content: /*******************************************************************************
   * Copyright (c) 2000, 2008 IBM Corporation and others.
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.ui.wizards.buildpaths;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collection;
  
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.jface.resource.JFaceResources;
  import org.eclipse.jface.wizard.IWizardPage;
  import org.eclipse.jface.wizard.Wizard;
  import org.eclipse.jface.wizard.WizardDialog;
  import org.eclipse.swt.widgets.Shell;
  import org.eclipse.wst.jsdt.core.IIncludePathEntry;
  import org.eclipse.wst.jsdt.core.IJavaScriptProject;
  import org.eclipse.wst.jsdt.internal.ui.util.ExceptionHandler;
  import org.eclipse.wst.jsdt.internal.ui.util.PixelConverter;
  import org.eclipse.wst.jsdt.internal.ui.wizards.NewWizardMessages;
  import org.eclipse.wst.jsdt.ui.wizards.IJsGlobalScopeContainerPage;
  import org.eclipse.wst.jsdt.ui.wizards.IJsGlobalScopeContainerPageExtension;
  import org.eclipse.wst.jsdt.ui.wizards.IJsGlobalScopeContainerPageExtension2;
  
  /**
   * This wizard is used to add/edit JavaScript libraries to a JavaScript project.
    */
  public class JsGlobalScopeContainerWizard extends Wizard {
  	
  	private IJavaScriptProject fCurrProject;
  	
  	private IIncludePathEntry fEntryToEdit;
  	private IIncludePathEntry[] fNewEntries;
  	private IIncludePathEntry[] fCurrClasspath;
  	
  	private JsGlobalScopeContainerSelectionPage fSelectionWizardPage;
  	private IJsGlobalScopeContainerPage fContainerPage;
  
  	/**
  	 * Constructor for JsGlobalScopeContainerWizard.
  	 * @param entryToEdit entry to edit
  	 * @param currProject current project
  	 * @param currEntries entries currently in classpath
  	 */
  	public JsGlobalScopeContainerWizard(IIncludePathEntry entryToEdit, IJavaScriptProject currProject, IIncludePathEntry[] currEntries) {
  		fCurrProject= currProject;
  		
  		fEntryToEdit= entryToEdit;
  		fNewEntries= null;
  		fCurrClasspath= currEntries;
  		
  		if (entryToEdit == null) {
  			setWindowTitle(NewWizardMessages.JsGlobalScopeContainerWizard_new_title);
  		} else {
  			setWindowTitle(NewWizardMessages.JsGlobalScopeContainerWizard_edit_title);
  		}
  	}
  		
  	/**
  	 * Return an array of new include path entries
  	 * @return
  	 */
  	public IIncludePathEntry[] getNewEntries() {
  		return fNewEntries;
  	}
  
  	/* (non-Javadoc)
  	 * @see IWizard#performFinish()
  	 */
  	public boolean performFinish() {
  		if (fContainerPage != null) {
  			if (fContainerPage.finish()) {
  				if (fEntryToEdit == null && fContainerPage instanceof IJsGlobalScopeContainerPageExtension2) {
  					fNewEntries= ((IJsGlobalScopeContainerPageExtension2) fContainerPage).getNewContainers();
  				} else {
  					IIncludePathEntry entry= fContainerPage.getSelection();
  					fNewEntries= (entry != null) ? new IIncludePathEntry[] { entry } : null;
  				}
  				return true;
  			}
  		}
  		return false;
  	}
  
  	/* (non-Javadoc)
  	 * @see IWizard#addPages()
  	 */
  	public void addPages() {
  		if (fEntryToEdit == null) { // new entry: show selection page as first page
  			JsGlobalScopeContainerDescriptor[] allDescriptors= JsGlobalScopeContainerDescriptor.getDescriptors();
  			
  			// exclude existing containers
  			Collection descriptors = new ArrayList(Arrays.asList(allDescriptors));
  			for (int j = 0; j < fCurrClasspath.length; j++) {
  				for (int i = 0; i < allDescriptors.length; i++) {
  					if (allDescriptors[i].canEdit(fCurrClasspath[j])) {
  						descriptors.remove(allDescriptors[i]);
  					}
  				}
  			}
  
  			fSelectionWizardPage= new JsGlobalScopeContainerSelectionPage((JsGlobalScopeContainerDescriptor[]) descriptors.toArray(new JsGlobalScopeContainerDescriptor[descriptors.size()]));
  			addPage(fSelectionWizardPage);
  
  			// add as dummy, will not be shown
  			fContainerPage= new JsGlobalScopeContainerDefaultPage();
  			addPage(fContainerPage);
  		} else { // fPageDesc == null && fEntryToEdit != null
  			JsGlobalScopeContainerDescriptor[] containers= JsGlobalScopeContainerDescriptor.getDescriptors();
  			JsGlobalScopeContainerDescriptor descriptor= findDescriptorPage(containers, fEntryToEdit);
  			fContainerPage= getContainerPage(descriptor);
  			addPage(fContainerPage);				
  		}
  		super.addPages();
  	}
  	
  	private IJsGlobalScopeContainerPage getContainerPage(JsGlobalScopeContainerDescriptor pageDesc) {
  		IJsGlobalScopeContainerPage containerPage= null;
  		if (pageDesc != null) {
  			IJsGlobalScopeContainerPage page= pageDesc.getPage();
  			if (page != null) {
  				return page; // if page is already created, avoid double initialization
  			}
  			try {
  				containerPage= pageDesc.createPage();
  			} catch (CoreException e) {
  				handlePageCreationFailed(e);
  			}
  		}
  
  		if (containerPage == null)	{
  			containerPage= new JsGlobalScopeContainerDefaultPage();
  			if (pageDesc != null) {
  				pageDesc.setPage(containerPage); // avoid creation next time
  			}
  		}
  
  		if (containerPage instanceof IJsGlobalScopeContainerPageExtension) {
  			((IJsGlobalScopeContainerPageExtension) containerPage).initialize(fCurrProject, fCurrClasspath);
  		}
  
  		containerPage.setSelection(fEntryToEdit);
  		containerPage.setWizard(this);
  		return containerPage;
  	}
  	
  	/* (non-Javadoc)
  	 * @see IWizard#getNextPage(IWizardPage)
  	 */
  	public IWizardPage getNextPage(IWizardPage page) {
  		if (page == fSelectionWizardPage) {
  
  			JsGlobalScopeContainerDescriptor selected= fSelectionWizardPage.getSelected();
  			fContainerPage= getContainerPage(selected);
  			
  			return fContainerPage;
  		}
  		return super.getNextPage(page);
  	}
  	
  	private void handlePageCreationFailed(CoreException e) {
  		String title= NewWizardMessages.JsGlobalScopeContainerWizard_pagecreationerror_title; 
  		String message= NewWizardMessages.JsGlobalScopeContainerWizard_pagecreationerror_message; 
  		ExceptionHandler.handle(e, getShell(), title, message);
  	}
  	
  	
  	private JsGlobalScopeContainerDescriptor findDescriptorPage(JsGlobalScopeContainerDescriptor[] containers, IIncludePathEntry entry) {
  		for (int i = 0; i < containers.length; i++) {
  			if (containers[i].canEdit(entry)) {
  				return containers[i];
  			}
  		}
  		return null;
  	}
  	
  	/* (non-Javadoc)
  	 * @see org.eclipse.jface.wizard.Wizard#dispose()
  	 */
  	public void dispose() {
  		if (fSelectionWizardPage != null) {
  			JsGlobalScopeContainerDescriptor[] descriptors= fSelectionWizardPage.getContainers();
  			for (int i= 0; i < descriptors.length; i++) {
  				descriptors[i].dispose();
  			}
  		}
  		super.dispose();
  	}
  
  	/* (non-Javadoc)
  	 * @see IWizard#canFinish()
  	 */
  	public boolean canFinish() {
  		return fContainerPage.isPageComplete();
  	}
  	
  	public static int openWizard(Shell shell, JsGlobalScopeContainerWizard wizard) {
  		WizardDialog dialog= new WizardDialog(shell, wizard);
  		PixelConverter converter= new PixelConverter(JFaceResources.getDialogFont());
  		dialog.setMinimumPageSize(converter.convertWidthInCharsToPixels(70), converter.convertHeightInCharsToPixels(20));
  		dialog.create();
  		return dialog.open();
  	}
  	
  }
  