Function directiveMetadata

packages/core/src/render3/jit/directive.ts:379–412

(type: Type<any>, metadata: Directive)

 * `Component`).
 */
export function directiveMetadata(type: Type<any>, metadata: Directive): R3DirectiveMetadataFacade {
  // Reflect inputs and outputs.
  const reflect = getReflect();
  const propMetadata = reflect.ownPropMetadata(type);

  return {
    name: type.name,
    // g3-only legacyOptionalChaining: true,
    legacyOptionalChaining: false, // 3p-only
    type: type,
    selector: metadata.selector !== undefined ? metadata.selector : null,
    host: metadata.host || EMPTY_OBJ,
    propMetadata: propMetadata,
    inputs: metadata.inputs || EMPTY_ARRAY,
    outputs: metadata.outputs || EMPTY_ARRAY,
    queries: extractQueriesMetadata(type, propMetadata, isContentQuery),
    lifecycle: {usesOnChanges: reflect.hasLifecycleHook(type, 'ngOnChanges')},
    // Indicate that this directive requires the `ɵɵcontrolCreate` instruction to be generated.
    controlCreate: reflect.hasLifecycleHook(type, 'ɵngControlCreate')
      ? {passThroughInput: null}
      : null,
    typeSourceSpan: null!,
    usesInheritance: !extendsDirectlyFromObject(type),
    exportAs: extractExportAs(metadata.exportAs),
    providers: metadata.providers || null,
    viewQueries: extractQueriesMetadata(type, propMetadata, isViewQuery),
    isStandalone: metadata.standalone === undefined ? true : !!metadata.standalone,
    isSignal: !!metadata.signals,
    hostDirectives:
      metadata.hostDirectives?.map((directive) =>
        typeof directive === 'function' ? {directive} : directive,
      ) || null,
  };
}

/**
 * Adds a directive definition to all parent classes of a type that don't have an Angular decorator.