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import dlv from 'dlv'
import { State } from './state'
import removeMeta from './removeMeta'
import { ensureArray, dedupe, flatten } from './array'
import type { Color } from 'vscode-languageserver'
import { getClassNameParts } from './getClassNameAtPosition'
import * as jit from './jit'
import * as culori from 'culori'
import namedColors from 'color-name'
const COLOR_PROPS = [
'accent-color',
'caret-color',
'color',
'column-rule-color',
'background-color',
'border-color',
'border-top-color',
'border-right-color',
'border-bottom-color',
'border-left-color',
'fill',
'outline-color',
'stop-color',
'stroke',
'text-decoration-color',
]
export type KeywordColor = 'transparent' | 'currentColor'
function getKeywordColor(value: unknown): KeywordColor | null {
if (typeof value !== 'string') return null
let lowercased = value.toLowerCase()
if (lowercased === 'transparent') {
return 'transparent'
}
if (lowercased === 'currentcolor') {
return 'currentColor'
}
return null
}
// https://github.com/khalilgharbaoui/coloregex
const colorRegex = new RegExp(
`(?:^|\\s|\\(|,)(#(?:[0-9a-f]{2}){2,4}|(#[0-9a-f]{3})|(rgb|hsl)a?\\(\\s*(-?[\\d.]+%?(\\s*[,/]\\s*|\\s+)+){2,3}\\s*([\\d.]+%?|var\\([^)]+\\))?\\)|transparent|currentColor|${Object.keys(
namedColors
).join('|')})(?:$|\\s|\\)|,)`,
'gi'
)
function replaceColorVarsWithTheirDefaults(str: string): string {
// rgb(var(--primary, 66 66 66))
// -> rgb(66 66 66)
return str.replace(/((?:rgb|hsl)a?\(\s*)var\([^,]+,\s*([^)]+)\)/gi, '$1$2')
}
function getColorsInString(str: string): (culori.Color | KeywordColor)[] {
if (/(?:box|drop)-shadow/.test(str)) return []
return Array.from(replaceColorVarsWithTheirDefaults(str).matchAll(colorRegex), (match) => {
let color = match[1].replace(/var\([^)]+\)/, '1')
return getKeywordColor(color) ?? culori.parse(color)
}).filter(Boolean)
}
function getColorFromDecls(
decls: Record<string, string | string[]>
): culori.Color | KeywordColor | null {
let props = Object.keys(decls).filter((prop) => {
// ignore content: "";
if (
prop === 'content' &&
(decls[prop] === '""' || decls[prop] === "''" || decls[prop] === 'var(--tw-content)')
) {
return false
}
return true
})
if (props.length === 0) return null
const nonCustomProps = props.filter((prop) => !prop.startsWith('--'))
const areAllCustom = nonCustomProps.length === 0
if (!areAllCustom && nonCustomProps.some((prop) => !COLOR_PROPS.includes(prop))) {
// they should all be color-based props
return null
}
const propsToCheck = areAllCustom ? props : nonCustomProps
const colors = propsToCheck.flatMap((prop) => ensureArray(decls[prop]).flatMap(getColorsInString))
// check that all of the values are valid colors
// if (colors.some((color) => color instanceof TinyColor && !color.isValid)) {
// return null
// }
// check that all of the values are the same color, ignoring alpha
const colorStrings = dedupe(
colors.map((color) =>
typeof color === 'string' ? color : culori.formatRgb({ ...color, alpha: undefined })
)
)
if (colorStrings.length !== 1) {
return null
}
let keyword = getKeywordColor(colorStrings[0])
if (keyword) {
return keyword
}
const nonKeywordColors = colors.filter(
(color): color is culori.Color => typeof color !== 'string'
)
const alphas = dedupe(nonKeywordColors.map((color) => color.alpha ?? 1))
if (alphas.length === 1) {
return nonKeywordColors[0]
}
if (alphas.length === 2 && alphas.includes(0)) {
return nonKeywordColors.find((color) => (color.alpha ?? 1) !== 0)
}
return null
}
export function getColor(state: State, className: string): culori.Color | KeywordColor | null {
if (state.jit) {
if (state.classNames) {
const item = dlv(state.classNames.classNames, [className, '__info'])
if (item && item.__rule) {
return getColorFromDecls(removeMeta(item))
}
}
let { root, rules } = jit.generateRules(state, [className])
if (rules.length === 0) return null
let decls: Record<string, string | string[]> = {}
root.walkDecls((decl) => {
let value = decls[decl.prop]
if (value) {
if (Array.isArray(value)) {
value.push(decl.value)
} else {
decls[decl.prop] = [value, decl.value]
}
} else {
decls[decl.prop] = decl.value
}
})
return getColorFromDecls(decls)
}
let parts = getClassNameParts(state, className)
if (!parts) return null
const item = dlv(state.classNames.classNames, [...parts, '__info'])
if (!item.__rule) return null
return getColorFromDecls(removeMeta(item))
}
export function getColorFromValue(value: unknown): culori.Color | KeywordColor | null {
if (typeof value !== 'string') return null
const trimmedValue = value.trim()
if (trimmedValue.toLowerCase() === 'transparent') {
return 'transparent'
}
if (trimmedValue.toLowerCase() === 'currentcolor') {
return 'currentColor'
}
if (
!/^\s*(?:rgba?|hsla?)\s*\([^)]+\)\s*$/.test(trimmedValue) &&
!/^\s*#[0-9a-f]+\s*$/i.test(trimmedValue) &&
!Object.keys(namedColors).includes(trimmedValue)
) {
return null
}
const color = culori.parse(trimmedValue)
return color ?? null
}
let toRgb = culori.converter('rgb')
export function culoriColorToVscodeColor(color: culori.Color): Color {
let rgb = toRgb(color)
return { red: rgb.r, green: rgb.g, blue: rgb.b, alpha: rgb.alpha ?? 1 }
}
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