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/**
* @fileoverview Rule to disallow whitespace before properties
* @author Kai Cataldo
*/
"use strict";
var astUtils = require("../ast-utils");
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: "disallow whitespace before properties",
category: "Stylistic Issues",
recommended: false
},
fixable: "whitespace",
schema: []
},
create: function(context) {
var sourceCode = context.getSourceCode();
//--------------------------------------------------------------------------
// Helpers
//--------------------------------------------------------------------------
/**
* Finds opening bracket token of node's computed property
* @param {ASTNode} node - the node to check
* @returns {Token} opening bracket token of node's computed property
* @private
*/
function findOpeningBracket(node) {
var token = sourceCode.getTokenBefore(node.property);
while (token.value !== "[") {
token = sourceCode.getTokenBefore(token);
}
return token;
}
/**
* Reports whitespace before property token
* @param {ASTNode} node - the node to report in the event of an error
* @param {Token} leftToken - the left token
* @param {Token} rightToken - the right token
* @returns {void}
* @private
*/
function reportError(node, leftToken, rightToken) {
var replacementText = node.computed ? "" : ".";
context.report({
node: node,
message: "Unexpected whitespace before property {{propName}}.",
data: {
propName: sourceCode.getText(node.property)
},
fix: function(fixer) {
return fixer.replaceTextRange([leftToken.range[1], rightToken.range[0]], replacementText);
}
});
}
//--------------------------------------------------------------------------
// Public
//--------------------------------------------------------------------------
return {
MemberExpression: function(node) {
var rightToken;
var leftToken;
if (!astUtils.isTokenOnSameLine(node.object, node.property)) {
return;
}
if (node.computed) {
rightToken = findOpeningBracket(node);
leftToken = sourceCode.getTokenBefore(rightToken);
} else {
rightToken = sourceCode.getFirstToken(node.property);
leftToken = sourceCode.getTokenBefore(rightToken, 1);
}
if (sourceCode.isSpaceBetweenTokens(leftToken, rightToken)) {
reportError(node, leftToken, rightToken);
}
}
};
}
};
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