--- /dev/null
+"use strict";
+
+const _ = require("lodash");
+const isStandardSyntaxRule = require("../../utils/isStandardSyntaxRule");
+const parseSelector = require("../../utils/parseSelector");
+const report = require("../../utils/report");
+const ruleMessages = require("../../utils/ruleMessages");
+const styleSearch = require("style-search");
+const validateOptions = require("../../utils/validateOptions");
+
+const ruleName = "selector-pseudo-class-parentheses-space-inside";
+
+const messages = ruleMessages(ruleName, {
+ expectedOpening: 'Expected single space after "("',
+ rejectedOpening: 'Unexpected whitespace after "("',
+ expectedClosing: 'Expected single space before ")"',
+ rejectedClosing: 'Unexpected whitespace before ")"'
+});
+
+const rule = function(expectation) {
+ return (root, result) => {
+ const validOptions = validateOptions(result, ruleName, {
+ actual: expectation,
+ possible: ["always", "never"]
+ });
+ if (!validOptions) {
+ return;
+ }
+
+ root.walkRules(rule => {
+ if (!isStandardSyntaxRule(rule)) {
+ return;
+ }
+ if (rule.selector.indexOf("(") === -1) {
+ return;
+ }
+
+ parseSelector(rule.selector, result, rule, selectorTree => {
+ selectorTree.walkPseudos(pseudoNode => {
+ if (_.get(pseudoNode, "parent.parent.type") === "pseudo") {
+ return;
+ }
+
+ const pseudoSelectorString = pseudoNode.toString();
+
+ styleSearch({ source: pseudoSelectorString, target: "(" }, match => {
+ const nextCharIsSpace =
+ pseudoSelectorString[match.startIndex + 1] === " ";
+ const index = pseudoNode.sourceIndex + match.startIndex + 1;
+ if (nextCharIsSpace && expectation === "never") {
+ complain(messages.rejectedOpening, index);
+ }
+ if (!nextCharIsSpace && expectation === "always") {
+ complain(messages.expectedOpening, index);
+ }
+ });
+
+ styleSearch({ source: pseudoSelectorString, target: ")" }, match => {
+ const prevCharIsSpace =
+ pseudoSelectorString[match.startIndex - 1] === " ";
+ const index = pseudoNode.sourceIndex + match.startIndex - 1;
+ if (prevCharIsSpace && expectation === "never") {
+ complain(messages.rejectedClosing, index);
+ }
+ if (!prevCharIsSpace && expectation === "always") {
+ complain(messages.expectedClosing, index);
+ }
+ });
+ });
+ });
+
+ function complain(message, index) {
+ report({
+ message,
+ index,
+ result,
+ ruleName,
+ node: rule
+ });
+ }
+ });
+ };
+};
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+module.exports = rule;