Initial commit

This commit is contained in:
Patrick Marsceill
2017-03-09 13:16:08 -05:00
commit b7b0d0d7bf
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# value-list-comma-space-before
Require a single space or disallow whitespace before the commas of value lists.
```css
a { background-size: 0 ,0; }
/** ↑
* The space before these commas */
```
## Options
`string`: `"always"|"never"|"always-single-line"|"never-single-line"`
### `"always"`
There *must always* be a single space before the commas.
The following patterns are considered warnings:
```css
a { background-size: 0,0; }
```
```css
a { background-size: 0
, 0; }
```
The following patterns are *not* considered warnings:
```css
a { background-size: 0 ,0; }
```
```css
a { background-size: 0 ,
0; }
```
### `"never"`
There *must never* be whitespace before the commas.
The following patterns are considered warnings:
```css
a { background-size: 0 ,0; }
```
```css
a { background-size: 0 ,
0; }
```
The following patterns are *not* considered warnings:
```css
a { background-size: 0,0; }
```
```css
a { background-size: 0,
0; }
```
### `"always-single-line"`
There *must always* be a single space before the commas in single-line value lists.
The following patterns are considered warnings:
```css
a { background-size: 0,0; }
```
The following patterns are *not* considered warnings:
```css
a { background-size: 0 ,0; }
```
```css
a { background-size: 0 ,
0; }
```
```css
a { background-size: 0
, 0; }
```
### `"never-single-line"`
There *must never* be whitespace before the commas in single-line value lists.
The following patterns are considered warnings:
```css
a { background-size: 0 ,0; }
```
The following patterns are *not* considered warnings:
```css
a { background-size: 0,0; }
```
```css
a { background-size: 0,
0; }
```
```css
a { background-size: 0 ,
0; }
```

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"use strict"
const ruleMessages = require("../../utils/ruleMessages")
const validateOptions = require("../../utils/validateOptions")
const whitespaceChecker = require("../../utils/whitespaceChecker")
const valueListCommaWhitespaceChecker = require("../valueListCommaWhitespaceChecker")
const ruleName = "value-list-comma-space-before"
const messages = ruleMessages(ruleName, {
expectedBefore: () => "Expected single space before \",\"",
rejectedBefore: () => "Unexpected whitespace before \",\"",
expectedBeforeSingleLine: () => "Unexpected whitespace before \",\" in a single-line list",
rejectedBeforeSingleLine: () => "Unexpected whitespace before \",\" in a single-line list",
})
const rule = function (expectation) {
const checker = whitespaceChecker("space", expectation, messages)
return (root, result) => {
const validOptions = validateOptions(result, ruleName, {
actual: expectation,
possible: [
"always",
"never",
"always-single-line",
"never-single-line",
],
})
if (!validOptions) {
return
}
valueListCommaWhitespaceChecker({
root,
result,
locationChecker: checker.before,
checkedRuleName: ruleName,
})
}
}
rule.ruleName = ruleName
rule.messages = messages
module.exports = rule