private void showMessage(String msg, boolean isError, boolean showProgress) {
if (fBrowser.getControl().isDisposed()) return;
StringBuilder html = new StringBuilder();
html.append(
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">\n"); //$NON-NLS-1$
html.append("<html>\n"); // $NON-NLS-1$
html.append("<body style=\"overflow: auto; font-family: ")
.append(fNewsFontFamily)
.append(",Verdanna,sans-serif; ")
.append(fNormalFontCSS)
.append("\">"); // $NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
if (showProgress)
html.append(
"<img src=\""
+ OwlUI.getImageUri("/icons/obj16/progress.gif", "progress.gif")
+ "\" />"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
if (isError) html.append("<span style=\"color: darkred;\">"); // $NON-NLS-1$
else if (showProgress)
html.append("<span style=\"padding-left:3px; vertical-align:top;\">"); // $NON-NLS-1$
html.append(msg);
if (isError || showProgress) html.append("</span>"); // $NON-NLS-1$
html.append("</body>\n"); // $NON-NLS-1$
html.append("</html>\n"); // $NON-NLS-1$
fBrowser.getControl().setText(html.toString());
}
/*
* @see org.eclipse.jface.dialogs.TitleAreaDialog#createDialogArea(org.eclipse.swt.widgets.Composite)
*/
@Override
protected Control createDialogArea(Composite parent) {
/* Composite to hold all components */
Composite composite = new Composite(parent, SWT.NONE);
composite.setLayout(LayoutUtils.createGridLayout(1, 0, 0));
composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
/* Browser to preview News */
fBrowser = new CBrowser(composite, SWT.NONE);
fBrowser.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
fBrowser.setScriptDisabled(true);
fBrowser
.getControl()
.addKeyListener(
new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.character == SWT.ESC) close();
}
});
/* Label Provider to produce HTML per News */
fLabelProvider = new NewsBrowserLabelProvider(fBrowser);
/* Load and Display the Feed */
loadFeed();
/* Separator */
new Label(parent, SWT.SEPARATOR | SWT.HORIZONTAL)
.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false));
applyDialogFont(composite);
return composite;
}
private void showFeed(final IFeed feed) {
if (feed != null && !fBrowser.getControl().isDisposed()) {
List<INews> news = feed.getNewsByStates(INews.State.getVisible());
int newsCount = news.size();
if (news.size() > MAX_NEWS_SHOWN) news = news.subList(0, MAX_NEWS_SHOWN);
/* Start HTML */
StringBuilder html = new StringBuilder();
html.append(
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">\n"); //$NON-NLS-1$
/* Windows only: Mark of the Web */
if (Application.IS_WINDOWS) {
html.append(IE_MOTW);
html.append("\n"); // $NON-NLS-1$
}
/* Head */
html.append("<html>\n <head>\n"); // $NON-NLS-1$
/* Append Base URI if available */
URI base = (feed.getBase() != null) ? feed.getBase() : feed.getLink();
if (base != null) {
html.append(" <base href=\""); // $NON-NLS-1$
html.append(base);
html.append("\">"); // $NON-NLS-1$
}
/* Meta */
html.append(
"\n <meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\n"); //$NON-NLS-1$
/* CSS */
try {
StringWriter writer = new StringWriter();
fLabelProvider.writeCSS(writer, false);
html.append(writer.toString());
} catch (IOException e) {
/* Will Never Happen */
}
/* Open Body */
html.append(" </head>\n <body id=\"owlbody\">\n"); // $NON-NLS-1$
/* Title */
if (StringUtils.isSet(fBookmark.getName()))
html.append("<div class=\"group\">")
.append(fBookmark.getName())
.append("</div>"); // $NON-NLS-1$ //$NON-NLS-2$
/* Write News */
for (INews item : news) {
html.append(fLabelProvider.getText(item, false));
}
/* End HTML */
html.append("\n </body>\n</html>"); // $NON-NLS-1$
/* Apply to Browser */
fBrowser.getControl().setText(html.toString());
/* Also Update Status */
if (StringUtils.isSet(fBookmark.getName())) {
StringBuilder str = new StringBuilder();
if (feed.getHomepage() != null) {
str.append(
NLS.bind(
Messages.PreviewFeedDialog_FOUND_N_NEWS_HOMEPAGE,
newsCount,
fBookmark.getName()));
fStatusLabel.addSelectionListener(
new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
new OpenInBrowserAction(new StructuredSelection(feed.getHomepage())).run();
}
});
} else
str.append(
NLS.bind(Messages.PreviewFeedDialog_FOUND_N_NEWS, newsCount, fBookmark.getName()));
fStatusLabel.setText(str.toString());
}
}
}
private void loadFeed() {
/* Show Info that Feed is loading */
if (fLoadedFeed == null || fLoadedFeed.getVisibleNews().isEmpty()) {
if (StringUtils.isSet(fBookmark.getName()))
showMessage(
NLS.bind(Messages.PreviewFeedDialog_LOAD_FEED_N, fBookmark.getName()), false, true);
else showMessage(Messages.PreviewFeedDialog_LOAD_FEED, false, true);
}
/* Load Feed in Background */
JobRunner.runUIUpdater(
new UIBackgroundJob(fBrowser.getControl()) {
private IFeed feed;
private Exception error;
@Override
protected void runInBackground(IProgressMonitor monitor) {
/* First Check if a Feed was already provided */
if (fLoadedFeed != null && !fLoadedFeed.getVisibleNews().isEmpty()) {
feed = fLoadedFeed;
return;
}
/* Otherwise Load Feed */
try {
/* Resolve Feed if existing */
if (fFeedReference != null) feed = fFeedReference.resolve();
/* Create Temporary Feed */
if (feed == null || feed.getVisibleNews().isEmpty()) {
feed =
Owl.getModelFactory()
.createFeed(null, fBookmark.getFeedLinkReference().getLink());
/* Return if dialog closed */
if (monitor.isCanceled()
|| getShell().isDisposed()
|| fBrowser.getControl().isDisposed()) return;
/* Retrieve Stream */
IProtocolHandler handler = Owl.getConnectionService().getHandler(feed.getLink());
InputStream inS = handler.openStream(feed.getLink(), monitor, null);
/* Return if dialog closed */
if (monitor.isCanceled()
|| getShell().isDisposed()
|| fBrowser.getControl().isDisposed()) return;
/* Interpret Feed */
Owl.getInterpreter().interpret(inS, feed, null);
}
} catch (ConnectionException e) {
error = e;
Activator.safeLogError(e.getMessage(), e);
} catch (ParserException e) {
error = e;
Activator.safeLogError(e.getMessage(), e);
} catch (InterpreterException e) {
error = e;
Activator.safeLogError(e.getMessage(), e);
}
}
@Override
protected void runInUI(IProgressMonitor monitor) {
if (feed != null && error == null) showFeed(feed);
else if (error != null) {
String errorMessage = CoreUtils.toMessage(error);
if (StringUtils.isSet(errorMessage))
showMessage(
NLS.bind(Messages.PreviewFeedDialog_UNABLE_LOAD_FEED, errorMessage),
true,
false);
}
}
});
}
