mirror of
https://github.com/nextcloud/talk-android
synced 2025-07-10 22:34:15 +01:00
102 lines
3.3 KiB
Java
102 lines
3.3 KiB
Java
/*
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* Nextcloud Talk application
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*
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* @author Mario Danic
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* Copyright (C) 2017-2018 Mario Danic <mario@lovelyhq.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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* Partly based on https://github.com/kevalpatel2106/EmoticonGIFKeyboard/blob/master/emoticongifkeyboard/src/main/java/com/kevalpatel2106/emoticongifkeyboard/internal/emoticon/EmoticonUtils.java
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*/
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package com.nextcloud.talk.utils;
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import android.content.Context;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.text.TextUtils;
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import android.util.Log;
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import com.nextcloud.talk.R;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public final class EmojiDetection {
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private static final String TAG = "EmojiDetection";
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private static Pattern regexPattern;
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public static boolean isMessageWithSingleEmoticonOnly(@NonNull final Context context,
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@Nullable final CharSequence text) {
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int startPosition = -1;
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int endPosition = -1;
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if (!TextUtils.isEmpty(text)) {
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final Matcher matcher = getRegex(context).matcher(text);
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while (matcher.find()) {
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if (startPosition == -1 && endPosition == -1) {
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startPosition = matcher.start();
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endPosition = matcher.end();
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} else {
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return false;
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}
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}
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} else {
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return false;
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}
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return startPosition == 0 && text.length() == endPosition;
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}
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@NonNull
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private static Pattern getRegex(@NonNull final Context context) {
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if (regexPattern == null) {
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String regex = readTextFile(context, R.raw.regex);
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regexPattern = Pattern.compile(regex);
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}
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return regexPattern;
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}
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@NonNull
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private static String readTextFile(@NonNull Context context, int rowResource) {
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InputStream inputStream = context.getResources().openRawResource(rowResource);
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BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
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StringBuilder builder = new StringBuilder();
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try {
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String sCurrentLine;
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while ((sCurrentLine = br.readLine()) != null) builder.append(sCurrentLine);
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} catch (IOException e) {
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Log.e(TAG, e.getLocalizedMessage());
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} finally {
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try {
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inputStream.close();
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br.close();
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} catch (IOException e) {
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Log.e(TAG, e.getLocalizedMessage());
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}
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}
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return builder.toString();
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}
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}
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