版本兼容

src/core/compatibility.js

@@ -13,7 +13,12 @@ Utils.extend(KityMinder, {
 
         /* 脑图数据升级 */
         function c_120_130(json) {
-
+            traverse(json, function(node) {
+                var data = node.data;
+                delete data.layout_bottom_offset;
+                delete data.layout_default_offset;
+                delete data.layout_filetree_offset;
+            });
         }
 
         /**
@@ -57,6 +62,8 @@ Utils.extend(KityMinder, {
             case '1.1.3':
                 c_113_120(json);
             case '1.2.0':
+            case '1.2.1':
+                c_120_130(json);
         }
 
         return json;

src/module/clipboard.js

@@ -38,6 +38,8 @@ KityMinder.registerModule( "ClipboardModule", function () {
         execute: function(km) {
             var ancestors = km.getSelectedAncestors();
 
+            if (ancestors.length === 0) return;
+
             sendToClipboard(ancestors);
 
             km.select(MinderNode.getCommonAncestor(ancestors), true);