/
group.tsx
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/
group.tsx
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import * as React from 'react';
import classNames from 'classnames';
import Radio from './radio';
import {
RadioGroupProps,
RadioGroupState,
RadioChangeEvent,
RadioGroupButtonStyle,
} from './interface';
import { ConfigConsumer, ConfigConsumerProps } from '../config-provider';
import SizeContext from '../config-provider/SizeContext';
import { RadioGroupContextProvider } from './context';
function getCheckedValue(children: React.ReactNode) {
let value = null;
let matched = false;
React.Children.forEach(children, (radio: any) => {
if (radio && radio.props && radio.props.checked) {
value = radio.props.value;
matched = true;
}
});
return matched ? { value } : undefined;
}
class RadioGroup extends React.PureComponent<RadioGroupProps, RadioGroupState> {
static defaultProps = {
buttonStyle: 'outline' as RadioGroupButtonStyle,
};
static getDerivedStateFromProps(nextProps: RadioGroupProps, prevState: RadioGroupState) {
const newState: Partial<RadioGroupState> = {
prevPropValue: nextProps.value,
};
if (nextProps.value !== undefined || prevState.prevPropValue !== nextProps.value) {
newState.value = nextProps.value;
} else {
const checkedValue = getCheckedValue(nextProps.children);
if (checkedValue) {
newState.value = checkedValue.value;
}
}
return newState;
}
constructor(props: RadioGroupProps) {
super(props);
let value;
if (props.value !== undefined) {
value = props.value;
} else if (props.defaultValue !== undefined) {
value = props.defaultValue;
} else {
const checkedValue = getCheckedValue(props.children);
value = checkedValue && checkedValue.value;
}
this.state = {
value,
prevPropValue: props.value,
};
}
onRadioChange = (ev: RadioChangeEvent) => {
const lastValue = this.state.value;
const { value } = ev.target;
if (!('value' in this.props)) {
this.setState({
value,
});
}
const { onChange } = this.props;
if (onChange && value !== lastValue) {
onChange(ev);
}
};
renderGroup = ({ getPrefixCls, direction }: ConfigConsumerProps) => {
const { props } = this;
const {
prefixCls: customizePrefixCls,
className = '',
options,
buttonStyle,
size: customizeSize,
} = props;
const prefixCls = getPrefixCls('radio', customizePrefixCls);
const groupPrefixCls = `${prefixCls}-group`;
let { children } = props;
// 如果存在 options, 优先使用
if (options && options.length > 0) {
children = options.map(option => {
if (typeof option === 'string') {
// 此处类型自动推导为 string
return (
<Radio
key={option}
prefixCls={prefixCls}
disabled={this.props.disabled}
value={option}
checked={this.state.value === option}
>
{option}
</Radio>
);
}
// 此处类型自动推导为 { label: string value: string }
return (
<Radio
key={`radio-group-value-options-${option.value}`}
prefixCls={prefixCls}
disabled={option.disabled || this.props.disabled}
value={option.value}
checked={this.state.value === option.value}
style={option.style}
>
{option.label}
</Radio>
);
});
}
return (
<SizeContext.Consumer>
{size => {
const mergedSize = customizeSize || size;
const classString = classNames(
groupPrefixCls,
`${groupPrefixCls}-${buttonStyle}`,
{
[`${groupPrefixCls}-${mergedSize}`]: mergedSize,
[`${groupPrefixCls}-rtl`]: direction === 'rtl',
},
className,
);
return (
<div
className={classString}
style={props.style}
onMouseEnter={props.onMouseEnter}
onMouseLeave={props.onMouseLeave}
id={props.id}
>
{children}
</div>
);
}}
</SizeContext.Consumer>
);
};
render() {
return (
<RadioGroupContextProvider
value={{
onChange: this.onRadioChange,
value: this.state.value,
disabled: this.props.disabled,
name: this.props.name,
}}
>
<ConfigConsumer>{this.renderGroup}</ConfigConsumer>
</RadioGroupContextProvider>
);
}
}
export default RadioGroup;