增加^符号

demoV2/Layouter/GeneralizedList.js

@@ -63,6 +63,40 @@ SV.registerShape('three-cell-node', {
             });
         }
 
+        //节点没有原子时
+        if(!cfg.sub){
+            group.addShape('text', {
+                attrs: {
+                    x: width, 
+                    y: height * ( 8 / 7),
+                    textAlign: 'center',
+                    textBaseline: 'middle',
+                    text: '^',
+                    fill: '#000',
+                    fontSize: 20,
+                },
+                name: 'text',
+                draggable: true
+            });
+        }
+
+        //节点没有子表时
+        if(!cfg.next){
+            group.addShape('text', {
+                attrs: {
+                    x: width * (4 / 3), 
+                    y: height * ( 8 / 7),
+                    textAlign: 'center',
+                    textBaseline: 'middle',
+                    text: '^',
+                    fill: '#000',
+                    fontSize: 20,
+                },
+                name: 'text',
+                draggable: true
+            });
+        }
+
         return wrapperRect;
     },
 

src/RegisteredShape/binaryTreeNode.ts

@@ -1,3 +1,4 @@
+
 import { Util } from '../Common/util';
 
 
@@ -35,8 +36,10 @@ export default Util.registerShape('binary-tree-node', {
             draggable: true
         });
 
+        const style = (cfg.labelCfg && cfg.labelCfg.style) || {};
+        
         if (cfg.label) {
-            const style = (cfg.labelCfg && cfg.labelCfg.style) || {};
+       
             group.addShape('text', {
                 attrs: {
                     x: width, // 居中
@@ -53,6 +56,41 @@ export default Util.registerShape('binary-tree-node', {
             });
         }
 
+        //节点没有左孩子节点时
+        if(cfg.child[0] == "0x0"){
+            group.addShape('text', {
+                attrs: {
+                    x: width * (5 / 8), 
+                    y: height * ( 8 / 7),
+                    textAlign: 'center',
+                    textBaseline: 'middle',
+                    text: '^',
+                    fill: style.fill || '#000',
+                    fontSize: 18,
+                    cursor: cfg.style.cursor,
+                },
+                name: 'text',
+                draggable: true
+            });
+        }
+        //节点没有右孩子节点时
+        if(cfg.child[1] == "0x0"){
+            group.addShape('text', {
+                attrs: {
+                    x: width * (11 / 8), 
+                    y: height * ( 8 / 7),
+                    textAlign: 'center',
+                    textBaseline: 'middle',
+                    text: '^',
+                    fill: style.fill || '#000',
+                    fontSize: 18,
+                    cursor: cfg.style.cursor,
+                },
+                name: 'text',
+                draggable: true
+            });
+        }
+
         return wrapperRect;
     },
 

src/RegisteredShape/twoCellNode.ts

@@ -87,7 +87,44 @@ export default Util.registerShape('two-cell-node', {
                 });
             }
         }
+        console.log(cfg);
 
+        //图 数据结构中没有后续指针
+        if(cfg.id.includes('tableHeadNode') && !cfg.headNext){
+            group.addShape('text', {
+                attrs: {
+                    x: width * (5 / 4), 
+                    y: height * ( 8 / 7),
+                    textAlign: 'center',
+                    textBaseline: 'middle',
+                    text: '^',
+                    fill: style.fill || '#000',
+                    fontSize: 20,
+                    cursor: cfg.style.cursor,
+                },
+                name: 'text',
+                draggable: true
+            });
+        }
+
+        //哈希表 数据结构中没有后续指针
+        if(cfg.id.includes('head') && !cfg.start){
+            group.addShape('text', {
+                attrs: {
+                    x: width * (5 / 4), 
+                    y: height * ( 8 / 7),
+                    textAlign: 'center',
+                    textBaseline: 'middle',
+                    text: '^',
+                    fill: style.fill || '#000',
+                    fontSize: 20,
+                    cursor: cfg.style.cursor,
+                },
+                name: 'text',
+                draggable: true
+            });
+        }
+        
         return wrapperRect;
     },