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 org.eclipse.jface.text.Assert;
  24 import org.eclipse.ui.IEditorInput;
  25
  26
  27 /**
  28  * This working copy manager works together with a given compilation unit document provider and
  29  * additionally offers to "overwrite" the working copy provided by this document provider.
  30  */
  31 public class WorkingCopyManager implements IWorkingCopyManager, IWorkingCopyManagerExtension {
  32
  33         private ICompilationUnitDocumentProvider fDocumentProvider;
  34         private Map fMap;
  35         private boolean fIsShuttingDown;
  36
  37         /**
  38          * Creates a new working copy manager that co-operates with the given
  39          * compilation unit document provider.
  40          *
  41          * @param provider the provider
  42          */
  43         public WorkingCopyManager(ICompilationUnitDocumentProvider provider) {
  44                 Assert.isNotNull(provider);
  45                 fDocumentProvider= provider;
  46         }
  47
  48         /*
  49          * @see net.sourceforge.phpdt.ui.IWorkingCopyManager#connect(org.eclipse.ui.IEditorInput)
  50          */
  51         public void connect(IEditorInput input) throws CoreException {
  52                 fDocumentProvider.connect(input);
  53         }
  54
  55         /*
  56          * @see net.sourceforge.phpdt.ui.IWorkingCopyManager#disconnect(org.eclipse.ui.IEditorInput)
  57          */
  58         public void disconnect(IEditorInput input) {
  59                 fDocumentProvider.disconnect(input);
  60         }
  61
  62         /*
  63          * @see net.sourceforge.phpdt.ui.IWorkingCopyManager#shutdown()
  64          */
  65         public void shutdown() {
  66                 if (!fIsShuttingDown) {
  67                         fIsShuttingDown= true;
  68                         try {
  69                                 if (fMap != null) {
  70                                         fMap.clear();
  71                                         fMap= null;
  72                                 }
  73                                 fDocumentProvider.shutdown();
  74                         } finally {
  75                                 fIsShuttingDown= false;
  76                         }
  77                 }
  78         }
  79
  80         /*
  81          * @see net.sourceforge.phpdt.ui.IWorkingCopyManager#getWorkingCopy(org.eclipse.ui.IEditorInput)
  82          */
  83         public ICompilationUnit getWorkingCopy(IEditorInput input) {
  84                 ICompilationUnit unit= fMap == null ? null : (ICompilationUnit) fMap.get(input);
  85                 return unit != null ? unit : fDocumentProvider.getWorkingCopy(input);
  86         }
  87
  88         /*
  89          * @see net.sourceforge.phpdt.internal.ui.javaeditor.IWorkingCopyManagerExtension#setWorkingCopy(org.eclipse.ui.IEditorInput, net.sourceforge.phpdt.core.ICompilationUnit)
  90          */
  91         public void setWorkingCopy(IEditorInput input, ICompilationUnit workingCopy) {
  92                 if (fDocumentProvider.getDocument(input) != null) {
  93                         if (fMap == null)
  94                                 fMap= new HashMap();
  95                         fMap.put(input, workingCopy);
  96                 }
  97         }
  98         /*
  99          * @see net.sourceforge.phpdt.internal.ui.javaeditor.IWorkingCopyManagerExtension#removeWorkingCopy(org.eclipse.ui.IEditorInput)
 100          */
 101         public void removeWorkingCopy(IEditorInput input) {
 102                 fMap.remove(input);
 103                 if (fMap.isEmpty())
 104                         fMap= null;
 105         }
 106 }