package org.objectstyle.wolips.eomodeler.editors.openEntity;
import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.core.commands.IHandlerListener;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IPerspectiveDescriptor;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.internal.ide.IIDEHelpContextIds;
import org.objectstyle.wolips.baseforplugins.util.FilesystemFolder;
import org.objectstyle.wolips.baseforplugins.util.ResourceUtilities;
import org.objectstyle.wolips.baseforplugins.util.URLUtils;
import org.objectstyle.wolips.eomodeler.EOModelerPerspectiveFactory;
import org.objectstyle.wolips.eomodeler.actions.OpenEntityModelerAction;
import org.objectstyle.wolips.eomodeler.core.model.EOEntity;
import org.objectstyle.wolips.eomodeler.core.model.EOModel;
import org.objectstyle.wolips.eomodeler.core.model.EOModelGroup;
import org.objectstyle.wolips.eomodeler.editors.EOModelEditor;
/**
* Implements the open resource action. Opens a dialog prompting for a file and
* opens the selected file in an editor.
*
* @since 2.1
*/
public class OpenEntityHandler extends Action implements IHandler, IWorkbenchWindowActionDelegate {
/**
* The identifier of the parameter storing the file path.
*/
private static String PARAM_ID_FILE_PATH = "filePath"; //$NON-NLS-1$
/**
* A collection of objects listening to changes to this manager. This
* collection is <code>null</code> if there are no listeners.
*/
private transient ListenerList listenerList = null;
/**
* Creates a new instance of the class.
*/
public OpenEntityHandler() {
super();
PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IIDEHelpContextIds.OPEN_WORKSPACE_FILE_ACTION);
}
public void addHandlerListener(final IHandlerListener listener) {
if (listenerList == null) {
listenerList = new ListenerList(ListenerList.IDENTITY);
}
listenerList.add(listener);
}
public void dispose() {
listenerList = null;
}
public Object execute(final ExecutionEvent event) throws ExecutionException {
EOModelEditor modelEditor = null;
final List<IResource> files = new ArrayList<IResource>();
if (event.getParameter(PARAM_ID_FILE_PATH) == null) {
// Prompt the user for the resource to open.
Object[] result = queryFileResource();
if (result != null) {
if (result.length == 2 && result[0] instanceof EOModelEditor) {
modelEditor = (EOModelEditor)result[0];
result = (Object[])result[1];
}
if (result != null) {
for (int i = 0; i < result.length; i++) {
files.add((IResource)result[i]);
}
}
}
} else {
// Use the given parameter.
final IResource resource = (IResource) event.getObjectParameterForExecution(PARAM_ID_FILE_PATH);
if (!(resource instanceof IFile)) {
throw new ExecutionException("filePath parameter must identify a file"); //$NON-NLS-1$
}
files.add(resource);
}
if (files.size() > 0) {
final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
if (window == null) {
throw new ExecutionException("no active workbench window"); //$NON-NLS-1$
}
final IWorkbenchPage page = window.getActivePage();
if (page == null) {
throw new ExecutionException("no active workbench page"); //$NON-NLS-1$
}
for (Iterator it = files.iterator(); it.hasNext();) {
IResource resource = (IResource)it.next();
IFile file = null;
if (!"eomodeld".equals(resource.getFileExtension()) && resource instanceof IFile) {
if (modelEditor != null) {
EOEntity entity = modelEditor.getModel().getModelGroup().getEntityNamed(ResourceUtilities.getFileNameWithoutExtension(resource));
if (entity != null) {
modelEditor.setSelection(new StructuredSelection(entity));
}
}
else {
file = (IFile)resource;//resource.getParent().getFile(new Path("index.eomodeld"));
OpenEntityModelerAction.openResourceIfPossible(null, file);
}
}
else if (resource instanceof IContainer) {
if (modelEditor != null) {
EOModel model = modelEditor.getModel().getModelGroup().getModelNamed(ResourceUtilities.getFileNameWithoutExtension(resource.getName()));
if (model != null) {
modelEditor.setSelection(new StructuredSelection(model));
}
}
else {
file = ((IContainer)resource).getFile(new Path("index.eomodeld"));
OpenEntityModelerAction.openResourceIfPossible(null, file);
}
}
else {
file = null;
}
}
}
return null;
}
public void init(final IWorkbenchWindow window) {
// Do nothing.
}
/**
* Query the user for the resources that should be opened
*
* @return the resource that should be opened.
*/
private Object[] queryFileResource() {
final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
if (window == null) {
return null;
}
final Shell parent = window.getShell();
IContainer input = ResourcesPlugin.getWorkspace().getRoot();
EOModelEditor modelEditor = null;
IWorkbenchPage activePage = window.getActivePage();
if (activePage != null) {
IPerspectiveDescriptor perspective = window.getActivePage().getPerspective();
if (perspective != null && EOModelerPerspectiveFactory.EOMODELER_PERSPECTIVE_ID.equals(perspective.getId())) {
IEditorPart editorPart = activePage.getActiveEditor();
if (editorPart instanceof EOModelEditor) {
modelEditor = (EOModelEditor)editorPart;
EOModel editingModel = modelEditor.getModel();
if (editingModel != null) {
List<File> modelFolders = new LinkedList<File>();
EOModelGroup modelGroup = editingModel.getModelGroup();
for (EOModel model : modelGroup.getModels()) {
File modelFolder = URLUtils.cheatAndTurnIntoFile(model.getModelURL()).getParentFile();
modelFolders.add(modelFolder);
}
if (modelFolders.size() > 0) {
input = new FilesystemFolder(new File("/"), modelFolders);
}
}
}
}
}
final OpenEntityDialog dialog = new OpenEntityDialog(parent, input, modelEditor == null);
final int resultCode = dialog.open();
if (resultCode != Window.OK) {
return null;
}
Object[] result = dialog.getResult();
if (modelEditor != null) {
result = new Object[] { modelEditor, result };
}
return result;
}
public void removeHandlerListener(final IHandlerListener listener) {
if (listenerList != null) {
listenerList.remove(listener);
if (listenerList.isEmpty()) {
listenerList = null;
}
}
}
public void run(final IAction action) {
try {
execute(new ExecutionEvent());
} catch (final ExecutionException e) {
// TODO Do something meaningful and poignant.
}
}
public void selectionChanged(final IAction action, ISelection selection) {
// Do nothing.
}
}