stylelint/dist/rules/declaration-block-no-duplicate-properties/index.js

A mighty, modern CSS linter.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.messages = exports.ruleName = undefined;

exports.default = function (on, options) {
  return function (root, result) {
    var validOptions = (0, _utils.validateOptions)(result, ruleName, { actual: on }, {
      actual: options,
      possible: {
        ignore: ["consecutive-duplicates", "consecutive-duplicates-with-different-values"],
        ignoreProperties: [_lodash.isString]
      },
      optional: true
    });
    if (!validOptions) {
      return;
    }

    // In order to accommodate nested blocks (postcss-nested),
    // we need to run a shallow loop (instead of eachDecl() or eachRule(),
    // which loop recursively) and allow each nested block to accumulate
    // its own list of properties -- so that a property in a nested rule
    // does not conflict with the same property in the parent rule
    root.each(function (node) {
      if (node.type === "rule" || node.type === "atrule") {
        checkRulesInNode(node);
      }
    });

    function checkRulesInNode(node) {
      var decls = [];
      var values = [];

      node.each(function (child) {
        if (child.nodes && child.nodes.length) {
          checkRulesInNode(child);
        }

        if (child.type !== "decl") {
          return;
        }

        var prop = child.prop;
        var value = child.value;


        if (!(0, _utils.isStandardSyntaxProperty)(prop)) {
          return;
        }
        if ((0, _utils.isCustomProperty)(prop)) {
          return;
        }

        // Return early if the property is to be ignored
        if ((0, _utils.optionsMatches)(options, "ignoreProperties", prop)) {
          return;
        }

        // Ignore the src property as commonly duplicated in at-fontface
        if (prop.toLowerCase() === "src") {
          return;
        }

        var indexDuplicate = decls.indexOf(prop.toLowerCase());

        if (indexDuplicate !== -1) {
          if ((0, _utils.optionsMatches)(options, "ignore", "consecutive-duplicates-with-different-values")) {
            // if duplicates are not consecutive
            if (indexDuplicate !== decls.length - 1) {
              (0, _utils.report)({
                message: messages.rejected(prop),
                node: child,
                result: result,
                ruleName: ruleName
              });
              return;
            }
            // if values of consecutive duplicates are equal
            if (value === values[indexDuplicate]) {
              (0, _utils.report)({
                message: messages.rejected(value),
                node: child,
                result: result,
                ruleName: ruleName
              });
              return;
            }
            return;
          }

          if ((0, _utils.optionsMatches)(options, "ignore", "consecutive-duplicates") && indexDuplicate === decls.length - 1) {
            return;
          }

          (0, _utils.report)({
            message: messages.rejected(prop),
            node: child,
            result: result,
            ruleName: ruleName
          });
        }

        decls.push(prop.toLowerCase());
        values.push(value.toLowerCase());
      });
    }
  };
};

var _utils = require("../../utils");

var _lodash = require("lodash");

var ruleName = exports.ruleName = "declaration-block-no-duplicate-properties";

var messages = exports.messages = (0, _utils.ruleMessages)(ruleName, {
  rejected: function rejected(property) {
    return "Unexpected duplicate \"" + property + "\"";
  }
});