fix: bullet的target支持回调函数处理 (#2397)

* fix: bullet的target支持回调函数处理

* Update issue-2229-spec.ts

Co-authored-by: hustcc <i@hust.cc>

__tests__/bugs/issue-2229-spec.ts

@@ -0,0 +1,67 @@
+import { Bullet } from '../../src/plots/bullet';
+import { createDiv } from '../utils/dom';
+
+const data = [
+  {
+    title: '重庆',
+    ranges: [30, 90, 120],
+    measures: [65],
+    target: 80,
+  },
+  {
+    title: '杭州',
+    ranges: [30, 90, 120],
+    measures: [50],
+    target: 100,
+  },
+  {
+    title: '广州',
+    ranges: [30, 90, 120],
+    measures: [40],
+    target: 85,
+  },
+  {
+    title: '深圳',
+    ranges: [30, 90, 120],
+    measures: [50],
+    target: 100,
+  },
+];
+
+describe('#2229', () => {
+  it('measureSize*rangeSize*targetSize', () => {
+    const bullet = new Bullet(createDiv('measureSize*rangeSize bullet'), {
+      width: 400,
+      height: 400,
+      data,
+      measureField: 'measures',
+      rangeField: 'ranges',
+      targetField: 'target',
+      xField: 'title',
+      size: {
+        range: () => {
+          return 20;
+        },
+        measure: () => {
+          return 15;
+        },
+        target: () => {
+          return 20;
+        },
+      },
+    });
+
+    bullet.render();
+    const chart = bullet.chart;
+    const rangeGeometry = chart.geometries[0];
+    expect(rangeGeometry.elements[0].getModel().size).toEqual(20);
+
+    const measureGeometry = chart.geometries[1];
+    expect(measureGeometry.elements[0].getModel().size).toEqual(15);
+
+    const targetGeometry = chart.geometries[2];
+    expect(targetGeometry.elements[0].getModel().size).toEqual(20 / 2);
+
+    bullet.destroy();
+  });
+});

src/plots/bullet/adaptor.ts

@@ -1,7 +1,8 @@
-import { get } from '@antv/util';
+import { get, isFunction } from '@antv/util';
 import { Params } from '../../core/adaptor';
 import { interaction, animation, theme, tooltip, scale } from '../../adaptor/common';
 import { flow, transformLabel, deepAssign } from '../../utils';
+import { Datum } from '../../types';
 import { interval, point } from '../../adaptor/geometries';
 import { BulletOptions } from './types';
 import { transformData } from './utils';
@@ -63,7 +64,9 @@ function geometry(params: Params<BulletOptions>): Params<BulletOptions> {
       point: {
         color: get(color, 'target'),
         style: get(bulletStyle, 'target'),
-        size: get(size, 'target') / 2,
+        size: isFunction(get(size, 'target'))
+          ? (data: Datum) => get(size, 'target')(data) / 2
+          : get(size, 'target') / 2,
         shape: layout === 'horizontal' ? 'line' : 'hyphen',
       },
     },