forked from unocss/unocss
/
handlers.ts
173 lines (147 loc) · 4.65 KB
/
handlers.ts
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import { escapeSelector } from '@unocss/core'
import { globalKeywords } from '../mappings'
// Not all, but covers most high frequency attributes
const cssProps = [
// basic props
'color', 'border-color', 'background-color', 'flex-grow', 'flex', 'flex-shrink',
'caret-color', 'font', 'gap', 'opacity', 'visibility', 'z-index', 'font-weight',
'zoom', 'text-shadow', 'transform', 'box-shadow',
// positions
'backround-position', 'left', 'right', 'top', 'bottom', 'object-position',
// sizes
'max-height', 'min-height', 'max-width', 'min-width', 'height', 'width',
'border-width', 'margin', 'padding', 'outline-width', 'outline-offset',
'font-size', 'line-height', 'text-indent', 'vertical-align',
'border-spacing', 'letter-spacing', 'word-spacing',
// enhances
'stroke', 'filter', 'backdrop-filter', 'fill', 'mask', 'mask-size', 'mask-border', 'clip-path', 'clip',
'border-radius',
]
const numberWithUnitRE = /^(-?[0-9.]+)(px|pt|pc|rem|em|%|vh|vw|in|cm|mm|ex|ch|vmin|vmax|cqw|cqh|cqi|cqb|cqmin|cqmax|rpx)?$/i
const numberRE = /^(-?[0-9.]+)$/i
const unitOnlyRE = /^(px)$/i
function round(n: number) {
return n.toFixed(10).replace(/\.0+$/, '').replace(/(\.\d+?)0+$/, '$1')
}
export function numberWithUnit(str: string) {
const match = str.match(numberWithUnitRE)
if (!match)
return
const [, n, unit] = match
const num = parseFloat(n)
if (unit && !Number.isNaN(num))
return `${round(num)}${unit}`
}
export function auto(str: string) {
if (str === 'auto' || str === 'a')
return 'auto'
}
export function rem(str: string) {
if (str.match(unitOnlyRE))
return `1${str}`
const match = str.match(numberWithUnitRE)
if (!match)
return
const [, n, unit] = match
const num = parseFloat(n)
if (!Number.isNaN(num))
return unit ? `${round(num)}${unit}` : `${round(num / 4)}rem`
}
export function px(str: string) {
if (str.match(unitOnlyRE))
return `1${str}`
const match = str.match(numberWithUnitRE)
if (!match)
return
const [, n, unit] = match
const num = parseFloat(n)
if (!Number.isNaN(num))
return unit ? `${round(num)}${unit}` : `${round(num)}px`
}
export function number(str: string) {
if (!numberRE.test(str))
return
const num = parseFloat(str)
if (!Number.isNaN(num))
return round(num)
}
export function percent(str: string) {
if (str.endsWith('%'))
str = str.slice(0, -1)
const num = parseFloat(str)
if (!Number.isNaN(num))
return `${round(num / 100)}`
}
export function fraction(str: string) {
if (str === 'full')
return '100%'
const [left, right] = str.split('/')
const num = parseFloat(left) / parseFloat(right)
if (!Number.isNaN(num))
return `${round(num * 100)}%`
}
const bracketTypeRe = /^\[(color|length|position):/i
function bracketWithType(str: string, type?: string) {
if (str && str.startsWith('[') && str.endsWith(']')) {
let base: string | undefined
const match = str.match(bracketTypeRe)
if (!match)
base = str.slice(1, -1)
else if (type && match[1] === type)
base = str.slice(match[0].length, -1)
if (base !== undefined) {
return base
.replace(/(url\(.*?\))/g, v => v.replace(/_/g, '\\_'))
.replace(/([^\\])_/g, '$1 ')
.replace(/(?:calc|clamp|max|min)\((.*)/g, (v) => {
return v.replace(/(-?\d*\.?\d(?!\b-.+[,)](?![^+\-/*])\D)(?:%|[a-z]+)?|\))([+\-/*])/g, '$1 $2 ')
})
}
}
}
export function bracket(str: string) {
return bracketWithType(str)
}
export function bracketOfColor(str: string) {
return bracketWithType(str, 'color')
}
export function bracketOfLength(str: string) {
return bracketWithType(str, 'length')
}
export function bracketOfPosition(str: string) {
return bracketWithType(str, 'position')
}
export function cssvar(str: string) {
if (str.match(/^\$\S/))
return `var(--${escapeSelector(str.slice(1))})`
}
export function time(str: string) {
const match = str.match(/^(-?[0-9.]+)(s|ms)?$/i)
if (!match)
return
const [, n, unit] = match
const num = parseFloat(n)
if (!Number.isNaN(num))
return unit ? `${round(num)}${unit}` : `${round(num)}ms`
}
export function degree(str: string) {
const match = str.match(/^(-?[0-9.]+)(deg|rad|grad|turn)?$/i)
if (!match)
return
const [, n, unit] = match
const num = parseFloat(n)
if (!Number.isNaN(num))
return unit ? `${round(num)}${unit}` : `${round(num)}deg`
}
export function global(str: string) {
if (globalKeywords.includes(str))
return str
}
export function properties(str: string) {
if (str.split(',').every(prop => cssProps.includes(prop)))
return str
}
export function position(str: string) {
if (['top', 'left', 'right', 'bottom', 'center'].includes(str))
return str
}