[Lens] Pie and donuts should have a size ratio setting

src/plugins/vis_types/pie/public/editor/collections.ts

@@ -7,6 +7,7 @@
  */
 
 import { i18n } from '@kbn/i18n';
+import { EMPTY_SIZE_RATIOS } from './constants';
 import { LabelPositions, ValueFormats } from '../types';
 
 export const getLabelPositions = [
@@ -38,3 +39,27 @@ export const getValuesFormats = [
     value: ValueFormats.VALUE,
   },
 ];
+
+export const emptySizeRatioOptions = [
+  {
+    id: 'emptySizeRatioOption-small',
+    value: EMPTY_SIZE_RATIOS.SMALL,
+    label: i18n.translate('visTypePie.emptySizeRatioOptions.small', {
+      defaultMessage: 'Small',
+    }),
+  },
+  {
+    id: 'emptySizeRatioOption-medium',
+    value: EMPTY_SIZE_RATIOS.MEDIUM,
+    label: i18n.translate('visTypePie.emptySizeRatioOptions.medium', {
+      defaultMessage: 'Medium',
+    }),
+  },
+  {
+    id: 'emptySizeRatioOption-large',
+    value: EMPTY_SIZE_RATIOS.LARGE,
+    label: i18n.translate('visTypePie.emptySizeRatioOptions.large', {
+      defaultMessage: 'Large',
+    }),
+  },
+];

src/plugins/vis_types/pie/public/editor/components/pie.test.tsx

@@ -135,4 +135,18 @@ describe('PalettePicker', function () {
       expect(findTestSubject(component, 'visTypePieValueDecimals').length).toBe(1);
     });
   });
+
+  it('renders the donut size button group for the elastic charts implementation', async () => {
+    component = mountWithIntl(<PieOptions {...props} />);
+    await act(async () => {
+      expect(findTestSubject(component, 'visTypePieEmptySizeRatioButtonGroup').length).toBe(1);
+    });
+  });
+
+  it('not renders the donut size button group for the vislib implementation', async () => {
+    component = mountWithIntl(<PieOptions {...props} showElasticChartsOptions={false} />);
+    await act(async () => {
+      expect(findTestSubject(component, 'visTypePieEmptySizeRatioButtonGroup').length).toBe(0);
+    });
+  });
 });

src/plugins/vis_types/pie/public/editor/components/pie.tsx

@@ -6,7 +6,7 @@
  * Side Public License, v 1.
  */
 
-import React, { useState, useEffect } from 'react';
+import React, { useState, useEffect, useCallback } from 'react';
 import { METRIC_TYPE } from '@kbn/analytics';
 import {
   EuiPanel,
@@ -17,6 +17,7 @@ import {
   EuiIconTip,
   EuiFlexItem,
   EuiFlexGroup,
+  EuiButtonGroup,
 } from '@elastic/eui';
 import { i18n } from '@kbn/i18n';
 import { FormattedMessage } from '@kbn/i18n-react';
@@ -33,11 +34,15 @@ import { TruncateLabelsOption } from './truncate_labels';
 import { PaletteRegistry } from '../../../../../charts/public';
 import { DEFAULT_PERCENT_DECIMALS } from '../../../common';
 import { PieVisParams, LabelPositions, ValueFormats, PieTypeProps } from '../../types';
-import { getLabelPositions, getValuesFormats } from '../collections';
+import { emptySizeRatioOptions, getLabelPositions, getValuesFormats } from '../collections';
 import { getLegendPositions } from '../positions';
 
 export interface PieOptionsProps extends VisEditorOptionsProps<PieVisParams>, PieTypeProps {}
 
+const emptySizeRatioLabel = i18n.translate('visTypePie.editors.pie.emptySizeRatioLabel', {
+  defaultMessage: 'Inner area size',
+});
+
 function DecimalSlider<ParamName extends string>({
   paramName,
   value,
@@ -96,6 +101,14 @@ const PieOptions = (props: PieOptionsProps) => {
     fetchPalettes();
   }, [props.palettes]);
 
+  const handleEmptySizeRatioChange = useCallback(
+    (sizeId) => {
+      const emptySizeRatio = emptySizeRatioOptions.find(({ id }) => id === sizeId)?.value;
+      setValue('emptySizeRatio', emptySizeRatio);
+    },
+    [setValue]
+  );
+
   return (
     <>
       <EuiPanel paddingSize="s">
@@ -116,6 +129,23 @@ const PieOptions = (props: PieOptionsProps) => {
           value={stateParams.isDonut}
           setValue={setValue}
         />
+        {props.showElasticChartsOptions && stateParams.isDonut && (
+          <EuiFormRow label={emptySizeRatioLabel} fullWidth>
+            <EuiButtonGroup
+              isFullWidth
+              name="emptySizeRatio"
+              buttonSize="compressed"
+              legend={emptySizeRatioLabel}
+              options={emptySizeRatioOptions}
+              idSelected={
+                emptySizeRatioOptions.find(({ value }) => value === stateParams.emptySizeRatio)
+                  ?.id ?? 'emptySizeRatioOption-small'
+              }
+              onChange={handleEmptySizeRatioChange}
+              data-test-subj="visTypePieEmptySizeRatioButtonGroup"
+            />
+          </EuiFormRow>
+        )}
         <BasicOptions {...props} legendPositions={getLegendPositions} />
         {props.showElasticChartsOptions && (
           <>

src/plugins/vis_types/pie/public/editor/constants.ts

@@ -0,0 +1,13 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+export enum EMPTY_SIZE_RATIOS {
+  SMALL = 0.3,
+  MEDIUM = 0.54,
+  LARGE = 0.7,
+}

src/plugins/vis_types/pie/public/pie_fn.test.ts

@@ -10,6 +10,7 @@ import { functionWrapper } from '../../../expressions/common/expression_function
 import { createPieVisFn } from './pie_fn';
 import { PieVisConfig } from './types';
 import { Datatable } from '../../../expressions/common/expression_types/specs';
+import { EMPTY_SIZE_RATIOS } from './editor/constants';
 
 describe('interpreter/functions#pie', () => {
   const fn = functionWrapper(createPieVisFn());
@@ -23,6 +24,7 @@ describe('interpreter/functions#pie', () => {
     addLegend: true,
     legendPosition: 'right',
     isDonut: true,
+    emptySizeRatio: EMPTY_SIZE_RATIOS.SMALL,
     nestedLegend: true,
     truncateLegend: true,
     maxLegendLines: true,

src/plugins/vis_types/pie/public/pie_fn.ts

@@ -117,6 +117,12 @@ export const createPieVisFn = (): VisTypePieExpressionFunctionDefinition => ({
       }),
       default: false,
     },
+    emptySizeRatio: {
+      types: ['number'],
+      help: i18n.translate('visTypePie.function.args.emptySizeRatioHelpText', {
+        defaultMessage: 'Defines donut inner empty area size',
+      }),
+    },
     palette: {
       types: ['string'],
       help: i18n.translate('visTypePie.function.args.paletteHelpText', {

src/plugins/vis_types/pie/public/to_ast.ts

@@ -54,6 +54,7 @@ export const toExpressionAst: VisToExpressionAst<PieVisParams> = async (vis, par
     maxLegendLines: vis.params.maxLegendLines,
     distinctColors: vis.params?.distinctColors,
     isDonut: vis.params.isDonut,
+    emptySizeRatio: vis.params.emptySizeRatio,
     palette: vis.params?.palette?.name,
     labels: prepareLabels(vis.params.labels),
     metric: schemas.metric.map(prepareDimension),

src/plugins/vis_types/pie/public/types/types.ts

@@ -13,6 +13,7 @@ import type { SerializedFieldFormat } from '../../../../field_formats/common';
 import { ExpressionValueVisDimension } from '../../../../visualizations/public';
 import { ExpressionValuePieLabels } from '../expression_functions/pie_labels';
 import { PaletteOutput, ChartsPluginSetup } from '../../../../charts/public';
+import { EMPTY_SIZE_RATIOS } from '../editor/constants';
 
 export interface Dimension {
   accessor: number;
@@ -38,6 +39,7 @@ interface PieCommonParams {
   maxLegendLines: number;
   distinctColors: boolean;
   isDonut: boolean;
+  emptySizeRatio?: EMPTY_SIZE_RATIOS;
 }
 
 export interface LabelsParams {

src/plugins/vis_types/pie/public/utils/get_config.ts

@@ -54,7 +54,7 @@ export const getConfig = (
     sectorLineStroke: chartTheme.lineSeriesStyle?.point?.fill,
     sectorLineWidth: 1.5,
     circlePadding: 4,
-    emptySizeRatio: visParams.isDonut ? 0.3 : 0,
+    emptySizeRatio: visParams.isDonut ? visParams.emptySizeRatio : 0,
     ...usingMargin,
   };
   if (!visParams.labels.show) {

src/plugins/vis_types/pie/public/vis_type/pie.ts

@@ -14,6 +14,7 @@ import { DEFAULT_PERCENT_DECIMALS } from '../../common';
 import { PieVisParams, LabelPositions, ValueFormats, PieTypeProps } from '../types';
 import { toExpressionAst } from '../to_ast';
 import { getPieOptions } from '../editor/components';
+import { EMPTY_SIZE_RATIOS } from '../editor/constants';
 
 export const getPieVisTypeDefinition = ({
   showElasticChartsOptions = false,
@@ -39,6 +40,7 @@ export const getPieVisTypeDefinition = ({
       maxLegendLines: 1,
       distinctColors: false,
       isDonut: true,
+      emptySizeRatio: EMPTY_SIZE_RATIOS.SMALL,
       palette: {
         type: 'palette',
         name: 'default',

x-pack/plugins/lens/common/expressions/pie_chart/pie_chart.ts

@@ -101,6 +101,10 @@ export const pie: ExpressionFunctionDefinition<
       help: '',
       types: ['palette'],
     },
+    emptySizeRatio: {
+      types: ['number'],
+      help: '',
+    },
   },
   inputTypes: ['lens_multitable'],
   fn(data: LensMultiTable, args: PieExpressionArgs) {

x-pack/plugins/lens/common/expressions/pie_chart/types.ts

@@ -20,6 +20,7 @@ export interface SharedPieLayerState {
   showValuesInLegend?: boolean;
   nestedLegend?: boolean;
   percentDecimals?: number;
+  emptySizeRatio?: number;
   legendMaxLines?: number;
   truncateLegend?: boolean;
 }

x-pack/plugins/lens/public/pie_visualization/constants.ts

@@ -6,3 +6,9 @@
  */
 
 export const DEFAULT_PERCENT_DECIMALS = 2;
+
+export enum EMPTY_SIZE_RATIOS {
+  SMALL = 0.3,
+  MEDIUM = 0.54,
+  LARGE = 0.7,
+}

x-pack/plugins/lens/public/pie_visualization/partition_charts_meta.ts

@@ -14,6 +14,7 @@ import { LensIconChartPie } from '../assets/chart_pie';
 import { LensIconChartTreemap } from '../assets/chart_treemap';
 import { LensIconChartMosaic } from '../assets/chart_mosaic';
 import { LensIconChartWaffle } from '../assets/chart_waffle';
+import { EMPTY_SIZE_RATIOS } from './constants';
 
 import type { SharedPieLayerState } from '../../common/expressions';
 import type { PieChartTypes } from '../../common/expressions/pie_chart/types';
@@ -37,6 +38,11 @@ interface PartitionChartMeta {
       value: SharedPieLayerState['numberDisplay'];
       inputDisplay: string;
     }>;
+    emptySizeRatioOptions?: Array<{
+      id: string;
+      value: EMPTY_SIZE_RATIOS;
+      label: string;
+    }>;
   };
   legend: {
     flat?: boolean;
@@ -110,6 +116,30 @@ const numberOptions: PartitionChartMeta['toolbarPopover']['numberOptions'] = [
   },
 ];
 
+const emptySizeRatioOptions: PartitionChartMeta['toolbarPopover']['emptySizeRatioOptions'] = [
+  {
+    id: 'emptySizeRatioOption-small',
+    value: EMPTY_SIZE_RATIOS.SMALL,
+    label: i18n.translate('xpack.lens.pieChart.emptySizeRatioOptions.small', {
+      defaultMessage: 'Small',
+    }),
+  },
+  {
+    id: 'emptySizeRatioOption-medium',
+    value: EMPTY_SIZE_RATIOS.MEDIUM,
+    label: i18n.translate('xpack.lens.pieChart.emptySizeRatioOptions.medium', {
+      defaultMessage: 'Medium',
+    }),
+  },
+  {
+    id: 'emptySizeRatioOption-large',
+    value: EMPTY_SIZE_RATIOS.LARGE,
+    label: i18n.translate('xpack.lens.pieChart.emptySizeRatioOptions.large', {
+      defaultMessage: 'Large',
+    }),
+  },
+];
+
 export const PartitionChartsMeta: Record<PieChartTypes, PartitionChartMeta> = {
   donut: {
     icon: LensIconChartDonut,
@@ -122,6 +152,7 @@ export const PartitionChartsMeta: Record<PieChartTypes, PartitionChartMeta> = {
     toolbarPopover: {
       categoryOptions,
       numberOptions,
+      emptySizeRatioOptions,
     },
     legend: {
       getShowLegendDefault: (bucketColumns) => bucketColumns.length > 1,

x-pack/plugins/lens/public/pie_visualization/render_function.tsx

@@ -82,6 +82,7 @@ export function PieComponent(
     legendPosition,
     nestedLegend,
     percentDecimals,
+    emptySizeRatio,
     legendMaxLines,
     truncateLegend,
     hideLabels,
@@ -229,7 +230,7 @@ export function PieComponent(
       config.fillLabel = { textColor: 'rgba(0,0,0,0)' };
     }
   } else {
-    config.emptySizeRatio = shape === 'donut' ? 0.3 : 0;
+    config.emptySizeRatio = shape === 'donut' ? emptySizeRatio : 0;
 
     if (hideLabels || categoryDisplay === 'hide') {
       // Force all labels to be linked, then prevent links from showing

x-pack/plugins/lens/public/pie_visualization/to_expression.ts

@@ -8,9 +8,8 @@
 import type { Ast } from '@kbn/interpreter/common';
 import type { PaletteRegistry } from 'src/plugins/charts/public';
 import type { Operation, DatasourcePublicAPI } from '../types';
-import { DEFAULT_PERCENT_DECIMALS } from './constants';
+import { DEFAULT_PERCENT_DECIMALS, EMPTY_SIZE_RATIOS } from './constants';
 import { shouldShowValuesInLegend } from './render_helpers';
-
 import type { PieVisualizationState } from '../../common/expressions';
 import { getDefaultVisualValuesForLayer } from '../shared_components/datasource_default_values';
 
@@ -59,6 +58,7 @@ function expressionHelper(
           categoryDisplay: [layer.categoryDisplay],
           legendDisplay: [layer.legendDisplay],
           legendPosition: [layer.legendPosition || 'right'],
+          emptySizeRatio: [layer.emptySizeRatio ?? EMPTY_SIZE_RATIOS.SMALL],
           showValuesInLegend: [shouldShowValuesInLegend(layer, state.shape)],
           percentDecimals: [
             state.shape === 'waffle'