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Diffstat (limited to 'src/main/java/de/pixart/messenger/utils/Emoticons.java')
| -rw-r--r-- | src/main/java/de/pixart/messenger/utils/Emoticons.java | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/src/main/java/de/pixart/messenger/utils/Emoticons.java b/src/main/java/de/pixart/messenger/utils/Emoticons.java new file mode 100644 index 000000000..8cfddf8a4 --- /dev/null +++ b/src/main/java/de/pixart/messenger/utils/Emoticons.java @@ -0,0 +1,282 @@ +/* + * Copyright (c) 2017, Daniel Gultsch All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation and/or + * other materials provided with the distribution. + * + * 3. Neither the name of the copyright holder nor the names of its contributors + * may be used to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +package de.pixart.messenger.utils; + +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; +import java.util.regex.Pattern; + +public class Emoticons { + + private static final UnicodeRange MISC_SYMBOLS_AND_PICTOGRAPHS = new UnicodeRange(0x1F300, 0x1F5FF); + private static final UnicodeRange SUPPLEMENTAL_SYMBOLS = new UnicodeRange(0x1F900, 0x1F9FF); + private static final UnicodeRange EMOTICONS = new UnicodeRange(0x1F600, 0x1F64F); + private static final UnicodeRange TRANSPORT_SYMBOLS = new UnicodeRange(0x1F680, 0x1F6FF); + private static final UnicodeRange MISC_SYMBOLS = new UnicodeRange(0x2600, 0x26FF); + private static final UnicodeRange DINGBATS = new UnicodeRange(0x2700, 0x27BF); + private static final UnicodeRange ENCLOSED_ALPHANUMERIC_SUPPLEMENT = new UnicodeRange(0x1F100, 0x1F1FF); + private static final UnicodeRange ENCLOSED_IDEOGRAPHIC_SUPPLEMENT = new UnicodeRange(0x1F200, 0x1F2FF); + private static final UnicodeRange REGIONAL_INDICATORS = new UnicodeRange(0x1F1E6, 0x1F1FF); + private static final UnicodeRange GEOMETRIC_SHAPES = new UnicodeRange(0x25A0, 0x25FF); + private static final UnicodeRange LATIN_SUPPLEMENT = new UnicodeRange(0x80, 0xFF); + private static final UnicodeRange MISC_TECHNICAL = new UnicodeRange(0x2300, 0x23FF); + private static final UnicodeRange TAGS = new UnicodeRange(0xE0020, 0xE007F); + private static final UnicodeList CYK_SYMBOLS_AND_PUNCTUATION = new UnicodeList(0x3030, 0x303D); + private static final UnicodeList LETTERLIKE_SYMBOLS = new UnicodeList(0x2122, 0x2139); + + private static final UnicodeBlocks KEYCAP_COMBINEABLE = new UnicodeBlocks(new UnicodeList(0x23), new UnicodeList(0x2A), new UnicodeRange(0x30, 0x39)); + + private static final UnicodeBlocks SYMBOLIZE = new UnicodeBlocks( + GEOMETRIC_SHAPES, + LATIN_SUPPLEMENT, + CYK_SYMBOLS_AND_PUNCTUATION, + LETTERLIKE_SYMBOLS, + KEYCAP_COMBINEABLE); + private static final UnicodeBlocks EMOJIS = new UnicodeBlocks( + MISC_SYMBOLS_AND_PICTOGRAPHS, + SUPPLEMENTAL_SYMBOLS, + EMOTICONS, + TRANSPORT_SYMBOLS, + MISC_SYMBOLS, + DINGBATS, + ENCLOSED_ALPHANUMERIC_SUPPLEMENT, + ENCLOSED_IDEOGRAPHIC_SUPPLEMENT, + MISC_TECHNICAL); + private static final int ZWJ = 0x200D; + private static final int VARIATION_16 = 0xFE0F; + private static final int COMBINING_ENCLOSING_KEYCAP = 0x20E3; + private static final int BLACK_FLAG = 0x1F3F4; + private static final UnicodeRange FITZPATRICK = new UnicodeRange(0x1F3FB, 0x1F3FF); + + private static List<Symbol> parse(String input) { + List<Symbol> symbols = new ArrayList<>(); + Builder builder = new Builder(); + boolean needsFinalBuild = false; + for (int cp, i = 0; i < input.length(); i += Character.charCount(cp)) { + cp = input.codePointAt(i); + if (builder.offer(cp)) { + needsFinalBuild = true; + } else { + symbols.add(builder.build()); + builder = new Builder(); + if (builder.offer(cp)) { + needsFinalBuild = true; + } + } + } + if (needsFinalBuild) { + symbols.add(builder.build()); + } + return symbols; + } + + public static Pattern generatePattern(CharSequence input) { + final StringBuilder pattern = new StringBuilder(); + for (Symbol symbol : parse(input.toString())) { + if (symbol instanceof Emoji) { + if (pattern.length() != 0) { + pattern.append('|'); + } + pattern.append(Pattern.quote(symbol.toString())); + } + } + return Pattern.compile(pattern.toString()); + } + + public static boolean isEmoji(String input) { + List<Symbol> symbols = parse(input); + return symbols.size() == 1 && symbols.get(0).isEmoji(); + } + + public static boolean isOnlyEmoji(String input) { + List<Symbol> symbols = parse(input); + for (Symbol symbol : symbols) { + if (!symbol.isEmoji()) { + return false; + } + } + return symbols.size() > 0; + } + + private static abstract class Symbol { + + private final String value; + + public Symbol(List<Integer> codepoints) { + StringBuilder builder = new StringBuilder(); + for (Integer codepoint : codepoints) { + builder.appendCodePoint(codepoint); + } + this.value = builder.toString(); + } + + abstract boolean isEmoji(); + + @Override + public String toString() { + return value; + } + } + + public static class Emoji extends Symbol { + + public Emoji(List<Integer> codepoints) { + super(codepoints); + } + + @Override + boolean isEmoji() { + return true; + } + } + + public static class Other extends Symbol { + + public Other(List<Integer> codepoints) { + super(codepoints); + } + + @Override + boolean isEmoji() { + return false; + } + } + + private static class Builder { + private final List<Integer> codepoints = new ArrayList<>(); + + + public boolean offer(int codepoint) { + boolean add = false; + if (this.codepoints.size() == 0) { + if (SYMBOLIZE.contains(codepoint)) { + add = true; + } else if (REGIONAL_INDICATORS.contains(codepoint)) { + add = true; + } else if (EMOJIS.contains(codepoint) && !FITZPATRICK.contains(codepoint) && codepoint != ZWJ) { + add = true; + } + } else { + int previous = codepoints.get(codepoints.size() - 1); + if (codepoints.get(0) == BLACK_FLAG) { + add = TAGS.contains(codepoint); + } else if (COMBINING_ENCLOSING_KEYCAP == codepoint) { + add = KEYCAP_COMBINEABLE.contains(previous) || previous == VARIATION_16; + } else if (SYMBOLIZE.contains(previous)) { + add = codepoint == VARIATION_16; + } else if (REGIONAL_INDICATORS.contains(previous) && REGIONAL_INDICATORS.contains(codepoint)) { + add = codepoints.size() == 1; + } else if (previous == VARIATION_16) { + add = isMerger(codepoint); + } else if (FITZPATRICK.contains(previous)) { + add = codepoint == ZWJ; + } else if (ZWJ == previous) { + add = EMOJIS.contains(codepoint); + } else if (isMerger(codepoint)) { + add = true; + } else if (codepoint == VARIATION_16 && EMOJIS.contains(previous)) { + add = true; + } + } + if (add) { + codepoints.add(codepoint); + return true; + } else { + return false; + } + } + + static boolean isMerger(int codepoint) { + return codepoint == ZWJ || FITZPATRICK.contains(codepoint); + } + + public Symbol build() { + if (codepoints.size() > 0 && SYMBOLIZE.contains(codepoints.get(codepoints.size() - 1))) { + return new Other(codepoints); + } else if (codepoints.size() > 1 && KEYCAP_COMBINEABLE.contains(codepoints.get(0)) && codepoints.get(codepoints.size() - 1) != COMBINING_ENCLOSING_KEYCAP) { + return new Other(codepoints); + } + return codepoints.size() == 0 ? new Other(codepoints) : new Emoji(codepoints); + } + } + + public static class UnicodeBlocks implements UnicodeSet { + final UnicodeSet[] unicodeSets; + + public UnicodeBlocks(UnicodeSet... sets) { + this.unicodeSets = sets; + } + + @Override + public boolean contains(int codepoint) { + for(UnicodeSet unicodeSet : unicodeSets) { + if (unicodeSet.contains(codepoint)) { + return true; + } + } + return false; + } + } + + public interface UnicodeSet { + boolean contains(int codepoint); + } + + public static class UnicodeList implements UnicodeSet { + + private final List<Integer> list; + + public UnicodeList(Integer... codes) { + this.list = Arrays.asList(codes); + } + + @Override + public boolean contains(int codepoint) { + return this.list.contains(codepoint); + } + } + + + public static class UnicodeRange implements UnicodeSet { + + private final int lower; + private final int upper; + + UnicodeRange(int lower, int upper) { + this.lower = lower; + this.upper = upper; + } + + public boolean contains(int codePoint) { + return codePoint >= lower && codePoint <= upper; + } + } +}
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