Introduce the convept of Feature to a topic.

mindplot/src/main/javascript/commands/RemoveFeatureFromTopicCommand.js

@@ -0,0 +1,45 @@
+/*
+ *    Copyright [2011] [wisemapping]
+ *
+ *   Licensed under WiseMapping Public License, Version 1.0 (the "License").
+ *   It is basically the Apache License, Version 2.0 (the "License") plus the
+ *   "powered by wisemapping" text requirement on every single page;
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the license at
+ *
+ *       http://www.wisemapping.org/license
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+mindplot.commands.RemoveFeatureFromTopicCommand = new Class({
+    Extends:mindplot.Command,
+    initialize: function(topicId, featureId) {
+        $assert($defined(topicId), 'topicId can not be null');
+        $assert(featureId, 'iconModel can not be null');
+
+        this._topicId = topicId;
+        this._featureId = featureId;
+        this._oldFeature = null;
+    },
+
+    execute: function(commandContext) {
+        var topic = commandContext.findTopics(this._topicId)[0];
+
+        var feature = topic.findFeatureById(this._featureId);
+        topic.removeFeature(feature);
+        this._oldFeature = feature;
+    },
+
+    undoExecute: function(commandContext) {
+        var topic = commandContext.findTopics(this._topicId)[0];
+
+        var feature = this._oldFeature;
+        topic.addFeature(feature.getType(), feature.getAttributes());
+        this._oldFeature = null;
+    }
+});