org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/util/ExternalEditorInputFactory.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2008 Wind River Systems, Inc. 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  *     Anton Leherbauer (Wind River Systems) - initial API and implementation
  10  *******************************************************************************/
  11 package org.eclipse.cdt.internal.ui.util;
  12
  13 import org.eclipse.core.resources.IProject;
  14 import org.eclipse.core.resources.ResourcesPlugin;
  15 import org.eclipse.core.runtime.IAdaptable;
  16 import org.eclipse.core.runtime.IPath;
  17 import org.eclipse.core.runtime.Path;
  18 import org.eclipse.ui.IElementFactory;
  19 import org.eclipse.ui.IMemento;
  20 import org.eclipse.ui.IPersistableElement;
  21
  22 import org.eclipse.cdt.core.model.CoreModel;
  23 import org.eclipse.cdt.core.model.ICProject;
  24 import org.eclipse.cdt.core.model.ITranslationUnit;
  25
  26 /**
  27  * The ExternalEditorInputFactory is used to save and recreate an ExternalEditorInput object.
  28  * As such, it implements the IPersistableElement interface for storage
  29  * and the IElementFactory interface for recreation.
  30  *
  31  * @see IMemento
  32  * @see IPersistableElement
  33  * @see IElementFactory
  34  *
  35  * @since 4.0
  36  */
  37 public class ExternalEditorInputFactory implements IElementFactory {
  38
  39         public static final String ID = "org.eclipse.cdt.ui.ExternalEditorInputFactory"; //$NON-NLS-1$
  40
  41     private static final String TAG_PATH = "path";//$NON-NLS-1$
  42     private static final String TAG_PROJECT = "project";//$NON-NLS-1$
  43
  44         /*
  45          * @see org.eclipse.ui.IElementFactory#createElement(org.eclipse.ui.IMemento)
  46          */
  47         public IAdaptable createElement(IMemento memento) {
  48         // Get the file name.
  49         String fileName = memento.getString(TAG_PATH);
  50         if (fileName == null) {
  51                         return null;
  52                 }
  53
  54         IPath location= new Path(fileName);
  55         ICProject cProject= null;
  56
  57         String projectName= memento.getString(TAG_PROJECT);
  58         if (projectName != null) {
  59                 IProject project= ResourcesPlugin.getWorkspace().getRoot().getProject(projectName);
  60                 if (project.isAccessible() && CoreModel.hasCNature(project)) {
  61                         cProject= CoreModel.getDefault().create(project);
  62                 }
  63         }
  64                 return EditorUtility.getEditorInputForLocation(location, cProject);
  65         }
  66
  67         /**
  68          * Save the element state.
  69          *
  70          * @param memento  the storage
  71          * @param input  the element
  72          */
  73         static void saveState(IMemento memento, ExternalEditorInput input) {
  74                 IPath location= input.getPath();
  75                 if (location != null) {
  76                         memento.putString(TAG_PATH, location.toOSString());
  77                 }
  78                 IProject project= null;
  79                 ITranslationUnit unit= input.getTranslationUnit();
  80                 if (unit != null) {
  81                         project= unit.getCProject().getProject();
  82                 }
  83                 if (project == null && input.getMarkerResource() instanceof IProject) {
  84                         project= (IProject)input.getMarkerResource();
  85                 }
  86                 if (project != null) {
  87                         memento.putString(TAG_PROJECT, project.getName());
  88                 }
  89         }
  90
  91 }