Initial commit

node_modules/stylelint/lib/rules/selector-max-specificity/index.js

@@ -0,0 +1,74 @@
+"use strict"
+
+const specificity = require("specificity")
+const isStandardSyntaxRule = require("../../utils/isStandardSyntaxRule")
+const isStandardSyntaxSelector = require("../../utils/isStandardSyntaxSelector")
+const report = require("../../utils/report")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+const resolvedNestedSelector = require("postcss-resolve-nested-selector")
+
+const ruleName = "selector-max-specificity"
+
+const messages = ruleMessages(ruleName, {
+  expected: (selector, specificity) => `Expected "${selector}" to have a specificity no more than "${specificity}"`,
+})
+
+const rule = function (max) {
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, {
+      actual: max,
+      possible: [
+        function (max) {
+        // Check that the max specificity is in the form "a,b,c"
+          const pattern = new RegExp("^\\d+,\\d+,\\d+$")
+          return pattern.test(max)
+        },
+      ],
+    })
+    if (!validOptions) {
+      return
+    }
+
+    const maxSpecificityArray = ("0," + max).split(",").map(parseFloat)
+    root.walkRules(rule => {
+      if (!isStandardSyntaxRule(rule)) {
+        return
+      }
+      if (!isStandardSyntaxSelector(rule.selector)) {
+        return
+      }
+      // Using rule.selectors gets us each selector in the eventuality we have a comma separated set
+      rule.selectors.forEach(selector => {
+        resolvedNestedSelector(selector, rule).forEach(resolvedSelector => {
+          // Return early if selector contains a not pseudo-class
+          if (selector.indexOf(":not(") !== -1) {
+            return
+          }
+          // Return early if selector contains a matches
+          if (selector.indexOf(":matches(") !== -1) {
+            return
+          }
+          // Check if the selector specificity exceeds the allowed maximum
+          try {
+            if (specificity.compare(resolvedSelector, maxSpecificityArray) === 1) {
+              report({
+                ruleName,
+                result,
+                node: rule,
+                message: messages.expected(resolvedSelector, max),
+                word: selector,
+              })
+            }
+          } catch (e) {
+            result.warn("Cannot parse selector", { node: rule })
+          }
+        })
+      })
+    })
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule