vue-blocklink
Version:
Vue support for the Blockchain Link browser extension
298 lines (251 loc) • 7.61 kB
JavaScript
const {PI, cos, sin, abs, sqrt, pow, round, random, atan2} = Math
const HALF_PI = 0.5 * PI
const TAU = 2 * PI
const TO_RAD = PI / 180
const floor = n => n | 0
const rand = n => n * random()
const randIn = (min, max) => rand(max - min) + min
const randRange = n => n - rand(2 * n)
const fadeIn = (t, m) => t / m
const fadeOut = (t, m) => (m - t) / m
const fadeInOut = (t, m) => {
const hm = 0.5 * m
return abs((t + hm) % m - hm) / (hm)
}
const dist = (x1, y1, x2, y2) => sqrt(pow(x2 - x1, 2) + pow(y2 - y1, 2))
const angle = (x1, y1, x2, y2) => atan2(y2 - y1, x2 - x1)
const lerp = (n1, n2, speed) => (1 - speed) * n1 + speed * n2
const shuffle = (array) => {
let currentIndex = array.length
let randomIndex
// While there remain elements to shuffle...
while (currentIndex !== 0) {
// Pick a remaining element...
randomIndex = Math.floor(Math.random() * currentIndex)
currentIndex--;
// And swap it with the current element.
[array[currentIndex], array[randomIndex]] = [
array[randomIndex], array[currentIndex]]
}
return array
}
function Base64() {
this._keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
this.encode = (input) => {
let output = ""
let chr1
let chr2
let chr3
let enc1
let enc2
let enc3
let enc4
let i = 0
while (i < input.length) {
chr1 = input.charCodeAt(i++)
chr2 = input.charCodeAt(i++)
chr3 = input.charCodeAt(i++)
enc1 = chr1 >> 2
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4)
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6)
enc4 = chr3 & 63
if (isNaN(chr2)) {
enc3 = enc4 = 64
} else if (isNaN(chr3)) {
enc4 = 64
}
output = output +
this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4)
}
return output
}
this.encodeIgnoreUtf8 = (inputBytes) => {
let output = ""
let chr1
let chr2
let chr3
let enc1
let enc2
let enc3
let enc4
let i = 0
while (i < inputBytes.length) {
chr1 = inputBytes[i++]
chr2 = inputBytes[i++]
chr3 = inputBytes[i++]
enc1 = chr1 >> 2
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4)
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6)
enc4 = chr3 & 63
if (isNaN(chr2)) {
enc3 = enc4 = 64
} else if (isNaN(chr3)) {
enc4 = 64
}
output = output +
this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4)
}
return output
}
this.decode = (input) => {
let output = ""
let chr1
let chr2
let chr3
let enc1
let enc2
let enc3
let enc4
let i = 0
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "")
while (i < input.length) {
enc1 = this._keyStr.indexOf(input.charAt(i++))
enc2 = this._keyStr.indexOf(input.charAt(i++))
enc3 = this._keyStr.indexOf(input.charAt(i++))
enc4 = this._keyStr.indexOf(input.charAt(i++))
chr1 = (enc1 << 2) | (enc2 >> 4)
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2)
chr3 = ((enc3 & 3) << 6) | enc4
output = output + String.fromCharCode(chr1)
if (enc3 != 64) {
output = output + String.fromCharCode(chr2)
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3)
}
}
return this._utf8_decode(output)
}
this.decodeToByteArray = (input) => {
let output = ""
let chr1
let chr2
let chr3
let enc1
let enc2
let enc3
let enc4
let i = 0
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "")
while (i < input.length) {
enc1 = this._keyStr.indexOf(input.charAt(i++))
enc2 = this._keyStr.indexOf(input.charAt(i++))
enc3 = this._keyStr.indexOf(input.charAt(i++))
enc4 = this._keyStr.indexOf(input.charAt(i++))
chr1 = (enc1 << 2) | (enc2 >> 4)
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2)
chr3 = ((enc3 & 3) << 6) | enc4
output = output + String.fromCharCode(chr1)
if (enc3 !== 64) {
output = output + String.fromCharCode(chr2)
}
if (enc4 !== 64) {
output = output + String.fromCharCode(chr3)
}
}
return this._out2ByteArray(output)
}
this._out2ByteArray = (utftext) => {
const byteArray = new Array(utftext.length)
let i = 0
let c = 0
while (i < utftext.length) {
c = utftext.charCodeAt(i)
byteArray[i] = c
i++
}
return byteArray
}
this._utf8_encode = (string) => {
string = string.replace(/\r\n/g, "\n")
let utftext = ""
for (let n = 0; n < string.length; n++) {
const c = string.charCodeAt(n)
if (c < 128) {
utftext += String.fromCharCode(c)
} else if ((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192)
utftext += String.fromCharCode((c & 63) | 128)
} else {
utftext += String.fromCharCode((c >> 12) | 224)
utftext += String.fromCharCode(((c >> 6) & 63) | 128)
utftext += String.fromCharCode((c & 63) | 128)
}
}
return utftext
}
this._utf8_decode = (utftext) => {
let string = ""
let i = 0
let c = 0
let c2 = 0
let c3 = 0
while (i < utftext.length) {
c = utftext.charCodeAt(i)
if (c < 128) {
string += String.fromCharCode(c)
i++
} else if ((c > 191) && (c < 224)) {
c2 = utftext.charCodeAt(i + 1)
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63))
i += 2
} else {
c2 = utftext.charCodeAt(i + 1)
c3 = utftext.charCodeAt(i + 2)
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63))
i += 3
}
}
return string
}
}
function toFixedBn(x) {
if (Math.abs(x) < 1.0) {
let e = parseInt(x.toString().split('e-')[1]);
if (e) {
x *= Math.pow(10, e - 1);
x = '0.' + (new Array(e)).join('0') + x.toString().substring(2);
}
} else {
let e = parseInt(x.toString().split('+')[1]);
if (e > 20) {
e -= 20;
x /= Math.pow(10, e);
x += (new Array(e + 1)).join('0');
}
}
return x;
}
function toWad(x) {
return toFixedBn(x * 1e18)
}
export {
shuffle,
Base64,
PI,
cos,
sin,
abs,
sqrt,
pow,
round,
random,
atan2,
HALF_PI,
TAU,
TO_RAD,
toFixedBn,
toWad,
floor,
rand,
randIn,
randRange,
fadeIn,
fadeInOut,
fadeOut,
dist,
angle,
lerp
}