private static Line ReadLine(XmlElement elem, List <Line> positions, List <Line> windowStyles, List <Section> pens)
{
int t = elem.GetIntAttribute("t") ?? 0;
int d = elem.GetIntAttribute("d") ?? 5000;
if (t == 1) // Reverse Android workaround (See WriteLine)
{
t--;
d++;
}
DateTime start = TimeBase.AddMilliseconds(t);
DateTime end = start.AddMilliseconds(d);
Line line = new Line(start, end);
Line position = GetItemAtIndex(positions, elem.GetIntAttribute("wp"));
if (position != null)
{
line.AnchorPoint = position.AnchorPoint;
line.Position = position.Position;
}
Line windowStyle = GetItemAtIndex(windowStyles, elem.GetIntAttribute("ws"));
if (windowStyle != null)
{
line.VerticalTextType = windowStyle.VerticalTextType;
}
Section linePen = GetItemAtIndex(pens, elem.GetIntAttribute("p"));
line.Sections.AddRange(ReadSections(elem, pens, linePen).Where(s => s.Text.Length > 0 || s.StartOffset > TimeSpan.Zero));
return(line);
}
public YttDocument(string filePath)
{
XmlDocument doc = new XmlDocument();
doc.Load(filePath);
foreach (XmlElement parElem in doc.SelectNodes("/timedtext/body/p"))
{
int.TryParse(parElem.GetAttribute("t"), out int startMs);
int.TryParse(parElem.GetAttribute("d"), out int durationMs);
DateTime start = TimeBase.AddMilliseconds(startMs + SubtitleDelayMs);
DateTime end = start.AddMilliseconds(durationMs);
Line line = new Line(start, end, parElem.InnerText);
Lines.Add(line);
}
}
/// <summary>
/// On PC, the first piece of italic text shows up with a noticeable delay: the background appears as usual,
/// but for a fraction of a second after that, the text is either shown as non-italic or not shown at all.
/// To work around this, we add an invisible italic subtitle at the start to make YouTube eagerly load
/// whatever it normally loads lazily.
/// </summary>
private void AddItalicPrefetch()
{
Line italicLine =
new Line(TimeBase.AddMilliseconds(SubtitleDelayMs), TimeBase.AddMilliseconds(SubtitleDelayMs + 100))
{
Position = new PointF(0, 0),
AnchorPoint = AnchorPoint.BottomRight
};
Section section =
new Section("\x200B")
{
ForeColor = Color.FromArgb(1, 0, 0, 0),
BackColor = Color.Empty,
Italic = true
};
italicLine.Sections.Add(section);
Lines.Add(italicLine);
}
/// <summary>
/// On PC, the first piece of italic text shows up with a noticeable delay: the background appears instantly,
/// but during a fraction of a second after that, the text is either shown as non-italic or not shown at all.
/// To work around this, we add an invisible italic subtitle at the start to make YouTube eagerly load
/// whatever it normally loads lazily.
/// </summary>
private void AddItalicPrefetch()
{
if (!Lines.SelectMany(l => l.Sections).Any(s => s.Italic))
{
return;
}
Line italicLine =
new Line(TimeBase.AddMilliseconds(SubtitleDelayMs + 5000), TimeBase.AddMilliseconds(SubtitleDelayMs + 5100))
{
Position = new PointF(0, 0),
AnchorPoint = AnchorPoint.BottomRight
};
Section section =
new Section("\x200B")
{
ForeColor = Color.FromArgb(1, 0, 0, 0),
BackColor = Color.Empty,
Italic = true
};
italicLine.Sections.Add(section);
Lines.Add(italicLine);
}
