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const dlv = require('dlv')
import { State } from './state'
import removeMeta from './removeMeta'
import { TinyColor, names as colorNames } from '@ctrl/tinycolor'
import { ensureArray, dedupe, flatten } from './array'
import type { Color } from 'vscode-languageserver'
import { getClassNameParts } from './getClassNameAtPosition'
import * as jit from './jit'
const COLOR_PROPS = [
'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',
]
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(
`(#(?:[0-9a-f]{2}){2,4}|(#[0-9a-f]{3})|(rgb|hsl)a?\\((-?[\\d.]+%?[,\\s]+){2,3}\\s*([\\d.]+%?|var\\([^)]+\\))?\\)|transparent|currentColor|${Object.keys(
colorNames
).join('|')})`,
'gi'
)
function getColorsInString(str: string): (TinyColor | KeywordColor)[] {
if (/(?:box|drop)-shadow/.test(str)) return []
return (
str
.match(colorRegex)
?.map((color) => color.replace(/var\([^)]+\)/, '1'))
.map((color) => getKeywordColor(color) ?? new TinyColor(color))
.filter((color) => (color instanceof TinyColor ? color.isValid : true)) ?? []
)
}
function getColorFromDecls(
decls: Record<string, string | string[]>
): TinyColor | KeywordColor | null {
let props = Object.keys(decls).filter((prop) => {
// ignore content: "";
if (prop === 'content' && (decls[prop] === '""' || decls[prop] === "''")) {
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) => (color instanceof TinyColor ? `${color.r}-${color.g}-${color.b}` : color))
)
if (colorStrings.length !== 1) {
return null
}
let keyword = getKeywordColor(colorStrings[0])
if (keyword) {
return keyword
}
const nonKeywordColors = colors.filter((color): color is TinyColor => typeof color !== 'string')
const alphas = dedupe(nonKeywordColors.map((color) => color.a))
if (alphas.length === 1) {
return nonKeywordColors[0]
}
if (alphas.length === 2 && alphas.includes(0)) {
return nonKeywordColors.find((color) => color.a !== 0)
}
return null
}
export function getColor(state: State, className: string): TinyColor | KeywordColor | null {
if (state.jit) {
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): TinyColor | 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(colorNames).includes(trimmedValue)
) {
return null
}
const color = new TinyColor(trimmedValue)
if (color.isValid) {
return color
// return { red: color.r / 255, green: color.g / 255, blue: color.b / 255, alpha: color.a }
}
return null
}
function createColor(str: string): TinyColor | KeywordColor {
let keyword = getKeywordColor(str)
if (keyword) {
return keyword
}
// matches: rgba(<r>, <g>, <b>, var(--bg-opacity))
// TODO: support other formats? e.g. hsla, css level 4
const match = str.match(
/^\s*rgba\(\s*(?<r>[0-9.]+)\s*,\s*(?<g>[0-9.]+)\s*,\s*(?<b>[0-9.]+)\s*,\s*var/
)
if (match) {
return new TinyColor({
r: match.groups.r,
g: match.groups.g,
b: match.groups.b,
})
}
return new TinyColor(str)
}
export function tinyColorToVscodeColor(color: TinyColor): Color {
return { red: color.r / 255, green: color.g / 255, blue: color.b / 255, alpha: color.a }
}
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