net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/WorkingCopyManager.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11
  12 package net.sourceforge.phpeclipse.phpeditor;
  13
  14
  15 import java.util.HashMap;
  16 import java.util.Map;
  17
  18 import net.sourceforge.phpdt.core.ICompilationUnit;
  19 import net.sourceforge.phpdt.ui.IWorkingCopyManager;
  20 import net.sourceforge.phpdt.ui.IWorkingCopyManagerExtension;
  21
  22 import org.eclipse.core.runtime.CoreException;
  23 import net.sourceforge.phpeclipse.phpeditor.ICompilationUnitDocumentProvider;
  24 import org.eclipse.jface.text.Assert;
  25 import org.eclipse.ui.IEditorInput;
  26
  27
  28 /**
  29  * This working copy manager works together with a given compilation unit document provider and
  30  * additionally offers to "overwrite" the working copy provided by this document provider.
  31  */
  32 public class WorkingCopyManager implements IWorkingCopyManager, IWorkingCopyManagerExtension {
  33
  34         private ICompilationUnitDocumentProvider fDocumentProvider;
  35         private Map fMap;
  36         private boolean fIsShuttingDown;
  37
  38         /**
  39          * Creates a new working copy manager that co-operates with the given
  40          * compilation unit document provider.
  41          *
  42          * @param provider the provider
  43          */
  44         public WorkingCopyManager(ICompilationUnitDocumentProvider provider) {
  45                 Assert.isNotNull(provider);
  46                 fDocumentProvider= provider;
  47         }
  48
  49         /*
  50          * @see org.eclipse.jdt.ui.IWorkingCopyManager#connect(org.eclipse.ui.IEditorInput)
  51          */
  52         public void connect(IEditorInput input) throws CoreException {
  53                 fDocumentProvider.connect(input);
  54         }
  55
  56         /*
  57          * @see org.eclipse.jdt.ui.IWorkingCopyManager#disconnect(org.eclipse.ui.IEditorInput)
  58          */
  59         public void disconnect(IEditorInput input) {
  60                 fDocumentProvider.disconnect(input);
  61         }
  62
  63         /*
  64          * @see org.eclipse.jdt.ui.IWorkingCopyManager#shutdown()
  65          */
  66         public void shutdown() {
  67                 if (!fIsShuttingDown) {
  68                         fIsShuttingDown= true;
  69                         try {
  70                                 if (fMap != null) {
  71                                         fMap.clear();
  72                                         fMap= null;
  73                                 }
  74                                 fDocumentProvider.shutdown();
  75                         } finally {
  76                                 fIsShuttingDown= false;
  77                         }
  78                 }
  79         }
  80
  81         /*
  82          * @see org.eclipse.jdt.ui.IWorkingCopyManager#getWorkingCopy(org.eclipse.ui.IEditorInput)
  83          */
  84         public ICompilationUnit getWorkingCopy(IEditorInput input) {
  85                 ICompilationUnit unit= fMap == null ? null : (ICompilationUnit) fMap.get(input);
  86                 return unit != null ? unit : fDocumentProvider.getWorkingCopy(input);
  87         }
  88
  89         /*
  90          * @see org.eclipse.jdt.internal.ui.javaeditor.IWorkingCopyManagerExtension#setWorkingCopy(org.eclipse.ui.IEditorInput, org.eclipse.jdt.core.ICompilationUnit)
  91          */
  92         public void setWorkingCopy(IEditorInput input, ICompilationUnit workingCopy) {
  93                 if (fDocumentProvider.getDocument(input) != null) {
  94                         if (fMap == null)
  95                                 fMap= new HashMap();
  96                         fMap.put(input, workingCopy);
  97                 }
  98         }
  99         /*
 100          * @see org.eclipse.jdt.internal.ui.javaeditor.IWorkingCopyManagerExtension#removeWorkingCopy(org.eclipse.ui.IEditorInput)
 101          */
 102         public void removeWorkingCopy(IEditorInput input) {
 103                 fMap.remove(input);
 104                 if (fMap.isEmpty())
 105                         fMap= null;
 106         }
 107 }