feat(pie): optimize spider

__tests__/plots/static/index.ts

@@ -337,3 +337,5 @@ export { stackBarAnnotationStyleText } from './stack-bar-annotation-style-text';
 export { githubStarIntervalDarkThemeTransparent } from './github-star-interval-dark-theme-transparent';
 export { diamondIntervalGroupX } from './diamond-interval-group-x';
 export { mockIntervalSeriesOrder } from './mock-interval-series-order';
+export { mockPieSpider } from './mock-pie-spider';
+export { mockPieSpiderRight } from './mock-pie-spider-right';

__tests__/plots/static/mock-pie-spider-right.ts

@@ -0,0 +1,32 @@
+import { G2Spec } from '../../../src';
+
+export function mockPieSpiderRight(): G2Spec {
+  return {
+    type: 'interval',
+    data: [
+      { type: '微博', value: 93.33 },
+      { type: '其他', value: 6.67 },
+      { type: '论坛', value: 4.77 },
+      { type: '网站', value: 1.44 },
+      { type: '微信', value: 1.12 },
+      { type: '客户端', value: 1.05 },
+      { type: '新闻', value: 0.81 },
+      { type: '视频', value: 0.39 },
+      { type: '博客', value: 0.37 },
+      { type: '报刊', value: 0.17 },
+    ].reverse(),
+    encode: {
+      y: 'value',
+      color: 'type',
+    },
+    labels: [
+      {
+        position: 'spider',
+        text: (obj) => `${obj.type} (${obj.value})`,
+        labelHeight: 30,
+      },
+    ],
+    transform: [{ type: 'stackY' }],
+    coordinate: { type: 'theta' },
+  };
+}

__tests__/plots/static/mock-pie-spider.ts

@@ -0,0 +1,31 @@
+import { G2Spec } from '../../../src';
+
+export function mockPieSpider(): G2Spec {
+  return {
+    type: 'interval',
+    data: [
+      { type: '微博', value: 93.33 },
+      { type: '其他', value: 6.67 },
+      { type: '论坛', value: 4.77 },
+      { type: '网站', value: 1.44 },
+      { type: '微信', value: 1.12 },
+      { type: '客户端', value: 1.05 },
+      { type: '新闻', value: 0.81 },
+      { type: '视频', value: 0.39 },
+      { type: '博客', value: 0.37 },
+      { type: '报刊', value: 0.17 },
+    ],
+    encode: {
+      y: 'value',
+      color: 'type',
+    },
+    labels: [
+      {
+        position: 'spider',
+        text: (obj) => `${obj.type} (${obj.value})`,
+      },
+    ],
+    transform: [{ type: 'stackY' }],
+    coordinate: { type: 'theta' },
+  };
+}

src/shape/label/label.ts

@@ -29,6 +29,7 @@ function getDefaultStyle(
   coordinate: Coordinate,
   theme: G2Theme,
   options: LabelOptions,
+  labels: Vector2[][],
 ): Record<string, any> {
   // For non-series mark, calc position for label based on
   // position and the bounds of shape.
@@ -48,7 +49,7 @@ function getDefaultStyle(
   }
   return {
     ...t,
-    ...processor(p, points, v, coordinate, options),
+    ...processor(p, points, v, coordinate, options, labels),
   };
 }
 
@@ -59,7 +60,7 @@ function getDefaultStyle(
 export const Label: SC<LabelOptions> = (options, context) => {
   const { coordinate, theme } = context;
   const { render } = options;
-  return (points, value) => {
+  return (points, value, style, labels) => {
     const {
       text,
       x,
@@ -73,7 +74,7 @@ export const Label: SC<LabelOptions> = (options, context) => {
       rotate = 0,
       transform = '',
       ...defaultStyle
-    } = getDefaultStyle(points, value, coordinate, theme, options);
+    } = getDefaultStyle(points, value, coordinate, theme, options, labels);
 
     return select(new Advance())
       .call(applyStyle, defaultStyle)

src/shape/label/position/spider.ts

@@ -1,21 +1,18 @@
 import { Coordinate } from '@antv/coord';
+import { sort } from 'd3-array';
 import { Vector2 } from '../../../runtime';
 import { isCircular } from '../../../utils/coordinate';
 import { LabelPosition } from './default';
 import { inferOutsideCircularStyle, radiusOf, angleOf } from './outside';
 
-/**
- * Spider label transform only suitable for the labels in polar coordinate, labels should distinguish coordinate type.
- */
-export function spider(
-  position: LabelPosition,
+const styleByPoints = new WeakMap();
+
+function compute(
   points: Vector2[],
   value: Record<string, any>,
   coordinate: Coordinate,
 ) {
-  if (!isCircular(coordinate)) return {};
   const { connectorLength, connectorLength2, connectorDistance } = value;
-
   const { ...style }: any = inferOutsideCircularStyle(
     'outside',
     points,
@@ -27,13 +24,50 @@ export function spider(
   const angle = angleOf(points, value, coordinate);
   const radius1 = radius + connectorLength + connectorLength2;
   const sign = Math.sin(angle) > 0 ? 1 : -1;
-
   const newX = center[0] + (radius1 + +connectorDistance) * sign;
-
   const { x: originX } = style;
   const dx = newX - originX;
   style.x += dx;
   style.connectorPoints[0][0] -= dx;
-
   return style;
 }
+
+function dodgeY(
+  styles: Record<string, any>[],
+  options: Record<string, any> = {},
+) {
+  const { labelHeight = 15 } = options;
+  const sortedStyles = sort(styles, (d) => d.y);
+  let preY = -labelHeight;
+  for (let i = 0; i < sortedStyles.length; ++i) {
+    const cur = sortedStyles[i];
+    const nextY = preY + labelHeight;
+    const dy = Math.max(0, nextY - cur.y);
+    cur.labelOffsetY = dy;
+    preY = cur.y + dy;
+  }
+}
+
+/**
+ * Spider label transform only suitable for the labels in polar coordinate,
+ * labels should distinguish coordinate type.
+ */
+export function spider(
+  position: LabelPosition,
+  points: Vector2[],
+  value: Record<string, any>,
+  coordinate: Coordinate,
+  options: Record<string, any>,
+  labels: Vector2[][],
+) {
+  if (!isCircular(coordinate)) return {};
+  if (styleByPoints.has(points)) return styleByPoints.get(points);
+  const styles = labels.map((points) => compute(points, value, coordinate));
+  const { width } = coordinate.getOptions();
+  const left = styles.filter((d) => d.x < width / 2);
+  const right = styles.filter((d) => d.x >= width / 2);
+  dodgeY(left, options);
+  dodgeY(right, options);
+  styles.forEach((style, i) => styleByPoints.set(labels[i], style));
+  return styleByPoints.get(points);
+}