/// <summary>
/// Writes embeded object tag.
/// </summary>
/// <param name="embeddedObject">
/// </param>
/// <param name="xmlWriter">
/// XmlWriter to output element opening tag.
/// </param>
/// <param name="wpfPayload">
/// </param>
private static void WriteEmbeddedObject(object embeddedObject, XmlWriter xmlWriter, WpfPayload wpfPayload)
{
if (wpfPayload != null && embeddedObject is Image)
{
// Writing in WPF mode: need to create an image with a Source referring into a package
Image image = (Image)embeddedObject;
if (image.Source != null && !string.IsNullOrEmpty(image.Source.ToString()))
{
// Add the image to the Image collection in the package
// and define the reference to image into the package
string imageSource = wpfPayload.AddImage(image);
if (imageSource != null)
{
Type elementTypeStandardized = typeof(Image);
// Write opening tag for the element
xmlWriter.WriteStartElement(elementTypeStandardized.Name);
// Write all properties except for Source
DependencyProperty[] imageProperties = TextSchema.ImageProperties;
DependencyObject complexProperties = new DependencyObject();
for (int i = 0; i < imageProperties.Length; i++)
{
DependencyProperty property = imageProperties[i];
if (property != Image.SourceProperty)
{
object value = image.GetValue(property);
// Write the property as attribute string or add it to a list of complex properties.
WriteNoninheritableProperty(xmlWriter, property, value, elementTypeStandardized, /*onlyAffected:*/true, complexProperties, image.ReadLocalValue(property));
}
}
// Write Source property - as a local reference into the package container
// Write Source property as the complex property to specify the BitmapImage
// cache option as "OnLoad" instead of the default "OnDeman". Otherwise,
// we couldn't load the image by disposing WpfPayload package.
xmlWriter.WriteStartElement(typeof(Image).Name + "." + Image.SourceProperty.Name);
xmlWriter.WriteStartElement(typeof(System.Windows.Media.Imaging.BitmapImage).Name);
xmlWriter.WriteAttributeString(System.Windows.Media.Imaging.BitmapImage.UriSourceProperty.Name, imageSource);
xmlWriter.WriteAttributeString(System.Windows.Media.Imaging.BitmapImage.CacheOptionProperty.Name, "OnLoad");
xmlWriter.WriteEndElement();
xmlWriter.WriteEndElement();
// Write remaining complex properties
WriteComplexProperties(xmlWriter, complexProperties, elementTypeStandardized);
// Close the element
xmlWriter.WriteEndElement();
}
}
}
else
{
// In non-package mode we ignore all UIElements.
// Output a space replacing this embedded element.
// Note that in this mode (DataFormats.Xaml) InlineUIContainer was
// replaced by Run and BlockUIContainer - by Paragraph,
// so the space output here will be significant.
xmlWriter.WriteString(" ");
}
}