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Detect Full-width & Half-width Characters
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/367610/595740/Full-width%20Half-width%20Detect.js
var eaw = {};
if ('undefined' == typeof module) {
window.eastasianwidth = eaw;
} else {
module.exports = eaw;
}
eaw.eastAsianWidth = function(character) {
var x = character.charCodeAt(0);
var y = (character.length == 2) ? character.charCodeAt(1) : 0;
var codePoint = x;
if ((0xD800 <= x && x <= 0xDBFF) && (0xDC00 <= y && y <= 0xDFFF)) {
x &= 0x3FF;
y &= 0x3FF;
codePoint = (x << 10) | y;
codePoint += 0x10000;
}
if ((0x3000 == codePoint) ||
(0xFF01 <= codePoint && codePoint <= 0xFF60) ||
(0xFFE0 <= codePoint && codePoint <= 0xFFE6)) {
return 'F';
}
if ((0x20A9 == codePoint) ||
(0xFF61 <= codePoint && codePoint <= 0xFFBE) ||
(0xFFC2 <= codePoint && codePoint <= 0xFFC7) ||
(0xFFCA <= codePoint && codePoint <= 0xFFCF) ||
(0xFFD2 <= codePoint && codePoint <= 0xFFD7) ||
(0xFFDA <= codePoint && codePoint <= 0xFFDC) ||
(0xFFE8 <= codePoint && codePoint <= 0xFFEE)) {
return 'H';
}
if ((0x1100 <= codePoint && codePoint <= 0x115F) ||
(0x11A3 <= codePoint && codePoint <= 0x11A7) ||
(0x11FA <= codePoint && codePoint <= 0x11FF) ||
(0x2329 <= codePoint && codePoint <= 0x232A) ||
(0x2E80 <= codePoint && codePoint <= 0x2E99) ||
(0x2E9B <= codePoint && codePoint <= 0x2EF3) ||
(0x2F00 <= codePoint && codePoint <= 0x2FD5) ||
(0x2FF0 <= codePoint && codePoint <= 0x2FFB) ||
(0x3001 <= codePoint && codePoint <= 0x303E) ||
(0x3041 <= codePoint && codePoint <= 0x3096) ||
(0x3099 <= codePoint && codePoint <= 0x30FF) ||
(0x3105 <= codePoint && codePoint <= 0x312D) ||
(0x3131 <= codePoint && codePoint <= 0x318E) ||
(0x3190 <= codePoint && codePoint <= 0x31BA) ||
(0x31C0 <= codePoint && codePoint <= 0x31E3) ||
(0x31F0 <= codePoint && codePoint <= 0x321E) ||
(0x3220 <= codePoint && codePoint <= 0x3247) ||
(0x3250 <= codePoint && codePoint <= 0x32FE) ||
(0x3300 <= codePoint && codePoint <= 0x4DBF) ||
(0x4E00 <= codePoint && codePoint <= 0xA48C) ||
(0xA490 <= codePoint && codePoint <= 0xA4C6) ||
(0xA960 <= codePoint && codePoint <= 0xA97C) ||
(0xAC00 <= codePoint && codePoint <= 0xD7A3) ||
(0xD7B0 <= codePoint && codePoint <= 0xD7C6) ||
(0xD7CB <= codePoint && codePoint <= 0xD7FB) ||
(0xF900 <= codePoint && codePoint <= 0xFAFF) ||
(0xFE10 <= codePoint && codePoint <= 0xFE19) ||
(0xFE30 <= codePoint && codePoint <= 0xFE52) ||
(0xFE54 <= codePoint && codePoint <= 0xFE66) ||
(0xFE68 <= codePoint && codePoint <= 0xFE6B) ||
(0x1B000 <= codePoint && codePoint <= 0x1B001) ||
(0x1F200 <= codePoint && codePoint <= 0x1F202) ||
(0x1F210 <= codePoint && codePoint <= 0x1F23A) ||
(0x1F240 <= codePoint && codePoint <= 0x1F248) ||
(0x1F250 <= codePoint && codePoint <= 0x1F251) ||
(0x20000 <= codePoint && codePoint <= 0x2F73F) ||
(0x2B740 <= codePoint && codePoint <= 0x2FFFD) ||
(0x30000 <= codePoint && codePoint <= 0x3FFFD)) {
return 'W';
}
if ((0x0020 <= codePoint && codePoint <= 0x007E) ||
(0x00A2 <= codePoint && codePoint <= 0x00A3) ||
(0x00A5 <= codePoint && codePoint <= 0x00A6) ||
(0x00AC == codePoint) ||
(0x00AF == codePoint) ||
(0x27E6 <= codePoint && codePoint <= 0x27ED) ||
(0x2985 <= codePoint && codePoint <= 0x2986)) {
return 'Na';
}
if ((0x00A1 == codePoint) ||
(0x00A4 == codePoint) ||
(0x00A7 <= codePoint && codePoint <= 0x00A8) ||
(0x00AA == codePoint) ||
(0x00AD <= codePoint && codePoint <= 0x00AE) ||
(0x00B0 <= codePoint && codePoint <= 0x00B4) ||
(0x00B6 <= codePoint && codePoint <= 0x00BA) ||
(0x00BC <= codePoint && codePoint <= 0x00BF) ||
(0x00C6 == codePoint) ||
(0x00D0 == codePoint) ||
(0x00D7 <= codePoint && codePoint <= 0x00D8) ||
(0x00DE <= codePoint && codePoint <= 0x00E1) ||
(0x00E6 == codePoint) ||
(0x00E8 <= codePoint && codePoint <= 0x00EA) ||
(0x00EC <= codePoint && codePoint <= 0x00ED) ||
(0x00F0 == codePoint) ||
(0x00F2 <= codePoint && codePoint <= 0x00F3) ||
(0x00F7 <= codePoint && codePoint <= 0x00FA) ||
(0x00FC == codePoint) ||
(0x00FE == codePoint) ||
(0x0101 == codePoint) ||
(0x0111 == codePoint) ||
(0x0113 == codePoint) ||
(0x011B == codePoint) ||
(0x0126 <= codePoint && codePoint <= 0x0127) ||
(0x012B == codePoint) ||
(0x0131 <= codePoint && codePoint <= 0x0133) ||
(0x0138 == codePoint) ||
(0x013F <= codePoint && codePoint <= 0x0142) ||
(0x0144 == codePoint) ||
(0x0148 <= codePoint && codePoint <= 0x014B) ||
(0x014D == codePoint) ||
(0x0152 <= codePoint && codePoint <= 0x0153) ||
(0x0166 <= codePoint && codePoint <= 0x0167) ||
(0x016B == codePoint) ||
(0x01CE == codePoint) ||
(0x01D0 == codePoint) ||
(0x01D2 == codePoint) ||
(0x01D4 == codePoint) ||
(0x01D6 == codePoint) ||
(0x01D8 == codePoint) ||
(0x01DA == codePoint) ||
(0x01DC == codePoint) ||
(0x0251 == codePoint) ||
(0x0261 == codePoint) ||
(0x02C4 == codePoint) ||
(0x02C7 == codePoint) ||
(0x02C9 <= codePoint && codePoint <= 0x02CB) ||
(0x02CD == codePoint) ||
(0x02D0 == codePoint) ||
(0x02D8 <= codePoint && codePoint <= 0x02DB) ||
(0x02DD == codePoint) ||
(0x02DF == codePoint) ||
(0x0300 <= codePoint && codePoint <= 0x036F) ||
(0x0391 <= codePoint && codePoint <= 0x03A1) ||
(0x03A3 <= codePoint && codePoint <= 0x03A9) ||
(0x03B1 <= codePoint && codePoint <= 0x03C1) ||
(0x03C3 <= codePoint && codePoint <= 0x03C9) ||
(0x0401 == codePoint) ||
(0x0410 <= codePoint && codePoint <= 0x044F) ||
(0x0451 == codePoint) ||
(0x2010 == codePoint) ||
(0x2013 <= codePoint && codePoint <= 0x2016) ||
(0x2018 <= codePoint && codePoint <= 0x2019) ||
(0x201C <= codePoint && codePoint <= 0x201D) ||
(0x2020 <= codePoint && codePoint <= 0x2022) ||
(0x2024 <= codePoint && codePoint <= 0x2027) ||
(0x2030 == codePoint) ||
(0x2032 <= codePoint && codePoint <= 0x2033) ||
(0x2035 == codePoint) ||
(0x203B == codePoint) ||
(0x203E == codePoint) ||
(0x2074 == codePoint) ||
(0x207F == codePoint) ||
(0x2081 <= codePoint && codePoint <= 0x2084) ||
(0x20AC == codePoint) ||
(0x2103 == codePoint) ||
(0x2105 == codePoint) ||
(0x2109 == codePoint) ||
(0x2113 == codePoint) ||
(0x2116 == codePoint) ||
(0x2121 <= codePoint && codePoint <= 0x2122) ||
(0x2126 == codePoint) ||
(0x212B == codePoint) ||
(0x2153 <= codePoint && codePoint <= 0x2154) ||
(0x215B <= codePoint && codePoint <= 0x215E) ||
(0x2160 <= codePoint && codePoint <= 0x216B) ||
(0x2170 <= codePoint && codePoint <= 0x2179) ||
(0x2189 == codePoint) ||
(0x2190 <= codePoint && codePoint <= 0x2199) ||
(0x21B8 <= codePoint && codePoint <= 0x21B9) ||
(0x21D2 == codePoint) ||
(0x21D4 == codePoint) ||
(0x21E7 == codePoint) ||
(0x2200 == codePoint) ||
(0x2202 <= codePoint && codePoint <= 0x2203) ||
(0x2207 <= codePoint && codePoint <= 0x2208) ||
(0x220B == codePoint) ||
(0x220F == codePoint) ||
(0x2211 == codePoint) ||
(0x2215 == codePoint) ||
(0x221A == codePoint) ||
(0x221D <= codePoint && codePoint <= 0x2220) ||
(0x2223 == codePoint) ||
(0x2225 == codePoint) ||
(0x2227 <= codePoint && codePoint <= 0x222C) ||
(0x222E == codePoint) ||
(0x2234 <= codePoint && codePoint <= 0x2237) ||
(0x223C <= codePoint && codePoint <= 0x223D) ||
(0x2248 == codePoint) ||
(0x224C == codePoint) ||
(0x2252 == codePoint) ||
(0x2260 <= codePoint && codePoint <= 0x2261) ||
(0x2264 <= codePoint && codePoint <= 0x2267) ||
(0x226A <= codePoint && codePoint <= 0x226B) ||
(0x226E <= codePoint && codePoint <= 0x226F) ||
(0x2282 <= codePoint && codePoint <= 0x2283) ||
(0x2286 <= codePoint && codePoint <= 0x2287) ||
(0x2295 == codePoint) ||
(0x2299 == codePoint) ||
(0x22A5 == codePoint) ||
(0x22BF == codePoint) ||
(0x2312 == codePoint) ||
(0x2460 <= codePoint && codePoint <= 0x24E9) ||
(0x24EB <= codePoint && codePoint <= 0x254B) ||
(0x2550 <= codePoint && codePoint <= 0x2573) ||
(0x2580 <= codePoint && codePoint <= 0x258F) ||
(0x2592 <= codePoint && codePoint <= 0x2595) ||
(0x25A0 <= codePoint && codePoint <= 0x25A1) ||
(0x25A3 <= codePoint && codePoint <= 0x25A9) ||
(0x25B2 <= codePoint && codePoint <= 0x25B3) ||
(0x25B6 <= codePoint && codePoint <= 0x25B7) ||
(0x25BC <= codePoint && codePoint <= 0x25BD) ||
(0x25C0 <= codePoint && codePoint <= 0x25C1) ||
(0x25C6 <= codePoint && codePoint <= 0x25C8) ||
(0x25CB == codePoint) ||
(0x25CE <= codePoint && codePoint <= 0x25D1) ||
(0x25E2 <= codePoint && codePoint <= 0x25E5) ||
(0x25EF == codePoint) ||
(0x2605 <= codePoint && codePoint <= 0x2606) ||
(0x2609 == codePoint) ||
(0x260E <= codePoint && codePoint <= 0x260F) ||
(0x2614 <= codePoint && codePoint <= 0x2615) ||
(0x261C == codePoint) ||
(0x261E == codePoint) ||
(0x2640 == codePoint) ||
(0x2642 == codePoint) ||
(0x2660 <= codePoint && codePoint <= 0x2661) ||
(0x2663 <= codePoint && codePoint <= 0x2665) ||
(0x2667 <= codePoint && codePoint <= 0x266A) ||
(0x266C <= codePoint && codePoint <= 0x266D) ||
(0x266F == codePoint) ||
(0x269E <= codePoint && codePoint <= 0x269F) ||
(0x26BE <= codePoint && codePoint <= 0x26BF) ||
(0x26C4 <= codePoint && codePoint <= 0x26CD) ||
(0x26CF <= codePoint && codePoint <= 0x26E1) ||
(0x26E3 == codePoint) ||
(0x26E8 <= codePoint && codePoint <= 0x26FF) ||
(0x273D == codePoint) ||
(0x2757 == codePoint) ||
(0x2776 <= codePoint && codePoint <= 0x277F) ||
(0x2B55 <= codePoint && codePoint <= 0x2B59) ||
(0x3248 <= codePoint && codePoint <= 0x324F) ||
(0xE000 <= codePoint && codePoint <= 0xF8FF) ||
(0xFE00 <= codePoint && codePoint <= 0xFE0F) ||
(0xFFFD == codePoint) ||
(0x1F100 <= codePoint && codePoint <= 0x1F10A) ||
(0x1F110 <= codePoint && codePoint <= 0x1F12D) ||
(0x1F130 <= codePoint && codePoint <= 0x1F169) ||
(0x1F170 <= codePoint && codePoint <= 0x1F19A) ||
(0xE0100 <= codePoint && codePoint <= 0xE01EF) ||
(0xF0000 <= codePoint && codePoint <= 0xFFFFD) ||
(0x100000 <= codePoint && codePoint <= 0x10FFFD)) {
return 'A';
}
return 'N';
};
eaw.characterLength = function(character) {
var code = this.eastAsianWidth(character);
if (code == 'F' || code == 'W' || code == 'A') {
return 2;
} else {
return 1;
}
};
// Split a string considering surrogate-pairs.
function stringToArray(string) {
return string.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]|[^\uD800-\uDFFF]/g) || [];
}
eaw.length = function(string) {
var characters = stringToArray(string);
var len = 0;
for (var i = 0; i < characters.length; i++) {
len = len + this.characterLength(characters[i]);
}
return len;
};
eaw.slice = function(text, start, end) {
textLen = eaw.length(text)
start = start ? start : 0;
end = end ? end : 1;
if (start < 0) {
start = textLen + start;
}
if (end < 0) {
end = textLen + end;
}
var result = '';
var eawLen = 0;
var chars = stringToArray(text);
for (var i = 0; i < chars.length; i++) {
var char = chars[i];
var charLen = eaw.length(char);
if (eawLen >= start - (charLen == 2 ? 1 : 0)) {
if (eawLen + charLen <= end) {
result += char;
} else {
break;
}
}
eawLen += charLen;
}
return result;
};