1 function isEmojiCharacter(substring) {
2 for(var i = 0; i < substring.length; i++) {
3 var hs = substring.charCodeAt(i);
4 if(0xd800 <= hs && hs <= 0xdbff) {
5 if(substring.length > 1) {
6 var ls = substring.charCodeAt(i + 1);
7 var uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
8 if(0x1d000 <= uc && uc <= 0x1f77f) {
9 return true;
10 }
11 }
12 } else if(substring.length > 1) {
13 var ls = substring.charCodeAt(i + 1);
14 if(ls == 0x20e3) {
15 return true;
16 }
17 } else {
18 if(0x2100 <= hs && hs <= 0x27ff) {
19 return true;
20 } else if(0x2B05 <= hs && hs <= 0x2b07) {
21 return true;
22 } else if(0x2934 <= hs && hs <= 0x2935) {
23 return true;
24 } else if(0x3297 <= hs && hs <= 0x3299) {
25 return true;
26 } else if(hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 ||
27 hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b ||
28 hs == 0x2b50) {
29 return true;
30 }
31 }
32 }
33 }
