feat(funnel): Intent to ship funnel type

Implement new funnel type

Ref naver#3449

demo/demo.js

@@ -414,6 +414,79 @@ var demos = {
 				];
 			}
 		},
+		FunnelChart: [
+			{
+				options: {
+					data: {
+						columns: [
+							["data1", 30],
+							["data2", 45],
+							["data3", 25],
+							["data4", 55]
+						],
+						type: "funnel",
+						order: null,
+						labels: {
+							format: function(v, id, i, texts) {
+						return id;
+							}
+						}
+					}
+				}
+			},
+			{
+				options: {
+					data: {
+						columns: [
+							["data1", 11300],
+							["data2", 12245],
+							["data3", 11125],
+							["data4", 13355],
+							["data5", 18562]
+						],
+						type: "funnel",
+						labels: true,
+						order: "asc"
+					},
+					funnel: {
+						neck: {
+							width: 200,
+							height: 50
+						}
+					}
+				}
+			},
+			{
+				options: {
+					data: {
+						columns: [
+							["data1", 130],
+							["data2", 245],
+							["data3", 425],
+							["data4", 325],
+							["data5", 555]
+						],
+						type: "funnel",
+						order: "desc",
+						labels: {
+							format: function(v, id, i, texts) {
+						return `${id} ${v}`;
+							}
+						}
+					},
+					funnel: {
+						neck: {
+							width: {
+								ratio: 0.3
+							},
+							height: {
+								ratio: 0.5
+							}
+						}
+					}
+				}
+			},
+		],
 		GaugeChart: {
 			options: {
 				data: {
@@ -5621,7 +5694,7 @@ setTimeout(function() {
 				]
 			}
 		],
-DonutRangeText: [{
+		DonutRangeText: [{
 			options: {
 				title: {
 					text: "Range text in 'absolute' value"

demo/index.html

@@ -142,6 +142,7 @@ <h4>Supported chart types</h4>
                                     <li><a href="#Chart.CandlestickChart">Candlestick</a></li>
                                     <li><a href="#Chart.CombinationChart">Combination</a></li>
                                     <li><a href="#Chart.DonutChart">Donut</a></li>
+                                    <li><a href="#Chart.FunnelChart">Funnel</a></li>
                                     <li><a href="#Chart.GaugeChart">Gauge</a></li>
                                     <li><a href="#Chart.LineChart">Line</a></li>
                                     <li><a href="#Chart.PieChart">Pie</a></li>

src/Chart/api/tooltip.ts

@@ -2,6 +2,7 @@
  * Copyright (c) 2017 ~ present NAVER Corp.
  * billboard.js project is licensed under the MIT license
  */
+import {$SHAPE} from "../../config/classes";
 import {isDefined} from "../../module/util";
 
 /**
@@ -72,7 +73,7 @@ const tooltip = {
 	 */
 	show: function(args): void {
 		const $$ = this.internal;
-		const {$el, config, state: {eventReceiver, hasTreemap, inputType}} = $$;
+		const {$el, config, state: {eventReceiver, hasFunnel, hasTreemap, inputType}} = $$;
 		let index;
 		let mouse;
 
@@ -86,10 +87,10 @@ const tooltip = {
 			const {data} = args;
 			const y = $$.getYScaleById(data.id)?.(data.value);
 
-			if (hasTreemap && data.id) {
-				eventReceiver.rect = $el.main.select(
-					`${$$.selectorTarget(data.id, undefined, "rect")}`
-				);
+			if ((hasFunnel || hasTreemap) && data.id) {
+				const selector = $$.selectorTarget(data.id, undefined, `.${$SHAPE.shape}`);
+
+				eventReceiver.rect = $el.main.select(selector);
 			} else if ($$.isMultipleX()) {
 				// if multiple xs, target point will be determined by mouse
 				mouse = [$$.xx(data), y];

src/ChartInternal/ChartInternal.ts

@@ -193,8 +193,9 @@ export default class ChartInternal {
 		checkModuleImport($$);
 
 		state.hasRadar = !state.hasAxis && $$.hasType("radar");
+		state.hasFunnel = !state.hasAxis && $$.hasType("funnel");
 		state.hasTreemap = !state.hasAxis && $$.hasType("treemap");
-		state.hasAxis = !$$.hasArcType() && !state.hasTreemap;
+		state.hasAxis = !$$.hasArcType() && !state.hasFunnel && !state.hasTreemap;
 
 		// datetime to be used for uniqueness
 		state.datetimeId = `bb-${+new Date() * (getRandom() as number)}`;
@@ -347,7 +348,7 @@ export default class ChartInternal {
 	initWithData(data): void {
 		const $$ = <any>this;
 		const {config, scale, state, $el, org} = $$;
-		const {hasAxis, hasTreemap} = state;
+		const {hasAxis, hasFunnel, hasTreemap} = state;
 		const hasInteraction = config.interaction_enabled;
 		const hasPolar = $$.hasType("polar");
 		const labelsBGColor = config.data_labels_backgroundColors;
@@ -458,7 +459,7 @@ export default class ChartInternal {
 		// Define regions
 		const main = $el.svg.append("g")
 			.classed($COMMON.main, true)
-			.attr("transform", hasTreemap ? null : $$.getTranslate("main"));
+			.attr("transform", hasFunnel || hasTreemap ? null : $$.getTranslate("main"));
 
 		$el.main = main;
 
@@ -566,6 +567,8 @@ export default class ChartInternal {
 			});
 		} else if (hasTreemap) {
 			types.push("Treemap");
+		} else if ($$.hasType("funnel")) {
+			types.push("Funnel");
 		} else {
 			const hasPolar = $$.hasType("polar");
 
@@ -670,7 +673,7 @@ export default class ChartInternal {
 	 */
 	updateTargets(targets): void {
 		const $$ = <any>this;
-		const {hasAxis, hasRadar, hasTreemap} = $$.state;
+		const {hasAxis, hasFunnel, hasRadar, hasTreemap} = $$.state;
 		const helper = type =>
 			$$[`updateTargetsFor${type}`](
 				targets.filter($$[`is${type}Type`].bind($$))
@@ -703,7 +706,8 @@ export default class ChartInternal {
 			}
 
 			helper(type);
-			// Arc, Polar, Radar
+		} else if (hasFunnel) {
+			helper("Funnel");
 		} else if (hasTreemap) {
 			helper("Treemap");
 		}

src/ChartInternal/data/IData.ts

@@ -8,6 +8,13 @@ type TDataRow = {value: number | null, id: string, index: number, name?: string}
 export type TDomain = Date | number;
 export type TDomainRange = [TDomain, TDomain];
 
+export interface IFunnelData {
+	id: string; // for compatibility
+	value: number;
+	ratio?: number;
+	coords?: number[][];
+}
+
 export interface ITreemapData {
 	name: string;
 	id?: string; // for compatibility

src/ChartInternal/interactions/interaction.ts

@@ -55,18 +55,18 @@ export default {
 	 */
 	setOverOut(isOver: boolean, d: number | IArcDataRow): void {
 		const $$ = this;
-		const {config, state: {hasRadar, hasTreemap}, $el: {main}} = $$;
-		const isArcTreemap = isObject(d);
+		const {config, state: {hasFunnel, hasRadar, hasTreemap}, $el: {main}} = $$;
+		const isArcishData = isObject(d);
 
 		// Call event handler
-		if (isArcTreemap || d !== -1) {
+		if (isArcishData || d !== -1) {
 			const callback = config[isOver ? "data_onover" : "data_onout"].bind($$.api);
 
-			config.color_onover && $$.setOverColor(isOver, d, isArcTreemap);
+			config.color_onover && $$.setOverColor(isOver, d, isArcishData);
 
-			if (isArcTreemap && "id") {
+			if (isArcishData && "id") {
 				const suffix = $$.getTargetSelectorSuffix((d as IArcDataRow).id);
-				const selector = hasTreemap ?
+				const selector = hasFunnel || hasTreemap ?
 					`${$COMMON.target + suffix} .${$SHAPE.shape}` :
 					$ARC.arc + suffix;
 
@@ -179,13 +179,14 @@ export default {
 			state: {
 				eventReceiver,
 				hasAxis,
+				hasFunnel,
 				hasRadar,
 				hasTreemap
 			},
-			$el: {eventRect, radar, treemap}
+			$el: {eventRect, funnel, radar, treemap}
 		} = $$;
-		const element = (
-			(hasTreemap && eventReceiver.rect) ||
+		let element = (
+			((hasFunnel || hasTreemap) && eventReceiver.rect) ||
 			(hasRadar && radar.axes.select(`.${$AXIS.axis}-${index} text`)) || (
 				eventRect || $$.getArcElementByIdOrIndex?.(index)
 			)
@@ -224,8 +225,13 @@ export default {
 				bubbles: hasRadar // radar type needs to bubble up event
 			};
 
+			// for funnel and treemap event bound to <g> node
+			if (hasFunnel || hasTreemap) {
+				element = (funnel ?? treemap).node();
+			}
+
 			emulateEvent[/^(mouse|click)/.test(type) ? "mouse" : "touch"](
-				hasTreemap ? treemap.node() : element,
+				element,
 				type,
 				params
 			);

src/ChartInternal/internals/class.ts

@@ -18,7 +18,7 @@ export default {
 	 */
 	getClass(type: string, withShape: boolean): Function {
 		const isPlural = /s$/.test(type);
-		const useIdKey = /^(area|arc|line|treemap)s?$/.test(type);
+		const useIdKey = /^(area|arc|line|funnel|treemap)s?$/.test(type);
 		const key = isPlural ? "id" : "index";
 
 		return (d): string => {

src/ChartInternal/internals/redraw.ts

@@ -82,6 +82,9 @@ export default {
 			// polar
 			$el.polar && $$.redrawPolar();
 
+			// funnel
+			$el.funnel && $$.redrawFunnel();
+
 			// treemap
 			treemap && $$.updateTreemap(durationForExit);
 		}

src/ChartInternal/internals/size.ts

@@ -309,7 +309,7 @@ export default {
 		const $$ = this;
 		const {config, state, $el: {legend}} = $$;
 		const isRotated = config.axis_rotated;
-		const isNonAxis = $$.hasArcType() || state.hasTreemap;
+		const isNonAxis = $$.hasArcType() || state.hasFunnel || state.hasTreemap;
 		const isFitPadding = config.padding?.mode === "fit";
 
 		!isInit && $$.setContainerSize();

src/ChartInternal/internals/text.ts

@@ -139,7 +139,7 @@ export default {
 
 		$el.main.select(`.${$COMMON.chart}`).append("g")
 			.attr("class", $TEXT.chartTexts)
-			.style("pointer-events", $el.treemap ? "none" : null);
+			.style("pointer-events", $el.funnel || $el.treemap ? "none" : null);
 	},
 
 	/**
@@ -240,9 +240,10 @@ export default {
 		const $$ = this;
 		const {config} = $$;
 		const labelColors = config.data_labels_colors;
-		const defaultColor = ($$.isArcType(d) && !$$.isRadarType(d)) || $$.isTreemapType(d) ?
-			null :
-			$$.color(d);
+		const defaultColor =
+			($$.isArcType(d) && !$$.isRadarType(d)) || $$.isFunnelType(d) || $$.isTreemapType(d) ?
+				null :
+				$$.color(d);
 		let color;
 
 		if (isString(labelColors)) {
@@ -390,11 +391,12 @@ export default {
 	 */
 	generateXYForText(indices, forX?: boolean): (d, i) => number {
 		const $$ = this;
-		const {state: {hasRadar, hasTreemap}} = $$;
+		const {state: {hasRadar, hasFunnel, hasTreemap}} = $$;
 		const types = Object.keys(indices);
 		const points = {};
 		const getter = forX ? $$.getXForText : $$.getYForText;
 
+		hasFunnel && types.push("funnel");
 		hasRadar && types.push("radar");
 		hasTreemap && types.push("treemap");
 
@@ -406,6 +408,7 @@ export default {
 			const type = ($$.isAreaType(d) && "area") ||
 				($$.isBarType(d) && "bar") ||
 				($$.isCandlestickType(d) && "candlestick") ||
+				($$.isFunnelType(d) && "funnel") ||
 				($$.isRadarType(d) && "radar") ||
 				($$.isTreemapType(d) && "treemap") || "line";
 
@@ -474,15 +477,18 @@ export default {
 		const $$ = this;
 		const {config} = $$;
 		const isRotated = config.axis_rotated;
+		const isFunnelType = $$.isFunnelType(d);
 		const isTreemapType = $$.isTreemapType(d);
-		let xPos = points[0][0];
+		let xPos = points ? points[0][0] : 0;
 
 		if ($$.isCandlestickType(d)) {
 			if (isRotated) {
 				xPos = $$.getCandlestickData(d)?._isUp ? points[2][2] + 4 : points[2][1] - 4;
 			} else {
 				xPos += (points[1][0] - xPos) / 2;
 			}
+		} else if (isFunnelType) {
+			xPos += $$.state.current.width / 2;
 		} else if (isTreemapType) {
 			xPos += config.data_labels.centered ? 0 : 5;
 		} else {
@@ -524,6 +530,7 @@ export default {
 		const isRotated = config.axis_rotated;
 		const isInverted = config[`axis_${axis?.getId(d.id)}_inverted`];
 		const isBarType = $$.isBarType(d);
+		const isFunnelType = $$.isFunnelType(d);
 		const isTreemapType = $$.isTreemapType(d);
 		const r = config.point_r;
 		const rect = getBoundingRect(textElement);
@@ -544,6 +551,10 @@ export default {
 					yPos += 15 * (value._isUp ? 1 : -1);
 				}
 			}
+		} else if (isFunnelType) {
+			yPos = points ?
+				points[0][1] + ((points[1][1] - points[0][1]) / 2) + rect.height / 2 - 3 :
+				0;
 		} else if (isTreemapType) {
 			yPos = points[0][1] + (config.data_labels.centered ? 0 : rect.height + 5);
 		} else {