/*******************************************************************************
* Copyright 2011 Google Inc. All Rights Reserved.
*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package com.google.gdt.eclipse.designer.wizards.model.common;
import com.google.gdt.eclipse.designer.util.Utils;
import org.eclipse.wb.internal.core.DesignerPlugin;
import org.eclipse.wb.internal.core.utils.dialogfields.DialogField;
import org.eclipse.wb.internal.core.utils.dialogfields.IStringButtonAdapter;
import org.eclipse.wb.internal.core.utils.dialogfields.StatusUtils;
import org.eclipse.wb.internal.core.utils.dialogfields.StringButtonDialogField;
import org.eclipse.wb.internal.core.utils.reflect.ReflectionUtils;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.ui.JavaElementLabelProvider;
import org.eclipse.jdt.ui.StandardJavaElementContentProvider;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;
import org.eclipse.ui.dialogs.ISelectionStatusValidator;
/**
* {@link DialogField} for selecting package in "client" part of GWT application.
*
* @author scheglov_ke
* @coverage gwt.wizard.ui
*/
public final class ClientPackageSelectionDialogField extends StringButtonDialogField {
private IPackageFragment m_packageFragment;
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public ClientPackageSelectionDialogField(String label, String buttonLabel) {
super(new ButtonAdapter());
setLabelText(label);
setButtonLabel(buttonLabel);
}
////////////////////////////////////////////////////////////////////////////
//
// Access
//
////////////////////////////////////////////////////////////////////////////
public void setPackageFragment(IPackageFragment packageFragment) {
m_packageFragment = packageFragment;
setText(getPackageString(m_packageFragment));
}
public IPackageFragment getPackageFragment() {
return m_packageFragment;
}
////////////////////////////////////////////////////////////////////////////
//
// DialogField
//
////////////////////////////////////////////////////////////////////////////
@Override
public Control[] doFillIntoGrid(Composite parent, int nColumns) {
Control[] controls = super.doFillIntoGrid(parent, nColumns);
getTextControl(null).setEnabled(false);
return controls;
}
////////////////////////////////////////////////////////////////////////////
//
// Utils
//
////////////////////////////////////////////////////////////////////////////
/**
* Return strings presentation of package.
*/
private static String getPackageString(IPackageFragment packageFragment) {
try {
if (packageFragment != null) {
IPackageFragmentRoot packageFragmentRoot =
(IPackageFragmentRoot) packageFragment.getParent();
IJavaProject javaProject = packageFragmentRoot.getJavaProject();
if (packageFragmentRoot.getUnderlyingResource() == javaProject.getUnderlyingResource()) {
return javaProject.getElementName() + "/" + packageFragment.getElementName();
} else {
return javaProject.getElementName()
+ "/"
+ packageFragmentRoot.getElementName()
+ "/"
+ packageFragment.getElementName();
}
}
return "";
} catch (Throwable e) {
throw ReflectionUtils.propagate(e);
}
}
////////////////////////////////////////////////////////////////////////////
//
// Button adapter
//
////////////////////////////////////////////////////////////////////////////
private static class ButtonAdapter implements IStringButtonAdapter {
////////////////////////////////////////////////////////////////////////////
//
// IStringButtonAdapter
//
////////////////////////////////////////////////////////////////////////////
public void changeControlPressed(DialogField field) {
ClientPackageSelectionDialogField receiver = (ClientPackageSelectionDialogField) field;
IPackageFragment packageFragment = selectClientPackage(receiver.getPackageFragment());
if (packageFragment != null) {
receiver.setPackageFragment(packageFragment);
}
}
////////////////////////////////////////////////////////////////////////////
//
// Select source folder
//
////////////////////////////////////////////////////////////////////////////
private IPackageFragment selectClientPackage(IPackageFragment initialSelection) {
Shell shell = Display.getCurrent().getActiveShell();
ILabelProvider labelProvider =
new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_DEFAULT);
ITreeContentProvider contentProvider = new StandardJavaElementContentProvider();
ElementTreeSelectionDialog dialog =
new ElementTreeSelectionDialog(shell, labelProvider, contentProvider);
//
dialog.setTitle("Source folder selection");
dialog.setMessage("Choose a source folder:");
dialog.setComparator(new ViewerComparator());
// set validator to accept only package selection
dialog.setValidator(new ISelectionStatusValidator() {
public IStatus validate(Object[] selection) {
if (selection.length == 1) {
Object element = selection[0];
if (isElementValid(element)) {
return StatusUtils.OK_STATUS;
}
}
return StatusUtils.ERROR_STATUS;
}
private boolean isElementValid(Object element) {
if (element instanceof IPackageFragment) {
IPackageFragment packageFragment = (IPackageFragment) element;
try {
return Utils.isModuleSourcePackage(packageFragment);
} catch (Throwable e) {
DesignerPlugin.log(e);
}
}
return false;
}
});
// set filter to show only GWT projects and client packages
dialog.addFilter(new ViewerFilter() {
@Override
public boolean select(Viewer viewer, Object parentElement, Object element) {
try {
if (element instanceof IJavaProject) {
return Utils.isGWTProject((IJavaProject) element);
}
if (element instanceof IPackageFragmentRoot) {
return ((IPackageFragmentRoot) element).getKind() == IPackageFragmentRoot.K_SOURCE;
}
if (element instanceof IPackageFragment) {
IPackageFragment packageFragment = (IPackageFragment) element;
return Utils.isModuleSourcePackage(packageFragment);
}
} catch (Throwable e) {
DesignerPlugin.log(e);
}
return false;
}
});
// configure input and initial selection
dialog.setInput(JavaCore.create(ResourcesPlugin.getWorkspace().getRoot()));
dialog.setInitialSelection(initialSelection);
// open and return result
if (dialog.open() == Window.OK) {
return (IPackageFragment) dialog.getFirstResult();
}
return null;
}
}
}