content: /*******************************************************************************
   * Copyright (c) 2000, 2009 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.newsourcepage;
  
  import java.util.ArrayList;
  
  import org.eclipse.core.resources.IResource;
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.core.runtime.IPath;
  import org.eclipse.jface.operation.IRunnableContext;
  import org.eclipse.jface.resource.JFaceResources;
  import org.eclipse.jface.viewers.IStructuredSelection;
  import org.eclipse.jface.viewers.StructuredSelection;
  import org.eclipse.jface.window.Window;
  import org.eclipse.jface.wizard.WizardDialog;
  import org.eclipse.swt.widgets.Shell;
  import org.eclipse.ui.IWorkbenchSite;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.ui.part.ISetSelectionTarget;
  import org.eclipse.wst.jsdt.core.IIncludePathEntry;
  import org.eclipse.wst.jsdt.core.IJavaScriptElement;
  import org.eclipse.wst.jsdt.core.IJavaScriptProject;
  import org.eclipse.wst.jsdt.core.IPackageFragmentRoot;
  import org.eclipse.wst.jsdt.core.JavaScriptModelException;
  import org.eclipse.wst.jsdt.internal.corext.buildpath.BuildpathDelta;
  import org.eclipse.wst.jsdt.internal.corext.buildpath.ClasspathModifier;
  import org.eclipse.wst.jsdt.internal.ui.JavaPluginImages;
  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.internal.ui.wizards.buildpaths.CPListElement;
  import org.eclipse.wst.jsdt.internal.ui.wizards.buildpaths.EditFilterWizard;
  
  //SelectedElements iff enabled: (IJavaScriptProject || IPackageFragmentRoot) && size == 1
  public class EditFilterAction extends BuildpathModifierAction {
  	
  	public EditFilterAction(IWorkbenchSite site) {
  		this(site, null, PlatformUI.getWorkbench().getProgressService());
  	}
  	
  	public EditFilterAction(IRunnableContext context, ISetSelectionTarget selectionTarget) {
  		this(null, selectionTarget, context);
      }
  	
  	private EditFilterAction(IWorkbenchSite site, ISetSelectionTarget selectionTarget, IRunnableContext context) {
  		super(site, selectionTarget, BuildpathModifierAction.EDIT_FILTERS);
  		
  		setText(NewWizardMessages.NewSourceContainerWorkbookPage_ToolBar_Edit_label);
  		setImageDescriptor(JavaPluginImages.DESC_ELCL_CONFIGURE_BUILDPATH_FILTERS);
  		setToolTipText(NewWizardMessages.NewSourceContainerWorkbookPage_ToolBar_Edit_tooltip); 
  		setDescription(NewWizardMessages.PackageExplorerActionGroup_FormText_Edit);
  		setDisabledImageDescriptor(JavaPluginImages.DESC_DLCL_CONFIGURE_BUILDPATH_FILTERS);
  	}
  	
  	/**
  	 * {@inheritDoc}
  	 */
  	public String getDetailedDescription() {
  		if (!isEnabled())
  			return null;
  		
  
  		return NewWizardMessages.PackageExplorerActionGroup_FormText_Edit;
  	}
  	
  	/* (non-Javadoc)
  	 * @see org.eclipse.jface.action.Action#run()
  	 */
  	public void run() {
  		Shell shell= getShell();
  	
  		try {
  			EditFilterWizard wizard= createWizard();
  			wizard.init(PlatformUI.getWorkbench(), new StructuredSelection(getSelectedElements().get(0)));
  			
  			WizardDialog dialog= new WizardDialog(shell, wizard);
  			PixelConverter converter= new PixelConverter(JFaceResources.getDialogFont());
  			dialog.setMinimumPageSize(converter.convertWidthInCharsToPixels(70), converter.convertHeightInCharsToPixels(20));
  			dialog.create();
  			int res= dialog.open();
  			if (res == Window.OK) {
  				BuildpathDelta delta= new BuildpathDelta(getToolTipText());
  				
  				ArrayList newEntries= wizard.getExistingEntries();
  				delta.setNewEntries((CPListElement[])newEntries.toArray(new CPListElement[newEntries.size()]));
  				
  				IResource resource= wizard.getCreatedElement().getCorrespondingResource();
  				delta.addCreatedResource(resource);
  					
  				informListeners(delta);
  				
  				selectAndReveal(new StructuredSelection(wizard.getCreatedElement()));
  			}
  			
  			notifyResult(res == Window.OK);
  		} catch (CoreException e) {
  			String title= NewWizardMessages.AbstractOpenWizardAction_createerror_title; 
  			String message= NewWizardMessages.AbstractOpenWizardAction_createerror_message; 
  			ExceptionHandler.handle(e, shell, title, message);
  		}
  	}
  	
  	private EditFilterWizard createWizard() throws CoreException {
  		IJavaScriptProject javaProject= null;
  		Object firstElement= getSelectedElements().get(0);
  		if (firstElement instanceof IJavaScriptProject) {
  			javaProject= (IJavaScriptProject)firstElement;
  		} else {
  			javaProject= ((IPackageFragmentRoot)firstElement).getJavaScriptProject();
  		}
  		CPListElement[] existingEntries= CPListElement.createFromExisting(javaProject);
  		CPListElement elementToEdit= findElement((IJavaScriptElement)firstElement, existingEntries);
  		return new EditFilterWizard(existingEntries, elementToEdit);
  	}
  	
  	private static CPListElement findElement(IJavaScriptElement element, CPListElement[] elements) {
  		IPath path= element.getPath();
  		for (int i= 0; i < elements.length; i++) {
  			CPListElement cur= elements[i];
  			if (cur.getEntryKind() == IIncludePathEntry.CPE_SOURCE && cur.getPath().equals(path)) {
  				return cur;
  			}
  		}
  		return null;
  	}
  
  	protected boolean canHandle(IStructuredSelection selection) {
  		if (selection.size() != 1)
  			return false;
  		
  		try {
  			Object element= selection.getFirstElement();
  			if (element instanceof IJavaScriptProject) {
  				return ClasspathModifier.isSourceFolder((IJavaScriptProject)element);
  			} else if (element instanceof IPackageFragmentRoot) {
  				IPackageFragmentRoot packageFragmentRoot= ((IPackageFragmentRoot) element);
  				if (packageFragmentRoot.getKind() != IPackageFragmentRoot.K_SOURCE)
  					return false;
  				
  				return packageFragmentRoot.getJavaScriptProject() != null;
  			}
  		} catch (JavaScriptModelException e) {
  		}
  		return false;
  	}
  }
  