private static HtmlAttributes GetHtmlAttributes(LinkInline linkInline)
{
var htmlAttributes = new HtmlAttributes();
var fromAttributes = linkInline.TryGetAttributes();
if (fromAttributes != null)
{
fromAttributes.CopyTo(htmlAttributes, false, false);
}
return(htmlAttributes);
}
private bool TryLinkInlineRenderer(HtmlRenderer renderer, LinkInline linkInline)
{
if (linkInline.IsImage && linkInline.Url != null)
{
Uri uri;
// Only process absolute Uri
if (Uri.TryCreate(linkInline.Url, UriKind.RelativeOrAbsolute, out uri) && uri.IsAbsoluteUri)
{
var htmlAttributes = new HtmlAttributes();
var fromAttributes = linkInline.TryGetAttributes();
if (fromAttributes != null)
{
fromAttributes.CopyTo(htmlAttributes, false, false);
}
// TODO: this code is not pluggable, so for now, we handle only the following web providers:
// - youtube
// - vimeo
var path = uri.GetComponents(UriComponents.Path, UriFormat.Unescaped);
string iFrameUrl = null;
if (uri.Host.StartsWith("www.youtube.com", StringComparison.OrdinalIgnoreCase))
{
var query = SplitQuery(uri);
if (query.Length > 0 && query[0].StartsWith("v="))
{
iFrameUrl = $"https://www.youtube.com/embed/{query[0].Substring(2)}";
}
}
else if (uri.Host.StartsWith("vimeo.com", StringComparison.OrdinalIgnoreCase))
{
var items = path.Split('/');
if (items.Length > 0)
{
iFrameUrl = $"https://player.vimeo.com/video/{items[items.Length - 1]}";
}
}
if (iFrameUrl != null)
{
renderer.Write($"<iframe src=\"{iFrameUrl}\"");
htmlAttributes.AddPropertyIfNotExist("width", Options.Width);
htmlAttributes.AddPropertyIfNotExist("height", Options.Height);
htmlAttributes.AddPropertyIfNotExist("frameborder", "0");
htmlAttributes.AddPropertyIfNotExist("allowfullscreen", null);
renderer.WriteAttributes(htmlAttributes);
renderer.Write("></iframe>");
return(true);
}
else
{
// Otherwise try to detect if we have an audio/video from the file extension
string mimeType;
var lastDot = path.LastIndexOf('.');
if (lastDot >= 0 &&
Options.ExtensionToMimeType.TryGetValue(path.Substring(lastDot), out mimeType))
{
var isAudio = mimeType.StartsWith("audio");
var tagType = isAudio ? "audio" : "video";
renderer.Write($"<{tagType}");
htmlAttributes.AddPropertyIfNotExist("width", Options.Width);
if (!isAudio)
{
htmlAttributes.AddPropertyIfNotExist("height", Options.Height);
}
htmlAttributes.AddPropertyIfNotExist("controls", null);
renderer.WriteAttributes(htmlAttributes);
renderer.Write($"><source type=\"{mimeType}\" src=\"{linkInline.Url}\"></source></{tagType}>");
renderer.Write("</iframe>");
return(true);
}
}
}
}
return(false);
}