93 lines
3.2 KiB
Kotlin
93 lines
3.2 KiB
Kotlin
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
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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 <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.twidere.util
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import org.apache.commons.text.translate.AggregateTranslator
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import org.apache.commons.text.translate.CodePointTranslator
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import org.apache.commons.text.translate.EntityArrays
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import org.apache.commons.text.translate.LookupTranslator
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import org.apache.commons.text.translate.NumericEntityUnescaper
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import java.io.IOException
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import java.io.Writer
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object HtmlEscapeHelper {
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val ESCAPE_BASIC = LookupTranslator(EntityArrays.BASIC_ESCAPE)
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val ESCAPE_HTML = AggregateTranslator(
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LookupTranslator(EntityArrays.BASIC_ESCAPE),
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LookupTranslator(EntityArrays.ISO8859_1_ESCAPE),
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LookupTranslator(EntityArrays.HTML40_EXTENDED_ESCAPE),
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UnicodeControlCharacterToHtmlTranslator()
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)
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val UNESCAPE_HTML = AggregateTranslator(
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LookupTranslator(EntityArrays.BASIC_UNESCAPE),
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LookupTranslator(EntityArrays.ISO8859_1_UNESCAPE),
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LookupTranslator(EntityArrays.HTML40_EXTENDED_UNESCAPE),
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LookupTranslator(EntityArrays.APOS_UNESCAPE),
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IgnoreErrorNumericEntityUnescaper()
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)
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fun escape(text: CharSequence): String {
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return ESCAPE_HTML.translate(text)
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}
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fun toPlainText(string: String): String {
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return unescape(string.replace("<br/>", "\n").replace("<!--.*?-->|<[^>]+>".toRegex(), ""))
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}
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fun unescape(string: String): String {
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return UNESCAPE_HTML.translate(string)
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}
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fun escapeBasic(text: CharSequence): String {
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return ESCAPE_BASIC.translate(text)
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}
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private class UnicodeControlCharacterToHtmlTranslator : CodePointTranslator() {
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@Throws(IOException::class)
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override fun translate(codePoint: Int, out: Writer): Boolean {
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if (Character.isISOControl(codePoint)) {
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out.append("&#x")
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val chars = Character.toChars(codePoint)
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for (c in chars) {
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out.append(Integer.toHexString(c.toInt()))
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}
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out.append(';')
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return true
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}
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return false
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}
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}
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private class IgnoreErrorNumericEntityUnescaper : NumericEntityUnescaper() {
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override fun translate(input: CharSequence?, index: Int, out: Writer?): Int {
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return try {
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super.translate(input, index, out)
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} catch (e: IllegalArgumentException) {
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// Ignore unsupported code points
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0
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}
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}
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}
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}
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