package eu.siacs.conversations.utils; import java.util.ArrayList; import java.util.List; 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 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 UnicodeBlocks SYMBOLIZE = new UnicodeBlocks(GEOMETRIC_SHAPES, LATIN_SUPPLEMENT); private static final UnicodeBlocks EMOJIS = new UnicodeBlocks( MISC_SYMBOLS_AND_PICTOGRAPHS, SUPPLEMENTAL_SYMBOLS, EMOTICONS, TRANSPORT_SYMBOLS, MISC_SYMBOLS, DINGBATS, ENCLOSED_ALPHANUMERIC_SUPPLEMENT, MISC_TECHNICAL); private static final int ZWJ = 0x200D; private static final int VARIATION_16 = 0xFE0F; private static final UnicodeRange FITZPATRICK = new UnicodeRange(0x1F3FB,0x1F3FF); private static List parse(String input) { List 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 boolean isEmoji(String input) { List symbols = parse(input); return symbols.size() == 1 && symbols.get(0) == Symbol.EMOJI; } public static boolean isOnlyEmoji(String input) { List symbols = parse(input); for(Symbol symbol : symbols) { if (symbol == Symbol.NON_EMOJI) { return false; } } return symbols.size() > 0; } private enum Symbol { EMOJI, NON_EMOJI } private static class Builder { private final List 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 (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 || EMOJIS.contains(codepoint); } else if (ZWJ == previous) { add = EMOJIS.contains(codepoint) || FITZPATRICK.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; } } private 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 Symbol.NON_EMOJI; } return codepoints.size() == 0 ? Symbol.NON_EMOJI : Symbol.EMOJI; } } public static class UnicodeBlocks { final UnicodeRange[] ranges; public UnicodeBlocks(UnicodeRange... ranges) { this.ranges = ranges; } public boolean contains(int codepoint) { for(UnicodeRange range : ranges) { if (range.contains(codepoint)) { return true; } } return false; } } public static class UnicodeRange { 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; } } }