1 |
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2 |
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3 | 'use strict';
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4 |
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5 | const isOnlyWhitespace = require('../../utils/isOnlyWhitespace');
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6 | const optionsMatches = require('../../utils/optionsMatches');
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7 | const report = require('../../utils/report');
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8 | const ruleMessages = require('../../utils/ruleMessages');
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9 | const styleSearch = require('style-search');
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10 | const validateOptions = require('../../utils/validateOptions');
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11 |
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12 | const ruleName = 'no-eol-whitespace';
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13 |
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14 | const messages = ruleMessages(ruleName, {
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15 | rejected: 'Unexpected whitespace at end of line',
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16 | });
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17 |
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18 | const whitespacesToReject = new Set([' ', '\t']);
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19 |
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20 | function fixString(str) {
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21 | return str.replace(/[ \t]+$/, '');
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22 | }
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23 |
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24 | function findErrorStartIndex(
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25 | lastEOLIndex,
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26 | string,
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27 | { ignoreEmptyLines, isRootFirst } = {
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28 | ignoreEmptyLines: false,
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29 | isRootFirst: false,
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30 | },
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31 | ) {
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32 | const eolWhitespaceIndex = lastEOLIndex - 1;
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33 |
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34 |
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35 | if (!whitespacesToReject.has(string[eolWhitespaceIndex])) {
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36 | return -1;
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37 | }
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38 |
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39 | if (ignoreEmptyLines) {
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40 |
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41 |
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42 | const beforeNewlineIndex = string.lastIndexOf('\n', eolWhitespaceIndex);
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43 |
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44 | if (beforeNewlineIndex >= 0 || isRootFirst) {
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45 | const line = string.substring(beforeNewlineIndex, eolWhitespaceIndex);
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46 |
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47 | if (isOnlyWhitespace(line)) {
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48 | return -1;
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49 | }
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50 | }
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51 | }
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52 |
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53 | return eolWhitespaceIndex;
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54 | }
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55 |
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56 | function rule(on, options, context) {
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57 | return (root, result) => {
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58 | const validOptions = validateOptions(
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59 | result,
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60 | ruleName,
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61 | {
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62 | actual: on,
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63 | },
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64 | {
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65 | optional: true,
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66 | actual: options,
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67 | possible: {
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68 | ignore: ['empty-lines'],
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69 | },
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70 | },
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71 | );
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72 |
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73 | if (!validOptions) {
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74 | return;
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75 | }
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76 |
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77 | const ignoreEmptyLines = optionsMatches(options, 'ignore', 'empty-lines');
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78 |
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79 | if (context.fix) {
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80 | fix(root);
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81 | }
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82 |
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83 | const rootString = context.fix ? root.toString() : root.source.input.css;
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84 | const reportFromIndex = (index) => {
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85 | report({
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86 | message: messages.rejected,
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87 | node: root,
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88 | index,
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89 | result,
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90 | ruleName,
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91 | });
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92 | };
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93 |
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94 | eachEolWhitespace(rootString, reportFromIndex, true);
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95 |
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96 | const errorIndex = findErrorStartIndex(rootString.length, rootString, {
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97 | ignoreEmptyLines,
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98 | isRootFirst: true,
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99 | });
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100 |
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101 | if (errorIndex > -1) {
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102 | reportFromIndex(errorIndex);
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103 | }
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104 |
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105 | |
106 |
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107 |
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108 |
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109 |
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110 |
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111 |
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112 | function eachEolWhitespace(string, callback, isRootFirst) {
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113 | styleSearch(
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114 | {
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115 | source: string,
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116 | target: ['\n', '\r'],
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117 | comments: 'check',
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118 | },
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119 | (match) => {
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120 | const errorIndex = findErrorStartIndex(match.startIndex, string, {
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121 | ignoreEmptyLines,
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122 | isRootFirst,
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123 | });
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124 |
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125 | if (errorIndex > -1) {
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126 | callback(errorIndex);
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127 | }
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128 | },
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129 | );
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130 | }
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131 |
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132 | function fix(root) {
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133 | let isRootFirst = true;
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134 |
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135 | root.walk((node) => {
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136 | fixText(
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137 | node.raws.before,
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138 | (fixed) => {
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139 | node.raws.before = fixed;
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140 | },
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141 | isRootFirst,
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142 | );
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143 | isRootFirst = false;
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144 |
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145 |
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146 | fixText(node.raws.afterName, (fixed) => {
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147 | node.raws.afterName = fixed;
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148 | });
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149 |
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150 | if (node.raws.params) {
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151 | fixText(node.raws.params.raw, (fixed) => {
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152 | node.raws.params.raw = fixed;
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153 | });
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154 | } else {
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155 | fixText(node.params, (fixed) => {
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156 | node.params = fixed;
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157 | });
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158 | }
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159 |
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160 |
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161 | if (node.raws.selector) {
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162 | fixText(node.raws.selector.raw, (fixed) => {
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163 | node.raws.selector.raw = fixed;
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164 | });
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165 | } else {
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166 | fixText(node.selector, (fixed) => {
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167 | node.selector = fixed;
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168 | });
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169 | }
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170 |
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171 |
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172 | fixText(node.raws.between, (fixed) => {
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173 | node.raws.between = fixed;
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174 | });
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175 |
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176 |
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177 | if (node.raws.value) {
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178 | fixText(node.raws.value.raw, (fixed) => {
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179 | node.raws.value.raw = fixed;
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180 | });
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181 | } else {
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182 | fixText(node.value, (fixed) => {
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183 | node.value = fixed;
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184 | });
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185 | }
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186 |
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187 |
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188 | fixText(node.raws.left, (fixed) => {
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189 | node.raws.left = fixed;
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190 | });
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191 |
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192 | if (node.raws.inline) {
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193 | node.raws.right = fixString(node.raws.right);
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194 | } else {
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195 | fixText(node.raws.right, (fixed) => {
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196 | node.raws.right = fixed;
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197 | });
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198 | }
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199 |
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200 | fixText(node.text, (fixed) => {
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201 | node.text = fixed;
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202 | });
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203 |
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204 | fixText(node.raws.after, (fixed) => {
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205 | node.raws.after = fixed;
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206 | });
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207 | });
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208 |
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209 | fixText(
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210 | root.raws.after,
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211 | (fixed) => {
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212 | root.raws.after = fixed;
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213 | },
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214 | isRootFirst,
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215 | );
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216 |
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217 | if (typeof root.raws.after === 'string') {
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218 | const lastEOL = Math.max(
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219 | root.raws.after.lastIndexOf('\n'),
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220 | root.raws.after.lastIndexOf('\r'),
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221 | );
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222 |
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223 | if (lastEOL !== root.raws.after.length - 1) {
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224 | root.raws.after =
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225 | root.raws.after.slice(0, lastEOL + 1) + fixString(root.raws.after.slice(lastEOL + 1));
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226 | }
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227 | }
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228 | }
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229 |
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230 | function fixText(value, fix, isRootFirst) {
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231 | if (!value) {
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232 | return;
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233 | }
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234 |
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235 | let fixed = '';
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236 | let lastIndex = 0;
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237 |
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238 | eachEolWhitespace(
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239 | value,
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240 | (index) => {
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241 | const newlineIndex = index + 1;
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242 |
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243 | fixed += fixString(value.slice(lastIndex, newlineIndex));
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244 | lastIndex = newlineIndex;
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245 | },
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246 | isRootFirst,
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247 | );
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248 |
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249 | if (lastIndex) {
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250 | fixed += value.slice(lastIndex);
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251 | fix(fixed);
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252 | }
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253 | }
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254 | };
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255 | }
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256 |
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257 | rule.ruleName = ruleName;
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258 | rule.messages = messages;
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259 | module.exports = rule;
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