feat(Modal next): Introduce a next composable Modal

packages/react-core/src/next/components/Modal/Modal.tsx

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+import * as React from 'react';
+import * as ReactDOM from 'react-dom';
+import { canUseDOM, KeyTypes, PickOptional } from '../../../helpers';
+import { css } from '@patternfly/react-styles';
+import styles from '@patternfly/react-styles/css/components/Backdrop/backdrop';
+import { ModalContent } from './ModalContent';
+import { OUIAProps, getDefaultOUIAId } from '../../../helpers';
+
+export interface ModalProps extends React.HTMLProps<HTMLDivElement>, OUIAProps {
+  /** The parent container to append the modal to. Defaults to "document.body". */
+  appendTo?: HTMLElement | (() => HTMLElement);
+  /** Id to use for the modal box description. This should match the ModalHeader labelId or descriptorId. */
+  'aria-describedby'?: string;
+  /**   Adds an accessible name to the modal when there is no title in the ModalHeader. */
+  'aria-label'?: string;
+  /** Id to use for the modal box label. This should include the ModalHeader labelId. */
+  'aria-labelledby'?: string;
+  /** Content rendered inside the modal. */
+  children: React.ReactNode;
+  /** Additional classes added to the modal. */
+  className?: string;
+  /** Flag to disable focus trap. */
+  disableFocusTrap?: boolean;
+  /** The element to focus when the modal opens. By default the first
+   * focusable element will receive focus.
+   */
+  elementToFocus?: HTMLElement | SVGElement | string;
+  /** An id to use for the modal box container. */
+  id?: string;
+  /** Flag to show the modal. */
+  isOpen?: boolean;
+  /** Add callback for when the close button is clicked. This prop needs to be passed to render the close button */
+  onClose?: (event: KeyboardEvent | React.MouseEvent) => void;
+  /** Modal handles pressing of the escape key and closes the modal. If you want to handle
+   * this yourself you can use this callback function. */
+  onEscapePress?: (event: KeyboardEvent) => void;
+  /** Position of the modal. By default a modal will be positioned vertically and horizontally centered. */
+  position?: 'default' | 'top';
+  /** Offset from alternate position. Can be any valid CSS length/percentage. */
+  positionOffset?: string;
+  /** Variant of the modal. */
+  variant?: 'small' | 'medium' | 'large' | 'default';
+  /** Default width of the modal. */
+  width?: number | string;
+  /** Maximum width of the modal. */
+  maxWidth?: number | string;
+  /** Value to overwrite the randomly generated data-ouia-component-id.*/
+  ouiaId?: number | string;
+  /** Set the value of data-ouia-safe. Only set to true when the component is in a static state, i.e. no animations are occurring. At all other times, this value must be false. */
+  ouiaSafe?: boolean;
+}
+
+export enum ModalVariant {
+  small = 'small',
+  medium = 'medium',
+  large = 'large',
+  default = 'default'
+}
+
+interface ModalState {
+  container: HTMLElement;
+  ouiaStateId: string;
+}
+
+class Modal extends React.Component<ModalProps, ModalState> {
+  static displayName = 'Modal';
+  static currentId = 0;
+  boxId = '';
+
+  static defaultProps: PickOptional<ModalProps> = {
+    isOpen: false,
+    variant: 'default',
+    appendTo: () => document.body,
+    ouiaSafe: true,
+    position: 'default'
+  };
+
+  constructor(props: ModalProps) {
+    super(props);
+    const boxIdNum = Modal.currentId++;
+    this.boxId = props.id || `pf-modal-part-${boxIdNum}`;
+
+    this.state = {
+      container: undefined,
+      ouiaStateId: getDefaultOUIAId(Modal.displayName, props.variant)
+    };
+  }
+
+  handleEscKeyClick = (event: KeyboardEvent): void => {
+    const { onEscapePress } = this.props;
+    if (event.key === KeyTypes.Escape && this.props.isOpen) {
+      onEscapePress ? onEscapePress(event) : this.props.onClose?.(event);
+    }
+  };
+
+  getElement = (appendTo: HTMLElement | (() => HTMLElement)) => {
+    if (typeof appendTo === 'function') {
+      return appendTo();
+    }
+    return appendTo || document.body;
+  };
+
+  toggleSiblingsFromScreenReaders = (hide: boolean) => {
+    const { appendTo } = this.props;
+    const target: HTMLElement = this.getElement(appendTo);
+    const bodyChildren = target.children;
+    for (const child of Array.from(bodyChildren)) {
+      if (child !== this.state.container) {
+        hide ? child.setAttribute('aria-hidden', '' + hide) : child.removeAttribute('aria-hidden');
+      }
+    }
+  };
+
+  isEmpty = (value: string | null | undefined) => value === null || value === undefined || value === '';
+
+  componentDidMount() {
+    const {
+      appendTo,
+      'aria-describedby': ariaDescribedby,
+      'aria-label': ariaLabel,
+      'aria-labelledby': ariaLabelledby
+    } = this.props;
+    const target: HTMLElement = this.getElement(appendTo);
+    const container = document.createElement('div');
+    this.setState({ container });
+    target.appendChild(container);
+    target.addEventListener('keydown', this.handleEscKeyClick, false);
+
+    if (this.props.isOpen) {
+      target.classList.add(css(styles.backdropOpen));
+    } else {
+      target.classList.remove(css(styles.backdropOpen));
+    }
+
+    if (!ariaDescribedby && !ariaLabel && !ariaLabelledby) {
+      // eslint-disable-next-line no-console
+      console.error('Modal: Specify at least one of: aria-describedby, aria-label, aria-labelledby.');
+    }
+  }
+
+  componentDidUpdate() {
+    const { appendTo } = this.props;
+    const target: HTMLElement = this.getElement(appendTo);
+    if (this.props.isOpen) {
+      target.classList.add(css(styles.backdropOpen));
+      this.toggleSiblingsFromScreenReaders(true);
+    } else {
+      target.classList.remove(css(styles.backdropOpen));
+      this.toggleSiblingsFromScreenReaders(false);
+    }
+  }
+
+  componentWillUnmount() {
+    const { appendTo } = this.props;
+    const target: HTMLElement = this.getElement(appendTo);
+    if (this.state.container) {
+      target.removeChild(this.state.container);
+    }
+    target.removeEventListener('keydown', this.handleEscKeyClick, false);
+    target.classList.remove(css(styles.backdropOpen));
+    this.toggleSiblingsFromScreenReaders(false);
+  }
+
+  render() {
+    const {
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+      appendTo,
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+      onEscapePress,
+      'aria-labelledby': ariaLabelledby,
+      'aria-label': ariaLabel,
+      'aria-describedby': ariaDescribedby,
+      ouiaId,
+      ouiaSafe,
+      position,
+      elementToFocus,
+      ...props
+    } = this.props;
+    const { container } = this.state;
+
+    if (!canUseDOM || !container) {
+      return null;
+    }
+
+    return ReactDOM.createPortal(
+      <ModalContent
+        boxId={this.boxId}
+        aria-label={ariaLabel}
+        aria-describedby={ariaDescribedby}
+        aria-labelledby={ariaLabelledby}
+        ouiaId={ouiaId !== undefined ? ouiaId : this.state.ouiaStateId}
+        ouiaSafe={ouiaSafe}
+        position={position}
+        elementToFocus={elementToFocus}
+        {...props}
+      />,
+      container
+    ) as React.ReactElement;
+  }
+}
+
+export { Modal };

packages/react-core/src/next/components/Modal/ModalBody.tsx

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+import * as React from 'react';
+import { css } from '@patternfly/react-styles';
+import styles from '@patternfly/react-styles/css/components/ModalBox/modal-box';
+
+/** Renders content in the body of the modal */
+
+export interface ModalBodyProps extends React.HTMLProps<HTMLDivElement> {
+  /** Content rendered inside the modal body. */
+  children?: React.ReactNode;
+  /** Additional classes added to the modal body. */
+  className?: string;
+  /** Accessible label applied to the modal body. This should be used to communicate
+   * important information about the modal body div element if needed, such as when it is scrollable.
+   */
+  'aria-label'?: string;
+  /** Accessible role applied to the modal body. This will default to "region" if the
+   * aria-label property is passed in. Set to a more appropriate role as applicable
+   * based on the modal content and context.
+   */
+  role?: string;
+}
+
+export const ModalBody: React.FunctionComponent<ModalBodyProps> = ({
+  children,
+  className,
+  'aria-label': ariaLabel,
+  role,
+  ...props
+}: ModalBodyProps) => {
+  const defaultModalBodyRole = ariaLabel ? 'region' : undefined;
+  return (
+    <div
+      aria-label={ariaLabel}
+      role={role || defaultModalBodyRole}
+      className={css(styles.modalBoxBody, className)}
+      {...props}
+    >
+      {children}
+    </div>
+  );
+};
+ModalBody.displayName = 'ModalBody';

packages/react-core/src/next/components/Modal/ModalBox.tsx

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+import * as React from 'react';
+import { css } from '@patternfly/react-styles';
+import styles from '@patternfly/react-styles/css/components/ModalBox/modal-box';
+import topSpacer from '@patternfly/react-tokens/dist/esm/c_modal_box_m_align_top_spacer';
+
+export interface ModalBoxProps extends React.HTMLProps<HTMLDivElement> {
+  /** Id to use for the modal box description. This should match the ModalHeader labelId or descriptorId */
+  'aria-describedby'?: string;
+  /** Adds an accessible name to the modal when there is no title in the ModalHeader. */
+  'aria-label'?: string;
+  /** Id to use for the modal box label. */
+  'aria-labelledby'?: string;
+  /** Content rendered inside the modal box. */
+  children: React.ReactNode;
+  /** Additional classes added to the modal box. */
+  className?: string;
+  /** Position of the modal. By default a modal will be positioned vertically and horizontally centered. */
+  position?: 'default' | 'top';
+  /** Offset from alternate position. Can be any valid CSS length/percentage. */
+  positionOffset?: string;
+  /** Variant of the modal. */
+  variant?: 'small' | 'medium' | 'large' | 'default';
+}
+
+export const ModalBox: React.FunctionComponent<ModalBoxProps> = ({
+  children,
+  className,
+  variant = 'default',
+  position,
+  positionOffset,
+  'aria-labelledby': ariaLabelledby,
+  'aria-label': ariaLabel,
+  'aria-describedby': ariaDescribedby,
+  style,
+  ...props
+}: ModalBoxProps) => {
+  if (positionOffset) {
+    style = style || {};
+    (style as any)[topSpacer.name] = positionOffset;
+  }
+  return (
+    <div
+      role="dialog"
+      aria-label={ariaLabel || null}
+      aria-labelledby={ariaLabelledby || null}
+      aria-describedby={ariaDescribedby}
+      aria-modal="true"
+      className={css(
+        styles.modalBox,
+        className,
+        position === 'top' && styles.modifiers.alignTop,
+        variant === 'large' && styles.modifiers.lg,
+        variant === 'small' && styles.modifiers.sm,
+        variant === 'medium' && styles.modifiers.md
+      )}
+      style={style}
+      {...props}
+    >
+      {children}
+    </div>
+  );
+};
+ModalBox.displayName = 'ModalBox';

packages/react-core/src/next/components/Modal/ModalBoxCloseButton.tsx

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+import * as React from 'react';
+import { css } from '@patternfly/react-styles';
+import styles from '@patternfly/react-styles/css/components/ModalBox/modal-box';
+import { Button } from '../../../components/Button';
+import TimesIcon from '@patternfly/react-icons/dist/esm/icons/times-icon';
+import { OUIAProps } from '../../../helpers';
+
+export interface ModalBoxCloseButtonProps extends OUIAProps {
+  /** Additional classes added to the close button. */
+  className?: string;
+  /** A callback for when the close button is clicked. */
+  onClose?: (event: KeyboardEvent | React.MouseEvent) => void;
+  /** Accessible descriptor of the close button. */
+  'aria-label'?: string;
+  /** Value to set the data-ouia-component-id.*/
+  ouiaId?: number | string;
+}
+
+export const ModalBoxCloseButton: React.FunctionComponent<ModalBoxCloseButtonProps> = ({
+  className,
+  onClose,
+  'aria-label': ariaLabel = 'Close',
+  ouiaId,
+  ...props
+}: ModalBoxCloseButtonProps) => (
+  <div className={css(styles.modalBoxClose, className)}>
+    <Button
+      variant="plain"
+      onClick={(event) => onClose(event)}
+      aria-label={ariaLabel}
+      {...(ouiaId && { ouiaId: `${ouiaId}-${ModalBoxCloseButton.displayName}` })}
+      {...props}
+    >
+      <TimesIcon />
+    </Button>
+  </div>
+);
+ModalBoxCloseButton.displayName = 'ModalBoxCloseButton';

packages/react-core/src/next/components/Modal/ModalBoxDescription.tsx

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+import * as React from 'react';
+import { css } from '@patternfly/react-styles';
+import styles from '@patternfly/react-styles/css/components/ModalBox/modal-box';
+
+export interface ModalBoxDescriptionProps {
+  /** Content rendered inside the description. */
+  children?: React.ReactNode;
+  /** Additional classes added to the description. */
+  className?: string;
+  /** Id of the description. */
+  id?: string;
+}
+
+export const ModalBoxDescription: React.FunctionComponent<ModalBoxDescriptionProps> = ({
+  children = null,
+  className = '',
+  id = '',
+  ...props
+}: ModalBoxDescriptionProps) => (
+  <div {...props} id={id} className={css(styles.modalBoxDescription, className)}>
+    {children}
+  </div>
+);
+ModalBoxDescription.displayName = 'ModalBoxDescription';