128 lines
4.6 KiB
JavaScript
128 lines
4.6 KiB
JavaScript
/**
|
|
* @fileoverview enforce the location of single-line statements
|
|
* @author Teddy Katz
|
|
* @deprecated in ESLint v8.53.0
|
|
*/
|
|
"use strict";
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
const POSITION_SCHEMA = { enum: ["beside", "below", "any"] };
|
|
|
|
/** @type {import('../shared/types').Rule} */
|
|
module.exports = {
|
|
meta: {
|
|
deprecated: true,
|
|
replacedBy: [],
|
|
type: "layout",
|
|
|
|
docs: {
|
|
description: "Enforce the location of single-line statements",
|
|
recommended: false,
|
|
url: "https://eslint.org/docs/latest/rules/nonblock-statement-body-position"
|
|
},
|
|
|
|
fixable: "whitespace",
|
|
|
|
schema: [
|
|
POSITION_SCHEMA,
|
|
{
|
|
properties: {
|
|
overrides: {
|
|
properties: {
|
|
if: POSITION_SCHEMA,
|
|
else: POSITION_SCHEMA,
|
|
while: POSITION_SCHEMA,
|
|
do: POSITION_SCHEMA,
|
|
for: POSITION_SCHEMA
|
|
},
|
|
additionalProperties: false
|
|
}
|
|
},
|
|
additionalProperties: false
|
|
}
|
|
],
|
|
|
|
messages: {
|
|
expectNoLinebreak: "Expected no linebreak before this statement.",
|
|
expectLinebreak: "Expected a linebreak before this statement."
|
|
}
|
|
},
|
|
|
|
create(context) {
|
|
const sourceCode = context.sourceCode;
|
|
|
|
//----------------------------------------------------------------------
|
|
// Helpers
|
|
//----------------------------------------------------------------------
|
|
|
|
/**
|
|
* Gets the applicable preference for a particular keyword
|
|
* @param {string} keywordName The name of a keyword, e.g. 'if'
|
|
* @returns {string} The applicable option for the keyword, e.g. 'beside'
|
|
*/
|
|
function getOption(keywordName) {
|
|
return context.options[1] && context.options[1].overrides && context.options[1].overrides[keywordName] ||
|
|
context.options[0] ||
|
|
"beside";
|
|
}
|
|
|
|
/**
|
|
* Validates the location of a single-line statement
|
|
* @param {ASTNode} node The single-line statement
|
|
* @param {string} keywordName The applicable keyword name for the single-line statement
|
|
* @returns {void}
|
|
*/
|
|
function validateStatement(node, keywordName) {
|
|
const option = getOption(keywordName);
|
|
|
|
if (node.type === "BlockStatement" || option === "any") {
|
|
return;
|
|
}
|
|
|
|
const tokenBefore = sourceCode.getTokenBefore(node);
|
|
|
|
if (tokenBefore.loc.end.line === node.loc.start.line && option === "below") {
|
|
context.report({
|
|
node,
|
|
messageId: "expectLinebreak",
|
|
fix: fixer => fixer.insertTextBefore(node, "\n")
|
|
});
|
|
} else if (tokenBefore.loc.end.line !== node.loc.start.line && option === "beside") {
|
|
context.report({
|
|
node,
|
|
messageId: "expectNoLinebreak",
|
|
fix(fixer) {
|
|
if (sourceCode.getText().slice(tokenBefore.range[1], node.range[0]).trim()) {
|
|
return null;
|
|
}
|
|
return fixer.replaceTextRange([tokenBefore.range[1], node.range[0]], " ");
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Public
|
|
//----------------------------------------------------------------------
|
|
|
|
return {
|
|
IfStatement(node) {
|
|
validateStatement(node.consequent, "if");
|
|
|
|
// Check the `else` node, but don't check 'else if' statements.
|
|
if (node.alternate && node.alternate.type !== "IfStatement") {
|
|
validateStatement(node.alternate, "else");
|
|
}
|
|
},
|
|
WhileStatement: node => validateStatement(node.body, "while"),
|
|
DoWhileStatement: node => validateStatement(node.body, "do"),
|
|
ForStatement: node => validateStatement(node.body, "for"),
|
|
ForInStatement: node => validateStatement(node.body, "for"),
|
|
ForOfStatement: node => validateStatement(node.body, "for")
|
|
};
|
|
}
|
|
};
|