gt - Update Spinner to use SVG vs CSS for shapes

src/components/Spinner.js

@@ -1,21 +1,65 @@
 import PropTypes from 'prop-types';
 import React from 'react';
-import styles from './Spinner.scss';
-import classnames from 'classnames';
-
-// TODO allow spinner color as a prop and/or respect the text-* classes
-// TODO consider SVG for spinner
-const Spinner = props => (
-  <div className={classnames('spinner', styles.spinner, props.className)} style={props.style}>
-    <div></div>
-    <div></div>
-  </div>
+
+function range(size) {
+  const result = [];
+  for (let i = 0; i < size; i++) result.push(i);
+  return result;
+}
+
+// const since these don't behave well as live props, some animation issues:
+const DURATION = '1s';
+const SEGMENTS = 12;
+
+const Spinner = ({ color, size, ...props }) => (
+  <svg
+    width={size}
+    height={size}
+    viewBox="-200 -200 200 200"
+    version="1.1"
+    {...props}
+  >
+    <defs>
+      <path id="shape" d="M20,10 A10,10 0 1 0 20,-10 L-20,-10 A10,10 0 1 0 -20,10" fill={color} />
+    </defs>
+    <style>{`
+      .gears-spinner {
+        animation: gears-spinner-spin ${DURATION} infinite steps(${SEGMENTS});
+      }
+      @keyframes gears-spinner-spin {
+        100% { transform: rotate(360deg); }
+      }
+    `}</style>
+    <g transform="translate(-100,-100)">
+      <g className="gears-spinner">
+        {range(SEGMENTS).map(i => {
+          const opacity = (i / SEGMENTS).toFixed(2);
+          const rotate = i * (360 / SEGMENTS).toFixed(2);
+
+          return (
+            <use
+              key={i}
+              xlinkHref="#shape"
+              transform={`rotate(${rotate}) translate(70, 0)`}
+              opacity={opacity}
+            />
+          );
+        })}
+      </g>
+    </g>
+  </svg>
 );
 
 Spinner.propTypes = {
   className: PropTypes.string,
-  style: PropTypes.object,
-  // TODO add size prop in lieu of style
+  color: PropTypes.string,
+  size: PropTypes.string
+};
+
+Spinner.defaultProps = {
+  color: 'currentColor',
+  size: '1em'
 };
 
 export default Spinner;
+

src/components/Waiting.js

@@ -32,6 +32,7 @@ export default class Waiting extends React.Component {
       ...props
     } = this.props;
 
+    const spinnerClasses = classnames('text-white', styles.spinner);
     return (
       <Modal {...props} className={classnames(styles.waiting, className)} toggle={noop}>
         {title ?
@@ -40,7 +41,7 @@ export default class Waiting extends React.Component {
           </header>
           : null}
         <div className="text-center p-4">
-          {children || <Spinner className={styles.spinner} />}
+          {children || <Spinner className={spinnerClasses} />}
         </div>
       </Modal>
     );

src/components/Waiting.scss

@@ -1,5 +1,3 @@
-@import './Spinner';
-
 .waiting {
   margin: 40vh auto; // TODO flexbox may be better for exact centering
   width: 9rem;
@@ -12,6 +10,5 @@
 
   .spinner {
     font-size: 30px;
-    @include spinner-color(#fff);
   }
 }

stories/Spinner.js

@@ -1,28 +1,31 @@
 import React from 'react';
-import { Spinner } from '../src';
+import { Button, Spinner } from '../src';
 import { storiesOf } from '@storybook/react';
+import { number, select } from '@storybook/addon-knobs';
 
 storiesOf('Spinner', module)
-  .addWithInfo('Default', () => (
-    <div>The <Spinner /> will scale with the font size</div>
-  ))
-  .addWithInfo('Scaled', () => (
-    <div>
-      <Spinner style={{ fontSize: 10 }} />
-      <Spinner style={{ fontSize: 20 }} />
-      <Spinner style={{ fontSize: 40 }} />
-      <Spinner style={{ fontSize: 60 }} />
-      <Spinner style={{ fontSize: 80 }} />
-      <Spinner style={{ fontSize: 100 }} />
-    </div>
-  ))
-  .addWithInfo('This is what it used to look like', () => (
-    <div>
-      <img width="10" src="https://qa.qa.appfolio.com/assets/saffron/blue_spinner-4cde7d33f280e9454273abe82e4674f90959e137f28f2c195b28fb184e9e9ead.gif" />
-      <img width="20" src="https://qa.qa.appfolio.com/assets/saffron/blue_spinner-4cde7d33f280e9454273abe82e4674f90959e137f28f2c195b28fb184e9e9ead.gif" />
-      <img width="40" src="https://qa.qa.appfolio.com/assets/saffron/blue_spinner-4cde7d33f280e9454273abe82e4674f90959e137f28f2c195b28fb184e9e9ead.gif" />
-      <img width="60" src="https://qa.qa.appfolio.com/assets/saffron/blue_spinner-4cde7d33f280e9454273abe82e4674f90959e137f28f2c195b28fb184e9e9ead.gif" />
-      <img width="80" src="https://qa.qa.appfolio.com/assets/saffron/blue_spinner-4cde7d33f280e9454273abe82e4674f90959e137f28f2c195b28fb184e9e9ead.gif" />
-      <img width="100" src="https://qa.qa.appfolio.com/assets/saffron/blue_spinner-4cde7d33f280e9454273abe82e4674f90959e137f28f2c195b28fb184e9e9ead.gif" />
-    </div>
-  ));
+  .addWithInfo('Default', () => {
+    const color = select('color', ['text-primary', 'text-muted', 'text-info', 'text-success', 'text-warning', 'text-danger'], 'text-primary');
+    return (
+      <div>
+        <p style={{ fontSize: `${number('fontSize', 1, { range: true, min: 1, max: 5, step: 0.25 })}rem` }}>
+          The <Spinner /> will scale with the font size of its container,
+        </p>
+
+        <hr />
+        <h3>...and inherit color from it's container:</h3>
+        <p>
+          <Button color="secondary" size="lg" className="mr-3">
+            <Spinner /> Loading
+          </Button>
+          <Button color="primary" outline size="lg">
+            <Spinner /> Loading
+          </Button>
+        </p>
+        <h1 className={color}>
+          {color}: <Spinner className={color} />
+        </h1>
+      </div>
+    );
+  }
+);

test/components/Spinner.spec.js

@@ -7,20 +7,6 @@ import { Spinner } from '../../src';
 describe('<Spinner />', () => {
   it('should render correctly', () => {
     const component = mount(<Spinner />);
-    assert.equal('<div class="spinner"><div></div><div></div></div>', component.html());
-  });
-
-  it('should respect the className prop', () => {
-    const component = mount(<Spinner className="bob" />);
-    assert.equal('<div class="spinner bob"><div></div><div></div></div>', component.html());
-  });
-
-  it('should respect the style prop', () => {
-    const style = { fontSize: 24 };
-    const component = mount(<Spinner style={style} />);
-    assert.equal(
-      '<div class="spinner" style="font-size: 24px;"><div></div><div></div></div>',
-      component.html()
-    );
+    assert(component);
   });
 });