mirror of https://github.com/trezor/trezor-wallet
Vladimir Volek
6 years ago
parent
160210890f
commit
2788355811
@ -1,165 +0,0 @@
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/* @flow */
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// https://github.com/KyleAMathews/react-headroom/blob/master/src/shouldUpdate.js
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import * as React from 'react';
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import raf from 'raf';
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import { getViewportHeight, getScrollY } from 'utils/windowUtils';
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import styled from 'styled-components';
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import colors from 'config/colors';
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type Props = {
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location: string,
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deviceSelection: boolean,
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children?: React.Node,
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}
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const AsideWrapper = styled.aside`
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position: relative;
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width: 320px;
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min-width: 320px;
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overflow-x: hidden;
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background: ${colors.MAIN};
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border-right: 1px solid ${colors.DIVIDER};
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`;
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const StickyContainerWrapper = styled.div`
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position: relative;
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top: 0;
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width: 320px;
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overflow: hidden;
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`;
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export default class StickyContainer extends React.PureComponent<Props> {
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// Class variables.
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currentScrollY: number = 0;
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lastKnownScrollY: number = 0;
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topOffset: number = 0;
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firstRender: boolean = false;
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framePending: boolean = false;
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stickToBottom: boolean = false;
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top: number = 0;
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aside: ?HTMLElement;
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wrapper: ?HTMLElement;
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subscribers = [];
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// handleResize = (event: Event) => {
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// }
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shouldUpdate = () => {
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const { wrapper, aside }: {wrapper: ?HTMLElement, aside: ?HTMLElement} = this;
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if (!wrapper || !aside) return;
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const bottom: ?HTMLElement = wrapper.querySelector('.sticky-bottom');
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if (!bottom) return;
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const viewportHeight: number = getViewportHeight();
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const bottomBounds = bottom.getBoundingClientRect();
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const asideBounds = aside.getBoundingClientRect();
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const wrapperBounds = wrapper.getBoundingClientRect();
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const scrollDirection = this.currentScrollY >= this.lastKnownScrollY ? 'down' : 'up';
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const distanceScrolled = Math.abs(this.currentScrollY - this.lastKnownScrollY);
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if (asideBounds.top < 0) {
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wrapper.classList.add('fixed');
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let maxTop: number = 1;
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if (wrapperBounds.height > viewportHeight) {
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const bottomOutOfBounds: boolean = (bottomBounds.bottom <= viewportHeight && scrollDirection === 'down');
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const topOutOfBounds: boolean = (wrapperBounds.top > 0 && scrollDirection === 'up');
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if (!bottomOutOfBounds && !topOutOfBounds) {
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this.topOffset += scrollDirection === 'down' ? -distanceScrolled : distanceScrolled;
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}
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maxTop = viewportHeight - wrapperBounds.height;
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}
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if (this.topOffset > 0) this.topOffset = 0;
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if (maxTop < 0 && this.topOffset < maxTop) this.topOffset = maxTop;
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wrapper.style.top = `${this.topOffset}px`;
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} else {
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wrapper.classList.remove('fixed');
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wrapper.style.top = '0px';
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this.topOffset = 0;
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}
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if (wrapperBounds.height > viewportHeight) {
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wrapper.classList.remove('fixed-bottom');
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} else if (wrapper.classList.contains('fixed-bottom')) {
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if (bottomBounds.top < wrapperBounds.bottom - bottomBounds.height) {
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wrapper.classList.remove('fixed-bottom');
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}
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} else if (bottomBounds.bottom < viewportHeight) {
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wrapper.classList.add('fixed-bottom');
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}
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aside.style.minHeight = `${wrapperBounds.height}px`;
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}
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update = () => {
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this.currentScrollY = getScrollY();
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this.shouldUpdate();
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this.framePending = false;
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this.lastKnownScrollY = this.currentScrollY;
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}
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componentDidMount() {
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window.addEventListener('scroll', this.handleScroll);
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window.addEventListener('resize', this.handleScroll);
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raf(this.update);
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}
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componentDidUpdate(prevProps: Props) {
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if (this.props.location !== prevProps.location && this.aside) {
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const asideBounds = this.aside.getBoundingClientRect();
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if (asideBounds.top < 0) {
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window.scrollTo(0, getScrollY() + asideBounds.top);
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this.topOffset = 0;
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}
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raf(this.update);
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} else if (this.props.deviceSelection !== prevProps.deviceSelection) {
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raf(this.update);
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} else if (!this.firstRender) {
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raf(this.update);
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this.firstRender = true;
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}
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}
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componentWillUnmount() {
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window.removeEventListener('scroll', this.handleScroll);
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window.removeEventListener('resize', this.handleScroll);
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}
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handleScroll = (/* event: ?Event */) => {
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if (!this.framePending) {
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this.framePending = true;
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raf(this.update);
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}
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}
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render() {
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return (
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<AsideWrapper
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innerRef={(node) => { this.aside = node; }}
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onScroll={this.handleScroll}
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onTouchStart={this.handleScroll}
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onTouchMove={this.handleScroll}
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onTouchEnd={this.handleScroll}
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>
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<StickyContainerWrapper
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innerRef={(node) => { this.wrapper = node; }}
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>
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{this.props.children}
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</StickyContainerWrapper>
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</AsideWrapper>
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);
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}
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}
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