@pepperi/lib
Version:
This library was generated with [Angular CLI](https://github.com/angular/angular-cli) version 10.0.1.
318 lines • 39.5 kB
JavaScript
const FLOAT_REGEX = /^\d+(\.\d+)?$/;
const THREE_DIGIT_HEX_COLOR_REGEX = /^[0-9a-fA-F]{3}$/;
const THREE_DIGIT_HEX_COLOR_WITH_HASH_REGEX = /^#[0-9a-fA-F]{3}$/;
const SIX_DIGIT_HEX_COLOR_REGEX = /^[0-9a-fA-F]{6}$/;
const SIX_DIGIT_HEX_COLOR_WITH_HASH_REGEX = /^#[0-9a-fA-F]{6}$/;
/**
* Convert hex string to 6 digits hex string.
* @param str The string to convert.
*/
export function hex2sixDigitHex(str) {
if (!str) {
return null;
}
str = str.trim();
if (SIX_DIGIT_HEX_COLOR_WITH_HASH_REGEX.test(str)) {
return str;
}
if (SIX_DIGIT_HEX_COLOR_REGEX.test(str)) {
return '#' + str;
}
if (THREE_DIGIT_HEX_COLOR_WITH_HASH_REGEX.test(str)) {
return '#' + str[1] + str[1] + str[2] + str[2] + str[3] + str[3];
}
if (THREE_DIGIT_HEX_COLOR_REGEX.test(str)) {
return '#' + str[0] + str[0] + str[1] + str[1] + str[2] + str[2];
}
return null;
}
/**
* Convert rgb color to 6 digits hex string.
* @param color The rgb color to convert.
*/
export function rgb2sixDigitHex(color) {
color.r = color.r.toString(16);
color.g = color.g.toString(16);
color.b = color.b.toString(16);
if (color.r.length === 1) {
color.r = '0' + color.r;
}
if (color.g.length === 1) {
color.g = '0' + color.g;
}
if (color.b.length === 1) {
color.b = '0' + color.b;
}
return '#' + color.r + color.g + color.b;
}
/**
* Convert hex string to rgb color.
* @param str The hex string to convert.
*/
export function hex2rgb(str) {
const sixDigitHex = hex2sixDigitHex(str);
if (sixDigitHex === null) {
return null;
}
return {
r: parseInt(sixDigitHex.slice(1, 3), 16),
g: parseInt(sixDigitHex.slice(3, 5), 16),
b: parseInt(sixDigitHex.slice(5, 7), 16)
};
}
export function rgbString2hsl(str) {
const sep = str.indexOf(',') > -1 ? ',' : ' ';
const rgbArr = str.substr(4).split(')')[0].split(sep);
const r = rgbArr[0];
const g = rgbArr[1].substr(0, rgbArr[1].length).trim();
const b = rgbArr[2].substr(0, rgbArr[2].length).trim();
return rgb2hsl({ r, g, b });
}
export function rgb2hsl({ r, g, b }) {
r /= 255;
g /= 255;
b /= 255;
// Find greatest and smallest channel values
const cmin = Math.min(r, g, b);
const cmax = Math.max(r, g, b);
const delta = cmax - cmin;
let h = 0;
let s = 0;
let l = 0;
if (delta === 0) {
h = 0;
}
else if (cmax === r) {
h = ((g - b) / delta) % 6;
}
else if (cmax === g) {
h = (b - r) / delta + 2;
}
else {
h = (r - g) / delta + 4;
}
h = Math.round(h * 60);
if (h < 0) {
h += 360;
}
l = (cmax + cmin) / 2;
s = delta === 0 ? 0 : delta / (1 - Math.abs(2 * l - 1));
s = +(s * 100).toFixed(1);
l = +(l * 100).toFixed(1);
return { h, s, l };
}
export function hslString2hsl(str) {
const sep = str.indexOf(',') > -1 ? ',' : ' ';
const hslArr = str.substr(4).split(')')[0].split(sep);
let h = hslArr[0];
let s = hslArr[1].substr(0, hslArr[1].length).trim();
let l = hslArr[2].substr(0, hslArr[2].length).trim();
// Strip label and convert to degrees (if necessary)
if (h.indexOf('deg') > -1) {
h = h.substr(0, h.length - 3);
}
else if (h.indexOf('rad') > -1) {
h = Math.round(h.substr(0, h.length - 3) * (180 / Math.PI));
}
else if (h.indexOf('turn') > -1) {
h = Math.round(h.substr(0, h.length - 4) * 360);
}
// Keep hue fraction of 360 if ending up over
if (h >= 360) {
h %= 360;
}
// Remove the %
if (s.indexOf('%') > -1) {
s = s.replace(/%/g, '');
}
// Remove the %
if (l.indexOf('%') > -1) {
l = l.replace(/%/g, '');
}
return { h, s, l };
}
export function hsl2rgb({ h, s, l }) {
let r;
let g;
let b;
if (!isFinite(h)) {
h = 0;
}
if (!isFinite(s)) {
s = 0;
}
if (!isFinite(l)) {
l = 0;
}
h /= 60;
if (h < 0) {
h = 6 - (-h % 6);
}
h %= 6;
s = Math.max(0, Math.min(1, s / 100));
l = Math.max(0, Math.min(1, l / 100));
const c = (1 - Math.abs((2 * l) - 1)) * s;
const x = c * (1 - Math.abs((h % 2) - 1));
if (h < 1) {
r = c;
g = x;
b = 0;
}
else if (h < 2) {
r = x;
g = c;
b = 0;
}
else if (h < 3) {
r = 0;
g = c;
b = x;
}
else if (h < 4) {
r = 0;
g = x;
b = c;
}
else if (h < 5) {
r = x;
g = 0;
b = c;
}
else {
r = c;
g = 0;
b = x;
}
const m = l - c / 2;
r = Math.round((r + m) * 255);
g = Math.round((g + m) * 255);
b = Math.round((b + m) * 255);
return { r, g, b };
}
export function hex2hsl(str) {
const sixDigitHex = hex2sixDigitHex(str);
if (sixDigitHex === null) {
return null;
}
const rgb = hex2rgb(sixDigitHex);
if (rgb === null) {
return null;
}
return rgb2hsl(rgb);
}
export function hsl2hex(hsl) {
const rgb = hsl2rgb(hsl);
return rgb2sixDigitHex(rgb);
}
export function relativeLuminance({ r, g, b }) {
[r, g, b] = [r, g, b].map(c => {
c = c / 255;
if (c <= 0.03928) {
return c / 12.92;
}
return Math.pow((c + 0.055) / 1.055, 2.4);
});
return 0.2126 * r + 0.7152 * g + 0.0722 * b;
}
export function contrast(str1, str2) {
const L1 = relativeLuminance(hex2rgb(str1));
const L2 = relativeLuminance(hex2rgb(str2));
if (L1 < L2) {
return (L2 + 0.05) / (L1 + 0.05);
}
return (L1 + 0.05) / (L2 + 0.05);
}
export function findClosestAccessibleDarkerColor(adjustableColor, otherColor, contrastRatio) {
let { h, s, l } = hex2hsl(adjustableColor);
if (contrast(adjustableColor, otherColor) >= contrastRatio) {
return {
color: adjustableColor,
lightness: l
};
}
let minColor = hsl2hex({ h, s, l: 0 });
if (contrast(minColor, otherColor) < contrastRatio) {
return null;
}
let min = 0;
let max = l;
let maxColor = hsl2hex({ h, s, l });
let lastMinColor;
let lastMaxColor;
while (minColor !== lastMinColor || maxColor !== lastMaxColor) {
lastMinColor = minColor;
lastMaxColor = maxColor;
l = (min + max) / 2;
adjustableColor = hsl2hex({ h, s, l });
if (contrast(adjustableColor, otherColor) < contrastRatio) {
max = l;
maxColor = hsl2hex({ h, s, l });
}
else {
min = l;
minColor = hsl2hex({ h, s, l });
}
}
return {
color: minColor,
lightness: min
};
}
export function findClosestAccessibleLighterColor(adjustableColor, otherColor, contrastRatio) {
let { h, s, l } = hex2hsl(adjustableColor);
if (contrast(adjustableColor, otherColor) >= contrastRatio) {
return {
color: adjustableColor,
lightness: l
};
}
let maxColor = hsl2hex({ h, s, l: 100 });
if (contrast(maxColor, otherColor) < contrastRatio) {
return null;
}
let min = l;
let max = 100;
let minColor = hsl2hex({ h, s, l });
let lastMinColor;
let lastMaxColor;
while (minColor !== lastMinColor || maxColor !== lastMaxColor) {
lastMinColor = minColor;
lastMaxColor = maxColor;
l = (min + max) / 2;
adjustableColor = hsl2hex({ h, s, l });
if (contrast(adjustableColor, otherColor) < contrastRatio) {
min = l;
minColor = hsl2hex({ h, s, l });
}
else {
max = l;
maxColor = hsl2hex({ h, s, l });
}
}
return {
color: maxColor,
lightness: max
};
}
export function findClosestAccessibleColor(adjustableColor, otherColor, contrastRatio) {
const closestDarkerColor = findClosestAccessibleDarkerColor(adjustableColor, otherColor, contrastRatio);
const closestLighterColor = findClosestAccessibleLighterColor(adjustableColor, otherColor, contrastRatio);
if (closestDarkerColor === null) {
if (closestLighterColor === null) {
return null;
}
return closestLighterColor.color;
}
if (closestLighterColor === null) {
return closestDarkerColor.color;
}
const { l } = hex2hsl(adjustableColor);
if (closestLighterColor.lightness - l < l - closestDarkerColor.lightness) {
return closestLighterColor.color;
}
return closestDarkerColor.color;
}
export function convertHslToStringHsl(hsl) {
return 'hsl(' + (hsl.h < 0 ? hsl.h + 360 : hsl.h) + ', ' + hsl.s + '%, ' + hsl.l + '%)';
}
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FLOAT_REGEX = /^\\d+(\\.\\d+)?$/;\r\nconst THREE_DIGIT_HEX_COLOR_REGEX = /^[0-9a-fA-F]{3}$/;\r\nconst THREE_DIGIT_HEX_COLOR_WITH_HASH_REGEX = /^#[0-9a-fA-F]{3}$/;\r\nconst SIX_DIGIT_HEX_COLOR_REGEX = /^[0-9a-fA-F]{6}$/;\r\nconst SIX_DIGIT_HEX_COLOR_WITH_HASH_REGEX = /^#[0-9a-fA-F]{6}$/;\r\n\r\nexport interface RgbColor {\r\n    r?: any;\r\n    g?: any;\r\n    b?: any;\r\n}\r\n\r\nexport interface HslColor {\r\n    h?: any;\r\n    s?: any;\r\n    l?: any;\r\n}\r\n\r\nexport interface ClosestColor {\r\n    color: string;\r\n    lightness: number;\r\n}\r\n\r\n/**\r\n * Convert hex string to 6 digits hex string.\r\n * @param str The string to convert.\r\n */\r\nexport function hex2sixDigitHex(str: string): string {\r\n    if (!str) {\r\n        return null;\r\n    }\r\n\r\n    str = str.trim();\r\n\r\n    if (SIX_DIGIT_HEX_COLOR_WITH_HASH_REGEX.test(str)) {\r\n        return str;\r\n    }\r\n\r\n    if (SIX_DIGIT_HEX_COLOR_REGEX.test(str)) {\r\n        return '#' + str;\r\n    }\r\n\r\n    if (THREE_DIGIT_HEX_COLOR_WITH_HASH_REGEX.test(str)) {\r\n        return '#' + str[1] + str[1] + str[2] + str[2] + str[3] + str[3];\r\n    }\r\n\r\n    if (THREE_DIGIT_HEX_COLOR_REGEX.test(str)) {\r\n        return '#' + str[0] + str[0] + str[1] + str[1] + str[2] + str[2];\r\n    }\r\n\r\n    return null;\r\n}\r\n\r\n/**\r\n * Convert rgb color to 6 digits hex string.\r\n * @param color The rgb color to convert.\r\n */\r\nexport function rgb2sixDigitHex(color: RgbColor): string {\r\n    color.r = color.r.toString(16);\r\n    color.g = color.g.toString(16);\r\n    color.b = color.b.toString(16);\r\n\r\n    if (color.r.length === 1) {\r\n        color.r = '0' + color.r;\r\n    }\r\n\r\n    if (color.g.length === 1) {\r\n        color.g = '0' + color.g;\r\n    }\r\n\r\n    if (color.b.length === 1) {\r\n        color.b = '0' + color.b;\r\n    }\r\n\r\n    return '#' + color.r + color.g + color.b;\r\n}\r\n\r\n/**\r\n * Convert hex string to rgb color.\r\n * @param str The hex string to convert.\r\n */\r\nexport function hex2rgb(str: string): RgbColor {\r\n    const sixDigitHex = hex2sixDigitHex(str);\r\n\r\n    if (sixDigitHex === null) {\r\n        return null;\r\n    }\r\n\r\n    return {\r\n        r: parseInt(sixDigitHex.slice(1, 3), 16),\r\n        g: parseInt(sixDigitHex.slice(3, 5), 16),\r\n        b: parseInt(sixDigitHex.slice(5, 7), 16)\r\n    };\r\n}\r\n\r\nexport function rgbString2hsl(str: string): HslColor {\r\n    const sep = str.indexOf(',') > -1 ? ',' : ' ';\r\n    const rgbArr = str.substr(4).split(')')[0].split(sep);\r\n\r\n    const r = rgbArr[0];\r\n    const g = rgbArr[1].substr(0, rgbArr[1].length).trim();\r\n    const b = rgbArr[2].substr(0, rgbArr[2].length).trim();\r\n\r\n    return rgb2hsl({ r, g, b });\r\n}\r\n\r\nexport function rgb2hsl({ r, g, b }: RgbColor): HslColor {\r\n    r /= 255;\r\n    g /= 255;\r\n    b /= 255;\r\n\r\n    // Find greatest and smallest channel values\r\n    const cmin = Math.min(r, g, b);\r\n    const cmax = Math.max(r, g, b);\r\n    const delta = cmax - cmin;\r\n\r\n    let h = 0;\r\n    let s = 0;\r\n    let l = 0;\r\n\r\n    if (delta === 0) {\r\n        h = 0;\r\n    } else if (cmax === r) {\r\n        h = ((g - b) / delta) % 6;\r\n    } else if (cmax === g) {\r\n        h = (b - r) / delta + 2;\r\n    } else {\r\n        h = (r - g) / delta + 4;\r\n    }\r\n\r\n    h = Math.round(h * 60);\r\n\r\n    if (h < 0) {\r\n        h += 360;\r\n    }\r\n\r\n    l = (cmax + cmin) / 2;\r\n    s = delta === 0 ? 0 : delta / (1 - Math.abs(2 * l - 1));\r\n    s = +(s * 100).toFixed(1);\r\n    l = +(l * 100).toFixed(1);\r\n\r\n    return { h, s, l };\r\n}\r\n\r\nexport function hslString2hsl(str: string): HslColor {\r\n    const sep = str.indexOf(',') > -1 ? ',' : ' ';\r\n    const hslArr = str.substr(4).split(')')[0].split(sep);\r\n\r\n    let h: any = hslArr[0];\r\n    let s = hslArr[1].substr(0, hslArr[1].length).trim();\r\n    let l = hslArr[2].substr(0, hslArr[2].length).trim();\r\n\r\n    // Strip label and convert to degrees (if necessary)\r\n    if (h.indexOf('deg') > -1) {\r\n        h = h.substr(0, h.length - 3);\r\n    } else if (h.indexOf('rad') > -1) {\r\n        h = Math.round(h.substr(0, h.length - 3) * (180 / Math.PI));\r\n    } else if (h.indexOf('turn') > -1) {\r\n        h = Math.round(h.substr(0, h.length - 4) * 360);\r\n    }\r\n\r\n    // Keep hue fraction of 360 if ending up over\r\n    if (h >= 360) {\r\n        h %= 360;\r\n    }\r\n\r\n    // Remove the %\r\n    if (s.indexOf('%') > -1) {\r\n        s = s.replace(/%/g, '');\r\n    }\r\n\r\n    // Remove the %\r\n    if (l.indexOf('%') > -1) {\r\n        l = l.replace(/%/g, '');\r\n    }\r\n\r\n    return { h, s, l };\r\n}\r\n\r\nexport function hsl2rgb({ h, s, l }: HslColor): RgbColor {\r\n    let r;\r\n    let g;\r\n    let b;\r\n\r\n    if (!isFinite(h)) {\r\n        h = 0;\r\n    }\r\n\r\n    if (!isFinite(s)) {\r\n        s = 0;\r\n    }\r\n\r\n    if (!isFinite(l)) {\r\n        l = 0;\r\n    }\r\n\r\n    h /= 60;\r\n\r\n    if (h < 0) {\r\n        h = 6 - (-h % 6);\r\n    }\r\n\r\n    h %= 6;\r\n\r\n    s = Math.max(0, Math.min(1, s / 100));\r\n    l = Math.max(0, Math.min(1, l / 100));\r\n\r\n    const c = (1 - Math.abs((2 * l) - 1)) * s;\r\n    const x = c * (1 - Math.abs((h % 2) - 1));\r\n\r\n    if (h < 1) {\r\n        r = c;\r\n        g = x;\r\n        b = 0;\r\n    } else if (h < 2) {\r\n        r = x;\r\n        g = c;\r\n        b = 0;\r\n    } else if (h < 3) {\r\n        r = 0;\r\n        g = c;\r\n        b = x;\r\n    } else if (h < 4) {\r\n        r = 0;\r\n        g = x;\r\n        b = c;\r\n    } else if (h < 5) {\r\n        r = x;\r\n        g = 0;\r\n        b = c;\r\n    } else {\r\n        r = c;\r\n        g = 0;\r\n        b = x;\r\n    }\r\n\r\n    const m = l - c / 2;\r\n    r = Math.round((r + m) * 255);\r\n    g = Math.round((g + m) * 255);\r\n    b = Math.round((b + m) * 255);\r\n\r\n    return { r, g, b };\r\n}\r\n\r\nexport function hex2hsl(str: string): HslColor {\r\n    const sixDigitHex = hex2sixDigitHex(str);\r\n\r\n    if (sixDigitHex === null) {\r\n        return null;\r\n    }\r\n\r\n    const rgb = hex2rgb(sixDigitHex);\r\n\r\n    if (rgb === null) {\r\n        return null;\r\n    }\r\n\r\n    return rgb2hsl(rgb);\r\n}\r\n\r\nexport function hsl2hex(hsl: HslColor): string {\r\n    const rgb = hsl2rgb(hsl);\r\n\r\n    return rgb2sixDigitHex(rgb);\r\n}\r\n\r\nexport function relativeLuminance({ r, g, b }: RgbColor): number {\r\n    [r, g, b] = [r, g, b].map(c => {\r\n        c = c / 255;\r\n\r\n        if (c <= 0.03928) {\r\n            return c / 12.92;\r\n        }\r\n\r\n        return Math.pow((c + 0.055) / 1.055, 2.4);\r\n    });\r\n\r\n    return 0.2126 * r + 0.7152 * g + 0.0722 * b;\r\n}\r\n\r\nexport function contrast(str1: string, str2: string): number {\r\n    const L1 = relativeLuminance(hex2rgb(str1));\r\n    const L2 = relativeLuminance(hex2rgb(str2));\r\n\r\n    if (L1 < L2) {\r\n        return (L2 + 0.05) / (L1 + 0.05);\r\n    }\r\n\r\n    return (L1 + 0.05) / (L2 + 0.05);\r\n}\r\n\r\nexport function findClosestAccessibleDarkerColor(\r\n    adjustableColor: string, otherColor: string, contrastRatio: number): ClosestColor {\r\n    let { h, s, l } = hex2hsl(adjustableColor);\r\n\r\n    if (contrast(adjustableColor, otherColor) >= contrastRatio) {\r\n        return {\r\n            color: adjustableColor,\r\n            lightness: l\r\n        };\r\n    }\r\n\r\n    let minColor = hsl2hex({ h, s, l: 0 });\r\n\r\n    if (contrast(minColor, otherColor) < contrastRatio) {\r\n        return null;\r\n    }\r\n\r\n    let min = 0;\r\n    let max = l;\r\n    let maxColor = hsl2hex({ h, s, l });\r\n    let lastMinColor;\r\n    let lastMaxColor;\r\n\r\n    while (minColor !== lastMinColor || maxColor !== lastMaxColor) {\r\n        lastMinColor = minColor;\r\n        lastMaxColor = maxColor;\r\n\r\n        l = (min + max) / 2;\r\n        adjustableColor = hsl2hex({ h, s, l });\r\n\r\n        if (contrast(adjustableColor, otherColor) < contrastRatio) {\r\n            max = l;\r\n            maxColor = hsl2hex({ h, s, l });\r\n        } else {\r\n            min = l;\r\n            minColor = hsl2hex({ h, s, l });\r\n        }\r\n    }\r\n\r\n    return {\r\n        color: minColor,\r\n        lightness: min\r\n    };\r\n}\r\n\r\nexport function findClosestAccessibleLighterColor(\r\n    adjustableColor: string, otherColor: string, contrastRatio: number): ClosestColor {\r\n    let { h, s, l } = hex2hsl(adjustableColor);\r\n\r\n    if (contrast(adjustableColor, otherColor) >= contrastRatio) {\r\n        return {\r\n            color: adjustableColor,\r\n            lightness: l\r\n        };\r\n    }\r\n\r\n    let maxColor = hsl2hex({ h, s, l: 100 });\r\n\r\n    if (contrast(maxColor, otherColor) < contrastRatio) {\r\n        return null;\r\n    }\r\n\r\n    let min = l;\r\n    let max = 100;\r\n    let minColor = hsl2hex({ h, s, l });\r\n    let lastMinColor;\r\n    let lastMaxColor;\r\n\r\n    while (minColor !== lastMinColor || maxColor !== lastMaxColor) {\r\n        lastMinColor = minColor;\r\n        lastMaxColor = maxColor;\r\n\r\n        l = (min + max) / 2;\r\n        adjustableColor = hsl2hex({ h, s, l });\r\n\r\n        if (contrast(adjustableColor, otherColor) < contrastRatio) {\r\n            min = l;\r\n            minColor = hsl2hex({ h, s, l });\r\n        } else {\r\n            max = l;\r\n            maxColor = hsl2hex({ h, s, l });\r\n        }\r\n    }\r\n\r\n    return {\r\n        color: maxColor,\r\n        lightness: max\r\n    };\r\n}\r\n\r\nexport function findClosestAccessibleColor(\r\n    adjustableColor: string, otherColor: string, contrastRatio: number): string {\r\n    const closestDarkerColor: ClosestColor =\r\n        findClosestAccessibleDarkerColor(adjustableColor, otherColor, contrastRatio);\r\n    const closestLighterColor: ClosestColor =\r\n        findClosestAccessibleLighterColor(adjustableColor, otherColor, contrastRatio);\r\n\r\n    if (closestDarkerColor === null) {\r\n        if (closestLighterColor === null) {\r\n            return null;\r\n        }\r\n\r\n        return closestLighterColor.color;\r\n    }\r\n\r\n    if (closestLighterColor === null) {\r\n        return closestDarkerColor.color;\r\n    }\r\n\r\n    const { l } = hex2hsl(adjustableColor);\r\n\r\n    if (closestLighterColor.lightness - l < l - closestDarkerColor.lightness) {\r\n        return closestLighterColor.color;\r\n    }\r\n\r\n    return closestDarkerColor.color;\r\n}\r\n\r\nexport function convertHslToStringHsl(hsl: HslColor): string {\r\n    return 'hsl(' + (hsl.h < 0 ? hsl.h + 360 : hsl.h) + ', ' + hsl.s + '%, ' + hsl.l + '%)';\r\n}\r\n"]}