net.sourceforge.phpeclipse.ui/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 import java.util.HashMap;
  15 import java.util.Map;
  16
  17 import net.sourceforge.phpdt.core.ICompilationUnit;
  18 import net.sourceforge.phpdt.ui.IWorkingCopyManager;
  19 import net.sourceforge.phpdt.ui.IWorkingCopyManagerExtension;
  20
  21 import org.eclipse.core.runtime.CoreException;
  22 import org.eclipse.jface.text.Assert;
  23 import org.eclipse.ui.IEditorInput;
  24
  25 /**
  26  * This working copy manager works together with a given compilation unit
  27  * document provider and additionally offers to "overwrite" the working copy
  28  * provided by this document provider.
  29  */
  30 public class WorkingCopyManager implements IWorkingCopyManager,
  31                 IWorkingCopyManagerExtension {
  32
  33         private ICompilationUnitDocumentProvider fDocumentProvider;
  34
  35         private Map fMap;
  36
  37         private boolean fIsShuttingDown;
  38
  39         /**
  40          * Creates a new working copy manager that co-operates with the given
  41          * compilation unit document provider.
  42          *
  43          * @param provider
  44          *            the provider
  45          */
  46         public WorkingCopyManager(ICompilationUnitDocumentProvider provider) {
  47                 Assert.isNotNull(provider);
  48                 fDocumentProvider = provider;
  49         }
  50
  51         /*
  52          * @see net.sourceforge.phpdt.ui.IWorkingCopyManager#connect(org.eclipse.ui.IEditorInput)
  53          */
  54         public void connect(IEditorInput input) throws CoreException {
  55                 fDocumentProvider.connect(input);
  56         }
  57
  58         /*
  59          * @see net.sourceforge.phpdt.ui.IWorkingCopyManager#disconnect(org.eclipse.ui.IEditorInput)
  60          */
  61         public void disconnect(IEditorInput input) {
  62                 fDocumentProvider.disconnect(input);
  63         }
  64
  65         /*
  66          * @see net.sourceforge.phpdt.ui.IWorkingCopyManager#shutdown()
  67          */
  68         public void shutdown() {
  69                 if (!fIsShuttingDown) {
  70                         fIsShuttingDown = true;
  71                         try {
  72                                 if (fMap != null) {
  73                                         fMap.clear();
  74                                         fMap = null;
  75                                 }
  76                                 fDocumentProvider.shutdown();
  77                         } finally {
  78                                 fIsShuttingDown = false;
  79                         }
  80                 }
  81         }
  82
  83         /*
  84          * @see net.sourceforge.phpdt.ui.IWorkingCopyManager#getWorkingCopy(org.eclipse.ui.IEditorInput)
  85          */
  86         public ICompilationUnit getWorkingCopy(IEditorInput input) {
  87                 ICompilationUnit unit = fMap == null ? null : (ICompilationUnit) fMap
  88                                 .get(input);
  89                 return unit != null ? unit : fDocumentProvider.getWorkingCopy(input);
  90         }
  91
  92         /*
  93          * @see net.sourceforge.phpdt.internal.ui.javaeditor.IWorkingCopyManagerExtension#setWorkingCopy(org.eclipse.ui.IEditorInput,
  94          *      net.sourceforge.phpdt.core.ICompilationUnit)
  95          */
  96         public void setWorkingCopy(IEditorInput input, ICompilationUnit workingCopy) {
  97                 if (fDocumentProvider.getDocument(input) != null) {
  98                         if (fMap == null)
  99                                 fMap = new HashMap();
 100                         fMap.put(input, workingCopy);
 101                 }
 102         }
 103
 104         /*
 105          * @see net.sourceforge.phpdt.internal.ui.javaeditor.IWorkingCopyManagerExtension#removeWorkingCopy(org.eclipse.ui.IEditorInput)
 106          */
 107         public void removeWorkingCopy(IEditorInput input) {
 108                 fMap.remove(input);
 109                 if (fMap.isEmpty())
 110                         fMap = null;
 111         }
 112 }