archive/net.sourceforge.phpeclipse.quantum.sql/src/com/quantum/view/bookmark/DeleteAction.java

   1 package com.quantum.view.bookmark;
   2
   3 import java.util.Iterator;
   4 import java.util.List;
   5
   6 import com.quantum.ImageStore;
   7 import com.quantum.Messages;
   8 import com.quantum.model.BookmarkCollection;
   9
  10 import org.eclipse.jface.dialogs.MessageDialog;
  11 import org.eclipse.jface.viewers.ISelectionProvider;
  12 import org.eclipse.jface.viewers.IStructuredSelection;
  13 import org.eclipse.ui.IViewPart;
  14 import org.eclipse.ui.actions.SelectionListenerAction;
  15
  16 /**
  17  * @author root
  18  *
  19  */
  20 public class DeleteAction extends SelectionListenerAction {
  21
  22     private IViewPart view;
  23
  24         public DeleteAction(IViewPart view, ISelectionProvider selectionProvider) {
  25         super(Messages.getString(DeleteAction.class.getName() + ".text"));
  26         setImageDescriptor(ImageStore.getImageDescriptor(ImageStore.DELETE));
  27                 this.view = view;
  28                 selectionProvider.addSelectionChangedListener(this);
  29         }
  30
  31         public void run() {
  32                 if (isEachSelectionInstanceOf(getSelectedNonResources().iterator(), BookmarkNode.class)) {
  33                         deleteBookmarks();
  34                 } else if (isEachSelectionInstanceOf(getSelectedNonResources().iterator(), QueryNode.class)) {
  35                         deleteQueries();
  36                 }
  37         }
  38
  39         /**
  40          *
  41          */
  42         private void deleteQueries() {
  43                 List nodes = getSelectedNonResources();
  44                 for (Iterator i = nodes.iterator(); i.hasNext();) {
  45                     QueryNode queryNode = (QueryNode) i.next();
  46                     if (queryNode != null) {
  47                         queryNode.getBookmark().removeQuery(queryNode.getQuery());
  48                     }
  49                 }
  50         }
  51
  52         /**
  53          *
  54          */
  55         private void deleteBookmarks() {
  56                 List bookmarkNodes = getSelectedNonResources();
  57                 boolean flag = MessageDialog.openConfirm(view.getSite().getShell(),
  58                                 Messages.getString(getClass(), "confirmTitle"),
  59                                 Messages.getString(getClass(), "confirmText"));
  60
  61                 for (Iterator i = bookmarkNodes.iterator(); flag && i.hasNext();) {
  62                     BookmarkNode bookmarkNode = (BookmarkNode) i.next();
  63                     if (bookmarkNode != null) {
  64                         BookmarkCollection.getInstance().removeBookmark(bookmarkNode.getBookmark());
  65                     }
  66                 }
  67         }
  68
  69         public boolean updateSelection(IStructuredSelection selection) {
  70         return isEachSelectionInstanceOf(selection.iterator(), BookmarkNode.class) ||
  71                         isEachSelectionInstanceOf(selection.iterator(), QueryNode.class);
  72         }
  73
  74         /**
  75          * @param selection
  76          * @param enabled
  77          * @param selectionClass
  78          * @return
  79          */
  80         private boolean isEachSelectionInstanceOf(Iterator selection, Class selectionClass) {
  81                 boolean result = true;
  82                 for (Iterator i = selection; result && i.hasNext(); ) {
  83             result &= (selectionClass.isInstance(i.next()));
  84         }
  85                 return result;
  86         }
  87
  88 }