tesseract/categories/web/freeform/react/src/components/MultilineTextInput/index.tsx

import * as React from 'react';
import { TextControl, tailwind } from '@tesseract-design/web-base';
import { useFallbackId } from '@modal-sh/react-utils';

const { tw } = tailwind;

const MultilineTextInputDerivedElementComponent = 'textarea' as const;

/**
 * Derived HTML element of the {@link MultilineTextInput} component.
 */
export type MultilineTextInputDerivedElement = HTMLElementTagNameMap[
  typeof MultilineTextInputDerivedElementComponent
];

/**
 * Props of the {@link MultilineTextInput} component.
 */
export interface MultilineTextInputProps extends Omit<React.HTMLProps<MultilineTextInputDerivedElement>, 'size' | 'label' | 'inputMode' | 'pattern'> {
  /**
   * Short textual description indicating the nature of the component's value.
   */
  label?: React.ReactNode,
  /**
   * Short textual description as guidelines for valid input values.
   */
  hint?: React.ReactNode,
  /**
   * Size of the component.
   */
  size?: TextControl.Size,
  /**
   * Additional description, usually graphical, indicating the nature of the component's value.
   */
  indicator?: React.ReactNode,
  /**
   * Should the component display a border?
   */
  border?: boolean,
  /**
   * Should the component occupy the whole width of its parent?
   */
  block?: boolean,
  /**
   * Style of the component.
   */
  variant?: TextControl.Variant,
  /**
   * Is the label hidden?
   */
  hiddenLabel?: boolean,
}

/**
 * Component for inputting textual values.
 *
 * This component supports multiline input and adjusts its layout accordingly.
 */
export const MultilineTextInput = React.forwardRef<
  MultilineTextInputDerivedElement,
  MultilineTextInputProps
>((
  {
    label,
    hint,
    indicator,
    size = 'medium' as const,
    border = false,
    block = false,
    variant = 'default' as const,
    hiddenLabel = false,
    className,
    style,
    id: idProp,
    ...etcProps
  }: MultilineTextInputProps,
  forwardedRef,
) => {
  const labelId = React.useId();
  const id = useFallbackId(idProp);

  return (
    <div
      className={tw(
        'relative rounded ring-secondary/50 overflow-hidden group has-[:disabled]:opacity-50',
        'focus-within:ring-4',
        {
          'block': block,
          'inline-block align-middle': !block,
        },
        className,
      )}
      style={style}
      data-testid="base"
    >
      {label && (
        <>
          <label
            data-testid="label"
            id={labelId}
            htmlFor={id}
            className={tw(
              'absolute z-[1] w-full top-0.5 left-0 pointer-events-none pl-1 text-xxs font-bold group-focus-within:text-secondary text-primary leading-none bg-negative select-none',
              {
                'sr-only': hiddenLabel,
              },
              {
                'pr-1': !indicator,
              },
              {
                'pr-10': indicator && size === 'small',
                'pr-12': indicator && size === 'medium',
                'pr-16': indicator && size === 'large',
              },
            )}
          >
            <span className="block w-full whitespace-nowrap h-[1.1em] overflow-hidden text-ellipsis">
              {label}
            </span>
          </label>
          {' '}
        </>
      )}
      <MultilineTextInputDerivedElementComponent
        {...etcProps}
        ref={forwardedRef}
        aria-labelledby={labelId}
        id={id}
        data-testid="input"
        style={{
          height: 0,
        }}
        className={tw(
          'bg-negative rounded-inherit w-full peer block font-inherit',
          'focus:outline-0',
          'disabled:opacity-50 disabled:cursor-not-allowed',
          {
            'resize': !block,
            'resize-y': block,
          },
          {
            'text-xxs': size === 'small',
            'text-xs': size === 'medium',
          },
          {
            'pl-4': variant === 'default',
            'pl-1.5': variant === 'alternate',
          },
          {
            'pt-4': variant === 'alternate' && size === 'small',
            'pt-5': variant === 'alternate' && size === 'medium',
            'pt-8': variant === 'alternate' && size === 'large',
          },
          {
            'py-2.5': variant === 'default' && size === 'small',
            'py-3': variant === 'default' && size === 'medium',
            'py-5': variant === 'default' && size === 'large',
          },
          {
            'pr-4': variant === 'default' && !indicator,
            'pr-1.5': variant === 'alternate' && !indicator,
          },
          {
            'pr-10': indicator && size === 'small',
            'pr-12': indicator && size === 'medium',
            'pr-16': indicator && size === 'large',
          },
          {
            'min-h-10': size === 'small',
            'min-h-12': size === 'medium',
            'min-h-16': size === 'large',
          },
        )}
      />
      {hint && (
        <div
          data-testid="hint"
          className={tw(
            'absolute left-0 px-1 pointer-events-none text-xxs leading-none w-full bg-negative select-none',
            {
              'bottom-0 pl-4 pb-1': variant === 'default',
              'top-0.5': variant === 'alternate',
            },
            {
              'pt-2': variant === 'alternate' && size === 'small',
              'pt-3': variant === 'alternate' && size !== 'small',
            },
            {
              'pr-4': !indicator && variant === 'default',
              'pr-1': !indicator && variant === 'alternate',
            },
            {
              'pr-10': indicator && size === 'small',
              'pr-12': indicator && size === 'medium',
              'pr-16': indicator && size === 'large',
            },
          )}
        >
          <div
            className="opacity-50 whitespace-nowrap w-full h-[1.1em] overflow-hidden text-ellipsis"
          >
            {hint}
          </div>
        </div>
      )}
      {indicator && (
        <div
          data-testid="indicator"
          className={tw(
            'text-center flex items-center justify-center aspect-square absolute bottom-0 right-0 pointer-events-none select-none',
            {
              'w-10': size === 'small',
              'w-12': size === 'medium',
              'w-16': size === 'large',
            },
          )}
        >
          {indicator}
        </div>
      )}
      {border && (
        <span
          data-testid="border"
          className="absolute z-[1] inset-0 rounded-inherit border-2 border-primary pointer-events-none peer-focus:border-secondary"
        />
      )}
    </div>
  );
});

MultilineTextInput.displayName = 'MultilineTextInput';

MultilineTextInput.defaultProps = {
  label: undefined,
  hint: undefined,
  size: 'medium',
  indicator: undefined,
  border: false,
  block: false,
  variant: 'default',
  hiddenLabel: false,
};