forked from zhurui/management
88 lines
3.1 KiB
JavaScript
88 lines
3.1 KiB
JavaScript
|
/**
|
||
|
|
* @fileoverview enforce the location of arrow function bodies
|
||
|
|
* @author Sharmila Jesupaul
|
||
|
|
*/
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Rule Definition
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
module.exports = {
|
||
|
|
meta: {
|
||
|
|
docs: {
|
||
|
|
description: "enforce the location of arrow function bodies",
|
||
|
|
category: "Stylistic Issues",
|
||
|
|
recommended: false,
|
||
|
|
url: "https://eslint.org/docs/rules/implicit-arrow-linebreak"
|
||
|
|
},
|
||
|
|
fixable: "whitespace",
|
||
|
|
schema: [
|
||
|
|
{
|
||
|
|
enum: ["beside", "below"]
|
||
|
|
}
|
||
|
|
]
|
||
|
|
},
|
||
|
|
|
||
|
|
create(context) {
|
||
|
|
const sourceCode = context.getSourceCode();
|
||
|
|
|
||
|
|
//----------------------------------------------------------------------
|
||
|
|
// Helpers
|
||
|
|
//----------------------------------------------------------------------
|
||
|
|
/**
|
||
|
|
* Gets the applicable preference for a particular keyword
|
||
|
|
* @returns {string} The applicable option for the keyword, e.g. 'beside'
|
||
|
|
*/
|
||
|
|
function getOption() {
|
||
|
|
return context.options[0] || "beside";
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Validates the location of an arrow function body
|
||
|
|
* @param {ASTNode} node The arrow function body
|
||
|
|
* @param {string} keywordName The applicable keyword name for the arrow function body
|
||
|
|
* @returns {void}
|
||
|
|
*/
|
||
|
|
function validateExpression(node) {
|
||
|
|
const option = getOption();
|
||
|
|
|
||
|
|
let tokenBefore = sourceCode.getTokenBefore(node.body);
|
||
|
|
const hasParens = tokenBefore.value === "(";
|
||
|
|
|
||
|
|
if (node.type === "BlockStatement") {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
let fixerTarget = node.body;
|
||
|
|
|
||
|
|
if (hasParens) {
|
||
|
|
|
||
|
|
// Gets the first token before the function body that is not an open paren
|
||
|
|
tokenBefore = sourceCode.getTokenBefore(node.body, token => token.value !== "(");
|
||
|
|
fixerTarget = sourceCode.getTokenAfter(tokenBefore);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (tokenBefore.loc.end.line === fixerTarget.loc.start.line && option === "below") {
|
||
|
|
context.report({
|
||
|
|
node: fixerTarget,
|
||
|
|
message: "Expected a linebreak before this expression.",
|
||
|
|
fix: fixer => fixer.insertTextBefore(fixerTarget, "\n")
|
||
|
|
});
|
||
|
|
} else if (tokenBefore.loc.end.line !== fixerTarget.loc.start.line && option === "beside") {
|
||
|
|
context.report({
|
||
|
|
node: fixerTarget,
|
||
|
|
message: "Expected no linebreak before this expression.",
|
||
|
|
fix: fixer => fixer.replaceTextRange([tokenBefore.range[1], fixerTarget.range[0]], " ")
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//----------------------------------------------------------------------
|
||
|
|
// Public
|
||
|
|
//----------------------------------------------------------------------
|
||
|
|
return {
|
||
|
|
ArrowFunctionExpression: node => validateExpression(node)
|
||
|
|
};
|
||
|
|
}
|
||
|
|
};
|