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form_row.tsx
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form_row.tsx
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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
import React, {
cloneElement,
Component,
Children,
HTMLAttributes,
ReactElement,
ReactNode,
} from 'react';
import classNames from 'classnames';
import { ExclusiveUnion, CommonProps, keysOf } from '../../common';
import { get } from '../../../services/objects';
import { EuiFormHelpText } from '../form_help_text';
import { EuiFormErrorText } from '../form_error_text';
import { EuiFormLabel } from '../form_label';
import { htmlIdGenerator } from '../../../services/accessibility';
const displayToClassNameMap = {
row: null,
rowCompressed: 'euiFormRow--compressed',
columnCompressed: 'euiFormRow--compressed euiFormRow--horizontal',
center: null,
centerCompressed: 'euiFormRow--compressed',
columnCompressedSwitch:
'euiFormRow--compressed euiFormRow--horizontal euiFormRow--hasSwitch',
};
export const DISPLAYS = keysOf(displayToClassNameMap);
export type EuiFormRowDisplayKeys = keyof typeof displayToClassNameMap;
interface EuiFormRowState {
isFocused: boolean;
id: string;
}
type EuiFormRowCommonProps = CommonProps & {
/**
* When `rowCompressed`, just tightens up the spacing;
* Set to `columnCompressed` if compressed
* and horizontal layout is needed.
* Set to `center` or `centerCompressed` to align non-input
* content better with inline rows.
* Set to `columnCompressedSwitch` if the form control being passed
* as the child is a switch.
*/
display?: EuiFormRowDisplayKeys;
hasEmptyLabelSpace?: boolean;
fullWidth?: boolean;
/**
* IDs of additional elements that should be part of children's `aria-describedby`
*/
describedByIds?: string[];
/**
* Escape hatch to not render duplicate labels if the child also renders a label
*/
hasChildLabel?: boolean;
/**
* ReactElement to render as this component's content
*/
children: ReactElement;
label?: ReactNode;
/**
* Adds an extra node to the right of the form label without
* being contained inside the form label. Good for things
* like documentation links.
*/
labelAppend?: any;
id?: string;
isInvalid?: boolean;
error?: ReactNode | ReactNode[];
/**
* Adds a single node/string or an array of nodes/strings below the input
*/
helpText?: ReactNode | ReactNode[];
/**
* Passed along to the label element; and to the child field element when `disabled` doesn't already exist on the child field element.
*/
isDisabled?: boolean;
};
type LabelProps = {
labelType?: 'label';
} & EuiFormRowCommonProps &
HTMLAttributes<HTMLDivElement>;
type LegendProps = {
/**
* Defaults to rendering a `<label>` but if passed `'legend'` for labelType,
* will render both a `<legend>` and the surrounding container as a `<fieldset>`
*/
labelType?: 'legend';
} & EuiFormRowCommonProps &
Omit<HTMLAttributes<HTMLFieldSetElement>, 'disabled'>;
export type EuiFormRowProps = ExclusiveUnion<LabelProps, LegendProps>;
export class EuiFormRow extends Component<EuiFormRowProps, EuiFormRowState> {
static defaultProps = {
display: 'row',
hasEmptyLabelSpace: false,
fullWidth: false,
describedByIds: [],
labelType: 'label',
hasChildLabel: true,
};
state: EuiFormRowState = {
isFocused: false,
id: this.props.id || htmlIdGenerator()(),
};
onFocus = (...args: any[]) => {
// Doing this to allow onFocus to be called correctly from the child input element as this component overrides it
const onChildFocus = get(this.props, 'children.props.onFocus');
if (onChildFocus) {
onChildFocus(...args);
}
this.setState(({ isFocused }) => {
if (!isFocused) {
return {
isFocused: true,
};
} else {
return null;
}
});
};
onBlur = (...args: any[]) => {
// Doing this to allow onBlur to be called correctly from the child input element as this component overrides it
const onChildBlur = get(this.props, 'children.props.onBlur');
if (onChildBlur) {
onChildBlur(...args);
}
this.setState({
isFocused: false,
});
};
render() {
const {
children,
helpText,
isInvalid,
error,
label,
labelType,
labelAppend,
hasEmptyLabelSpace,
fullWidth,
className,
describedByIds,
display,
hasChildLabel,
id: propsId,
isDisabled,
...rest
} = this.props;
const { id } = this.state;
const hasLabel = label || labelAppend;
const classes = classNames(
'euiFormRow',
{
'euiFormRow--hasEmptyLabelSpace': hasEmptyLabelSpace,
'euiFormRow--fullWidth': fullWidth,
'euiFormRow--hasLabel': hasLabel,
},
displayToClassNameMap[display!], // Safe use of ! as default prop is 'row'
className
);
let optionalHelpTexts;
if (helpText) {
const helpTexts = Array.isArray(helpText) ? helpText : [helpText];
optionalHelpTexts = helpTexts.map((helpText, i) => {
const key = typeof helpText === 'string' ? helpText : i;
return (
<EuiFormHelpText
key={key}
id={`${id}-help-${i}`}
className="euiFormRow__text"
>
{helpText}
</EuiFormHelpText>
);
});
}
let optionalErrors;
if (error && isInvalid) {
const errorTexts = Array.isArray(error) ? error : [error];
optionalErrors = errorTexts.map((error, i) => {
const key = typeof error === 'string' ? error : i;
return (
<EuiFormErrorText
key={key}
id={`${id}-error-${i}`}
className="euiFormRow__text"
>
{error}
</EuiFormErrorText>
);
});
}
let optionalLabel;
const isLegend = label && labelType === 'legend' ? true : false;
const labelId = `${id}-label`;
if (hasLabel) {
let labelProps = {};
if (isLegend) {
labelProps = {
type: labelType,
};
} else {
labelProps = {
htmlFor: hasChildLabel ? id : undefined,
...(!isDisabled && { isFocused: this.state.isFocused }), // If the row is disabled, don't pass the isFocused state.
type: labelType,
};
}
optionalLabel = (
<div className="euiFormRow__labelWrapper">
<EuiFormLabel
className="euiFormRow__label"
isInvalid={isInvalid}
isDisabled={isDisabled}
aria-invalid={isInvalid}
id={labelId}
{...labelProps}
>
{label}
</EuiFormLabel>
{labelAppend && ' '}
{labelAppend}
</div>
);
}
const optionalProps: React.AriaAttributes = {};
/**
* Safe use of ! as default prop is []
*/
const describingIds = [...describedByIds!];
if (optionalHelpTexts) {
optionalHelpTexts.forEach((optionalHelpText) =>
describingIds.push(optionalHelpText.props.id)
);
}
if (optionalErrors) {
optionalErrors.forEach((error) => describingIds.push(error.props.id));
}
if (describingIds.length > 0) {
optionalProps['aria-describedby'] = describingIds.join(' ');
}
const child = Children.only(children);
const field = cloneElement(child, {
id,
// Allow the child's disabled or isDisabled prop to supercede the `isDisabled`
disabled: child.props.disabled ?? child.props.isDisabled ?? isDisabled,
onFocus: this.onFocus,
onBlur: this.onBlur,
...optionalProps,
});
const fieldWrapperClasses = classNames('euiFormRow__fieldWrapper', {
euiFormRow__fieldWrapperDisplayOnly:
/**
* Safe use of ! as default prop is 'row'
*/
display!.startsWith('center'),
});
const sharedProps = {
className: classes,
id: `${id}-row`,
};
const contents = (
<React.Fragment>
{optionalLabel}
<div className={fieldWrapperClasses}>
{field}
{optionalErrors}
{optionalHelpTexts}
</div>
</React.Fragment>
);
return labelType === 'legend' ? (
<fieldset
{...sharedProps}
{...(rest as HTMLAttributes<HTMLFieldSetElement>)}
>
{contents}
</fieldset>
) : (
<div {...sharedProps} {...(rest as HTMLAttributes<HTMLDivElement>)}>
{contents}
</div>
);
}
}