node_modules/@angular/cdk/collections/view-repeater.d.ts

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { InjectionToken, IterableChangeRecord, IterableChanges, TemplateRef, ViewContainerRef } from '@angular/core';
/**
 * The context for an embedded view in the repeater's view container.
 *
 * @template T The type for the embedded view's $implicit property.
 */
export interface _ViewRepeaterItemContext<T> {
    $implicit?: T;
}
/**
 * The arguments needed to construct an embedded view for an item in a view
 * container.
 *
 * @template C The type for the context passed to each embedded view.
 */
export interface _ViewRepeaterItemInsertArgs<C> {
    templateRef: TemplateRef<C>;
    context?: C;
    index?: number;
}
/**
 * A factory that derives the embedded view context for an item in a view
 * container.
 *
 * @template T The type for the embedded view's $implicit property.
 * @template R The type for the item in each IterableDiffer change record.
 * @template C The type for the context passed to each embedded view.
 */
export declare type _ViewRepeaterItemContextFactory<T, R, C extends _ViewRepeaterItemContext<T>> = (record: IterableChangeRecord<R>, adjustedPreviousIndex: number | null, currentIndex: number | null) => _ViewRepeaterItemInsertArgs<C>;
/**
 * Extracts the value of an item from an {@link IterableChangeRecord}.
 *
 * @template T The type for the embedded view's $implicit property.
 * @template R The type for the item in each IterableDiffer change record.
 */
export declare type _ViewRepeaterItemValueResolver<T, R> = (record: IterableChangeRecord<R>) => T;
/** Indicates how a view was changed by a {@link _ViewRepeater}. */
export declare const enum _ViewRepeaterOperation {
    /** The content of an existing view was replaced with another item. */
    REPLACED = 0,
    /** A new view was created with `createEmbeddedView`. */
    INSERTED = 1,
    /** The position of a view changed, but the content remains the same. */
    MOVED = 2,
    /** A view was detached from the view container. */
    REMOVED = 3
}
/**
 * Meta data describing the state of a view after it was updated by a
 * {@link _ViewRepeater}.
 *
 * @template R The type for the item in each IterableDiffer change record.
 * @template C The type for the context passed to each embedded view.
 */
export interface _ViewRepeaterItemChange<R, C> {
    /** The view's context after it was changed. */
    context?: C;
    /** Indicates how the view was changed. */
    operation: _ViewRepeaterOperation;
    /** The view's corresponding change record. */
    record: IterableChangeRecord<R>;
}
/**
 * Type for a callback to be executed after a view has changed.
 *
 * @template R The type for the item in each IterableDiffer change record.
 * @template C The type for the context passed to each embedded view.
 */
export declare type _ViewRepeaterItemChanged<R, C> = (change: _ViewRepeaterItemChange<R, C>) => void;
/**
 * Describes a strategy for rendering items in a {@link ViewContainerRef}.
 *
 * @template T The type for the embedded view's $implicit property.
 * @template R The type for the item in each IterableDiffer change record.
 * @template C The type for the context passed to each embedded view.
 */
export interface _ViewRepeater<T, R, C extends _ViewRepeaterItemContext<T>> {
    applyChanges(changes: IterableChanges<R>, viewContainerRef: ViewContainerRef, itemContextFactory: _ViewRepeaterItemContextFactory<T, R, C>, itemValueResolver: _ViewRepeaterItemValueResolver<T, R>, itemViewChanged?: _ViewRepeaterItemChanged<R, C>): void;
    detach(): void;
}
/**
 * Injection token for {@link _ViewRepeater}. This token is for use by Angular Material only.
 * @docs-private
 */
export declare const _VIEW_REPEATER_STRATEGY: InjectionToken<_ViewRepeater<unknown, unknown, _ViewRepeaterItemContext<unknown>>>;