### Eclipse Workspace Patch 1.0
#P org.eclipse.compare
Index: plugin.properties
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.compare/plugins/org.eclipse.compare/plugin.properties,v
retrieving revision 1.93.2.1
diff -u -r1.93.2.1 plugin.properties
--- plugin.properties	4 Mar 2009 09:15:40 -0000	1.93.2.1
+++ plugin.properties	8 Mar 2009 22:14:59 -0000
@@ -91,6 +91,9 @@
 CompareWithHistoryAction.label= &Local History...
 CompareWithHistoryAction.tooltip= Compare the Selected Resource with Local History
 
+CreateLocalPatch.label= &Create Patch...
+CreateLocalPatch.tooltip= Create Patch from the Selected Resource
+
 ReplaceWithMenu.label= Rep&lace With
 
 ReplaceFromHistoryAction.label= &Local History...
Index: plugin.xml
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.compare/plugins/org.eclipse.compare/plugin.xml,v
retrieving revision 1.68.2.1
diff -u -r1.68.2.1 plugin.xml
--- plugin.xml	4 Mar 2009 09:15:40 -0000	1.68.2.1
+++ plugin.xml	8 Mar 2009 22:14:59 -0000
@@ -192,6 +192,9 @@
                id="compareWithMenu">
             <separator
                   name="compareWithGroup">
+	    </separator>
+            <separator
+                  name="localPatchGroup">
             </separator>
          </menu>
       </objectContribution>
@@ -280,6 +283,26 @@
                id="addFromHistoryAction">
          </action>
       </objectContribution>
+      <objectContribution
+            adaptable="true"
+            id="org.eclipse.compare.GenerateDiffAction"
+            objectClass="org.eclipse.core.resources.IResource">
+         <action
+         	   label="%CreateLocalPatch.label"	
+         	   tooltip="%CreateLocalPatch.tooltip"
+               class="org.eclipse.compare.internal.GenerateDiffAction"
+               enablesFor="2"
+               id="generateDiff"
+               menubarPath="compareWithMenu/localPatchGroup">
+         </action>
+         <menu
+               id="creatLocalPatch"
+               label="%CreateLocalPatch.label">
+            <separator
+                  name="org.eclipse.compare.generateDiffSeparator">
+            </separator>
+         </menu>
+      </objectContribution>
    </extension>
    
    <extension
Index: compare/org/eclipse/compare/internal/GenerateDiffAction.java
===================================================================
RCS file: compare/org/eclipse/compare/internal/GenerateDiffAction.java
diff -N compare/org/eclipse/compare/internal/GenerateDiffAction.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ compare/org/eclipse/compare/internal/GenerateDiffAction.java	1 Jan 1970 00:00:00 -0000
@@ -0,0 +1,178 @@
+/*******************************************************************************
+ * Copyright (c) 2008 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Krzysztof Poglodzinski (intuicje@gmail.com) - initial API and implementation
+ *     Mariusz Tanski (mariusztanski@gmail.com) - initial API and implementation
+ *     Kacper Zdanowicz (kacper.zdanowicz@gmail.com) - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.compare.internal;
+
+
+import java.io.InputStream;
+
+import org.eclipse.compare.CompareConfiguration;
+import org.eclipse.compare.contentmergeviewer.ITokenComparator;
+import org.eclipse.compare.contentmergeviewer.TokenComparator;
+import org.eclipse.compare.internal.merge.DocumentMerger;
+import org.eclipse.compare.internal.merge.DocumentMerger.IDocumentMergerInput;
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.jface.action.IAction;
+import org.eclipse.jface.text.Document;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.Position;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.ui.IObjectActionDelegate;
+import org.eclipse.ui.IWorkbenchPage;
+import org.eclipse.ui.IWorkbenchPart;
+
+
+/*
+ * The "Generate diff" action
+ */
+public class GenerateDiffAction extends BaseCompareAction implements IObjectActionDelegate {
+
+	protected ResourceCompareInput fInput;
+	protected IWorkbenchPage fWorkbenchPage;
+	protected boolean showSelectAncestorDialog = true;
+	
+	public void run(ISelection selection) {
+		
+		IResource[] ir = Utilities.getResources(selection);
+		Shell shell = fWorkbenchPage.getWorkbenchWindow().getShell();
+		boolean ok = fInput.setSelection(selection,shell, showSelectAncestorDialog);
+		if (!ok) return;
+
+		DocumentMerger merger = null;
+		if(ir[0] instanceof IFile && ir[1] instanceof IFile) {
+			merger = createDocumentMerger((IFile)ir[0], (IFile)ir[1]);
+			merger.getCompareConfiguration().setLeftLabel(ir[0].getFullPath().toString());
+			merger.getCompareConfiguration().setRightLabel(ir[1].getFullPath().toString());
+			GenerateDiffFileWizard.run(merger, shell, true);
+		}
+		
+
+	}
+
+	protected boolean isEnabled(ISelection selection) {
+		if (fInput == null) {
+			CompareConfiguration cc= new CompareConfiguration();
+			cc.setProperty(CompareEditor.CONFIRM_SAVE_PROPERTY, new Boolean(false));											
+			fInput= new ResourceCompareInput(cc);
+		}
+		return fInput.isEnabled(selection);
+	}
+
+	public void setActivePart(IAction action, IWorkbenchPart targetPart) {
+		fWorkbenchPage= targetPart.getSite().getPage();
+	}
+	
+	private DocumentMerger createDocumentMerger(IFile leftFile, IFile rightFile){
+		IDocument leftDoc = convertFileToDocument(leftFile);
+		IDocument rightDoc = convertFileToDocument(rightFile);
+        if (leftDoc == null) {
+            leftDoc = new Document();
+        }
+        if (rightDoc == null) {
+            rightDoc = new Document();
+        }
+		DocumentMerger docMerger;
+		docMerger = new DocumentMerger(new LocalDiffMergerInput(leftDoc, rightDoc));
+		try {
+			docMerger.doDiff();
+		} catch (Exception e) {
+			throw new RuntimeException(e);
+		}
+		return docMerger;
+	}
+
+	private IDocument convertFileToDocument(IFile file) {
+		if(file == null)
+			return null;
+		StringBuffer str = new StringBuffer();
+		int c;
+		try{
+			InputStream inputStream = file.getContents();
+			while ((c = inputStream.read())!=-1){
+				str.append((char)c);
+			}
+			inputStream.close();
+			return new Document(str.toString());
+		}catch(Exception ex){
+			CompareUIPlugin.log(ex);
+		}
+	
+		return null;
+	}
+
+	private class LocalDiffMergerInput implements IDocumentMergerInput {
+		        
+			private IDocument leftDoc;
+			private IDocument rightDoc;
+			
+			public LocalDiffMergerInput(IDocument leftDoc, IDocument rightDoc) {
+				this.leftDoc = leftDoc ;
+				this.rightDoc= rightDoc;
+			}
+				
+			public ITokenComparator createTokenComparator(String line) {
+		            return new TokenComparator(line);
+		    }
+		    public CompareConfiguration getCompareConfiguration() {
+		            return fInput.getCompareConfiguration();
+		    }
+		    public IDocument getDocument(char contributor) {
+		            switch (contributor) {
+		            case MergeViewerContentProvider.LEFT_CONTRIBUTOR:
+		                    return leftDoc;
+		            case MergeViewerContentProvider.RIGHT_CONTRIBUTOR:
+		                    return rightDoc;
+		            case MergeViewerContentProvider.ANCESTOR_CONTRIBUTOR: 
+		                    return null;
+		            }
+		            return null;
+		    }
+		    public int getHunkStart() {
+		            return 0;
+		    }
+		    public Position getRegion(char contributor) {
+		            switch (contributor) {
+		            case MergeViewerContentProvider.LEFT_CONTRIBUTOR:
+		                    return new Position(0, leftDoc.getLength());
+		            case MergeViewerContentProvider.RIGHT_CONTRIBUTOR:
+		                    return new Position(0, rightDoc.getLength());
+		            case MergeViewerContentProvider.ANCESTOR_CONTRIBUTOR:
+		                    return new Position(0, 0);
+		            }
+		            return null;
+		    }
+		    public boolean isHunkOnLeft() {
+		    	return false;
+		    }
+		    public boolean isIgnoreAncestor() {
+		    	return true;
+		    }
+		    public boolean isPatchHunk() {
+		    	return false;
+		    }
+		
+		    public boolean isShowPseudoConflicts() {
+		    	return false;
+		    }
+		    public boolean isThreeWay() {
+		    	return false;
+		    }
+		    public boolean isPatchHunkOk() {
+		    	return false;
+		    }
+		    
+	}
+	
+}
+