@angular/material
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Angular Material
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JavaScript
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getOwnPropSymbols = Object.getOwnPropertySymbols;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __propIsEnum = Object.prototype.propertyIsEnumerable;
var __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, { enumerable: true, configurable: true, writable: true, value }) : obj[key] = value;
var __spreadValues = (a, b) => {
for (var prop in b || (b = {}))
if (__hasOwnProp.call(b, prop))
__defNormalProp(a, prop, b[prop]);
if (__getOwnPropSymbols)
for (var prop of __getOwnPropSymbols(b)) {
if (__propIsEnum.call(b, prop))
__defNormalProp(a, prop, b[prop]);
}
return a;
};
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
if (from && typeof from === "object" || typeof from === "function") {
for (let key of __getOwnPropNames(from))
if (!__hasOwnProp.call(to, key) && key !== except)
__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
}
return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var __async = (__this, __arguments, generator) => {
return new Promise((resolve, reject) => {
var fulfilled = (value) => {
try {
step(generator.next(value));
} catch (e) {
reject(e);
}
};
var rejected = (value) => {
try {
step(generator.throw(value));
} catch (e) {
reject(e);
}
};
var step = (x) => x.done ? resolve(x.value) : Promise.resolve(x.value).then(fulfilled, rejected);
step((generator = generator.apply(__this, __arguments)).next());
});
};
// src/material/schematics/ng-generate/theme-color/index.ts
var theme_color_exports = {};
__export(theme_color_exports, {
default: () => theme_color_default,
generateSCSSTheme: () => generateSCSSTheme,
getAllSysVariablesCSS: () => getAllSysVariablesCSS,
getColorPalettes: () => getColorPalettes,
getHctFromHex: () => getHctFromHex,
getHighContrastOverridesCSS: () => getHighContrastOverridesCSS,
getMaterialDynamicScheme: () => getMaterialDynamicScheme
});
module.exports = __toCommonJS(theme_color_exports);
// node_modules/.aspect_rules_js/@material+material-color-utilities@0.3.0/node_modules/@material/material-color-utilities/utils/math_utils.js
function signum(num) {
if (num < 0) {
return -1;
} else if (num === 0) {
return 0;
} else {
return 1;
}
}
function lerp(start, stop, amount) {
return (1 - amount) * start + amount * stop;
}
function clampInt(min, max, input) {
if (input < min) {
return min;
} else if (input > max) {
return max;
}
return input;
}
function clampDouble(min, max, input) {
if (input < min) {
return min;
} else if (input > max) {
return max;
}
return input;
}
function sanitizeDegreesInt(degrees) {
degrees = degrees % 360;
if (degrees < 0) {
degrees = degrees + 360;
}
return degrees;
}
function sanitizeDegreesDouble(degrees) {
degrees = degrees % 360;
if (degrees < 0) {
degrees = degrees + 360;
}
return degrees;
}
function differenceDegrees(a, b) {
return 180 - Math.abs(Math.abs(a - b) - 180);
}
function matrixMultiply(row, matrix) {
const a = row[0] * matrix[0][0] + row[1] * matrix[0][1] + row[2] * matrix[0][2];
const b = row[0] * matrix[1][0] + row[1] * matrix[1][1] + row[2] * matrix[1][2];
const c = row[0] * matrix[2][0] + row[1] * matrix[2][1] + row[2] * matrix[2][2];
return [a, b, c];
}
// node_modules/.aspect_rules_js/@material+material-color-utilities@0.3.0/node_modules/@material/material-color-utilities/utils/color_utils.js
var SRGB_TO_XYZ = [
[0.41233895, 0.35762064, 0.18051042],
[0.2126, 0.7152, 0.0722],
[0.01932141, 0.11916382, 0.95034478]
];
var XYZ_TO_SRGB = [
[
3.2413774792388685,
-1.5376652402851851,
-0.49885366846268053
],
[
-0.9691452513005321,
1.8758853451067872,
0.04156585616912061
],
[
0.05562093689691305,
-0.20395524564742123,
1.0571799111220335
]
];
var WHITE_POINT_D65 = [95.047, 100, 108.883];
function argbFromRgb(red, green, blue) {
return (255 << 24 | (red & 255) << 16 | (green & 255) << 8 | blue & 255) >>> 0;
}
function argbFromLinrgb(linrgb) {
const r = delinearized(linrgb[0]);
const g = delinearized(linrgb[1]);
const b = delinearized(linrgb[2]);
return argbFromRgb(r, g, b);
}
function redFromArgb(argb) {
return argb >> 16 & 255;
}
function greenFromArgb(argb) {
return argb >> 8 & 255;
}
function blueFromArgb(argb) {
return argb & 255;
}
function argbFromXyz(x, y, z) {
const matrix = XYZ_TO_SRGB;
const linearR = matrix[0][0] * x + matrix[0][1] * y + matrix[0][2] * z;
const linearG = matrix[1][0] * x + matrix[1][1] * y + matrix[1][2] * z;
const linearB = matrix[2][0] * x + matrix[2][1] * y + matrix[2][2] * z;
const r = delinearized(linearR);
const g = delinearized(linearG);
const b = delinearized(linearB);
return argbFromRgb(r, g, b);
}
function xyzFromArgb(argb) {
const r = linearized(redFromArgb(argb));
const g = linearized(greenFromArgb(argb));
const b = linearized(blueFromArgb(argb));
return matrixMultiply([r, g, b], SRGB_TO_XYZ);
}
function labFromArgb(argb) {
const linearR = linearized(redFromArgb(argb));
const linearG = linearized(greenFromArgb(argb));
const linearB = linearized(blueFromArgb(argb));
const matrix = SRGB_TO_XYZ;
const x = matrix[0][0] * linearR + matrix[0][1] * linearG + matrix[0][2] * linearB;
const y = matrix[1][0] * linearR + matrix[1][1] * linearG + matrix[1][2] * linearB;
const z = matrix[2][0] * linearR + matrix[2][1] * linearG + matrix[2][2] * linearB;
const whitePoint = WHITE_POINT_D65;
const xNormalized = x / whitePoint[0];
const yNormalized = y / whitePoint[1];
const zNormalized = z / whitePoint[2];
const fx = labF(xNormalized);
const fy = labF(yNormalized);
const fz = labF(zNormalized);
const l = 116 * fy - 16;
const a = 500 * (fx - fy);
const b = 200 * (fy - fz);
return [l, a, b];
}
function argbFromLstar(lstar) {
const y = yFromLstar(lstar);
const component = delinearized(y);
return argbFromRgb(component, component, component);
}
function lstarFromArgb(argb) {
const y = xyzFromArgb(argb)[1];
return 116 * labF(y / 100) - 16;
}
function yFromLstar(lstar) {
return 100 * labInvf((lstar + 16) / 116);
}
function lstarFromY(y) {
return labF(y / 100) * 116 - 16;
}
function linearized(rgbComponent) {
const normalized = rgbComponent / 255;
if (normalized <= 0.040449936) {
return normalized / 12.92 * 100;
} else {
return Math.pow((normalized + 0.055) / 1.055, 2.4) * 100;
}
}
function delinearized(rgbComponent) {
const normalized = rgbComponent / 100;
let delinearized2 = 0;
if (normalized <= 31308e-7) {
delinearized2 = normalized * 12.92;
} else {
delinearized2 = 1.055 * Math.pow(normalized, 1 / 2.4) - 0.055;
}
return clampInt(0, 255, Math.round(delinearized2 * 255));
}
function whitePointD65() {
return WHITE_POINT_D65;
}
function labF(t) {
const e = 216 / 24389;
const kappa = 24389 / 27;
if (t > e) {
return Math.pow(t, 1 / 3);
} else {
return (kappa * t + 16) / 116;
}
}
function labInvf(ft) {
const e = 216 / 24389;
const kappa = 24389 / 27;
const ft3 = ft * ft * ft;
if (ft3 > e) {
return ft3;
} else {
return (116 * ft - 16) / kappa;
}
}
// node_modules/.aspect_rules_js/@material+material-color-utilities@0.3.0/node_modules/@material/material-color-utilities/hct/viewing_conditions.js
var ViewingConditions = class _ViewingConditions {
/**
* Create ViewingConditions from a simple, physically relevant, set of
* parameters.
*
* @param whitePoint White point, measured in the XYZ color space.
* default = D65, or sunny day afternoon
* @param adaptingLuminance The luminance of the adapting field. Informally,
* how bright it is in the room where the color is viewed. Can be
* calculated from lux by multiplying lux by 0.0586. default = 11.72,
* or 200 lux.
* @param backgroundLstar The lightness of the area surrounding the color.
* measured by L* in L*a*b*. default = 50.0
* @param surround A general description of the lighting surrounding the
* color. 0 is pitch dark, like watching a movie in a theater. 1.0 is a
* dimly light room, like watching TV at home at night. 2.0 means there
* is no difference between the lighting on the color and around it.
* default = 2.0
* @param discountingIlluminant Whether the eye accounts for the tint of the
* ambient lighting, such as knowing an apple is still red in green light.
* default = false, the eye does not perform this process on
* self-luminous objects like displays.
*/
static make(whitePoint = whitePointD65(), adaptingLuminance = 200 / Math.PI * yFromLstar(50) / 100, backgroundLstar = 50, surround = 2, discountingIlluminant = false) {
const xyz = whitePoint;
const rW = xyz[0] * 0.401288 + xyz[1] * 0.650173 + xyz[2] * -0.051461;
const gW = xyz[0] * -0.250268 + xyz[1] * 1.204414 + xyz[2] * 0.045854;
const bW = xyz[0] * -2079e-6 + xyz[1] * 0.048952 + xyz[2] * 0.953127;
const f = 0.8 + surround / 10;
const c = f >= 0.9 ? lerp(0.59, 0.69, (f - 0.9) * 10) : lerp(0.525, 0.59, (f - 0.8) * 10);
let d = discountingIlluminant ? 1 : f * (1 - 1 / 3.6 * Math.exp((-adaptingLuminance - 42) / 92));
d = d > 1 ? 1 : d < 0 ? 0 : d;
const nc = f;
const rgbD = [
d * (100 / rW) + 1 - d,
d * (100 / gW) + 1 - d,
d * (100 / bW) + 1 - d
];
const k = 1 / (5 * adaptingLuminance + 1);
const k4 = k * k * k * k;
const k4F = 1 - k4;
const fl = k4 * adaptingLuminance + 0.1 * k4F * k4F * Math.cbrt(5 * adaptingLuminance);
const n = yFromLstar(backgroundLstar) / whitePoint[1];
const z = 1.48 + Math.sqrt(n);
const nbb = 0.725 / Math.pow(n, 0.2);
const ncb = nbb;
const rgbAFactors = [
Math.pow(fl * rgbD[0] * rW / 100, 0.42),
Math.pow(fl * rgbD[1] * gW / 100, 0.42),
Math.pow(fl * rgbD[2] * bW / 100, 0.42)
];
const rgbA = [
400 * rgbAFactors[0] / (rgbAFactors[0] + 27.13),
400 * rgbAFactors[1] / (rgbAFactors[1] + 27.13),
400 * rgbAFactors[2] / (rgbAFactors[2] + 27.13)
];
const aw = (2 * rgbA[0] + rgbA[1] + 0.05 * rgbA[2]) * nbb;
return new _ViewingConditions(n, aw, nbb, ncb, c, nc, rgbD, fl, Math.pow(fl, 0.25), z);
}
/**
* Parameters are intermediate values of the CAM16 conversion process. Their
* names are shorthand for technical color science terminology, this class
* would not benefit from documenting them individually. A brief overview
* is available in the CAM16 specification, and a complete overview requires
* a color science textbook, such as Fairchild's Color Appearance Models.
*/
constructor(n, aw, nbb, ncb, c, nc, rgbD, fl, fLRoot, z) {
this.n = n;
this.aw = aw;
this.nbb = nbb;
this.ncb = ncb;
this.c = c;
this.nc = nc;
this.rgbD = rgbD;
this.fl = fl;
this.fLRoot = fLRoot;
this.z = z;
}
};
ViewingConditions.DEFAULT = ViewingConditions.make();
// node_modules/.aspect_rules_js/@material+material-color-utilities@0.3.0/node_modules/@material/material-color-utilities/hct/cam16.js
var Cam16 = class _Cam16 {
/**
* All of the CAM16 dimensions can be calculated from 3 of the dimensions, in
* the following combinations:
* - {j or q} and {c, m, or s} and hue
* - jstar, astar, bstar
* Prefer using a static method that constructs from 3 of those dimensions.
* This constructor is intended for those methods to use to return all
* possible dimensions.
*
* @param hue
* @param chroma informally, colorfulness / color intensity. like saturation
* in HSL, except perceptually accurate.
* @param j lightness
* @param q brightness; ratio of lightness to white point's lightness
* @param m colorfulness
* @param s saturation; ratio of chroma to white point's chroma
* @param jstar CAM16-UCS J coordinate
* @param astar CAM16-UCS a coordinate
* @param bstar CAM16-UCS b coordinate
*/
constructor(hue, chroma, j, q, m, s, jstar, astar, bstar) {
this.hue = hue;
this.chroma = chroma;
this.j = j;
this.q = q;
this.m = m;
this.s = s;
this.jstar = jstar;
this.astar = astar;
this.bstar = bstar;
}
/**
* CAM16 instances also have coordinates in the CAM16-UCS space, called J*,
* a*, b*, or jstar, astar, bstar in code. CAM16-UCS is included in the CAM16
* specification, and is used to measure distances between colors.
*/
distance(other) {
const dJ = this.jstar - other.jstar;
const dA = this.astar - other.astar;
const dB = this.bstar - other.bstar;
const dEPrime = Math.sqrt(dJ * dJ + dA * dA + dB * dB);
const dE = 1.41 * Math.pow(dEPrime, 0.63);
return dE;
}
/**
* @param argb ARGB representation of a color.
* @return CAM16 color, assuming the color was viewed in default viewing
* conditions.
*/
static fromInt(argb) {
return _Cam16.fromIntInViewingConditions(argb, ViewingConditions.DEFAULT);
}
/**
* @param argb ARGB representation of a color.
* @param viewingConditions Information about the environment where the color
* was observed.
* @return CAM16 color.
*/
static fromIntInViewingConditions(argb, viewingConditions) {
const red = (argb & 16711680) >> 16;
const green = (argb & 65280) >> 8;
const blue = argb & 255;
const redL = linearized(red);
const greenL = linearized(green);
const blueL = linearized(blue);
const x = 0.41233895 * redL + 0.35762064 * greenL + 0.18051042 * blueL;
const y = 0.2126 * redL + 0.7152 * greenL + 0.0722 * blueL;
const z = 0.01932141 * redL + 0.11916382 * greenL + 0.95034478 * blueL;
const rC = 0.401288 * x + 0.650173 * y - 0.051461 * z;
const gC = -0.250268 * x + 1.204414 * y + 0.045854 * z;
const bC = -2079e-6 * x + 0.048952 * y + 0.953127 * z;
const rD = viewingConditions.rgbD[0] * rC;
const gD = viewingConditions.rgbD[1] * gC;
const bD = viewingConditions.rgbD[2] * bC;
const rAF = Math.pow(viewingConditions.fl * Math.abs(rD) / 100, 0.42);
const gAF = Math.pow(viewingConditions.fl * Math.abs(gD) / 100, 0.42);
const bAF = Math.pow(viewingConditions.fl * Math.abs(bD) / 100, 0.42);
const rA = signum(rD) * 400 * rAF / (rAF + 27.13);
const gA = signum(gD) * 400 * gAF / (gAF + 27.13);
const bA = signum(bD) * 400 * bAF / (bAF + 27.13);
const a = (11 * rA + -12 * gA + bA) / 11;
const b = (rA + gA - 2 * bA) / 9;
const u = (20 * rA + 20 * gA + 21 * bA) / 20;
const p2 = (40 * rA + 20 * gA + bA) / 20;
const atan2 = Math.atan2(b, a);
const atanDegrees = atan2 * 180 / Math.PI;
const hue = atanDegrees < 0 ? atanDegrees + 360 : atanDegrees >= 360 ? atanDegrees - 360 : atanDegrees;
const hueRadians = hue * Math.PI / 180;
const ac = p2 * viewingConditions.nbb;
const j = 100 * Math.pow(ac / viewingConditions.aw, viewingConditions.c * viewingConditions.z);
const q = 4 / viewingConditions.c * Math.sqrt(j / 100) * (viewingConditions.aw + 4) * viewingConditions.fLRoot;
const huePrime = hue < 20.14 ? hue + 360 : hue;
const eHue = 0.25 * (Math.cos(huePrime * Math.PI / 180 + 2) + 3.8);
const p1 = 5e4 / 13 * eHue * viewingConditions.nc * viewingConditions.ncb;
const t = p1 * Math.sqrt(a * a + b * b) / (u + 0.305);
const alpha = Math.pow(t, 0.9) * Math.pow(1.64 - Math.pow(0.29, viewingConditions.n), 0.73);
const c = alpha * Math.sqrt(j / 100);
const m = c * viewingConditions.fLRoot;
const s = 50 * Math.sqrt(alpha * viewingConditions.c / (viewingConditions.aw + 4));
const jstar = (1 + 100 * 7e-3) * j / (1 + 7e-3 * j);
const mstar = 1 / 0.0228 * Math.log(1 + 0.0228 * m);
const astar = mstar * Math.cos(hueRadians);
const bstar = mstar * Math.sin(hueRadians);
return new _Cam16(hue, c, j, q, m, s, jstar, astar, bstar);
}
/**
* @param j CAM16 lightness
* @param c CAM16 chroma
* @param h CAM16 hue
*/
static fromJch(j, c, h) {
return _Cam16.fromJchInViewingConditions(j, c, h, ViewingConditions.DEFAULT);
}
/**
* @param j CAM16 lightness
* @param c CAM16 chroma
* @param h CAM16 hue
* @param viewingConditions Information about the environment where the color
* was observed.
*/
static fromJchInViewingConditions(j, c, h, viewingConditions) {
const q = 4 / viewingConditions.c * Math.sqrt(j / 100) * (viewingConditions.aw + 4) * viewingConditions.fLRoot;
const m = c * viewingConditions.fLRoot;
const alpha = c / Math.sqrt(j / 100);
const s = 50 * Math.sqrt(alpha * viewingConditions.c / (viewingConditions.aw + 4));
const hueRadians = h * Math.PI / 180;
const jstar = (1 + 100 * 7e-3) * j / (1 + 7e-3 * j);
const mstar = 1 / 0.0228 * Math.log(1 + 0.0228 * m);
const astar = mstar * Math.cos(hueRadians);
const bstar = mstar * Math.sin(hueRadians);
return new _Cam16(h, c, j, q, m, s, jstar, astar, bstar);
}
/**
* @param jstar CAM16-UCS lightness.
* @param astar CAM16-UCS a dimension. Like a* in L*a*b*, it is a Cartesian
* coordinate on the Y axis.
* @param bstar CAM16-UCS b dimension. Like a* in L*a*b*, it is a Cartesian
* coordinate on the X axis.
*/
static fromUcs(jstar, astar, bstar) {
return _Cam16.fromUcsInViewingConditions(jstar, astar, bstar, ViewingConditions.DEFAULT);
}
/**
* @param jstar CAM16-UCS lightness.
* @param astar CAM16-UCS a dimension. Like a* in L*a*b*, it is a Cartesian
* coordinate on the Y axis.
* @param bstar CAM16-UCS b dimension. Like a* in L*a*b*, it is a Cartesian
* coordinate on the X axis.
* @param viewingConditions Information about the environment where the color
* was observed.
*/
static fromUcsInViewingConditions(jstar, astar, bstar, viewingConditions) {
const a = astar;
const b = bstar;
const m = Math.sqrt(a * a + b * b);
const M = (Math.exp(m * 0.0228) - 1) / 0.0228;
const c = M / viewingConditions.fLRoot;
let h = Math.atan2(b, a) * (180 / Math.PI);
if (h < 0) {
h += 360;
}
const j = jstar / (1 - (jstar - 100) * 7e-3);
return _Cam16.fromJchInViewingConditions(j, c, h, viewingConditions);
}
/**
* @return ARGB representation of color, assuming the color was viewed in
* default viewing conditions, which are near-identical to the default
* viewing conditions for sRGB.
*/
toInt() {
return this.viewed(ViewingConditions.DEFAULT);
}
/**
* @param viewingConditions Information about the environment where the color
* will be viewed.
* @return ARGB representation of color
*/
viewed(viewingConditions) {
const alpha = this.chroma === 0 || this.j === 0 ? 0 : this.chroma / Math.sqrt(this.j / 100);
const t = Math.pow(alpha / Math.pow(1.64 - Math.pow(0.29, viewingConditions.n), 0.73), 1 / 0.9);
const hRad = this.hue * Math.PI / 180;
const eHue = 0.25 * (Math.cos(hRad + 2) + 3.8);
const ac = viewingConditions.aw * Math.pow(this.j / 100, 1 / viewingConditions.c / viewingConditions.z);
const p1 = eHue * (5e4 / 13) * viewingConditions.nc * viewingConditions.ncb;
const p2 = ac / viewingConditions.nbb;
const hSin = Math.sin(hRad);
const hCos = Math.cos(hRad);
const gamma = 23 * (p2 + 0.305) * t / (23 * p1 + 11 * t * hCos + 108 * t * hSin);
const a = gamma * hCos;
const b = gamma * hSin;
const rA = (460 * p2 + 451 * a + 288 * b) / 1403;
const gA = (460 * p2 - 891 * a - 261 * b) / 1403;
const bA = (460 * p2 - 220 * a - 6300 * b) / 1403;
const rCBase = Math.max(0, 27.13 * Math.abs(rA) / (400 - Math.abs(rA)));
const rC = signum(rA) * (100 / viewingConditions.fl) * Math.pow(rCBase, 1 / 0.42);
const gCBase = Math.max(0, 27.13 * Math.abs(gA) / (400 - Math.abs(gA)));
const gC = signum(gA) * (100 / viewingConditions.fl) * Math.pow(gCBase, 1 / 0.42);
const bCBase = Math.max(0, 27.13 * Math.abs(bA) / (400 - Math.abs(bA)));
const bC = signum(bA) * (100 / viewingConditions.fl) * Math.pow(bCBase, 1 / 0.42);
const rF = rC / viewingConditions.rgbD[0];
const gF = gC / viewingConditions.rgbD[1];
const bF = bC / viewingConditions.rgbD[2];
const x = 1.86206786 * rF - 1.01125463 * gF + 0.14918677 * bF;
const y = 0.38752654 * rF + 0.62144744 * gF - 897398e-8 * bF;
const z = -0.0158415 * rF - 0.03412294 * gF + 1.04996444 * bF;
const argb = argbFromXyz(x, y, z);
return argb;
}
/// Given color expressed in XYZ and viewed in [viewingConditions], convert to
/// CAM16.
static fromXyzInViewingConditions(x, y, z, viewingConditions) {
const rC = 0.401288 * x + 0.650173 * y - 0.051461 * z;
const gC = -0.250268 * x + 1.204414 * y + 0.045854 * z;
const bC = -2079e-6 * x + 0.048952 * y + 0.953127 * z;
const rD = viewingConditions.rgbD[0] * rC;
const gD = viewingConditions.rgbD[1] * gC;
const bD = viewingConditions.rgbD[2] * bC;
const rAF = Math.pow(viewingConditions.fl * Math.abs(rD) / 100, 0.42);
const gAF = Math.pow(viewingConditions.fl * Math.abs(gD) / 100, 0.42);
const bAF = Math.pow(viewingConditions.fl * Math.abs(bD) / 100, 0.42);
const rA = signum(rD) * 400 * rAF / (rAF + 27.13);
const gA = signum(gD) * 400 * gAF / (gAF + 27.13);
const bA = signum(bD) * 400 * bAF / (bAF + 27.13);
const a = (11 * rA + -12 * gA + bA) / 11;
const b = (rA + gA - 2 * bA) / 9;
const u = (20 * rA + 20 * gA + 21 * bA) / 20;
const p2 = (40 * rA + 20 * gA + bA) / 20;
const atan2 = Math.atan2(b, a);
const atanDegrees = atan2 * 180 / Math.PI;
const hue = atanDegrees < 0 ? atanDegrees + 360 : atanDegrees >= 360 ? atanDegrees - 360 : atanDegrees;
const hueRadians = hue * Math.PI / 180;
const ac = p2 * viewingConditions.nbb;
const J = 100 * Math.pow(ac / viewingConditions.aw, viewingConditions.c * viewingConditions.z);
const Q = 4 / viewingConditions.c * Math.sqrt(J / 100) * (viewingConditions.aw + 4) * viewingConditions.fLRoot;
const huePrime = hue < 20.14 ? hue + 360 : hue;
const eHue = 1 / 4 * (Math.cos(huePrime * Math.PI / 180 + 2) + 3.8);
const p1 = 5e4 / 13 * eHue * viewingConditions.nc * viewingConditions.ncb;
const t = p1 * Math.sqrt(a * a + b * b) / (u + 0.305);
const alpha = Math.pow(t, 0.9) * Math.pow(1.64 - Math.pow(0.29, viewingConditions.n), 0.73);
const C = alpha * Math.sqrt(J / 100);
const M = C * viewingConditions.fLRoot;
const s = 50 * Math.sqrt(alpha * viewingConditions.c / (viewingConditions.aw + 4));
const jstar = (1 + 100 * 7e-3) * J / (1 + 7e-3 * J);
const mstar = Math.log(1 + 0.0228 * M) / 0.0228;
const astar = mstar * Math.cos(hueRadians);
const bstar = mstar * Math.sin(hueRadians);
return new _Cam16(hue, C, J, Q, M, s, jstar, astar, bstar);
}
/// XYZ representation of CAM16 seen in [viewingConditions].
xyzInViewingConditions(viewingConditions) {
const alpha = this.chroma === 0 || this.j === 0 ? 0 : this.chroma / Math.sqrt(this.j / 100);
const t = Math.pow(alpha / Math.pow(1.64 - Math.pow(0.29, viewingConditions.n), 0.73), 1 / 0.9);
const hRad = this.hue * Math.PI / 180;
const eHue = 0.25 * (Math.cos(hRad + 2) + 3.8);
const ac = viewingConditions.aw * Math.pow(this.j / 100, 1 / viewingConditions.c / viewingConditions.z);
const p1 = eHue * (5e4 / 13) * viewingConditions.nc * viewingConditions.ncb;
const p2 = ac / viewingConditions.nbb;
const hSin = Math.sin(hRad);
const hCos = Math.cos(hRad);
const gamma = 23 * (p2 + 0.305) * t / (23 * p1 + 11 * t * hCos + 108 * t * hSin);
const a = gamma * hCos;
const b = gamma * hSin;
const rA = (460 * p2 + 451 * a + 288 * b) / 1403;
const gA = (460 * p2 - 891 * a - 261 * b) / 1403;
const bA = (460 * p2 - 220 * a - 6300 * b) / 1403;
const rCBase = Math.max(0, 27.13 * Math.abs(rA) / (400 - Math.abs(rA)));
const rC = signum(rA) * (100 / viewingConditions.fl) * Math.pow(rCBase, 1 / 0.42);
const gCBase = Math.max(0, 27.13 * Math.abs(gA) / (400 - Math.abs(gA)));
const gC = signum(gA) * (100 / viewingConditions.fl) * Math.pow(gCBase, 1 / 0.42);
const bCBase = Math.max(0, 27.13 * Math.abs(bA) / (400 - Math.abs(bA)));
const bC = signum(bA) * (100 / viewingConditions.fl) * Math.pow(bCBase, 1 / 0.42);
const rF = rC / viewingConditions.rgbD[0];
const gF = gC / viewingConditions.rgbD[1];
const bF = bC / viewingConditions.rgbD[2];
const x = 1.86206786 * rF - 1.01125463 * gF + 0.14918677 * bF;
const y = 0.38752654 * rF + 0.62144744 * gF - 897398e-8 * bF;
const z = -0.0158415 * rF - 0.03412294 * gF + 1.04996444 * bF;
return [x, y, z];
}
};
// node_modules/.aspect_rules_js/@material+material-color-utilities@0.3.0/node_modules/@material/material-color-utilities/hct/hct_solver.js
var HctSolver = class _HctSolver {
/**
* Sanitizes a small enough angle in radians.
*
* @param angle An angle in radians; must not deviate too much
* from 0.
* @return A coterminal angle between 0 and 2pi.
*/
static sanitizeRadians(angle) {
return (angle + Math.PI * 8) % (Math.PI * 2);
}
/**
* Delinearizes an RGB component, returning a floating-point
* number.
*
* @param rgbComponent 0.0 <= rgb_component <= 100.0, represents
* linear R/G/B channel
* @return 0.0 <= output <= 255.0, color channel converted to
* regular RGB space
*/
static trueDelinearized(rgbComponent) {
const normalized = rgbComponent / 100;
let delinearized2 = 0;
if (normalized <= 31308e-7) {
delinearized2 = normalized * 12.92;
} else {
delinearized2 = 1.055 * Math.pow(normalized, 1 / 2.4) - 0.055;
}
return delinearized2 * 255;
}
static chromaticAdaptation(component) {
const af = Math.pow(Math.abs(component), 0.42);
return signum(component) * 400 * af / (af + 27.13);
}
/**
* Returns the hue of a linear RGB color in CAM16.
*
* @param linrgb The linear RGB coordinates of a color.
* @return The hue of the color in CAM16, in radians.
*/
static hueOf(linrgb) {
const scaledDiscount = matrixMultiply(linrgb, _HctSolver.SCALED_DISCOUNT_FROM_LINRGB);
const rA = _HctSolver.chromaticAdaptation(scaledDiscount[0]);
const gA = _HctSolver.chromaticAdaptation(scaledDiscount[1]);
const bA = _HctSolver.chromaticAdaptation(scaledDiscount[2]);
const a = (11 * rA + -12 * gA + bA) / 11;
const b = (rA + gA - 2 * bA) / 9;
return Math.atan2(b, a);
}
static areInCyclicOrder(a, b, c) {
const deltaAB = _HctSolver.sanitizeRadians(b - a);
const deltaAC = _HctSolver.sanitizeRadians(c - a);
return deltaAB < deltaAC;
}
/**
* Solves the lerp equation.
*
* @param source The starting number.
* @param mid The number in the middle.
* @param target The ending number.
* @return A number t such that lerp(source, target, t) = mid.
*/
static intercept(source, mid, target) {
return (mid - source) / (target - source);
}
static lerpPoint(source, t, target) {
return [
source[0] + (target[0] - source[0]) * t,
source[1] + (target[1] - source[1]) * t,
source[2] + (target[2] - source[2]) * t
];
}
/**
* Intersects a segment with a plane.
*
* @param source The coordinates of point A.
* @param coordinate The R-, G-, or B-coordinate of the plane.
* @param target The coordinates of point B.
* @param axis The axis the plane is perpendicular with. (0: R, 1:
* G, 2: B)
* @return The intersection point of the segment AB with the plane
* R=coordinate, G=coordinate, or B=coordinate
*/
static setCoordinate(source, coordinate, target, axis) {
const t = _HctSolver.intercept(source[axis], coordinate, target[axis]);
return _HctSolver.lerpPoint(source, t, target);
}
static isBounded(x) {
return 0 <= x && x <= 100;
}
/**
* Returns the nth possible vertex of the polygonal intersection.
*
* @param y The Y value of the plane.
* @param n The zero-based index of the point. 0 <= n <= 11.
* @return The nth possible vertex of the polygonal intersection
* of the y plane and the RGB cube, in linear RGB coordinates, if
* it exists. If this possible vertex lies outside of the cube,
* [-1.0, -1.0, -1.0] is returned.
*/
static nthVertex(y, n) {
const kR = _HctSolver.Y_FROM_LINRGB[0];
const kG = _HctSolver.Y_FROM_LINRGB[1];
const kB = _HctSolver.Y_FROM_LINRGB[2];
const coordA = n % 4 <= 1 ? 0 : 100;
const coordB = n % 2 === 0 ? 0 : 100;
if (n < 4) {
const g = coordA;
const b = coordB;
const r = (y - g * kG - b * kB) / kR;
if (_HctSolver.isBounded(r)) {
return [r, g, b];
} else {
return [-1, -1, -1];
}
} else if (n < 8) {
const b = coordA;
const r = coordB;
const g = (y - r * kR - b * kB) / kG;
if (_HctSolver.isBounded(g)) {
return [r, g, b];
} else {
return [-1, -1, -1];
}
} else {
const r = coordA;
const g = coordB;
const b = (y - r * kR - g * kG) / kB;
if (_HctSolver.isBounded(b)) {
return [r, g, b];
} else {
return [-1, -1, -1];
}
}
}
/**
* Finds the segment containing the desired color.
*
* @param y The Y value of the color.
* @param targetHue The hue of the color.
* @return A list of two sets of linear RGB coordinates, each
* corresponding to an endpoint of the segment containing the
* desired color.
*/
static bisectToSegment(y, targetHue) {
let left = [-1, -1, -1];
let right = left;
let leftHue = 0;
let rightHue = 0;
let initialized = false;
let uncut = true;
for (let n = 0; n < 12; n++) {
const mid = _HctSolver.nthVertex(y, n);
if (mid[0] < 0) {
continue;
}
const midHue = _HctSolver.hueOf(mid);
if (!initialized) {
left = mid;
right = mid;
leftHue = midHue;
rightHue = midHue;
initialized = true;
continue;
}
if (uncut || _HctSolver.areInCyclicOrder(leftHue, midHue, rightHue)) {
uncut = false;
if (_HctSolver.areInCyclicOrder(leftHue, targetHue, midHue)) {
right = mid;
rightHue = midHue;
} else {
left = mid;
leftHue = midHue;
}
}
}
return [left, right];
}
static midpoint(a, b) {
return [
(a[0] + b[0]) / 2,
(a[1] + b[1]) / 2,
(a[2] + b[2]) / 2
];
}
static criticalPlaneBelow(x) {
return Math.floor(x - 0.5);
}
static criticalPlaneAbove(x) {
return Math.ceil(x - 0.5);
}
/**
* Finds a color with the given Y and hue on the boundary of the
* cube.
*
* @param y The Y value of the color.
* @param targetHue The hue of the color.
* @return The desired color, in linear RGB coordinates.
*/
static bisectToLimit(y, targetHue) {
const segment = _HctSolver.bisectToSegment(y, targetHue);
let left = segment[0];
let leftHue = _HctSolver.hueOf(left);
let right = segment[1];
for (let axis = 0; axis < 3; axis++) {
if (left[axis] !== right[axis]) {
let lPlane = -1;
let rPlane = 255;
if (left[axis] < right[axis]) {
lPlane = _HctSolver.criticalPlaneBelow(_HctSolver.trueDelinearized(left[axis]));
rPlane = _HctSolver.criticalPlaneAbove(_HctSolver.trueDelinearized(right[axis]));
} else {
lPlane = _HctSolver.criticalPlaneAbove(_HctSolver.trueDelinearized(left[axis]));
rPlane = _HctSolver.criticalPlaneBelow(_HctSolver.trueDelinearized(right[axis]));
}
for (let i = 0; i < 8; i++) {
if (Math.abs(rPlane - lPlane) <= 1) {
break;
} else {
const mPlane = Math.floor((lPlane + rPlane) / 2);
const midPlaneCoordinate = _HctSolver.CRITICAL_PLANES[mPlane];
const mid = _HctSolver.setCoordinate(left, midPlaneCoordinate, right, axis);
const midHue = _HctSolver.hueOf(mid);
if (_HctSolver.areInCyclicOrder(leftHue, targetHue, midHue)) {
right = mid;
rPlane = mPlane;
} else {
left = mid;
leftHue = midHue;
lPlane = mPlane;
}
}
}
}
}
return _HctSolver.midpoint(left, right);
}
static inverseChromaticAdaptation(adapted) {
const adaptedAbs = Math.abs(adapted);
const base = Math.max(0, 27.13 * adaptedAbs / (400 - adaptedAbs));
return signum(adapted) * Math.pow(base, 1 / 0.42);
}
/**
* Finds a color with the given hue, chroma, and Y.
*
* @param hueRadians The desired hue in radians.
* @param chroma The desired chroma.
* @param y The desired Y.
* @return The desired color as a hexadecimal integer, if found; 0
* otherwise.
*/
static findResultByJ(hueRadians, chroma, y) {
let j = Math.sqrt(y) * 11;
const viewingConditions = ViewingConditions.DEFAULT;
const tInnerCoeff = 1 / Math.pow(1.64 - Math.pow(0.29, viewingConditions.n), 0.73);
const eHue = 0.25 * (Math.cos(hueRadians + 2) + 3.8);
const p1 = eHue * (5e4 / 13) * viewingConditions.nc * viewingConditions.ncb;
const hSin = Math.sin(hueRadians);
const hCos = Math.cos(hueRadians);
for (let iterationRound = 0; iterationRound < 5; iterationRound++) {
const jNormalized = j / 100;
const alpha = chroma === 0 || j === 0 ? 0 : chroma / Math.sqrt(jNormalized);
const t = Math.pow(alpha * tInnerCoeff, 1 / 0.9);
const ac = viewingConditions.aw * Math.pow(jNormalized, 1 / viewingConditions.c / viewingConditions.z);
const p2 = ac / viewingConditions.nbb;
const gamma = 23 * (p2 + 0.305) * t / (23 * p1 + 11 * t * hCos + 108 * t * hSin);
const a = gamma * hCos;
const b = gamma * hSin;
const rA = (460 * p2 + 451 * a + 288 * b) / 1403;
const gA = (460 * p2 - 891 * a - 261 * b) / 1403;
const bA = (460 * p2 - 220 * a - 6300 * b) / 1403;
const rCScaled = _HctSolver.inverseChromaticAdaptation(rA);
const gCScaled = _HctSolver.inverseChromaticAdaptation(gA);
const bCScaled = _HctSolver.inverseChromaticAdaptation(bA);
const linrgb = matrixMultiply([rCScaled, gCScaled, bCScaled], _HctSolver.LINRGB_FROM_SCALED_DISCOUNT);
if (linrgb[0] < 0 || linrgb[1] < 0 || linrgb[2] < 0) {
return 0;
}
const kR = _HctSolver.Y_FROM_LINRGB[0];
const kG = _HctSolver.Y_FROM_LINRGB[1];
const kB = _HctSolver.Y_FROM_LINRGB[2];
const fnj = kR * linrgb[0] + kG * linrgb[1] + kB * linrgb[2];
if (fnj <= 0) {
return 0;
}
if (iterationRound === 4 || Math.abs(fnj - y) < 2e-3) {
if (linrgb[0] > 100.01 || linrgb[1] > 100.01 || linrgb[2] > 100.01) {
return 0;
}
return argbFromLinrgb(linrgb);
}
j = j - (fnj - y) * j / (2 * fnj);
}
return 0;
}
/**
* Finds an sRGB color with the given hue, chroma, and L*, if
* possible.
*
* @param hueDegrees The desired hue, in degrees.
* @param chroma The desired chroma.
* @param lstar The desired L*.
* @return A hexadecimal representing the sRGB color. The color
* has sufficiently close hue, chroma, and L* to the desired
* values, if possible; otherwise, the hue and L* will be
* sufficiently close, and chroma will be maximized.
*/
static solveToInt(hueDegrees, chroma, lstar) {
if (chroma < 1e-4 || lstar < 1e-4 || lstar > 99.9999) {
return argbFromLstar(lstar);
}
hueDegrees = sanitizeDegreesDouble(hueDegrees);
const hueRadians = hueDegrees / 180 * Math.PI;
const y = yFromLstar(lstar);
const exactAnswer = _HctSolver.findResultByJ(hueRadians, chroma, y);
if (exactAnswer !== 0) {
return exactAnswer;
}
const linrgb = _HctSolver.bisectToLimit(y, hueRadians);
return argbFromLinrgb(linrgb);
}
/**
* Finds an sRGB color with the given hue, chroma, and L*, if
* possible.
*
* @param hueDegrees The desired hue, in degrees.
* @param chroma The desired chroma.
* @param lstar The desired L*.
* @return An CAM16 object representing the sRGB color. The color
* has sufficiently close hue, chroma, and L* to the desired
* values, if possible; otherwise, the hue and L* will be
* sufficiently close, and chroma will be maximized.
*/
static solveToCam(hueDegrees, chroma, lstar) {
return Cam16.fromInt(_HctSolver.solveToInt(hueDegrees, chroma, lstar));
}
};
HctSolver.SCALED_DISCOUNT_FROM_LINRGB = [
[
0.001200833568784504,
0.002389694492170889,
2795742885861124e-19
],
[
5891086651375999e-19,
0.0029785502573438758,
3270666104008398e-19
],
[
10146692491640572e-20,
5364214359186694e-19,
0.0032979401770712076
]
];
HctSolver.LINRGB_FROM_SCALED_DISCOUNT = [
[
1373.2198709594231,
-1100.4251190754821,
-7.278681089101213
],
[
-271.815969077903,
559.6580465940733,
-32.46047482791194
],
[
1.9622899599665666,
-57.173814538844006,
308.7233197812385
]
];
HctSolver.Y_FROM_LINRGB = [0.2126, 0.7152, 0.0722];
HctSolver.CRITICAL_PLANES = [
0.015176349177441876,
0.045529047532325624,
0.07588174588720938,
0.10623444424209313,
0.13658714259697685,
0.16693984095186062,
0.19729253930674434,
0.2276452376616281,
0.2579979360165119,
0.28835063437139563,
0.3188300904430532,
0.350925934958123,
0.3848314933096426,
0.42057480301049466,
0.458183274052838,
0.4976837250274023,
0.5391024159806381,
0.5824650784040898,
0.6277969426914107,
0.6751227633498623,
0.7244668422128921,
0.775853049866786,
0.829304845476233,
0.8848452951698498,
0.942497089126609,
1.0022825574869039,
1.0642236851973577,
1.1283421258858297,
1.1946592148522128,
1.2631959812511864,
1.3339731595349034,
1.407011200216447,
1.4823302800086415,
1.5599503113873272,
1.6398909516233677,
1.7221716113234105,
1.8068114625156377,
1.8938294463134073,
1.9832442801866852,
2.075074464868551,
2.1693382909216234,
2.2660538449872063,
2.36523901573795,
2.4669114995532007,
2.5710888059345764,
2.6777882626779785,
2.7870270208169257,
2.898822059350997,
3.0131901897720907,
3.1301480604002863,
3.2497121605402226,
3.3718988244681087,
3.4967242352587946,
3.624204428461639,
3.754355295633311,
3.887192587735158,
4.022731918402185,
4.160988767090289,
4.301978482107941,
4.445716283538092,
4.592217266055746,
4.741496401646282,
4.893568542229298,
5.048448422192488,
5.20615066083972,
5.3666897647573375,
5.5300801301023865,
5.696336044816294,
5.865471690767354,
6.037501145825082,
6.212438385869475,
6.390297286737924,
6.571091626112461,
6.7548350853498045,
6.941541251256611,
7.131223617812143,
7.323895587840543,
7.5195704746346665,
7.7182615035334345,
7.919981813454504,
8.124744458384042,
8.332562408825165,
8.543448553206703,
8.757415699253682,
8.974476575321063,
9.194643831691977,
9.417930041841839,
9.644347703669503,
9.873909240696694,
10.106627003236781,
10.342513269534024,
10.58158024687427,
10.8238400726681,
11.069304815507364,
11.317986476196008,
11.569896988756009,
11.825048221409341,
12.083451977536606,
12.345119996613247,
12.610063955123938,
12.878295467455942,
13.149826086772048,
13.42466730586372,
13.702830557985108,
13.984327217668513,
14.269168601521828,
14.55736596900856,
14.848930523210871,
15.143873411576273,
15.44220572664832,
15.743938506781891,
16.04908273684337,
16.35764934889634,
16.66964922287304,
16.985093187232053,
17.30399201960269,
17.62635644741625,
17.95219714852476,
18.281524751807332,
18.614349837764564,
18.95068293910138,
19.290534541298456,
19.633915083172692,
19.98083495742689,
20.331304511189067,
20.685334046541502,
21.042933821039977,
21.404114048223256,
21.76888489811322,
22.137256497705877,
22.50923893145328,
22.884842241736916,
23.264076429332462,
23.6469514538663,
24.033477234264016,
24.42366364919083,
24.817520537484558,
25.21505769858089,
25.61628489293138,
26.021211842414342,
26.429848230738664,
26.842203703840827,
27.258287870275353,
27.678110301598522,
28.10168053274597,
28.529008062403893,
28.96010235337422,
29.39497283293396,
29.83362889318845,
30.276079891419332,
30.722335150426627,
31.172403958865512,
31.62629557157785,
32.08401920991837,
32.54558406207592,
33.010999283389665,
33.4802739966603,
33.953417292456834,
34.430438229418264,
34.911345834551085,
35.39614910352207,
35.88485700094671,
36.37747846067349,
36.87402238606382,
37.37449765026789,
37.87891309649659,
38.38727753828926,
38.89959975977785,
39.41588851594697,
39.93615253289054,
40.460400508064545,
40.98864111053629,
41.520882981230194,
42.05713473317016,
42.597404951718396,
43.141702194811224,
43.6900349931913,
44.24241185063697,
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// node_modules/.aspect_rules_js/@material+material-color-utilities@0.3.0/node_modules/@material/material-color-utilities/hct/hct.js
var Hct = class _Hct {
static from(hue, chroma, tone) {
return new _Hct(HctSolver.solveToInt(hue, chroma, tone));
}
/**
* @param argb ARGB representation of a color.
* @return HCT representation of a color in default viewing conditions
*/
static fromInt(argb) {
return new _Hct(argb);
}
toInt() {
return this.argb;
}
/**
* A number, in degrees, representing ex. red, orange, yellow, etc.
* Ranges from 0 <= hue < 360.
*/
get hue() {
return this.internalHue;
}
/**
* @param newHue 0 <= newHue < 360; invalid values are corrected.
* Chroma may decrease because chroma has a different maximum for any given
* hue and tone.
*/
set hue(newHue) {
this.setInternalState(HctSolver.solveToInt(newHue, this.internalChroma, this.internalTone));
}
get chroma() {
return this.internalChroma;
}
/**
* @param newChroma 0 <= newChroma < ?
* Chroma may decrease because chroma has a different maximum for any given
* hue and tone.
*/
set chroma(newChroma) {
this.setInternalState(HctSolver.solveToInt(this.internalHue, newChroma, this.internalTone));
}
/** Lightness. Ranges from 0 to 100. */
get tone() {
return this.internalTone;
}
/**
* @param newTone 0 <= newTone <= 100; invalid valids are corrected.
* Chroma may decrease because chroma has a different maximum for any given
* hue and tone.
*/
set tone(newTone) {
this.setInternalState(HctSolver.solveToInt(this.internalHue, this.internalChroma, newTone));
}
constructor(argb) {
this.argb = argb;
const cam = Cam16.fromInt(argb);
this.internalHue = cam.hue;
this.internalChroma = cam.chroma;
this.internalTone = lstarFromArgb(argb);
this.argb = argb;
}
setInternalState(argb) {
const cam = Cam16.fromInt(argb);
this.internalHue = cam.hue;
this.internalChroma = cam.chroma;
this.internalTone = lstarFromArgb(argb);
this.argb = argb;
}
/**
* Translates a color into different [ViewingConditions].
*
* Colors change appearance. They look different with lights on versus off,
* the same color, as in hex code, on white looks different when on black.
* This is called color relativity, most famously explicated by Josef Albers
* in Interaction of Color.
*
* In color science, color appearance models can account for this and
* calculate the appearance of a color in different settings. HCT is based on
* CAM16, a color appearance model, and uses it to make these calculations.
*
* See [ViewingConditions.make] for parameters affecting color appearance.
*/
inViewingConditions(vc) {
const cam = Cam16.fromInt(this.toInt());
const viewedInVc = cam.xyzInViewingConditions(vc);
const recastInVc = Cam16.fromXyzInViewingConditions(viewedInVc[0], viewedInVc[1], viewedInVc[2], ViewingConditions.make());
const recastHct = _Hct.from(recastInVc.hue, recastInVc.chroma, lstarFromY(viewedInVc[1]));
return recastHct;
}
};
// node_modules/.aspect_rules_js/@material+material-color-utilities@0.3.0/node_modules/@material/material-color-utilities/contrast/contrast.js
var Contrast = class _Contrast {
/**
* Returns a contrast ratio, which ranges from 1 to 21.
*
* @param toneA Tone between 0 and 100. Values outside will be clamped.
* @param toneB Tone between 0 and 100. Values outside will be clamped.
*/
static ratioOfTones(toneA, toneB) {
toneA = clampDouble(0, 100, toneA);
toneB = clampDouble(0, 100, toneB);
return _Contrast.ratioOfYs(yFromLstar(toneA), yFromLstar(toneB));
}
static ratioOfYs(y1, y2) {
const lighter = y1 > y2 ? y1 : y2;
const darker = lighter === y2 ? y1 : y2;
return (lighter + 5) / (darker + 5);
}
/**
* Returns a tone >= tone parameter that ensures ratio parameter.
* Return value is between 0 and 100.
* Returns -1 if ratio cannot be achieved with tone parameter.
*
* @param tone Tone return value must contrast with.
* Range is 0 to 100. Invalid values will result in -1 being returned.
* @param ratio Contrast ratio of return value and tone.
* Range is 1 to 21, invalid values have undefined behavior.
*/
static lighter(tone, ratio) {
if (tone < 0 || tone > 100) {
return -1;
}
const darkY = yFromLstar(tone);
const lightY = ratio * (darkY + 5) - 5;
const realContrast = _Contrast.ratioOfYs(lightY, darkY);
const delta = Math.abs(realContrast - ratio);
if (realContrast < ratio && delta > 0.04) {
return -1;
}
const returnValue = lstarFromY(lightY) + 0.4;
if (returnValue < 0 || returnValue > 100) {
return -1;
}
return returnValue;
}
/**
* Returns a tone <= tone parameter that ensures ratio parameter.
* Return value is between 0 and 100.
* Returns -1 if ratio cannot be achieved with tone parameter.
*
* @param tone Tone return value must contrast with.
* Range is 0 to 100. Invalid values will result in -1 being returned.
* @param ratio Contrast ratio of return value and tone.
* Range is 1 to 21, invalid values have undefined behavior.
*/
static darker(tone, ratio) {
if (tone < 0 || tone > 100) {
return -1;
}
const lightY = yFromLstar(tone);
const darkY = (lightY + 5) / ratio - 5;
const realContrast = _Contrast.ratioOfYs(lightY, darkY);
const delta = Math.abs(realContrast - ratio);
if (realContrast < ratio && delta > 0.04) {
return -1;
}
const returnValue = lstarFromY(darkY) - 0.4;
if (returnValue < 0 || returnValue > 100) {
return -1;
}
return returnValue;
}
/**
* Returns a tone >= tone parameter that ensures ratio parameter.
* Return value is between 0 and 100.
* Returns 100 if ratio cannot be achieved with tone parameter.
*
* This method is unsafe because the returned value is guaranteed to be in
* bounds for tone, i.e. between 0 and 100. However, that value may not reach
* the ratio with tone. For example, there is no color lighter than T100.
*
* @param tone Tone return value must contrast with.
* Range is 0 to 100. Invalid values will result in 100 being returned.
* @param ratio Desired contrast ratio of return value and tone parameter.
* Range is 1 to 21, invalid values have undefined behavior.
*/
static lighterUnsafe(tone, ratio) {
const lighterSafe = _Contrast.lighter(tone, ratio);
return lighterSafe < 0 ? 100 : lighterSafe;
}
/**
* Returns a tone >= tone parameter that ensures ratio parameter.
* Return value is between 0 and 100.
* Returns 100 if ratio cannot be achieved with tone parameter.
*