PatchFileTypedElement


1   /*******************************************************************************
2    * Copyright (c) 2006, 2007 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.compare.internal.patch;
12  
13  import java.io.*;
14  import java.util.List  ;
15  
16  import org.eclipse.compare.*;
17  import org.eclipse.compare.internal.CompareUIPlugin;
18  import org.eclipse.core.resources.*;
19  import org.eclipse.core.runtime.CoreException;
20  import org.eclipse.jface.resource.LocalResourceManager;
21  import org.eclipse.swt.graphics.Image;
22  
23  public class PatchFileTypedElement implements ITypedElement, IEncodedStreamContentAccessor {
24  
25      private final FileDiffResult result;
26      private final boolean isAfterState;
27  
28      public PatchFileTypedElement(FileDiffResult result, boolean isAfterState) {
29          this.result = result;
30          this.isAfterState = isAfterState;
31      }
32  
33      public Image getImage() {
34          IFile file = getPatcher().getTargetFile(result.getDiff());
35          if (file == null) {
36              // We don't get a target file if the file doesn't exist
37              DiffProject project = result.getDiff().getProject();
38              if (project != null) {
39                  file = project.getFile(result.getDiff().getPath(result.getConfiguration().isReversed()));
40              } else {
41                  IResource target = getPatcher().getTarget();
42                  if (target instanceof IFile) {
43                      file =  (IFile) target;
44                  } else if (target instanceof IContainer) {
45                      IContainer container = (IContainer) target;
46                      file = container.getFile(result.getTargetPath());
47                  }
48              }
49          }
50          Image image = null;
51          if (file != null) {
52              image = CompareUI.getImage(file);
53          }
54          if (result.containsProblems()) {
55              LocalResourceManager imageCache = PatchCompareEditorInput.getImageCache(result.getConfiguration());
56              image = HunkTypedElement.getHunkErrorImage(image, imageCache, true);
57          }
58          return image;
59      }
60  
61      /* (non-Javadoc)
62       * @see org.eclipse.compare.ITypedElement#getName()
63       */
64      public String   getName() {
65          return result.getTargetPath().toString();
66      }
67  
68      /* (non-Javadoc)
69       * @see org.eclipse.compare.ITypedElement#getType()
70       */
71      public String   getType() {
72          return result.getTargetPath().getFileExtension();
73      }
74  
75      public String   getCharset() throws CoreException {
76          // TODO Auto-generated method stub
77          return null;
78      }
79  
80      public InputStream getContents() throws CoreException {
81          // If there are cached contents, use them
82          if (isAfterState && getPatcher().hasCachedContents(result.getDiff()))
83              return new ByteArrayInputStream(getPatcher().getCachedContents(result.getDiff()));
84          // Otherwise, get the lines from the diff result
85          List   lines;
86          if (isAfterState) {
87              lines = result.getAfterLines();
88          } else {
89              lines = result.getBeforeLines();
90          }
91          String   contents = Patcher.createString(getPatcher().isPreserveLineDelimeters(), lines);
92          String   charSet = getCharset();
93          byte[] bytes = null;
94          if (charSet != null) {
95              try {
96                  bytes = contents.getBytes(charSet);
97              } catch (UnsupportedEncodingException e) {
98                  CompareUIPlugin.log(e);
99              }
100         }
101         if (bytes == null) {
102             bytes = contents.getBytes();
103         }
104         return new ByteArrayInputStream(bytes);
105     }
106 
107     private Patcher getPatcher() {
108         return Patcher.getPatcher(result.getConfiguration());
109     }
110 
111 }
112
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