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select.tsx
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select.tsx
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import React from 'react';
import {
Children,
PureComponent,
isValidElement,
RefObject,
ComponentProps,
} from 'react';
import {
prefixClaName,
classNames,
getBEMElement,
getBEMModifier,
} from 'mo/common/className';
import { cloneReactChildren } from 'mo/react';
import { getAttr } from 'mo/common/dom';
import { IContextView, useContextView } from 'mo/components/contextView';
import { ISelectOptionProps } from './option';
import { Icon } from '../icon';
export interface ISelectProps extends Omit<ComponentProps<'div'>, 'onSelect'> {
value?: string;
style?: React.CSSProperties;
className?: string;
defaultValue?: string;
placeholder?: string;
children?: React.ReactNode;
onSelect?(e: React.MouseEvent, selectedOption?: ISelectOptionProps): void;
}
const initialValue = {
isOpen: false,
option: {
name: '',
value: '',
description: '',
},
};
type IState = {
isOpen: boolean;
option: ISelectOptionProps;
};
export const selectClassName = prefixClaName('select');
const containerClassName = getBEMElement(selectClassName, 'container');
const selectOptionsClassName = getBEMElement(selectClassName, 'options');
const selectDescriptorClassName = getBEMElement(selectClassName, 'descriptor');
export const inputClassName = getBEMElement(selectClassName, 'input');
const selectActiveClassName = getBEMModifier(selectClassName, 'active');
const selectArrowClassName = getBEMElement(selectClassName, 'arrow');
export class Select extends PureComponent<ISelectProps, IState> {
private contextView: IContextView;
public state: IState;
private selectElm: RefObject<HTMLDivElement>;
private selectInput: RefObject<HTMLInputElement>;
constructor(props) {
super(props);
this.contextView = useContextView({
shadowOutline: false,
});
this.state = this.getDefaultState(this.props);
this.selectElm = React.createRef();
this.selectInput = React.createRef();
}
static getDerivedStateFromProps(props, state) {
if (props.value !== state.value) {
return {
option: Select.getSelectOption(props),
};
}
return null;
}
public componentDidMount() {
this.contextView.onHide(() => {
if (this.state.isOpen) {
this.setState({
isOpen: false,
});
}
});
}
public componentWillUnmount() {
this.contextView.dispose();
}
private static getSelectOption(props) {
let defaultSelectedOption: ISelectOptionProps = {};
const defaultValue = props.value || props.defaultValue;
const options = Children.toArray(props.children);
for (const option of options) {
if (isValidElement(option)) {
const optionProps = option.props as ISelectOptionProps;
if (optionProps.value && optionProps.value === defaultValue) {
defaultSelectedOption = {
...optionProps,
name:
optionProps.name ||
(optionProps.children as string),
};
break;
}
}
}
return defaultSelectedOption;
}
private getDefaultState(props) {
return {
...initialValue,
option: { ...Select.getSelectOption(props) },
};
}
public handleOnClickOption = (e: React.MouseEvent) => {
const option = e.target as HTMLDivElement;
const value = getAttr(option, 'data-value');
const name = getAttr(option, 'data-name');
const desc = getAttr(option, 'data-desc');
if (name) {
const optionItem: ISelectOptionProps = {
value: value,
name: name,
description: desc,
};
this.setState(
{
option: optionItem,
},
() => {
this.props.onSelect?.(e, optionItem);
this.contextView.hide();
}
);
}
};
public handleOnHoverOption = (e: React.MouseEvent) => {
const option = e.target as HTMLDivElement;
const desc = getAttr(option, 'data-desc');
const descriptor = this.contextView.view!.querySelector(
'.' + selectDescriptorClassName
);
if (descriptor) {
const content = desc || 'None';
descriptor.innerHTML = content;
descriptor.setAttribute('title', content);
}
};
public handleOnClickSelect = (e: React.MouseEvent) => {
const select = this.selectElm.current;
const { children } = this.props;
if (select) {
const selectRect = select?.getBoundingClientRect();
selectRect.y = selectRect.y + selectRect.height;
this.setState({ isOpen: true });
this.contextView.show(selectRect, () => {
return (
<div
style={{
width: selectRect.width,
}}
className={classNames(
containerClassName,
selectActiveClassName
)}
onMouseOver={this.handleOnHoverOption}
>
<div className={selectOptionsClassName}>
{cloneReactChildren<ISelectOptionProps>(children, {
onClick: this.handleOnClickOption,
})}
</div>
<div className={selectDescriptorClassName}>None</div>
</div>
);
});
}
};
public render() {
const { option, isOpen } = this.state;
const { className, placeholder, onSelect, ...restProps } = this.props;
const selectActive = isOpen ? selectActiveClassName : '';
const claNames = classNames(selectClassName, className, selectActive);
return (
<div ref={this.selectElm} className={claNames} {...restProps}>
<input
onClick={this.handleOnClickSelect}
ref={this.selectInput}
autoComplete="off"
placeholder={placeholder}
className={inputClassName}
value={option.name}
readOnly
/>
<span className={selectArrowClassName}>
<Icon type={'chevron-down'} />
</span>
</div>
);
}
}