85 lines
3.2 KiB
JavaScript
85 lines
3.2 KiB
JavaScript
/**
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* @fileoverview Rule to enforce placing object properties on separate lines.
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* @author Vitor Balocco
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = {
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meta: {
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docs: {
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description: "enforce placing object properties on separate lines",
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category: "Stylistic Issues",
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recommended: false
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},
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schema: [
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{
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type: "object",
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properties: {
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allowMultiplePropertiesPerLine: {
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type: "boolean"
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}
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},
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additionalProperties: false
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}
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],
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fixable: "whitespace"
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},
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create(context) {
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const allowSameLine = context.options[0] && Boolean(context.options[0].allowMultiplePropertiesPerLine);
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const errorMessage = allowSameLine
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? "Object properties must go on a new line if they aren't all on the same line."
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: "Object properties must go on a new line.";
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const sourceCode = context.getSourceCode();
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return {
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ObjectExpression(node) {
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if (allowSameLine) {
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if (node.properties.length > 1) {
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const firstTokenOfFirstProperty = sourceCode.getFirstToken(node.properties[0]);
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const lastTokenOfLastProperty = sourceCode.getLastToken(node.properties[node.properties.length - 1]);
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if (firstTokenOfFirstProperty.loc.end.line === lastTokenOfLastProperty.loc.start.line) {
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// All keys and values are on the same line
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return;
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}
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}
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}
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for (let i = 1; i < node.properties.length; i++) {
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const lastTokenOfPreviousProperty = sourceCode.getLastToken(node.properties[i - 1]);
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const firstTokenOfCurrentProperty = sourceCode.getFirstToken(node.properties[i]);
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if (lastTokenOfPreviousProperty.loc.end.line === firstTokenOfCurrentProperty.loc.start.line) {
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context.report({
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node,
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loc: firstTokenOfCurrentProperty.loc.start,
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message: errorMessage,
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fix(fixer) {
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const comma = sourceCode.getTokenBefore(firstTokenOfCurrentProperty);
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const rangeAfterComma = [comma.range[1], firstTokenOfCurrentProperty.range[0]];
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// Don't perform a fix if there are any comments between the comma and the next property.
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if (sourceCode.text.slice(rangeAfterComma[0], rangeAfterComma[1]).trim()) {
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return null;
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}
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return fixer.replaceTextRange(rangeAfterComma, "\n");
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}
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});
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}
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}
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}
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};
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}
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};
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