bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/dialogs/ProjectCapabilityPropertyPage.java

package org.eclipse.ui.internal.dialogs;

/**********************************************************************
Copyright (c) 2002 IBM Corp. and others.
All rights reserved.   This program and the accompanying materials
are made available under the terms of the Common Public License v0.5
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/cpl-v05.html
 
Contributors:
Sebastian Davids <sdavids@gmx.de> - Fix for bug 19346 - Dialog font should be
activated and used by other components.
*********************************************************************/
import java.util.ArrayList;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.*;
import org.eclipse.ui.dialogs.PropertyPage;
import org.eclipse.ui.help.WorkbenchHelp;
import org.eclipse.ui.internal.*;
import org.eclipse.ui.internal.misc.ProjectCapabilitySelectionGroup;
import org.eclipse.ui.internal.registry.*;

/**
 * A property page for IProject resources to view and edit the
 * capabilities assigned to the project.
 */
public class ProjectCapabilityPropertyPage extends PropertyPage {
	/**
	 * The wizard dialog width
	 */
	private static final int SIZING_WIZARD_WIDTH = 500;

	/**
	 * The wizard dialog height
	 */
	private static final int SIZING_WIZARD_HEIGHT = 500;
	
	private IProject project;
	private ProjectCapabilitySelectionGroup capabilityGroup;

	/**
	 * Creates a new ProjectCapabilityPropertyPage.
	 */
	public ProjectCapabilityPropertyPage() {
		super();
	}
	
	/* (non-Javadoc)
	 * Method declared on PreferencePage
	 */
	protected Control createContents(Composite parent) {
		WorkbenchHelp.setHelp(parent, IHelpContextIds.PROJECT_CAPABILITY_PROPERTY_PAGE);
		noDefaultAndApplyButton();
		CapabilityRegistry reg = WorkbenchPlugin.getDefault().getCapabilityRegistry();
		
		String instructions;
		if (reg.hasCapabilities())
			instructions = WorkbenchMessages.getString("ProjectCapabilityPropertyPage.chooseCapabilities"); //$NON-NLS-1$
		else
			instructions = WorkbenchMessages.getString("ProjectCapabilityPropertyPage.noCapabilities"); //$NON-NLS-1$
		Label label = new Label(parent, SWT.LEFT);
		label.setFont(parent.getFont());
		label.setText(instructions);
		
		Capability[] caps = reg.getProjectCapabilities(getProject());
		Capability[] disabledCaps = reg.getProjectDisabledCapabilities(getProject());
		ICategory[] cats = new ICategory[0];
		capabilityGroup = new ProjectCapabilitySelectionGroup(cats, caps, disabledCaps, reg);
		return capabilityGroup.createContents(parent);
	}
	
	/**
	 * Returns the project which this property page applies to
	 * 
	 * @return IProject the project for this property page
	 */
	/* package */ IProject getProject() {
		if (project == null)
			project = (IProject) getElement().getAdapter(IResource.class);
			
		return project;
	}

	/* (non-Javadoc)
	 * Method declared on PreferencePage
	 */
	public boolean performOk() {
		// Avoid doing any work if no changes were made.
		if (!capabilityGroup.getCapabilitiesModified())
			return true;

		// Validate the requested changes are ok
		CapabilityRegistry reg = WorkbenchPlugin.getDefault().getCapabilityRegistry();
		Capability[] caps = capabilityGroup.getSelectedCapabilities();
		IStatus status = reg.validateCapabilities(caps);
		if (!status.isOK()) {
			ErrorDialog.openError(
				getShell(),
				WorkbenchMessages.getString("ProjectCapabilityPropertyPage.errorTitle"), //$NON-NLS-1$
				WorkbenchMessages.getString("ProjectCapabilityPropertyPage.invalidSelection"), //$NON-NLS-1$
				status);
			return true;
		}

		// Get the current set of nature ids on the project
		String[] natureIds;
		try {
			natureIds = getProject().getDescription().getNatureIds();
			natureIds = getProject().getWorkspace().sortNatureSet(natureIds);
		} catch (CoreException e) {
			ErrorDialog.openError(
				getShell(),
				WorkbenchMessages.getString("ProjectCapabilityPropertyPage.errorTitle"), //$NON-NLS-1$
				WorkbenchMessages.getString("ProjectCapabilityPropertyPage.internalError"), //$NON-NLS-1$
				e.getStatus());
			return true;
		}
		
		// Keep only the nature ids whose capability is selected
		ArrayList keepIds = new ArrayList();
		ArrayList removeCaps = new ArrayList();
		for (int i = 0; i < natureIds.length; i++) {
			boolean isRemoved = true;
			String id = natureIds[i];
			for (int j = 0; j < caps.length; j++) {
				if (id.equals(caps[j].getNatureId())) {
					keepIds.add(id);
					isRemoved = false;
					break;
				}
			}
			if (isRemoved)
				removeCaps.add(reg.getCapabilityForNature(id));
		}
		
		// Collect the capabilities to add
		ArrayList newCaps = new ArrayList();
		for (int i = 0; i < caps.length; i++) {
			boolean isNew = true;
			Capability cap = caps[i];
			for (int j = 0; j < natureIds.length; j++) {
				if (natureIds[j].equals(cap.getNatureId())) {
					isNew = false;
					break;
				}
			}
			if (isNew)
				newCaps.add(cap);
		}

		// Launch the step wizard if needed		
		if (newCaps.size() > 0 || removeCaps.size() > 0) {
			Capability[] newCapabilities = new Capability[newCaps.size()];
			newCaps.toArray(newCapabilities);
			
			Capability[] removeCapabilities = new Capability[removeCaps.size()];
			removeCaps.toArray(removeCapabilities);
			
			UpdateProjectCapabilityWizard wizard =
				new UpdateProjectCapabilityWizard(getProject(), newCapabilities, removeCapabilities);
			
			MultiStepWizardDialog dialog = new MultiStepWizardDialog(getShell(), wizard);
			dialog.create();
			dialog.getShell().setSize( Math.max(SIZING_WIZARD_WIDTH, dialog.getShell().getSize().x), SIZING_WIZARD_HEIGHT );
			WorkbenchHelp.setHelp(dialog.getShell(), IHelpContextIds.UPDATE_CAPABILITY_WIZARD);
			dialog.open();
		}
		
		return true;
	}
}