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index.js
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index.js
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const { createPlugin } = require('stylelint')
const styleSearch = require('style-search')
const isStandardSyntaxRule = require('stylelint/lib/utils/isStandardSyntaxRule')
const report = require('stylelint/lib/utils/report')
const ruleMessages = require('stylelint/lib/utils/ruleMessages')
const validateOptions = require('stylelint/lib/utils/validateOptions')
const whitespaceChecker = require('stylelint/lib/utils/whitespaceChecker')
const ruleName = 'stylistic/selector-list-comma-newline-after'
const messages = ruleMessages(ruleName, {
expectedAfter: () => 'Expected newline after ","',
expectedAfterMultiLine: () => 'Expected newline after "," in a multi-line list',
rejectedAfterMultiLine: () => 'Unexpected whitespace after "," in a multi-line list',
})
const meta = {
url: 'https://github.com/elirasza/stylelint-stylistic/tree/main/lib/rules/selector-list-comma-newline-after',
fixable: true,
}
/** @type {import('stylelint').Rule} */
const rule = (primary, _secondaryOptions, context) => {
const checker = whitespaceChecker('newline', primary, messages)
return (root, result) => {
const validOptions = validateOptions(result, ruleName, {
actual: primary,
possible: ['always', 'always-multi-line', 'never-multi-line'],
})
if (!validOptions) {
return
}
root.walkRules((ruleNode) => {
if (!isStandardSyntaxRule(ruleNode)) {
return
}
// Get raw selector so we can allow end-of-line comments, e.g.
// a, /* comment */
// b {}
const selector = ruleNode.raws.selector ? ruleNode.raws.selector.raw : ruleNode.selector
/** @type {number[]} */
const fixIndices = []
styleSearch(
{
source: selector,
target: ',',
functionArguments: 'skip',
},
(match) => {
const nextChars = selector.slice(match.endIndex)
// If there's a // comment, that means there has to be a newline
// ending the comment so we're fine
if (/^\s+\/\//.test(nextChars)) {
return
}
// If there are spaces and then a comment begins, look for the newline
const indextoCheckAfter = /^\s+\/\*/.test(nextChars)
? selector.indexOf('*/', match.endIndex) + 1
: match.startIndex
checker.afterOneOnly({
source: selector,
index: indextoCheckAfter,
err: (m) => {
if (context.fix) {
fixIndices.push(indextoCheckAfter + 1)
return
}
report({
message: m,
node: ruleNode,
index: match.startIndex,
result,
ruleName,
})
},
})
},
)
if (fixIndices.length) {
let fixedSelector = selector
for (const index of fixIndices.sort((a, b) => b - a)) {
const beforeSelector = fixedSelector.slice(0, index)
let afterSelector = fixedSelector.slice(index)
if (primary.startsWith('always')) {
afterSelector = context.newline + afterSelector
} else if (primary.startsWith('never-multi-line')) {
afterSelector = afterSelector.replace(/^\s*/, '')
}
fixedSelector = beforeSelector + afterSelector
}
if (ruleNode.raws.selector) {
ruleNode.raws.selector.raw = fixedSelector
} else {
ruleNode.selector = fixedSelector
}
}
})
}
}
rule.ruleName = ruleName
rule.messages = messages
rule.meta = meta
module.exports = { messages, meta, plugin: createPlugin(ruleName, rule), rule, ruleName }