| "use strict"; |
| |
| const _ = require("lodash"); |
| const isKeyframeSelector = require("../../utils/isKeyframeSelector"); |
| const isStandardSyntaxRule = require("../../utils/isStandardSyntaxRule"); |
| const isStandardSyntaxSelector = require("../../utils/isStandardSyntaxSelector"); |
| const parseSelector = require("../../utils/parseSelector"); |
| const report = require("../../utils/report"); |
| const resolveNestedSelector = require("postcss-resolve-nested-selector"); |
| const ruleMessages = require("../../utils/ruleMessages"); |
| const validateOptions = require("../../utils/validateOptions"); |
| |
| const ruleName = "selector-class-pattern"; |
| |
| const messages = ruleMessages(ruleName, { |
| expected: selectorValue => |
| `Expected class selector ".${selectorValue}" to match specified pattern` |
| }); |
| |
| const rule = function(pattern, options) { |
| return (root, result) => { |
| const validOptions = validateOptions( |
| result, |
| ruleName, |
| { |
| actual: pattern, |
| possible: [_.isRegExp, _.isString] |
| }, |
| { |
| actual: options, |
| possible: { |
| resolveNestedSelectors: _.isBoolean |
| }, |
| optional: true |
| } |
| ); |
| |
| if (!validOptions) { |
| return; |
| } |
| |
| const shouldResolveNestedSelectors = _.get( |
| options, |
| "resolveNestedSelectors" |
| ); |
| const normalizedPattern = _.isString(pattern) |
| ? new RegExp(pattern) |
| : pattern; |
| |
| root.walkRules(rule => { |
| const selector = rule.selector; |
| const selectors = rule.selectors; |
| |
| if (!isStandardSyntaxRule(rule)) { |
| return; |
| } |
| |
| if (!isStandardSyntaxSelector(selector)) { |
| return; |
| } |
| |
| if (selectors.some(s => isKeyframeSelector(s))) { |
| return; |
| } |
| |
| // Only bother resolving selectors that have an interpolating & |
| if (shouldResolveNestedSelectors && hasInterpolatingAmpersand(selector)) { |
| resolveNestedSelector(selector, rule).forEach(selector => { |
| if (!isStandardSyntaxSelector(selector)) { |
| return; |
| } |
| |
| parseSelector(selector, result, rule, s => checkSelector(s, rule)); |
| }); |
| } else { |
| parseSelector(selector, result, rule, s => checkSelector(s, rule)); |
| } |
| }); |
| |
| function checkSelector(fullSelector, rule) { |
| fullSelector.walkClasses(classNode => { |
| const value = classNode.value; |
| const sourceIndex = classNode.sourceIndex; |
| |
| if (normalizedPattern.test(value)) { |
| return; |
| } |
| |
| report({ |
| result, |
| ruleName, |
| message: messages.expected(value), |
| node: rule, |
| index: sourceIndex |
| }); |
| }); |
| } |
| }; |
| }; |
| |
| // An "interpolating ampersand" means an "&" used to interpolate |
| // within another simple selector, rather than an "&" that |
| // stands on its own as a simple selector |
| function hasInterpolatingAmpersand(selector) { |
| for (let i = 0, l = selector.length; i < l; i++) { |
| if (selector[i] !== "&") { |
| continue; |
| } |
| |
| if (!_.isUndefined(selector[i - 1]) && !isCombinator(selector[i - 1])) { |
| return true; |
| } |
| |
| if (!_.isUndefined(selector[i + 1]) && !isCombinator(selector[i + 1])) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| function isCombinator(x) { |
| return /[\s+>~]/.test(x); |
| } |
| |
| rule.ruleName = ruleName; |
| rule.messages = messages; |
| module.exports = rule; |