/**
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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 org.drools.eclipse.preferences;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.drools.eclipse.util.DroolsRuntime;
import org.drools.eclipse.util.DroolsRuntimeManager;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.debug.internal.ui.SWTFactory;
import org.eclipse.jface.viewers.CheckStateChangedEvent;
import org.eclipse.jface.viewers.CheckboxTableViewer;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.ICheckStateListener;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
public class DroolsRuntimesBlock implements ISelectionProvider {
private Composite fControl;
private List<DroolsRuntime> droolsRuntimes = new ArrayList<DroolsRuntime>();
private CheckboxTableViewer droolsRuntimesList;
private Button fAddButton;
private Button fRemoveButton;
private Button fEditButton;
private ListenerList fSelectionListeners = new ListenerList();
private ISelection fPrevSelection = new StructuredSelection();
private Table fTable;
class DroolsRuntimesContentProvider implements IStructuredContentProvider {
public Object[] getElements(Object input) {
return droolsRuntimes.toArray();
}
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
}
public void dispose() {
}
}
class DroolsRuntimesLabelProvider extends LabelProvider implements ITableLabelProvider {
public String getColumnText(Object element, int columnIndex) {
if (element instanceof DroolsRuntime) {
DroolsRuntime runtime = (DroolsRuntime) element;
switch(columnIndex) {
case 0:
return runtime.getName();
case 1:
return runtime.getPath();
}
}
return element.toString();
}
public Image getColumnImage(Object element, int columnIndex) {
return null;
}
}
public void addSelectionChangedListener(ISelectionChangedListener listener) {
fSelectionListeners.add(listener);
}
public ISelection getSelection() {
return new StructuredSelection(droolsRuntimesList.getCheckedElements());
}
public void removeSelectionChangedListener(ISelectionChangedListener listener) {
fSelectionListeners.remove(listener);
}
public void setSelection(ISelection selection) {
if (selection instanceof IStructuredSelection) {
if (!selection.equals(fPrevSelection)) {
fPrevSelection = selection;
Object runtime = ((IStructuredSelection)selection).getFirstElement();
if (runtime == null) {
droolsRuntimesList.setCheckedElements(new Object[0]);
} else {
droolsRuntimesList.setCheckedElements(new Object[]{runtime});
droolsRuntimesList.reveal(runtime);
}
fireSelectionChanged();
}
}
}
private void fireSelectionChanged() {
SelectionChangedEvent event = new SelectionChangedEvent(this, getSelection());
Object[] listeners = fSelectionListeners.getListeners();
for (int i = 0; i < listeners.length; i++) {
ISelectionChangedListener listener = (ISelectionChangedListener)listeners[i];
listener.selectionChanged(event);
}
}
public void createControl(Composite ancestor) {
Font font = ancestor.getFont();
Composite parent= SWTFactory.createComposite(ancestor, font, 2, 1, GridData.FILL_BOTH);
fControl = parent;
SWTFactory.createLabel(parent, "Installed Drools Runtimes", 2);
fTable = new Table(parent, SWT.CHECK | SWT.BORDER | SWT.MULTI | SWT.FULL_SELECTION);
GridData gd = new GridData(GridData.FILL_BOTH);
gd.heightHint = 250;
gd.widthHint = 350;
fTable.setLayoutData(gd);
fTable.setFont(font);
fTable.setHeaderVisible(true);
fTable.setLinesVisible(true);
TableColumn column = new TableColumn(fTable, SWT.NULL);
column.setText("Name");
int defaultwidth = 350/2 +1;
column.setWidth(defaultwidth);
column = new TableColumn(fTable, SWT.NULL);
column.setText("Location");
column.setWidth(defaultwidth);
droolsRuntimesList = new CheckboxTableViewer(fTable);
droolsRuntimesList.setLabelProvider(new DroolsRuntimesLabelProvider());
droolsRuntimesList.setContentProvider(new DroolsRuntimesContentProvider());
droolsRuntimesList.addSelectionChangedListener(new ISelectionChangedListener() {
public void selectionChanged(SelectionChangedEvent evt) {
enableButtons();
}
});
droolsRuntimesList.addCheckStateListener(new ICheckStateListener() {
public void checkStateChanged(CheckStateChangedEvent event) {
if (event.getChecked()) {
setDefaultDroolsRuntime((DroolsRuntime) event.getElement());
} else {
setDefaultDroolsRuntime(null);
}
}
});
droolsRuntimesList.addDoubleClickListener(new IDoubleClickListener() {
public void doubleClick(DoubleClickEvent e) {
if (!droolsRuntimesList.getSelection().isEmpty()) {
editDroolsRuntime();
}
}
});
fTable.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent event) {
if (event.character == SWT.DEL && event.stateMask == 0) {
if (fRemoveButton.isEnabled()){
removeDroolsRuntimes();
}
}
}
});
Composite buttons = SWTFactory.createComposite(parent, font, 1, 1, GridData.VERTICAL_ALIGN_BEGINNING, 0, 0);
fAddButton = SWTFactory.createPushButton(buttons, "Add...", null);
fAddButton.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event evt) {
addDroolsRuntime();
}
});
fEditButton= SWTFactory.createPushButton(buttons, "Edit...", null);
fEditButton.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event evt) {
editDroolsRuntime();
}
});
fRemoveButton= SWTFactory.createPushButton(buttons, "Remove", null);
fRemoveButton.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event evt) {
removeDroolsRuntimes();
}
});
SWTFactory.createVerticalSpacer(parent, 1);
enableButtons();
fAddButton.setEnabled(true);
}
private void enableButtons() {
IStructuredSelection selection = (IStructuredSelection) droolsRuntimesList.getSelection();
int selectionCount= selection.size();
fEditButton.setEnabled(selectionCount == 1);
fRemoveButton.setEnabled(selectionCount > 0);
}
public Control getControl() {
return fControl;
}
public void setDroolsRuntimes(DroolsRuntime[] runtimes) {
droolsRuntimes.clear();
for (int i = 0; i < runtimes.length; i++) {
droolsRuntimes.add(runtimes[i]);
}
droolsRuntimesList.setInput(droolsRuntimes);
droolsRuntimesList.refresh();
}
public DroolsRuntime[] getDroolsRuntimes() {
DroolsRuntime selected = getDefaultDroolsRuntime();
for (DroolsRuntime runtime: droolsRuntimes) {
runtime.setDefault(runtime.equals(selected));
}
return droolsRuntimes.toArray(new DroolsRuntime[droolsRuntimes.size()]);
}
private void addDroolsRuntime() {
DroolsRuntimeDialog dialog = new DroolsRuntimeDialog(getShell(), droolsRuntimes);
if (dialog.open() == Window.OK) {
DroolsRuntime result = dialog.getResult();
if (result != null) {
DroolsRuntimeManager.recognizeJars(result);
droolsRuntimes.add(result);
droolsRuntimesList.refresh();
droolsRuntimesList.setSelection(new StructuredSelection(result));
}
}
}
private void editDroolsRuntime() {
IStructuredSelection selection= (IStructuredSelection) droolsRuntimesList.getSelection();
DroolsRuntime runtime = (DroolsRuntime) selection.getFirstElement();
if (runtime == null) {
return;
}
DroolsRuntimeDialog dialog = new DroolsRuntimeDialog(getShell(), droolsRuntimes);
dialog.setDroolsRuntime(runtime);
if (dialog.open() == Window.OK) {
DroolsRuntime result = dialog.getResult();
if (result != null) {
DroolsRuntimeManager.recognizeJars(result);
// replace with the edited VM
int index = droolsRuntimes.indexOf(runtime);
droolsRuntimes.remove(index);
droolsRuntimes.add(index, result);
droolsRuntimesList.refresh();
droolsRuntimesList.setSelection(new StructuredSelection(result));
}
}
}
private void removeDroolsRuntimes() {
IStructuredSelection selection= (IStructuredSelection) droolsRuntimesList.getSelection();
DroolsRuntime[] runtimes = new DroolsRuntime[selection.size()];
Iterator<?> iter = selection.iterator();
int i = 0;
while (iter.hasNext()) {
runtimes[i] = (DroolsRuntime) iter.next();
i++;
}
removeDroolsRuntimes(runtimes);
}
public void removeDroolsRuntimes(DroolsRuntime[] runtimes) {
IStructuredSelection prev = (IStructuredSelection) getSelection();
for (int i = 0; i < runtimes.length; i++) {
droolsRuntimes.remove(runtimes[i]);
}
droolsRuntimesList.refresh();
IStructuredSelection curr = (IStructuredSelection) getSelection();
if (!curr.equals(prev)) {
runtimes = getDroolsRuntimes();
if (curr.size() == 0 && runtimes.length == 1) {
setSelection(new StructuredSelection(runtimes[0]));
} else {
fireSelectionChanged();
}
}
}
protected Shell getShell() {
return getControl().getShell();
}
public void setDefaultDroolsRuntime(DroolsRuntime runtime) {
if (runtime == null) {
setSelection(new StructuredSelection());
} else {
setSelection(new StructuredSelection(runtime));
}
}
public DroolsRuntime getDefaultDroolsRuntime() {
Object[] objects = droolsRuntimesList.getCheckedElements();
if (objects.length == 0) {
return null;
}
return (DroolsRuntime) objects[0];
}
}