1 | const ANSI_BACKGROUND_OFFSET = 10;
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2 |
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3 | const wrapAnsi16 = (offset = 0) => code => `\u001B[${code + offset}m`;
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4 |
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5 | const wrapAnsi256 = (offset = 0) => code => `\u001B[${38 + offset};5;${code}m`;
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6 |
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7 | const wrapAnsi16m = (offset = 0) => (red, green, blue) => `\u001B[${38 + offset};2;${red};${green};${blue}m`;
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8 |
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9 | const styles = {
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10 | modifier: {
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11 | reset: [0, 0],
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12 |
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13 | bold: [1, 22],
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14 | dim: [2, 22],
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15 | italic: [3, 23],
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16 | underline: [4, 24],
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17 | overline: [53, 55],
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18 | inverse: [7, 27],
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19 | hidden: [8, 28],
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20 | strikethrough: [9, 29],
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21 | },
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22 | color: {
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23 | black: [30, 39],
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24 | red: [31, 39],
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25 | green: [32, 39],
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26 | yellow: [33, 39],
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27 | blue: [34, 39],
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28 | magenta: [35, 39],
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29 | cyan: [36, 39],
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30 | white: [37, 39],
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31 |
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32 |
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33 | blackBright: [90, 39],
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34 | gray: [90, 39],
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35 | grey: [90, 39],
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36 | redBright: [91, 39],
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37 | greenBright: [92, 39],
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38 | yellowBright: [93, 39],
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39 | blueBright: [94, 39],
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40 | magentaBright: [95, 39],
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41 | cyanBright: [96, 39],
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42 | whiteBright: [97, 39],
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43 | },
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44 | bgColor: {
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45 | bgBlack: [40, 49],
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46 | bgRed: [41, 49],
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47 | bgGreen: [42, 49],
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48 | bgYellow: [43, 49],
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49 | bgBlue: [44, 49],
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50 | bgMagenta: [45, 49],
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51 | bgCyan: [46, 49],
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52 | bgWhite: [47, 49],
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53 |
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54 |
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55 | bgBlackBright: [100, 49],
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56 | bgGray: [100, 49],
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57 | bgGrey: [100, 49],
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58 | bgRedBright: [101, 49],
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59 | bgGreenBright: [102, 49],
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60 | bgYellowBright: [103, 49],
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61 | bgBlueBright: [104, 49],
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62 | bgMagentaBright: [105, 49],
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63 | bgCyanBright: [106, 49],
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64 | bgWhiteBright: [107, 49],
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65 | },
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66 | };
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67 |
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68 | export const modifierNames = Object.keys(styles.modifier);
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69 | export const foregroundColorNames = Object.keys(styles.color);
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70 | export const backgroundColorNames = Object.keys(styles.bgColor);
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71 | export const colorNames = [...foregroundColorNames, ...backgroundColorNames];
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72 |
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73 | function assembleStyles() {
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74 | const codes = new Map();
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75 |
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76 | for (const [groupName, group] of Object.entries(styles)) {
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77 | for (const [styleName, style] of Object.entries(group)) {
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78 | styles[styleName] = {
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79 | open: `\u001B[${style[0]}m`,
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80 | close: `\u001B[${style[1]}m`,
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81 | };
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82 |
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83 | group[styleName] = styles[styleName];
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84 |
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85 | codes.set(style[0], style[1]);
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86 | }
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87 |
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88 | Object.defineProperty(styles, groupName, {
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89 | value: group,
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90 | enumerable: false,
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91 | });
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92 | }
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93 |
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94 | Object.defineProperty(styles, 'codes', {
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95 | value: codes,
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96 | enumerable: false,
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97 | });
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98 |
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99 | styles.color.close = '\u001B[39m';
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100 | styles.bgColor.close = '\u001B[49m';
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101 |
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102 | styles.color.ansi = wrapAnsi16();
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103 | styles.color.ansi256 = wrapAnsi256();
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104 | styles.color.ansi16m = wrapAnsi16m();
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105 | styles.bgColor.ansi = wrapAnsi16(ANSI_BACKGROUND_OFFSET);
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106 | styles.bgColor.ansi256 = wrapAnsi256(ANSI_BACKGROUND_OFFSET);
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107 | styles.bgColor.ansi16m = wrapAnsi16m(ANSI_BACKGROUND_OFFSET);
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108 |
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109 |
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110 | Object.defineProperties(styles, {
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111 | rgbToAnsi256: {
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112 | value: (red, green, blue) => {
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113 |
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114 |
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115 | if (red === green && green === blue) {
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116 | if (red < 8) {
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117 | return 16;
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118 | }
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119 |
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120 | if (red > 248) {
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121 | return 231;
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122 | }
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123 |
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124 | return Math.round(((red - 8) / 247) * 24) + 232;
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125 | }
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126 |
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127 | return 16
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128 | + (36 * Math.round(red / 255 * 5))
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129 | + (6 * Math.round(green / 255 * 5))
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130 | + Math.round(blue / 255 * 5);
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131 | },
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132 | enumerable: false,
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133 | },
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134 | hexToRgb: {
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135 | value: hex => {
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136 | const matches = /[a-f\d]{6}|[a-f\d]{3}/i.exec(hex.toString(16));
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137 | if (!matches) {
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138 | return [0, 0, 0];
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139 | }
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140 |
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141 | let [colorString] = matches;
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142 |
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143 | if (colorString.length === 3) {
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144 | colorString = [...colorString].map(character => character + character).join('');
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145 | }
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146 |
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147 | const integer = Number.parseInt(colorString, 16);
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148 |
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149 | return [
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150 |
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151 | (integer >> 16) & 0xFF,
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152 | (integer >> 8) & 0xFF,
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153 | integer & 0xFF,
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154 |
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155 | ];
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156 | },
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157 | enumerable: false,
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158 | },
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159 | hexToAnsi256: {
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160 | value: hex => styles.rgbToAnsi256(...styles.hexToRgb(hex)),
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161 | enumerable: false,
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162 | },
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163 | ansi256ToAnsi: {
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164 | value: code => {
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165 | if (code < 8) {
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166 | return 30 + code;
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167 | }
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168 |
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169 | if (code < 16) {
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170 | return 90 + (code - 8);
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171 | }
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172 |
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173 | let red;
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174 | let green;
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175 | let blue;
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176 |
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177 | if (code >= 232) {
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178 | red = (((code - 232) * 10) + 8) / 255;
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179 | green = red;
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180 | blue = red;
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181 | } else {
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182 | code -= 16;
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183 |
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184 | const remainder = code % 36;
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185 |
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186 | red = Math.floor(code / 36) / 5;
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187 | green = Math.floor(remainder / 6) / 5;
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188 | blue = (remainder % 6) / 5;
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189 | }
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190 |
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191 | const value = Math.max(red, green, blue) * 2;
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192 |
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193 | if (value === 0) {
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194 | return 30;
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195 | }
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196 |
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197 |
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198 | let result = 30 + ((Math.round(blue) << 2) | (Math.round(green) << 1) | Math.round(red));
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199 |
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200 | if (value === 2) {
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201 | result += 60;
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202 | }
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203 |
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204 | return result;
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205 | },
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206 | enumerable: false,
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207 | },
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208 | rgbToAnsi: {
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209 | value: (red, green, blue) => styles.ansi256ToAnsi(styles.rgbToAnsi256(red, green, blue)),
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210 | enumerable: false,
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211 | },
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212 | hexToAnsi: {
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213 | value: hex => styles.ansi256ToAnsi(styles.hexToAnsi256(hex)),
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214 | enumerable: false,
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215 | },
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216 | });
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217 |
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218 | return styles;
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219 | }
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220 |
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221 | const ansiStyles = assembleStyles();
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222 |
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223 | export default ansiStyles;
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