add flexible leads to some components through the menu

diylc/diylc-core/src/org/diylc/common/IPlugInPort.java

@@ -375,5 +375,12 @@ public interface IPlugInPort extends ISelectionProcessor, IMouseProcessor, IKeyP
   /**   
    * @return size of extra space around the canvas
    */
-  double getExtraSpace();
+  double getExtraSpace();
+  
+  /**
+   * Applies changes to the current project as specified by the provided {@link IProjectEditor}. 
+   * 
+   * @param editor
+   */
+  void applyEditor(IProjectEditor editor);
 }

diylc/diylc-core/src/org/diylc/common/IProjectEditor.java

@@ -0,0 +1,34 @@
+/*
+
+    DIY Layout Creator (DIYLC).
+    Copyright (c) 2009-2018 held jointly by the individual authors.
+
+    This file is part of DIYLC.
+
+    DIYLC is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    DIYLC is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DIYLC.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+package org.diylc.common;
+
+import java.util.Set;
+
+import org.diylc.core.IDIYComponent;
+import org.diylc.core.Project;
+
+public interface IProjectEditor {
+
+  Set<IDIYComponent<?>> edit(Project project, Set<IDIYComponent<?>> selection);
+  
+  String getEditAction();
+}

diylc/diylc-core/src/org/diylc/presenter/Presenter.java

@@ -66,6 +66,7 @@ import org.diylc.common.IKeyProcessor;
 import org.diylc.common.INetlistAnalyzer;
 import org.diylc.common.IPlugIn;
 import org.diylc.common.IPlugInPort;
+import org.diylc.common.IProjectEditor;
 import org.diylc.common.PropertyWrapper;
 import org.diylc.common.VariantPackage;
 import org.diylc.core.ExpansionMode;
@@ -2288,6 +2289,29 @@ public class Presenter implements IPlugInPort {
       drawingManager.fireZoomChanged();
     }
   }
+  
+  @Override
+  public void applyEditor(IProjectEditor editor) {
+    LOG.debug(String.format("applyEditor(%s)", editor.getEditAction()));
+    Project oldProject = currentProject.clone();
+    try {
+      Set<IDIYComponent<?>> newSelection = editor.edit(currentProject, selectedComponents);
+      if (newSelection != null)      
+        updateSelection(newSelection);      
+    } catch (Exception e) {
+      LOG.error("Could not apply editor", e);
+      view.showMessage("Could not apply " + editor.getEditAction() + ". Check the log for details.", "Error", IView.ERROR_MESSAGE);
+    } finally {
+      // Notify the listeners.
+      if (!oldProject.equals(currentProject)) {
+        messageDispatcher.dispatchMessage(EventType.PROJECT_MODIFIED, oldProject, currentProject.clone(),
+            editor.getEditAction());
+        drawingManager.clearContinuityArea();
+        projectFileManager.notifyFileChange();
+      }
+      drawingManager.fireZoomChanged();
+    }
+  }
 
   @Override
   public ComponentType getNewComponentTypeSlot() {