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fix(eslint-plugin): [prefer-readonly] refine report locations (#8894)
* [prefer-readonly] Refine report locations * wip * bring stuff to shared code * lint
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import type { TSESLint, TSESTree } from '@typescript-eslint/utils'; | ||
import { | ||
nullThrows, | ||
NullThrowsReasons, | ||
} from '@typescript-eslint/utils/eslint-utils'; | ||
|
||
/** | ||
* Generates report loc suitable for reporting on how a class member is | ||
* declared, rather than how it's implemented. | ||
* | ||
* ```ts | ||
* class A { | ||
* abstract method(): void; | ||
* ~~~~~~~~~~~~~~~ | ||
* | ||
* concreteMethod(): void { | ||
* ~~~~~~~~~~~~~~ | ||
* // code | ||
* } | ||
* | ||
* abstract private property?: string; | ||
* ~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
* | ||
* @decorator override concreteProperty = 'value'; | ||
* ~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
* } | ||
* ``` | ||
*/ | ||
export function getMemberHeadLoc( | ||
sourceCode: Readonly<TSESLint.SourceCode>, | ||
node: | ||
| TSESTree.MethodDefinition | ||
| TSESTree.TSAbstractMethodDefinition | ||
| TSESTree.PropertyDefinition | ||
| TSESTree.TSAbstractPropertyDefinition, | ||
): TSESTree.SourceLocation { | ||
let start: TSESTree.Position; | ||
|
||
if (node.decorators.length === 0) { | ||
start = node.loc.start; | ||
} else { | ||
const lastDecorator = node.decorators[node.decorators.length - 1]; | ||
const nextToken = nullThrows( | ||
sourceCode.getTokenAfter(lastDecorator), | ||
NullThrowsReasons.MissingToken('token', 'last decorator'), | ||
); | ||
start = nextToken.loc.start; | ||
} | ||
|
||
let end: TSESTree.Position; | ||
|
||
if (!node.computed) { | ||
end = node.key.loc.end; | ||
} else { | ||
const closingBracket = nullThrows( | ||
sourceCode.getTokenAfter(node.key, token => token.value === ']'), | ||
NullThrowsReasons.MissingToken(']', node.type), | ||
); | ||
end = closingBracket.loc.end; | ||
} | ||
|
||
return { | ||
start: structuredClone(start), | ||
end: structuredClone(end), | ||
}; | ||
} | ||
|
||
/** | ||
* Generates report loc suitable for reporting on how a parameter property is | ||
* declared. | ||
* | ||
* ```ts | ||
* class A { | ||
* constructor(private property: string = 'value') { | ||
* ~~~~~~~~~~~~~~~~ | ||
* } | ||
* ``` | ||
*/ | ||
export function getParameterPropertyHeadLoc( | ||
sourceCode: Readonly<TSESLint.SourceCode>, | ||
node: TSESTree.TSParameterProperty, | ||
nodeName: string, | ||
): TSESTree.SourceLocation { | ||
// Parameter properties have a weirdly different AST structure | ||
// than other class members. | ||
|
||
let start: TSESTree.Position; | ||
|
||
if (node.decorators.length === 0) { | ||
start = structuredClone(node.loc.start); | ||
} else { | ||
const lastDecorator = node.decorators[node.decorators.length - 1]; | ||
const nextToken = nullThrows( | ||
sourceCode.getTokenAfter(lastDecorator), | ||
NullThrowsReasons.MissingToken('token', 'last decorator'), | ||
); | ||
start = structuredClone(nextToken.loc.start); | ||
} | ||
|
||
const end = sourceCode.getLocFromIndex( | ||
node.parameter.range[0] + nodeName.length, | ||
); | ||
|
||
return { | ||
start, | ||
end, | ||
}; | ||
} |
12 changes: 5 additions & 7 deletions
12
packages/eslint-plugin/tests/docs-eslint-output-snapshots/prefer-readonly.shot
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