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+/*
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+ * Copyright 2017 Keval Patel.
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+ *
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+ * Licensed under the Apache License, Version 2.0 (the "License");
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+ * you may not use this file except in compliance with the License.
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+ * You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ *
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+ * Modified by Mario Danic (mario@lovelyhq.com) - Copyright 2018
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+ */
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+
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+package com.nextcloud.talk.utils.emoticons;
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+
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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.Spannable;
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+import android.text.TextUtils;
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+
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+import com.kevalpatel2106.emoticongifkeyboard.R;
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+import com.kevalpatel2106.emoticongifkeyboard.emoticons.Emoticon;
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+import com.kevalpatel2106.emoticongifkeyboard.emoticons.EmoticonProvider;
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+
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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.ArrayList;
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+import java.util.List;
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+import java.util.regex.Matcher;
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+import java.util.regex.Pattern;
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+
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+/**
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+ * Created by Keval Patel on 20/08/17.
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+ * Utils to find emoticons from the string.
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+ *
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+ * @author 'https://github.com/kevalpatel2106'
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+ */
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+
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+public final class EmoticonUtils {
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+ /**
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+ * {@link Pattern} to find the supported emoticons unicodes.
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+ */
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+ private static Pattern sRegexPattern;
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+
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+ /**
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+ * Private constructor.
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+ */
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+ private EmoticonUtils() {
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+ //Do nothing
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+ }
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+
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+ /**
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+ * Replace the system emoticons with the provided custom emoticons drawable. This will find the
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+ * unicodes with supported emoticons in the provided text and will replace the emoticons with
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+ * appropriate images.
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+ *
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+ * @param context instance of caller.
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+ * @param text Text to replace
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+ * @param emoticonProvider {@link EmoticonProvider} for emoticons images
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+ * @param emoticonSize Size of the emoticons in dp
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+ * @return Modified text.
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+ */
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+ public static void replaceWithImages(@NonNull final Context context,
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+ @NonNull final Spannable text,
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+ @NonNull final EmoticonProvider emoticonProvider,
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+ final int emoticonSize) {
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+
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+ final EmoticonSpan[] existingSpans = text.getSpans(0, text.length(), EmoticonSpan.class);
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+ final ArrayList<Integer> existingSpanPositions = new ArrayList<>(existingSpans.length);
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+ for (EmoticonSpan existingSpan : existingSpans)
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+ existingSpanPositions.add(text.getSpanStart(existingSpan));
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+
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+ //Get location and unicode of all emoticons.
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+ final List<EmoticonRange> findAllEmojis = findAllEmoticons(context, text, emoticonProvider);
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+
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+ //Replace all the emoticons with their relatives.
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+ for (int i = 0; i < findAllEmojis.size(); i++) {
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+ final EmoticonRange location = findAllEmojis.get(i);
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+ if (!existingSpanPositions.contains(location.mStartPos)) {
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+ text.setSpan(new EmoticonSpan(context, location.mEmoticon.getIcon(), emoticonSize),
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+ location.mStartPos,
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+ location.mEndPos,
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+ Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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+ }
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+ }
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+ }
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+
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+ /**
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+ * Find all the unicodes that represents emoticons and location of starting and ending point of that emoticon.
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+ *
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+ * @param context Instance of caller.
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+ * @param text Text to replace
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+ * @param emoticonProvider {@link EmoticonProvider} for emoticons images
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+ * @return List of {@link EmoticonRange}.
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+ * @see EmoticonRange
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+ */
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+ @NonNull
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+ private static List<EmoticonRange> findAllEmoticons(@NonNull final Context context,
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+ @Nullable final CharSequence text,
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+ @NonNull final EmoticonProvider emoticonProvider) {
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+ final List<EmoticonRange> result = new ArrayList<>();
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+
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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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+ String unicode = text.subSequence(matcher.start(), matcher.end()).toString();
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+ if (emoticonProvider.hasEmoticonIcon(unicode)) { //Check if the the emoticon has icon?
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+ final Emoticon found = new Emoticon(unicode, emoticonProvider.getIcon(unicode));
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+
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+ //Add this emoticon to change list.
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+ result.add(new EmoticonRange(matcher.start(), matcher.end(), found));
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+ }
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+ }
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+ }
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+
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+ return result;
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+ }
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+
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+
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+ public static boolean isMessageWithSingleEmoticonOnly(@NonNull final Context context,
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+ @Nullable final CharSequence text) {
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+ final List<EmoticonRange> result = new ArrayList<>();
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+
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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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+ String unicode = text.subSequence(matcher.start(), matcher.end()).toString();
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+ // quick hack
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+ final Emoticon found = new Emoticon(unicode, R.drawable.emoji_food);
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+ //Add this emoticon to change list.
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+ result.add(new EmoticonRange(matcher.start(), matcher.end(), found));
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+ }
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+ } else {
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+ return false;
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+ }
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+
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+ return result.size() == 1 && result.get(0).mStartPos == 0 && text.length() == result.get(0).mEndPos;
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+ }
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+
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+ /**
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+ * Load the regex to parse unicode from the shared preference if {@link #sRegexPattern} is not
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+ * loaded.
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+ *
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+ * @param context Instance.
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+ * @return Regex to find emoticon unicode from string.
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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 (sRegexPattern == null) {
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+ String regex = readTextFile(context, R.raw.regex);
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+ sRegexPattern = Pattern.compile(regex);
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+ }
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+ return sRegexPattern;
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+ }
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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); // getting json
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+ BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
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+
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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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+ e.printStackTrace();
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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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+ e.printStackTrace();
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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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+
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+ /**
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+ * Range of the emoticons unicode.
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+ */
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+ private static final class EmoticonRange {
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+
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+ /**
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+ * Start portion of the emoticon in string.
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+ */
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+ final int mStartPos;
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+
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+ /**
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+ * End portion of the emoticon in string.
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+ */
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+ final int mEndPos;
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+
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+ /**
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+ * {@link Emoticon}.
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+ */
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+ final Emoticon mEmoticon;
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+
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+ /**
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+ * Private constructor.
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+ *
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+ * @param start Start portion of the emoticon in string.
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+ * @param end End portion of the emoticon in string.
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+ * @param emoticon {@link Emoticon}
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+ */
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+ private EmoticonRange(final int start,
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+ final int end,
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+ @NonNull final Emoticon emoticon) {
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+ this.mStartPos = start;
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+ this.mEndPos = end;
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+ this.mEmoticon = emoticon;
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+ }
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+
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+ @Override
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+ public boolean equals(final Object o) {
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+ if (this == o) return true;
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+ if (o == null || getClass() != o.getClass()) return false;
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+
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+ final EmoticonRange that = (EmoticonRange) o;
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+ return mStartPos == that.mStartPos
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+ && mEndPos == that.mEndPos
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+ && mEmoticon.equals(that.mEmoticon);
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+ }
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+
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+ @Override
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+ public int hashCode() {
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+ int result = mStartPos;
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+ result = 31 * result + mEndPos;
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+ result = 31 * result + mEmoticon.hashCode();
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+ return result;
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+ }
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+ }
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+}
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Mario Danic