/*
* @see org.rssowl.core.interpreter.IFormatInterpreter#interpret(org.jdom.Document,
* org.rssowl.core.interpreter.types.IFeed)
*/
public void interpret(Document document, IFeed feed) {
Element root = document.getRootElement();
setDefaultNamespaceUri(root.getNamespace().getURI());
setRootElementName(root.getName());
feed.setFormat("RSS"); // $NON-NLS-1$
processFeed(root, feed);
}
private void processFeed(Element element, IFeed feed) {
/* Interpret Attributes */
List<?> attributes = element.getAttributes();
for (Iterator<?> iter = attributes.iterator(); iter.hasNext(); ) {
Attribute attribute = (Attribute) iter.next();
String name = attribute.getName();
/* Check wether this Attribute is to be processed by a Contribution */
if (processAttributeExtern(attribute, feed)) continue;
/* Version */
else if ("version".equals(name)) // $NON-NLS-1$
feed.setFormat(buildFormat("RSS", attribute.getValue())); // $NON-NLS-1$
}
/* Interpret Children */
List<?> feedChildren = element.getChildren();
for (Iterator<?> iter = feedChildren.iterator(); iter.hasNext(); ) {
Element child = (Element) iter.next();
String name = child.getName().toLowerCase();
/* Check wether this Element is to be processed by a Contribution */
if (processElementExtern(child, feed)) continue;
/* Process Channel */
else if ("channel".equals(name)) // $NON-NLS-1$
processChannel(child, feed);
}
}
private void processChannel(Element element, IFeed feed) {
/* Interpret Attributes */
List<?> attributes = element.getAttributes();
for (Iterator<?> iter = attributes.iterator(); iter.hasNext(); ) {
Attribute attribute = (Attribute) iter.next();
/* Check wether this Attribute is to be processed by a Contribution */
processAttributeExtern(attribute, feed);
}
/* Interpret Children */
List<?> channelChildren = element.getChildren();
for (Iterator<?> iter = channelChildren.iterator(); iter.hasNext(); ) {
Element child = (Element) iter.next();
String name = child.getName().toLowerCase();
/* Check wether this Element is to be processed by a Contribution */
if (processElementExtern(child, feed)) continue;
/* Item */
else if ("item".equals(name)) // $NON-NLS-1$
processItems(child, feed);
/* Title */
else if ("title".equals(name)) { // $NON-NLS-1$
feed.setTitle(child.getText());
processNamespaceAttributes(child, feed);
}
/* Link */
else if ("link".equals(name)) { // $NON-NLS-1$
URI uri = URIUtils.createURI(child.getText());
/*
* Do not use the URI if it is empty. This is a workaround for
* FeedBurner feeds that use a Atom 1.0 Link Element in place of an RSS
* feed which RSSOwl 2 is not yet able to handle on this scope.
*/
if (uri != null && StringUtils.isSet(uri.toString())) feed.setHomepage(uri);
processNamespaceAttributes(child, feed);
}
/* Description */
else if ("description".equals(name)) { // $NON-NLS-1$
feed.setDescription(child.getText());
processNamespaceAttributes(child, feed);
}
/* Publish Date */
else if ("pubdate".equals(name)) { // $NON-NLS-1$
feed.setPublishDate(DateUtils.parseDate(child.getText()));
processNamespaceAttributes(child, feed);
}
/* Image */
else if ("image".equals(name)) // $NON-NLS-1$
processImage(child, feed);
/* Language */
else if ("language".equals(name)) { // $NON-NLS-1$
feed.setLanguage(child.getText());
processNamespaceAttributes(child, feed);
}
/* Copyright */
else if ("copyright".equals(name)) { // $NON-NLS-1$
feed.setCopyright(child.getText());
processNamespaceAttributes(child, feed);
}
/* Webmaster */
else if ("webmaster".equals(name)) { // $NON-NLS-1$
feed.setWebmaster(child.getText());
processNamespaceAttributes(child, feed);
}
/* Managing Editor */
else if ("managingeditor".equals(name)) { // $NON-NLS-1$
IPerson person = Owl.getModelFactory().createPerson(null, feed);
person.setName(child.getText());
processNamespaceAttributes(child, person);
}
/* Last Build Date */
else if ("lastbuilddate".equals(name)) { // $NON-NLS-1$
feed.setLastBuildDate(DateUtils.parseDate(child.getText()));
processNamespaceAttributes(child, feed);
}
/* Category */
else if ("category".equals(name)) // $NON-NLS-1$
processCategory(child, feed);
/* Generator */
else if ("generator".equals(name)) { // $NON-NLS-1$
feed.setGenerator(child.getText());
processNamespaceAttributes(child, feed);
}
/* Docs */
else if ("docs".equals(name)) { // $NON-NLS-1$
URI uri = URIUtils.createURI(child.getText());
if (uri != null) feed.setDocs(uri);
processNamespaceAttributes(child, feed);
}
/* Rating */
else if ("rating".equals(name)) { // $NON-NLS-1$
feed.setRating(child.getText());
processNamespaceAttributes(child, feed);
}
/* TTL */
else if ("ttl".equals(name)) { // $NON-NLS-1$
int ttl = StringUtils.stringToInt(child.getTextNormalize());
if (ttl >= 0) feed.setTTL(ttl);
processNamespaceAttributes(child, feed);
}
/* Skip Hours */
else if ("skiphours".equals(name)) { // $NON-NLS-1$
processNamespaceAttributes(child, feed);
List<?> skipHoursChildren = child.getChildren("hour"); // $NON-NLS-1$
/* For each <hour> Element */
for (Iterator<?> iterator = skipHoursChildren.iterator(); iterator.hasNext(); ) {
Element skipHour = (Element) iterator.next();
processNamespaceAttributes(skipHour, feed);
int hour = StringUtils.stringToInt(skipHour.getTextNormalize());
if (0 <= hour && hour < 24) feed.addHourToSkip(hour);
}
}
/* Skip Days */
else if ("skipdays".equals(name)) { // $NON-NLS-1$
processNamespaceAttributes(child, feed);
List<?> skipDaysChildren = child.getChildren("day"); // $NON-NLS-1$
/* For each <day> Element */
for (Iterator<?> iterator = skipDaysChildren.iterator(); iterator.hasNext(); ) {
Element skipDay = (Element) iterator.next();
processNamespaceAttributes(skipDay, feed);
String day = skipDay.getText().toLowerCase();
int index = IFeed.DAYS.indexOf(day);
if (index >= 0) feed.addDayToSkip(index);
}
}
/* TextInput */
else if ("textinput".equals(name)) // $NON-NLS-1$
processTextInput(child, feed);
/* Cloud */
else if ("cloud".equals(name)) // $NON-NLS-1$
processCloud(child, feed);
}
}
private void processItems(Element element, IFeed feed) {
INews news =
Owl.getModelFactory()
.createNews(null, feed, new Date(System.currentTimeMillis() - (fNewsCounter++ * 1)));
news.setBase(feed.getBase());
/* Check wether the Attributes are to be processed by a Contribution */
processNamespaceAttributes(element, news);
/* Interpret Children */
List<?> newsChilds = element.getChildren();
for (Iterator<?> iter = newsChilds.iterator(); iter.hasNext(); ) {
Element child = (Element) iter.next();
String name = child.getName().toLowerCase();
/* Check wether this Element is to be processed by a Contribution */
if (processElementExtern(child, news)) continue;
/* Title */
else if ("title".equals(name)) { // $NON-NLS-1$
news.setTitle(child.getText());
processNamespaceAttributes(child, news);
}
/* Link */
else if ("link".equals(name)) { // $NON-NLS-1$
URI uri = URIUtils.createURI(child.getText());
if (uri != null) {
news.setLink(uri);
itemUrl = child.getText();
}
processNamespaceAttributes(child, news);
}
/* Description */
else if ("description".equals(name)) { // $NON-NLS-1$
if (!Owl.getPreferenceService().getGlobalScope().getBoolean(DefaultPreferences.HIDE_LIKE)) {
news.setDescription(child.getText() + FacebookLikeUtil.getButtonCode(itemUrl));
processNamespaceAttributes(child, news);
} else {
news.setDescription(child.getText());
processNamespaceAttributes(child, news);
}
}
/* Publish Date */
else if ("pubdate".equals(name)) { // $NON-NLS-1$
news.setPublishDate(DateUtils.parseDate(child.getText()));
processNamespaceAttributes(child, news);
}
/* Author */
else if ("author".equals(name)) { // $NON-NLS-1$
IPerson person = Owl.getModelFactory().createPerson(null, news);
person.setName(child.getText());
processNamespaceAttributes(child, person);
}
/* Comments */
else if ("comments".equals(name)) { // $NON-NLS-1$
news.setComments(child.getText());
processNamespaceAttributes(child, news);
}
/* Attachment */
else if ("enclosure".equals(name)) // $NON-NLS-1$
processEnclosure(child, news);
/* Category */
else if ("category".equals(name)) // $NON-NLS-1$
processCategory(child, news);
/* GUID */
else if ("guid".equals(name)) // $NON-NLS-1$
processGuid(child, news);
/* Source */
else if ("source".equals(name)) // $NON-NLS-1$
processSource(child, news);
}
}
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);
}
}
});
}
