/
selector-list-comma.js
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/
selector-list-comma.js
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"use strict"
const {
utils: { ruleMessages, validateOptions, report },
} = require("stylelint")
const {
getSelectorTokens,
isSelectorToken,
setSelector,
} = require("../utils/selector")
const { isLinebreak } = require("../utils/tokens")
const { inCssLiteral } = require("../utils/nodes")
const ruleName = "stylus/selector-list-comma"
module.exports = {
ruleName,
rule,
meta: {
docs: {
description: "require or disallow selector list comma.",
category: "standard",
},
fixable: true,
},
}
const messages = ruleMessages(ruleName, {
rejected: "Unexpected comma",
expected: "Expected comma",
})
function rule(expectation, _secondary, context) {
return (root, result) => {
if (root.source.lang !== "stylus") {
return
}
const validOptions = validateOptions(result, ruleName, {
actual: expectation,
possible: ["always", "never"],
})
if (!validOptions) {
return
}
root.walkRules(verifyNode)
function verifyNode(node) {
if (inCssLiteral(node)) {
return
}
const selector =
(node.raws.selector &&
(node.raws.selector.stylus || node.raws.selector.raw)) ||
node.selector
if (expectation === "always") {
verifyAlways(node, selector)
} else {
verifyNever(node, selector)
}
}
function verifyAlways(node, selectorText) {
const forbiddenLinebreaks = []
const selectors = getSelectorTokens(selectorText)
for (const { separator, selector } of selectors) {
if (isLinebreak(separator)) {
forbiddenLinebreaks.push({
lastToken: selector[selector.length - 1],
separator,
})
}
}
if (!forbiddenLinebreaks.length) {
return
}
// auto-fix
if (context.fix) {
let newStylusSelector = ""
let start = 0
for (const { lastToken } of forbiddenLinebreaks) {
const index = lastToken.range[1]
newStylusSelector += `${selectorText.slice(start, index)},`
start = index
}
newStylusSelector += selectorText.slice(start)
setSelector(node, newStylusSelector)
return
}
for (const { separator } of forbiddenLinebreaks) {
report({
message: messages.rejected,
node,
index: separator.range[0],
result,
ruleName,
})
}
}
function verifyNever(node, selectorText) {
const forbiddenCommas = []
const selectors = getSelectorTokens(selectorText)
for (
let selectorIndex = 0;
selectorIndex < selectors.length;
selectorIndex++
) {
const { separator } = selectors[selectorIndex]
if (separator && separator.value === ",") {
forbiddenCommas.push({
selectorIndex,
separator,
})
}
}
if (!forbiddenCommas.length) {
return
}
// auto-fix
if (context.fix) {
let newStylusSelector = ""
let start = 0
for (const { selectorIndex, separator } of forbiddenCommas) {
const index = separator.range[0]
const before = selectorText.slice(start, index)
newStylusSelector += before
const beforeToken = selectors[selectorIndex].selector
.filter(isSelectorToken)
.slice(-1)[0]
const afterToken = (
selectors[selectorIndex + 1] || { selector: [] }
).selector.filter(isSelectorToken)[0]
if (!isLinebreak(beforeToken) && !isLinebreak(afterToken)) {
newStylusSelector += context.newline
}
start = index + 1
}
newStylusSelector += selectorText.slice(start)
setSelector(node, newStylusSelector)
return
}
for (const { separator } of forbiddenCommas) {
report({
message: messages.rejected,
node,
index: separator.range[0],
result,
ruleName,
})
}
}
}
}