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/**
* @typedef {object} ScreenValue
* @property {number|undefined} min
* @property {number|undefined} max
* @property {string|undefined} raw
*/
/**
* @typedef {object} Screen
* @property {string} name
* @property {boolean} not
* @property {ScreenValue[]} values
*/
/**
* A function that normalizes the various forms that the screens object can be
* provided in.
*
* Input(s):
* - ['100px', '200px'] // Raw strings
* - { sm: '100px', md: '200px' } // Object with string values
* - { sm: { min: '100px' }, md: { max: '100px' } } // Object with object values
* - { sm: [{ min: '100px' }, { max: '200px' }] } // Object with object array (multiple values)
*
* Output(s):
* - [{ name: 'sm', values: [{ min: '100px', max: '200px' }] }] // List of objects, that contains multiple values
*
* @returns {Screen[]}
*/
export function normalizeScreens(screens, root = true) {
if (Array.isArray(screens)) {
return screens.map((screen) => {
if (root && Array.isArray(screen)) {
throw new Error('The tuple syntax is not supported for `screens`.')
}
if (typeof screen === 'string') {
return { name: screen.toString(), not: false, values: [{ min: screen, max: undefined }] }
}
let [name, options] = screen
name = name.toString()
if (typeof options === 'string') {
return { name, not: false, values: [{ min: options, max: undefined }] }
}
if (Array.isArray(options)) {
return { name, not: false, values: options.map((option) => resolveValue(option)) }
}
return { name, not: false, values: [resolveValue(options)] }
})
}
return normalizeScreens(Object.entries(screens ?? {}), false)
}
/**
* @param {Screen} screen
* @returns {{result: false, reason: string} | {result: true, reason: null}}
*/
export function isScreenSortable(screen) {
if (screen.values.length !== 1) {
return { result: false, reason: 'multiple-values' }
} else if (screen.values[0].raw !== undefined) {
return { result: false, reason: 'raw-values' }
} else if (screen.values[0].min !== undefined && screen.values[0].max !== undefined) {
return { result: false, reason: 'min-and-max' }
}
return { result: true, reason: null }
}
/**
* @param {'min' | 'max'} type
* @param {Screen | 'string'} a
* @param {Screen | 'string'} z
* @returns {number}
*/
export function compareScreens(type, a, z) {
let aScreen = toScreen(a, type)
let zScreen = toScreen(z, type)
let aSorting = isScreenSortable(aScreen)
let bSorting = isScreenSortable(zScreen)
// These cases should never happen and indicate a bug in Tailwind CSS itself
if (aSorting.reason === 'multiple-values' || bSorting.reason === 'multiple-values') {
throw new Error(
'Attempted to sort a screen with multiple values. This should never happen. Please open a bug report.'
)
} else if (aSorting.reason === 'raw-values' || bSorting.reason === 'raw-values') {
throw new Error(
'Attempted to sort a screen with raw values. This should never happen. Please open a bug report.'
)
} else if (aSorting.reason === 'min-and-max' || bSorting.reason === 'min-and-max') {
throw new Error(
'Attempted to sort a screen with both min and max values. This should never happen. Please open a bug report.'
)
}
// Let the sorting begin
let { min: aMin, max: aMax } = aScreen.values[0]
let { min: zMin, max: zMax } = zScreen.values[0]
// Negating screens flip their behavior. Basically `not min-width` is `max-width`
if (a.not) [aMin, aMax] = [aMax, aMin]
if (z.not) [zMin, zMax] = [zMax, zMin]
aMin = aMin === undefined ? aMin : parseFloat(aMin)
aMax = aMax === undefined ? aMax : parseFloat(aMax)
zMin = zMin === undefined ? zMin : parseFloat(zMin)
zMax = zMax === undefined ? zMax : parseFloat(zMax)
let [aValue, zValue] = type === 'min' ? [aMin, zMin] : [zMax, aMax]
return aValue - zValue
}
/**
*
* @param {PartialScreen> | string} value
* @param {'min' | 'max'} type
* @returns {Screen}
*/
export function toScreen(value, type) {
if (typeof value === 'object') {
return value
}
return {
name: 'arbitrary-screen',
values: [{ [type]: value }],
}
}
function resolveValue({ 'min-width': _minWidth, min = _minWidth, max, raw } = {}) {
return { min, max, raw }
}