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Filename : tinycolor.js
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// This file is autogenerated. It's used to publish ESM to npm.
function _typeof(obj) {
  "@babel/helpers - typeof";

  return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
    return typeof obj;
  } : function (obj) {
    return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
  }, _typeof(obj);
}

// https://github.com/bgrins/TinyColor
// Brian Grinstead, MIT License

var trimLeft = /^\s+/;
var trimRight = /\s+$/;
function tinycolor(color, opts) {
  color = color ? color : "";
  opts = opts || {};

  // If input is already a tinycolor, return itself
  if (color instanceof tinycolor) {
    return color;
  }
  // If we are called as a function, call using new instead
  if (!(this instanceof tinycolor)) {
    return new tinycolor(color, opts);
  }
  var rgb = inputToRGB(color);
  this._originalInput = color, this._r = rgb.r, this._g = rgb.g, this._b = rgb.b, this._a = rgb.a, this._roundA = Math.round(100 * this._a) / 100, this._format = opts.format || rgb.format;
  this._gradientType = opts.gradientType;

  // Don't let the range of [0,255] come back in [0,1].
  // Potentially lose a little bit of precision here, but will fix issues where
  // .5 gets interpreted as half of the total, instead of half of 1
  // If it was supposed to be 128, this was already taken care of by `inputToRgb`
  if (this._r < 1) this._r = Math.round(this._r);
  if (this._g < 1) this._g = Math.round(this._g);
  if (this._b < 1) this._b = Math.round(this._b);
  this._ok = rgb.ok;
}
tinycolor.prototype = {
  isDark: function isDark() {
    return this.getBrightness() < 128;
  },
  isLight: function isLight() {
    return !this.isDark();
  },
  isValid: function isValid() {
    return this._ok;
  },
  getOriginalInput: function getOriginalInput() {
    return this._originalInput;
  },
  getFormat: function getFormat() {
    return this._format;
  },
  getAlpha: function getAlpha() {
    return this._a;
  },
  getBrightness: function getBrightness() {
    //http://www.w3.org/TR/AERT#color-contrast
    var rgb = this.toRgb();
    return (rgb.r * 299 + rgb.g * 587 + rgb.b * 114) / 1000;
  },
  getLuminance: function getLuminance() {
    //http://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef
    var rgb = this.toRgb();
    var RsRGB, GsRGB, BsRGB, R, G, B;
    RsRGB = rgb.r / 255;
    GsRGB = rgb.g / 255;
    BsRGB = rgb.b / 255;
    if (RsRGB <= 0.03928) R = RsRGB / 12.92;else R = Math.pow((RsRGB + 0.055) / 1.055, 2.4);
    if (GsRGB <= 0.03928) G = GsRGB / 12.92;else G = Math.pow((GsRGB + 0.055) / 1.055, 2.4);
    if (BsRGB <= 0.03928) B = BsRGB / 12.92;else B = Math.pow((BsRGB + 0.055) / 1.055, 2.4);
    return 0.2126 * R + 0.7152 * G + 0.0722 * B;
  },
  setAlpha: function setAlpha(value) {
    this._a = boundAlpha(value);
    this._roundA = Math.round(100 * this._a) / 100;
    return this;
  },
  toHsv: function toHsv() {
    var hsv = rgbToHsv(this._r, this._g, this._b);
    return {
      h: hsv.h * 360,
      s: hsv.s,
      v: hsv.v,
      a: this._a
    };
  },
  toHsvString: function toHsvString() {
    var hsv = rgbToHsv(this._r, this._g, this._b);
    var h = Math.round(hsv.h * 360),
      s = Math.round(hsv.s * 100),
      v = Math.round(hsv.v * 100);
    return this._a == 1 ? "hsv(" + h + ", " + s + "%, " + v + "%)" : "hsva(" + h + ", " + s + "%, " + v + "%, " + this._roundA + ")";
  },
  toHsl: function toHsl() {
    var hsl = rgbToHsl(this._r, this._g, this._b);
    return {
      h: hsl.h * 360,
      s: hsl.s,
      l: hsl.l,
      a: this._a
    };
  },
  toHslString: function toHslString() {
    var hsl = rgbToHsl(this._r, this._g, this._b);
    var h = Math.round(hsl.h * 360),
      s = Math.round(hsl.s * 100),
      l = Math.round(hsl.l * 100);
    return this._a == 1 ? "hsl(" + h + ", " + s + "%, " + l + "%)" : "hsla(" + h + ", " + s + "%, " + l + "%, " + this._roundA + ")";
  },
  toHex: function toHex(allow3Char) {
    return rgbToHex(this._r, this._g, this._b, allow3Char);
  },
  toHexString: function toHexString(allow3Char) {
    return "#" + this.toHex(allow3Char);
  },
  toHex8: function toHex8(allow4Char) {
    return rgbaToHex(this._r, this._g, this._b, this._a, allow4Char);
  },
  toHex8String: function toHex8String(allow4Char) {
    return "#" + this.toHex8(allow4Char);
  },
  toRgb: function toRgb() {
    return {
      r: Math.round(this._r),
      g: Math.round(this._g),
      b: Math.round(this._b),
      a: this._a
    };
  },
  toRgbString: function toRgbString() {
    return this._a == 1 ? "rgb(" + Math.round(this._r) + ", " + Math.round(this._g) + ", " + Math.round(this._b) + ")" : "rgba(" + Math.round(this._r) + ", " + Math.round(this._g) + ", " + Math.round(this._b) + ", " + this._roundA + ")";
  },
  toPercentageRgb: function toPercentageRgb() {
    return {
      r: Math.round(bound01(this._r, 255) * 100) + "%",
      g: Math.round(bound01(this._g, 255) * 100) + "%",
      b: Math.round(bound01(this._b, 255) * 100) + "%",
      a: this._a
    };
  },
  toPercentageRgbString: function toPercentageRgbString() {
    return this._a == 1 ? "rgb(" + Math.round(bound01(this._r, 255) * 100) + "%, " + Math.round(bound01(this._g, 255) * 100) + "%, " + Math.round(bound01(this._b, 255) * 100) + "%)" : "rgba(" + Math.round(bound01(this._r, 255) * 100) + "%, " + Math.round(bound01(this._g, 255) * 100) + "%, " + Math.round(bound01(this._b, 255) * 100) + "%, " + this._roundA + ")";
  },
  toName: function toName() {
    if (this._a === 0) {
      return "transparent";
    }
    if (this._a < 1) {
      return false;
    }
    return hexNames[rgbToHex(this._r, this._g, this._b, true)] || false;
  },
  toFilter: function toFilter(secondColor) {
    var hex8String = "#" + rgbaToArgbHex(this._r, this._g, this._b, this._a);
    var secondHex8String = hex8String;
    var gradientType = this._gradientType ? "GradientType = 1, " : "";
    if (secondColor) {
      var s = tinycolor(secondColor);
      secondHex8String = "#" + rgbaToArgbHex(s._r, s._g, s._b, s._a);
    }
    return "progid:DXImageTransform.Microsoft.gradient(" + gradientType + "startColorstr=" + hex8String + ",endColorstr=" + secondHex8String + ")";
  },
  toString: function toString(format) {
    var formatSet = !!format;
    format = format || this._format;
    var formattedString = false;
    var hasAlpha = this._a < 1 && this._a >= 0;
    var needsAlphaFormat = !formatSet && hasAlpha && (format === "hex" || format === "hex6" || format === "hex3" || format === "hex4" || format === "hex8" || format === "name");
    if (needsAlphaFormat) {
      // Special case for "transparent", all other non-alpha formats
      // will return rgba when there is transparency.
      if (format === "name" && this._a === 0) {
        return this.toName();
      }
      return this.toRgbString();
    }
    if (format === "rgb") {
      formattedString = this.toRgbString();
    }
    if (format === "prgb") {
      formattedString = this.toPercentageRgbString();
    }
    if (format === "hex" || format === "hex6") {
      formattedString = this.toHexString();
    }
    if (format === "hex3") {
      formattedString = this.toHexString(true);
    }
    if (format === "hex4") {
      formattedString = this.toHex8String(true);
    }
    if (format === "hex8") {
      formattedString = this.toHex8String();
    }
    if (format === "name") {
      formattedString = this.toName();
    }
    if (format === "hsl") {
      formattedString = this.toHslString();
    }
    if (format === "hsv") {
      formattedString = this.toHsvString();
    }
    return formattedString || this.toHexString();
  },
  clone: function clone() {
    return tinycolor(this.toString());
  },
  _applyModification: function _applyModification(fn, args) {
    var color = fn.apply(null, [this].concat([].slice.call(args)));
    this._r = color._r;
    this._g = color._g;
    this._b = color._b;
    this.setAlpha(color._a);
    return this;
  },
  lighten: function lighten() {
    return this._applyModification(_lighten, arguments);
  },
  brighten: function brighten() {
    return this._applyModification(_brighten, arguments);
  },
  darken: function darken() {
    return this._applyModification(_darken, arguments);
  },
  desaturate: function desaturate() {
    return this._applyModification(_desaturate, arguments);
  },
  saturate: function saturate() {
    return this._applyModification(_saturate, arguments);
  },
  greyscale: function greyscale() {
    return this._applyModification(_greyscale, arguments);
  },
  spin: function spin() {
    return this._applyModification(_spin, arguments);
  },
  _applyCombination: function _applyCombination(fn, args) {
    return fn.apply(null, [this].concat([].slice.call(args)));
  },
  analogous: function analogous() {
    return this._applyCombination(_analogous, arguments);
  },
  complement: function complement() {
    return this._applyCombination(_complement, arguments);
  },
  monochromatic: function monochromatic() {
    return this._applyCombination(_monochromatic, arguments);
  },
  splitcomplement: function splitcomplement() {
    return this._applyCombination(_splitcomplement, arguments);
  },
  // Disabled until https://github.com/bgrins/TinyColor/issues/254
  // polyad: function (number) {
  //   return this._applyCombination(polyad, [number]);
  // },
  triad: function triad() {
    return this._applyCombination(polyad, [3]);
  },
  tetrad: function tetrad() {
    return this._applyCombination(polyad, [4]);
  }
};

// If input is an object, force 1 into "1.0" to handle ratios properly
// String input requires "1.0" as input, so 1 will be treated as 1
tinycolor.fromRatio = function (color, opts) {
  if (_typeof(color) == "object") {
    var newColor = {};
    for (var i in color) {
      if (color.hasOwnProperty(i)) {
        if (i === "a") {
          newColor[i] = color[i];
        } else {
          newColor[i] = convertToPercentage(color[i]);
        }
      }
    }
    color = newColor;
  }
  return tinycolor(color, opts);
};

// Given a string or object, convert that input to RGB
// Possible string inputs:
//
//     "red"
//     "#f00" or "f00"
//     "#ff0000" or "ff0000"
//     "#ff000000" or "ff000000"
//     "rgb 255 0 0" or "rgb (255, 0, 0)"
//     "rgb 1.0 0 0" or "rgb (1, 0, 0)"
//     "rgba (255, 0, 0, 1)" or "rgba 255, 0, 0, 1"
//     "rgba (1.0, 0, 0, 1)" or "rgba 1.0, 0, 0, 1"
//     "hsl(0, 100%, 50%)" or "hsl 0 100% 50%"
//     "hsla(0, 100%, 50%, 1)" or "hsla 0 100% 50%, 1"
//     "hsv(0, 100%, 100%)" or "hsv 0 100% 100%"
//
function inputToRGB(color) {
  var rgb = {
    r: 0,
    g: 0,
    b: 0
  };
  var a = 1;
  var s = null;
  var v = null;
  var l = null;
  var ok = false;
  var format = false;
  if (typeof color == "string") {
    color = stringInputToObject(color);
  }
  if (_typeof(color) == "object") {
    if (isValidCSSUnit(color.r) && isValidCSSUnit(color.g) && isValidCSSUnit(color.b)) {
      rgb = rgbToRgb(color.r, color.g, color.b);
      ok = true;
      format = String(color.r).substr(-1) === "%" ? "prgb" : "rgb";
    } else if (isValidCSSUnit(color.h) && isValidCSSUnit(color.s) && isValidCSSUnit(color.v)) {
      s = convertToPercentage(color.s);
      v = convertToPercentage(color.v);
      rgb = hsvToRgb(color.h, s, v);
      ok = true;
      format = "hsv";
    } else if (isValidCSSUnit(color.h) && isValidCSSUnit(color.s) && isValidCSSUnit(color.l)) {
      s = convertToPercentage(color.s);
      l = convertToPercentage(color.l);
      rgb = hslToRgb(color.h, s, l);
      ok = true;
      format = "hsl";
    }
    if (color.hasOwnProperty("a")) {
      a = color.a;
    }
  }
  a = boundAlpha(a);
  return {
    ok: ok,
    format: color.format || format,
    r: Math.min(255, Math.max(rgb.r, 0)),
    g: Math.min(255, Math.max(rgb.g, 0)),
    b: Math.min(255, Math.max(rgb.b, 0)),
    a: a
  };
}

// Conversion Functions
// --------------------

// `rgbToHsl`, `rgbToHsv`, `hslToRgb`, `hsvToRgb` modified from:
// <http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript>

// `rgbToRgb`
// Handle bounds / percentage checking to conform to CSS color spec
// <http://www.w3.org/TR/css3-color/>
// *Assumes:* r, g, b in [0, 255] or [0, 1]
// *Returns:* { r, g, b } in [0, 255]
function rgbToRgb(r, g, b) {
  return {
    r: bound01(r, 255) * 255,
    g: bound01(g, 255) * 255,
    b: bound01(b, 255) * 255
  };
}

// `rgbToHsl`
// Converts an RGB color value to HSL.
// *Assumes:* r, g, and b are contained in [0, 255] or [0, 1]
// *Returns:* { h, s, l } in [0,1]
function rgbToHsl(r, g, b) {
  r = bound01(r, 255);
  g = bound01(g, 255);
  b = bound01(b, 255);
  var max = Math.max(r, g, b),
    min = Math.min(r, g, b);
  var h,
    s,
    l = (max + min) / 2;
  if (max == min) {
    h = s = 0; // achromatic
  } else {
    var 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,
    s: s,
    l: l
  };
}

// `hslToRgb`
// Converts an HSL color value to RGB.
// *Assumes:* h is contained in [0, 1] or [0, 360] and s and l are contained [0, 1] or [0, 100]
// *Returns:* { r, g, b } in the set [0, 255]
function hslToRgb(h, s, l) {
  var r, g, b;
  h = bound01(h, 360);
  s = bound01(s, 100);
  l = bound01(l, 100);
  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;
  }
  if (s === 0) {
    r = g = b = l; // achromatic
  } else {
    var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
    var 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: r * 255,
    g: g * 255,
    b: b * 255
  };
}

// `rgbToHsv`
// Converts an RGB color value to HSV
// *Assumes:* r, g, and b are contained in the set [0, 255] or [0, 1]
// *Returns:* { h, s, v } in [0,1]
function rgbToHsv(r, g, b) {
  r = bound01(r, 255);
  g = bound01(g, 255);
  b = bound01(b, 255);
  var max = Math.max(r, g, b),
    min = Math.min(r, g, b);
  var h,
    s,
    v = max;
  var d = max - min;
  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,
    s: s,
    v: v
  };
}

// `hsvToRgb`
// Converts an HSV color value to RGB.
// *Assumes:* h is contained in [0, 1] or [0, 360] and s and v are contained in [0, 1] or [0, 100]
// *Returns:* { r, g, b } in the set [0, 255]
function hsvToRgb(h, s, v) {
  h = bound01(h, 360) * 6;
  s = bound01(s, 100);
  v = bound01(v, 100);
  var 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
  };
}

// `rgbToHex`
// Converts an RGB color to hex
// Assumes r, g, and b are contained in the set [0, 255]
// Returns a 3 or 6 character hex
function rgbToHex(r, g, b, allow3Char) {
  var hex = [pad2(Math.round(r).toString(16)), pad2(Math.round(g).toString(16)), pad2(Math.round(b).toString(16))];

  // Return a 3 character hex if possible
  if (allow3Char && hex[0].charAt(0) == hex[0].charAt(1) && hex[1].charAt(0) == hex[1].charAt(1) && hex[2].charAt(0) == hex[2].charAt(1)) {
    return hex[0].charAt(0) + hex[1].charAt(0) + hex[2].charAt(0);
  }
  return hex.join("");
}

// `rgbaToHex`
// Converts an RGBA color plus alpha transparency to hex
// Assumes r, g, b are contained in the set [0, 255] and
// a in [0, 1]. Returns a 4 or 8 character rgba hex
function rgbaToHex(r, g, b, a, allow4Char) {
  var hex = [pad2(Math.round(r).toString(16)), pad2(Math.round(g).toString(16)), pad2(Math.round(b).toString(16)), pad2(convertDecimalToHex(a))];

  // Return a 4 character hex if possible
  if (allow4Char && hex[0].charAt(0) == hex[0].charAt(1) && hex[1].charAt(0) == hex[1].charAt(1) && hex[2].charAt(0) == hex[2].charAt(1) && hex[3].charAt(0) == hex[3].charAt(1)) {
    return hex[0].charAt(0) + hex[1].charAt(0) + hex[2].charAt(0) + hex[3].charAt(0);
  }
  return hex.join("");
}

// `rgbaToArgbHex`
// Converts an RGBA color to an ARGB Hex8 string
// Rarely used, but required for "toFilter()"
function rgbaToArgbHex(r, g, b, a) {
  var hex = [pad2(convertDecimalToHex(a)), pad2(Math.round(r).toString(16)), pad2(Math.round(g).toString(16)), pad2(Math.round(b).toString(16))];
  return hex.join("");
}

// `equals`
// Can be called with any tinycolor input
tinycolor.equals = function (color1, color2) {
  if (!color1 || !color2) return false;
  return tinycolor(color1).toRgbString() == tinycolor(color2).toRgbString();
};
tinycolor.random = function () {
  return tinycolor.fromRatio({
    r: Math.random(),
    g: Math.random(),
    b: Math.random()
  });
};

// Modification Functions
// ----------------------
// Thanks to less.js for some of the basics here
// <https://github.com/cloudhead/less.js/blob/master/lib/less/functions.js>

function _desaturate(color, amount) {
  amount = amount === 0 ? 0 : amount || 10;
  var hsl = tinycolor(color).toHsl();
  hsl.s -= amount / 100;
  hsl.s = clamp01(hsl.s);
  return tinycolor(hsl);
}
function _saturate(color, amount) {
  amount = amount === 0 ? 0 : amount || 10;
  var hsl = tinycolor(color).toHsl();
  hsl.s += amount / 100;
  hsl.s = clamp01(hsl.s);
  return tinycolor(hsl);
}
function _greyscale(color) {
  return tinycolor(color).desaturate(100);
}
function _lighten(color, amount) {
  amount = amount === 0 ? 0 : amount || 10;
  var hsl = tinycolor(color).toHsl();
  hsl.l += amount / 100;
  hsl.l = clamp01(hsl.l);
  return tinycolor(hsl);
}
function _brighten(color, amount) {
  amount = amount === 0 ? 0 : amount || 10;
  var rgb = tinycolor(color).toRgb();
  rgb.r = Math.max(0, Math.min(255, rgb.r - Math.round(255 * -(amount / 100))));
  rgb.g = Math.max(0, Math.min(255, rgb.g - Math.round(255 * -(amount / 100))));
  rgb.b = Math.max(0, Math.min(255, rgb.b - Math.round(255 * -(amount / 100))));
  return tinycolor(rgb);
}
function _darken(color, amount) {
  amount = amount === 0 ? 0 : amount || 10;
  var hsl = tinycolor(color).toHsl();
  hsl.l -= amount / 100;
  hsl.l = clamp01(hsl.l);
  return tinycolor(hsl);
}

// Spin takes a positive or negative amount within [-360, 360] indicating the change of hue.
// Values outside of this range will be wrapped into this range.
function _spin(color, amount) {
  var hsl = tinycolor(color).toHsl();
  var hue = (hsl.h + amount) % 360;
  hsl.h = hue < 0 ? 360 + hue : hue;
  return tinycolor(hsl);
}

// Combination Functions
// ---------------------
// Thanks to jQuery xColor for some of the ideas behind these
// <https://github.com/infusion/jQuery-xcolor/blob/master/jquery.xcolor.js>

function _complement(color) {
  var hsl = tinycolor(color).toHsl();
  hsl.h = (hsl.h + 180) % 360;
  return tinycolor(hsl);
}
function polyad(color, number) {
  if (isNaN(number) || number <= 0) {
    throw new Error("Argument to polyad must be a positive number");
  }
  var hsl = tinycolor(color).toHsl();
  var result = [tinycolor(color)];
  var step = 360 / number;
  for (var i = 1; i < number; i++) {
    result.push(tinycolor({
      h: (hsl.h + i * step) % 360,
      s: hsl.s,
      l: hsl.l
    }));
  }
  return result;
}
function _splitcomplement(color) {
  var hsl = tinycolor(color).toHsl();
  var h = hsl.h;
  return [tinycolor(color), tinycolor({
    h: (h + 72) % 360,
    s: hsl.s,
    l: hsl.l
  }), tinycolor({
    h: (h + 216) % 360,
    s: hsl.s,
    l: hsl.l
  })];
}
function _analogous(color, results, slices) {
  results = results || 6;
  slices = slices || 30;
  var hsl = tinycolor(color).toHsl();
  var part = 360 / slices;
  var ret = [tinycolor(color)];
  for (hsl.h = (hsl.h - (part * results >> 1) + 720) % 360; --results;) {
    hsl.h = (hsl.h + part) % 360;
    ret.push(tinycolor(hsl));
  }
  return ret;
}
function _monochromatic(color, results) {
  results = results || 6;
  var hsv = tinycolor(color).toHsv();
  var h = hsv.h,
    s = hsv.s,
    v = hsv.v;
  var ret = [];
  var modification = 1 / results;
  while (results--) {
    ret.push(tinycolor({
      h: h,
      s: s,
      v: v
    }));
    v = (v + modification) % 1;
  }
  return ret;
}

// Utility Functions
// ---------------------

tinycolor.mix = function (color1, color2, amount) {
  amount = amount === 0 ? 0 : amount || 50;
  var rgb1 = tinycolor(color1).toRgb();
  var rgb2 = tinycolor(color2).toRgb();
  var p = amount / 100;
  var rgba = {
    r: (rgb2.r - rgb1.r) * p + rgb1.r,
    g: (rgb2.g - rgb1.g) * p + rgb1.g,
    b: (rgb2.b - rgb1.b) * p + rgb1.b,
    a: (rgb2.a - rgb1.a) * p + rgb1.a
  };
  return tinycolor(rgba);
};

// Readability Functions
// ---------------------
// <http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef (WCAG Version 2)

// `contrast`
// Analyze the 2 colors and returns the color contrast defined by (WCAG Version 2)
tinycolor.readability = function (color1, color2) {
  var c1 = tinycolor(color1);
  var c2 = tinycolor(color2);
  return (Math.max(c1.getLuminance(), c2.getLuminance()) + 0.05) / (Math.min(c1.getLuminance(), c2.getLuminance()) + 0.05);
};

// `isReadable`
// Ensure that foreground and background color combinations meet WCAG2 guidelines.
// The third argument is an optional Object.
//      the 'level' property states 'AA' or 'AAA' - if missing or invalid, it defaults to 'AA';
//      the 'size' property states 'large' or 'small' - if missing or invalid, it defaults to 'small'.
// If the entire object is absent, isReadable defaults to {level:"AA",size:"small"}.

// *Example*
//    tinycolor.isReadable("#000", "#111") => false
//    tinycolor.isReadable("#000", "#111",{level:"AA",size:"large"}) => false
tinycolor.isReadable = function (color1, color2, wcag2) {
  var readability = tinycolor.readability(color1, color2);
  var wcag2Parms, out;
  out = false;
  wcag2Parms = validateWCAG2Parms(wcag2);
  switch (wcag2Parms.level + wcag2Parms.size) {
    case "AAsmall":
    case "AAAlarge":
      out = readability >= 4.5;
      break;
    case "AAlarge":
      out = readability >= 3;
      break;
    case "AAAsmall":
      out = readability >= 7;
      break;
  }
  return out;
};

// `mostReadable`
// Given a base color and a list of possible foreground or background
// colors for that base, returns the most readable color.
// Optionally returns Black or White if the most readable color is unreadable.
// *Example*
//    tinycolor.mostReadable(tinycolor.mostReadable("#123", ["#124", "#125"],{includeFallbackColors:false}).toHexString(); // "#112255"
//    tinycolor.mostReadable(tinycolor.mostReadable("#123", ["#124", "#125"],{includeFallbackColors:true}).toHexString();  // "#ffffff"
//    tinycolor.mostReadable("#a8015a", ["#faf3f3"],{includeFallbackColors:true,level:"AAA",size:"large"}).toHexString(); // "#faf3f3"
//    tinycolor.mostReadable("#a8015a", ["#faf3f3"],{includeFallbackColors:true,level:"AAA",size:"small"}).toHexString(); // "#ffffff"
tinycolor.mostReadable = function (baseColor, colorList, args) {
  var bestColor = null;
  var bestScore = 0;
  var readability;
  var includeFallbackColors, level, size;
  args = args || {};
  includeFallbackColors = args.includeFallbackColors;
  level = args.level;
  size = args.size;
  for (var i = 0; i < colorList.length; i++) {
    readability = tinycolor.readability(baseColor, colorList[i]);
    if (readability > bestScore) {
      bestScore = readability;
      bestColor = tinycolor(colorList[i]);
    }
  }
  if (tinycolor.isReadable(baseColor, bestColor, {
    level: level,
    size: size
  }) || !includeFallbackColors) {
    return bestColor;
  } else {
    args.includeFallbackColors = false;
    return tinycolor.mostReadable(baseColor, ["#fff", "#000"], args);
  }
};

// Big List of Colors
// ------------------
// <https://www.w3.org/TR/css-color-4/#named-colors>
var names = tinycolor.names = {
  aliceblue: "f0f8ff",
  antiquewhite: "faebd7",
  aqua: "0ff",
  aquamarine: "7fffd4",
  azure: "f0ffff",
  beige: "f5f5dc",
  bisque: "ffe4c4",
  black: "000",
  blanchedalmond: "ffebcd",
  blue: "00f",
  blueviolet: "8a2be2",
  brown: "a52a2a",
  burlywood: "deb887",
  burntsienna: "ea7e5d",
  cadetblue: "5f9ea0",
  chartreuse: "7fff00",
  chocolate: "d2691e",
  coral: "ff7f50",
  cornflowerblue: "6495ed",
  cornsilk: "fff8dc",
  crimson: "dc143c",
  cyan: "0ff",
  darkblue: "00008b",
  darkcyan: "008b8b",
  darkgoldenrod: "b8860b",
  darkgray: "a9a9a9",
  darkgreen: "006400",
  darkgrey: "a9a9a9",
  darkkhaki: "bdb76b",
  darkmagenta: "8b008b",
  darkolivegreen: "556b2f",
  darkorange: "ff8c00",
  darkorchid: "9932cc",
  darkred: "8b0000",
  darksalmon: "e9967a",
  darkseagreen: "8fbc8f",
  darkslateblue: "483d8b",
  darkslategray: "2f4f4f",
  darkslategrey: "2f4f4f",
  darkturquoise: "00ced1",
  darkviolet: "9400d3",
  deeppink: "ff1493",
  deepskyblue: "00bfff",
  dimgray: "696969",
  dimgrey: "696969",
  dodgerblue: "1e90ff",
  firebrick: "b22222",
  floralwhite: "fffaf0",
  forestgreen: "228b22",
  fuchsia: "f0f",
  gainsboro: "dcdcdc",
  ghostwhite: "f8f8ff",
  gold: "ffd700",
  goldenrod: "daa520",
  gray: "808080",
  green: "008000",
  greenyellow: "adff2f",
  grey: "808080",
  honeydew: "f0fff0",
  hotpink: "ff69b4",
  indianred: "cd5c5c",
  indigo: "4b0082",
  ivory: "fffff0",
  khaki: "f0e68c",
  lavender: "e6e6fa",
  lavenderblush: "fff0f5",
  lawngreen: "7cfc00",
  lemonchiffon: "fffacd",
  lightblue: "add8e6",
  lightcoral: "f08080",
  lightcyan: "e0ffff",
  lightgoldenrodyellow: "fafad2",
  lightgray: "d3d3d3",
  lightgreen: "90ee90",
  lightgrey: "d3d3d3",
  lightpink: "ffb6c1",
  lightsalmon: "ffa07a",
  lightseagreen: "20b2aa",
  lightskyblue: "87cefa",
  lightslategray: "789",
  lightslategrey: "789",
  lightsteelblue: "b0c4de",
  lightyellow: "ffffe0",
  lime: "0f0",
  limegreen: "32cd32",
  linen: "faf0e6",
  magenta: "f0f",
  maroon: "800000",
  mediumaquamarine: "66cdaa",
  mediumblue: "0000cd",
  mediumorchid: "ba55d3",
  mediumpurple: "9370db",
  mediumseagreen: "3cb371",
  mediumslateblue: "7b68ee",
  mediumspringgreen: "00fa9a",
  mediumturquoise: "48d1cc",
  mediumvioletred: "c71585",
  midnightblue: "191970",
  mintcream: "f5fffa",
  mistyrose: "ffe4e1",
  moccasin: "ffe4b5",
  navajowhite: "ffdead",
  navy: "000080",
  oldlace: "fdf5e6",
  olive: "808000",
  olivedrab: "6b8e23",
  orange: "ffa500",
  orangered: "ff4500",
  orchid: "da70d6",
  palegoldenrod: "eee8aa",
  palegreen: "98fb98",
  paleturquoise: "afeeee",
  palevioletred: "db7093",
  papayawhip: "ffefd5",
  peachpuff: "ffdab9",
  peru: "cd853f",
  pink: "ffc0cb",
  plum: "dda0dd",
  powderblue: "b0e0e6",
  purple: "800080",
  rebeccapurple: "663399",
  red: "f00",
  rosybrown: "bc8f8f",
  royalblue: "4169e1",
  saddlebrown: "8b4513",
  salmon: "fa8072",
  sandybrown: "f4a460",
  seagreen: "2e8b57",
  seashell: "fff5ee",
  sienna: "a0522d",
  silver: "c0c0c0",
  skyblue: "87ceeb",
  slateblue: "6a5acd",
  slategray: "708090",
  slategrey: "708090",
  snow: "fffafa",
  springgreen: "00ff7f",
  steelblue: "4682b4",
  tan: "d2b48c",
  teal: "008080",
  thistle: "d8bfd8",
  tomato: "ff6347",
  turquoise: "40e0d0",
  violet: "ee82ee",
  wheat: "f5deb3",
  white: "fff",
  whitesmoke: "f5f5f5",
  yellow: "ff0",
  yellowgreen: "9acd32"
};

// Make it easy to access colors via `hexNames[hex]`
var hexNames = tinycolor.hexNames = flip(names);

// Utilities
// ---------

// `{ 'name1': 'val1' }` becomes `{ 'val1': 'name1' }`
function flip(o) {
  var flipped = {};
  for (var i in o) {
    if (o.hasOwnProperty(i)) {
      flipped[o[i]] = i;
    }
  }
  return flipped;
}

// Return a valid alpha value [0,1] with all invalid values being set to 1
function boundAlpha(a) {
  a = parseFloat(a);
  if (isNaN(a) || a < 0 || a > 1) {
    a = 1;
  }
  return a;
}

// Take input from [0, n] and return it as [0, 1]
function bound01(n, max) {
  if (isOnePointZero(n)) n = "100%";
  var processPercent = isPercentage(n);
  n = Math.min(max, Math.max(0, parseFloat(n)));

  // Automatically convert percentage into number
  if (processPercent) {
    n = parseInt(n * max, 10) / 100;
  }

  // Handle floating point rounding errors
  if (Math.abs(n - max) < 0.000001) {
    return 1;
  }

  // Convert into [0, 1] range if it isn't already
  return n % max / parseFloat(max);
}

// Force a number between 0 and 1
function clamp01(val) {
  return Math.min(1, Math.max(0, val));
}

// Parse a base-16 hex value into a base-10 integer
function parseIntFromHex(val) {
  return parseInt(val, 16);
}

// Need to handle 1.0 as 100%, since once it is a number, there is no difference between it and 1
// <http://stackoverflow.com/questions/7422072/javascript-how-to-detect-number-as-a-decimal-including-1-0>
function isOnePointZero(n) {
  return typeof n == "string" && n.indexOf(".") != -1 && parseFloat(n) === 1;
}

// Check to see if string passed in is a percentage
function isPercentage(n) {
  return typeof n === "string" && n.indexOf("%") != -1;
}

// Force a hex value to have 2 characters
function pad2(c) {
  return c.length == 1 ? "0" + c : "" + c;
}

// Replace a decimal with it's percentage value
function convertToPercentage(n) {
  if (n <= 1) {
    n = n * 100 + "%";
  }
  return n;
}

// Converts a decimal to a hex value
function convertDecimalToHex(d) {
  return Math.round(parseFloat(d) * 255).toString(16);
}
// Converts a hex value to a decimal
function convertHexToDecimal(h) {
  return parseIntFromHex(h) / 255;
}
var matchers = function () {
  // <http://www.w3.org/TR/css3-values/#integers>
  var CSS_INTEGER = "[-\\+]?\\d+%?";

  // <http://www.w3.org/TR/css3-values/#number-value>
  var CSS_NUMBER = "[-\\+]?\\d*\\.\\d+%?";

  // Allow positive/negative integer/number.  Don't capture the either/or, just the entire outcome.
  var CSS_UNIT = "(?:" + CSS_NUMBER + ")|(?:" + CSS_INTEGER + ")";

  // Actual matching.
  // Parentheses and commas are optional, but not required.
  // Whitespace can take the place of commas or opening paren
  var PERMISSIVE_MATCH3 = "[\\s|\\(]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")\\s*\\)?";
  var PERMISSIVE_MATCH4 = "[\\s|\\(]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")\\s*\\)?";
  return {
    CSS_UNIT: new RegExp(CSS_UNIT),
    rgb: new RegExp("rgb" + PERMISSIVE_MATCH3),
    rgba: new RegExp("rgba" + PERMISSIVE_MATCH4),
    hsl: new RegExp("hsl" + PERMISSIVE_MATCH3),
    hsla: new RegExp("hsla" + PERMISSIVE_MATCH4),
    hsv: new RegExp("hsv" + PERMISSIVE_MATCH3),
    hsva: new RegExp("hsva" + PERMISSIVE_MATCH4),
    hex3: /^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/,
    hex6: /^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/,
    hex4: /^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/,
    hex8: /^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/
  };
}();

// `isValidCSSUnit`
// Take in a single string / number and check to see if it looks like a CSS unit
// (see `matchers` above for definition).
function isValidCSSUnit(color) {
  return !!matchers.CSS_UNIT.exec(color);
}

// `stringInputToObject`
// Permissive string parsing.  Take in a number of formats, and output an object
// based on detected format.  Returns `{ r, g, b }` or `{ h, s, l }` or `{ h, s, v}`
function stringInputToObject(color) {
  color = color.replace(trimLeft, "").replace(trimRight, "").toLowerCase();
  var named = false;
  if (names[color]) {
    color = names[color];
    named = true;
  } else if (color == "transparent") {
    return {
      r: 0,
      g: 0,
      b: 0,
      a: 0,
      format: "name"
    };
  }

  // Try to match string input using regular expressions.
  // Keep most of the number bounding out of this function - don't worry about [0,1] or [0,100] or [0,360]
  // Just return an object and let the conversion functions handle that.
  // This way the result will be the same whether the tinycolor is initialized with string or object.
  var match;
  if (match = matchers.rgb.exec(color)) {
    return {
      r: match[1],
      g: match[2],
      b: match[3]
    };
  }
  if (match = matchers.rgba.exec(color)) {
    return {
      r: match[1],
      g: match[2],
      b: match[3],
      a: match[4]
    };
  }
  if (match = matchers.hsl.exec(color)) {
    return {
      h: match[1],
      s: match[2],
      l: match[3]
    };
  }
  if (match = matchers.hsla.exec(color)) {
    return {
      h: match[1],
      s: match[2],
      l: match[3],
      a: match[4]
    };
  }
  if (match = matchers.hsv.exec(color)) {
    return {
      h: match[1],
      s: match[2],
      v: match[3]
    };
  }
  if (match = matchers.hsva.exec(color)) {
    return {
      h: match[1],
      s: match[2],
      v: match[3],
      a: match[4]
    };
  }
  if (match = matchers.hex8.exec(color)) {
    return {
      r: parseIntFromHex(match[1]),
      g: parseIntFromHex(match[2]),
      b: parseIntFromHex(match[3]),
      a: convertHexToDecimal(match[4]),
      format: named ? "name" : "hex8"
    };
  }
  if (match = matchers.hex6.exec(color)) {
    return {
      r: parseIntFromHex(match[1]),
      g: parseIntFromHex(match[2]),
      b: parseIntFromHex(match[3]),
      format: named ? "name" : "hex"
    };
  }
  if (match = matchers.hex4.exec(color)) {
    return {
      r: parseIntFromHex(match[1] + "" + match[1]),
      g: parseIntFromHex(match[2] + "" + match[2]),
      b: parseIntFromHex(match[3] + "" + match[3]),
      a: convertHexToDecimal(match[4] + "" + match[4]),
      format: named ? "name" : "hex8"
    };
  }
  if (match = matchers.hex3.exec(color)) {
    return {
      r: parseIntFromHex(match[1] + "" + match[1]),
      g: parseIntFromHex(match[2] + "" + match[2]),
      b: parseIntFromHex(match[3] + "" + match[3]),
      format: named ? "name" : "hex"
    };
  }
  return false;
}
function validateWCAG2Parms(parms) {
  // return valid WCAG2 parms for isReadable.
  // If input parms are invalid, return {"level":"AA", "size":"small"}
  var level, size;
  parms = parms || {
    level: "AA",
    size: "small"
  };
  level = (parms.level || "AA").toUpperCase();
  size = (parms.size || "small").toLowerCase();
  if (level !== "AA" && level !== "AAA") {
    level = "AA";
  }
  if (size !== "small" && size !== "large") {
    size = "small";
  }
  return {
    level: level,
    size: size
  };
}

export { tinycolor as default };