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popover.tsx
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popover.tsx
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/*
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*/
/*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import React, {
Component,
KeyboardEvent,
CSSProperties,
HTMLAttributes,
ReactNode,
Ref,
RefCallback,
} from 'react';
import classNames from 'classnames';
import tabbable from 'tabbable';
import { CommonProps, NoArgCallback } from '../common';
import { FocusTarget, OuiFocusTrap, OuiFocusTrapProps } from '../focus_trap';
import { ReactFocusOnProps } from 'react-focus-on/dist/es5/types';
import {
cascadingMenuKeys,
getTransitionTimings,
getWaitDuration,
performOnFrame,
htmlIdGenerator,
} from '../../services';
import { OuiScreenReaderOnly } from '../accessibility';
import { OuiPanel, PanelPaddingSize, OuiPanelProps } from '../panel';
import { OuiPortal } from '../portal';
import { OuiMutationObserver } from '../observer/mutation_observer';
import {
findPopoverPosition,
getElementZIndex,
OuiPopoverPosition,
} from '../../services/popover';
import { OuiI18n } from '../i18n';
import { OuiOutsideClickDetector } from '../outside_click_detector';
export type PopoverAnchorPosition =
| 'upCenter'
| 'upLeft'
| 'upRight'
| 'downCenter'
| 'downLeft'
| 'downRight'
| 'leftCenter'
| 'leftUp'
| 'leftDown'
| 'rightCenter'
| 'rightUp'
| 'rightDown';
const generateId = htmlIdGenerator();
export interface OuiPopoverProps {
/**
* Class name passed to the direct parent of the button
*/
anchorClassName?: string;
/**
* Alignment of the popover and arrow relative to the button
*/
anchorPosition?: PopoverAnchorPosition;
/**
* Style and position alteration for arrow-less, left-aligned
* attachment. Intended for use with inputs as anchors, e.g.
* OuiInputPopover
*/
attachToAnchor?: boolean;
/**
* Triggering element for which to align the popover to
*/
button: NonNullable<ReactNode>;
buttonRef?: RefCallback<HTMLDivElement>;
/**
* Callback to handle hiding of the popover
*/
closePopover: NoArgCallback<void>;
/**
* Restrict the popover's position within this element
*/
container?: HTMLElement;
/**
* CSS display type for both the popover and anchor
*/
display?: keyof typeof displayToClassNameMap;
/**
* Object of props passed to OuiFocusTrap
*/
focusTrapProps?: Pick<
OuiFocusTrapProps,
'clickOutsideDisables' | 'noIsolation' | 'scrollLock'
>;
/**
* Show arrow indicating to originating button
*/
hasArrow?: boolean;
/**
* Specifies what element should initially have focus; Can be a DOM
* node, or a selector string (which will be passed to
* document.querySelector() to find the DOM node), or a function that
* returns a DOM node
* Set to `false` to prevent initial auto-focus. Use only
* when your app handles setting initial focus state.
*/
initialFocus?: FocusTarget | false;
/**
* Passed directly to OuiPortal for DOM positioning. Both properties are
* required if prop is specified
*/
insert?: {
sibling: HTMLElement;
position: 'before' | 'after';
};
/**
* Visibility state of the popover
*/
isOpen?: boolean;
/**
* Traps tab focus within the popover contents
*/
ownFocus?: boolean;
/**
* Custom class added to the OuiPanel containing the popover contents
*/
panelClassName?: string;
/**
* OuiPanel padding on all sides
*/
panelPaddingSize?: PanelPaddingSize;
/**
* Standard DOM `style` attribute. Passed to the OuiPanel
*/
panelStyle?: CSSProperties;
/**
* Object of props passed to OuiPanel
*/
panelProps?: Omit<OuiPanelProps, 'style'>;
panelRef?: RefCallback<HTMLElement | null>;
popoverRef?: Ref<HTMLDivElement>;
/**
* When `true`, the popover's position is re-calculated when the user
* scrolls, this supports having fixed-position popover anchors
*/
repositionOnScroll?: boolean;
/**
* By default, popover content inherits the z-index of the anchor
* component; pass `zIndex` to override
*/
zIndex?: number;
/**
* Function callback for when the focus trap is deactivated
*/
onTrapDeactivation?: ReactFocusOnProps['onDeactivation'];
/**
* Distance away from the anchor that the popover will render
*/
offset?: number;
/**
* Minimum distance between the popover and the bounding container;
* Pass an array of 4 values to adjust each side differently: `[top, right, bottom, left]`
* Default is 16
*/
buffer?: number | [number, number, number, number];
/**
* Element to pass as the child element of the arrow;
* Use case is typically limited to an accompanying `OuiBeacon`
*/
arrowChildren?: ReactNode;
/**
* Provide a name to the popover panel
*/
'aria-label'?: string;
/**
* Alternative option to `aria-label` that takes an `id`.
* Usually takes the `id` of the popover title
*/
'aria-labelledby'?: string;
}
type AnchorPosition = 'up' | 'right' | 'down' | 'left';
const anchorPositionToPopoverPositionMap: {
[position in AnchorPosition]: OuiPopoverPosition;
} = {
up: 'top',
right: 'right',
down: 'bottom',
left: 'left',
};
export function getPopoverPositionFromAnchorPosition(
anchorPosition: PopoverAnchorPosition
) {
// maps the anchor position to the matching popover position
// e.g. "upLeft" -> "top", "downRight" -> "bottom"
// extract the first positional word from anchorPosition:
// starts at the beginning (" ^ ") of anchorPosition and
// captures all of the characters (" (.*?) ") until the
// first capital letter (" [A-Z] ") is encountered
const [, primaryPosition] = anchorPosition.match(/^(.*?)[A-Z]/)!;
return anchorPositionToPopoverPositionMap[primaryPosition as AnchorPosition];
}
export function getPopoverAlignFromAnchorPosition(
anchorPosition: PopoverAnchorPosition
) {
// maps the gravity to the matching popover position
// e.g. "upLeft" -> "left", "rightDown" -> "bottom"
// extract the second positional word from anchorPosition:
// starts a capture group at the first capital letter
// and includes everything after it
const [, align] = anchorPosition.match(/([A-Z].*)/)!;
// this performs two tasks:
// 1. normalizes the align position by lowercasing it
// 2. `center` doesn't exist in the lookup map which converts it to `undefined` meaning no align
return anchorPositionToPopoverPositionMap[
align.toLowerCase() as AnchorPosition
];
}
const anchorPositionToClassNameMap = {
upCenter: 'ouiPopover--anchorUpCenter',
upLeft: 'ouiPopover--anchorUpLeft',
upRight: 'ouiPopover--anchorUpRight',
downCenter: 'ouiPopover--anchorDownCenter',
downLeft: 'ouiPopover--anchorDownLeft',
downRight: 'ouiPopover--anchorDownRight',
leftCenter: 'ouiPopover--anchorLeftCenter',
leftUp: 'ouiPopover--anchorLeftUp',
leftDown: 'ouiPopover--anchorLeftDown',
rightCenter: 'ouiPopover--anchorRightCenter',
rightUp: 'ouiPopover--anchorRightUp',
rightDown: 'ouiPopover--anchorRightDown',
};
export const ANCHOR_POSITIONS = Object.keys(anchorPositionToClassNameMap);
const displayToClassNameMap = {
inlineBlock: undefined,
block: 'ouiPopover--displayBlock',
};
export const DISPLAY = Object.keys(displayToClassNameMap);
const DEFAULT_POPOVER_STYLES = {
top: 50,
left: 50,
};
function getElementFromInitialFocus(
initialFocus?: FocusTarget
): HTMLElement | null {
const initialFocusType = typeof initialFocus;
if (initialFocusType === 'string') {
return document.querySelector(initialFocus as string);
}
if (initialFocusType === 'function') {
return (initialFocus as () => HTMLElement | null)();
}
return initialFocus as HTMLElement | null;
}
const returnFocusConfig = { preventScroll: true };
export type Props = CommonProps &
HTMLAttributes<HTMLDivElement> &
OuiPopoverProps;
interface State {
prevProps: {
isOpen?: boolean;
};
suppressingPopover?: boolean;
isClosing: boolean;
isOpening: boolean;
popoverStyles: CSSProperties;
arrowStyles?: CSSProperties;
arrowPosition: any; // What should this be?
openPosition: any; // What should this be?
isOpenStable: boolean;
}
type PropsWithDefaults = Props & {
anchorPosition: PopoverAnchorPosition;
/** CSS display type for both the popover and anchor */
display: keyof typeof displayToClassNameMap;
hasArrow: boolean;
isOpen: boolean;
ownFocus: boolean;
panelPaddingSize: PanelPaddingSize;
};
export class OuiPopover extends Component<Props, State> {
static defaultProps: Partial<PropsWithDefaults> = {
isOpen: false,
ownFocus: true,
anchorPosition: 'downCenter',
panelPaddingSize: 'm',
hasArrow: true,
display: 'inlineBlock',
};
static getDerivedStateFromProps(
nextProps: Props,
prevState: State
): Partial<State> | null {
if (prevState.prevProps.isOpen && !nextProps.isOpen) {
return {
prevProps: {
isOpen: nextProps.isOpen,
},
isClosing: true,
isOpening: false,
};
}
if (prevState.prevProps.isOpen !== nextProps.isOpen) {
return {
prevProps: {
isOpen: nextProps.isOpen,
},
};
}
return null;
}
private respositionTimeout: number | undefined;
private closingTransitionTimeout: number | undefined;
private closingTransitionAnimationFrame: number | undefined;
private updateFocusAnimationFrame: number | undefined;
private button: HTMLElement | null = null;
private panel: HTMLElement | null = null;
private hasSetInitialFocus: boolean = false;
constructor(props: Props) {
super(props);
this.state = {
prevProps: {
isOpen: props.isOpen,
},
suppressingPopover: props.isOpen, // only suppress if created with isOpen=true
isClosing: false,
isOpening: false,
popoverStyles: DEFAULT_POPOVER_STYLES,
arrowStyles: {},
arrowPosition: null,
openPosition: null, // once a stable position has been found, keep the contents on that side
isOpenStable: false, // wait for any initial opening transitions to finish before marking as stable
};
}
closePopover = () => {
if (this.props.isOpen) {
this.props.closePopover();
}
};
onEscapeKey = (event: Event) => {
if (this.props.isOpen) {
event.preventDefault();
event.stopPropagation();
this.closePopover();
}
};
onKeyDown = (event: KeyboardEvent) => {
if (event.key === cascadingMenuKeys.ESCAPE) {
this.onEscapeKey((event as unknown) as Event);
}
};
onClickOutside = (event: Event) => {
// only close the popover if the event source isn't the anchor button
// otherwise, it is up to the anchor to toggle the popover's open status
if (this.button && this.button.contains(event.target as Node) === false) {
this.closePopover();
}
};
updateFocus() {
// Wait for the DOM to update.
this.updateFocusAnimationFrame = window.requestAnimationFrame(() => {
if (
!this.props.ownFocus ||
!this.panel ||
this.props.initialFocus === false
) {
return;
}
// If we've already focused on something inside the panel, everything's fine.
if (
this.hasSetInitialFocus &&
this.panel.contains(document.activeElement)
) {
return;
}
// Otherwise let's focus the first tabbable item and expedite input from the user.
let focusTarget;
if (this.props.initialFocus != null) {
focusTarget = getElementFromInitialFocus(this.props.initialFocus);
} else {
const tabbableItems = tabbable(this.panel);
if (tabbableItems.length) {
focusTarget = tabbableItems[0];
}
}
// there's a race condition between the popover content becoming visible and this function call
// if the element isn't visible yet (due to css styling) then it can't accept focus
// so wait for another render and try again
if (focusTarget == null) {
// there isn't a focus target, one of two reasons:
// #1 is the whole panel hidden? If so, schedule another check
// #2 panel is visible but no tabbables exist, move focus to the panel
const panelVisibility = window.getComputedStyle(this.panel).visibility;
if (panelVisibility === 'hidden') {
// #1
this.updateFocus();
} else {
// #2
focusTarget = this.panel;
}
} else {
// found an element to focus, but is it visible?
const visibility = window.getComputedStyle(focusTarget).visibility;
if (visibility === 'hidden') {
// not visible, check again next render frame
this.updateFocus();
}
}
if (focusTarget != null) {
this.hasSetInitialFocus = true;
focusTarget.focus();
}
});
}
onOpenPopover = () => {
clearTimeout(this.closingTransitionTimeout);
if (this.closingTransitionAnimationFrame) {
cancelAnimationFrame(this.closingTransitionAnimationFrame);
}
// We need to set this state a beat after the render takes place, so that the CSS
// transition can take effect.
this.closingTransitionAnimationFrame = window.requestAnimationFrame(() => {
this.setState({
isOpening: true,
});
});
// for each child element of `this.panel`, find any transition duration we should wait for before stabilizing
const { durationMatch, delayMatch } = Array.prototype.slice
.call(this.panel ? [this.panel, ...Array.from(this.panel.children)] : [])
.reduce(
({ durationMatch, delayMatch }, element) => {
const transitionTimings = getTransitionTimings(element);
return {
durationMatch: Math.max(
durationMatch,
transitionTimings.durationMatch
),
delayMatch: Math.max(delayMatch, transitionTimings.delayMatch),
};
},
{ durationMatch: 0, delayMatch: 0 }
);
clearTimeout(this.respositionTimeout);
this.respositionTimeout = window.setTimeout(() => {
this.setState({ isOpenStable: true }, () => {
this.positionPopoverFixed();
this.updateFocus();
});
}, durationMatch + delayMatch);
};
componentDidMount() {
if (this.state.suppressingPopover) {
// component was created with isOpen=true; now that it's mounted
// stop suppressing and start opening
// eslint-disable-next-line react/no-did-mount-set-state
this.setState({ suppressingPopover: false, isOpening: true }, () => {
this.onOpenPopover();
});
}
if (this.props.repositionOnScroll) {
window.addEventListener('scroll', this.positionPopoverFixed);
}
}
componentDidUpdate(prevProps: Props) {
// The popover is being opened.
if (!prevProps.isOpen && this.props.isOpen) {
this.onOpenPopover();
}
// update scroll listener
if (prevProps.repositionOnScroll !== this.props.repositionOnScroll) {
if (this.props.repositionOnScroll) {
window.addEventListener('scroll', this.positionPopoverFixed);
} else {
window.removeEventListener('scroll', this.positionPopoverFixed);
}
}
// The popover is being closed.
if (prevProps.isOpen && !this.props.isOpen) {
// If the user has just closed the popover, queue up the removal of the content after the
// transition is complete.
this.closingTransitionTimeout = window.setTimeout(() => {
this.hasSetInitialFocus = false;
this.setState({
isClosing: false,
});
}, 250);
}
}
componentWillUnmount() {
window.removeEventListener('scroll', this.positionPopoverFixed);
clearTimeout(this.respositionTimeout);
clearTimeout(this.closingTransitionTimeout);
cancelAnimationFrame(this.closingTransitionAnimationFrame!);
cancelAnimationFrame(this.updateFocusAnimationFrame!);
}
onMutation = (records: MutationRecord[]) => {
const waitDuration = getWaitDuration(records);
this.positionPopoverFixed();
performOnFrame(waitDuration, this.positionPopoverFixed);
};
positionPopover = (allowEnforcePosition: boolean) => {
if (this.button == null || this.panel == null) return;
const { anchorPosition } = this.props as PropsWithDefaults;
let position = getPopoverPositionFromAnchorPosition(anchorPosition);
let forcePosition = undefined;
if (
allowEnforcePosition &&
this.state.isOpenStable &&
this.state.openPosition != null
) {
position = this.state.openPosition;
forcePosition = true;
}
const {
top,
left,
position: foundPosition,
arrow,
anchorBoundingBox,
} = findPopoverPosition({
container: this.props.container,
position,
forcePosition,
align: getPopoverAlignFromAnchorPosition(anchorPosition),
anchor: this.button,
popover: this.panel,
offset:
!this.props.attachToAnchor && this.props.hasArrow
? 16 + (this.props.offset || 0)
: 8 + (this.props.offset || 0),
arrowConfig: {
arrowWidth: 24,
arrowBuffer: 10,
},
returnBoundingBox: this.props.attachToAnchor,
buffer: this.props.buffer,
});
// the popover's z-index must inherit from the button
// this keeps a button's popover under a flyout that would cover the button
// but a popover triggered inside a flyout will appear over that flyout
const { zIndex: zIndexProp } = this.props;
const zIndex =
zIndexProp == null
? getElementZIndex(this.button, this.panel) + 2000
: zIndexProp;
const popoverStyles = {
...this.props.panelStyle,
top,
left:
this.props.attachToAnchor && anchorBoundingBox
? anchorBoundingBox.left
: left,
zIndex,
};
const willRenderArrow = !this.props.attachToAnchor && this.props.hasArrow;
const arrowStyles = willRenderArrow ? arrow : undefined;
const arrowPosition = foundPosition;
this.setState({
popoverStyles,
arrowStyles,
arrowPosition,
openPosition: foundPosition,
});
};
positionPopoverFixed = () => {
this.positionPopover(true);
};
positionPopoverFluid = () => {
this.positionPopover(false);
};
panelRef = (node: HTMLElement | null) => {
this.panel = node;
this.props.panelRef && this.props.panelRef(node);
if (node == null) {
// panel has unmounted, restore the state defaults
this.setState({
popoverStyles: DEFAULT_POPOVER_STYLES,
arrowStyles: {},
arrowPosition: null,
openPosition: null,
isOpenStable: false,
});
window.removeEventListener('resize', this.positionPopoverFluid);
} else {
// panel is coming into existence
this.positionPopoverFluid();
window.addEventListener('resize', this.positionPopoverFluid);
}
};
buttonRef = (node: HTMLDivElement | null) => {
this.button = node;
this.props.buttonRef && this.props.buttonRef(node);
};
render() {
const {
anchorClassName,
anchorPosition,
button,
buttonRef,
insert,
isOpen,
ownFocus,
children,
className,
closePopover,
panelClassName,
panelPaddingSize,
panelProps,
panelRef,
panelStyle,
popoverRef,
hasArrow,
arrowChildren,
repositionOnScroll,
zIndex,
initialFocus,
attachToAnchor,
display,
onTrapDeactivation,
buffer,
'aria-label': ariaLabel,
'aria-labelledby': ariaLabelledBy,
container,
focusTrapProps,
...rest
} = this.props;
const descriptionId = generateId();
const classes = classNames(
'ouiPopover',
anchorPosition ? anchorPositionToClassNameMap[anchorPosition] : null,
display ? displayToClassNameMap[display] : null,
{
'ouiPopover-isOpen': this.state.isOpening,
},
className
);
const anchorClasses = classNames('ouiPopover__anchor', anchorClassName);
const panelClasses = classNames(
'ouiPopover__panel',
`ouiPopover__panel--${this.state.arrowPosition}`,
{ 'ouiPopover__panel-isOpen': this.state.isOpening },
{ 'ouiPopover__panel-noArrow': !hasArrow || attachToAnchor },
{ 'ouiPopover__panel-isAttached': attachToAnchor },
panelClassName,
panelProps?.className
);
let panel;
if (!this.state.suppressingPopover && (isOpen || this.state.isClosing)) {
let tabIndex;
let initialFocus;
let ariaDescribedby;
let ariaLive: HTMLAttributes<any>['aria-live'];
if (ownFocus) {
tabIndex = 0;
ariaLive = 'off';
initialFocus = () => this.panel!;
} else {
ariaLive = 'assertive';
}
let focusTrapScreenReaderText;
if (ownFocus) {
ariaDescribedby = descriptionId;
focusTrapScreenReaderText = (
<OuiScreenReaderOnly>
<p id={descriptionId}>
<OuiI18n
token="ouiPopover.screenReaderAnnouncement"
default="You are in a dialog. To close this dialog, hit escape."
/>
</p>
</OuiScreenReaderOnly>
);
}
const arrowClassNames = classNames(
'ouiPopover__panelArrow',
`ouiPopover__panelArrow--${this.state.arrowPosition}`
);
const returnFocus = this.state.isOpenStable ? returnFocusConfig : false;
panel = (
<OuiPortal insert={insert}>
<OuiFocusTrap
clickOutsideDisables={true}
{...focusTrapProps}
returnFocus={returnFocus} // Ignore temporary state of indecisive focus
initialFocus={initialFocus}
onDeactivation={onTrapDeactivation}
onClickOutside={this.onClickOutside}
onEscapeKey={this.onEscapeKey}
disabled={
!ownFocus || !this.state.isOpenStable || this.state.isClosing
}>
<OuiPanel
{...(panelProps as OuiPanelProps)}
panelRef={this.panelRef}
className={panelClasses}
hasShadow={false}
paddingSize={panelPaddingSize}
tabIndex={tabIndex}
aria-live={ariaLive}
role="dialog"
aria-label={ariaLabel}
aria-labelledby={ariaLabelledBy}
aria-modal="true"
aria-describedby={ariaDescribedby}
style={{
...this.state.popoverStyles,
// Adding `will-change` to reduce risk of a blurry animation in Chrome 86+
willChange: !this.state.isOpenStable
? 'transform, opacity'
: undefined,
}}>
<div className={arrowClassNames} style={this.state.arrowStyles}>
{arrowChildren}
</div>
{focusTrapScreenReaderText}
<OuiMutationObserver
observerOptions={{
attributes: true, // element attribute changes
childList: true, // added/removed elements
characterData: true, // text changes
subtree: true, // watch all child elements
}}
onMutation={this.onMutation}>
{(mutationRef) => <div ref={mutationRef}>{children}</div>}
</OuiMutationObserver>
</OuiPanel>
</OuiFocusTrap>
</OuiPortal>
);
}
// react-focus-on and relataed do not register outside click detection
// when disabled, so we still need to conditionally check for that ourselves
if (ownFocus) {
return (
<div className={classes} ref={popoverRef} {...rest}>
<div className={anchorClasses} ref={this.buttonRef}>
{button instanceof HTMLElement ? null : button}
</div>
{panel}
</div>
);
} else {
return (
<OuiOutsideClickDetector onOutsideClick={this.closePopover}>
<div
className={classes}
ref={popoverRef}
onKeyDown={this.onKeyDown}
{...rest}>
<div className={anchorClasses} ref={this.buttonRef}>
{button instanceof HTMLElement ? null : button}
</div>
{panel}
</div>
</OuiOutsideClickDetector>
);
}
}
}