void WebVTTTreeBuilder::constructTreeFromToken(Document& document)
{
// http://dev.w3.org/html5/webvtt/#webvtt-cue-text-dom-construction-rules
switch (m_token.type()) {
case WebVTTTokenTypes::Character: {
RefPtr<Text> child = Text::create(document, m_token.characters());
m_currentNode->parserAppendChild(child);
break;
}
case WebVTTTokenTypes::StartTag: {
WebVTTNodeType nodeType = tokenToNodeType(m_token);
if (nodeType == WebVTTNodeTypeNone)
break;
WebVTTNodeType currentType = m_currentNode->isWebVTTElement() ? toWebVTTElement(m_currentNode.get())->webVTTNodeType() : WebVTTNodeTypeNone;
// <rt> is only allowed if the current node is <ruby>.
if (nodeType == WebVTTNodeTypeRubyText && currentType != WebVTTNodeTypeRuby)
break;
RefPtr<WebVTTElement> child = WebVTTElement::create(nodeType, document);
if (!m_token.classes().isEmpty())
child->setAttribute(classAttr, m_token.classes());
if (nodeType == WebVTTNodeTypeVoice)
child->setAttribute(WebVTTElement::voiceAttributeName(), m_token.annotation());
else if (nodeType == WebVTTNodeTypeLanguage) {
m_languageStack.append(m_token.annotation());
child->setAttribute(WebVTTElement::langAttributeName(), m_languageStack.last());
}
if (!m_languageStack.isEmpty())
child->setLanguage(m_languageStack.last());
m_currentNode->parserAppendChild(child);
m_currentNode = child;
break;
}
case WebVTTTokenTypes::EndTag: {
WebVTTNodeType nodeType = tokenToNodeType(m_token);
if (nodeType == WebVTTNodeTypeNone)
break;
// The only non-VTTElement would be the DocumentFragment root. (Text
// nodes and PIs will never appear as m_currentNode.)
if (!m_currentNode->isWebVTTElement())
break;
WebVTTNodeType currentType = toWebVTTElement(m_currentNode.get())->webVTTNodeType();
bool matchesCurrent = nodeType == currentType;
if (!matchesCurrent) {
// </ruby> auto-closes <rt>
if (currentType == WebVTTNodeTypeRubyText && nodeType == WebVTTNodeTypeRuby) {
if (m_currentNode->parentNode())
m_currentNode = m_currentNode->parentNode();
} else
break;
}
if (nodeType == WebVTTNodeTypeLanguage)
m_languageStack.removeLast();
if (m_currentNode->parentNode())
m_currentNode = m_currentNode->parentNode();
break;
}
case WebVTTTokenTypes::TimestampTag: {
String charactersString = m_token.characters();
double parsedTimeStamp;
if (WebVTTParser::collectTimeStamp(charactersString, parsedTimeStamp))
m_currentNode->parserAppendChild(ProcessingInstruction::create(document, "timestamp", charactersString));
break;
}
default:
break;
}
}
static WebVTTNodeType tokenToNodeType(WebVTTToken& token)
{
switch (token.name().size()) {
case 1:
if (token.name()[0] == 'c')
return WebVTTNodeTypeClass;
if (token.name()[0] == 'v')
return WebVTTNodeTypeVoice;
if (token.name()[0] == 'b')
return WebVTTNodeTypeBold;
if (token.name()[0] == 'i')
return WebVTTNodeTypeItalic;
if (token.name()[0] == 'u')
return WebVTTNodeTypeUnderline;
break;
case 2:
if (token.name()[0] == 'r' && token.name()[1] == 't')
return WebVTTNodeTypeRubyText;
break;
case 4:
if (token.name()[0] == 'r' && token.name()[1] == 'u' && token.name()[2] == 'b' && token.name()[3] == 'y')
return WebVTTNodeTypeRuby;
if (token.name()[0] == 'l' && token.name()[1] == 'a' && token.name()[2] == 'n' && token.name()[3] == 'g')
return WebVTTNodeTypeLanguage;
break;
}
return WebVTTNodeTypeNone;
}
static inline bool isLangToken(WebVTTToken& token)
{
return token.name().size() == 4 && token.name()[0] == 'l' && token.name()[1] == 'a' && token.name()[2] == 'n' && token.name()[3] == 'g';
}