private static void CreateElement(InlineCollection parent, Node node, RichTextBlockStatus status)
{
switch (node)
{
case Element element:
switch (element.TagName.ToLower())
{
case "a":
{
// We want to change BaseUri easily, so we use `GetAttribute("href")` instead of `HtmlAnchorElement.Href`
var href = element.GetAttribute("href");
if (!status.TryCreateUri(href, out var uri))
break;
parent.Add(new Run() { Text = " " });
var hyperlink = new Hyperlink()
{
NavigateUri = uri,
Foreground = status.Foreground
};
foreach (var child in element.ChildNodes)
{
switch (child)
{
case HtmlImageElement childElement:
if (CreateImage(element, status) is Image image)
{
if (hyperlink.Inlines.Count != 0)
{
hyperlink.SetUri(href);
status.Hyperlinks.Add(hyperlink);
parent.Add(hyperlink);
}
var button = new HyperlinkButton()
{
NavigateUri = uri,
Content = image,
RequestedTheme = status.RequestedTheme
};
button.SetUri(href);
status.HyperlinkButtons.Add(button);
parent.Add(new InlineUIContainer() { Child = button });
hyperlink = new Hyperlink()
{
NavigateUri = uri,
Foreground = status.Foreground
};
}
break;
default:
CreateElement(hyperlink.Inlines, child, status);
break;
}
break;
}
if (hyperlink.Inlines.Count != 0)
{
hyperlink.SetUri(href);
status.Hyperlinks.Add(hyperlink);
parent.Add(hyperlink);
}
parent.Add(new Run() { Text = " " });
}
break;
case "img":
{
if (CreateImage(element, status) is Image image)
parent.Add(new InlineUIContainer() { Child = image });
}
break;
case "strong":
case "b":
{
var span = new Span() { FontWeight = FontWeights.Bold };
CreateChildren(span.Inlines, element, status);
parent.Add(span);
}
break;
case "div":
case "font":
case "p":
case "span":
{
var span = new Span();
foreach (var s in ParseStyle(element.GetAttribute("style")))
switch (s.Key)
{
case "font-size":
{
var value = s.Value;
double fontSize;
if (value.EndsWith("px"))
fontSize = double.Parse(value.Remove(value.Length - 2));
else if (value.EndsWith("%"))
fontSize = 14 * double.Parse(value.Remove(value.Length - 1)) / 100;
else
fontSize = 14 * double.Parse(value);
span.FontSize = fontSize;
}
break;
case "font-weight":
switch (s.Value)
{
case "bold":
span.FontWeight = FontWeights.Bold;
break;
}
break;
}
CreateChildren(span.Inlines, element, status);
parent.Add(span);
}
break;
case "br":
if (element.NextSibling is Text nextText &&
nextText.Data.StartsWith("\n"))
break;
parent.Add(new LineBreak());
break;
case "hr":
parent.Add(new LineBreak());
var line = new Border()
{
BorderThickness = new Thickness(0, 1, 0, 0),
BorderBrush = status.Foreground,
Margin = new Thickness(8, 0, 8, 0),
Height = 1,
};
if (status.ActualWidth > 16)
line.Width = status.ActualWidth - 16;
status.Lines.Add(line);
parent.Add(new InlineUIContainer() { Child = line });
parent.Add(new LineBreak());
break;
case "iframe": // Ignore
case "script":
case "noscript":
break;
#if DEBUG
default:
Debug.WriteLine($"Ignore unknown tag {element.TagName}");
break;
#endif
}
break;
case Text text:
parent.Add(new Run() { Text = text.Data });
break;
}
}
