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/* Copyright 2017 Andrew Dawson
*
* This file is a part of Tusky.
*
* This program is free software; you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along with Tusky; if not,
* see <http://www.gnu.org/licenses>. */
package com.keylesspalace.tusky.util
import android.text.SpannableString
import android.text.Spanned
import android.text.TextUtils
import android.widget.MultiAutoCompleteTextView
class MentionTokenizer : MultiAutoCompleteTextView.Tokenizer {
override fun findTokenStart(text: CharSequence, cursor: Int): Int {
if (cursor == 0) {
return cursor
}
var i = cursor
var character = text[i - 1]
while (i > 0 && character != '@') {
// See SpanUtils.MENTION_REGEX
if (!Character.isLetterOrDigit(character) && character != '_') {
return cursor
}
i--
character = if (i == 0) ' ' else text[i - 1]
}
if (i < 1 || character != '@') {
return cursor
}
return i
}
override fun findTokenEnd(text: CharSequence, cursor: Int): Int {
var i = cursor
val length = text.length
while (i < length) {
if (text[i] == ' ') {
return i
} else {
i++
}
}
return length
}
override fun terminateToken(text: CharSequence): CharSequence {
var i = text.length
while (i > 0 && text[i - 1] == ' ') {
i--
}
return if (i > 0 && text[i - 1] == ' ') {
text
} else if (text is Spanned) {
val s = SpannableString(text.toString() + " ")
TextUtils.copySpansFrom(text, 0, text.length, Object::class.java, s, 0)
s
} else {
text.toString() + " "
}
}
}