org.eclipse.ui.IEditorDescriptor Java Examples

public IEditorPart openAndSelect(IWorkbenchPage wbPage, IFile file, int offset, int length, boolean activate) throws PartInitException {
	String editorId= null;
	IEditorDescriptor desc= IDE.getEditorDescriptor(file);
	if (desc == null || !desc.isInternal()) {
		editorId= "org.eclipse.ui.DefaultTextEditor"; //$NON-NLS-1$
	} else {
		editorId= desc.getId();
	}

	IEditorPart editor;
	if (NewSearchUI.reuseEditor()) {
		editor= showWithReuse(file, wbPage, editorId, activate);
	} else {
		editor= showWithoutReuse(file, wbPage, editorId, activate);
	}

	if (editor instanceof ITextEditor) {
		ITextEditor textEditor= (ITextEditor) editor;
		textEditor.selectAndReveal(offset, length);
	} else if (editor != null) {
		showWithMarker(editor, file, offset, length);
	}
	return editor;
}
 

private void initializeTitle(IEditorInput input) {

		Image oldImage = fTitleImage;
		fTitleImage = null;
		String title = ""; //$NON-NLS-1$

		if (input != null) {
			IEditorRegistry editorRegistry = PlatformUI.getWorkbench()
					.getEditorRegistry();
			IEditorDescriptor editorDesc = editorRegistry.findEditor(getSite()
					.getId());
			ImageDescriptor imageDesc = editorDesc != null ? editorDesc
					.getImageDescriptor() : null;

			fTitleImage = imageDesc != null ? imageDesc.createImage() : null;
			title = input.getName();
		}

		setTitleImage(fTitleImage);
		setPartName(title);

		firePropertyChange(PROP_DIRTY);

		if (oldImage != null && !oldImage.isDisposed())
			oldImage.dispose();
	}
 

public static void resetDefaultEditor(String extension) {
  EditorRegistry editorRegistry = (EditorRegistry) PlatformUI.getWorkbench().getEditorRegistry();
  IFileEditorMapping[] editorMappings = editorRegistry.getFileEditorMappings();

  // Search the file=>editor mappings for the specified extension
  for (IFileEditorMapping editorMapping : editorMappings) {
    if (extension.equals(editorMapping.getExtension())) {
      FileEditorMapping internalMapping = (FileEditorMapping) editorMapping;
      // Only need to do anything if there's an explicit default set
      if (internalMapping.getDeclaredDefaultEditors().length > 0) {
        // Clear any default editor associations for this extension

        List<IEditorDescriptor> list = new ArrayList<IEditorDescriptor>();
        internalMapping.setDefaultEditors(list);

        // Save the updated editor registry to disk
        editorRegistry.saveAssociations();

        // TODO: remove
        GWTPluginLog.logInfo("Reset default editor for extension: "
            + extension);
      }
      break;
    }
  }
}
 

private String getEditorId(IFileStore file) {
	IWorkbench workbench = PlatformUI.getWorkbench();
	IEditorRegistry editorRegistry= workbench.getEditorRegistry();
	IEditorDescriptor descriptor= editorRegistry.getDefaultEditor(file.getName(), getContentType(file));

	// check the OS for in-place editor (OLE on Win32)
	if (descriptor == null && editorRegistry.isSystemInPlaceEditorAvailable(file.getName()))
		descriptor= editorRegistry.findEditor(IEditorRegistry.SYSTEM_INPLACE_EDITOR_ID);
	
	// check the OS for external editor
	if (descriptor == null && editorRegistry.isSystemExternalEditorAvailable(file.getName()))
		descriptor= editorRegistry.findEditor(IEditorRegistry.SYSTEM_EXTERNAL_EDITOR_ID);
	
	if (descriptor != null)
		return descriptor.getId();
	
	return EditorsUI.DEFAULT_TEXT_EDITOR_ID;
}
 

/**
 * Opens a subdiagram for a given {@link Diagram}
 */
public static IEditorPart openEditor(Diagram diagramToOpen) {
	IFile file = WorkspaceSynchronizer.getFile(diagramToOpen.eResource());
	try {
		IEditorDescriptor desc = PlatformUI.getWorkbench().getEditorRegistry().getDefaultEditor(file.getName());
		final IWorkbenchPage wbPage = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
		if (diagramToOpen.getElement() instanceof Statechart) {
			return wbPage.openEditor(new FileEditorInput(file), desc.getId());
		} else if (diagramToOpen.getElement() instanceof State) {
			return wbPage.openEditor(new DiagramEditorInput(diagramToOpen), desc.getId());
		}
	} catch (PartInitException e) {
		e.printStackTrace();
	}
	return null;
}
 

/**
 * Open a file in an editor and return the opened editor part.<br>
 * This method will try to open the file in an internal editor, unless there is no editor descriptor assigned to
 * that file type.
 * 
 * @param file
 * @return The {@link IEditorPart} that was created when the file was opened; Return null in case of an error
 */
public static IEditorPart openInEditor(File file)
{
	// NOTE: Moved from PHP's EditorUtils
	if (file == null)
	{
		IdeLog.logError(CommonEditorPlugin.getDefault(),
				"Error open a file in the editor", new IllegalArgumentException("file is null")); //$NON-NLS-1$ //$NON-NLS-2$
		return null;
	}
	try
	{
		URI uri = file.toURI();
		IEditorDescriptor desc = getEditorDescriptor(uri);
		String editorId = (desc == null) ? IEditorRegistry.SYSTEM_EXTERNAL_EDITOR_ID : desc.getId();
		IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();

		return IDE.openEditor(page, uri, editorId, true);
	}
	catch (Exception e)
	{
		IdeLog.logError(CommonEditorPlugin.getDefault(), "Error open a file in the editor", e); //$NON-NLS-1$
	}
	return null;
}
 

@Override
public void init(IEditorSite site, IEditorInput input) throws PartInitException {
	setSite(site);
	setInput(input);
	setPartName(input.getName());
	
	Image oldTitleImage = titleImage;
	if (input != null) {
		IEditorRegistry editorRegistry = PlatformUI.getWorkbench().getEditorRegistry();
		IEditorDescriptor editorDesc = editorRegistry.findEditor(getSite().getId());
		ImageDescriptor imageDesc = editorDesc != null ? editorDesc.getImageDescriptor() : null;
		titleImage = imageDesc != null ? imageDesc.createImage() : null;
	}

	setTitleImage(titleImage);
	if (oldTitleImage != null && !oldTitleImage.isDisposed()) {
		oldTitleImage.dispose();
	}

	FileEditorInput fileInput = (FileEditorInput) input;
	htmlUrl = fileInput.getFile().getLocation().toOSString();
}
 

/**
 * 启动编辑器。
 * 
 * @param site
 *            the site
 * @param input
 *            the input
 * @throws PartInitException
 *             the part init exception
 * @see org.eclipse.ui.part.EditorPart#init(org.eclipse.ui.IEditorSite,
 *      org.eclipse.ui.IEditorInput)
 */
public void init(IEditorSite site, IEditorInput input) throws PartInitException {
	if (LOGGER.isDebugEnabled()) {
		LOGGER.debug("init(IEditorSite site, IEditorInput input)");
	}
	setSite(site);
	setInput(input);
	// 设置Editor标题栏的显示名称，否则名称用plugin.xml中的name属性
	setPartName(input.getName());

	Image oldTitleImage = titleImage;
	if (input != null) {
		IEditorRegistry editorRegistry = PlatformUI.getWorkbench().getEditorRegistry();
		IEditorDescriptor editorDesc = editorRegistry.findEditor(getSite().getId());
		ImageDescriptor imageDesc = editorDesc != null ? editorDesc.getImageDescriptor() : null;
		titleImage = imageDesc != null ? imageDesc.createImage() : null;
	}

	setTitleImage(titleImage);
	if (oldTitleImage != null && !oldTitleImage.isDisposed()) {
		oldTitleImage.dispose();
	}

	getSite().setSelectionProvider(this);
}
 

private void initializeTitle(final IEditorInput input) {

        final Image oldImage = fTitleImage;
        fTitleImage = null;
        String title = ""; //$NON-NLS-1$

        if (input != null) {
            final IEditorRegistry editorRegistry = PlatformUI.getWorkbench().getEditorRegistry();
            final IEditorDescriptor editorDesc = editorRegistry.findEditor(getSite().getId());
            final ImageDescriptor imageDesc = editorDesc != null ? editorDesc.getImageDescriptor() : null;

            fTitleImage = imageDesc != null ? imageDesc.createImage() : null;
            title = input.getName();
        }

        setTitleImage(fTitleImage);
        setPartName(title);

        firePropertyChange(PROP_DIRTY);

        if (oldImage != null && !oldImage.isDisposed())
            oldImage.dispose();
    }
 

protected void showMatch( Match match, int currentOffset
                        , int currentLength, boolean activate 
                        ) throws PartInitException 
{
    if (match instanceof ModulaSymbolMatch) {
        try {
            ModulaSymbolMatch em = (ModulaSymbolMatch)match;
            IFile f = em.getFile();
            IWorkbenchPage page = WorkbenchUtils.getActivePage();
            IEditorDescriptor desc = PlatformUI.getWorkbench().getEditorRegistry().getDefaultEditor(f.getName());
            IEditorPart ep = page.openEditor(new FileEditorInput(f), desc.getId());
            ITextEditor te = (ITextEditor)ep;
            Control ctr = (Control)te.getAdapter(Control.class);
            ctr.setFocus();
            te.selectAndReveal(em.getOffset(), em.getLength());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
 

@Override
public boolean collectSourceFileOpeners(IEditorPart editor, IAcceptor<FileOpener> acceptor) {
	if (!(editor instanceof XtextEditor) && editor.getEditorInput() != null) {
		try {
			IClassFile classFile = Adapters.adapt(editor, IClassFile.class);
			if (classFile == null) {
				return false;
			}
			ITrace trace = traceForTypeRootProvider.getTraceToSource(classFile);
			if (trace == null) {
				return false;
			}
			for (ILocationInResource location : trace.getAllAssociatedLocations()) {
				String name = location.getAbsoluteResourceURI().getURI().lastSegment();
				IEditorDescriptor editorDescriptor = IDE.getEditorDescriptor(name);
				acceptor.accept(createEditorOpener(editor.getEditorInput(), editorDescriptor.getId()));
				return true;
			}
		} catch (PartInitException e) {
			LOG.error(e.getMessage(), e);
		}
	}
	return false;
}
 

@Override
public void init(IEditorSite site, IEditorInput input) throws PartInitException {
	setSite(site);
	setInput(input);
	setPartName(input.getName());
	
	Image oldTitleImage = titleImage;
	if (input != null) {
		IEditorRegistry editorRegistry = PlatformUI.getWorkbench().getEditorRegistry();
		IEditorDescriptor editorDesc = editorRegistry.findEditor(getSite().getId());
		ImageDescriptor imageDesc = editorDesc != null ? editorDesc.getImageDescriptor() : null;
		titleImage = imageDesc != null ? imageDesc.createImage() : null;
	}

	setTitleImage(titleImage);
	if (oldTitleImage != null && !oldTitleImage.isDisposed()) {
		oldTitleImage.dispose();
	}

	FileEditorInput fileInput = (FileEditorInput) input;
	htmlUrl = fileInput.getFile().getLocation().toOSString();
}
 

/**
 * 启动编辑器。
 * 
 * @param site
 *            the site
 * @param input
 *            the input
 * @throws PartInitException
 *             the part init exception
 * @see org.eclipse.ui.part.EditorPart#init(org.eclipse.ui.IEditorSite,
 *      org.eclipse.ui.IEditorInput)
 */
public void init(IEditorSite site, IEditorInput input) throws PartInitException {
	if (LOGGER.isDebugEnabled()) {
		LOGGER.debug("init(IEditorSite site, IEditorInput input)");
	}
	setSite(site);
	setInput(input);
	// 设置Editor标题栏的显示名称，否则名称用plugin.xml中的name属性
	setPartName(input.getName());

	Image oldTitleImage = titleImage;
	if (input != null) {
		IEditorRegistry editorRegistry = PlatformUI.getWorkbench().getEditorRegistry();
		IEditorDescriptor editorDesc = editorRegistry.findEditor(getSite().getId());
		ImageDescriptor imageDesc = editorDesc != null ? editorDesc.getImageDescriptor() : null;
		titleImage = imageDesc != null ? imageDesc.createImage() : null;
	}

	setTitleImage(titleImage);
	if (oldTitleImage != null && !oldTitleImage.isDisposed()) {
		oldTitleImage.dispose();
	}

	getSite().setSelectionProvider(this);
}
 

@Override
protected void openFiles(PythonpathZipChildTreeNode[] pythonPathFilesSelected) {
    for (PythonpathZipChildTreeNode n : pythonPathFilesSelected) {
        try {
            if (PythonPathHelper.isValidSourceFile(n.zipPath)) {
                new PyOpenAction().run(new ItemPointer(n.zipStructure.file, new Location(), new Location(), null,
                        n.zipPath));
            } else {
                IEditorRegistry editorReg = PlatformUI.getWorkbench().getEditorRegistry();
                IEditorDescriptor defaultEditor = editorReg.getDefaultEditor(n.zipPath);
                PydevZipFileStorage storage = new PydevZipFileStorage(n.zipStructure.file, n.zipPath);
                PydevZipFileEditorInput input = new PydevZipFileEditorInput(storage);

                if (defaultEditor != null) {
                    IDE.openEditor(page, input, defaultEditor.getId());
                } else {
                    IDE.openEditor(page, input, EditorsUI.DEFAULT_TEXT_EDITOR_ID);
                }
            }
        } catch (PartInitException e) {
            Log.log(e);
        }
    }
}
 

public IEditorDescriptor findXbaseEditor(IEditorInput editorInput, boolean ignorePreference) {
	IFile file = ResourceUtil.getFile(editorInput);
	if (file == null)
		return null;
	if (!ignorePreference) {
		if (file.exists()) {
			try {
				String favoriteEditor = file.getPersistentProperty(IDE.EDITOR_KEY);
				if (favoriteEditor != null)
					return null;
			} catch (CoreException e) {
				logger.debug(e.getMessage(), e);
			}
		}
	}
	// TODO stay in same editor if local navigation
	Decision decision = decisions.decideAccordingToCaller();
	if (decision == Decision.FORCE_JAVA) {
		return null;
	}
	IEclipseTrace traceToSource = traceInformation.getTraceToSource(file);
	return getXtextEditor(traceToSource);
}
 

private void updateDefaultEditorMappingIfAbsent() {
	final EditorRegistry registry = (EditorRegistry) WorkbenchPlugin.getDefault().getEditorRegistry();
	for (final IFileEditorMapping editorMapping : registry.getFileEditorMappings()) {
		final IEditorDescriptor defaultEditor = editorMapping.getDefaultEditor();
		if (null == defaultEditor) {

			final String extension = editorMapping.getExtension();
			LOGGER.info("No default editor is associated with files with extension: '." + extension + "'.");
			final IEditorDescriptor defaultTextEditor = registry.findEditor(DEFAULT_TEXT_EDITOR_ID);
			if (null != defaultTextEditor) {
				((FileEditorMapping) editorMapping).setDefaultEditor(defaultTextEditor);
				String editorName = defaultTextEditor.getLabel();
				if (null == editorName) {
					editorName = defaultTextEditor.getId();
				}
				if (null != editorName) {
					LOGGER.info("Associated files with extension " + extension + " with '" + editorName + "'.");
				}
			}
		}
	}
	registry.saveAssociations();
	PrefUtil.savePrefs();
}
 

private String getEditorId( IFileStore file )
{
	IWorkbench workbench = window.getWorkbench( );
	IEditorRegistry editorRegistry = workbench.getEditorRegistry( );
	IEditorDescriptor descriptor = editorRegistry.getDefaultEditor( file.getName( ),
			getContentType( file ) );

	// check the OS for in-place editor (OLE on Win32)
	if ( descriptor == null
			&& editorRegistry.isSystemInPlaceEditorAvailable( file.getName( ) ) )
	{
		descriptor = editorRegistry.findEditor( IEditorRegistry.SYSTEM_INPLACE_EDITOR_ID );
	}

	// check the OS for external editor
	if ( descriptor == null
			&& editorRegistry.isSystemExternalEditorAvailable( file.getName( ) ) )
	{
		descriptor = editorRegistry.findEditor( IEditorRegistry.SYSTEM_EXTERNAL_EDITOR_ID );
	}

	return ( descriptor == null ) ? "" : descriptor.getId( ); //$NON-NLS-1$
}
 

public IEditorPart openAndSelect(IWorkbenchPage wbPage, IFile file, int offset, int length, boolean activate)
        throws PartInitException {
    String editorId = null;
    IEditorDescriptor desc = IDE.getEditorDescriptor(file);
    if (desc == null || !desc.isInternal()) {
        editorId = "org.eclipse.ui.DefaultTextEditor"; //$NON-NLS-1$
    } else {
        editorId = desc.getId();
    }

    IEditorPart editor;
    if (NewSearchUI.reuseEditor()) {
        editor = showWithReuse(file, wbPage, editorId, activate);
    } else {
        editor = showWithoutReuse(file, wbPage, editorId, activate);
    }

    if (editor instanceof ITextEditor) {
        ITextEditor textEditor = (ITextEditor) editor;
        textEditor.selectAndReveal(offset, length);
    } else if (editor != null) {
        showWithMarker(editor, file, offset, length);
    }
    return editor;
}
 

private void tryOpenFileInEditor(final IFile file, final IFile generatedFile) {
	final IEditorDescriptor desc = getWorkbench().getEditorRegistry().getDefaultEditor(file.getName());
	if (null != desc) {
		final IWorkbenchPage page = getWorkbench().getActiveWorkbenchWindow().getActivePage();
		try {
			page.openEditor(new FileEditorInput(generatedFile), desc.getId());
		} catch (final PartInitException e) {
			throw new RuntimeException("Error while trying to open generated JS file for " + file, e);
		}
	}
}
 

@Override
public void init(IEditorSite site, IEditorInput input) throws PartInitException {
	if (LOGGER.isDebugEnabled()) {
		LOGGER.debug("init(IEditorSite site, IEditorInput input)");
	}
	setSite(site);
	setInput(input);

	// 设置Editor标题栏的显示名称，否则名称用plugin.xml中的name属性
	setPartName(input.getName());

	Image oldTitleImage = titleImage;
	if (input != null) {
		IEditorRegistry editorRegistry = PlatformUI.getWorkbench().getEditorRegistry();
		IEditorDescriptor editorDesc = editorRegistry.findEditor(getSite().getId());
		ImageDescriptor imageDesc = editorDesc != null ? editorDesc.getImageDescriptor() : null;
		titleImage = imageDesc != null ? imageDesc.createImage() : null;
	}

	setTitleImage(titleImage);
	if (oldTitleImage != null && !oldTitleImage.isDisposed()) {
		oldTitleImage.dispose();
	}

	getSite().setSelectionProvider(this);

	cursorIbeam = new Cursor(null, SWT.CURSOR_IBEAM);
	cursorArrow = new Cursor(null, SWT.CURSOR_ARROW);

	hookListener();
}
 

/**
 * Creates a new action that will open instances of the specified editor on the then-selected file resources.
 *
 * @param page
 *            the workbench page in which to open the editor
 * @param descriptor
 *            the editor descriptor, or <code>null</code> if unspecified
 */
public OpenFileAction(final IWorkbenchPage page, final IEditorDescriptor descriptor) {
	super(page);
	setText(descriptor == null ? IDEWorkbenchMessages.OpenFileAction_text : descriptor.getLabel());
	PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IIDEHelpContextIds.OPEN_FILE_ACTION);
	setToolTipText(IDEWorkbenchMessages.OpenFileAction_toolTip);
	setId(ID);
	this.editorDescriptor = descriptor;
}
 

/**
 * @param filePath
 *            TODO: we should really make this into a utility function, and have the Ruble::Editor.open method use
 *            it. But I am giving up for now because Eclipse plugin dependencies drive me crazy!
 */
private void openEditorForFile(String filePath)
{
	File file = new File(filePath);
	// Process an existing file.
	if (file.exists() && file.isFile())
	{
		Path path = new Path(filePath);
		IFile fileForLocation = ResourcesPlugin.getWorkspace().getRoot().getFileForLocation(path);
		IEditorRegistry editorRegistry = PlatformUI.getWorkbench().getEditorRegistry();
		IEditorDescriptor editorDescriptor = null;
		if (fileForLocation == null)
		{
			IContentType contentType = Platform.getContentTypeManager().findContentTypeFor(filePath);
			editorDescriptor = editorRegistry.getDefaultEditor(filePath, contentType);
		}
		else
		{
			editorDescriptor = editorRegistry.getDefaultEditor(filePath);
		}
		String editorId = (editorDescriptor == null) ? "com.aptana.editor.text" : editorDescriptor.getId(); //$NON-NLS-1$
		try
		{
			IDE.openEditor(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage(), file.toURI(),
					editorId, true);
		}
		catch (PartInitException e)
		{
			IdeLog.logError(UIPlugin.getDefault(), e);
		}
	}
}
 

protected IEditorDescriptor getEditorDescriptor()
{
	IEditorRegistry editorReg = PlatformUI.getWorkbench().getEditorRegistry();
	if (uri.getPath() == null || uri.getPath().equals("/") || uri.getPath().trim().equals("")) //$NON-NLS-1$ //$NON-NLS-2$
	{
		return null;
	}
	IPath path = new Path(uri.getPath());
	return editorReg.getDefaultEditor(path.lastSegment());
}
 

/**
 * Returns the editor descriptor for the given URI. The editor descriptor is computed by the last segment of the URI
 * (the file name).
 * 
 * @param uri
 *            A file URI
 * @return the descriptor of the default editor, or null if not found
 */
public static IEditorDescriptor getEditorDescriptor(URI uri)
{
	// NOTE: Moved from PHP's EditorUtils
	String uriPath = uri.getPath();
	if (StringUtil.isEmpty(uriPath) || uriPath.equals("/")) //$NON-NLS-1$
	{
		return null;
	}
	IPath path = new Path(uriPath);
	return PlatformUI.getWorkbench().getEditorRegistry().getDefaultEditor(path.lastSegment());
}
 

private String getEditorID(IFile file) throws PartInitException {
    IEditorDescriptor desc = IDE.getEditorDescriptor(file);
    if (desc == null) {
        return PydevPlugin.getDefault().getWorkbench().getEditorRegistry()
                .findEditor(IEditorRegistry.SYSTEM_EXTERNAL_EDITOR_ID).getId();
    }
    return desc.getId();
}
 

@Override
public void dragStart(DragSourceEvent event) {
	fEditorInputDatas= new ArrayList<EditorInputData>();

	ISelection selection= fProvider.getSelection();
	if (selection instanceof IStructuredSelection) {
		IStructuredSelection structuredSelection= (IStructuredSelection) selection;
		for (Iterator<?> iter= structuredSelection.iterator(); iter.hasNext();) {
			Object element= iter.next();
			IEditorInput editorInput= EditorUtility.getEditorInput(element);
			if (editorInput != null && editorInput.getPersistable() != null) {
				try {
					String editorId= EditorUtility.getEditorID(editorInput);
					// see org.eclipse.ui.internal.ide.EditorAreaDropAdapter.openNonExternalEditor(..):
					IEditorRegistry editorReg= PlatformUI.getWorkbench().getEditorRegistry();
					IEditorDescriptor editorDesc= editorReg.findEditor(editorId);
					if (editorDesc != null && !editorDesc.isOpenExternal()) {
						fEditorInputDatas.add(EditorInputTransfer.createEditorInputData(editorId, editorInput));
					}
				} catch (PartInitException e) {
					JavaPlugin.log(e);
				}
			}
		}
	}

	event.doit= fEditorInputDatas.size() > 0;
}
 

@Override
public void init(IEditorSite site, IEditorInput input) throws PartInitException {
	if (LOGGER.isDebugEnabled()) {
		LOGGER.debug("init(IEditorSite site, IEditorInput input)");
	}
	setSite(site);
	setInput(input);

	// 设置Editor标题栏的显示名称，否则名称用plugin.xml中的name属性
	setPartName(input.getName());

	Image oldTitleImage = titleImage;
	if (input != null) {
		IEditorRegistry editorRegistry = PlatformUI.getWorkbench().getEditorRegistry();
		IEditorDescriptor editorDesc = editorRegistry.findEditor(getSite().getId());
		ImageDescriptor imageDesc = editorDesc != null ? editorDesc.getImageDescriptor() : null;
		titleImage = imageDesc != null ? imageDesc.createImage() : null;
	}

	setTitleImage(titleImage);
	if (oldTitleImage != null && !oldTitleImage.isDisposed()) {
		oldTitleImage.dispose();
	}

	getSite().setSelectionProvider(this);

	cursorIbeam = new Cursor(null, SWT.CURSOR_IBEAM);
	cursorArrow = new Cursor(null, SWT.CURSOR_ARROW);

	hookListener();
}
 

private IEditorDescriptor getEditorDescriptor( IEditorInput input,
		boolean determineContentType )
{
	if ( input == null )
	{
		throw new IllegalArgumentException( );
	}
	IContentType contentType = Platform.getContentTypeManager( )
			.findContentTypeFor( input.getName( ) );
	IEditorRegistry editorReg = PlatformUI.getWorkbench( )
			.getEditorRegistry( );
	return editorReg.getDefaultEditor( input.getName( ), contentType );
}
 

/**
 * Creates a new action that will open instances of the specified editor on the then-selected file resources.
 * @param page
 *            the workbench page in which to open the editor
 * @param descriptor
 *            the editor descriptor, or <code>null</code> if unspecified
 */
public OpenFileWithValidAction(IWorkbenchPage page, IEditorDescriptor descriptor) {
	super(page);
	setText(descriptor == null ? IDEWorkbenchMessages.OpenFileAction_text : descriptor.getLabel());
	PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IIDEHelpContextIds.OPEN_FILE_ACTION);
	setToolTipText(IDEWorkbenchMessages.OpenFileAction_toolTip);
	setId(ID);
	this.editorDescriptor = descriptor;
}
 

/**
 * Creates a new action that will open instances of the specified editor on the then-selected file resources.
 * @param page
 *            the workbench page in which to open the editor
 * @param descriptor
 *            the editor descriptor, or <code>null</code> if unspecified
 */
public OpenFileWithValidAction(IWorkbenchPage page, IEditorDescriptor descriptor) {
	super(page);
	setText(descriptor == null ? IDEWorkbenchMessages.OpenFileAction_text : descriptor.getLabel());
	PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IIDEHelpContextIds.OPEN_FILE_ACTION);
	setToolTipText(IDEWorkbenchMessages.OpenFileAction_toolTip);
	setId(ID);
	this.editorDescriptor = descriptor;
}