/*
* Copyright (c) 2004-2006 Marco Maccaferri 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:
* Marco Maccaferri - initial API and implementation
*/
package org.eclipsetrader.news.internal.preferences;
import java.io.File;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.ValidationEvent;
import javax.xml.bind.ValidationEventHandler;
import javax.xml.namespace.QName;
import javax.xml.transform.stream.StreamSource;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.CheckStateChangedEvent;
import org.eclipse.jface.viewers.CheckboxTableViewer;
import org.eclipse.jface.viewers.ICheckStateListener;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Spinner;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.eclipsetrader.news.internal.Activator;
import org.eclipsetrader.news.internal.connectors.FeedSource;
import org.eclipsetrader.news.internal.connectors.RSSNewsProvider;
public class RSSPreferencesPage extends PreferencePage implements IWorkbenchPreferencePage {
private Spinner interval;
private CheckboxTableViewer table;
private Button editButton;
private Button removeButton;
private List<FeedSource> list = new ArrayList<FeedSource>();
/* (non-Javadoc)
* @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)
*/
@Override
public void init(IWorkbench workbench) {
}
/* (non-Javadoc)
* @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite)
*/
@Override
protected Control createContents(Composite parent) {
Composite content = new Composite(parent, SWT.NONE);
GridLayout gridLayout = new GridLayout(2, false);
gridLayout.marginWidth = gridLayout.marginHeight = 0;
content.setLayout(gridLayout);
Composite group = new Composite(content, SWT.NONE);
gridLayout = new GridLayout();
gridLayout.numColumns = 3;
gridLayout.marginWidth = gridLayout.marginHeight = 0;
group.setLayout(gridLayout);
group.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false, 2, 1));
Label label = new Label(group, SWT.NONE);
label.setText(Messages.RSSPreferencesPage_AutoUpdate);
interval = new Spinner(group, SWT.BORDER);
interval.setMinimum(1);
interval.setMaximum(9999);
label = new Label(group, SWT.NONE);
label.setText(Messages.RSSPreferencesPage_Minutes);
label = new Label(group, SWT.NONE);
label.setText(Messages.RSSPreferencesPage_Subscriptions);
label.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false, 2, 1));
createViewer(content);
group = new Composite(content, SWT.NONE);
gridLayout = new GridLayout(1, false);
gridLayout.marginWidth = gridLayout.marginHeight = 0;
group.setLayout(gridLayout);
group.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false));
Button button = new Button(group, SWT.PUSH);
button.setText(Messages.RSSPreferencesPage_Add);
button.setLayoutData(new GridData(80, SWT.DEFAULT));
button.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
RSSFeedDialog dlg = new RSSFeedDialog(getShell());
if (dlg.open() == Window.OK) {
FeedSource feedSource = dlg.getFeedSource();
feedSource.setEnabled(true);
list.add(feedSource);
table.refresh();
table.setChecked(feedSource, feedSource.isEnabled());
table.setSelection(new StructuredSelection(feedSource), true);
}
}
});
editButton = new Button(group, SWT.PUSH);
editButton.setText(Messages.RSSPreferencesPage_Edit);
editButton.setEnabled(false);
editButton.setLayoutData(new GridData(80, SWT.DEFAULT));
editButton.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
IStructuredSelection selection = (IStructuredSelection) table.getSelection();
FeedSource feedSource = (FeedSource) selection.getFirstElement();
RSSFeedDialog dlg = new RSSFeedDialog(getShell());
dlg.setFeedSource(feedSource);
if (dlg.open() == Window.OK) {
table.refresh();
}
}
});
removeButton = new Button(group, SWT.PUSH);
removeButton.setText(Messages.RSSPreferencesPage_Remove);
removeButton.setEnabled(false);
removeButton.setLayoutData(new GridData(80, SWT.DEFAULT));
removeButton.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
IStructuredSelection selection = (IStructuredSelection) table.getSelection();
list.removeAll(selection.toList());
table.remove(selection.toArray());
}
});
performDefaults();
return content;
}
protected void createViewer(Composite parent) {
table = CheckboxTableViewer.newCheckList(parent, SWT.SINGLE | SWT.BORDER | SWT.FULL_SELECTION);
table.getTable().setHeaderVisible(false);
table.getTable().setLinesVisible(false);
GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
gridData.heightHint = table.getTable().getItemHeight() * 15 + table.getTable().getBorderWidth() * 2;
table.getControl().setLayoutData(gridData);
table.setContentProvider(new ArrayContentProvider());
table.setLabelProvider(new LabelProvider() {
@Override
public String getText(Object element) {
return ((FeedSource) element).getName();
}
});
table.setSorter(new ViewerSorter());
table.setInput(list);
table.addSelectionChangedListener(new ISelectionChangedListener() {
@Override
public void selectionChanged(SelectionChangedEvent event) {
editButton.setEnabled(((IStructuredSelection) table.getSelection()).size() == 1);
removeButton.setEnabled(!table.getSelection().isEmpty());
}
});
table.addCheckStateListener(new ICheckStateListener() {
@Override
public void checkStateChanged(CheckStateChangedEvent event) {
((FeedSource) event.getElement()).setEnabled(event.getChecked());
}
});
}
/* (non-Javadoc)
* @see org.eclipse.jface.preference.PreferencePage#performOk()
*/
@Override
public boolean performOk() {
IPreferenceStore store = Activator.getDefault().getPreferenceStore();
store.setValue(Activator.PREFS_UPDATE_INTERVAL, interval.getSelection());
try {
File file = Activator.getDefault().getStateLocation().append(RSSNewsProvider.HEADLINES_FILE).toFile();
if (file.exists()) {
file.delete();
}
JAXBContext jaxbContext = JAXBContext.newInstance(FeedSource[].class);
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setEventHandler(new ValidationEventHandler() {
@Override
public boolean handleEvent(ValidationEvent event) {
Status status = new Status(IStatus.WARNING, Activator.PLUGIN_ID, 0, "Error validating XML: " + event.getMessage(), null); //$NON-NLS-1$
Activator.getDefault().getLog().log(status);
return true;
}
});
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
marshaller.setProperty(Marshaller.JAXB_ENCODING, System.getProperty("file.encoding")); //$NON-NLS-1$
JAXBElement<FeedSource[]> element = new JAXBElement<FeedSource[]>(new QName("list"), FeedSource[].class, list.toArray(new FeedSource[list.size()]));
marshaller.marshal(element, new FileWriter(file));
} catch (Exception e) {
Status status = new Status(IStatus.WARNING, Activator.PLUGIN_ID, 0, "Error saving RSS subscriptions", null); //$NON-NLS-1$
Activator.getDefault().getLog().log(status);
}
return super.performOk();
}
/* (non-Javadoc)
* @see org.eclipse.jface.preference.PreferencePage#performDefaults()
*/
@Override
protected void performDefaults() {
IPreferenceStore store = Activator.getDefault().getPreferenceStore();
interval.setSelection(store.getInt(Activator.PREFS_UPDATE_INTERVAL));
FeedSource[] sources = getSources();
list.clear();
list.addAll(Arrays.asList(sources));
table.refresh();
for (int i = 0; i < sources.length; i++) {
table.setChecked(sources[i], sources[i].isEnabled());
}
super.performDefaults();
}
protected FeedSource[] getSources() {
try {
File file = Activator.getDefault().getStateLocation().append(RSSNewsProvider.HEADLINES_FILE).toFile();
if (file.exists()) {
JAXBContext jaxbContext = JAXBContext.newInstance(FeedSource[].class);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setEventHandler(new ValidationEventHandler() {
@Override
public boolean handleEvent(ValidationEvent event) {
Status status = new Status(IStatus.WARNING, Activator.PLUGIN_ID, 0, "Error validating XML: " + event.getMessage(), null); //$NON-NLS-1$
Activator.getDefault().getLog().log(status);
return true;
}
});
JAXBElement<FeedSource[]> element = unmarshaller.unmarshal(new StreamSource(file), FeedSource[].class);
return element.getValue();
}
} catch (Exception e) {
Status status = new Status(IStatus.WARNING, Activator.PLUGIN_ID, 0, "Error reading RSS subscriptions", null); //$NON-NLS-1$
Activator.getDefault().getLog().log(status);
}
return new FeedSource[0];
}
}