1 | import { TinyColor } from '@ctrl/tinycolor';
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2 | var hueStep = 2;
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3 |
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4 | var saturationStep = 0.16;
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5 |
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6 | var saturationStep2 = 0.05;
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7 |
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8 | var brightnessStep1 = 0.05;
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9 |
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10 | var brightnessStep2 = 0.15;
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11 |
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12 | var lightColorCount = 5;
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13 |
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14 | var darkColorCount = 4;
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15 |
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16 |
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17 | var darkColorMap = [{
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18 | index: 7,
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19 | opacity: 0.15
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20 | }, {
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21 | index: 6,
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22 | opacity: 0.25
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23 | }, {
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24 | index: 5,
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25 | opacity: 0.3
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26 | }, {
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27 | index: 5,
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28 | opacity: 0.45
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29 | }, {
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30 | index: 5,
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31 | opacity: 0.65
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32 | }, {
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33 | index: 5,
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34 | opacity: 0.85
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35 | }, {
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36 | index: 4,
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37 | opacity: 0.9
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38 | }, {
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39 | index: 3,
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40 | opacity: 0.95
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41 | }, {
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42 | index: 2,
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43 | opacity: 0.97
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44 | }, {
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45 | index: 1,
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46 | opacity: 0.98
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47 | }];
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48 |
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49 | function getHue(hsv, i, light) {
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50 | var hue;
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51 |
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52 | if (Math.round(hsv.h) >= 60 && Math.round(hsv.h) <= 240) {
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53 | hue = light ? Math.round(hsv.h) - hueStep * i : Math.round(hsv.h) + hueStep * i;
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54 | } else {
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55 | hue = light ? Math.round(hsv.h) + hueStep * i : Math.round(hsv.h) - hueStep * i;
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56 | }
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57 |
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58 | if (hue < 0) {
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59 | hue += 360;
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60 | } else if (hue >= 360) {
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61 | hue -= 360;
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62 | }
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63 |
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64 | return hue;
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65 | }
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66 |
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67 | function getSaturation(hsv, i, light) {
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68 |
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69 | if (hsv.h === 0 && hsv.s === 0) {
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70 | return hsv.s;
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71 | }
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72 |
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73 | var saturation;
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74 |
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75 | if (light) {
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76 | saturation = hsv.s - saturationStep * i;
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77 | } else if (i === darkColorCount) {
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78 | saturation = hsv.s + saturationStep;
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79 | } else {
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80 | saturation = hsv.s + saturationStep2 * i;
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81 | }
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82 |
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83 |
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84 | if (saturation > 1) {
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85 | saturation = 1;
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86 | }
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87 |
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88 |
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89 | if (light && i === lightColorCount && saturation > 0.1) {
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90 | saturation = 0.1;
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91 | }
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92 |
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93 | if (saturation < 0.06) {
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94 | saturation = 0.06;
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95 | }
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96 |
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97 | return Number(saturation.toFixed(2));
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98 | }
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99 |
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100 | function getValue(hsv, i, light) {
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101 | var value;
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102 |
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103 | if (light) {
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104 | value = hsv.v + brightnessStep1 * i;
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105 | } else {
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106 | value = hsv.v - brightnessStep2 * i;
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107 | }
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108 |
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109 | if (value > 1) {
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110 | value = 1;
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111 | }
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112 |
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113 | return Number(value.toFixed(2));
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114 | }
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115 |
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116 | export default function generate(color) {
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117 | var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
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118 | var patterns = [];
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119 | var pColor = new TinyColor(color);
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120 |
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121 | for (var i = lightColorCount; i > 0; i -= 1) {
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122 | var hsv = pColor.toHsv();
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123 | var colorString = new TinyColor({
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124 | h: getHue(hsv, i, true),
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125 | s: getSaturation(hsv, i, true),
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126 | v: getValue(hsv, i, true)
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127 | }).toHexString();
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128 | patterns.push(colorString);
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129 | }
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130 |
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131 | patterns.push(pColor.toHexString());
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132 |
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133 | for (var _i = 1; _i <= darkColorCount; _i += 1) {
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134 | var _hsv = pColor.toHsv();
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135 |
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136 | var _colorString = new TinyColor({
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137 | h: getHue(_hsv, _i),
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138 | s: getSaturation(_hsv, _i),
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139 | v: getValue(_hsv, _i)
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140 | }).toHexString();
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141 |
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142 | patterns.push(_colorString);
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143 | }
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144 |
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145 |
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146 | if (opts.theme === 'dark') {
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147 | return darkColorMap.map(function (_ref) {
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148 | var index = _ref.index,
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149 | opacity = _ref.opacity;
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150 | var darkColorString = new TinyColor(opts.backgroundColor || '#141414').mix(patterns[index], opacity * 100).toHexString();
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151 | return darkColorString;
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152 | });
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153 | }
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154 |
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155 | return patterns;
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156 | }
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157 |
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