#include "config.h"
#include "TrackBase.h"
#include "Language.h"
#include <wtf/text/StringBuilder.h>
#if ENABLE(VIDEO_TRACK)
#include "HTMLMediaElement.h"
namespace WebCore {
static int s_uniqueId = 0;
TrackBase::TrackBase(Type type, const AtomicString& id, const AtomicString& label, const AtomicString& language)
: m_uniqueId(++s_uniqueId)
, m_id(id)
, m_label(label)
, m_language(language)
, m_validBCP47Language(language)
{
ASSERT(type != BaseTrack);
m_type = type;
}
TrackBase::~TrackBase()
{
}
Element* TrackBase::element()
{
return m_mediaElement;
}
static bool isValidBCP47LanguageTag(const String& languageTag)
{
auto const length = languageTag.length();
if (length < 2 || length > 100)
return false;
UChar firstChar = languageTag[0];
if (!isASCIIAlpha(firstChar))
return false;
UChar secondChar = languageTag[1];
if (length == 2)
return isASCIIAlpha(secondChar);
bool grandFatheredIrregularOrPrivateUse = (firstChar == 'i' || firstChar == 'x') && secondChar == '-';
unsigned nextCharIndexToCheck;
if (!grandFatheredIrregularOrPrivateUse) {
if (!isASCIIAlpha(secondChar))
return false;
if (length == 3)
return isASCIIAlpha(languageTag[2]);
if (isASCIIAlpha(languageTag[2])) {
if (languageTag[3] == '-')
nextCharIndexToCheck = 4;
else
return false;
} else if (languageTag[2] == '-')
nextCharIndexToCheck = 3;
else
return false;
} else
nextCharIndexToCheck = 2;
for (; nextCharIndexToCheck < length; ++nextCharIndexToCheck) {
UChar c = languageTag[nextCharIndexToCheck];
if (isASCIIAlphanumeric(c) || c == '-')
continue;
return false;
}
return true;
}
void TrackBase::setLanguage(const AtomicString& language)
{
if (!language.isEmpty() && !isValidBCP47LanguageTag(language)) {
String message;
if (language.contains((UChar)'\0'))
message = WTF::ASCIILiteral("The language contains a null character and is not a valid BCP 47 language tag.");
else {
StringBuilder stringBuilder;
stringBuilder.appendLiteral("The language '");
stringBuilder.append(language);
stringBuilder.appendLiteral("' is not a valid BCP 47 language tag.");
message = stringBuilder.toString();
}
if (auto element = this->element())
element->document().addConsoleMessage(MessageSource::Rendering, MessageLevel::Warning, message);
} else
m_validBCP47Language = language;
m_language = language;
}
AtomicString TrackBase::validBCP47Language() const
{
return m_validBCP47Language;
}
MediaTrackBase::MediaTrackBase(Type type, const AtomicString& id, const AtomicString& label, const AtomicString& language)
: TrackBase(type, id, label, language)
{
}
void MediaTrackBase::setKind(const AtomicString& kind)
{
setKindInternal(kind);
}
void MediaTrackBase::setKindInternal(const AtomicString& kind)
{
if (isValidKind(kind))
m_kind = kind;
else
m_kind = emptyAtom();
}
}
#endif