mirror of
https://github.com/idanoo/GoScrobble.git
synced 2024-11-24 17:35:16 +00:00
310 lines
8.1 KiB
JavaScript
310 lines
8.1 KiB
JavaScript
/* eslint no-bitwise: "off", max-statements: "off", max-lines: "off" */
|
|
|
|
// Taken from: https://github.com/walling/unorm/blob/master/lib/unorm.js
|
|
|
|
/*
|
|
* UnicodeNormalizer 1.0.0
|
|
* Copyright (c) 2008 Matsuza
|
|
* Dual licensed under the MIT (MIT-LICENSE.txt) and
|
|
* GPL (GPL-LICENSE.txt) licenses.
|
|
* $Date: 2008-06-05 16:44:17 +0200 (Thu, 05 Jun 2008) $
|
|
* $Rev: 13309 $
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
var primitiveSet = require("../../../object/primitive-set")
|
|
, validValue = require("../../../object/valid-value")
|
|
, data = require("./_data");
|
|
|
|
var floor = Math.floor
|
|
, forms = primitiveSet("NFC", "NFD", "NFKC", "NFKD")
|
|
, DEFAULT_FEATURE = [null, 0, {}]
|
|
, CACHE_THRESHOLD = 10
|
|
, SBase = 0xac00
|
|
, LBase = 0x1100
|
|
, VBase = 0x1161
|
|
, TBase = 0x11a7
|
|
, LCount = 19
|
|
, VCount = 21
|
|
, TCount = 28
|
|
, NCount = VCount * TCount
|
|
, SCount = LCount * NCount
|
|
, UChar
|
|
, cache = {}
|
|
, cacheCounter = []
|
|
, fromCache
|
|
, fromData
|
|
, fromCpOnly
|
|
, fromRuleBasedJamo
|
|
, fromCpFilter
|
|
, strategies
|
|
, UCharIterator
|
|
, RecursDecompIterator
|
|
, DecompIterator
|
|
, CompIterator
|
|
, createIterator
|
|
, normalize;
|
|
|
|
UChar = function (cp, feature) {
|
|
this.codepoint = cp;
|
|
this.feature = feature;
|
|
};
|
|
|
|
// Strategies
|
|
(function () { for (var i = 0; i <= 0xff; ++i) cacheCounter[i] = 0; })();
|
|
|
|
fromCache = function (nextStep, cp, needFeature) {
|
|
var ret = cache[cp];
|
|
if (!ret) {
|
|
ret = nextStep(cp, needFeature);
|
|
if (Boolean(ret.feature) && ++cacheCounter[(cp >> 8) & 0xff] > CACHE_THRESHOLD) {
|
|
cache[cp] = ret;
|
|
}
|
|
}
|
|
return ret;
|
|
};
|
|
|
|
fromData = function (next, cp) {
|
|
var hash = cp & 0xff00, dunit = UChar.udata[hash] || {}, feature = dunit[cp];
|
|
return feature ? new UChar(cp, feature) : new UChar(cp, DEFAULT_FEATURE);
|
|
};
|
|
fromCpOnly = function (next, cp, needFeature) {
|
|
return needFeature ? next(cp, needFeature) : new UChar(cp, null);
|
|
};
|
|
|
|
fromRuleBasedJamo = function (next, cp, needFeature) {
|
|
var char, base, i, arr, SIndex, TIndex, feature, j;
|
|
if (cp < LBase || (LBase + LCount <= cp && cp < SBase) || SBase + SCount < cp) {
|
|
return next(cp, needFeature);
|
|
}
|
|
if (LBase <= cp && cp < LBase + LCount) {
|
|
char = {};
|
|
base = (cp - LBase) * VCount;
|
|
for (i = 0; i < VCount; ++i) {
|
|
char[VBase + i] = SBase + TCount * (i + base);
|
|
}
|
|
arr = new Array(3);
|
|
arr[2] = char;
|
|
return new UChar(cp, arr);
|
|
}
|
|
|
|
SIndex = cp - SBase;
|
|
TIndex = SIndex % TCount;
|
|
feature = [];
|
|
if (TIndex === 0) {
|
|
feature[0] = [LBase + floor(SIndex / NCount), VBase + floor((SIndex % NCount) / TCount)];
|
|
feature[2] = {};
|
|
for (j = 1; j < TCount; ++j) {
|
|
feature[2][TBase + j] = cp + j;
|
|
}
|
|
} else {
|
|
feature[0] = [SBase + SIndex - TIndex, TBase + TIndex];
|
|
}
|
|
return new UChar(cp, feature);
|
|
};
|
|
|
|
fromCpFilter = function (next, cp, needFeature) {
|
|
return cp < 60 || (cp > 13311 && cp < 42607)
|
|
? new UChar(cp, DEFAULT_FEATURE)
|
|
: next(cp, needFeature);
|
|
};
|
|
|
|
strategies = [fromCpFilter, fromCache, fromCpOnly, fromRuleBasedJamo, fromData];
|
|
|
|
UChar.fromCharCode = strategies.reduceRight(function (next, strategy) {
|
|
return function (cp, needFeature) { return strategy(next, cp, needFeature); };
|
|
}, null);
|
|
|
|
UChar.isHighSurrogate = function (cp) { return cp >= 0xd800 && cp <= 0xdbff; };
|
|
UChar.isLowSurrogate = function (cp) { return cp >= 0xdc00 && cp <= 0xdfff; };
|
|
|
|
UChar.prototype.prepFeature = function () {
|
|
if (!this.feature) {
|
|
this.feature = UChar.fromCharCode(this.codepoint, true).feature;
|
|
}
|
|
};
|
|
|
|
UChar.prototype.toString = function () {
|
|
var num;
|
|
if (this.codepoint < 0x10000) return String.fromCharCode(this.codepoint);
|
|
num = this.codepoint - 0x10000;
|
|
return String.fromCharCode(floor(num / 0x400) + 0xd800, (num % 0x400) + 0xdc00);
|
|
};
|
|
|
|
UChar.prototype.getDecomp = function () {
|
|
this.prepFeature();
|
|
return this.feature[0] || null;
|
|
};
|
|
|
|
UChar.prototype.isCompatibility = function () {
|
|
this.prepFeature();
|
|
return Boolean(this.feature[1]) && this.feature[1] & (1 << 8);
|
|
};
|
|
UChar.prototype.isExclude = function () {
|
|
this.prepFeature();
|
|
return Boolean(this.feature[1]) && this.feature[1] & (1 << 9);
|
|
};
|
|
UChar.prototype.getCanonicalClass = function () {
|
|
this.prepFeature();
|
|
return this.feature[1] ? this.feature[1] & 0xff : 0;
|
|
};
|
|
UChar.prototype.getComposite = function (following) {
|
|
var cp;
|
|
this.prepFeature();
|
|
if (!this.feature[2]) return null;
|
|
cp = this.feature[2][following.codepoint];
|
|
return cp ? UChar.fromCharCode(cp) : null;
|
|
};
|
|
|
|
UCharIterator = function (str) {
|
|
this.str = str;
|
|
this.cursor = 0;
|
|
};
|
|
UCharIterator.prototype.next = function () {
|
|
if (Boolean(this.str) && this.cursor < this.str.length) {
|
|
var cp = this.str.charCodeAt(this.cursor++), d;
|
|
if (
|
|
UChar.isHighSurrogate(cp) &&
|
|
this.cursor < this.str.length &&
|
|
UChar.isLowSurrogate((d = this.str.charCodeAt(this.cursor)))
|
|
) {
|
|
cp = (cp - 0xd800) * 0x400 + (d - 0xdc00) + 0x10000;
|
|
++this.cursor;
|
|
}
|
|
return UChar.fromCharCode(cp);
|
|
}
|
|
this.str = null;
|
|
return null;
|
|
};
|
|
|
|
RecursDecompIterator = function (it, cano) {
|
|
this.it = it;
|
|
this.canonical = cano;
|
|
this.resBuf = [];
|
|
};
|
|
|
|
RecursDecompIterator.prototype.next = function () {
|
|
var recursiveDecomp, uchar;
|
|
recursiveDecomp = function (cano, ucharLoc) {
|
|
var decomp = ucharLoc.getDecomp(), ret, i, a, j;
|
|
if (Boolean(decomp) && !(cano && ucharLoc.isCompatibility())) {
|
|
ret = [];
|
|
for (i = 0; i < decomp.length; ++i) {
|
|
a = recursiveDecomp(cano, UChar.fromCharCode(decomp[i]));
|
|
// Ret.concat(a); //<-why does not this work?
|
|
// following block is a workaround.
|
|
for (j = 0; j < a.length; ++j) ret.push(a[j]);
|
|
}
|
|
return ret;
|
|
}
|
|
return [ucharLoc];
|
|
};
|
|
if (this.resBuf.length === 0) {
|
|
uchar = this.it.next();
|
|
if (!uchar) return null;
|
|
this.resBuf = recursiveDecomp(this.canonical, uchar);
|
|
}
|
|
return this.resBuf.shift();
|
|
};
|
|
|
|
DecompIterator = function (it) {
|
|
this.it = it;
|
|
this.resBuf = [];
|
|
};
|
|
|
|
DecompIterator.prototype.next = function () {
|
|
var cc, uchar, inspt, uchar2, cc2;
|
|
if (this.resBuf.length === 0) {
|
|
do {
|
|
uchar = this.it.next();
|
|
if (!uchar) break;
|
|
cc = uchar.getCanonicalClass();
|
|
inspt = this.resBuf.length;
|
|
if (cc !== 0) {
|
|
for (inspt; inspt > 0; --inspt) {
|
|
uchar2 = this.resBuf[inspt - 1];
|
|
cc2 = uchar2.getCanonicalClass();
|
|
// eslint-disable-next-line max-depth
|
|
if (cc2 <= cc) break;
|
|
}
|
|
}
|
|
this.resBuf.splice(inspt, 0, uchar);
|
|
} while (cc !== 0);
|
|
}
|
|
return this.resBuf.shift();
|
|
};
|
|
|
|
CompIterator = function (it) {
|
|
this.it = it;
|
|
this.procBuf = [];
|
|
this.resBuf = [];
|
|
this.lastClass = null;
|
|
};
|
|
|
|
CompIterator.prototype.next = function () {
|
|
var uchar, starter, composite, cc;
|
|
while (this.resBuf.length === 0) {
|
|
uchar = this.it.next();
|
|
if (!uchar) {
|
|
this.resBuf = this.procBuf;
|
|
this.procBuf = [];
|
|
break;
|
|
}
|
|
if (this.procBuf.length === 0) {
|
|
this.lastClass = uchar.getCanonicalClass();
|
|
this.procBuf.push(uchar);
|
|
} else {
|
|
starter = this.procBuf[0];
|
|
composite = starter.getComposite(uchar);
|
|
cc = uchar.getCanonicalClass();
|
|
if (Boolean(composite) && (this.lastClass < cc || this.lastClass === 0)) {
|
|
this.procBuf[0] = composite;
|
|
} else {
|
|
if (cc === 0) {
|
|
this.resBuf = this.procBuf;
|
|
this.procBuf = [];
|
|
}
|
|
this.lastClass = cc;
|
|
this.procBuf.push(uchar);
|
|
}
|
|
}
|
|
}
|
|
return this.resBuf.shift();
|
|
};
|
|
|
|
createIterator = function (mode, str) {
|
|
switch (mode) {
|
|
case "NFD":
|
|
return new DecompIterator(new RecursDecompIterator(new UCharIterator(str), true));
|
|
case "NFKD":
|
|
return new DecompIterator(new RecursDecompIterator(new UCharIterator(str), false));
|
|
case "NFC":
|
|
return new CompIterator(
|
|
new DecompIterator(new RecursDecompIterator(new UCharIterator(str), true))
|
|
);
|
|
case "NFKC":
|
|
return new CompIterator(
|
|
new DecompIterator(new RecursDecompIterator(new UCharIterator(str), false))
|
|
);
|
|
default:
|
|
throw new Error(mode + " is invalid");
|
|
}
|
|
};
|
|
normalize = function (mode, str) {
|
|
var it = createIterator(mode, str), ret = "", uchar;
|
|
while ((uchar = it.next())) ret += uchar.toString();
|
|
return ret;
|
|
};
|
|
|
|
/* Unicode data */
|
|
UChar.udata = data;
|
|
|
|
module.exports = function (/* Form*/) {
|
|
var str = String(validValue(this)), form = arguments[0];
|
|
if (form === undefined) form = "NFC";
|
|
else form = String(form);
|
|
if (!forms[form]) throw new RangeError("Invalid normalization form: " + form);
|
|
return normalize(form, str);
|
|
};
|