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index.js
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index.js
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const { createPlugin } = require('stylelint')
const beforeBlockString = require('stylelint/lib/utils/beforeBlockString')
const blockString = require('stylelint/lib/utils/blockString')
const hasBlock = require('stylelint/lib/utils/hasBlock')
const hasEmptyBlock = require('stylelint/lib/utils/hasEmptyBlock')
const optionsMatches = require('stylelint/lib/utils/optionsMatches')
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 { isRegExp, isString } = require('stylelint/lib/utils/validateTypes')
const ruleName = 'stylistic/block-opening-brace-space-before'
const messages = ruleMessages(ruleName, {
expectedBefore: () => 'Expected single space before "{"',
rejectedBefore: () => 'Unexpected whitespace before "{"',
expectedBeforeSingleLine: () => 'Expected single space before "{" of a single-line block',
rejectedBeforeSingleLine: () => 'Unexpected whitespace before "{" of a single-line block',
expectedBeforeMultiLine: () => 'Expected single space before "{" of a multi-line block',
rejectedBeforeMultiLine: () => 'Unexpected whitespace before "{" of a multi-line block',
})
const meta = {
url: 'https://github.com/elirasza/stylelint-stylistic/tree/main/lib/rules/block-opening-brace-space-before',
fixable: true,
}
/** @type {import('stylelint').Rule} */
const rule = (primary, secondaryOptions, context) => {
const checker = whitespaceChecker('space', primary, messages)
return (root, result) => {
const validOptions = validateOptions(
result,
ruleName,
{
actual: primary,
possible: [
'always',
'never',
'always-single-line',
'never-single-line',
'always-multi-line',
'never-multi-line',
],
},
{
actual: secondaryOptions,
possible: {
ignoreAtRules: [isString, isRegExp],
ignoreSelectors: [isString, isRegExp],
},
optional: true,
},
)
if (!validOptions) {
return
}
// Check both kinds of statements: rules and at-rules
root.walkRules(check)
root.walkAtRules(check)
/**
* @param {import('postcss').Rule | import('postcss').AtRule} statement
*/
function check(statement) {
// Return early if blockless or has an empty block
if (!hasBlock(statement) || hasEmptyBlock(statement)) {
return
}
// Return early if at-rule is to be ignored
if (
statement.type === 'atrule'
&& optionsMatches(secondaryOptions, 'ignoreAtRules', statement.name)
) {
return
}
// Return early if selector is to be ignored
if (
statement.type === 'rule'
&& optionsMatches(secondaryOptions, 'ignoreSelectors', statement.selector)
) {
return
}
const source = beforeBlockString(statement)
const beforeBraceNoRaw = beforeBlockString(statement, {
noRawBefore: true,
})
let index = beforeBraceNoRaw.length - 1
if (beforeBraceNoRaw[index - 1] === '\r') {
index -= 1
}
checker.before({
source,
index: source.length,
lineCheckStr: blockString(statement),
err: (m) => {
if (context.fix) {
if (primary.startsWith('always')) {
statement.raws.between = ' '
return
}
if (primary.startsWith('never')) {
statement.raws.between = ''
return
}
}
report({
message: m,
node: statement,
index,
result,
ruleName,
})
},
})
}
}
}
rule.ruleName = ruleName
rule.messages = messages
rule.meta = meta
module.exports = { messages, meta, plugin: createPlugin(ruleName, rule), rule, ruleName }