @@ fun getFullEmojiAtEnd(s: CharSequence): String {
while (offset > 0) {
val codepoint = text.codePointBefore(offset)
// stop if codepoint can't be emoji
if (!mightBeEmoji(codepoint)) return ""
if (!mightBeEmoji(codepoint))
return text.substring(offset)
offset -= Character.charCount(codepoint)
// todo: if codepoint in 0x1F3FB..0x1F3FF -> combine with other emojis in front, but only if they actually combine
// why isn't this done with zwj like everything else? skin tones can be emojis by themselves...
if (offset > 0 && text[offset - 1].code == KeyCode.ZWJ) {
// todo: this appends ZWJ in weird cases like text, ZWJ, emoji
// and detects single ZWJ as emoji (at least irrelevant for current use of getFullEmojiAtEnd)
offset -= 1
continue
}
if (codepoint in 0x1F3FB..0x1F3FF) {
// Skin tones are not added with ZWJ, but just appended. This is not nice as they can be emojis on their own,
// but that's how it is done. Assume that an emoji before the skin tone will get merged (usually correct in practice)
val codepointBefore = text.codePointBefore(offset)
if (isEmoji(codepointBefore)) {
offset -= Character.charCount(codepointBefore)
continue
}
}
// check the whole text after offset
val textToCheck = text.substring(offset)
if (isEmoji(textToCheck)) {
return textToCheck
}
}
return ""
return text.substring(offset)
}
/** split the string on the first of consecutive space only, further consecutive spaces are added to the next split */