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Elements.js
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Elements.js
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// jshint esversion: 11
const Elements = {};
// Elements: Magnogen's personal JavaScript Library
// You can use it too, I like sharing things
// If you like any of this, or dislike it to the point of wanting to make it better,
// please submit a pull request at https://github.com/Magnogen/Elements
// Colour
// Creating and editing colours
// RGBA, HSLA and CMYA are supported
// Might include CNS in future too
// https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.5/grstatgraph/p0edl20cvxxmm9n1i9ht3n21eict.htm
// ^ Helpful resource
{
// hsl2rgb() and rgb2hsl() adapted from Kamil Kiełczewski's answer from StackOverflow
// https://stackoverflow.com/a/64090995
// h[0-360] s[0-1] l[0-1] -> r[0-255] g[0-255] b[0-255]
const hsl2rgb = (h=0, s=1, l=0.5) => {
let a = s * Math.min(l, 1-l);
let f = (n, k=(n+(h+360)/30)%12) => l - a * Math.max(Math.min(k-3, 9-k, 1), -1);
return [255*f(0), 255*f(8), 255*f(4)]
}
// r[0-255] g[0-255] b[0-255] -> h[0-360] s[0-1] l[0-1]
const rgb2hsl = (_r=0, _g=0, _b=0) => {
let [r, g, b] = [_r/255, _g/255, _b/255];
let v=Math.max(r,g,b), c=v-Math.min(r,g,b), f=(1-Math.abs(v+v-c-1));
let h= c && ((v==r) ? (g-b)/c : ((v==g) ? 2+(b-r)/c : 4+(r-g)/c));
return [60*(h<0?h+6:h), f ? c/f : 0, (v+v-c)/2]
}
// c[0-255] m[0-255] y[0-255] <-> r[0-255] g[0-255] b[0-255]
const cmy2rgb = (c=0, m=0, y=0) => [ 255-c, 255-m, 255-y ];
const rgb2cmy = cmy2rgb;
Elements.Colour = class Colour {
constructor(type, ...data) {
this.r = 0; this.g = 0; this.b = 0; this.a = 255;
if (typeof type == 'string') {
if (!['rgb','rgba','hsl','hsla','cmy','cmya'].includes(type.toLowerCase())) throw {
name: 'Elements.Colour',
message: `Expected Colour Type and received ${ type }`
};
else if (['hsl', 'hsla'].includes(type)) this.hsla = data;
else if (['cmy', 'cmya'].includes(type)) this.cmya = data;
else this.rgba = data;
} else if (typeof type === 'object' && type instanceof Colour) {
this.rgba = type.rgba;
}
}
toRGB() { return `rgba(${this.rgba.map(n => 0|n).join(', ')})` }
toHex() { return '#'+this.rgba.map(c => (0|c).toString(16).padStart(2,'0')).join('') }
// this.r, this.g, this.b, and this.a are all actual values
get rgb() { return [this.r, this.g, this.b] }
get rgba() { return [this.r, this.g, this.b, this.a] }
set rgb(data) { this.rgba = [data, this.a] }
set rgba(_data) {
let data = _data.flat(Infinity);
this.r = data[0]===undefined ? this.r : data[0];
this.g = data[1]===undefined ? this.g : data[1];
this.b = data[2]===undefined ? this.b : data[2];
this.a = data[3]===undefined ? this.a : data[3];
}
get h() { return this.hsl[0] }
get s() { return this.hsl[1] }
get l() { return this.hsl[2] }
set h(hue) { let b4 = this.hsla; this.hsla = [hue , b4[1], b4[2], b4[3]] }
set s(sat) { let b4 = this.hsla; this.hsla = [b4[0], sat , b4[2], b4[3]] }
set l(lig) { let b4 = this.hsla; this.hsla = [b4[0], b4[1], lig , b4[3]] }
get hsl() { return rgb2hsl(this.r, this.g, this.b) }
get hsla() { return [...this.hsl, this.a] }
set hsl(data) { this.hsla = [...data, this.a]; }
set hsla(_data) {
let data = _data.flat(Infinity);
let b4 = this.hsl;
data[0] = data[0] ? data[0] : b4[0];
data[1] = data[1] ? data[1] : b4[1];
data[2] = data[2] ? data[2] : b4[2];
data = [...hsl2rgb(data[0], data[1], data[2]), data[3]];
this.r = data[0];
this.g = data[1];
this.b = data[2];
this.a = data[3]===undefined ? this.a : data[3];
}
get c() { return this.cmy[0] }
get m() { return this.cmy[1] }
get y() { return this.cmy[2] }
set c(cyn) { let b4 = this.cmya; this.cmya = [cyn , b4[1], b4[2], b4[3]] }
set m(mag) { let b4 = this.cmya; this.cmya = [b4[0], mag , b4[2], b4[3]] }
set y(yel) { let b4 = this.cmya; this.cmya = [b4[0], b4[1], yel , b4[3]] }
get cmy() { return [255-this.r, 255-this.g, 255-this.b] }
set cmy(data) { this.cmya = [data, this.a] }
get cmya() { return [...this.cmy, this.a] }
set cmya(_data) {
let data = _data.flat(Infinity);
this.r = data[0]===undefined ? this.r : 255-data[0];
this.g = data[1]===undefined ? this.g : 255-data[1];
this.b = data[2]===undefined ? this.b : 255-data[2];
this.a = data[3]===undefined ? this.a : data[3];
}
}
}
// Finite State Machine
// all things finite-statey
{
Elements.FSM = class FSM {
#state;
#states;
#event_defaults;
constructor() {
this.#state = undefined;
this.#states = {};
this.#event_defaults = {};
}
addState(name) {
if (this.#state == undefined) this.#state = name;
this.#states[name] = true;
this[name] = { ...this.#event_defaults }
}
addEvent(name, normal = ()=>undefined) {
this.#event_defaults[name] = normal;
for (let state of Object.keys(this.#states))
this[state][name] = normal;
}
call(event, ...args) {
return this[this.#state][event](...args);
}
set(state) {
if (!this.#states[state]) return false;
this.#state = state;
return true;
}
}
}
// Limit
// Restricting numbers between two values
// Clamp, Wrap, Fold and Sigmoid are supported
{
Elements.Limit = class Limit {
constructor(min, max) {
[this.min, this.max] = min < max ? [min, max] : [max, min];
}
clamp(n) {
if (n < this.min) return this.min;
if (n > this.max) return this.max;
return n;
}
wrap(n) {
let N = n;
while (N < this.min) N += this.max-this.min;
while (N > this.max) N -= this.max-this.min;
return N;
}
fold(n) {
let N = (n-this.min) % (2*(this.max-this.min)) + this.min;
if (N > this.max) return 2*this.max - N;
return N;
}
sigmoid(n) {
let diff = this.max-this.min;
return diff / (1 + Math.exp(4 * (this.min-n) / diff + 2)) + this.min;
}
};
Elements.Limit.clamp = (n, a, b) => {
if (b < a) return Elements.Limit.clamp(n, b, a);
if (n < a) return a;
if (n > b) return b;
return n;
};
Elements.Limit.wrap = (n, a, b) => {
if (b < a) return Elements.Limit.wrap(n, b, a);
let N = n;
while (N < a) N += b-a;
while (N > b) N -= b-a;
return N;
};
Elements.Limit.fold = (n, a, b) => {
if (b < a) return Elements.Limit.fold(n, b, a);
let N = (n - a) % (2 * (b - a)) + a;
if (N > b) return 2 * b - N;
return N;
};
Elements.Limit.sigmoid = (n, a, b) => {
if (b < a) return Elements.Limit.sigmoid(n, b, a);
return (b - a) / (1 + Math.exp(4 * (a - n) / (b - a) + 2)) + a;
};
}
// Meal
// Consuming a string
// Good for programming languages and syntax highlighting and parsing and such
{
Elements.Meal = class Meal {
constructor(plate, tokensOnly=false) {
if (typeof plate != 'string') throw {
name: 'Elements.Meal',
message: `Expected String and received ${ typeof plate }`
};
this.plate = plate;
this.tokensOnly = tokensOnly;
this.index = 0;
this.line = 0;
this.column = 0;
}
finished() { return this.plate.length == this.index }
first(check) {
if (this.finished()) return;
if (typeof check == 'string')
return this.plate.substring(this.index, this.index+check.length) == check;
if (typeof check == 'number')
return this.plate.substring(this.index, this.index+check+1);
if (typeof check == 'undefined')
return this.plate[this.index];
}
leftover() {
return this.plate.substring(this.index, this.plate.length);
}
eat(edible, tokensOnly=this.tokensOnly) {
if (typeof edible == 'string') {
if (!this.first(edible)) return null;
this.index += edible.length;
const lines = edible.split('\n');
this.line += lines.length - 1;
if (lines.length > 1) this.column = 0;
this.column += lines[lines.length-1].length;
return edible;
}
else if (typeof edible == 'function') {
const copy = new Elements.Meal(this.plate, tokensOnly);
copy.index = this.index;
copy.line = this.line;
copy.column = this.column;
const out = edible(copy);
if (out === null) return null;
this.index = copy.index;
this.line = copy.line;
this.column = copy.column;
return out;
}
}
}
Elements.Meal.any = (...edibles) => food => {
for (let edible of edibles) {
const value = food.eat(edible);
if (value != null) return value;
}
return null;
}
Elements.Meal.around = (edible, start, end) => food => {
const value = food.eat(edible);
if (value == null) return null;
return start + value + end;
}
Elements.Meal.chain = (...edibles) => food => {
let content = [], current;
for (let edible of edibles) {
current = food.eat(edible)
if (current == null) return null;
else content.push(current);
}
return food.tokensOnly ? content : content.join('');
}
Elements.Meal.many = edible => food => {
let content = [], current;
while (true) {
current = food.eat(edible);
if (current === null) return null;
content.push(current);
}
if (content.length == 0) return null;
return food.tokensOnly ? content : content.join('');
}
Elements.Meal.map = (edible, mapper) => food => {
const value = food.eat(edible);
if (value == null) return null;
if (Array.isArray(value)) return mapper(...value);
return mapper(value);
};
Elements.Meal.n = (edible, amount) => food => {
let content = [], current;
for (let i = 0; i < amount; i++) {
current = food.eat(edible);
if (current === null) return null;
content.push(current);
}
return food.tokensOnly ? content : content.join('');
}
Elements.Meal.need = (edible, messenger) => food => {
const content = food.eat(edible)
if (content == null) throw {
name: 'Elements.Meal.Need',
message: typeof messenger == 'function' ? messenger(food) : messenger
};
return content;
};
Elements.Meal.not = edible => food => food.eat(edible) == null ? food.eat(food.first()) : null;
Elements.Meal.ignore = edible => food => food.eat(edible) == null ? null : '';
Elements.Meal.maybe = edible => food => (food.eat(edible) ?? '');
Elements.Meal.upto = edible => food => food.eat(Elements.Meal.many(Elements.Meal.not(edible)));
Elements.Meal._ = food => {
const out = food.eat( Elements.Meal.maybe(Elements.Meal.many(Elements.Meal.any(' ','\t'))) );
if (out === null) return null;
return food.tokensOnly ? out : out.join('');
}
Elements.Meal.__ = food => {
const out = food.eat( Elements.Meal.many(Elements.Meal.any(' ', '\t')) );
if (out === null) return null;
return food.tokensOnly ? out : out.join('');
}
}
// Thread
// Multiple things in sort of parallel
// Support for asynchronous frames and things
{
let threads = [];
Elements.Thread = class Thread {
constructor(generator=function*(){yield;}) {
this.content = generator(this);
this.complete = false;
this.task_complete = false;
this.waited_a_frame
}
start() { threads.push(this); }
};
Elements.Thread.frame = Symbol.for('Elements.Thread.frame');
Elements.Thread.stop = Symbol.for('Elements.Thread.stop');
Elements.Thread.waited = Symbol.for('Elements.Thread.waited');
(async () => {
// forever try and compute threads
while (true) {
let last = performance.now();
// mark every running thread as ready to compute
for (let thread of threads) {
thread.task_complete = false;
thread.waited_a_frame = true;
}
// compute as many tasks in all threads as possible in a 60th of a second (frame)
while (performance.now() - last < 1000/60) {
for (let self of threads) {
// if there's nothing left of the thread
// or if it asked to wait 'till the next frame (end of task)
if (self.complete || self.task_complete) continue;
let waited;
if (self.waited_a_frame) {
waited = Elements.Thread.waited;
self.waited_a_frame = false;
}
// compute next part of thread, allowing for async
const next = await self.content.next(waited);
// generator done means thread is done
if (next.done)
self.complete = true;
// thread asks to wait a frame
else if (next.value == Elements.Thread.frame)
self.task_complete = true;
// thread asks to prematurely end thread
else if (next.value == Elements.Thread.stop)
self.complete = true;
// ignore undefinedness
else if (next.value == undefined);
// log a yellow string if yielded because yellow is cool
else if (typeof next.value == 'string')
console.log(`%c ~ ${next.value} `, 'color: #ff0');
// log anything else if yielded
else console.log(`%c ~ `, 'color: #ff0', next.value);
}
}
await new Promise(requestAnimationFrame); // wait a frame
}
})();
}