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import {Equivalence as EQ, Record} from 'effect'
import type {LazyArg} from 'effect/Function'
import {
HStrutEquivalence,
VStrutEquivalence,
type HStruts,
type VStruts,
} from '../struts.js'
/**
* @category drawing
*/
export const horizontalAlignments = ['left', 'center', 'right'] as const
/**
* @category drawing
*/
export const verticalAlignments = ['top', 'middle', 'bottom'] as const
/**
* @category drawing
*/
export type HorizontalAlignment = (typeof horizontalAlignments)[number]
/**
* @category drawing
*/
export type VerticalAlignment = (typeof verticalAlignments)[number]
/**
* ```ts
* {
* vAlign: VerticalAlignment
* top: VStrut
* bottom: VStrut
* }
* ```
* @category drawing
*/
export interface VerticallyAligned extends VStruts {
vAlign: VerticalAlignment
}
/**
* ```ts
* {
* hAlign: HorizontalAlignment
* left: HStrut
* right: HStrut
* }
* ```
* @category drawing
*/
export interface HorizontallyAligned extends HStruts {
hAlign: HorizontalAlignment
}
/**
* @category drawing
*/
export interface Aligned extends HorizontallyAligned, VerticallyAligned {}
/**
* @category drawing
* @function
*/
export const matchHorizontal =
<R>(onLeft: LazyArg<R>, onCenter: LazyArg<R>, onRight: LazyArg<R>) =>
(o: HorizontalAlignment): R =>
o === 'left' ? onLeft() : o === 'center' ? onCenter() : onRight()
/**
* @category drawing
* @function
*/
export const matchVertical =
<R>(onTop: LazyArg<R>, onMiddle: LazyArg<R>, onBottom: LazyArg<R>) =>
(o: VerticalAlignment): R =>
o === 'top' ? onTop() : o === 'middle' ? onMiddle() : onBottom()
/**
* @category drawing
* @function
*/
export const mapHorizontalAlignments = <A>(
f: (align: HorizontalAlignment, n: number) => A,
): [A, A, A] => [f('left', 0), f('center', 1), f('right', 2)]
/**
* @category drawing
* @function
*/
export const mapVerticalAlignments = <A>(
f: (align: VerticalAlignment, n: number) => A,
): [A, A, A] => [f('top', 0), f('middle', 1), f('bottom', 2)]
/**
* @category drawing
* @function
*/
export const forHorizontalAlignments = <R>(
f: (align: HorizontalAlignment, n: number) => R,
) =>
Record.fromEntries(
mapHorizontalAlignments((hAlign, n) => [hAlign, f(hAlign, n)] as const),
) as Record<HorizontalAlignment, R>
/**
* @category drawing
* @function
*/
export const forVerticalAlignments = <R>(
f: (align: VerticalAlignment, n: number) => R,
) =>
Record.fromEntries(
mapVerticalAlignments((vAlign, n) => [vAlign, f(vAlign, n)] as const),
) as Record<VerticalAlignment, R>
const alignMarkers = {
left: '⮄',
center: '⮂',
right: '⮆',
top: '⮅',
middle: '⮁',
bottom: '⮇',
} satisfies Record<HorizontalAlignment | VerticalAlignment, string>
/**
* @category drawing
* @function
*/
export const showAlignment = (
align: HorizontalAlignment | VerticalAlignment,
): string => alignMarkers[align]
/**
* @category drawing
* @function
*/
export const showAlignments = ({
hAlign,
vAlign,
}: {
hAlign: HorizontalAlignment
vAlign: VerticalAlignment
}): string => unwords.rest(showAlignment(hAlign), showAlignment(vAlign))
/**
* Equivalence for {@link HorizontallyAligned}.
* @category drawing
* @function
*/
export const HorizontalEquivalence: EQ.Equivalence<HorizontallyAligned> =
EQ.struct({
left: HStrutEquivalence,
right: HStrutEquivalence,
hAlign: stringEquivalence,
})
/**
* Equivalence for {@link VerticallyAligned}.
* @category drawing
* @function
*/
export const VerticalEquivalence: EQ.Equivalence<VerticallyAligned> = EQ.struct(
{
top: VStrutEquivalence,
bottom: VStrutEquivalence,
vAlign: stringEquivalence,
},
)
/**
* Equivalence for {@link Aligned}.
* @category drawing
* @function
*/
export const AlignedEquivalence: EQ.Equivalence<Aligned> = EQ.combine(
HorizontalEquivalence as EQ.Equivalence<Aligned>,
VerticalEquivalence as EQ.Equivalence<Aligned>,
)
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