.config/coc/extensions/node_modules/coc-prettier/node_modules/stylelint/lib/rules/no-duplicate-selectors/index.js

   1 "use strict";
   2
   3 const _ = require("lodash");
   4 const findAtRuleContext = require("../../utils/findAtRuleContext");
   5 const isKeyframeRule = require("../../utils/isKeyframeRule");
   6 const nodeContextLookup = require("../../utils/nodeContextLookup");
   7 const normalizeSelector = require("normalize-selector");
   8 const report = require("../../utils/report");
   9 const resolvedNestedSelector = require("postcss-resolve-nested-selector");
  10 const ruleMessages = require("../../utils/ruleMessages");
  11 const validateOptions = require("../../utils/validateOptions");
  12
  13 const ruleName = "no-duplicate-selectors";
  14
  15 const messages = ruleMessages(ruleName, {
  16   rejected: (selector, firstDuplicateLine) =>
  17     `Unexpected duplicate selector "${selector}", first used at line ${
  18       firstDuplicateLine
  19     }`
  20 });
  21
  22 const rule = function(actual) {
  23   return (root, result) => {
  24     const validOptions = validateOptions(result, ruleName, { actual });
  25     if (!validOptions) {
  26       return;
  27     }
  28
  29     // The top level of this map will be rule sources.
  30     // Each source maps to another map, which maps rule parents to a set of selectors.
  31     // This ensures that selectors are only checked against selectors
  32     // from other rules that share the same parent and the same source.
  33     const selectorContextLookup = nodeContextLookup();
  34
  35     root.walkRules(rule => {
  36       if (isKeyframeRule(rule)) {
  37         return;
  38       }
  39
  40       const contextSelectorSet = selectorContextLookup.getContext(
  41         rule,
  42         findAtRuleContext(rule)
  43       );
  44       const resolvedSelectors = rule.selectors.reduce((result, selector) => {
  45         return _.union(result, resolvedNestedSelector(selector, rule));
  46       }, []);
  47       const normalizedSelectorList = resolvedSelectors.map(normalizeSelector);
  48       const selectorLine = rule.source.start.line;
  49
  50       // Complain if the same selector list occurs twice
  51
  52       // Sort the selectors list so that the order of the constituents
  53       // doesn't matter
  54       const sortedSelectorList = normalizedSelectorList
  55         .slice()
  56         .sort()
  57         .join(",");
  58       if (contextSelectorSet.has(sortedSelectorList)) {
  59         // If the selector isn't nested we can use its raw value; otherwise,
  60         // we have to approximate something for the message -- which is close enough
  61         const isNestedSelector =
  62           resolvedSelectors.join(",") !== rule.selectors.join(",");
  63         const selectorForMessage = isNestedSelector
  64           ? resolvedSelectors.join(", ")
  65           : rule.selector;
  66         const previousDuplicatePosition = contextSelectorSet.get(
  67           sortedSelectorList
  68         );
  69
  70         return report({
  71           result,
  72           ruleName,
  73           node: rule,
  74           message: messages.rejected(
  75             selectorForMessage,
  76             previousDuplicatePosition
  77           )
  78         });
  79       }
  80
  81       contextSelectorSet.set(sortedSelectorList, selectorLine);
  82
  83       // Or complain if one selector list contains the same selector more than one
  84       rule.selectors.forEach((selector, i) => {
  85         if (
  86           _.includes(
  87             normalizedSelectorList.slice(0, i),
  88             normalizeSelector(selector)
  89           )
  90         ) {
  91           report({
  92             result,
  93             ruleName,
  94             node: rule,
  95             message: messages.rejected(selector, selectorLine)
  96           });
  97         }
  98       });
  99     });
 100   };
 101 };
 102
 103 rule.ruleName = ruleName;
 104 rule.messages = messages;
 105 module.exports = rule;