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106 lines
3.3 KiB
106 lines
3.3 KiB
/* Copyright 2017 Andrew Dawson
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*
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* This file is a part of Tusky.
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with Tusky; if not,
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* see <http://www.gnu.org/licenses>. */
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package com.keylesspalace.tusky.util
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import android.text.SpannableString
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import android.text.Spanned
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import android.text.TextUtils
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import android.util.Log
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import android.widget.MultiAutoCompleteTextView
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class ComposeTokenizer : MultiAutoCompleteTextView.Tokenizer {
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private fun isMentionOrHashtagAllowedCharacter(character: Char) : Boolean {
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return Character.isLetterOrDigit(character) || character == '_' // simple usernames
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|| character == '-' // extended usernames
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|| character == '.' // domain dot
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}
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override fun findTokenStart(text: CharSequence, cursor: Int): Int {
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if (cursor == 0) {
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return cursor
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}
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var i = cursor
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var character = text[i - 1]
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while(i > 0 && !(character == '@' || character == '#' || character == ':')) {
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if(!isMentionOrHashtagAllowedCharacter(character)) {
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return cursor
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}
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i--
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character = if (i == 0) ' ' else text[i - 1]
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}
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// caught domain name, try search username
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// don't ask me about this code
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if(i > 3 && character == '@') {
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var j = i - 1
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var character2 = text[i - 1]
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while(j > 0 && character2 != '@') {
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if(!isMentionOrHashtagAllowedCharacter(character2)) {
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break
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}
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j--
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character2 = if (j == 0) ' ' else text[j - 1]
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}
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if(character2 == '@') {
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i = j
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character = character2
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}
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}
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// Log.d("Tokenizer", "Stopped search at ${character} ${text.substring(i)}")
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if (i < 1
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|| (character != '@' && character != '#' && character != ':')
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|| i > 1 && !Character.isWhitespace(text[i - 2])) {
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return cursor
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}
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return i - 1
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}
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override fun findTokenEnd(text: CharSequence, cursor: Int): Int {
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var i = cursor
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val length = text.length
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while (i < length) {
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if (text[i] == ' ') {
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return i
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} else {
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i++
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}
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}
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return length
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}
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override fun terminateToken(text: CharSequence): CharSequence {
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var i = text.length
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while (i > 0 && text[i - 1] == ' ') {
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i--
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}
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return if (i > 0 && text[i - 1] == ' ') {
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text
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} else if (text is Spanned) {
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val s = SpannableString(text.toString() + " ")
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TextUtils.copySpansFrom(text, 0, text.length, Object::class.java, s, 0)
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s
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} else {
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text.toString() + " "
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}
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}
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}
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