Add card graphics

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## [`master`](https://github.com/elastic/eui/tree/master)
 
+- Added `bottomGraphic` prop to `EuiCard` for Kibana home page ([#1338](https://github.com/elastic/eui/pull/1338))
+
 **Bug fixes**
 
 - Fixed bug in exporting `CommonProps` in TypeScript definitions ([#1341](https://github.com/elastic/eui/pull/1341))

src/components/card/_card.scss

@@ -4,6 +4,7 @@
 
 $euiCardSpacing: map-get($euiPanelPaddingModifiers, 'paddingMedium');
 $euiCardTitleSize: 18px; // Hardcoded pixel value for theme parity.
+$euiCardGraphicHeight: 40px; // Actual height of the svg used in EuiCardGraphic
 
 // Start with a base of EuiPanel styles
 @include euiPanel($selector: 'euiCard');
@@ -60,6 +61,11 @@ $euiCardTitleSize: 18px; // Hardcoded pixel value for theme parity.
       }
     }
   }
+
+  &.euiCard--hasBottomGraphic {
+    position: relative;
+    padding-bottom: $euiCardSpacing + $euiCardGraphicHeight;
+  }
 }
 
 .euiCard__top {
@@ -144,3 +150,15 @@ $euiCardTitleSize: 18px; // Hardcoded pixel value for theme parity.
     margin-right: $euiSize;
   }
 }
+
+// Optional decorative graphics
+.euiCard__graphic {
+  position: absolute;
+  bottom: 0;
+  left: 0;
+  height: $euiCardGraphicHeight;
+  width: 100%;
+  overflow: hidden;
+  border-bottom-left-radius: $euiBorderRadius;
+  border-bottom-right-radius: $euiBorderRadius;
+}

src/components/card/card.js

@@ -54,6 +54,7 @@ export const EuiCard = ({
   betaBadgeTooltipContent,
   betaBadgeTitle,
   layout,
+  bottomGraphic,
   ...rest,
 }) => {
   const classes = classNames(
@@ -64,6 +65,7 @@ export const EuiCard = ({
       'euiCard--isClickable': onClick || href || isClickable,
       'euiCard--hasBetaBadge': betaBadgeLabel,
       'euiCard--hasIcon': icon,
+      'euiCard--hasBottomGraphic': bottomGraphic,
     },
     className,
   );
@@ -124,6 +126,15 @@ export const EuiCard = ({
     );
   }
 
+  let optionalBottomGraphic;
+  if (bottomGraphic) {
+    optionalBottomGraphic = (
+      <span className="euiCard__graphic">
+        {bottomGraphic}
+      </span>
+    );
+  }
+
   return (
     <OuterElement
       onClick={onClick}
@@ -152,6 +163,8 @@ export const EuiCard = ({
           {footer}
         </span>
       }
+
+      {optionalBottomGraphic}
     </OuterElement>
   );
 };
@@ -209,6 +222,12 @@ EuiCard.propTypes = {
    * Optional title will be supplied as tooltip title or title attribute otherwise the label will be used
    */
   betaBadgeTitle: PropTypes.string,
+
+  /**
+   * Add a decorative bottom graphic to the card.
+   * This should be used sparingly, consult the Kibana Design team before use.
+   */
+  bottomGraphic: PropTypes.node,
 };
 
 EuiCard.defaultProps = {

src/components/card/card_graphic.js

@@ -0,0 +1,51 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+
+const graphicColorsToCodes = [
+  { color: 'blue', start: '#0079A5', end: '#3185FC', path: 'M3.79856147e-10,22.9906998 C127.450324,22.9906998 159.656579,4 213.348797,4 C267.041016,4 288.265625,13.4882812 700,17.0470661 L700,40 L108.569037,40 L0,40 L3.79856147e-10,22.9906998 Z', pathLight: 'M1.35371469e-08,7.95601173 C127.450324,7.95601173 102.647209,17.9667644 174.198268,17.9667644 C245.749327,17.9667644 298.768469,2.23349117e-13 700,1.42108547e-14 L700,37 C700,38.6568542 358.656854,40 357,40 L108.569037,40 L3,40 C1.34314575,40 -3.74826549e-09,38.6568543 -4.14273948e-09,37 L1.35371469e-08,7.95601173 Z' }, // eslint-disable-line  max-len
+  { color: 'green', start: '#017F75', end: '#00B3A4', path: 'M3.14689825e-06,13.6239758 C26.8316503,17.6239758 55.6152344,25 116.542969,25 C177.470703,25 263.972656,4 297.017578,4 C330.0625,4 348.589288,7.23392617 700.000003,9 L700.000003,40 L108.56904,40 L3.14689058e-06,40 L3.14689825e-06,13.6239758 Z', pathLight: 'M3.1372994e-06,24.4746094 C127.450326,24.4746094 108.698941,3 180.25,3 C251.801058,3 298.76847,17.4941406 700,17.4941406 L700.000003,40 L108.569039,39.5058594 L3.01365718,39.9862837 C1.35682009,39.9938246 0.00757513054,38.6568059 3.42096185e-05,36.9999688 C1.34947659e-05,36.9954175 3.13729938e-06,36.9908661 3.13729938e-06,36.9863147 L3.1372994e-06,24.4746094 Z' }, // eslint-disable-line  max-len
+  { color: 'purple', start: '#490092', end: '#DD0A73', path: 'M0,5 C85.1894531,9 157.96592,25.9853066 223.281971,25.9853638 C288.598022,25.9854211 306.490234,12.5448566 700,12.5448566 L700,40 L108.569037,40 L0,40 L0,5 Z', pathLight: 'M700,21.4746094 L700,40 L1.76214598e-12,40 L1.12746648e-08,18.4941406 C9.35694419,18.5359805 41.1418261,21.0181774 102.519531,21.4746094 C163.897236,21.9310414 216.210205,5 260.105102,5 C304,5 339.77443,21.6752984 700,21.4746094 Z' }, // eslint-disable-line  max-len
+];
+
+export const GRAPHIC_COLORS = graphicColorsToCodes.map(({ color }) => color);
+
+export const EuiCardGraphic = ({
+  color,
+}) => {
+  // Set the svg gradient colors
+  const graphicStartColor = graphicColorsToCodes.find(w => w.color === color).start;
+  const graphicEndColor = graphicColorsToCodes.find(x => x.color === color).end;
+  const graphicSVGPath = graphicColorsToCodes.find(y => y.color === color).path;
+  const graphicSVGPathLight = graphicColorsToCodes.find(z => z.color === color).pathLight;
+
+  return (
+    <svg xmlns="http://www.w3.org/2000/svg" width="100%" height="40" viewBox="0 0 300 40" preserveAspectRatio="none">
+      <defs>
+        <linearGradient id={`wave-${color}`} x1="0%" y1="50%" y2="50%">
+          <stop offset="0%" stopColor={graphicStartColor} />
+          <stop offset="40%" stopColor={graphicEndColor} />
+        </linearGradient>
+      </defs>
+      <g fill="none" fillRule="evenodd">
+        <path fill="#C4C4C4" fillOpacity=".13" fillRule="evenodd" d={graphicSVGPathLight}/>
+        <path
+          fill={`url(#wave-${color})`}
+          fillOpacity=".83"
+          fillRule="evenodd"
+          d={graphicSVGPath}
+        />
+      </g>
+    </svg>
+  );
+};
+
+EuiCardGraphic.propTypes = {
+  /**
+   * Determines the brand-driven color codes used in the SVG
+   */
+  color: PropTypes.oneOf(GRAPHIC_COLORS),
+};
+
+EuiCardGraphic.defaultProps = {
+  color: 'blue',
+};

src/components/card/index.js

@@ -1,3 +1,7 @@
 export {
   EuiCard,
 } from './card';
+
+export {
+  EuiCardGraphic,
+} from './card_graphic';

src/components/index.js

@@ -39,6 +39,7 @@ export {
 
 export {
   EuiCard,
+  EuiCardGraphic,
 } from './card';
 
 export {