All files / src ClipLoader.tsx

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/** @jsx jsx */
import * as React from "react";
import { keyframes, css, jsx } from "@emotion/core";
import { Keyframes } from "@emotion/serialize";
import onlyUpdateForKeys from "recompose/onlyUpdateForKeys";
 
import { sizeDefaults, sizeKeys } from "./helpers/proptypes";
import { StyleFunction, PrecompiledCss, LoaderSizeProps } from "./interfaces";
 
const clip: Keyframes = keyframes`
  0% {transform: rotate(0deg) scale(1)}
  50% {transform: rotate(180deg) scale(0.8)}
  100% {transform: rotate(360deg) scale(1)}
`;
 
class Loader extends React.PureComponent<LoaderSizeProps> {
  public static defaultProps: LoaderSizeProps = sizeDefaults(35);
 
  public style: StyleFunction = (): PrecompiledCss => {
    const { size, sizeUnit, color } = this.props;
 
    return css`
      background: transparent !important;
      width: ${`${size}${sizeUnit}`};
      height: ${`${size}${sizeUnit}`};
      border-radius: 100%;
      border: 2px solid;
      border-color: ${color};
      border-bottom-color: transparent;
      display: inline-block;
      animation: ${clip} 0.75s 0s infinite linear;
      animation-fill-mode: both;
    `;
  };
 
  public render(): JSX.Element | null {
    const { loading, css } = this.props;
 
    return loading ? <div css={[this.style(), css]} /> : null;
  }
}
 
const Component: React.ComponentClass<LoaderSizeProps> = onlyUpdateForKeys(sizeKeys)(Loader);
Component.defaultProps = Loader.defaultProps;
export default Component;