/** * @fileoverview Rule to enforce placing object properties on separate lines. * @author Vitor Balocco */ "use strict"; //------------------------------------------------------------------------------ // Rule Definition //------------------------------------------------------------------------------ module.exports = { meta: { docs: { description: "enforce placing object properties on separate lines", category: "Stylistic Issues", recommended: false }, schema: [ { type: "object", properties: { allowMultiplePropertiesPerLine: { type: "boolean" } }, additionalProperties: false } ] }, create: function(context) { var allowSameLine = context.options[0] && Boolean(context.options[0].allowMultiplePropertiesPerLine); var errorMessage = allowSameLine ? "Object properties must go on a new line if they aren't all on the same line" : "Object properties must go on a new line"; var sourceCode = context.getSourceCode(); return { ObjectExpression: function(node) { var lastTokenOfPreviousProperty, firstTokenOfCurrentProperty; if (allowSameLine) { if (node.properties.length > 1) { var firstTokenOfFirstProperty = sourceCode.getFirstToken(node.properties[0]); var lastTokenOfLastProperty = sourceCode.getLastToken(node.properties[node.properties.length - 1]); if (firstTokenOfFirstProperty.loc.end.line === lastTokenOfLastProperty.loc.start.line) { // All keys and values are on the same line return; } } } for (var i = 1; i < node.properties.length; i++) { lastTokenOfPreviousProperty = sourceCode.getLastToken(node.properties[i - 1]); firstTokenOfCurrentProperty = sourceCode.getFirstToken(node.properties[i]); if (lastTokenOfPreviousProperty.loc.end.line === firstTokenOfCurrentProperty.loc.start.line) { context.report({ node: node, loc: firstTokenOfCurrentProperty.loc.start, message: errorMessage }); } } } }; } };