453ca7c0ed
Unignored gradle.properties since androidX requires additions there See also https://developer.android.com/jetpack/androidx/migrate
310 lines
11 KiB
Java
310 lines
11 KiB
Java
/*
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* Copyright (c) 2017, Daniel Gultsch All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package eu.siacs.conversations.utils;
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import androidx.annotation.NonNull;
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import android.util.LruCache;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.List;
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import java.util.regex.Pattern;
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public class Emoticons {
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private static final UnicodeRange MISC_SYMBOLS_AND_PICTOGRAPHS = new UnicodeRange(0x1F300, 0x1F5FF);
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private static final UnicodeRange SUPPLEMENTAL_SYMBOLS = new UnicodeRange(0x1F900, 0x1F9FF);
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private static final UnicodeRange EMOTICONS = new UnicodeRange(0x1F600, 0x1F64F);
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private static final UnicodeRange TRANSPORT_SYMBOLS = new UnicodeRange(0x1F680, 0x1F6FF);
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private static final UnicodeRange MISC_SYMBOLS = new UnicodeRange(0x2600, 0x26FF);
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private static final UnicodeRange DINGBATS = new UnicodeRange(0x2700, 0x27BF);
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private static final UnicodeRange ENCLOSED_ALPHANUMERIC_SUPPLEMENT = new UnicodeRange(0x1F100, 0x1F1FF);
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private static final UnicodeRange ENCLOSED_IDEOGRAPHIC_SUPPLEMENT = new UnicodeRange(0x1F200, 0x1F2FF);
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private static final UnicodeRange REGIONAL_INDICATORS = new UnicodeRange(0x1F1E6, 0x1F1FF);
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private static final UnicodeRange GEOMETRIC_SHAPES = new UnicodeRange(0x25A0, 0x25FF);
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private static final UnicodeRange LATIN_SUPPLEMENT = new UnicodeRange(0x80, 0xFF);
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private static final UnicodeRange MISC_TECHNICAL = new UnicodeRange(0x2300, 0x23FF);
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private static final UnicodeRange TAGS = new UnicodeRange(0xE0020, 0xE007F);
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private static final UnicodeList CYK_SYMBOLS_AND_PUNCTUATION = new UnicodeList(0x3030, 0x303D);
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private static final UnicodeList LETTERLIKE_SYMBOLS = new UnicodeList(0x2122, 0x2139);
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private static final UnicodeBlocks KEYCAP_COMBINEABLE = new UnicodeBlocks(new UnicodeList(0x23), new UnicodeList(0x2A), new UnicodeRange(0x30, 0x39));
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private static final UnicodeBlocks SYMBOLIZE = new UnicodeBlocks(
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GEOMETRIC_SHAPES,
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LATIN_SUPPLEMENT,
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CYK_SYMBOLS_AND_PUNCTUATION,
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LETTERLIKE_SYMBOLS,
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KEYCAP_COMBINEABLE);
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private static final UnicodeBlocks EMOJIS = new UnicodeBlocks(
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MISC_SYMBOLS_AND_PICTOGRAPHS,
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SUPPLEMENTAL_SYMBOLS,
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EMOTICONS,
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TRANSPORT_SYMBOLS,
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MISC_SYMBOLS,
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DINGBATS,
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ENCLOSED_ALPHANUMERIC_SUPPLEMENT,
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ENCLOSED_IDEOGRAPHIC_SUPPLEMENT,
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MISC_TECHNICAL);
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private static final int MAX_EMOIJS = 42;
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private static final int ZWJ = 0x200D;
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private static final int VARIATION_16 = 0xFE0F;
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private static final int COMBINING_ENCLOSING_KEYCAP = 0x20E3;
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private static final int BLACK_FLAG = 0x1F3F4;
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private static final UnicodeRange FITZPATRICK = new UnicodeRange(0x1F3FB, 0x1F3FF);
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private static final LruCache<CharSequence, Pattern> CACHE = new LruCache<>(256);
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private static List<Symbol> parse(String input) {
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List<Symbol> symbols = new ArrayList<>();
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Builder builder = new Builder();
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boolean needsFinalBuild = false;
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for (int cp, i = 0; i < input.length(); i += Character.charCount(cp)) {
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cp = input.codePointAt(i);
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if (builder.offer(cp)) {
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needsFinalBuild = true;
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} else {
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symbols.add(builder.build());
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builder = new Builder();
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if (builder.offer(cp)) {
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needsFinalBuild = true;
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}
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}
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}
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if (needsFinalBuild) {
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symbols.add(builder.build());
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}
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return symbols;
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}
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public static Pattern getEmojiPattern(final CharSequence input) {
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Pattern pattern = CACHE.get(input);
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if (pattern == null) {
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pattern = generatePattern(input);
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CACHE.put(input, pattern);
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}
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return pattern;
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}
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private static Pattern generatePattern(CharSequence input) {
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final HashSet<String> emojis = new HashSet<>();
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int i = 0;
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for (final Symbol symbol : parse(input.toString())) {
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if (symbol instanceof Emoji) {
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emojis.add(symbol.toString());
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if (++i >= MAX_EMOIJS) {
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return Pattern.compile("");
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}
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}
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}
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final StringBuilder pattern = new StringBuilder();
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for (String emoji : emojis) {
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if (pattern.length() != 0) {
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pattern.append('|');
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}
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pattern.append(Pattern.quote(emoji));
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}
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return Pattern.compile(pattern.toString());
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}
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public static boolean isEmoji(String input) {
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List<Symbol> symbols = parse(input);
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return symbols.size() == 1 && symbols.get(0).isEmoji();
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}
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public static boolean isOnlyEmoji(String input) {
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List<Symbol> symbols = parse(input);
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for (Symbol symbol : symbols) {
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if (!symbol.isEmoji()) {
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return false;
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}
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}
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return symbols.size() > 0;
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}
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private static abstract class Symbol {
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private final String value;
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Symbol(List<Integer> codepoints) {
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final StringBuilder builder = new StringBuilder();
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for (final Integer codepoint : codepoints) {
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builder.appendCodePoint(codepoint);
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}
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this.value = builder.toString();
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}
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abstract boolean isEmoji();
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@NonNull
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@Override
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public String toString() {
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return value;
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}
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}
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public static class Emoji extends Symbol {
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Emoji(List<Integer> codepoints) {
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super(codepoints);
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}
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@Override
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boolean isEmoji() {
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return true;
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}
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}
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public static class Other extends Symbol {
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public Other(List<Integer> codepoints) {
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super(codepoints);
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}
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@Override
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boolean isEmoji() {
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return false;
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}
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}
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private static class Builder {
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private final List<Integer> codepoints = new ArrayList<>();
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public boolean offer(int codepoint) {
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boolean add = false;
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if (this.codepoints.size() == 0) {
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if (SYMBOLIZE.contains(codepoint)) {
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add = true;
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} else if (REGIONAL_INDICATORS.contains(codepoint)) {
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add = true;
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} else if (EMOJIS.contains(codepoint) && !FITZPATRICK.contains(codepoint) && codepoint != ZWJ) {
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add = true;
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}
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} else {
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int previous = codepoints.get(codepoints.size() - 1);
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if (codepoints.get(0) == BLACK_FLAG) {
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add = TAGS.contains(codepoint);
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} else if (COMBINING_ENCLOSING_KEYCAP == codepoint) {
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add = KEYCAP_COMBINEABLE.contains(previous) || previous == VARIATION_16;
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} else if (SYMBOLIZE.contains(previous)) {
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add = codepoint == VARIATION_16;
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} else if (REGIONAL_INDICATORS.contains(previous) && REGIONAL_INDICATORS.contains(codepoint)) {
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add = codepoints.size() == 1;
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} else if (previous == VARIATION_16) {
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add = isMerger(codepoint) || codepoint == VARIATION_16;
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} else if (FITZPATRICK.contains(previous)) {
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add = codepoint == ZWJ;
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} else if (ZWJ == previous) {
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add = EMOJIS.contains(codepoint);
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} else if (isMerger(codepoint)) {
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add = true;
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} else if (codepoint == VARIATION_16 && EMOJIS.contains(previous)) {
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add = true;
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}
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}
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if (add) {
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codepoints.add(codepoint);
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return true;
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} else {
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return false;
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}
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}
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private static boolean isMerger(int codepoint) {
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return codepoint == ZWJ || FITZPATRICK.contains(codepoint);
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}
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public Symbol build() {
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if (codepoints.size() > 0 && SYMBOLIZE.contains(codepoints.get(codepoints.size() - 1))) {
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return new Other(codepoints);
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} else if (codepoints.size() > 1 && KEYCAP_COMBINEABLE.contains(codepoints.get(0)) && codepoints.get(codepoints.size() - 1) != COMBINING_ENCLOSING_KEYCAP) {
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return new Other(codepoints);
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}
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return codepoints.size() == 0 ? new Other(codepoints) : new Emoji(codepoints);
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}
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}
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public static class UnicodeBlocks implements UnicodeSet {
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final UnicodeSet[] unicodeSets;
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UnicodeBlocks(final UnicodeSet... sets) {
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this.unicodeSets = sets;
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}
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@Override
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public boolean contains(int codepoint) {
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for (UnicodeSet unicodeSet : unicodeSets) {
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if (unicodeSet.contains(codepoint)) {
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return true;
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}
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}
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return false;
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}
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}
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public interface UnicodeSet {
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boolean contains(int codepoint);
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}
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public static class UnicodeList implements UnicodeSet {
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private final List<Integer> list;
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UnicodeList(final Integer... codes) {
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this.list = Arrays.asList(codes);
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}
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@Override
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public boolean contains(int codepoint) {
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return this.list.contains(codepoint);
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}
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}
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public static class UnicodeRange implements UnicodeSet {
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private final int lower;
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private final int upper;
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UnicodeRange(int lower, int upper) {
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this.lower = lower;
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this.upper = upper;
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}
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public boolean contains(int codePoint) {
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return codePoint >= lower && codePoint <= upper;
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}
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}
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}
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