--- /dev/null
+"use strict";
+
+const _ = require("lodash");
+const optionsMatches = require("../../utils/optionsMatches");
+const postcss = require("postcss");
+const report = require("../../utils/report");
+const ruleMessages = require("../../utils/ruleMessages");
+const shorthandData = require("../../reference/shorthandData");
+const validateOptions = require("../../utils/validateOptions");
+
+const ruleName = "declaration-block-no-redundant-longhand-properties";
+
+const messages = ruleMessages(ruleName, {
+ expected: props => `Expected shorthand property "${props}"`
+});
+
+const rule = function(actual, options) {
+ return (root, result) => {
+ const validOptions = validateOptions(
+ result,
+ ruleName,
+ { actual },
+ {
+ actual: options,
+ possible: {
+ ignoreShorthands: [_.isString]
+ },
+ optional: true
+ }
+ );
+ if (!validOptions) {
+ return;
+ }
+
+ const longhandProperties = _.transform(
+ shorthandData,
+ (result, values, key) => {
+ if (optionsMatches(options, "ignoreShorthands", key)) {
+ return;
+ }
+
+ values.forEach(value => {
+ (result[value] || (result[value] = [])).push(key);
+ });
+ }
+ );
+
+ root.walkRules(check);
+ root.walkAtRules(check);
+
+ function check(statement) {
+ const longhandDeclarations = {};
+ // Shallow iteration so nesting doesn't produce
+ // false positives
+ statement.each(node => {
+ if (node.type !== "decl") {
+ return;
+ }
+
+ const prop = node.prop.toLowerCase();
+ const unprefixedProp = postcss.vendor.unprefixed(prop);
+ const prefix = postcss.vendor.prefix(prop);
+
+ const shorthandProperties = longhandProperties[unprefixedProp];
+
+ if (!shorthandProperties) {
+ return;
+ }
+
+ shorthandProperties.forEach(shorthandProperty => {
+ const prefixedShorthandProperty = prefix + shorthandProperty;
+
+ if (!longhandDeclarations[prefixedShorthandProperty]) {
+ longhandDeclarations[prefixedShorthandProperty] = [];
+ }
+
+ longhandDeclarations[prefixedShorthandProperty].push(prop);
+
+ const prefixedShorthandData = shorthandData[shorthandProperty].map(
+ item => {
+ return prefix + item;
+ }
+ );
+
+ if (
+ !_.isEqual(
+ prefixedShorthandData.sort(),
+ longhandDeclarations[prefixedShorthandProperty].sort()
+ )
+ ) {
+ return;
+ }
+
+ report({
+ ruleName,
+ result,
+ node,
+ message: messages.expected(prefixedShorthandProperty)
+ });
+ });
+ });
+ }
+ };
+};
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+module.exports = rule;