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/*******************************************************************************
* Copyright (c) 2008-2010 Sonatype, Inc.
* 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:
* Sonatype, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.m2e.core.ui.internal.wizards;
import java.util.ArrayList;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.ui.dialogs.FilteredTree;
import org.eclipse.ui.dialogs.PatternFilter;
import org.eclipse.ui.model.WorkbenchLabelProvider;
import org.eclipse.m2e.core.internal.IMavenConstants;
import org.eclipse.m2e.core.ui.internal.Messages;
import org.eclipse.m2e.core.ui.internal.dialogs.AbstractMavenDialog;
/**
* A simple dialog allowing the selection of Maven projects and subfolders containing POMs.
*/
public class MavenProjectSelectionDialog extends AbstractMavenDialog {
private static final Logger log = LoggerFactory.getLogger(MavenProjectSelectionDialog.class);
protected static final String DIALOG_SETTINGS = MavenProjectSelectionDialog.class.getName();
protected static final long SEARCH_DELAY = 500L; //in milliseconds
private FilteredTree filteredTree;
private boolean useCheckboxTree;
/** Creates a dialog instance. */
public MavenProjectSelectionDialog(Shell parent, boolean useCheckboxTree) {
this(parent);
this.useCheckboxTree = useCheckboxTree;
}
/** Creates a dialog instance. */
public MavenProjectSelectionDialog(Shell parent) {
super(parent, DIALOG_SETTINGS);
setShellStyle(getShellStyle() | SWT.RESIZE);
setTitle(Messages.projectSelectionDialogTitle);
}
/** Produces the result of the selection. */
protected void computeResult() {
if(useCheckboxTree) {
List<Object> result = new ArrayList<Object>();
collectCheckedItems(getViewer().getTree().getItems(), result);
setResult(result);
} else {
setResult(((IStructuredSelection) getViewer().getSelection()).toList());
}
}
private void collectCheckedItems(TreeItem[] items, List<Object> list) {
for(TreeItem item : items) {
if(item.getChecked()) {
Object data = item.getData();
if(data != null) {
list.add(data);
}
}
collectCheckedItems(item.getItems(), list);
}
}
/** Creates the dialog controls. */
protected Control createDialogArea(Composite parent) {
readSettings();
Composite composite = (Composite) super.createDialogArea(parent);
filteredTree = new FilteredTree(composite, SWT.BORDER | (useCheckboxTree ? SWT.CHECK : 0), new PatternFilter(),
true);
filteredTree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
getViewer().setContentProvider(new MavenContainerContentProvider());
getViewer().setLabelProvider(WorkbenchLabelProvider.getDecoratingWorkbenchLabelProvider());
getViewer().setInput(ResourcesPlugin.getWorkspace());
getViewer().addDoubleClickListener(new IDoubleClickListener() {
public void doubleClick(DoubleClickEvent event) {
okPressed();
}
});
return composite;
}
protected void okPressed() {
super.okPressed();
}
protected TreeViewer getViewer() {
return filteredTree.getViewer();
}
/** The content provider class. */
protected static class MavenContainerContentProvider implements ITreeContentProvider {
/** Returns the children of the parent node. */
public Object[] getChildren(Object parent) {
if(parent instanceof IWorkspace) {
IProject[] projects = ((IWorkspace) parent).getRoot().getProjects();
List<IProject> children = new ArrayList<IProject>();
for(IProject project : projects) {
try {
if(project.isOpen() && project.hasNature(IMavenConstants.NATURE_ID)) {
children.add(project);
}
} catch(CoreException e) {
log.error("Error checking project: " + e.getMessage(), e);
}
}
return children.toArray();
} else if(parent instanceof IContainer) {
IContainer container = (IContainer) parent;
if(container.isAccessible()) {
try {
List<IResource> children = new ArrayList<IResource>();
IResource[] members = container.members();
for(int i = 0; i < members.length; i++ ) {
if(members[i] instanceof IContainer
&& ((IContainer) members[i]).exists(new Path(IMavenConstants.POM_FILE_NAME))) {
children.add(members[i]);
}
}
return children.toArray();
} catch(CoreException e) {
log.error("Error checking container: " + e.getMessage(), e);
}
}
}
return new Object[0];
}
/** Returns the parent of the given element. */
public Object getParent(Object element) {
if(element instanceof IResource) {
return ((IResource) element).getParent();
}
return null;
}
/** Returns true if the element has any children. */
public boolean hasChildren(Object element) {
return getChildren(element).length > 0;
}
/** Disposes of any resources used. */
public void dispose() {
}
/** Handles the input change. */
public void inputChanged(Viewer viewer, Object arg1, Object arg2) {
}
/** Returns the elements of the given root. */
public Object[] getElements(Object element) {
return getChildren(element);
}
}
}
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