case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/actions/JDTQuickMenuCreator.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009, 2011 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package org.eclipse.jdt.internal.ui.actions;
  12
  13 import org.eclipse.swt.custom.StyledText;
  14 import org.eclipse.swt.graphics.Point;
  15
  16 import org.eclipse.core.commands.AbstractHandler;
  17 import org.eclipse.core.commands.ExecutionEvent;
  18 import org.eclipse.core.commands.ExecutionException;
  19 import org.eclipse.core.commands.IHandler;
  20
  21 import org.eclipse.jface.text.IRegion;
  22 import org.eclipse.jface.text.ITextViewerExtension5;
  23 import org.eclipse.jface.text.Region;
  24 import org.eclipse.jface.text.source.ISourceViewer;
  25
  26 import org.eclipse.ui.actions.QuickMenuCreator;
  27
  28 import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
  29
  30 /**
  31  * Java editor aware quick menu creator. In the given editor, the menu will be aligned with the word
  32  * at the current offset.
  33  *
  34  * @since 3.5
  35  */
  36 public abstract class JDTQuickMenuCreator extends QuickMenuCreator {
  37
  38         public final JavaEditor fEditor;
  39
  40         /**
  41          * Create a JDT quick menu creator
  42          * @param editor a Java editor, or <code>null</code> if none
  43          */
  44         public JDTQuickMenuCreator(JavaEditor editor) {
  45                 fEditor= editor;
  46         }
  47
  48         @Override
  49         protected Point computeMenuLocation(StyledText text) {
  50                 if (fEditor == null || text != fEditor.getViewer().getTextWidget())
  51                         return super.computeMenuLocation(text);
  52                 return computeWordStart();
  53         }
  54
  55         private Point computeWordStart() {
  56                 return fEditor.generated_7893933557945652389(this);
  57         }
  58
  59         public IRegion modelRange2WidgetRange(IRegion region) {
  60                 ISourceViewer viewer= fEditor.getViewer();
  61                 if (viewer instanceof ITextViewerExtension5) {
  62                         ITextViewerExtension5 extension= (ITextViewerExtension5)viewer;
  63                         return extension.modelRange2WidgetRange(region);
  64                 }
  65
  66                 IRegion visibleRegion= viewer.getVisibleRegion();
  67                 int start= region.getOffset() - visibleRegion.getOffset();
  68                 int end= start + region.getLength();
  69                 if (end > visibleRegion.getLength())
  70                         end= visibleRegion.getLength();
  71
  72                 return new Region(start, end - start);
  73         }
  74
  75         /**
  76          * Returns a handler that can create and open the quick menu.
  77          *
  78          * @return a handler that can create and open the quick menu
  79          */
  80         public IHandler createHandler() {
  81                 return new AbstractHandler() {
  82                         public Object execute(ExecutionEvent event) throws ExecutionException {
  83                                 createMenu();
  84                                 return null;
  85                         }
  86                 };
  87         }
  88
  89 }