Add download props to Legend component, export downloadSvg util

Author: keller-mark

src/components/legends/Legend.vue

@@ -8,13 +8,17 @@
  :getScale="getScale"
  :getStack="getStack"
  :clickHandler="clickHandler"
+ :showDownloadButton="showDownloadButton"
+ :downloadName="downloadName"
  />
  <ContinuousLegend v-if="legendType === 'continuous'" 
  :variable="variable"
  :lWidth="lWidth"
  :lItemHeight="lItemHeight"
  :getScale="getScale"
  :getStack="getStack"
+ :showDownloadButton="showDownloadButton"
+ :downloadName="downloadName"
  />
  </div>
 </template>
@@ -69,6 +73,14 @@ export default {
  },
  'clickHandler': {
  type: Function
+ },
+ 'showDownloadButton': {
+ type: Boolean,
+ default: false
+ },
+ 'downloadName': {
+ type: String,
+ default: 'legend'
  }
  },
  data() {

src/index.js

@@ -50,6 +50,7 @@ import Expected from './expected';
 
 // Other
 import { EVENT_TYPES, EVENT_SUBTYPES, EVENT_SUBTYPE_RESETS } from './history/base-events';
+import { downloadSvg } from './helpers';
 
 // Reference: https://stackoverflow.com/questions/28282295/getbbox-of-svg-when-hidden
 const _getBBox = SVGGraphicsElement.prototype.getBBox; 
@@ -120,4 +121,5 @@ export {
  // Other
  computedParam,
  EVENT_TYPES, EVENT_SUBTYPES, EVENT_SUBTYPE_RESETS,
+ downloadSvg,
 }