core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/workingsets/CElementWorkingSetPage.java - cdt/org.eclipse.cdt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2016 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *     Anton Leherbauer (Wind River Systems)
  *******************************************************************************/
 package org.eclipse.cdt.internal.ui.workingsets;

 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;

 import org.eclipse.cdt.core.model.CModelException;
 import org.eclipse.cdt.core.model.CoreModel;
 import org.eclipse.cdt.core.model.ICContainer;
 import org.eclipse.cdt.core.model.ICElement;
 import org.eclipse.cdt.core.model.ICModel;
 import org.eclipse.cdt.core.model.ICProject;
 import org.eclipse.cdt.internal.ui.CPluginImages;
 import org.eclipse.cdt.internal.ui.actions.SelectionConverter;
 import org.eclipse.cdt.internal.ui.viewsupport.AppearanceAwareLabelProvider;
 import org.eclipse.cdt.internal.ui.viewsupport.CElementImageProvider;
 import org.eclipse.cdt.internal.ui.viewsupport.DecoratingCLabelProvider;
 import org.eclipse.cdt.ui.CElementGrouping;
 import org.eclipse.cdt.ui.CElementSorter;
 import org.eclipse.cdt.ui.CUIPlugin;
 import org.eclipse.core.resources.IContainer;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.viewers.CheckStateChangedEvent;
 import org.eclipse.jface.viewers.CheckboxTreeViewer;
 import org.eclipse.jface.viewers.ITreeContentProvider;
 import org.eclipse.jface.viewers.ITreeViewerListener;
 import org.eclipse.jface.viewers.TreeExpansionEvent;
 import org.eclipse.jface.wizard.WizardPage;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.BusyIndicator;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.IWorkbenchPage;
 import org.eclipse.ui.IWorkbenchPart;
 import org.eclipse.ui.IWorkingSet;
 import org.eclipse.ui.IWorkingSetManager;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.dialogs.IWorkingSetPage;

 /**
  * The C element working set page allows the user to create
  * and edit a C element working set.
  * <p>
  * Working set elements are presented as a C element tree.
  * </p>
  *
  */
 public class CElementWorkingSetPage extends WizardPage implements IWorkingSetPage {

 	final private static String PAGE_TITLE = WorkingSetMessages.CElementWorkingSetPage_title;
 	final private static String PAGE_ID = "CElementWorkingSetPage"; //$NON-NLS-1$

 	private final static int SIZING_SELECTION_WIDGET_WIDTH = 50;
 	private final static int SIZING_SELECTION_WIDGET_HEIGHT = 200;

 	private Text fWorkingSetName;
 	private CheckboxTreeViewer fTree;
 	private IWorkingSet fWorkingSet;
 	private boolean fFirstCheck; // set to true if selection is set in setSelection
 	private ITreeContentProvider fTreeContentProvider;

 	/**
 	 * Creates a new instance of the receiver.
 	 */
 	public CElementWorkingSetPage() {
 		super(PAGE_ID, PAGE_TITLE, CPluginImages.DESC_WIZABAN_C_APP);
 		setDescription(WorkingSetMessages.CElementWorkingSetPage_description);
 		fFirstCheck = true;
 	}

 	/*
 	 * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)
 	 */
 	@Override
 	public void createControl(Composite parent) {
 		initializeDialogUnits(parent);

 		Composite composite = new Composite(parent, SWT.NULL);
 		composite.setLayout(new GridLayout());
 		composite.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));
 		setControl(composite);

 		Label label = new Label(composite, SWT.WRAP);
 		label.setText(WorkingSetMessages.CElementWorkingSetPage_name);
 		GridData gd = new GridData(
 				GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER);
 		label.setLayoutData(gd);

 		fWorkingSetName = new Text(composite, SWT.SINGLE | SWT.BORDER);
 		fWorkingSetName.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL));
 		fWorkingSetName.addModifyListener(e -> validateInput());
 		fWorkingSetName.setFocus();

 		label = new Label(composite, SWT.WRAP);
 		label.setText(WorkingSetMessages.CElementWorkingSetPage_content);
 		gd = new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER);
 		label.setLayoutData(gd);

 		fTree = new CheckboxTreeViewer(composite);
 		gd = new GridData(GridData.FILL_BOTH | GridData.GRAB_VERTICAL);
 		gd.heightHint = SIZING_SELECTION_WIDGET_HEIGHT;
 		gd.widthHint = SIZING_SELECTION_WIDGET_WIDTH;
 		fTree.getControl().setLayoutData(gd);

 		fTreeContentProvider = new CElementWorkingSetPageContentProvider();
 		fTree.setContentProvider(fTreeContentProvider);

 		AppearanceAwareLabelProvider cElementLabelProvider = new AppearanceAwareLabelProvider(
 				AppearanceAwareLabelProvider.DEFAULT_TEXTFLAGS,
 				AppearanceAwareLabelProvider.DEFAULT_IMAGEFLAGS | CElementImageProvider.SMALL_ICONS);

 		fTree.setLabelProvider(new DecoratingCLabelProvider(cElementLabelProvider));
 		fTree.setComparator(new CElementSorter());
 		fTree.setUseHashlookup(true);

 		fTree.setInput(CoreModel.create(CUIPlugin.getWorkspace().getRoot()));

 		fTree.addCheckStateListener(event -> handleCheckStateChange(event));

 		fTree.addTreeListener(new ITreeViewerListener() {
 			@Override
 			public void treeCollapsed(TreeExpansionEvent event) {
 			}

 			@Override
 			public void treeExpanded(TreeExpansionEvent event) {
 				final Object element = event.getElement();
 				if (fTree.getGrayed(element) == false)
 					BusyIndicator.showWhile(getShell().getDisplay(),
 							() -> setSubtreeChecked(element, fTree.getChecked(element), false));
 			}
 		});

 		if (fWorkingSet != null) {
 			fWorkingSetName.setText(fWorkingSet.getName());
 		}
 		initializeCheckedState();
 		validateInput();

 		Dialog.applyDialogFont(composite);
 		// TODO Set help for the page
 		//		CUIHelp.setHelp(fTree, ICHelpContextIds.C_WORKING_SET_PAGE);
 	}

 	/*
 	 * @see org.eclipse.ui.dialogs.IWorkingSetPage#finish()
 	 */
 	@Override
 	public void finish() {
 		String workingSetName = fWorkingSetName.getText();
 		ArrayList<Object> elements = new ArrayList<>(10);
 		findCheckedElements(elements, fTree.getInput());
 		if (fWorkingSet == null) {
 			IWorkingSetManager workingSetManager = PlatformUI.getWorkbench().getWorkingSetManager();
 			fWorkingSet = workingSetManager.createWorkingSet(workingSetName,
 					elements.toArray(new IAdaptable[elements.size()]));
 		} else {
 			// Add inaccessible resources
 			IAdaptable[] oldItems = fWorkingSet.getElements();
 			HashSet<IProject> closedWithChildren = new HashSet<>(elements.size());
 			for (IAdaptable oldItem : oldItems) {
 				IResource oldResource = null;
 				if (oldItem instanceof IResource) {
 					oldResource = (IResource) oldItem;
 				} else {
 					oldResource = oldItem.getAdapter(IResource.class);
 				}
 				if (oldResource != null && oldResource.isAccessible() == false) {
 					IProject project = oldResource.getProject();
 					if (closedWithChildren.contains(project) || elements.contains(project)) {
 						elements.add(oldItem);
 						elements.remove(project);
 						closedWithChildren.add(project);
 					}
 				}
 			}
 			fWorkingSet.setName(workingSetName);
 			fWorkingSet.setElements(elements.toArray(new IAdaptable[elements.size()]));
 		}
 	}

 	/*
 	 * @see org.eclipse.ui.dialogs.IWorkingSetPage#getSelection()
 	 */
 	@Override
 	public IWorkingSet getSelection() {
 		return fWorkingSet;
 	}

 	/**
 	 * Called when the checked state of a tree item changes.
 	 *
 	 * @param event the checked state change event.
 	 */
 	void handleCheckStateChange(final CheckStateChangedEvent event) {
 		BusyIndicator.showWhile(getShell().getDisplay(), () -> {
 			IAdaptable element = (IAdaptable) event.getElement();
 			boolean state = event.getChecked();

 			fTree.setGrayed(element, false);
 			if (isExpandable(element)) {
 				setSubtreeChecked(element, state, true);
 			}
 			updateParentState(element, state);
 			validateInput();
 		});
 	}

 	private boolean isExpandable(Object element) {
 		return (element instanceof ICProject || element instanceof ICContainer || element instanceof CElementGrouping
 				|| element instanceof ICModel || element instanceof IContainer);
 	}

 	private void updateParentState(Object child, boolean baseChildState) {
 		if (child == null)
 			return;
 		if (child instanceof IAdaptable) {
 			IResource resource = ((IAdaptable) child).getAdapter(IResource.class);
 			if (resource != null && !resource.isAccessible())
 				return;
 		}
 		Object parent = fTreeContentProvider.getParent(child);
 		if (parent == null)
 			return;

 		updateObjectState(parent, baseChildState);
 	}

 	private void updateObjectState(Object element, boolean baseChildState) {

 		boolean allSameState = true;
 		Object[] children = fTreeContentProvider.getChildren(element);

 		for (int i = children.length - 1; i >= 0; i--) {
 			if (fTree.getChecked(children[i]) != baseChildState || fTree.getGrayed(children[i])) {
 				allSameState = false;
 				break;
 			}
 		}

 		fTree.setGrayed(element, !allSameState);
 		fTree.setChecked(element, !allSameState || baseChildState);

 		updateParentState(element, baseChildState);
 	}

 	/**
 	 * Sets the checked state of tree items based on the initial
 	 * working set, if any.
 	 */
 	private void initializeCheckedState() {
 		BusyIndicator.showWhile(getShell().getDisplay(), () -> {
 			Object[] elements;
 			if (fWorkingSet == null) {
 				// Use current part's selection for initialization
 				IWorkbenchPage page = CUIPlugin.getActivePage();
 				if (page == null)
 					return;

 				IWorkbenchPart part = CUIPlugin.getActivePage().getActivePart();
 				if (part == null)
 					return;

 				try {
 					elements = SelectionConverter.getStructuredSelection(part).toArray();
 					for (int i1 = 0; i1 < elements.length; i1++) {
 						if (elements[i1] instanceof IResource) {
 							ICElement ce = ((IResource) elements[i1]).getAdapter(ICElement.class);
 							if (ce != null && ce.exists() && ce.getCProject().isOnSourceRoot((IResource) elements[i1]))
 								elements[i1] = ce;
 						}
 					}
 				} catch (CModelException e) {
 					return;
 				}
 			} else
 				elements = fWorkingSet.getElements();

 			for (int i2 = 0; i2 < elements.length; i2++) {
 				Object element1 = elements[i2];
 				if (element1 instanceof IResource) {
 					IProject project = ((IResource) element1).getProject();
 					if (!project.isAccessible()) {
 						elements[i2] = project;
 					} else {
 						// for backwards compatibility: adapt to ICElement if possible
 						if (CoreModel.hasCNature(project)) {
 							ICElement cElement = CoreModel.getDefault().create((IResource) element1);
 							if (cElement != null) {
 								elements[i2] = cElement;
 							}
 						}
 					}
 				} else if (element1 instanceof ICElement) {
 					ICProject cProject = ((ICElement) element1).getCProject();
 					if (cProject != null && !cProject.getProject().isAccessible())
 						elements[i2] = cProject.getProject();
 				}
 			}
 			fTree.setCheckedElements(elements);
 			HashSet<Object> parents = new HashSet<>();
 			for (Object element2 : elements) {
 				if (isExpandable(element2))
 					setSubtreeChecked(element2, true, true);

 				if (element2 instanceof IAdaptable) {
 					IResource resource = ((IAdaptable) element2).getAdapter(IResource.class);
 					if (resource != null && !resource.isAccessible())
 						continue;
 				}
 				Object parent = fTreeContentProvider.getParent(element2);
 				if (parent != null)
 					parents.add(parent);
 			}

 			for (Object object : parents)
 				updateObjectState(object, true);
 		});
 	}

 	/*
 	 * @see org.eclipse.ui.dialogs.IWorkingSetPage#setSelection(org.eclipse.ui.IWorkingSet)
 	 */
 	@Override
 	public void setSelection(IWorkingSet workingSet) {
 		if (workingSet == null) {
 			throw new IllegalArgumentException("Working set must not be null"); //$NON-NLS-1$
 		}
 		fWorkingSet = workingSet;
 		if (getContainer() != null && fWorkingSetName != null) {
 			fFirstCheck = false;
 			fWorkingSetName.setText(workingSet.getName());
 			initializeCheckedState();
 			validateInput();
 		}
 	}

 	/**
 	 * Sets the checked state of the container's members.
 	 *
 	 * @param parent the parent whose children should be checked/unchecked
 	 * @param state true=check all members in the container. false=uncheck all
 	 * 	members in the container.
 	 * @param checkExpandedState true=recurse into sub-containers and set the
 	 * 	checked state. false=only set checked state of members of this container
 	 */
 	private void setSubtreeChecked(Object parent, boolean state, boolean checkExpandedState) {
 		if (!(parent instanceof IAdaptable))
 			return;
 		IContainer container = ((IAdaptable) parent).getAdapter(IContainer.class);
 		if ((!fTree.getExpandedState(parent) && checkExpandedState) || (container != null && !container.isAccessible()))
 			return;

 		Object[] children = fTreeContentProvider.getChildren(parent);
 		for (int i = children.length - 1; i >= 0; i--) {
 			Object element = children[i];
 			if (state) {
 				fTree.setChecked(element, true);
 				fTree.setGrayed(element, false);
 			} else
 				fTree.setGrayChecked(element, false);
 			if (isExpandable(element))
 				setSubtreeChecked(element, state, true);
 		}
 	}

 	/**
 	 * Validates the working set name and the checked state of the
 	 * resource tree.
 	 */
 	void validateInput() {
 		String errorMessage = null;
 		String newText = fWorkingSetName.getText();

 		if (newText.equals(newText.trim()) == false) {
 			errorMessage = WorkingSetMessages.CElementWorkingSetPage_warning_nameMustNotBeEmpty;
 		}
 		if (newText.isEmpty()) {
 			if (fFirstCheck) {
 				setPageComplete(false);
 				fFirstCheck = false;
 				return;
 			}
 			errorMessage = WorkingSetMessages.CElementWorkingSetPage_warning_nameMustNotBeEmpty;
 		}

 		fFirstCheck = false;

 		if (errorMessage == null && (fWorkingSet == null || newText.equals(fWorkingSet.getName()) == false)) {
 			IWorkingSet[] workingSets = PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSets();
 			for (IWorkingSet workingSet : workingSets) {
 				if (newText.equals(workingSet.getName())) {
 					errorMessage = WorkingSetMessages.CElementWorkingSetPage_warning_workingSetExists;
 				}
 			}
 		}

 		if (errorMessage == null && fTree.getCheckedElements().length == 0) {
 			String infoMessage = WorkingSetMessages.CElementWorkingSetPage_warning_resourceMustBeChecked;
 			setMessage(infoMessage, INFORMATION);
 		}
 		setErrorMessage(errorMessage);
 		setPageComplete(errorMessage == null);
 	}

 	/**
 	 * Collects all checked elements of the given parent.
 	 *
 	 * @param checkedElements the output, list of checked elements
 	 * @param parent the parent to collect checked elements in
 	 */
 	private void findCheckedElements(List<Object> checkedElements, Object parent) {
 		Object[] children = fTreeContentProvider.getChildren(parent);
 		for (Object element : children) {
 			if (fTree.getGrayed(element))
 				findCheckedElements(checkedElements, element);
 			else if (fTree.getChecked(element))
 				checkedElements.add(element);
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2016 IBM Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	* Anton Leherbauer (Wind River Systems)
	*******************************************************************************/
	package org.eclipse.cdt.internal.ui.workingsets;

	import java.util.ArrayList;
	import java.util.HashSet;
	import java.util.List;

	import org.eclipse.cdt.core.model.CModelException;
	import org.eclipse.cdt.core.model.CoreModel;
	import org.eclipse.cdt.core.model.ICContainer;
	import org.eclipse.cdt.core.model.ICElement;
	import org.eclipse.cdt.core.model.ICModel;
	import org.eclipse.cdt.core.model.ICProject;
	import org.eclipse.cdt.internal.ui.CPluginImages;
	import org.eclipse.cdt.internal.ui.actions.SelectionConverter;
	import org.eclipse.cdt.internal.ui.viewsupport.AppearanceAwareLabelProvider;
	import org.eclipse.cdt.internal.ui.viewsupport.CElementImageProvider;
	import org.eclipse.cdt.internal.ui.viewsupport.DecoratingCLabelProvider;
	import org.eclipse.cdt.ui.CElementGrouping;
	import org.eclipse.cdt.ui.CElementSorter;
	import org.eclipse.cdt.ui.CUIPlugin;
	import org.eclipse.core.resources.IContainer;
	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.runtime.IAdaptable;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.viewers.CheckStateChangedEvent;
	import org.eclipse.jface.viewers.CheckboxTreeViewer;
	import org.eclipse.jface.viewers.ITreeContentProvider;
	import org.eclipse.jface.viewers.ITreeViewerListener;
	import org.eclipse.jface.viewers.TreeExpansionEvent;
	import org.eclipse.jface.wizard.WizardPage;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.BusyIndicator;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.IWorkbenchPage;
	import org.eclipse.ui.IWorkbenchPart;
	import org.eclipse.ui.IWorkingSet;
	import org.eclipse.ui.IWorkingSetManager;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.dialogs.IWorkingSetPage;

	/**
	* The C element working set page allows the user to create
	* and edit a C element working set.
	* <p>
	* Working set elements are presented as a C element tree.
	* </p>
	*
	*/
	public class CElementWorkingSetPage extends WizardPage implements IWorkingSetPage {

	final private static String PAGE_TITLE = WorkingSetMessages.CElementWorkingSetPage_title;
	final private static String PAGE_ID = "CElementWorkingSetPage"; //$NON-NLS-1$

	private final static int SIZING_SELECTION_WIDGET_WIDTH = 50;
	private final static int SIZING_SELECTION_WIDGET_HEIGHT = 200;

	private Text fWorkingSetName;
	private CheckboxTreeViewer fTree;
	private IWorkingSet fWorkingSet;
	private boolean fFirstCheck; // set to true if selection is set in setSelection
	private ITreeContentProvider fTreeContentProvider;

	/**
	* Creates a new instance of the receiver.
	*/
	public CElementWorkingSetPage() {
	super(PAGE_ID, PAGE_TITLE, CPluginImages.DESC_WIZABAN_C_APP);
	setDescription(WorkingSetMessages.CElementWorkingSetPage_description);
	fFirstCheck = true;
	}

	/*
	* @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)
	*/
	@Override
	public void createControl(Composite parent) {
	initializeDialogUnits(parent);

	Composite composite = new Composite(parent, SWT.NULL);
	composite.setLayout(new GridLayout());
	composite.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));
	setControl(composite);

	Label label = new Label(composite, SWT.WRAP);
	label.setText(WorkingSetMessages.CElementWorkingSetPage_name);
	GridData gd = new GridData(
	GridData.GRAB_HORIZONTAL \| GridData.HORIZONTAL_ALIGN_FILL \| GridData.VERTICAL_ALIGN_CENTER);
	label.setLayoutData(gd);

	fWorkingSetName = new Text(composite, SWT.SINGLE \| SWT.BORDER);
	fWorkingSetName.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL \| GridData.HORIZONTAL_ALIGN_FILL));
	fWorkingSetName.addModifyListener(e -> validateInput());
	fWorkingSetName.setFocus();

	label = new Label(composite, SWT.WRAP);
	label.setText(WorkingSetMessages.CElementWorkingSetPage_content);
	gd = new GridData(GridData.GRAB_HORIZONTAL \| GridData.HORIZONTAL_ALIGN_FILL \| GridData.VERTICAL_ALIGN_CENTER);
	label.setLayoutData(gd);

	fTree = new CheckboxTreeViewer(composite);
	gd = new GridData(GridData.FILL_BOTH \| GridData.GRAB_VERTICAL);
	gd.heightHint = SIZING_SELECTION_WIDGET_HEIGHT;
	gd.widthHint = SIZING_SELECTION_WIDGET_WIDTH;
	fTree.getControl().setLayoutData(gd);

	fTreeContentProvider = new CElementWorkingSetPageContentProvider();
	fTree.setContentProvider(fTreeContentProvider);

	AppearanceAwareLabelProvider cElementLabelProvider = new AppearanceAwareLabelProvider(
	AppearanceAwareLabelProvider.DEFAULT_TEXTFLAGS,
	AppearanceAwareLabelProvider.DEFAULT_IMAGEFLAGS \| CElementImageProvider.SMALL_ICONS);

	fTree.setLabelProvider(new DecoratingCLabelProvider(cElementLabelProvider));
	fTree.setComparator(new CElementSorter());
	fTree.setUseHashlookup(true);

	fTree.setInput(CoreModel.create(CUIPlugin.getWorkspace().getRoot()));

	fTree.addCheckStateListener(event -> handleCheckStateChange(event));

	fTree.addTreeListener(new ITreeViewerListener() {
	@Override
	public void treeCollapsed(TreeExpansionEvent event) {
	}

	@Override
	public void treeExpanded(TreeExpansionEvent event) {
	final Object element = event.getElement();
	if (fTree.getGrayed(element) == false)
	BusyIndicator.showWhile(getShell().getDisplay(),
	() -> setSubtreeChecked(element, fTree.getChecked(element), false));
	}
	});

	if (fWorkingSet != null) {
	fWorkingSetName.setText(fWorkingSet.getName());
	}
	initializeCheckedState();
	validateInput();

	Dialog.applyDialogFont(composite);
	// TODO Set help for the page
	// CUIHelp.setHelp(fTree, ICHelpContextIds.C_WORKING_SET_PAGE);
	}

	/*
	* @see org.eclipse.ui.dialogs.IWorkingSetPage#finish()
	*/
	@Override
	public void finish() {
	String workingSetName = fWorkingSetName.getText();
	ArrayList<Object> elements = new ArrayList<>(10);
	findCheckedElements(elements, fTree.getInput());
	if (fWorkingSet == null) {
	IWorkingSetManager workingSetManager = PlatformUI.getWorkbench().getWorkingSetManager();
	fWorkingSet = workingSetManager.createWorkingSet(workingSetName,
	elements.toArray(new IAdaptable[elements.size()]));
	} else {
	// Add inaccessible resources
	IAdaptable[] oldItems = fWorkingSet.getElements();
	HashSet<IProject> closedWithChildren = new HashSet<>(elements.size());
	for (IAdaptable oldItem : oldItems) {
	IResource oldResource = null;
	if (oldItem instanceof IResource) {
	oldResource = (IResource) oldItem;
	} else {
	oldResource = oldItem.getAdapter(IResource.class);
	}
	if (oldResource != null && oldResource.isAccessible() == false) {
	IProject project = oldResource.getProject();
	if (closedWithChildren.contains(project) \|\| elements.contains(project)) {
	elements.add(oldItem);
	elements.remove(project);
	closedWithChildren.add(project);
	}
	}
	}
	fWorkingSet.setName(workingSetName);
	fWorkingSet.setElements(elements.toArray(new IAdaptable[elements.size()]));
	}
	}

	/*
	* @see org.eclipse.ui.dialogs.IWorkingSetPage#getSelection()
	*/
	@Override
	public IWorkingSet getSelection() {
	return fWorkingSet;
	}

	/**
	* Called when the checked state of a tree item changes.
	*
	* @param event the checked state change event.
	*/
	void handleCheckStateChange(final CheckStateChangedEvent event) {
	BusyIndicator.showWhile(getShell().getDisplay(), () -> {
	IAdaptable element = (IAdaptable) event.getElement();
	boolean state = event.getChecked();

	fTree.setGrayed(element, false);
	if (isExpandable(element)) {
	setSubtreeChecked(element, state, true);
	}
	updateParentState(element, state);
	validateInput();
	});
	}

	private boolean isExpandable(Object element) {
	return (element instanceof ICProject \|\| element instanceof ICContainer \|\| element instanceof CElementGrouping
	\|\| element instanceof ICModel \|\| element instanceof IContainer);
	}

	private void updateParentState(Object child, boolean baseChildState) {
	if (child == null)
	return;
	if (child instanceof IAdaptable) {
	IResource resource = ((IAdaptable) child).getAdapter(IResource.class);
	if (resource != null && !resource.isAccessible())
	return;
	}
	Object parent = fTreeContentProvider.getParent(child);
	if (parent == null)
	return;

	updateObjectState(parent, baseChildState);
	}

	private void updateObjectState(Object element, boolean baseChildState) {

	boolean allSameState = true;
	Object[] children = fTreeContentProvider.getChildren(element);

	for (int i = children.length - 1; i >= 0; i--) {
	if (fTree.getChecked(children[i]) != baseChildState \|\| fTree.getGrayed(children[i])) {
	allSameState = false;
	break;
	}
	}

	fTree.setGrayed(element, !allSameState);
	fTree.setChecked(element, !allSameState \|\| baseChildState);

	updateParentState(element, baseChildState);
	}

	/**
	* Sets the checked state of tree items based on the initial
	* working set, if any.
	*/
	private void initializeCheckedState() {
	BusyIndicator.showWhile(getShell().getDisplay(), () -> {
	Object[] elements;
	if (fWorkingSet == null) {
	// Use current part's selection for initialization
	IWorkbenchPage page = CUIPlugin.getActivePage();
	if (page == null)
	return;

	IWorkbenchPart part = CUIPlugin.getActivePage().getActivePart();
	if (part == null)
	return;

	try {
	elements = SelectionConverter.getStructuredSelection(part).toArray();
	for (int i1 = 0; i1 < elements.length; i1++) {
	if (elements[i1] instanceof IResource) {
	ICElement ce = ((IResource) elements[i1]).getAdapter(ICElement.class);
	if (ce != null && ce.exists() && ce.getCProject().isOnSourceRoot((IResource) elements[i1]))
	elements[i1] = ce;
	}
	}
	} catch (CModelException e) {
	return;
	}
	} else
	elements = fWorkingSet.getElements();

	for (int i2 = 0; i2 < elements.length; i2++) {
	Object element1 = elements[i2];
	if (element1 instanceof IResource) {
	IProject project = ((IResource) element1).getProject();
	if (!project.isAccessible()) {
	elements[i2] = project;
	} else {
	// for backwards compatibility: adapt to ICElement if possible
	if (CoreModel.hasCNature(project)) {
	ICElement cElement = CoreModel.getDefault().create((IResource) element1);
	if (cElement != null) {
	elements[i2] = cElement;
	}
	}
	}
	} else if (element1 instanceof ICElement) {
	ICProject cProject = ((ICElement) element1).getCProject();
	if (cProject != null && !cProject.getProject().isAccessible())
	elements[i2] = cProject.getProject();
	}
	}
	fTree.setCheckedElements(elements);
	HashSet<Object> parents = new HashSet<>();
	for (Object element2 : elements) {
	if (isExpandable(element2))
	setSubtreeChecked(element2, true, true);

	if (element2 instanceof IAdaptable) {
	IResource resource = ((IAdaptable) element2).getAdapter(IResource.class);
	if (resource != null && !resource.isAccessible())
	continue;
	}
	Object parent = fTreeContentProvider.getParent(element2);
	if (parent != null)
	parents.add(parent);
	}

	for (Object object : parents)
	updateObjectState(object, true);
	});
	}

	/*
	* @see org.eclipse.ui.dialogs.IWorkingSetPage#setSelection(org.eclipse.ui.IWorkingSet)
	*/
	@Override
	public void setSelection(IWorkingSet workingSet) {
	if (workingSet == null) {
	throw new IllegalArgumentException("Working set must not be null"); //$NON-NLS-1$
	}
	fWorkingSet = workingSet;
	if (getContainer() != null && fWorkingSetName != null) {
	fFirstCheck = false;
	fWorkingSetName.setText(workingSet.getName());
	initializeCheckedState();
	validateInput();
	}
	}

	/**
	* Sets the checked state of the container's members.
	*
	* @param parent the parent whose children should be checked/unchecked
	* @param state true=check all members in the container. false=uncheck all
	* members in the container.
	* @param checkExpandedState true=recurse into sub-containers and set the
	* checked state. false=only set checked state of members of this container
	*/
	private void setSubtreeChecked(Object parent, boolean state, boolean checkExpandedState) {
	if (!(parent instanceof IAdaptable))
	return;
	IContainer container = ((IAdaptable) parent).getAdapter(IContainer.class);
	if ((!fTree.getExpandedState(parent) && checkExpandedState) \|\| (container != null && !container.isAccessible()))
	return;

	Object[] children = fTreeContentProvider.getChildren(parent);
	for (int i = children.length - 1; i >= 0; i--) {
	Object element = children[i];
	if (state) {
	fTree.setChecked(element, true);
	fTree.setGrayed(element, false);
	} else
	fTree.setGrayChecked(element, false);
	if (isExpandable(element))
	setSubtreeChecked(element, state, true);
	}
	}

	/**
	* Validates the working set name and the checked state of the
	* resource tree.
	*/
	void validateInput() {
	String errorMessage = null;
	String newText = fWorkingSetName.getText();

	if (newText.equals(newText.trim()) == false) {
	errorMessage = WorkingSetMessages.CElementWorkingSetPage_warning_nameMustNotBeEmpty;
	}
	if (newText.isEmpty()) {
	if (fFirstCheck) {
	setPageComplete(false);
	fFirstCheck = false;
	return;
	}
	errorMessage = WorkingSetMessages.CElementWorkingSetPage_warning_nameMustNotBeEmpty;
	}

	fFirstCheck = false;

	if (errorMessage == null && (fWorkingSet == null \|\| newText.equals(fWorkingSet.getName()) == false)) {
	IWorkingSet[] workingSets = PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSets();
	for (IWorkingSet workingSet : workingSets) {
	if (newText.equals(workingSet.getName())) {
	errorMessage = WorkingSetMessages.CElementWorkingSetPage_warning_workingSetExists;
	}
	}
	}

	if (errorMessage == null && fTree.getCheckedElements().length == 0) {
	String infoMessage = WorkingSetMessages.CElementWorkingSetPage_warning_resourceMustBeChecked;
	setMessage(infoMessage, INFORMATION);
	}
	setErrorMessage(errorMessage);
	setPageComplete(errorMessage == null);
	}

	/**
	* Collects all checked elements of the given parent.
	*
	* @param checkedElements the output, list of checked elements
	* @param parent the parent to collect checked elements in
	*/
	private void findCheckedElements(List<Object> checkedElements, Object parent) {
	Object[] children = fTreeContentProvider.getChildren(parent);
	for (Object element : children) {
	if (fTree.getGrayed(element))
	findCheckedElements(checkedElements, element);
	else if (fTree.getChecked(element))
	checkedElements.add(element);
	}
	}
	}