1 | 'use strict';
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2 |
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3 | const _ = require('lodash');
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4 | const addEmptyLineBefore = require('../../utils/addEmptyLineBefore');
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5 | const getPreviousNonSharedLineCommentNode = require('../../utils/getPreviousNonSharedLineCommentNode');
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6 | const hasEmptyLine = require('../../utils/hasEmptyLine');
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7 | const isAfterComment = require('../../utils/isAfterComment');
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8 | const isBlocklessAtRuleAfterBlocklessAtRule = require('../../utils/isBlocklessAtRuleAfterBlocklessAtRule');
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9 | const isBlocklessAtRuleAfterSameNameBlocklessAtRule = require('../../utils/isBlocklessAtRuleAfterSameNameBlocklessAtRule');
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10 | const isFirstNested = require('../../utils/isFirstNested');
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11 | const isFirstNodeOfRoot = require('../../utils/isFirstNodeOfRoot');
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12 | const isStandardSyntaxAtRule = require('../../utils/isStandardSyntaxAtRule');
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13 | const optionsMatches = require('../../utils/optionsMatches');
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14 | const removeEmptyLinesBefore = require('../../utils/removeEmptyLinesBefore');
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15 | const report = require('../../utils/report');
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16 | const ruleMessages = require('../../utils/ruleMessages');
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17 | const validateOptions = require('../../utils/validateOptions');
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18 |
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19 | const ruleName = 'at-rule-empty-line-before';
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20 |
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21 | const messages = ruleMessages(ruleName, {
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22 | expected: 'Expected empty line before at-rule',
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23 | rejected: 'Unexpected empty line before at-rule',
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24 | });
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25 |
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26 | function rule(expectation, options, context) {
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27 | return (root, result) => {
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28 | const validOptions = validateOptions(
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29 | result,
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30 | ruleName,
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31 | {
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32 | actual: expectation,
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33 | possible: ['always', 'never'],
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34 | },
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35 | {
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36 | actual: options,
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37 | possible: {
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38 | except: [
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39 | 'after-same-name',
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40 | 'inside-block',
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41 | 'blockless-after-same-name-blockless',
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42 | 'blockless-after-blockless',
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43 | 'first-nested',
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44 | ],
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45 | ignore: [
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46 | 'after-comment',
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47 | 'first-nested',
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48 | 'inside-block',
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49 | 'blockless-after-same-name-blockless',
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50 | 'blockless-after-blockless',
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51 | ],
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52 | ignoreAtRules: [_.isString],
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53 | },
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54 | optional: true,
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55 | },
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56 | );
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57 |
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58 | if (!validOptions) {
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59 | return;
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60 | }
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61 |
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62 | root.walkAtRules((atRule) => {
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63 | const isNested = atRule.parent.type !== 'root';
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64 |
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65 |
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66 | if (isFirstNodeOfRoot(atRule)) {
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67 | return;
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68 | }
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69 |
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70 | if (!isStandardSyntaxAtRule(atRule)) {
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71 | return;
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72 | }
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73 |
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74 |
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75 | if (optionsMatches(options, 'ignoreAtRules', atRule.name)) {
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76 | return;
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77 | }
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78 |
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79 |
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80 | if (
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81 | optionsMatches(options, 'ignore', 'blockless-after-blockless') &&
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82 | isBlocklessAtRuleAfterBlocklessAtRule(atRule)
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83 | ) {
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84 | return;
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85 | }
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86 |
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87 |
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88 | if (optionsMatches(options, 'ignore', 'first-nested') && isFirstNested(atRule)) {
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89 | return;
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90 | }
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91 |
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92 |
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93 |
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94 | if (
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95 | optionsMatches(options, 'ignore', 'blockless-after-same-name-blockless') &&
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96 | isBlocklessAtRuleAfterSameNameBlocklessAtRule(atRule)
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97 | ) {
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98 | return;
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99 | }
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100 |
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101 |
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102 | if (optionsMatches(options, 'ignore', 'inside-block') && isNested) {
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103 | return;
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104 | }
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105 |
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106 |
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107 | if (optionsMatches(options, 'ignore', 'after-comment') && isAfterComment(atRule)) {
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108 | return;
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109 | }
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110 |
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111 | const hasEmptyLineBefore = hasEmptyLine(atRule.raws.before);
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112 | let expectEmptyLineBefore = expectation === 'always';
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113 |
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114 |
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115 | if (
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116 | (optionsMatches(options, 'except', 'after-same-name') &&
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117 | isAtRuleAfterSameNameAtRule(atRule)) ||
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118 | (optionsMatches(options, 'except', 'inside-block') && isNested) ||
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119 | (optionsMatches(options, 'except', 'first-nested') && isFirstNested(atRule)) ||
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120 | (optionsMatches(options, 'except', 'blockless-after-blockless') &&
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121 | isBlocklessAtRuleAfterBlocklessAtRule(atRule)) ||
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122 | (optionsMatches(options, 'except', 'blockless-after-same-name-blockless') &&
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123 | isBlocklessAtRuleAfterSameNameBlocklessAtRule(atRule))
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124 | ) {
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125 | expectEmptyLineBefore = !expectEmptyLineBefore;
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126 | }
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127 |
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128 |
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129 | if (expectEmptyLineBefore === hasEmptyLineBefore) {
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130 | return;
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131 | }
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132 |
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133 |
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134 | if (context.fix) {
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135 | if (expectEmptyLineBefore) {
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136 | addEmptyLineBefore(atRule, context.newline);
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137 | } else {
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138 | removeEmptyLinesBefore(atRule, context.newline);
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139 | }
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140 |
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141 | return;
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142 | }
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143 |
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144 | const message = expectEmptyLineBefore ? messages.expected : messages.rejected;
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145 |
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146 | report({ message, node: atRule, result, ruleName });
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147 | });
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148 | };
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149 | }
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150 |
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151 | function isAtRuleAfterSameNameAtRule(atRule) {
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152 | const previousNode = getPreviousNonSharedLineCommentNode(atRule);
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153 |
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154 | return previousNode && previousNode.type === 'atrule' && previousNode.name === atRule.name;
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155 | }
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156 |
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157 | rule.ruleName = ruleName;
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158 | rule.messages = messages;
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159 | module.exports = rule;
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