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  1. {"ast":null,"code":"\"use strict\";\n\nvar _interopRequireDefault = require(\"@babel/runtime/helpers/interopRequireDefault\");\n\nObject.defineProperty(exports, \"__esModule\", {\n value: true\n});\nexports.convertHexToRGB = convertHexToRGB;\nexports.rgbToHex = rgbToHex;\nexports.decomposeColor = decomposeColor;\nexports.recomposeColor = recomposeColor;\nexports.getContrastRatio = getContrastRatio;\nexports.getLuminance = getLuminance;\nexports.emphasize = emphasize;\nexports.fade = fade;\nexports.darken = darken;\nexports.lighten = lighten;\n\nvar _warning = _interopRequireDefault(require(\"warning\"));\n/* eslint-disable no-use-before-define */\n\n/**\n * Returns a number whose value is limited to the given range.\n *\n * @param {number} value The value to be clamped\n * @param {number} min The lower boundary of the output range\n * @param {number} max The upper boundary of the output range\n * @returns {number} A number in the range [min, max]\n */\n\n\nfunction clamp(value) {\n var min = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;\n var max = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 1;\n process.env.NODE_ENV !== \"production\" ? (0, _warning.default)(value >= min && value <= max, \"Material-UI: the value provided \".concat(value, \" is out of range [\").concat(min, \", \").concat(max, \"].\")) : void 0;\n\n if (value < min) {\n return min;\n }\n\n if (value > max) {\n return max;\n }\n\n return value;\n}\n/**\n * Converts a color from CSS hex format to CSS rgb format.\n *\n * @param {string} color - Hex color, i.e. #nnn or #nnnnnn\n * @returns {string} A CSS rgb color string\n */\n\n\nfunction convertHexToRGB(color) {\n color = color.substr(1);\n var re = new RegExp(\".{1,\".concat(color.length / 3, \"}\"), 'g');\n var colors = color.match(re);\n\n if (colors && colors[0].length === 1) {\n colors = colors.map(function (n) {\n return n + n;\n });\n }\n\n return colors ? \"rgb(\".concat(colors.map(function (n) {\n return parseInt(n, 16);\n }).join(', '), \")\") : '';\n}\n/**\n * Converts a color from CSS rgb format to CSS hex format.\n *\n * @param {string} color - RGB color, i.e. rgb(n, n, n)\n * @returns {string} A CSS rgb color string, i.e. #nnnnnn\n */\n\n\nfunction rgbToHex(color) {\n // Pass hex straight through\n if (color.indexOf('#') === 0) {\n return color;\n }\n\n function intToHex(c) {\n var hex = c.toString(16);\n return hex.length === 1 ? \"0\".concat(hex) : hex;\n }\n\n var _decomposeColor = decomposeColor(color),\n values = _decomposeColor.values;\n\n values = values.map(function (n) {\n return intToHex(n);\n });\n return \"#\".concat(values.join(''));\n}\n/**\n * Returns an object with the type and values of a color.\n *\n * Note: Does not support rgb % values.\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @returns {object} - A MUI color object: {type: string, values: number[]}\n */\n\n\nfunction decomposeColor(color) {\n if (color.charAt(0) === '#') {\n return decomposeColor(convertHexToRGB(color));\n }\n\n var marker = color.indexOf('(');\n var type = color.substring(0, marker);\n var values = color.substring(marker + 1, color.length - 1).split(',');\n values = values.map(function (value) {\n return parseFloat(value);\n });\n\n if (process.env.NODE_ENV !== 'production') {\n if (['rgb', 'rgba', 'hsl', 'hsla'].indexOf(type) === -1) {\n throw new Error([\"Material-UI: unsupported `\".concat(color, \"` color.\"), 'We support the following formats: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla().'].join('\\n'));\n }\n }\n\n return {\n type: type,\n values: values\n };\n}\n/**\n * Converts a color object with type and values to a string.\n *\n * @param {object} color - Decomposed color\n * @param {string} color.type - One of: 'rgb', 'rgba', 'hsl', 'hsla'\n * @param {array} color.values - [n,n,n] or [n,n,n,n]\n * @returns {string} A CSS color string\n */\n\n\nfunction recomposeColor(color) {\n var type = color.type;\n var values = color.values;\n\n if (type.indexOf('rgb') !== -1) {\n // Only convert the first 3 values to int (i.e. not alpha)\n values = values.map(function (n, i) {\n return i < 3 ? parseInt(n, 10) : n;\n });\n }\n\n if (type.indexOf('hsl') !== -1) {\n values[1] = \"\".concat(values[1], \"%\");\n values[2] = \"\".concat(values[2], \"%\");\n }\n\n return \"\".concat(color.type, \"(\").concat(values.join(', '), \")\");\n}\n/**\n * Calculates the contrast ratio between two colors.\n *\n * Formula: https://www.w3.org/TR/WCAG20-TECHS/G17.html#G17-tests\n *\n * @param {string} foreground - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @param {string} background - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @returns {number} A contrast ratio value in the range 0 - 21.\n */\n\n\nfunction getContrastRatio(foreground, background) {\n var lumA = getLuminance(foreground);\n var lumB = getLuminance(background);\n return (Math.max(lumA, lumB) + 0.05) / (Math.min(lumA, lumB) + 0.05);\n}\n/**\n * The relative brightness of any point in a color space,\n * normalized to 0 for darkest black and 1 for lightest white.\n *\n * Formula: https://www.w3.org/TR/WCAG20-TECHS/G17.html#G17-tests\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @returns {number} The relative brightness of the color in the range 0 - 1\n */\n\n\nfunction getLuminance(color) {\n var decomposedColor = decomposeColor(color);\n\n if (decomposedColor.type.indexOf('rgb') !== -1) {\n var rgb = decomposedColor.values.map(function (val) {\n val /= 255; // normalized\n\n return val <= 0.03928 ? val / 12.92 : Math.pow((val + 0.055) / 1.055, 2.4);\n }); // Truncate at 3 digits\n\n return Number((0.2126 * rgb[0] + 0.7152 * rgb[1] + 0.0722 * rgb[2]).toFixed(3));\n } // else if (decomposedColor.type.indexOf('hsl') !== -1)\n\n\n return decomposedColor.values[2] / 100;\n}\n/**\n * Darken or lighten a colour, depending on its luminance.\n * Light colors are darkened, dark colors are lightened.\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @param {number} coefficient=0.15 - multiplier in the range 0 - 1\n * @returns {string} A CSS color string. Hex input values are returned as rgb\n */\n\n\nfunction emphasize(color) {\n var coefficient = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0.15;\n return getLuminance(color) > 0.5 ? darken(color, coefficient) : lighten(color, coefficient);\n}\n/**\n * Set the absolute transparency of a color.\n * Any existing alpha values are overwritten.\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @param {number} value - value to set the alpha channel to in the range 0 -1\n * @returns {string} A CSS color string. Hex input values are returned as rgb\n */\n\n\nfunction fade(color, value) {\n process.env.NODE_ENV !== \"production\" ? (0, _warning.default)(color, \"Material-UI: missing color argument in fade(\".concat(color, \", \").concat(value, \").\")) : void 0;\n if (!color) return color;\n color = decomposeColor(color);\n value = clamp(value);\n\n if (color.type === 'rgb' || color.type === 'hsl') {\n color.type += 'a';\n }\n\n color.values[3] = value;\n return recomposeColor(color);\n}\n/**\n * Darkens a color.\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @param {number} coefficient - multiplier in the range 0 - 1\n * @returns {string} A CSS color string. Hex input values are returned as rgb\n */\n\n\nfunction darken(color, coefficient) {\n process.env.NODE_ENV !== \"production\" ? (0, _warning.default)(color, \"Material-UI: missing color argument in darken(\".concat(color, \", \").concat(coefficient, \").\")) : void 0;\n if (!color) return color;\n color = decomposeColor(color);\n coefficient = clamp(coefficient);\n\n if (color.type.indexOf('hsl') !== -1) {\n color.values[2] *= 1 - coefficient;\n } else if (color.type.indexOf('rgb') !== -1) {\n for (var i = 0; i < 3; i += 1) {\n color.values[i] *= 1 - coefficient;\n }\n }\n\n return recomposeColor(color);\n}\n/**\n * Lightens a color.\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @param {number} coefficient - multiplier in the range 0 - 1\n * @returns {string} A CSS color string. Hex input values are returned as rgb\n */\n\n\nfunction lighten(color, coefficient) {\n process.env.NODE_ENV !== \"production\" ? (0, _warning.default)(color, \"Material-UI: missing color argument in lighten(\".concat(color, \", \").concat(coefficient, \").\")) : void 0;\n if (!color) return color;\n color = decomposeColor(color);\n coefficient = clamp(coefficient);\n\n if (color.type.indexOf('hsl') !== -1) {\n color.values[2] += (100 - color.values[2]) * coefficient;\n } else if (color.type.indexOf('rgb') !== -1) {\n for (var i = 0; i < 3; i += 1) {\n color.values[i] += (255 - color.values[i]) * coefficient;\n }\n }\n\n return recomposeColor(color);\n}","map":null,"metadata":{},"sourceType":"script"}