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