org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/newsourcepage/CreateLinkedSourceFolderAction.java

/*******************************************************************************
 * Copyright (c) 2000, 2011 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.jdt.internal.ui.wizards.buildpaths.newsourcepage;

import java.util.ArrayList;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;

import org.eclipse.jface.layout.PixelConverter;
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.ui.IWorkbenchSite;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.part.ISetSelectionTarget;

import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;

import org.eclipse.jdt.internal.corext.buildpath.BuildpathDelta;

import org.eclipse.jdt.ui.PreferenceConstants;

import org.eclipse.jdt.internal.ui.JavaPluginImages;
import org.eclipse.jdt.internal.ui.util.ExceptionHandler;
import org.eclipse.jdt.internal.ui.wizards.NewWizardMessages;
import org.eclipse.jdt.internal.ui.wizards.buildpaths.AddSourceFolderWizard;
import org.eclipse.jdt.internal.ui.wizards.buildpaths.CPListElement;


//SelectedElements iff enabled: IJavaProject && size == 1
public class CreateLinkedSourceFolderAction extends BuildpathModifierAction {

	public CreateLinkedSourceFolderAction(IWorkbenchSite site) {
		this(site, null, PlatformUI.getWorkbench().getProgressService());
	}

	public CreateLinkedSourceFolderAction(IRunnableContext context, ISetSelectionTarget selectionTarget) {
		this(null, selectionTarget, context);
    }

	private CreateLinkedSourceFolderAction(IWorkbenchSite site, ISetSelectionTarget selectionTarget, IRunnableContext context) {
		super(site, selectionTarget, BuildpathModifierAction.CREATE_LINK);

		setText(NewWizardMessages.NewSourceContainerWorkbookPage_ToolBar_Link_label);
		setToolTipText(NewWizardMessages.NewSourceContainerWorkbookPage_ToolBar_Link_tooltip);
		setImageDescriptor(JavaPluginImages.DESC_ELCL_ADD_LINKED_SOURCE_TO_BUILDPATH);
		setDescription(NewWizardMessages.PackageExplorerActionGroup_FormText_createLinkedFolder);
	}

	@Override
	public String getDetailedDescription() {
		return NewWizardMessages.PackageExplorerActionGroup_FormText_createLinkedFolder;
	}

	@Override
	public void run() {
		Shell shell= getShell();

		try {
			IJavaProject javaProject= (IJavaProject)getSelectedElements().get(0);

			CPListElement newEntrie= new CPListElement(javaProject, IClasspathEntry.CPE_SOURCE);
            CPListElement[] existing= CPListElement.createFromExisting(javaProject);
            boolean isProjectSrcFolder= CPListElement.isProjectSourceFolder(existing, javaProject);

			AddSourceFolderWizard wizard= new AddSourceFolderWizard(existing, newEntrie, getOutputLocation(javaProject), true, false, false, isProjectSrcFolder, isProjectSrcFolder);
			wizard.init(PlatformUI.getWorkbench(), new StructuredSelection(javaProject));

			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<CPListElement> newEntries= wizard.getExistingEntries();
				delta.setNewEntries(newEntries.toArray(new CPListElement[newEntries.size()]));

				IResource resource= wizard.getCreatedElement().getCorrespondingResource();
				delta.addCreatedResource(resource);

				delta.setDefaultOutputLocation(wizard.getOutputLocation());

				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 IPath getOutputLocation(IJavaProject javaProject) {
    	try {
			return javaProject.getOutputLocation();
		} catch (CoreException e) {
			IProject project= javaProject.getProject();
			IPath projPath= project.getFullPath();
			return projPath.append(PreferenceConstants.getPreferenceStore().getString(PreferenceConstants.SRCBIN_BINNAME));
		}
    }

    @Override
	protected boolean canHandle(IStructuredSelection selection) {
    	if (selection.size() != 1)
    		return false;

    	if (!(selection.getFirstElement() instanceof IJavaProject))
    		return false;

    	return true;
    }
}