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link.tsx
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link.tsx
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/*
* 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, {
forwardRef,
AnchorHTMLAttributes,
ButtonHTMLAttributes,
MouseEventHandler,
} from 'react';
import classNames from 'classnames';
import { EuiIcon } from '../icon';
import { EuiI18n, useEuiI18n } from '../i18n';
import { CommonProps, ExclusiveUnion, keysOf } from '../common';
import { getSecureRelForTarget } from '../../services';
import { EuiScreenReaderOnly } from '../accessibility';
import { validateHref } from '../../services/security/href_validator';
export type EuiLinkType = 'button' | 'reset' | 'submit';
export type EuiLinkColor =
| 'primary'
| 'subdued'
| 'secondary'
| 'success'
| 'accent'
| 'danger'
| 'warning'
| 'text'
| 'ghost';
const colorsToClassNameMap: { [color in EuiLinkColor]: string } = {
primary: 'euiLink--primary',
subdued: 'euiLink--subdued',
secondary: 'euiLink--secondary',
success: 'euiLink--success',
accent: 'euiLink--accent',
danger: 'euiLink--danger',
warning: 'euiLink--warning',
ghost: 'euiLink--ghost',
text: 'euiLink--text',
};
export const COLORS = keysOf(colorsToClassNameMap);
export interface LinkButtonProps {
type?: EuiLinkType;
/**
* Any of our named colors.
* **`secondary` color is DEPRECATED, use `success` instead**
*/
color?: EuiLinkColor;
onClick?: MouseEventHandler<HTMLButtonElement>;
}
export interface EuiLinkButtonProps
extends CommonProps,
Omit<ButtonHTMLAttributes<HTMLButtonElement>, 'type' | 'color' | 'onClick'>,
LinkButtonProps {}
export interface LinkAnchorProps {
type?: EuiLinkType;
/**
* Any of our named colors.
* **`secondary` color is DEPRECATED, use `success` instead**
*/
color?: EuiLinkColor;
/**
* Set to true to show an icon indicating that it is an external link;
* Defaults to true if `target="_blank"`
*/
external?: boolean;
}
export interface EuiLinkAnchorProps
extends CommonProps,
Omit<AnchorHTMLAttributes<HTMLAnchorElement>, 'type' | 'color' | 'onClick'>,
LinkAnchorProps {
onClick?: MouseEventHandler<HTMLAnchorElement>;
}
export type EuiLinkProps = ExclusiveUnion<
EuiLinkButtonProps,
EuiLinkAnchorProps
>;
const EuiLink = forwardRef<HTMLAnchorElement | HTMLButtonElement, EuiLinkProps>(
(
{
children,
color = 'primary',
className,
href,
external,
target,
rel,
type = 'button',
onClick,
disabled: _disabled,
...rest
},
ref
) => {
const isHrefValid = !href || validateHref(href);
const disabled = _disabled || !isHrefValid;
const externalLinkIcon = (
<EuiIcon
aria-label={useEuiI18n('euiLink.external.ariaLabel', 'External link')}
size="s"
className="euiLink__externalIcon"
type="popout"
/>
);
const newTargetScreenreaderText = (
<EuiScreenReaderOnly>
<span>
<EuiI18n
token="euiLink.newTarget.screenReaderOnlyText"
default="(opens in a new tab or window)"
/>
</span>
</EuiScreenReaderOnly>
);
if (href === undefined || !isHrefValid) {
const buttonProps = {
className: classNames(
'euiLink',
disabled ? 'euiLink-disabled' : colorsToClassNameMap[color],
className
),
type,
onClick,
disabled,
...rest,
};
return (
<button
ref={ref as React.Ref<HTMLButtonElement>}
{...(buttonProps as EuiLinkButtonProps)}>
{children}
</button>
);
}
const secureRel = getSecureRelForTarget({ href, target, rel });
const anchorProps = {
className: classNames('euiLink', colorsToClassNameMap[color], className),
href,
target,
rel: secureRel,
onClick,
...rest,
};
const showExternalLinkIcon =
(target === '_blank' && external !== false) || external === true;
return (
<a
ref={ref as React.Ref<HTMLAnchorElement>}
{...(anchorProps as EuiLinkAnchorProps)}>
{children}
{showExternalLinkIcon && externalLinkIcon}
{target === '_blank' && newTargetScreenreaderText}
</a>
);
}
);
EuiLink.displayName = 'EuiLink';
export { EuiLink };