@nativescript/core
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A JavaScript library providing an easy to use api for interacting with iOS and Android platform APIs.
213 lines • 6.84 kB
JavaScript
import { color } from '@csstools/css-color-parser';
import { parseComponentValue } from '@csstools/css-parser-algorithms';
import { serializeRGB } from '@csstools/css-color-parser';
import { tokenize } from '@csstools/css-tokenizer';
export const HEX_REGEX = /(^#[0-9A-F]{6}$)|(^#[0-9A-F]{3}$)|(^#[0-9A-F]{8}$)|(^#[0-9A-F]{4}$)/i;
export function isCssColorMixExpression(value) {
return value.includes('color-mix(');
}
export function argbFromColorMix(value) {
const astComponentValue = parseComponentValue(tokenize({ css: value }));
const colorData = color(astComponentValue);
let argb;
if (colorData) {
const serialized = serializeRGB(colorData);
argb = argbFromRgbOrRgba(serialized.toString());
}
else {
argb = -1;
}
return argb;
}
export function fromArgbToRgba(argb) {
return {
a: (argb >> 24) & 0xff,
r: (argb >> 16) & 0xff,
g: (argb >> 8) & 0xff,
b: argb & 0xff,
};
}
export function isRgbOrRgba(value) {
return (value.startsWith('rgb(') || value.startsWith('rgba(')) && value.endsWith(')');
}
export function isHslOrHsla(value) {
return (value.startsWith('hsl') || value.startsWith('hsla(')) && value.endsWith(')');
}
export function isHsvOrHsva(value) {
return (value.startsWith('hsv') || value.startsWith('hsva(')) && value.endsWith(')');
}
export function parseColorWithAlpha(value) {
const separator = value.indexOf(',') !== -1 ? ',' : ' ';
const parts = value
.replace(/(rgb|hsl|hsv)a?\(/, '')
.replace(')', '')
.replace(/\//, ' ')
.replace(/%/g, '')
.split(separator)
.filter((part) => Boolean(part.length));
let f = 255;
let s = 255;
let t = 255;
let a = 255;
if (parts[0]) {
f = parseFloat(parts[0].trim());
}
if (parts[1]) {
s = parseFloat(parts[1].trim());
}
if (parts[2]) {
t = parseFloat(parts[2].trim());
}
if (parts[3]) {
a = Math.round(parseFloat(parts[3].trim()) * 255);
}
return { f, s, t, a };
}
export function argbFromString(hex) {
// always called as SHARP as first char
hex = hex.substring(1);
const length = hex.length;
// first we normalize
if (length === 3) {
hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
}
else if (length === 4) {
hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2] + hex[3] + hex[3];
}
let intVal = parseInt(hex, 16);
if (hex.length === 6) {
// add the alpha component since the provided string is RRGGBB
intVal = (intVal & 0x00ffffff) + 0xff000000;
}
else {
// the new format is #RRGGBBAA
// we need to shift the alpha value to 0x01000000 position
const a = (intVal / 0x00000001) & 0xff;
intVal = (intVal >>> 8) + (a & 0xff) * 0x01000000;
}
return intVal;
}
export function argbFromRgbOrRgba(value) {
const { f: r, s: g, t: b, a } = parseColorWithAlpha(value);
return (a & 0xff) * 0x01000000 + (r & 0xff) * 0x00010000 + (g & 0xff) * 0x00000100 + (b & 0xff);
}
export function argbFromHslOrHsla(value) {
const { f: h, s: s, t: l, a } = parseColorWithAlpha(value);
const { r, g, b } = hslToRgb(h, s, l);
return (a & 0xff) * 0x01000000 + (r & 0xff) * 0x00010000 + (g & 0xff) * 0x00000100 + (b & 0xff);
}
export function argbFromHsvOrHsva(value) {
const { f: h, s: s, t: v, a } = parseColorWithAlpha(value);
const { r, g, b } = hsvToRgb(h, s, v);
return (a & 0xff) * 0x01000000 + (r & 0xff) * 0x00010000 + (g & 0xff) * 0x00000100 + (b & 0xff);
}
// `rgbToHsl`
// Converts an RGB color value to HSL.
// *Assumes:* r, g, and b are contained in [0, 255]
// *Returns:* { h, s, l } in [0,360] and [0,100]
export function rgbToHsl(r, g, b) {
r /= 255;
g /= 255;
b /= 255;
const max = Math.max(r, g, b), min = Math.min(r, g, b);
let h, s;
const l = (max + min) / 2;
if (max == min) {
h = s = 0; // achromatic
}
else {
const d = max - min;
s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
switch (max) {
case r:
h = (g - b) / d + (g < b ? 6 : 0);
break;
case g:
h = (b - r) / d + 2;
break;
case b:
h = (r - g) / d + 4;
break;
}
h /= 6;
}
return { h: h * 360, s: s * 100, l: l * 100 };
}
export function hue2rgb(p, q, t) {
if (t < 0)
t += 1;
if (t > 1)
t -= 1;
if (t < 1 / 6)
return p + (q - p) * 6 * t;
if (t < 1 / 2)
return q;
if (t < 2 / 3)
return p + (q - p) * (2 / 3 - t) * 6;
return p;
}
// `hslToRgb`
// Converts an HSL color value to RGB.
// *Assumes:* h is contained in [0, 360] and s and l are contained [0, 100]
// *Returns:* { r, g, b } in the set [0, 255]
export function hslToRgb(h1, s1, l1) {
const h = (h1 % 360) / 360;
const s = s1 / 100;
const l = l1 / 100;
let r, g, b;
if (s === 0) {
r = g = b = l; // achromatic
}
else {
const q = l < 0.5 ? l * (1 + s) : l + s - l * s;
const p = 2 * l - q;
r = hue2rgb(p, q, h + 1 / 3);
g = hue2rgb(p, q, h);
b = hue2rgb(p, q, h - 1 / 3);
}
return { r: Math.round(r * 255), g: Math.round(g * 255), b: Math.round(b * 255) };
}
// `rgbToHsv`
// Converts an RGB color value to HSV
// *Assumes:* r, g, and b are contained in the set [0, 255]
// *Returns:* { h, s, v } in [0,360] and [0,100]
export function rgbToHsv(r, g, b) {
r /= 255;
g /= 255;
b /= 255;
const max = Math.max(r, g, b), min = Math.min(r, g, b);
let h;
const v = max;
const d = max - min;
const s = max === 0 ? 0 : d / max;
if (max == min) {
h = 0; // achromatic
}
else {
switch (max) {
case r:
h = (g - b) / d + (g < b ? 6 : 0);
break;
case g:
h = (b - r) / d + 2;
break;
case b:
h = (r - g) / d + 4;
break;
}
h /= 6;
}
return { h: h * 360, s: s * 100, v: v * 100 };
}
// `hsvToRgb`
// Converts an HSV color value to RGB.
// *Assumes:* h is contained in [0, 360] and s and v are contained [0, 100]
// *Returns:* { r, g, b } in the set [0, 255]
export function hsvToRgb(h1, s1, v1) {
const h = ((h1 % 360) / 360) * 6;
const s = s1 / 100;
const v = v1 / 100;
const i = Math.floor(h), f = h - i, p = v * (1 - s), q = v * (1 - f * s), t = v * (1 - (1 - f) * s), mod = i % 6, r = [v, q, p, p, t, v][mod], g = [t, v, v, q, p, p][mod], b = [p, p, t, v, v, q][mod];
return { r: r * 255, g: g * 255, b: b * 255 };
}
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