lang-impl/src/com/intellij/ide/CopyPasteUtil.java

   1 package com.intellij.ide;
   2
   3 import com.intellij.ide.util.treeView.AbstractTreeUpdater;
   4 import com.intellij.openapi.ide.CopyPasteManager;
   5 import com.intellij.psi.PsiElement;
   6
   7 import java.awt.datatransfer.Transferable;
   8
   9 /**
  10  * @author max
  11  */
  12 public class CopyPasteUtil {
  13   private CopyPasteUtil() { }
  14
  15   public static PsiElement[] getElementsInTransferable(Transferable t) {
  16     final PsiElement[] elts = PsiCopyPasteManager.getElements(t);
  17     return elts != null ? elts : PsiElement.EMPTY_ARRAY;
  18   }
  19
  20   public static class DefaultCopyPasteListener implements CopyPasteManager.ContentChangedListener {
  21     private final AbstractTreeUpdater myUpdater;
  22
  23     public DefaultCopyPasteListener(final AbstractTreeUpdater updater) {
  24       myUpdater = updater;
  25     }
  26
  27     public void contentChanged(final Transferable oldTransferable, final Transferable newTransferable) {
  28       updateByTransferable(oldTransferable);
  29       updateByTransferable(newTransferable);
  30     }
  31
  32     private void updateByTransferable(final Transferable t) {
  33       final PsiElement[] psiElements = CopyPasteUtil.getElementsInTransferable(t);
  34       for (PsiElement psiElement : psiElements) {
  35         myUpdater.addSubtreeToUpdateByElement(psiElement);
  36       }
  37     }
  38   }
  39 }