121 lines
3.9 KiB
JavaScript
121 lines
3.9 KiB
JavaScript
/**
|
|
* @fileoverview Rule to enforce spacing around embedded expressions of template strings
|
|
* @author Toru Nagashima
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Requirements
|
|
//------------------------------------------------------------------------------
|
|
|
|
const astUtils = require("../ast-utils");
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Helpers
|
|
//------------------------------------------------------------------------------
|
|
|
|
const OPEN_PAREN = /\$\{$/;
|
|
const CLOSE_PAREN = /^\}/;
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
module.exports = {
|
|
meta: {
|
|
docs: {
|
|
description: "require or disallow spacing around embedded expressions of template strings",
|
|
category: "ECMAScript 6",
|
|
recommended: false
|
|
},
|
|
|
|
fixable: "whitespace",
|
|
|
|
schema: [
|
|
{ enum: ["always", "never"] }
|
|
]
|
|
},
|
|
|
|
create(context) {
|
|
const sourceCode = context.getSourceCode();
|
|
const always = context.options[0] === "always";
|
|
const prefix = always ? "Expected" : "Unexpected";
|
|
|
|
/**
|
|
* Checks spacing before `}` of a given token.
|
|
* @param {Token} token - A token to check. This is a Template token.
|
|
* @returns {void}
|
|
*/
|
|
function checkSpacingBefore(token) {
|
|
const prevToken = sourceCode.getTokenBefore(token);
|
|
|
|
if (prevToken &&
|
|
CLOSE_PAREN.test(token.value) &&
|
|
astUtils.isTokenOnSameLine(prevToken, token) &&
|
|
sourceCode.isSpaceBetweenTokens(prevToken, token) !== always
|
|
) {
|
|
context.report({
|
|
loc: token.loc.start,
|
|
message: "{{prefix}} space(s) before '}'.",
|
|
data: {
|
|
prefix
|
|
},
|
|
fix(fixer) {
|
|
if (always) {
|
|
return fixer.insertTextBefore(token, " ");
|
|
}
|
|
return fixer.removeRange([
|
|
prevToken.range[1],
|
|
token.range[0]
|
|
]);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks spacing after `${` of a given token.
|
|
* @param {Token} token - A token to check. This is a Template token.
|
|
* @returns {void}
|
|
*/
|
|
function checkSpacingAfter(token) {
|
|
const nextToken = sourceCode.getTokenAfter(token);
|
|
|
|
if (nextToken &&
|
|
OPEN_PAREN.test(token.value) &&
|
|
astUtils.isTokenOnSameLine(token, nextToken) &&
|
|
sourceCode.isSpaceBetweenTokens(token, nextToken) !== always
|
|
) {
|
|
context.report({
|
|
loc: {
|
|
line: token.loc.end.line,
|
|
column: token.loc.end.column - 2
|
|
},
|
|
message: "{{prefix}} space(s) after '${'.",
|
|
data: {
|
|
prefix
|
|
},
|
|
fix(fixer) {
|
|
if (always) {
|
|
return fixer.insertTextAfter(token, " ");
|
|
}
|
|
return fixer.removeRange([
|
|
token.range[1],
|
|
nextToken.range[0]
|
|
]);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
return {
|
|
TemplateElement(node) {
|
|
const token = sourceCode.getFirstToken(node);
|
|
|
|
checkSpacingBefore(token);
|
|
checkSpacingAfter(token);
|
|
}
|
|
};
|
|
}
|
|
};
|