--- /dev/null
+"use strict";
+
+const _ = require("lodash");
+const atRuleParamIndex = require("../../utils/atRuleParamIndex");
+const report = require("../../utils/report");
+const ruleMessages = require("../../utils/ruleMessages");
+const styleSearch = require("style-search");
+const validateOptions = require("../../utils/validateOptions");
+
+const ruleName = "media-feature-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.walkAtRules(/^media$/i, atRule => {
+ // If there are comments in the params, the complete string
+ // will be at atRule.raws.params.raw
+ const params = _.get(atRule, "raws.params.raw", atRule.params);
+ const indexBoost = atRuleParamIndex(atRule);
+
+ styleSearch({ source: params, target: "(" }, match => {
+ const nextCharIsSpace = params[match.startIndex + 1] === " ";
+ if (nextCharIsSpace && expectation === "never") {
+ report({
+ message: messages.rejectedOpening,
+ node: atRule,
+ index: match.startIndex + 1 + indexBoost,
+ result,
+ ruleName
+ });
+ }
+ if (!nextCharIsSpace && expectation === "always") {
+ report({
+ message: messages.expectedOpening,
+ node: atRule,
+ index: match.startIndex + 1 + indexBoost,
+ result,
+ ruleName
+ });
+ }
+ });
+
+ styleSearch({ source: params, target: ")" }, match => {
+ const prevCharIsSpace = params[match.startIndex - 1] === " ";
+ if (prevCharIsSpace && expectation === "never") {
+ report({
+ message: messages.rejectedClosing,
+ node: atRule,
+ index: match.startIndex - 1 + indexBoost,
+ result,
+ ruleName
+ });
+ }
+ if (!prevCharIsSpace && expectation === "always") {
+ report({
+ message: messages.expectedClosing,
+ node: atRule,
+ index: match.startIndex - 1 + indexBoost,
+ result,
+ ruleName
+ });
+ }
+ });
+ });
+ };
+};
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+module.exports = rule;