Fix declaration-block-no-shorthand-property-overrides false negativ…

…es for `font` and `border`

.changeset/silent-flies-float.md

@@ -0,0 +1,5 @@
+---
+"stylelint": minor
+---
+
+Fixed: `declaration-block-no-shorthand-property-overrides` false negatives for `font` and `border`

lib/reference/properties.mjs

@@ -11,6 +11,40 @@ export const acceptCustomIdentsProperties = new Set([
 	'list-style-type',
 ]);
 
+/** @type {import('stylelint').ShorthandToResetToInitialProperty} */
+export const shorthandToResetToInitialProperty = new Map([
+	[
+		'border',
+		new Set([
+			'border-image',
+			'border-image-outset',
+			'border-image-repeat',
+			'border-image-slice',
+			'border-image-source',
+			'border-image-width',
+		]),
+	],
+	[
+		'font',
+		new Set([
+			// prettier-ignore
+			'font-feature-settings',
+			'font-kerning',
+			'font-language-override',
+			'font-optical-sizing',
+			'font-size-adjust',
+			'font-variant-alternates',
+			'font-variant-caps',
+			'font-variant-east-asian',
+			'font-variant-emoji',
+			'font-variant-ligatures',
+			'font-variant-numeric',
+			'font-variant-position',
+			'font-variation-settings',
+		]),
+	],
+]);
+
 /** @type {import('stylelint').LonghandSubPropertiesOfShorthandProperties} */
 export const longhandSubPropertiesOfShorthandProperties = new Map([
 	// Sort alphabetically
@@ -243,6 +277,13 @@ export const longhandSubPropertiesOfShorthandProperties = new Map([
 		new Set([
 			// prettier-ignore
 			'font-style',
+			/**
+			 * reset explicitly: normal | small-caps
+			 * reset implicitly: all-small-caps | petite-caps | all-petite-caps | unicase | titling-caps
+			 * i.e. either way it will be reset
+			 * @todo add font-variant shorthand to longhandSubPropertiesOfShorthandProperties
+			 * {@link https://www.w3.org/TR/css-fonts-4/#font-variant-prop World Wide Web Consortium}
+			 */
 			'font-variant',
 			'font-weight',
 			'font-stretch',

lib/rules/declaration-block-no-shorthand-property-overrides/__tests__/index.mjs

@@ -80,6 +80,22 @@ testRule({
 			endLine: 1,
 			endColumn: 33,
 		},
+		{
+			code: 'a { border-image: url("foo.png"); border: 1px solid black; }',
+			message: messages.rejected('border', 'border-image'),
+			line: 1,
+			column: 35,
+			endLine: 1,
+			endColumn: 41,
+		},
+		{
+			code: 'a { border-image-source: url("foo.png"); border: 1px solid black; }',
+			message: messages.rejected('border', 'border-image-source'),
+			line: 1,
+			column: 42,
+			endLine: 1,
+			endColumn: 48,
+		},
 		{
 			code: 'a { pAdDiNg-lEfT: 10Px; pAdDiNg: 20Px; }',
 			message: messages.rejected('pAdDiNg', 'pAdDiNg-lEfT'),
@@ -161,6 +177,39 @@ testRule({
 			endLine: 1,
 			endColumn: 61,
 		},
+		{
+			code: 'a { font-variant: small-caps; font: sans-serif; }',
+			message: messages.rejected('font', 'font-variant'),
+			description: 'CSS2 explicit reset',
+			line: 1,
+			column: 31,
+			endLine: 1,
+			endColumn: 35,
+		},
+		{
+			code: 'a { font-variant: all-small-caps; font: sans-serif; }',
+			message: messages.rejected('font', 'font-variant'),
+			description: 'CSS3 implicit reset',
+			line: 1,
+			column: 35,
+			endLine: 1,
+			endColumn: 39,
+		},
+		{
+			code: 'a { font-size-adjust: 0.545; font: Verdana; }',
+			message: messages.rejected('font', 'font-size-adjust'),
+			line: 1,
+			column: 30,
+			endLine: 1,
+			endColumn: 34,
+		},
+		{
+			code: 'a { font-variant-caps: small-caps; font-variant: normal; }',
+			message: messages.rejected('font-variant', 'font-variant-caps'),
+			line: 1,
+			endLine: 1,
+			skip: true,
+		},
 	],
 });
 

lib/rules/declaration-block-no-shorthand-property-overrides/index.mjs

@@ -1,10 +1,14 @@
 import eachDeclarationBlock from '../../utils/eachDeclarationBlock.mjs';
-import { longhandSubPropertiesOfShorthandProperties } from '../../reference/properties.mjs';
 import report from '../../utils/report.mjs';
 import ruleMessages from '../../utils/ruleMessages.mjs';
 import validateOptions from '../../utils/validateOptions.mjs';
 import vendor from '../../utils/vendor.mjs';
 
+import {
+	longhandSubPropertiesOfShorthandProperties,
+	shorthandToResetToInitialProperty,
+} from '../../reference/properties.mjs';
+
 const ruleName = 'declaration-block-no-shorthand-property-overrides';
 
 const messages = ruleMessages(ruleName, {
@@ -32,19 +36,21 @@ const rule = (primary) => {
 				const prop = decl.prop;
 				const unprefixedProp = vendor.unprefixed(prop).toLowerCase();
 				const prefix = vendor.prefix(prop).toLowerCase();
-
-				const overrideables = /** @type {Map<string, Set<string>>} */ (
+				const subProperties = /** @type {Map<string, Set<string>>} */ (
 					longhandSubPropertiesOfShorthandProperties
 				).get(unprefixedProp);
+				const resettables = /** @type {Map<string, Set<string>>} */ (
+					shorthandToResetToInitialProperty
+				).get(unprefixedProp);
+				// see microsoft/TypeScript#57228
+				const union = new Set([...(subProperties ?? []), ...(resettables ?? [])]);
 
 				declarations.set(prop.toLowerCase(), prop);
 
-				if (!overrideables) {
-					return;
-				}
+				if (union.size === 0) return;
 
-				for (const longhandProp of overrideables) {
-					const declaration = declarations.get(prefix + longhandProp);
+				for (const property of union) {
+					const declaration = declarations.get(prefix + property);
 
 					if (!declaration) {
 						continue;

types/stylelint/index.d.mts

@@ -40,6 +40,7 @@ export {
 	RuleSeverity,
 	Severity,
 	ShorthandProperties,
+	ShorthandToResetToInitialProperty,
 	StylelintPostcssResult,
 	Utils,
 	Warning,

types/stylelint/index.d.ts

@@ -681,6 +681,10 @@ declare namespace stylelint {
 		| 'text-emphasis'
 		| 'transition';
 
+	type ImplicitResetters = Extract<ShorthandProperties, 'border' | 'flex' | 'font'>;
+	/** @internal */
+	export type ShorthandToResetToInitialProperty = ReadonlyMap<ImplicitResetters, Set<string>>;
+
 	/** @internal */
 	export type LonghandSubPropertiesOfShorthandProperties = ReadonlyMap<
 		ShorthandProperties,