76 lines
2.1 KiB
Kotlin
76 lines
2.1 KiB
Kotlin
/*
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* Husky -- A Pleroma client for Android
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*
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* Copyright (C) 2021 The Husky Developers
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General 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
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package com.keylesspalace.tusky.core.extensions
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import java.util.regex.Pattern
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/**
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* Returns an empty String.
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*
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* @return An empty string.
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*/
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fun String.Companion.empty(): String {
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return ""
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}
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/**
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* Add https protocol to the URL.
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*
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* @return The url with https:// in front, null otherwise.
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*/
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fun String?.addHttpsProtocolUrl(): String {
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if(this != null) {
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if(!this.contains("https", true)) {
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return ("https://$this")
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}
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}
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return String.empty()
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}
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/**
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* Returns the text with emojis and zero-width space characters at the start and end positions.
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*
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* @return String with zero-width space characters at start and end positions for emojis.
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*/
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fun String.composeWithZwsp(): String {
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val zwspChar = '\u200b'
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val pattern = Pattern.compile("(:)([a-zA-Z0-9_]*)(:( )?(\\R)?)")
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val matcher = pattern.matcher(this)
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var end: Int
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val originalString = StringBuilder(this)
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while(matcher.find()) {
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end = matcher.end()
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if(end < originalString.length) {
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val endChar = originalString[end - 1]
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if(endChar.isWhitespace()) {
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if(!originalString[end].isLetterOrDigit() && !endChar.isBreakline()) {
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originalString.setCharAt(end - 1, zwspChar)
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}
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}
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}
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}
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return originalString.toString().trim()
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}
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