Browse Source
Adapted from SpiritCroc's SchildNext implementation from
7eba87f02e
Fixes: https://github.com/element-hq/element-x-android/issues/1438
Signed-off-by: Tobias BΓΌttner <dev@spiritcroc.de>
Signed-off-by: Joe Groocock <me@frebib.net>
pull/3295/head
SpiritCroc
4 weeks ago
committed by
Joe Groocock
8 changed files with 106 additions and 1 deletions
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/* |
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* Copyright (c) 2024 New Vector Ltd |
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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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* https://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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package io.element.android.features.messages.impl.utils |
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import com.sigpwned.emoji4j.core.Grapheme.Type.EMOJI |
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import com.sigpwned.emoji4j.core.Grapheme.Type.PICTOGRAPHIC |
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import com.sigpwned.emoji4j.core.GraphemeMatchResult |
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import com.sigpwned.emoji4j.core.GraphemeMatcher |
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/** |
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* Returns true if the string consists exclusively of "emoji or pictographic graphemes". |
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*/ |
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fun String.containsOnlyEmojis(): Boolean { |
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if (isEmpty()) return false |
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val matcher = GraphemeMatcher(this) |
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var m: GraphemeMatchResult? = null |
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var contiguous = true |
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var previous = 0 |
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while (contiguous && matcher.find()) { |
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m = matcher.toMatchResult() |
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// Many non-"emoji" characters are pictographics. We only want to identify this specific range |
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// https://en.wikipedia.org/wiki/Miscellaneous_Symbols_and_Pictographs |
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val isEmoji = m!!.grapheme().type == EMOJI || (m.grapheme().type == PICTOGRAPHIC && m.group() in "π".."πΊ") |
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contiguous = isEmoji and (m.start() == previous) |
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previous = m.end() |
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} |
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return contiguous and (m?.end() == length) |
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} |
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