import { AfterViewInit, ChangeDetectorRef, EventEmitter, OnChanges, SimpleChanges } from '@angular/core';
import * as i0 from "@angular/core";
/**
 * A rich text input that supports `@`-mentions inside a `contenteditable` div.
 *
 * ## Data Model
 * - **Input/Output**: `ContentItem[]` (mentions, text, newlines)
 *
 * ## DOM Invariant
 * Every mention `<span data-type="mention" contenteditable="false">` is wrapped
 * by exactly one zero-width-space (ZWS) text node before and after it. ZWS gives
 * the cursor a valid landing spot adjacent to a non-editable element. The
 * invariant is established at render time and re-established by
 * `normalizeMentionPadding()` after any DOM-mutating operation.
 *
 * ## Copy/Paste
 * - **Copy**: `range.cloneContents()` preserves `data-*` attributes (only the
 *   browser's default copy path strips them). We override copy, serialize the
 *   clone ourselves, and strip ZWS from the output.
 * - **Paste**: HTML paths look for `data-type="mention"` spans and rebuild
 *   them; otherwise plaintext fallback.
 */
export declare class MentionsInputComponent implements OnChanges, AfterViewInit {
    private readonly cdr;
    constructor(cdr: ChangeDetectorRef);
    content: MentionsInputComponent.ContentItem[];
    users: MentionsInputComponent.User[];
    readonly: boolean;
    placeholder: string;
    readonly contentChange: EventEmitter<MentionsInputComponent.ContentItem[]>;
    private readonly inputElement?;
    mentionsVisible: boolean;
    mentionSearchText: string;
    mentionAnchor: DOMRect | null;
    selectedUserIndex: number;
    private savedRange;
    ngAfterViewInit(): void;
    ngOnChanges(changes: SimpleChanges): void;
    private renderContent;
    private static contentItemToHtml;
    private static escapeHtml;
    onInput(): void;
    onKeyDown(event: KeyboardEvent): void;
    onPaste(event: ClipboardEvent): void;
    onCopy(event: ClipboardEvent): void;
    onCut(event: ClipboardEvent): void;
    private static isMention;
    private static isZws;
    private resolveAdjacentNode;
    private findMentionAdjacentToCursor;
    private findBrAdjacentToCursor;
    private extendSelectionAcrossMention;
    private placeCursorAdjacentToMention;
    private removeMention;
    private normalizeMentionPadding;
    private handleMentionsDropdownNav;
    private plainTextToNodes;
    private parsePastedHtml;
    private insertNodesAtCursor;
    private insertLineBreak;
    private checkForMentionTrigger;
    private getTextBeforeCursor;
    getFilteredUsers(): MentionsInputComponent.User[];
    onUserHover(index: number): void;
    selectUser(user: MentionsInputComponent.User): void;
    private deleteAtMentionSearch;
    private isInsideMentionSpan;
    private findDomPositionAtCharIndex;
    private closeMentions;
    private emitContentChange;
    private domToContentItems;
    onCalloutClose(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<MentionsInputComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<MentionsInputComponent, "riv-mentions-input", never, { "content": "content"; "users": "users"; "readonly": "readonly"; "placeholder": "placeholder"; }, { "contentChange": "contentChange"; }, never, never, false, never>;
}
export declare namespace MentionsInputComponent {
    const ContentTypes: readonly ["mention", "text", "newline"];
    type ContentType = (typeof MentionsInputComponent.ContentTypes)[number];
    interface User {
        id: number;
        name: string;
    }
    type Content<T extends ContentType> = {
        type: T;
    };
    type UserMention = Content<'mention'> & User;
    type Text = Content<'text'> & {
        text: string;
    };
    type Newline = Content<'newline'>;
    type ContentItem = UserMention | Text | Newline;
    function contentToPlainText(content: ContentItem[]): string;
}