/*******************************************************************************
* Copyright (c) 2015 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.e4.demo.cssbridge.ui.views;
import static org.eclipse.e4.demo.cssbridge.util.ViewUtils.getDisplay;
import java.util.Collections;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.e4.demo.cssbridge.core.IMailService;
import org.eclipse.e4.demo.cssbridge.model.FolderType;
import org.eclipse.e4.demo.cssbridge.model.Importance;
import org.eclipse.e4.demo.cssbridge.model.Mail;
import org.eclipse.e4.demo.cssbridge.model.TreeItem;
import org.eclipse.e4.demo.cssbridge.util.DateUtils;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.TreeSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.SashForm;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Link;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.ISelectionListener;
import org.eclipse.ui.ISelectionService;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.IViewSite;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.part.ViewPart;
public class FolderPreviewView extends ViewPart {
public static final String ID = "org.eclipse.e4.demo.cssbridge.ui.views.folderPreviewView";
private static final String[] VIEWER_COLUMN_NAMES = { "Importance", "Sender", "Subject", "Date" };
private Composite messageBodyComposite;
private Text messageText;
private Label subjectLabel;
private Label dateLabel;
private Link senderLink;
private ISelectionService selectionService;
private IMailService mailService;
private TableViewer viewer;
private ISelectionListener mailFolderChangedListener = new ISelectionListener() {
@Override
public void selectionChanged(IWorkbenchPart part, ISelection selection) {
if (part instanceof FoldersView && selection instanceof StructuredSelection) {
Object selected = ((TreeSelection) selection).getFirstElement();
if (selected instanceof TreeItem && ((TreeItem) selected).getValue() instanceof FolderType) {
updateMailFolder((FolderType) ((TreeItem) selected).getValue());
}
}
}
};
private Listener tableItemPaintListener = new ItemPaintListener<TableItem>() {
@Override
protected String getText(TableItem item, int index) {
return item.getText(index);
}
@Override
protected Rectangle getBounds(TableItem item, int index) {
return item.getBounds(index);
}
@Override
protected Rectangle getParentBounds(TableItem item) {
return item.getParent().getBounds();
}
@Override
protected Font getFont(TableItem item) {
return item.getFont();
}
@Override
protected Image getImage(TableItem item, int index) {
if (index == 0 && item.getImage() != null) {
return item.getImage();
}
return null;
}
@Override
protected int calculateTextLeftPadding(TableItem item, int index) {
return 7;
}
};
private SelectionAdapter tableSelectionChangedListener = new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
Object data = e.item.getData();
updateMailBody(data instanceof Mail ? (Mail) data : null);
}
};
private Listener shellReskinListener = new Listener() {
@Override
public void handleEvent(Event event) {
viewer.refresh();
refreshControl(messageBodyComposite);
messageText.setBackground(viewer.getTable().getBackground());
}
};
private SelectionAdapter senderLinkSelectionAdapter = new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
MessageDialog.openInformation(getSite().getShell(), "Not Implemented",
"Imagine the address book or a new message being created now.");
}
};
private PaintListener senderLinkPaintListener = new PaintListener() {
private Pattern HREF_TAG_PATTERN = Pattern.compile("<a>(.+)</a>");
@Override
public void paintControl(PaintEvent e) {
Link link = (Link) e.widget;
e.gc.setForeground(Theme.getColor(Theme.Shell.LINK_FOREGROUND));
e.gc.setBackground(link.getBackground());
e.gc.fillRectangle(link.getBounds());
e.gc.drawText(trimTags(link.getText()), e.x, e.y, true);
}
private String trimTags(String linkText) {
Matcher matcher = HREF_TAG_PATTERN.matcher(linkText);
if (matcher.find() && matcher.groupCount() > 0) {
return matcher.group(1);
}
return linkText;
}
};
@Override
public void init(IViewSite site) throws PartInitException {
super.init(site);
selectionService = site.getService(ISelectionService.class);
selectionService.addPostSelectionListener(mailFolderChangedListener);
mailService = site.getService(IMailService.class);
}
@Override
public void dispose() {
selectionService.removePostSelectionListener(mailFolderChangedListener);
getDisplay(getSite()).removeListener(SWT.Skin, shellReskinListener);
if (!viewer.getTable().isDisposed()) {
viewer.getTable().removeListener(SWT.PaintItem, tableItemPaintListener);
viewer.getTable().removeSelectionListener(tableSelectionChangedListener);
}
if (!senderLink.isDisposed()) {
senderLink.removeSelectionListener(senderLinkSelectionAdapter);
senderLink.removePaintListener(senderLinkPaintListener);
}
super.dispose();
}
@Override
public void createPartControl(Composite parent) {
SashForm form = new SashForm(parent, SWT.VERTICAL);
form.setLayout(new FillLayout());
createMessageListComposite(form);
createMessageBodyComposite(form);
}
private void createMessageListComposite(Composite parent) {
viewer = new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION | SWT.BORDER);
viewer.getTable().setHeaderVisible(true);
viewer.setContentProvider(ArrayContentProvider.getInstance());
viewer.getTable().addSelectionListener(tableSelectionChangedListener);
viewer.getTable().addListener(SWT.PaintItem, tableItemPaintListener);
getDisplay(getSite()).addListener(SWT.Skin, shellReskinListener);
for (int i = 0; i < VIEWER_COLUMN_NAMES.length; i++) {
TableViewerColumn column = new TableViewerColumn(viewer, SWT.NONE);
column.getColumn().setText(VIEWER_COLUMN_NAMES[i]);
column.setLabelProvider(new ColumnLabelProviderExt(i));
}
}
private void updateMailFolder(FolderType folderType) {
List<Mail> mails = mailService.getMails(folderType);
viewer.setInput(mails != null ? mails : Collections.emptyList());
for (TableColumn column : viewer.getTable().getColumns()) {
column.pack();
}
if (!mails.isEmpty()) {
viewer.setSelection(new StructuredSelection(mails.get(0)));
updateMailBody(mails.get(0));
} else {
updateMailBody(null);
}
}
private void updateMailBody(Mail mail) {
if (mail != null) {
messageText.setText(mail.getBody());
subjectLabel.setText(mail.getSubject());
senderLink.setText(String.format("<a>%s</a>", mail.getSender()));
dateLabel.setText(DateUtils.toString(mail.getDate()));
}
messageBodyComposite.setVisible(mail != null);
messageBodyComposite.getParent().layout();
}
private void refreshControl(org.eclipse.swt.widgets.Control control) {
if (control instanceof Composite) {
for (Control child : ((Composite) control).getChildren()) {
refreshControl(child);
}
} else {
control.setForeground(Theme.getColor(Theme.Shell.TEXT_AND_LABEL_FOREGROUND));
}
}
private void createMessageBodyComposite(Composite parent) {
messageBodyComposite = new Composite(parent, SWT.NONE);
GridLayout layout = new GridLayout();
layout.marginHeight = 0;
layout.marginWidth = 0;
messageBodyComposite.setLayout(layout);
// top banner
Composite banner = new Composite(messageBodyComposite, SWT.NONE);
banner.setLayoutData(
new GridData(GridData.HORIZONTAL_ALIGN_FILL, GridData.VERTICAL_ALIGN_BEGINNING, true, false));
layout = new GridLayout();
layout.marginHeight = 5;
layout.marginWidth = 10;
layout.numColumns = 2;
banner.setLayout(layout);
// setup bold font
Font boldFont = JFaceResources.getFontRegistry().getBold(JFaceResources.DEFAULT_FONT);
Label l = new Label(banner, SWT.NONE);
l.setText("Subject:");
l.setFont(boldFont);
l.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false));
l.setForeground(Theme.getColor(Theme.Shell.TEXT_AND_LABEL_FOREGROUND));
GridData gridData = new GridData(SWT.BEGINNING, SWT.BEGINNING, true, false);
gridData.minimumWidth = 100;
subjectLabel = new Label(banner, SWT.WRAP);
subjectLabel.setLayoutData(gridData);
subjectLabel.setForeground(Theme.getColor(Theme.Shell.TEXT_AND_LABEL_FOREGROUND));
l = new Label(banner, SWT.NONE);
l.setText("From:");
l.setFont(boldFont);
l.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false));
l.setForeground(Theme.getColor(Theme.Shell.TEXT_AND_LABEL_FOREGROUND));
senderLink = new Link(banner, SWT.NONE);
senderLink.addSelectionListener(senderLinkSelectionAdapter);
senderLink.setLayoutData(gridData);
senderLink.addPaintListener(senderLinkPaintListener);
l = new Label(banner, SWT.NONE);
l.setText("Date:");
l.setFont(boldFont);
l.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false));
l.setForeground(Theme.getColor(Theme.Shell.TEXT_AND_LABEL_FOREGROUND));
dateLabel = new Label(banner, SWT.WRAP);
dateLabel.setLayoutData(gridData);
dateLabel.setForeground(Theme.getColor(Theme.Shell.TEXT_AND_LABEL_FOREGROUND));
// message contents
messageText = new Text(messageBodyComposite, SWT.BORDER | SWT.MULTI | SWT.WRAP);
messageText.setLayoutData(new GridData(GridData.FILL_BOTH));
messageText.setEditable(false);
messageText.setBackground(messageText.getDisplay().getSystemColor(SWT.COLOR_WHITE));
messageText.setForeground(Theme.getColor(Theme.Shell.TEXT_AND_LABEL_FOREGROUND));
messageText.setBackground(viewer.getTable().getBackground());
}
@Override
public void setFocus() {
}
private static class ColumnLabelProviderExt extends ColumnLabelProvider {
private int columnIndex;
public ColumnLabelProviderExt(int columnIndex) {
this.columnIndex = columnIndex;
}
@Override
public Image getImage(Object element) {
if (columnIndex == 0 && ((Mail) element).getImportance() == Importance.High) {
return PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_DEC_FIELD_WARNING);
}
return null;
}
@Override
public Font getFont(Object element) {
Mail mail = (Mail) element;
if (mail.getImportance() == Importance.High) {
return Theme.getFont(Theme.FolderPreviewView.HIGH_IMP_MAIL_FONT);
}
if (mail.getImportance() == Importance.Normal) {
return Theme.getFont(Theme.FolderPreviewView.NORMAL_IMP_MAIL_FONT);
}
return Theme.getFont(Theme.FolderPreviewView.LOW_IMP_MAIL_FONT);
}
@Override
public Color getForeground(Object element) {
Mail mail = (Mail) element;
if (mail.getImportance() == Importance.High) {
return Theme.getColor(Theme.FolderPreviewView.HIGH_IMP_MAIL_FOREGROUND);
}
if (mail.getImportance() == Importance.Normal) {
return Theme.getColor(Theme.FolderPreviewView.NORMAL_IMP_MAIL_FOREGROUND);
}
return Theme.getColor(Theme.FolderPreviewView.LOW_IMP_MAIL_FOREGROUND);
}
@Override
public String getText(Object element) {
Mail mail = (Mail) element;
switch (columnIndex) {
case 1:
return mail.getSender();
case 2:
return mail.getSubject();
case 3:
return DateUtils.toString(mail.getDate());
default:
return "";
}
}
}
}