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/*
* SonarQube
* Copyright (C) 2009-2021 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
import { throttle } from 'lodash';
import * as React from 'react';
import { findDOMNode } from 'react-dom';
import { Theme, withTheme } from '../theme';
interface Props {
/**
* First time `children` are rendered with `undefined` fixes to measure the offset.
* Second time it renders with the computed fixes.
*/
children: (props: Fixes) => React.ReactNode;
/**
* Use this flag to force re-positioning.
* Use cases:
* - when you need to measure `children` size first
* - when you load content asynchronously
*/
ready?: boolean;
theme: Theme;
}
interface Fixes {
leftFix?: number;
topFix?: number;
}
export class ScreenPositionFixer extends React.Component<Props, Fixes> {
throttledPosition: () => void;
constructor(props: Props) {
super(props);
this.state = {};
this.throttledPosition = throttle(this.position, 50);
}
componentDidMount() {
this.addEventListeners();
this.position();
}
componentDidUpdate(prevProps: Props) {
if (!prevProps.ready && this.props.ready) {
this.position();
} else if (prevProps.ready && !this.props.ready) {
this.reset();
}
}
componentWillUnmount() {
this.removeEventListeners();
}
addEventListeners = () => {
window.addEventListener('resize', this.throttledPosition);
};
removeEventListeners = () => {
window.removeEventListener('resize', this.throttledPosition);
};
reset = () => {
this.setState({ leftFix: undefined, topFix: undefined });
};
position = () => {
const edgeMargin = 0.5 * this.props.theme.rawSizes.grid;
// eslint-disable-next-line react/no-find-dom-node
const node = findDOMNode(this);
if (node && node instanceof Element) {
const { width, height, left, top } = node.getBoundingClientRect();
const { clientHeight, clientWidth } = document.documentElement;
let leftFix = 0;
if (left < edgeMargin) {
leftFix = edgeMargin - left;
} else if (left + width > clientWidth - edgeMargin) {
leftFix = clientWidth - edgeMargin - left - width;
}
let topFix = 0;
if (top < edgeMargin) {
topFix = edgeMargin - top;
} else if (top + height > clientHeight - edgeMargin) {
topFix = clientHeight - edgeMargin - top - height;
}
this.setState({ leftFix, topFix });
}
};
render() {
return this.props.children(this.state);
}
}
export default withTheme(ScreenPositionFixer);
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