1 | 'use strict';
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2 |
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3 | const atRuleParamIndex = require('../../utils/atRuleParamIndex');
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4 | const declarationValueIndex = require('../../utils/declarationValueIndex');
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5 | const getUnitFromValueNode = require('../../utils/getUnitFromValueNode');
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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 validateOptions = require('../../utils/validateOptions');
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10 |
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11 | const _ = require('lodash');
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12 | const valueParser = require('postcss-value-parser');
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13 |
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14 | const ruleName = 'number-max-precision';
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15 |
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16 | const messages = ruleMessages(ruleName, {
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17 | expected: (number, precision) => `Expected "${number}" to be "${number.toFixed(precision)}"`,
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18 | });
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19 |
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20 | function rule(precision, options) {
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21 | return (root, result) => {
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22 | const validOptions = validateOptions(
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23 | result,
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24 | ruleName,
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25 | {
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26 | actual: precision,
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27 | possible: [_.isNumber],
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28 | },
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29 | {
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30 | optional: true,
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31 | actual: options,
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32 | possible: {
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33 | ignoreUnits: [_.isString, _.isRegExp],
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34 | },
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35 | },
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36 | );
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37 |
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38 | if (!validOptions) {
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39 | return;
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40 | }
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41 |
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42 | root.walkAtRules((atRule) => {
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43 | if (atRule.name.toLowerCase() === 'import') {
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44 | return;
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45 | }
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46 |
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47 | check(atRule, atRule.params, atRuleParamIndex);
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48 | });
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49 |
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50 | root.walkDecls((decl) => check(decl, decl.value, declarationValueIndex));
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51 |
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52 | function check(node, value, getIndex) {
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53 |
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54 | if (!value.includes('.')) {
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55 | return;
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56 | }
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57 |
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58 | valueParser(value).walk((valueNode) => {
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59 | const unit = getUnitFromValueNode(valueNode);
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60 |
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61 | if (optionsMatches(options, 'ignoreUnits', unit)) {
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62 | return;
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63 | }
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64 |
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65 |
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66 | if (valueNode.type === 'function' && valueNode.value.toLowerCase() === 'url') {
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67 | return false;
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68 | }
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69 |
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70 |
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71 | if (valueNode.type !== 'word') {
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72 | return;
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73 | }
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74 |
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75 | const match = /\d*\.(\d+)/.exec(valueNode.value);
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76 |
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77 | if (match === null) {
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78 | return;
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79 | }
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80 |
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81 | if (match[1].length <= precision) {
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82 | return;
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83 | }
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84 |
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85 | report({
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86 | result,
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87 | ruleName,
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88 | node,
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89 | index: getIndex(node) + valueNode.sourceIndex + match.index,
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90 | message: messages.expected(parseFloat(match[0]), precision),
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91 | });
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92 | });
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93 | }
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94 | };
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95 | }
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96 |
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97 | rule.ruleName = ruleName;
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98 | rule.messages = messages;
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99 | module.exports = rule;
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