/// <summary>
/// Creates a style sheet for the given response asynchronously.
/// </summary>
/// <param name="response">
/// The response with the stream representing the source of the
/// stylesheet.
/// </param>
/// <param name="options">
/// The options with the parameters for evaluating the style.
/// </param>
/// <param name="cancel">The cancellation token.</param>
/// <returns>The task resulting in the style sheet.</returns>
public async Task <IStyleSheet> ParseStylesheetAsync(IResponse response, StyleOptions options, CancellationToken cancel)
{
var context = options.Document.Context;
var parser = context.GetService <ICssParser>();
var url = response.Address?.Href;
var source = new TextSource(response.Content);
var sheet = new CssStyleSheet(context, source)
{
IsDisabled = options.IsDisabled,
Href = url
};
sheet.SetOwner(options.Element);
return(await parser.ParseStyleSheetAsync(sheet, cancel).ConfigureAwait(false));
}
/// <summary>
/// Loads a stylesheet resource via its URL.
/// </summary>
/// <param name="context">The context to use.</param>
/// <param name="address">The address of the resource.</param>
/// <param name="element">The hosting element.</param>
/// <param name="cancel">The cancellation token.</param>
/// <returns>The async task.</returns>
public static async Task <IStyleSheet> OpenStyleSheetAsync(this IBrowsingContext context, Url address, IElement element, CancellationToken cancel)
{
var loader = context.GetService <IResourceLoader>();
var service = context.GetCssStyling();
if (loader != null && service != null)
{
var request = element.CreateRequestFor(address);
var download = loader.FetchAsync(request);
using (var response = await download.Task.ConfigureAwait(false))
{
var options = new StyleOptions(element?.Owner ?? context.Active)
{
Element = element
};
return(await service.ParseStylesheetAsync(response, options, cancel).ConfigureAwait(false));
}
}
return(null);
}