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/*
* SonarQube
* Copyright (C) 2009-2024 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
import classNames from 'classnames';
import { throttle, uniqueId } from 'lodash';
import * as React from 'react';
import { createPortal, findDOMNode } from 'react-dom';
import { rawSizes } from '../../app/theme';
import EscKeydownHandler from './EscKeydownHandler';
import FocusOutHandler from './FocusOutHandler';
import ScreenPositionFixer from './ScreenPositionFixer';
import './Tooltip.css';
export type Placement = 'bottom' | 'right' | 'left' | 'top';
export interface TooltipProps {
accessible?: boolean;
classNameSpace?: string;
children: React.ReactElement<{}>;
mouseEnterDelay?: number;
mouseLeaveDelay?: number;
onShow?: () => void;
onHide?: () => void;
overlay: React.ReactNode;
placement?: Placement;
visible?: boolean;
// If tooltip overlay has interactive content (links for instance) we may set this to true to stop
// default behavior of tabbing (other changes should be done outside of this component to make it work)
// See example DocumentationTooltip
isInteractive?: boolean;
}
interface Measurements {
height: number;
left: number;
top: number;
width: number;
}
interface OwnState {
flipped: boolean;
placement?: Placement;
visible: boolean;
}
type State = OwnState & Partial<Measurements>;
const FLIP_MAP: { [key in Placement]: Placement } = {
left: 'right',
right: 'left',
top: 'bottom',
bottom: 'top',
};
function isMeasured(state: State): state is OwnState & Measurements {
return state.height !== undefined;
}
export default function Tooltip(props: TooltipProps) {
// `overlay` is a ReactNode, so it can be `undefined` or `null`. This allows to easily
// render a tooltip conditionally. More generally, we avoid rendering empty tooltips.
return props.overlay != null && props.overlay !== '' ? (
<TooltipInner {...props} />
) : (
props.children
);
}
export class TooltipInner extends React.Component<TooltipProps, State> {
throttledPositionTooltip: () => void;
mouseEnterTimeout?: number;
mouseLeaveTimeout?: number;
tooltipNode?: HTMLElement | null;
mounted = false;
mouseIn = false;
id: string;
static defaultProps = {
mouseEnterDelay: 0.1,
};
constructor(props: TooltipProps) {
super(props);
this.state = {
flipped: false,
placement: props.placement,
visible: props.visible !== undefined ? props.visible : false,
};
this.id = uniqueId('tooltip-');
this.throttledPositionTooltip = throttle(this.positionTooltip, 10);
}
componentDidMount() {
this.mounted = true;
if (this.props.visible === true) {
this.positionTooltip();
this.addEventListeners();
}
}
componentDidUpdate(prevProps: TooltipProps, prevState: State) {
if (this.props.placement !== prevProps.placement) {
this.setState({ placement: this.props.placement });
// Break. This will trigger a new componentDidUpdate() call, so the below
// positionTooltip() call will be correct. Otherwise, it might not use
// the new state.placement value.
return;
}
if (
// opens
(this.props.visible === true && !prevProps.visible) ||
(this.props.visible === undefined &&
this.state.visible === true &&
prevState.visible === false)
) {
this.positionTooltip();
this.addEventListeners();
} else if (
// closes
(!this.props.visible && prevProps.visible === true) ||
(this.props.visible === undefined &&
this.state.visible === false &&
prevState.visible === true)
) {
this.clearPosition();
this.removeEventListeners();
}
}
componentWillUnmount() {
this.mounted = false;
this.removeEventListeners();
this.clearTimeouts();
}
addEventListeners = () => {
window.addEventListener('resize', this.throttledPositionTooltip);
window.addEventListener('scroll', this.throttledPositionTooltip);
};
removeEventListeners = () => {
window.removeEventListener('resize', this.throttledPositionTooltip);
window.removeEventListener('scroll', this.throttledPositionTooltip);
};
clearTimeouts = () => {
window.clearTimeout(this.mouseEnterTimeout);
window.clearTimeout(this.mouseLeaveTimeout);
};
isVisible = () => {
return this.props.visible !== undefined ? this.props.visible : this.state.visible;
};
getPlacement = (): Placement => {
return this.state.placement || 'bottom';
};
tooltipNodeRef = (node: HTMLElement | null) => {
this.tooltipNode = node;
};
adjustArrowPosition = (
placement: Placement,
{ leftFix, topFix }: { leftFix: number; topFix: number }
) => {
switch (placement) {
case 'left':
case 'right':
return { marginTop: -topFix };
default:
return { marginLeft: -leftFix };
}
};
positionTooltip = () => {
// `findDOMNode(this)` will search for the DOM node for the current component.
// First, it will find a React.Fragment (see `render`). It will skip this, and
// it will get the DOM node of the first child, i.e. DOM node of `this.props.children`.
// docs: https://reactjs.org/docs/refs-and-the-dom.html#exposing-dom-refs-to-parent-components
// eslint-disable-next-line react/no-find-dom-node
const toggleNode = findDOMNode(this);
if (toggleNode && toggleNode instanceof Element && this.tooltipNode) {
const toggleRect = toggleNode.getBoundingClientRect();
const tooltipRect = this.tooltipNode.getBoundingClientRect();
const { width, height } = tooltipRect;
let left = 0;
let top = 0;
switch (this.getPlacement()) {
case 'bottom':
left = toggleRect.left + toggleRect.width / 2 - width / 2;
top = toggleRect.top + toggleRect.height;
break;
case 'top':
left = toggleRect.left + toggleRect.width / 2 - width / 2;
top = toggleRect.top - height;
break;
case 'right':
left = toggleRect.left + toggleRect.width;
top = toggleRect.top + toggleRect.height / 2 - height / 2;
break;
case 'left':
left = toggleRect.left - width;
top = toggleRect.top + toggleRect.height / 2 - height / 2;
break;
}
// Save width and height (and later set in `render`) to avoid resizing the tooltip
// element when it's placed close to the window's edge.
this.setState({
left: window.pageXOffset + left,
top: window.pageYOffset + top,
width,
height,
});
}
};
clearPosition = () => {
this.setState({
flipped: false,
left: undefined,
top: undefined,
width: undefined,
height: undefined,
placement: this.props.placement,
});
};
handleMouseEnter = () => {
this.mouseEnterTimeout = window.setTimeout(() => {
// For some reason, even after the `this.mouseEnterTimeout` is cleared, it still
// triggers. To workaround this issue, check that its value is not `undefined`
// (if it's `undefined`, it means the timer has been reset).
if (
this.mounted &&
this.props.visible === undefined &&
this.mouseEnterTimeout !== undefined
) {
this.setState({ visible: true });
}
}, (this.props.mouseEnterDelay || 0) * 1000);
if (this.props.onShow) {
this.props.onShow();
}
};
handleMouseLeave = () => {
if (this.mouseEnterTimeout !== undefined) {
window.clearTimeout(this.mouseEnterTimeout);
this.mouseEnterTimeout = undefined;
}
if (!this.mouseIn) {
this.mouseLeaveTimeout = window.setTimeout(() => {
if (this.mounted && this.props.visible === undefined && !this.mouseIn) {
this.setState({ visible: false });
}
if (this.props.onHide && !this.mouseIn) {
this.props.onHide();
}
}, (this.props.mouseLeaveDelay || 0) * 1000);
}
};
handleFocus = () => {
this.setState({ visible: true });
if (this.props.onShow) {
this.props.onShow();
}
};
handleBlur = () => {
if (!this.props.isInteractive) {
this.closeTooltip();
}
};
closeTooltip = () => {
if (this.mounted) {
this.setState({ visible: false });
if (this.props.onHide) {
this.props.onHide();
}
}
};
handleOverlayMouseEnter = () => {
this.mouseIn = true;
};
handleOverlayMouseLeave = () => {
this.mouseIn = false;
this.handleMouseLeave();
};
needsFlipping = (leftFix: number, topFix: number) => {
// We can live with a tooltip that's slightly positioned over the toggle
// node. Only trigger if it really starts overlapping, as the re-positioning
// is quite expensive, needing 2 re-renders.
const threshold = rawSizes.grid;
switch (this.getPlacement()) {
case 'left':
case 'right':
return Math.abs(leftFix) > threshold;
case 'top':
case 'bottom':
return Math.abs(topFix) > threshold;
}
return false;
};
renderActual = ({ leftFix = 0, topFix = 0 }) => {
if (
!this.state.flipped &&
(leftFix !== 0 || topFix !== 0) &&
this.needsFlipping(leftFix, topFix)
) {
// Update state in a render function... Not a good idea, but we need to
// render in order to know if we need to flip... To prevent React from
// complaining, we update the state using a setTimeout() call.
setTimeout(() => {
this.setState(
({ placement = 'bottom' }) => ({
flipped: true,
// Set height to undefined to force ScreenPositionFixer to
// re-compute our positioning.
height: undefined,
placement: FLIP_MAP[placement],
}),
() => {
if (this.state.visible) {
// Force a re-positioning, as "only" updating the state doesn't
// recompute the position, only re-renders with the previous
// position (which is no longer correct).
this.positionTooltip();
}
}
);
}, 1);
return null;
}
const { classNameSpace = 'tooltip' } = this.props;
const currentPlacement = this.getPlacement();
const style = isMeasured(this.state)
? {
left: this.state.left + leftFix,
top: this.state.top + topFix,
width: this.state.width,
height: this.state.height,
}
: undefined;
return (
<FocusOutHandler
onFocusOut={this.closeTooltip}
className={`${classNameSpace} ${currentPlacement}`}
onPointerEnter={this.handleOverlayMouseEnter}
onPointerLeave={this.handleOverlayMouseLeave}
innerRef={this.tooltipNodeRef}
style={style}
>
{this.renderOverlay()}
<div
className={`${classNameSpace}-arrow`}
style={
isMeasured(this.state)
? this.adjustArrowPosition(currentPlacement, { leftFix, topFix })
: undefined
}
/>
</FocusOutHandler>
);
};
renderOverlay() {
const isVisible = this.isVisible();
const { classNameSpace = 'tooltip', accessible = true } = this.props;
return (
<div
className={classNames(`${classNameSpace}-inner`, { hidden: !isVisible })}
id={this.id}
role="tooltip"
aria-hidden={!accessible || !isVisible}
>
{this.props.overlay}
</div>
);
}
render() {
const isVisible = this.isVisible();
const { accessible = true } = this.props;
return (
<>
{React.cloneElement(this.props.children, {
onPointerEnter: this.handleMouseEnter,
onPointerLeave: this.handleMouseLeave,
onFocus: this.handleFocus,
onBlur: this.handleBlur,
tabIndex: accessible ? 0 : undefined,
// aria-describedby is the semantically correct property to use, but it's not
// always well supported. As a fallback, we use aria-labelledby as well.
// See https://sarahmhigley.com/writing/tooltips-in-wcag-21/
// See https://css-tricks.com/accessible-svgs/
'aria-describedby': accessible ? this.id : undefined,
})}
{!isVisible && this.renderOverlay()}
{isVisible && (
<EscKeydownHandler onKeydown={this.closeTooltip}>
<TooltipPortal>
<ScreenPositionFixer ready={isMeasured(this.state)}>
{this.renderActual}
</ScreenPositionFixer>
</TooltipPortal>
</EscKeydownHandler>
)}
</>
);
}
}
class TooltipPortal extends React.Component {
el: HTMLElement;
constructor(props: {}) {
super(props);
this.el = document.createElement('div');
}
componentDidMount() {
document.body.appendChild(this.el);
}
componentWillUnmount() {
document.body.removeChild(this.el);
}
render() {
return createPortal(this.props.children, this.el);
}
}
|