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/*******************************************************************************
* Copyright (c) 2008, 2010 Oracle. 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:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.ui.internal.widgets;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.internal.ui.refactoring.contentassist.ControlContentAssistHelper;
import org.eclipse.jdt.internal.ui.refactoring.contentassist.JavaPackageCompletionProcessor;
import org.eclipse.jdt.ui.JavaElementLabelProvider;
import org.eclipse.jdt.ui.JavaUI;
import org.eclipse.jface.fieldassist.FieldDecorationRegistry;
import org.eclipse.jface.window.Window;
import org.eclipse.jpt.core.JpaProject;
import org.eclipse.jpt.core.internal.utility.jdt.JDTTools;
import org.eclipse.jpt.ui.JptUiPlugin;
import org.eclipse.jpt.ui.internal.JptUiMessages;
import org.eclipse.jpt.ui.internal.listeners.SWTPropertyChangeListenerWrapper;
import org.eclipse.jpt.utility.model.Model;
import org.eclipse.jpt.utility.model.event.PropertyChangeEvent;
import org.eclipse.jpt.utility.model.listener.PropertyChangeListener;
import org.eclipse.jpt.utility.model.value.PropertyValueModel;
import org.eclipse.jpt.utility.model.value.WritablePropertyValueModel;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.dialogs.SelectionDialog;
/**
* This chooser allows the user to choose a package when browsing and it adds
* code completion support to the text field, which is the main component.
* <p>
* Here the layout of this pane:
* <pre>
* -----------------------------------------------------------------------------
* | !---------------------------------------------------- ------------- |
* | Label: | I | | Browse... | |
* | ---------------------------------------------------- ------------- |
* -----------------------------------------------------------------------------</pre>
*
* @version 2.0
* @since 2.0
*/
public abstract class PackageChooserPane<T extends Model> extends ChooserPane<T>
{
/**
* The code completion manager.
*/
private JavaPackageCompletionProcessor javaPackageCompletionProcessor;
private PropertyChangeListener subjectChangeListener;
/**
* Creates a new <code>PackageChooserPane</code>.
*
* @param parentPane The parent pane of this one
* @param parent The parent container
*/
public PackageChooserPane(Pane<? extends T> parentPane,
Composite parent) {
super(parentPane, parent);
}
/**
* Creates a new <code>PackageChooserPane</code>.
*
* @param parentPane The parent container of this one
* @param subjectHolder The holder of this pane's subject
* @param parent The parent container
*/
public PackageChooserPane(Pane<?> parentPane,
PropertyValueModel<? extends T> subjectHolder,
Composite parent) {
super(parentPane, subjectHolder, parent);
}
@Override
protected void initialize() {
super.initialize();
// TODO bug 156185 - when this is fixed there should be api for this
this.javaPackageCompletionProcessor = new JavaPackageCompletionProcessor(
new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_ROOT)
);
this.subjectChangeListener = this.buildSubjectChangeListener();
this.getSubjectHolder().addPropertyChangeListener(PropertyValueModel.VALUE, this.subjectChangeListener);
this.packageChooserSubjectChanged(getSubject());
}
private PropertyChangeListener buildSubjectChangeListener() {
return new SWTPropertyChangeListenerWrapper(this.buildSubjectChangeListener_());
}
private PropertyChangeListener buildSubjectChangeListener_() {
return new PropertyChangeListener() {
@SuppressWarnings("unchecked")
public void propertyChanged(PropertyChangeEvent e) {
PackageChooserPane.this.packageChooserSubjectChanged((T) e.getNewValue());
}
};
}
protected void packageChooserSubjectChanged(T newSubject) {
IPackageFragmentRoot root = null;
if (newSubject != null) {
root = getPackageFragmentRoot();
}
this.javaPackageCompletionProcessor.setPackageFragmentRoot(root);
}
@Override
protected final Runnable buildBrowseAction() {
return new Runnable() {
public void run() {
promptPackage();
}
};
}
@Override
protected Control addMainControl(Composite container) {
Composite subPane = addSubPane(container);
Text text = addText(subPane, buildTextHolder());
Image image = FieldDecorationRegistry.getDefault().getFieldDecoration(FieldDecorationRegistry.DEC_CONTENT_PROPOSAL).getImage();
GridData data = new GridData(GridData.FILL_HORIZONTAL);
data.horizontalIndent = image.getBounds().width;
text.setLayoutData(data);
ControlContentAssistHelper.createTextContentAssistant(
text,
javaPackageCompletionProcessor
);
return subPane;
}
/**
* Creates the value holder of the subject's property.
*
* @return The holder of the package name
*/
protected abstract WritablePropertyValueModel<String> buildTextHolder();
/**
* Prompts the user the Open Package dialog.
*
* @return Either the selected package or <code>null</code> if the user
* cancelled the dialog
*/
protected IPackageFragment choosePackage() {
SelectionDialog selectionDialog;
try {
selectionDialog = JavaUI.createPackageDialog(
getShell(),
getPackageFragmentRoot()
);
}
catch (JavaModelException e) {
JptUiPlugin.log(e);
return null;
}
selectionDialog.setTitle(JptUiMessages.PackageChooserPane_dialogTitle);
selectionDialog.setMessage(JptUiMessages.PackageChooserPane_dialogMessage);
IPackageFragment pack = getPackageFragment();
if (pack != null) {
selectionDialog.setInitialSelections(new Object[] { pack });
}
if (selectionDialog.open() == Window.OK) {
return (IPackageFragment) selectionDialog.getResult()[0];
}
return null;
}
protected abstract JpaProject getJpaProject();
/**
* Returns the package name from its subject.
*
* @return The package name or <code>null</code> if none is defined
*/
protected abstract String getPackageName();
/**
* The browse button was clicked, its action invokes this action which should
* prompt the user to select a package and set it.
*/
protected void promptPackage() {
IPackageFragment packageFragment = choosePackage();
if (packageFragment != null) {
String packageName = packageFragment.getElementName();
this.setPackageName(packageName);
}
}
protected abstract void setPackageName(String packageName);
private IPackageFragment getPackageFragment() {
String packageName = getPackageName();
if (packageName == null) {
return null;
}
return getPackageFragmentRoot().getPackageFragment(packageName);
}
protected IPackageFragmentRoot getPackageFragmentRoot() {
return JDTTools.getCodeCompletionContextRoot(getJpaProject().getJavaProject());
}
@Override
public void dispose() {
this.getSubjectHolder().removePropertyChangeListener(PropertyValueModel.VALUE, this.subjectChangeListener);
super.dispose();
}
}
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