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359 lines
11 KiB
359 lines
11 KiB
import React from 'react';
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import RcCascader from 'rc-cascader';
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import arrayTreeFilter from 'array-tree-filter';
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import classNames from 'classnames';
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import omit from 'omit.js';
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import Input from '../input';
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import Icon from '../icon';
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export interface CascaderOptionType {
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value: string;
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label: string;
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disabled?: boolean;
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children?: Array<CascaderOptionType>;
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}
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export type CascaderExpandTrigger = 'click' | 'hover'
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export interface ShowSearchType {
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filter?: (inputValue: string, path: CascaderOptionType[]) => boolean;
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render?: (inputValue: string, path: CascaderOptionType[], prefixCls: string) => React.ReactNode;
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sort?: (a: CascaderOptionType[], b: CascaderOptionType[], inputValue: string) => number;
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matchInputWidth?: boolean;
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}
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export interface CascaderProps {
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/** 可选项数据源 */
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options: CascaderOptionType[];
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/** 默认的选中项 */
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defaultValue?: CascaderOptionType[];
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/** 指定选中项 */
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value?: CascaderOptionType[];
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/** 选择完成后的回调 */
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onChange?: (value: string[], selectedOptions?: CascaderOptionType[]) => void;
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/** 选择后展示的渲染函数 */
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displayRender?: (label: string[], selectedOptions?: CascaderOptionType[]) => React.ReactNode;
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/** 自定义样式 */
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style?: React.CSSProperties;
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/** 自定义类名 */
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className?: string;
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/** 自定义浮层类名 */
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popupClassName?: string;
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/** 浮层预设位置：`bottomLeft` `bottomRight` `topLeft` `topRight` */
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popupPlacement?: string;
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/** 输入框占位文本*/
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placeholder?: string;
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/** 输入框大小，可选 `large` `default` `small` */
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size?: string;
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/** 禁用*/
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disabled?: boolean;
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/** 是否支持清除*/
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allowClear?: boolean;
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showSearch?: boolean | ShowSearchType;
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notFoundContent?: React.ReactNode;
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loadData?: (selectedOptions?: CascaderOptionType[]) => void;
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/** 次级菜单的展开方式，可选 'click' 和 'hover' */
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expandTrigger?: CascaderExpandTrigger;
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/** 当此项为 true 时，点选每级菜单选项值都会发生变化 */
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changeOnSelect?: boolean;
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/** 浮层可见变化时回调 */
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onPopupVisibleChange?: (popupVisible: boolean) => void;
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prefixCls?: string;
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inputPrefixCls?: string;
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getPopupContainer?: (triggerNode: Element) => HTMLElement;
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}
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function highlightKeyword(str: string, keyword: string, prefixCls: string) {
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return str.split(keyword)
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.map((node: string, index: number) => index === 0 ? node : [
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<span className={`${prefixCls}-menu-item-keyword`} key="seperator">{keyword}</span>,
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node,
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]);
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}
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function defaultFilterOption(inputValue, path) {
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return path.some(option => option.label.indexOf(inputValue) > -1);
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}
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function defaultRenderFilteredOption(inputValue, path, prefixCls) {
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return path.map(({ label }, index) => {
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const node = label.indexOf(inputValue) > -1 ? highlightKeyword(label, inputValue, prefixCls) : label;
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return index === 0 ? node : [' / ', node];
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});
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}
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function defaultSortFilteredOption(a, b, inputValue) {
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function callback(elem) {
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return elem.label.indexOf(inputValue) > -1;
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}
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return a.findIndex(callback) - b.findIndex(callback);
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}
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const defaultDisplayRender = label => label.join(' / ');
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export default class Cascader extends React.Component<CascaderProps, any> {
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static defaultProps = {
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prefixCls: 'ant-cascader',
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inputPrefixCls: 'ant-input',
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placeholder: 'Please select',
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transitionName: 'slide-up',
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popupPlacement: 'bottomLeft',
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options: [],
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disabled: false,
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allowClear: true,
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notFoundContent: 'Not Found',
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};
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cachedOptions: CascaderOptionType[];
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refs: {
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[key: string]: any;
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input: {
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refs: { input: HTMLElement }
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};
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};
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constructor(props) {
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super(props);
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this.state = {
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value: props.value || props.defaultValue || [],
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inputValue: '',
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inputFocused: false,
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popupVisible: false,
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flattenOptions: props.showSearch && this.flattenTree(props.options, props.changeOnSelect),
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};
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}
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componentWillReceiveProps(nextProps) {
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if ('value' in nextProps) {
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this.setState({ value: nextProps.value || [] });
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}
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if (nextProps.showSearch && this.props.options !== nextProps.options) {
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this.setState({ flattenOptions: this.flattenTree(nextProps.options, nextProps.changeOnSelect) });
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}
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}
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handleChange = (value, selectedOptions) => {
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this.setState({ inputValue: '' });
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if (selectedOptions[0].__IS_FILTERED_OPTION) {
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const unwrappedValue = value[0];
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const unwrappedSelectedOptions = selectedOptions[0].path;
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this.setValue(unwrappedValue, unwrappedSelectedOptions);
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return;
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}
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this.setValue(value, selectedOptions);
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}
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handlePopupVisibleChange = (popupVisible) => {
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this.setState({
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popupVisible,
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inputFocused: popupVisible,
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inputValue: popupVisible ? this.state.inputValue : '',
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});
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const onPopupVisibleChange = this.props.onPopupVisibleChange;
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if (onPopupVisibleChange) {
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onPopupVisibleChange(popupVisible);
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}
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}
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handleInputBlur = () => {
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this.setState({
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inputFocused: false,
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});
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}
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handleInputClick = (e) => {
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const { inputFocused, popupVisible } = this.state;
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// Prevent `Trigger` behaviour.
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if (inputFocused || popupVisible) {
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e.stopPropagation();
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e.nativeEvent.stopImmediatePropagation();
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}
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}
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handleInputChange = (e) => {
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const inputValue = e.target.value;
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this.setState({ inputValue });
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}
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setValue = (value, selectedOptions = []) => {
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if (!('value' in this.props)) {
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this.setState({ value });
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}
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const onChange = this.props.onChange;
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if (onChange) {
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onChange(value, selectedOptions);
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}
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}
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getLabel() {
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const { options, displayRender = defaultDisplayRender as Function } = this.props;
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const value = this.state.value;
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const unwrappedValue = Array.isArray(value[0]) ? value[0] : value;
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const selectedOptions = arrayTreeFilter(options, (o, level) => o.value === unwrappedValue[level]);
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const label = selectedOptions.map(o => o.label);
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return displayRender(label, selectedOptions);
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}
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clearSelection = (e) => {
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e.preventDefault();
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e.stopPropagation();
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if (!this.state.inputValue) {
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this.setValue([]);
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this.setState({ popupVisible: false });
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} else {
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this.setState({ inputValue: '' });
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}
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}
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flattenTree(options, changeOnSelect, ancestor = []) {
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let flattenOptions: any = [];
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options.forEach((option) => {
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const path = ancestor.concat(option);
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if (changeOnSelect || !option.children) {
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flattenOptions.push(path);
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}
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if (option.children) {
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flattenOptions = flattenOptions.concat(this.flattenTree(option.children, changeOnSelect, path));
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}
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});
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return flattenOptions;
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}
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generateFilteredOptions(prefixCls) {
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const { showSearch, notFoundContent } = this.props;
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const {
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filter = defaultFilterOption,
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render = defaultRenderFilteredOption,
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sort = defaultSortFilteredOption,
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} = showSearch as ShowSearchType;
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const { flattenOptions, inputValue } = this.state;
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const filtered = flattenOptions.filter((path) => filter(this.state.inputValue, path))
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.sort((a, b) => sort(a, b, inputValue));
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if (filtered.length > 0) {
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return filtered.map((path) => {
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return {
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__IS_FILTERED_OPTION: true,
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path,
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label: render(inputValue, path, prefixCls),
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value: path.map(o => o.value),
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};
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});
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}
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return [{ label: notFoundContent, value: 'ANT_CASCADER_NOT_FOUND', disabled: true }];
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}
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render() {
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const { props, state } = this;
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const {
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prefixCls, inputPrefixCls, children, placeholder, size, disabled,
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className, style, allowClear, showSearch = false, ...otherProps,
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} = props;
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const value = state.value;
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const sizeCls = classNames({
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[`${inputPrefixCls}-lg`]: size === 'large',
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[`${inputPrefixCls}-sm`]: size === 'small',
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});
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const clearIcon = (allowClear && !disabled && value.length > 0) || state.inputValue ?
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<Icon
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type="cross-circle"
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className={`${prefixCls}-picker-clear`}
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onClick={this.clearSelection}
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/> : null;
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const arrowCls = classNames({
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[`${prefixCls}-picker-arrow`]: true,
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[`${prefixCls}-picker-arrow-expand`]: state.popupVisible,
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});
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const pickerCls = classNames(className, {
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[`${prefixCls}-picker`]: true,
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[`${prefixCls}-picker-with-value`]: state.inputValue,
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[`${prefixCls}-picker-disabled`]: disabled,
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});
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// Fix bug of https://github.com/facebook/react/pull/5004
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// and https://fb.me/react-unknown-prop
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const inputProps = omit(otherProps, [
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'onChange',
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'options',
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'popupPlacement',
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'transitionName',
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'displayRender',
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'onPopupVisibleChange',
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'changeOnSelect',
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'expandTrigger',
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'popupVisible',
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'getPopupContainer',
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'loadData',
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'popupClassName',
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'filterOption',
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'renderFilteredOption',
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'sortFilteredOption',
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'notFoundContent',
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]);
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let options = props.options;
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if (state.inputValue) {
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options = this.generateFilteredOptions(prefixCls);
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}
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// Dropdown menu should keep previous status until it is fully closed.
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if (!state.popupVisible) {
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options = this.cachedOptions;
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} else {
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this.cachedOptions = options;
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}
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const dropdownMenuColumnStyle: { width?: number, height?: string } = {};
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const isNotFound = (options || []).length === 1 && options[0].value === 'ANT_CASCADER_NOT_FOUND';
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if (isNotFound) {
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dropdownMenuColumnStyle.height = 'auto'; // Height of one row.
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}
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// The default value of `matchInputWidth` is `true`
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const resultListMatchInputWidth = (showSearch as ShowSearchType).matchInputWidth === false ? false : true;
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if (resultListMatchInputWidth && state.inputValue && this.refs.input) {
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dropdownMenuColumnStyle.width = this.refs.input.refs.input.offsetWidth;
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}
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const input = children || (
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<span
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style={style}
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className={pickerCls}
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>
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<Input
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{...inputProps}
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ref="input"
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placeholder={value && value.length > 0 ? undefined : placeholder}
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className={`${prefixCls}-input ${sizeCls}`}
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value={state.inputValue}
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disabled={disabled}
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readOnly={!showSearch}
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autoComplete="off"
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onClick={showSearch ? this.handleInputClick : undefined}
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onBlur={showSearch ? this.handleInputBlur : undefined}
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onChange={showSearch ? this.handleInputChange : undefined}
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/>
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<span className={`${prefixCls}-picker-label`}>
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{this.getLabel()}
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</span>
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{clearIcon}
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<Icon type="down" className={arrowCls} />
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</span>
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);
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return (
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<RcCascader
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{...props}
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options={options}
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value={value}
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popupVisible={state.popupVisible}
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onPopupVisibleChange={this.handlePopupVisibleChange}
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onChange={this.handleChange}
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dropdownMenuColumnStyle={dropdownMenuColumnStyle}
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>
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{input}
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</RcCascader>
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);
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}
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}
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