chore(graph): revert default item style

src/graph/graph.js

@@ -108,25 +108,7 @@ class Graph extends EventEmitter {
        * 边直接连接到节点的中心，不再考虑锚点
        * @type {Boolean}
        */
-      linkCenter: false,
-      /**
-       * 节点默认样式，也可以添加状态样式
-       * 例如：
-       * const graph = new G6.Graph({
-       *  nodeStyle: {
-       *    default: { fill: '#fff' },
-       *    selected: { fill: '#ccc', stroke: '#666' },
-       *    active: { lineWidth: 2 }
-       *  },
-       *  ...
-       * });
-       *
-       */
-      nodeStyle: {},
-      /**
-       * 边默认样式，用法同nodeStyle
-       */
-      edgeStyle: {}
+      linkCenter: false
     };
   }
 

src/item/edge.js

@@ -130,7 +130,6 @@ class Edge extends Item {
   }
 
   getShapeCfg(model) {
-    model = super.getShapeCfg(model);
     const linkCenter = this.get('linkCenter'); // 如果连接到中心，忽视锚点、忽视控制点
     const cfg = {};
     if (linkCenter) {

src/item/item.js

@@ -258,11 +258,6 @@ class Item {
   }
 
   getShapeCfg(model) {
-    const styles = this.get('styles');
-    if (styles && styles.default) {
-      // merge graph的item样式与数据模型中的样式
-      model.style = Util.mix({}, styles.default, model.style);
-    }
     return model;
   }
 

test/unit/graph/graph-spec.js

@@ -281,7 +281,7 @@ describe('all node link center', () => {
     graph.destroy();
     expect(graph.destroyed).eql(true);
   });
-  it('default node & edge style', () => {
+  /* it('default node & edge style', () => {
     const graph = new G6.Graph({
       container: div,
       width: 500,
@@ -341,5 +341,5 @@ describe('all node link center', () => {
     graph.setItemState(edge, 'selected', false);
     expect(edgeKeyShape.attr('stroke')).to.equal('blue');
     expect(edgeKeyShape.attr('strokeOpacity')).to.equal(0.5);
-  });
+  }); */
 });