@Override
public Subtitle parse(InputStream inputStream) throws IOException {
try {
XmlPullParser xmlParser = xmlParserFactory.newPullParser();
Map<String, TtmlStyle> globalStyles = new HashMap<>();
xmlParser.setInput(inputStream, null);
TtmlSubtitle ttmlSubtitle = null;
LinkedList<TtmlNode> nodeStack = new LinkedList<>();
int unsupportedNodeDepth = 0;
int eventType = xmlParser.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
TtmlNode parent = nodeStack.peekLast();
if (unsupportedNodeDepth == 0) {
String name = xmlParser.getName();
if (eventType == XmlPullParser.START_TAG) {
if (!isSupportedTag(name)) {
Log.i(TAG, "Ignoring unsupported tag: " + xmlParser.getName());
unsupportedNodeDepth++;
} else if (TtmlNode.TAG_HEAD.equals(name)) {
parseHeader(xmlParser, globalStyles);
} else {
try {
TtmlNode node = parseNode(xmlParser, parent);
nodeStack.addLast(node);
if (parent != null) {
parent.addChild(node);
}
} catch (ParserException e) {
if (strictParsing) {
throw e;
} else {
Log.w(TAG, "Suppressing parser error", e);
// Treat the node (and by extension, all of its children) as unsupported.
unsupportedNodeDepth++;
}
}
}
} else if (eventType == XmlPullParser.TEXT) {
parent.addChild(TtmlNode.buildTextNode(xmlParser.getText()));
} else if (eventType == XmlPullParser.END_TAG) {
if (xmlParser.getName().equals(TtmlNode.TAG_TT)) {
ttmlSubtitle = new TtmlSubtitle(nodeStack.getLast(), globalStyles);
}
nodeStack.removeLast();
}
} else {
if (eventType == XmlPullParser.START_TAG) {
unsupportedNodeDepth++;
} else if (eventType == XmlPullParser.END_TAG) {
unsupportedNodeDepth--;
}
}
xmlParser.next();
eventType = xmlParser.getEventType();
}
return ttmlSubtitle;
} catch (XmlPullParserException xppe) {
throw new ParserException("Unable to parse source", xppe);
}
}
