/// <summary>
/// Creates formatted FlowDocument
/// </summary>
protected virtual void GetFlowDocumentFromNavigatorAsync(XPathNavigator navigator, Story story, FlowDocumentStyleProvider styleProvider, object userState)
{
PrintableStoryFlowDocument flowDocument = new PrintableStoryFlowDocument();
MsdnStoryToFlowDocumentConverter.ApplyStyle(flowDocument, GetFlowDocumentStyle(styleProvider));
// Headline does not require async fetches, so the base class method can be used
CreateHeadline(flowDocument, navigator, story, styleProvider);
CreateBodyAsync(flowDocument, navigator, story, styleProvider, userState);
}
/// <summary>
/// CreateBodyAsync calls CreateBody to produce the FlowDocument, then begins async download of image sources.
/// If download is pending, or if there are no image sources in the document, it raises completed event
/// </summary>
protected virtual void CreateBodyAsync(PrintableStoryFlowDocument flowDocument, XPathNavigator navigator, Story story, FlowDocumentStyleProvider styleProvider, object userState)
{
if (!IsImageDownloadPending)
{
CreateBody(flowDocument, navigator, story, styleProvider);
// Check if image source fetches are needed
if (_pendingImageRequestStates != null && _pendingImageRequestStates.Count > 0)
{
// Request image sources. Store the FlowDocument as our user state and exit. Completed event is raised when image fetches complete
_targetDocument = flowDocument;
_dispatcher.BeginInvoke(DispatcherPriority.Input, new DispatcherOperationCallback(GetImageSources), userState);
return;
}
}
// Fallback: either there are no image sources to fetch, or downloads are pending. Raise completed event
ConversionCompletedEventArgs args = new ConversionCompletedEventArgs(userState, flowDocument);
_dispatcher.BeginInvoke(DispatcherPriority.Input, new DispatcherOperationCallback(RaiseConversionCompleted), args);
}
