Style cleanup

.changeset/gentle-berries-decide.md

@@ -0,0 +1,5 @@
+---
+"@siteimprove/alfa-css": patch
+---
+
+**Added:** all `Value` subtype now correctly implement the `(Partially)Resovable` interfaces.

.changeset/pretty-waves-peel.md

@@ -0,0 +1,5 @@
+---
+"@siteimprove/alfa-css": minor
+---
+
+**Breaking:** `Image.partiallyResolve()` and `Shape.partiallyResolve()` functions has been replaced by instance methods of the same name.

docs/review/api/alfa-style.api.md

@@ -35,6 +35,7 @@ import { Percentage } from '@siteimprove/alfa-css';
 import { Position } from '@siteimprove/alfa-css';
 import { Predicate } from '@siteimprove/alfa-predicate';
 import { Rectangle } from '@siteimprove/alfa-css';
+import type { Resolvable } from '@siteimprove/alfa-css';
 import { Rotate } from '@siteimprove/alfa-css';
 import { Serializable } from '@siteimprove/alfa-json';
 import { Shadow } from '@siteimprove/alfa-css';
@@ -136,7 +137,7 @@ export namespace Longhands {
         readonly "border-end-start-radius": Longhand<Tuple<[horizontal: LengthPercentage, vertical: LengthPercentage]>, Tuple<[horizontal: LengthPercentage, vertical: LengthPercentage]>>;
         readonly "border-image-outset": Longhand<Specified_2, Tuple<[top: Length | Number_2, right: Length | Number_2, bottom: Length | Number_2, left: Length | Number_2]>>;
         readonly "border-image-repeat": Longhand<Specified_4, Specified_4>;
-        readonly "border-image-slice": Longhand<Specified_6, Specified_6>;
+        readonly "border-image-slice": Longhand<Specified_6, Tuple<[top: Number_2.Fixed | Percentage.Canonical, right: Number_2.Fixed | Percentage.Canonical, bottom: Number_2.Fixed | Percentage.Canonical, left: Number_2.Fixed | Percentage.Canonical]> | Tuple<[top: Number_2.Fixed | Percentage.Canonical, right: Number_2.Fixed | Percentage.Canonical, bottom: Number_2.Fixed | Percentage.Canonical, left: Number_2.Fixed | Percentage.Canonical, fill: Keyword<"fill">]>>;
         readonly "border-image-source": Longhand<Specified_7, Image.PartiallyResolved | Keyword<"none">>;
         readonly "border-image-width": Longhand<Specified_8, Tuple<[top: Number_2.Fixed | LengthPercentage | Keyword<"auto">, right: Number_2.Fixed | LengthPercentage | Keyword<"auto">, bottom: Number_2.Fixed | LengthPercentage | Keyword<"auto">, left: Number_2.Fixed | LengthPercentage | Keyword<"auto">]>>;
         readonly "border-inline-end-color": Longhand<Color, Color.Canonical>;
@@ -163,14 +164,14 @@ export namespace Longhands {
         readonly "clip-path": Longhand<URL | Keyword<"none"> | Shape<Shape.Basic, Box.Geometry>, URL | Keyword<"none"> | Shape<Shape.Basic, Box.Geometry>>;
         readonly clip: Longhand<Keyword<"auto"> | Shape<Rectangle<Length | Rectangle.Auto>, Keyword<"border-box">>, Keyword<"auto"> | Shape<Rectangle<Length | Rectangle.Auto>, Keyword<"border-box">>>;
         readonly color: Longhand<Color, Color.Canonical>;
-        readonly cursor: Longhand<Tuple<[List<URL | Tuple<[URL, Number_2, Number_2]>>, Keyword<"auto"> | Keyword<"none"> | Keyword<"default"> | Keyword<"context-menu"> | Keyword<"help"> | Keyword<"pointer"> | Keyword<"progress"> | Keyword<"wait"> | Keyword<"cell"> | Keyword<"crosshair"> | Keyword<"text"> | Keyword<"vertical-text"> | Keyword<"alias"> | Keyword<"copy"> | Keyword<"move"> | Keyword<"no-drop"> | Keyword<"not-allowed"> | Keyword<"grab"> | Keyword<"grabbing"> | Keyword<"e-resize"> | Keyword<"n-resize"> | Keyword<"ne-resize"> | Keyword<"nw-resize"> | Keyword<"s-resize"> | Keyword<"se-resize"> | Keyword<"sw-resize"> | Keyword<"w-resize"> | Keyword<"ew-resize"> | Keyword<"ns-resize"> | Keyword<"nesw-resize"> | Keyword<"nwse-resize"> | Keyword<"col-resize"> | Keyword<"row-resize"> | Keyword<"all-scroll"> | Keyword<"zoom-in"> | Keyword<"zoom-out">]>, Tuple<[List<URL | Tuple<[URL, Number_2, Number_2]>>, Keyword<"auto"> | Keyword<"none"> | Keyword<"default"> | Keyword<"context-menu"> | Keyword<"help"> | Keyword<"pointer"> | Keyword<"progress"> | Keyword<"wait"> | Keyword<"cell"> | Keyword<"crosshair"> | Keyword<"text"> | Keyword<"vertical-text"> | Keyword<"alias"> | Keyword<"copy"> | Keyword<"move"> | Keyword<"no-drop"> | Keyword<"not-allowed"> | Keyword<"grab"> | Keyword<"grabbing"> | Keyword<"e-resize"> | Keyword<"n-resize"> | Keyword<"ne-resize"> | Keyword<"nw-resize"> | Keyword<"s-resize"> | Keyword<"se-resize"> | Keyword<"sw-resize"> | Keyword<"w-resize"> | Keyword<"ew-resize"> | Keyword<"ns-resize"> | Keyword<"nesw-resize"> | Keyword<"nwse-resize"> | Keyword<"col-resize"> | Keyword<"row-resize"> | Keyword<"all-scroll"> | Keyword<"zoom-in"> | Keyword<"zoom-out">]>>;
+        readonly cursor: Longhand<Tuple<[List<URL | Tuple<[URL, Number_2, Number_2]>>, Keyword<"auto"> | Keyword<"none"> | Keyword<"default"> | Keyword<"context-menu"> | Keyword<"help"> | Keyword<"pointer"> | Keyword<"progress"> | Keyword<"wait"> | Keyword<"cell"> | Keyword<"crosshair"> | Keyword<"text"> | Keyword<"vertical-text"> | Keyword<"alias"> | Keyword<"copy"> | Keyword<"move"> | Keyword<"no-drop"> | Keyword<"not-allowed"> | Keyword<"grab"> | Keyword<"grabbing"> | Keyword<"e-resize"> | Keyword<"n-resize"> | Keyword<"ne-resize"> | Keyword<"nw-resize"> | Keyword<"s-resize"> | Keyword<"se-resize"> | Keyword<"sw-resize"> | Keyword<"w-resize"> | Keyword<"ew-resize"> | Keyword<"ns-resize"> | Keyword<"nesw-resize"> | Keyword<"nwse-resize"> | Keyword<"col-resize"> | Keyword<"row-resize"> | Keyword<"all-scroll"> | Keyword<"zoom-in"> | Keyword<"zoom-out">]>, Tuple<[List<URL | Tuple<[URL, Number_2.Fixed, Number_2.Fixed]>>, Keyword<"auto"> | Keyword<"none"> | Keyword<"default"> | Keyword<"context-menu"> | Keyword<"help"> | Keyword<"pointer"> | Keyword<"progress"> | Keyword<"wait"> | Keyword<"cell"> | Keyword<"crosshair"> | Keyword<"text"> | Keyword<"vertical-text"> | Keyword<"alias"> | Keyword<"copy"> | Keyword<"move"> | Keyword<"no-drop"> | Keyword<"not-allowed"> | Keyword<"grab"> | Keyword<"grabbing"> | Keyword<"e-resize"> | Keyword<"n-resize"> | Keyword<"ne-resize"> | Keyword<"nw-resize"> | Keyword<"s-resize"> | Keyword<"se-resize"> | Keyword<"sw-resize"> | Keyword<"w-resize"> | Keyword<"ew-resize"> | Keyword<"ns-resize"> | Keyword<"nesw-resize"> | Keyword<"nwse-resize"> | Keyword<"col-resize"> | Keyword<"row-resize"> | Keyword<"all-scroll"> | Keyword<"zoom-in"> | Keyword<"zoom-out">]>>;
         readonly display: Longhand<Tuple<[outside: Keyword<"block"> | Keyword<"inline"> | Keyword<"run-in">, inside: Keyword<"flow"> | Keyword<"flow-root"> | Keyword<"table"> | Keyword<"flex"> | Keyword<"grid"> | Keyword<"ruby">]> | Tuple<[outside: Keyword<"block"> | Keyword<"inline"> | Keyword<"run-in">, inside: Keyword<"flow"> | Keyword<"flow-root"> | Keyword<"table"> | Keyword<"flex"> | Keyword<"grid"> | Keyword<"ruby">, listitem: Keyword<"list-item">]> | Tuple<[outside: Keyword<"table-row-group"> | Keyword<"table-header-group"> | Keyword<"table-footer-group"> | Keyword<"table-row"> | Keyword<"table-cell"> | Keyword<"table-column-group"> | Keyword<"table-column"> | Keyword<"table-caption"> | Keyword<"ruby-base"> | Keyword<"ruby-text"> | Keyword<"ruby-base-container"> | Keyword<"ruby-text-container">, inside: Keyword<"flow"> | Keyword<"flow-root"> | Keyword<"table"> | Keyword<"flex"> | Keyword<"grid"> | Keyword<"ruby">]> | Tuple<[Keyword<"none"> | Keyword<"contents">]>, Tuple<[outside: Keyword<"block"> | Keyword<"inline"> | Keyword<"run-in">, inside: Keyword<"flow"> | Keyword<"flow-root"> | Keyword<"table"> | Keyword<"flex"> | Keyword<"grid"> | Keyword<"ruby">]> | Tuple<[outside: Keyword<"block"> | Keyword<"inline"> | Keyword<"run-in">, inside: Keyword<"flow"> | Keyword<"flow-root"> | Keyword<"table"> | Keyword<"flex"> | Keyword<"grid"> | Keyword<"ruby">, listitem: Keyword<"list-item">]> | Tuple<[outside: Keyword<"table-row-group"> | Keyword<"table-header-group"> | Keyword<"table-footer-group"> | Keyword<"table-row"> | Keyword<"table-cell"> | Keyword<"table-column-group"> | Keyword<"table-column"> | Keyword<"table-caption"> | Keyword<"ruby-base"> | Keyword<"ruby-text"> | Keyword<"ruby-base-container"> | Keyword<"ruby-text-container">, inside: Keyword<"flow"> | Keyword<"flow-root"> | Keyword<"table"> | Keyword<"flex"> | Keyword<"grid"> | Keyword<"ruby">]> | Tuple<[Keyword<"none"> | Keyword<"contents">]>>;
         readonly "flex-direction": Longhand<Keyword.ToKeywords<"row" | "row-reverse" | "column" | "column-reverse">, Keyword.ToKeywords<"row" | "row-reverse" | "column" | "column-reverse">>;
         readonly "flex-wrap": Longhand<Keyword.ToKeywords<"nowrap" | "wrap" | "wrap-reverse">, Keyword.ToKeywords<"nowrap" | "wrap" | "wrap-reverse">>;
         readonly float: Longhand<Keyword.ToKeywords<"none" | "left" | "right">, Keyword.ToKeywords<"none" | "left" | "right">>;
         readonly "font-family": Longhand<List<String_2 | Keyword<"serif"> | Keyword<"sans-serif"> | Keyword<"cursive"> | Keyword<"fantasy"> | Keyword<"monospace">>, List<String_2 | Keyword<"serif"> | Keyword<"sans-serif"> | Keyword<"cursive"> | Keyword<"fantasy"> | Keyword<"monospace">>>;
         readonly "font-size": Longhand<LengthPercentage | Keyword<"medium"> | Keyword<"xx-small"> | Keyword<"x-small"> | Keyword<"small"> | Keyword<"large"> | Keyword<"x-large"> | Keyword<"xx-large"> | Keyword<"xxx-large"> | Keyword<"larger"> | Keyword<"smaller">, Length>;
-        readonly "font-stretch": Longhand<Specified_10, Percentage.Fixed<Numeric.Type> | Percentage.Calculated<Numeric.Type>>;
+        readonly "font-stretch": Longhand<Specified_10, Percentage.Calculated<Numeric.Type> | Percentage.Fixed<Numeric.Type>>;
         readonly "font-style": Longhand<Keyword.ToKeywords<"normal" | "italic" | "oblique">, Keyword.ToKeywords<"normal" | "italic" | "oblique">>;
         readonly "font-variant-caps": Longhand<Keyword.ToKeywords<"normal" | "small-caps" | "all-small-caps" | "petite-caps" | "all-petite-caps" | "unicase" | "titling-caps">, Keyword.ToKeywords<"normal" | "small-caps" | "all-small-caps" | "petite-caps" | "all-petite-caps" | "unicase" | "titling-caps">>;
         readonly "font-variant-east-asian": Longhand<Specified_11, Specified_11>;
@@ -216,7 +217,7 @@ export namespace Longhands {
         readonly "vertical-align": Longhand<LengthPercentage | (Keyword<"top"> | Keyword<"bottom"> | Keyword<"sub"> | Keyword<"super"> | Keyword<"baseline"> | Keyword<"text-top"> | Keyword<"text-bottom"> | Keyword<"middle">), Length | (Keyword<"top"> | Keyword<"bottom"> | Keyword<"sub"> | Keyword<"super"> | Keyword<"baseline"> | Keyword<"text-top"> | Keyword<"text-bottom"> | Keyword<"middle">)>;
         readonly visibility: Longhand<Keyword.ToKeywords<"hidden" | "collapse" | "visible">, Keyword.ToKeywords<"hidden" | "collapse" | "visible">>;
         readonly "white-space": Longhand<Keyword.ToKeywords<"nowrap" | "normal" | "pre" | "pre-wrap" | "break-spaces" | "pre-line">, Keyword.ToKeywords<"nowrap" | "normal" | "pre" | "pre-wrap" | "break-spaces" | "pre-line">>;
-        readonly width: Longhand<Percentage | Length | Keyword<"auto">, Length | Percentage.Canonical | Keyword<"auto">>;
+        readonly width: Longhand<LengthPercentage | Keyword<"auto">, LengthPercentage | Keyword<"auto">>;
         readonly "word-spacing": Longhand<Length | Keyword<"normal">, Length>;
     };
     // (undocumented)
@@ -420,6 +421,8 @@ export class Value<T = unknown> implements Functor<T>, Applicative<T>, Monad<T>,
     // (undocumented)
     static of<T>(value: T, source?: Option<Declaration>): Value<T>;
     // (undocumented)
+    resolve<T extends Value_2>(this: Value<T>, resolver?: Resolvable.Resolver<T>): Value<Resolvable.Resolved<T>>;
+    // (undocumented)
     some(predicate: Predicate<T, [source: Option<Declaration>]>): boolean;
     // (undocumented)
     get source(): Option<Declaration>;

packages/alfa-css/src/value/image/gradient/linear/corner.ts

@@ -3,6 +3,7 @@ import { Parser } from "@siteimprove/alfa-parser";
 
 import { type Parser as CSSParser, Token } from "../../../../syntax";
 
+import { Resolvable } from "../../../resolvable";
 import { Value } from "../../../value";
 
 import { Position } from "./position";
@@ -12,7 +13,10 @@ const { map, either, pair, option, right } = Parser;
 /**
  * @internal
  */
-export class Corner extends Value<"corner", false> {
+export class Corner
+  extends Value<"corner", false>
+  implements Resolvable<Corner.Canonical, Corner.Resolver>
+{
   public static of(
     vertical: Position.Vertical,
     horizontal: Position.Horizontal,

packages/alfa-css/src/value/image/gradient/linear/side.ts

@@ -3,6 +3,7 @@ import { Parser } from "@siteimprove/alfa-parser";
 
 import { Token } from "../../../../syntax";
 
+import { Resolvable } from "../../../resolvable";
 import { Value } from "../../../value";
 
 import { Position } from "./position";
@@ -12,7 +13,10 @@ const { map, option, right } = Parser;
 /**
  * @internal
  */
-export class Side extends Value<"side", false> {
+export class Side
+  extends Value<"side", false>
+  implements Resolvable<Side.Canonical, Side.Resolver>
+{
   public static of(side: Position.Vertical | Position.Horizontal): Side {
     return new Side(side);
   }

packages/alfa-css/src/value/image/gradient/radial/circle.ts

@@ -5,17 +5,18 @@ import { Parser as CSSParser, Token } from "../../../../syntax";
 
 import { Keyword } from "../../../keyword";
 import { Length } from "../../../numeric";
+import { Resolvable } from "../../../resolvable";
 import { Value } from "../../../value";
 
 /**
  * {@link https://drafts.csswg.org/css-images/#valdef-ending-shape-circle}
  *
  * @internal
  */
-export class Circle<R extends Length = Length> extends Value<
-  "circle",
-  Value.HasCalculation<[R]>
-> {
+export class Circle<R extends Length = Length>
+  extends Value<"circle", Value.HasCalculation<[R]>>
+  implements Resolvable<Circle.Canonical, Circle.Resolver>
+{
   public static of<R extends Length>(radius: R): Circle<R> {
     return new Circle(radius);
   }

packages/alfa-css/src/value/image/gradient/radial/extent.ts

@@ -5,14 +5,18 @@ import { Err, Result } from "@siteimprove/alfa-result";
 import { Parser as CSSParser, Token } from "../../../../syntax";
 
 import { Keyword } from "../../../keyword";
+import { Resolvable } from "../../../resolvable";
 import { Value } from "../../../value";
 
 const { map } = Parser;
 
 /**
  * @internal
  */
-export class Extent extends Value<"extent", false> {
+export class Extent
+  extends Value<"extent", false>
+  implements Resolvable<Extent.Canonical, Extent.Resolver>
+{
   public static of(
     shape: Extent.Shape = Extent.Shape.Circle,
     size: Extent.Size = Extent.Size.FarthestCorner,

packages/alfa-css/src/value/image/image.ts

@@ -3,6 +3,7 @@ import { Parser } from "@siteimprove/alfa-parser";
 import { Selective } from "@siteimprove/alfa-selective";
 
 import type { Parser as CSSParser } from "../../syntax";
+import { PartiallyResolvable, Resolvable } from "../resolvable";
 
 import { Value } from "../value";
 
@@ -16,10 +17,12 @@ const { map, either } = Parser;
  *
  * @public
  */
-export class Image<I extends URL | Gradient = URL | Gradient> extends Value<
-  "image",
-  Value.HasCalculation<[I]>
-> {
+export class Image<I extends URL | Gradient = URL | Gradient>
+  extends Value<"image", Value.HasCalculation<[I]>>
+  implements
+    Resolvable<Image.Canonical, Image.Resolver>,
+    PartiallyResolvable<Image.PartiallyResolved, Image.PartialResolver>
+{
   public static of<I extends URL | Gradient>(image: I): Image<I> {
     return new Image(image);
   }
@@ -39,6 +42,17 @@ export class Image<I extends URL | Gradient = URL | Gradient> extends Value<
     return new Image(this._image.resolve(resolver));
   }
 
+  public partiallyResolve(
+    resolver: Image.PartialResolver,
+  ): Image.PartiallyResolved {
+    return Image.of(
+      Selective.of(this._image)
+        .if(URL.isURL, (url) => url.resolve())
+        .else((gradient) => gradient.partiallyResolve(resolver))
+        .get(),
+    );
+  }
+
   public equals(value: unknown): value is this {
     return value instanceof Image && value._image.equals(this._image);
   }
@@ -77,18 +91,6 @@ export namespace Image {
 
   export type PartialResolver = URL.Resolver & Gradient.PartialResolver;
 
-  export function partiallyResolve(
-    resolver: PartialResolver,
-  ): (value: Image) => PartiallyResolved {
-    return (value) =>
-      Image.of(
-        Selective.of(value.image)
-          .if(URL.isURL, (url) => url.resolve())
-          .else((gradient) => gradient.partiallyResolve(resolver))
-          .get(),
-      );
-  }
-
   export function isImage<I extends URL | Gradient>(
     value: unknown,
   ): value is Image<I> {

packages/alfa-css/src/value/image/url.ts

@@ -2,6 +2,7 @@ import { Hash } from "@siteimprove/alfa-hash";
 import { Parser } from "@siteimprove/alfa-parser";
 
 import { Function, type Parser as CSSParser, Token } from "../../syntax";
+import { Resolvable } from "../resolvable";
 
 import { Value } from "../value";
 
@@ -12,7 +13,7 @@ const { map, either } = Parser;
  *
  * @public
  */
-export class URL extends Value<"url", false> {
+export class URL extends Value<"url", false> implements Resolvable<URL, never> {
   public static of(url: string): URL {
     return new URL(url);
   }

packages/alfa-css/src/value/index.ts

@@ -5,6 +5,7 @@ export * from "./image";
 export * from "./keyword";
 export * from "./numeric";
 export * from "./position";
+export * from "./resolvable";
 export * from "./shadow";
 export * from "./shape";
 export * from "./string";

packages/alfa-css/src/value/numeric/percentage.ts

@@ -52,7 +52,7 @@ export type Percentage<H extends BaseNumeric.Type = BaseNumeric.Type> =
  * @public
  */
 export namespace Percentage {
-  export type Canonical = Fixed;
+  export type Canonical = Fixed<"percentage">;
 
   export type PartiallyResolved<H extends BaseNumeric.Type> = Fixed<H>;
 
@@ -80,13 +80,13 @@ export namespace Percentage {
       return true;
     }
 
-    public resolve(): Canonical;
+    public resolve(): Fixed<H>;
 
     public resolve<T extends Canonicals[H]>(resolver: Resolver<H>): T;
 
     public resolve<T extends Canonicals[H]>(
       resolver?: Resolver<H>,
-    ): Canonical | T {
+    ): Fixed<H> | T {
       const percentage = Fixed.of<H>(
         this._math
           .resolve()

packages/alfa-css/src/value/shape/rectangle.ts

@@ -5,6 +5,7 @@ import { Comma, Function, type Parser as CSSParser, Token } from "../../syntax";
 
 import { Keyword } from "../keyword";
 import { Length } from "../numeric";
+import { Resolvable } from "../resolvable";
 import { Value } from "../value";
 
 import { BasicShape } from "./basic-shape";
@@ -18,8 +19,11 @@ const { either, map, option, separatedList } = Parser;
  * @deprecated Deprecated as of CSS Masking Module Level 1
  */
 export class Rectangle<
-  O extends Length | Rectangle.Auto = Length | Rectangle.Auto,
-> extends BasicShape<"rectangle", Value.HasCalculation<[O, O, O, O]>> {
+    O extends Length | Rectangle.Auto = Length | Rectangle.Auto,
+  >
+  extends BasicShape<"rectangle", Value.HasCalculation<[O, O, O, O]>>
+  implements Resolvable<Rectangle.Canonical, Rectangle.Resolver>
+{
   public static of<O extends Length | Rectangle.Auto = Length | Rectangle.Auto>(
     top: O,
     right: O,