import { common } from '@material-ui/core/colors'; import { makeStyles } from '@material-ui/core/styles'; import { getContrastRatio, darken, } from '@material-ui/core/styles/colorManipulator'; import React from 'react'; import { LabelFragment } from './Label.generated'; import { Color } from './gqlTypes'; // Minimum contrast between the background and the text color const contrastThreshold = 2.5; // Guess the text color based on the background color const getTextColor = (background: string) => getContrastRatio(background, common.white) >= contrastThreshold ? common.white // White on dark backgrounds : common.black; // And black on light ones const _rgb = (color: Color) => 'rgb(' + color.R + ',' + color.G + ',' + color.B + ')'; // Create a style object from the label RGB colors const createStyle = (color: Color) => ({ backgroundColor: _rgb(color), color: getTextColor(_rgb(color)), borderBottomColor: darken(_rgb(color), 0.2), }); const useStyles = makeStyles(theme => ({ label: { ...theme.typography.body1, padding: '1px 6px 0.5px', fontSize: '0.9em', fontWeight: 500, margin: '0.05em 1px calc(-1.5px + 0.05em)', borderRadius: '3px', display: 'inline-block', borderBottom: 'solid 1.5px', verticalAlign: 'bottom', }, })); type Props = { label: LabelFragment }; function Label({ label }: Props) { const classes = useStyles(); return ( {label.name} ); } export default Label;