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MaximalNumberOfEmojisInputFilter.kt
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MaximalNumberOfEmojisInputFilter.kt
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/*
* Copyright (C) 2016 - Niklas Baudy, Ruben Gees, Mario Đanić and contributors
*
* 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.
*/
package com.vanniktech.emoji.inputfilters
import android.text.InputFilter
import android.text.Spanned
import com.vanniktech.emoji.emojiInformation
/** Input Filter that accepts only a certain number of Emojis. */
class MaximalNumberOfEmojisInputFilter(
private val maxCount: Int,
) : InputFilter {
override fun filter(source: CharSequence, start: Int, end: Int, dest: Spanned, dstart: Int, dend: Int): CharSequence? {
val (_, emojis) = dest.subSequence(0, dest.length).emojiInformation()
return when {
emojis.size >= maxCount -> "" // Reject.
else -> null
}
}
}