private int originalLength;

	private void setDocumentLength(Object element) {
		IDocument doc = getDocument(element);
		originalLength = doc.getLength();
	}
	/*
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#connect(java.lang.Object)
	 */
	@Override
	public void connect(Object element) throws CoreException {
		super.connect(element);
		setDocumentLength(element);
	}
	
	/*
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#canSaveDocument(java.lang.Object)
	 */
	@Override
	public boolean canSaveDocument(Object element) {
		if (element instanceof FileStoreEditorInput) {
			FileStoreEditorInput fei = (FileStoreEditorInput)element;
			IDocument doc = getDocument(element);
			if (!super.canSaveDocument(element))
				return false;
			if (doc.getLength() != originalLength)
				return true;
			URI uri = fei.getURI();
			File f = URIUtil.toFile(uri);
			try {
				BufferedReader input = new BufferedReader(new FileReader(f));
				boolean finished = false;
				char[] buffer = new char[100];
				int curoffset = 0;
				while (!finished) {
					int len = input.read(buffer);
					if (len <= 0)
						break;
					String origbytes = new String(buffer, 0, len);
					String curbytes = doc.get(curoffset, len);
					if (!curbytes.equals(origbytes))
						return true;
					curoffset += len;
				}
				resetDocument(element);
				return false;
			} catch (Exception e) {
				return true;
			}
		}
		return super.canSaveDocument(element);
	}
	/*
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#createSaveOperation(java.lang.Object, org.eclipse.jface.text.IDocument, boolean)
	 */
	@Override
	protected DocumentProviderOperation createSaveOperation(final Object element, final IDocument document, final boolean overwrite) throws CoreException {
		final DocumentProviderOperation saveOperation = super.createSaveOperation(element, document, overwrite);
		if (element instanceof IURIEditorInput) {
			return new DocumentProviderOperation() {
				/*
				 * @see org.eclipse.ui.editors.text.TextFileDocumentProvider.DocumentProviderOperation#execute(org.eclipse.core.runtime.IProgressMonitor)
				 */
				@Override
				public void execute(IProgressMonitor monitor) throws CoreException {
				}

				/*
				 * @see org.eclipse.jface.operation.IRunnableWithProgress#run(org.eclipse.core.runtime.IProgressMonitor)
				 */
				@Override
				public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
					saveOperation.run(monitor);
					// Here's where we sneak in resetting the original document length
					setDocumentLength(element);
				}

				/*
				 * @see org.eclipse.ui.editors.text.TextFileDocumentProvider.DocumentProviderOperation#getSchedulingRule()
				 */
				@Override
				public ISchedulingRule getSchedulingRule() {
					return saveOperation.getSchedulingRule();
				}
			};
		}
		return saveOperation;
	}