fix(g-svg): mouseenter and mouseleave should be effective, close antv…

…is#205

packages/g-base/src/event/event-contoller.ts

@@ -4,7 +4,7 @@
  */
 import GraphEvent from './graph-event';
 import { ICanvas, IShape, IBase } from '../interfaces';
-import { each } from '../util/util';
+import { each, isArray } from '../util/util';
 const TIME_INTERVAL = 120; // 判断拖拽和点击
 const CLICK_OFFSET = 40;
 const DELEGATION_SPLIT = ':';
@@ -28,6 +28,15 @@ const EVENTS = [
   'contextmenu',
 ];
 
+const EVENT_MAP = {
+  mouseenter: 'mouseleave',
+  dragenter: 'dragleave',
+  mouseover: ['mouseout', 'mouseleave'], // 需要按照特定顺序，先触发 mouseout 事件，再触发 mouseleave 事件
+  mouseleave: 'mouseenter',
+  dragleave: 'dragenter',
+  mouseout: ['mouseover', 'mouseenter'], // 需要按照特定顺序，先触发 mouseover 事件，再触发 mouseenter 事件
+};
+
 // 是否元素的父容器
 function isParent(container, shape) {
   // 所有 shape 都是 canvas 的子元素
@@ -194,6 +203,16 @@ class EventController {
       const preShape = this.currentShape;
       // 如果进入、移出画布时存在图形，则要分别出发事件
       if (type === 'mouseenter' || type === 'dragenter' || type === 'mouseover') {
+        // 从图形进入画布，preShape 上的事件最先触发
+        if (preShape) {
+          if (isArray(EVENT_MAP[type])) {
+            each(EVENT_MAP[type], (item) => {
+              this._emitEvent(item, event, pointInfo, null, preShape, null); // 图形 => 画布
+            });
+          } else {
+            this._emitEvent(EVENT_MAP[type], event, pointInfo, null, preShape, null); // 图形 => 画布
+          }
+        }
         this._emitEvent(type, event, pointInfo, null, null, shape); // 先进入画布
         if (shape) {
           this._emitEvent(type, event, pointInfo, shape, null, shape); // 再触发图形的事件
@@ -203,6 +222,16 @@ class EventController {
           this._emitEvent(type, event, pointInfo, preShape, preShape, null); // 先触发图形的事件
         }
         this._emitEvent(type, event, pointInfo, null, preShape, null); // 再触发离开画布事件
+        // 从画布进入图形，shape 上的事件最后触发
+        if (shape) {
+          if (isArray(EVENT_MAP[type])) {
+            each(EVENT_MAP[type], (item) => {
+              this._emitEvent(item, event, pointInfo, shape, null, shape);
+            });
+          } else {
+            this._emitEvent(EVENT_MAP[type], event, pointInfo, shape, null, shape);
+          }
+        }
       } else {
         this._emitEvent(type, event, pointInfo, shape, null, null); // 一般事件中不需要考虑 from, to
       }

packages/g-svg/tests/bugs/issue-205-spec.js

@@ -0,0 +1,60 @@
+const expect = require('chai').expect;
+import Canvas from '../../src/canvas';
+
+export function simulateMouseEvent(dom, type, cfg) {
+  const event = new MouseEvent(type, cfg);
+  dom.dispatchEvent(event);
+}
+
+const dom = document.createElement('div');
+document.body.appendChild(dom);
+dom.id = 'c1';
+
+describe('#205', () => {
+  const canvas = new Canvas({
+    container: dom,
+    width: 500,
+    height: 500,
+  });
+  const el = canvas.get('el');
+
+  function getClientPoint(x, y) {
+    const point = canvas.getClientByPoint(x, y);
+    return {
+      clientX: point.x,
+      clientY: point.y,
+    };
+  }
+
+  it('mouseenter and mouseleave should be effective', () => {
+    const group = canvas.addGroup();
+    const shape = group.addShape('circle', {
+      attrs: {
+        x: 100,
+        y: 100,
+        r: 40,
+        fill: 'red',
+      },
+    });
+    let flag = 0;
+
+    shape.on('mouseenter', () => {
+      flag = 1;
+    });
+    shape.on('mouseleave', () => {
+      flag = 2;
+    });
+
+    const { clientX, clientY } = getClientPoint(100, 100);
+    simulateMouseEvent(el, 'mouseenter', {
+      clientX,
+      clientY,
+    });
+    expect(flag).eqls(1);
+    simulateMouseEvent(el, 'mouseleave', {
+      clientX: clientX + 50,
+      clientY: clientX + 50,
+    });
+    expect(flag).eqls(2);
+  });
+});