1package eu.siacs.conversations.utils;
2
3import android.util.Log;
4
5import java.util.ArrayList;
6import java.util.List;
7
8import eu.siacs.conversations.Config;
9
10public class Emoticons {
11
12 private static final UnicodeRange MISC_SYMBOLS_AND_PICTOGRAPHS = new UnicodeRange(0x1F300,0x1F5FF);
13 private static final UnicodeRange SUPPLEMENTAL_SYMBOLS = new UnicodeRange(0x1F900,0x1F9FF);
14 private static final UnicodeRange EMOTICONS = new UnicodeRange(0x1F600,0x1F64F);
15 private static final UnicodeRange TRANSPORT_SYMBOLS = new UnicodeRange(0x1F680,0x1F6FF);
16 private static final UnicodeRange MISC_SYMBOLS = new UnicodeRange(0x2600,0x26FF);
17 private static final UnicodeRange DINGBATS = new UnicodeRange(0x2700,0x27BF);
18 private static final UnicodeRange REGIONAL_INDICATORS = new UnicodeRange(0x1F1E6,0x1F1FF);
19 private static final UnicodeBlocks EMOJIS = new UnicodeBlocks(MISC_SYMBOLS_AND_PICTOGRAPHS,SUPPLEMENTAL_SYMBOLS,EMOTICONS,TRANSPORT_SYMBOLS,MISC_SYMBOLS,DINGBATS);
20 private static final int ZWJ = 0x200D;
21 private static final int VARIATION_16 = 0xFE0F;
22 private static final UnicodeRange FITZPATRICK = new UnicodeRange(0x1F3FB,0x1F3FF);
23
24 private static List<Symbol> parse(String input) {
25 List<Symbol> symbols = new ArrayList<>();
26 Builder builder = new Builder();
27 boolean needsFinalBuild = false;
28 for (int cp, i = 0; i < input.length(); i += Character.charCount(cp)) {
29 cp = input.codePointAt(i);
30 if (builder.offer(cp)) {
31 needsFinalBuild = true;
32 } else {
33 symbols.add(builder.build());
34 builder = new Builder();
35 if (builder.offer(cp)) {
36 needsFinalBuild = true;
37 }
38 }
39 }
40 if (needsFinalBuild) {
41 symbols.add(builder.build());
42 }
43 return symbols;
44 }
45
46 public static boolean isEmoji(String input) {
47 List<Symbol> symbols = parse(input);
48 return symbols.size() == 1 && symbols.get(0) == Symbol.EMOJI;
49 }
50
51 public static boolean isOnlyEmoji(String input) {
52 List<Symbol> symbols = parse(input);
53 for(Symbol symbol : symbols) {
54 if (symbol == Symbol.NON_EMOJI) {
55 return false;
56 }
57 }
58 return symbols.size() > 0;
59 }
60
61 private enum Symbol {
62 EMOJI, NON_EMOJI
63 }
64
65
66 private static class Builder {
67 private final List<Integer> codepoints = new ArrayList<>();
68
69
70 public boolean offer(int codepoint) {
71 if (this.codepoints.size() == 0) {
72 if (REGIONAL_INDICATORS.contains(codepoint)) {
73 codepoints.add(codepoint);
74 return true;
75 } else if (EMOJIS.contains(codepoint) && !FITZPATRICK.contains(codepoint) && codepoint != ZWJ) {
76 codepoints.add(codepoint);
77 return true;
78 }
79 } else {
80 int previous = codepoints.get(codepoints.size() -1);
81 if (REGIONAL_INDICATORS.contains(previous) && REGIONAL_INDICATORS.contains(codepoint)) {
82 if (codepoints.size() == 1) {
83 codepoints.add(codepoint);
84 return true;
85 }
86 } else if (previous == VARIATION_16) {
87 if (isMerger(codepoint)) {
88 codepoints.add(codepoint);
89 return true;
90 }
91 } else if (isMerger(previous)) {
92 if (EMOJIS.contains(codepoint)) {
93 codepoints.add(codepoint);
94 return true;
95 }
96 } else {
97 if (isMerger(codepoint)) {
98 codepoints.add(codepoint);
99 return true;
100 } else if (codepoint == VARIATION_16 && EMOJIS.contains(previous)) {
101 codepoints.add(codepoint);
102 return true;
103 }
104 }
105 }
106 return false;
107 }
108
109 public static boolean isMerger(int codepoint) {
110 return codepoint == ZWJ || FITZPATRICK.contains(codepoint);
111 }
112
113 public Symbol build() {
114 return codepoints.size() == 0 ? Symbol.NON_EMOJI : Symbol.EMOJI;
115 }
116 }
117
118 public static class UnicodeBlocks {
119 final UnicodeRange[] ranges;
120
121 public UnicodeBlocks(UnicodeRange... ranges) {
122 this.ranges = ranges;
123 }
124
125 public boolean contains(int codepoint) {
126 for(UnicodeRange range : ranges) {
127 if (range.contains(codepoint)) {
128 return true;
129 }
130 }
131 return false;
132 }
133 }
134
135
136 public static class UnicodeRange {
137
138 private final int lower;
139 private final int upper;
140
141 UnicodeRange(int lower, int upper) {
142 this.lower = lower;
143 this.upper = upper;
144 }
145
146 public boolean contains(int codePoint) {
147 return codePoint >= lower && codePoint <= upper;
148 }
149 }
150}