mirror of
https://github.com/ant-design/ant-design.git
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334 lines
8.4 KiB
TypeScript
334 lines
8.4 KiB
TypeScript
import * as React from 'react';
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import * as ReactDOM from 'react-dom';
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import classNames from 'classnames';
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import addEventListener from 'rc-util/lib/Dom/addEventListener';
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import Affix from '../affix';
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import AnchorLink from './AnchorLink';
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import { ConfigContext, ConfigConsumerProps } from '../config-provider';
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import scrollTo from '../_util/scrollTo';
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import getScroll from '../_util/getScroll';
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import AnchorContext from './context';
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function getDefaultContainer() {
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return window;
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}
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function getOffsetTop(element: HTMLElement, container: AnchorContainer): number {
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if (!element.getClientRects().length) {
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return 0;
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}
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const rect = element.getBoundingClientRect();
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if (rect.width || rect.height) {
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if (container === window) {
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container = element.ownerDocument!.documentElement!;
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return rect.top - container.clientTop;
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}
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return rect.top - (container as HTMLElement).getBoundingClientRect().top;
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}
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return rect.top;
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}
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const sharpMatcherRegx = /#(\S+)$/;
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type Section = {
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link: string;
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top: number;
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};
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export type AnchorContainer = HTMLElement | Window;
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export interface AnchorProps {
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prefixCls?: string;
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className?: string;
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style?: React.CSSProperties;
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children?: React.ReactNode;
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offsetTop?: number;
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bounds?: number;
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affix?: boolean;
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showInkInFixed?: boolean;
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getContainer?: () => AnchorContainer;
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/** Return customize highlight anchor */
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getCurrentAnchor?: () => string;
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onClick?: (
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e: React.MouseEvent<HTMLElement>,
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link: { title: React.ReactNode; href: string },
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) => void;
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/** Scroll to target offset value, if none, it's offsetTop prop value or 0. */
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targetOffset?: number;
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/** Listening event when scrolling change active link */
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onChange?: (currentActiveLink: string) => void;
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}
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export interface AnchorState {
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activeLink: null | string;
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}
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export interface AnchorDefaultProps extends AnchorProps {
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prefixCls: string;
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affix: boolean;
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showInkInFixed: boolean;
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getContainer: () => AnchorContainer;
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}
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export interface AntAnchor {
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registerLink: (link: string) => void;
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unregisterLink: (link: string) => void;
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activeLink: string | null;
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scrollTo: (link: string) => void;
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onClick?: (
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e: React.MouseEvent<HTMLElement>,
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link: { title: React.ReactNode; href: string },
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) => void;
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}
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export default class Anchor extends React.Component<AnchorProps, AnchorState, ConfigConsumerProps> {
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static Link: typeof AnchorLink;
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static defaultProps = {
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affix: true,
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showInkInFixed: false,
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};
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static contextType = ConfigContext;
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state = {
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activeLink: null,
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};
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content: ConfigConsumerProps;
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private inkNode: HTMLSpanElement;
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// scroll scope's container
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private scrollContainer: HTMLElement | Window;
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private links: string[] = [];
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private scrollEvent: any;
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private animating: boolean;
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private prefixCls?: string;
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// Context
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registerLink = (link: string) => {
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if (!this.links.includes(link)) {
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this.links.push(link);
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}
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};
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unregisterLink = (link: string) => {
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const index = this.links.indexOf(link);
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if (index !== -1) {
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this.links.splice(index, 1);
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}
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};
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getContainer = () => {
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const { getTargetContainer } = this.context;
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const { getContainer } = this.props;
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const getFunc = getContainer || getTargetContainer || getDefaultContainer;
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return getFunc();
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};
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componentDidMount() {
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this.scrollContainer = this.getContainer();
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this.scrollEvent = addEventListener(this.scrollContainer, 'scroll', this.handleScroll);
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this.handleScroll();
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}
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componentDidUpdate() {
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if (this.scrollEvent) {
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const currentContainer = this.getContainer();
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if (this.scrollContainer !== currentContainer) {
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this.scrollContainer = currentContainer;
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this.scrollEvent.remove();
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this.scrollEvent = addEventListener(this.scrollContainer, 'scroll', this.handleScroll);
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this.handleScroll();
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}
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}
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this.updateInk();
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}
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componentWillUnmount() {
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if (this.scrollEvent) {
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this.scrollEvent.remove();
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}
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}
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getCurrentAnchor(offsetTop = 0, bounds = 5): string {
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const { getCurrentAnchor } = this.props;
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if (typeof getCurrentAnchor === 'function') {
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return getCurrentAnchor();
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}
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const linkSections: Array<Section> = [];
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const container = this.getContainer();
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this.links.forEach(link => {
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const sharpLinkMatch = sharpMatcherRegx.exec(link.toString());
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if (!sharpLinkMatch) {
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return;
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}
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const target = document.getElementById(sharpLinkMatch[1]);
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if (target) {
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const top = getOffsetTop(target, container);
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if (top < offsetTop + bounds) {
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linkSections.push({
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link,
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top,
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});
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}
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}
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});
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if (linkSections.length) {
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const maxSection = linkSections.reduce((prev, curr) => (curr.top > prev.top ? curr : prev));
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return maxSection.link;
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}
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return '';
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}
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handleScrollTo = (link: string) => {
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const { offsetTop, targetOffset } = this.props;
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this.setCurrentActiveLink(link);
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const container = this.getContainer();
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const scrollTop = getScroll(container, true);
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const sharpLinkMatch = sharpMatcherRegx.exec(link);
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if (!sharpLinkMatch) {
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return;
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}
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const targetElement = document.getElementById(sharpLinkMatch[1]);
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if (!targetElement) {
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return;
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}
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const eleOffsetTop = getOffsetTop(targetElement, container);
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let y = scrollTop + eleOffsetTop;
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y -= targetOffset !== undefined ? targetOffset : offsetTop || 0;
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this.animating = true;
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scrollTo(y, {
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callback: () => {
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this.animating = false;
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},
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getContainer: this.getContainer,
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});
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};
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saveInkNode = (node: HTMLSpanElement) => {
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this.inkNode = node;
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};
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setCurrentActiveLink = (link: string) => {
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const { activeLink } = this.state;
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const { onChange } = this.props;
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if (activeLink !== link) {
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this.setState({
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activeLink: link,
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});
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if (onChange) {
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onChange(link);
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}
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}
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};
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handleScroll = () => {
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if (this.animating) {
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return;
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}
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const { offsetTop, bounds, targetOffset } = this.props;
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const currentActiveLink = this.getCurrentAnchor(
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targetOffset !== undefined ? targetOffset : offsetTop || 0,
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bounds,
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);
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this.setCurrentActiveLink(currentActiveLink);
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};
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updateInk = () => {
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const { prefixCls } = this;
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const anchorNode = ReactDOM.findDOMNode(this) as Element;
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const linkNode = anchorNode.getElementsByClassName(`${prefixCls}-link-title-active`)[0];
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if (linkNode) {
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this.inkNode.style.top = `${(linkNode as any).offsetTop + linkNode.clientHeight / 2 - 4.5}px`;
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}
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};
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render = () => {
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const { getPrefixCls, direction } = this.context;
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const {
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prefixCls: customizePrefixCls,
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className = '',
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style,
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offsetTop,
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affix,
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showInkInFixed,
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children,
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} = this.props;
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const { activeLink } = this.state;
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const prefixCls = getPrefixCls('anchor', customizePrefixCls);
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// To support old version react.
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// Have to add prefixCls on the instance.
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// https://github.com/facebook/react/issues/12397
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this.prefixCls = prefixCls;
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const inkClass = classNames(`${prefixCls}-ink-ball`, {
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visible: activeLink,
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});
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const wrapperClass = classNames(className, `${prefixCls}-wrapper`, {
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[`${prefixCls}-rtl`]: direction === 'rtl',
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});
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const anchorClass = classNames(prefixCls, {
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fixed: !affix && !showInkInFixed,
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});
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const wrapperStyle = {
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maxHeight: offsetTop ? `calc(100vh - ${offsetTop}px)` : '100vh',
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...style,
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};
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const anchorContent = (
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<div className={wrapperClass} style={wrapperStyle}>
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<div className={anchorClass}>
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<div className={`${prefixCls}-ink`}>
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<span className={inkClass} ref={this.saveInkNode} />
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</div>
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{children}
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</div>
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</div>
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);
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return (
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<AnchorContext.Provider
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value={{
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registerLink: this.registerLink,
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unregisterLink: this.unregisterLink,
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activeLink: this.state.activeLink,
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scrollTo: this.handleScrollTo,
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onClick: this.props.onClick,
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}}
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>
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{!affix ? (
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anchorContent
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) : (
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<Affix offsetTop={offsetTop} target={this.getContainer}>
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{anchorContent}
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</Affix>
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)}
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</AnchorContext.Provider>
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);
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};
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}
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