/**
 * ty-textarea — form-associated textarea that auto-resizes to its content,
 * within optional min-height/max-height constraints.
 *
 * @fires {CustomEvent<{value: string, originalEvent: Event}>} input - Emitted on input
 * @fires {CustomEvent<{value: string, originalEvent: Event}>} change - Emitted on change
 */
import { TyComponent } from '../base/ty-component.js';
import type { PropertyChange } from '../utils/property-manager.js';
/** For typing TyComponent only — actual state lives in private fields. */
interface TextareaState {
    value: string;
    isFocused: boolean;
    textareaEl: HTMLTextAreaElement | null;
    dummyEl: HTMLPreElement | null;
}
export interface TyTextareaElement extends HTMLElement {
    value?: string;
    name?: string;
    placeholder?: string;
    label?: string;
    disabled?: boolean;
    required?: boolean;
    error?: string;
    size?: 'xs' | 'sm' | 'md' | 'lg' | 'xl';
    rows?: string | number;
    cols?: string | number;
    resize?: 'none' | 'both' | 'horizontal' | 'vertical';
    minHeight?: string;
    maxHeight?: string;
}
export declare class TyTextarea extends TyComponent<TextareaState> implements TyTextareaElement {
    static formAssociated: boolean;
    protected static properties: {
        value: {
            type: "string";
            visual: boolean;
            formValue: boolean;
            emitChange: boolean;
            default: string;
        };
        name: {
            type: "string";
            default: string;
        };
        placeholder: {
            type: "string";
            visual: boolean;
            default: string;
        };
        label: {
            type: "string";
            visual: boolean;
            default: string;
        };
        disabled: {
            type: "boolean";
            visual: boolean;
            default: boolean;
        };
        required: {
            type: "boolean";
            visual: boolean;
            default: boolean;
        };
        error: {
            type: "string";
            visual: boolean;
            default: string;
        };
        size: {
            type: "string";
            visual: boolean;
            default: import("../types/common.js").Size;
            validate: (v: any) => boolean;
            coerce: (v: any) => any;
        };
        rows: {
            type: "string";
            visual: boolean;
            default: string;
            coerce: (v: any) => string;
        };
        cols: {
            type: "string";
            visual: boolean;
            default: string;
            coerce: (v: any) => string;
        };
        resize: {
            type: "string";
            visual: boolean;
            default: string;
            validate: (v: any) => boolean;
            coerce: (v: any) => any;
        };
        minHeight: {
            type: "string";
            visual: boolean;
            default: string;
        };
        maxHeight: {
            type: "string";
            visual: boolean;
            default: string;
        };
    };
    private _textareaEl;
    private _dummyEl;
    private _scrollbar;
    private _isFocused;
    constructor();
    protected onConnect(): void;
    protected onDisconnect(): void;
    /** Called BEFORE render. Visual property changes re-render automatically. */
    protected onPropertiesChanged(changes: PropertyChange[]): void;
    protected getFormValue(): FormDataEntryValue | null;
    get value(): string;
    set value(v: string);
    get name(): string;
    set name(v: string);
    get placeholder(): string;
    set placeholder(v: string);
    get label(): string;
    set label(v: string);
    get disabled(): boolean;
    set disabled(v: boolean);
    get required(): boolean;
    set required(v: boolean);
    get error(): string;
    set error(v: string);
    get size(): 'xs' | 'sm' | 'md' | 'lg' | 'xl';
    set size(v: 'xs' | 'sm' | 'md' | 'lg' | 'xl');
    get rows(): string;
    set rows(v: string | number);
    get cols(): string;
    set cols(v: string | number);
    get resize(): 'none' | 'both' | 'horizontal' | 'vertical';
    set resize(v: 'none' | 'both' | 'horizontal' | 'vertical');
    get minHeight(): string;
    set minHeight(v: string);
    get maxHeight(): string;
    set maxHeight(v: string);
    private getFontStyle;
    private getSpacingStyle;
    /** Hidden dummy element used to measure the content height. */
    private setupDummyElement;
    /** Resize the textarea to the dummy's measured height, within min/max. */
    private resizeTextarea;
    private _setupScrollbar;
    private _destroyScrollbar;
    private emitValueEvents;
    private handleInputEvent;
    private handleFocusEvent;
    private handleBlurEvent;
    private buildClassList;
    private applyHeightConstraints;
    private setupTextareaEvents;
    protected render(): void;
    /** required + empty => valueMissing; otherwise valid. Disabled fields are
     *  barred from constraint validation. */
    private updateValidity;
}
export {};