/// <summary>
/// Performs navigation to specified link.
/// </summary>
/// <param name="uri">The uri to navigate to.</param>
/// <param name="source">The source element that triggers the navigation. Required for frame navigation.</param>
/// <param name="parameter">An optional command parameter or navigation target.</param>
public virtual void Navigate(Uri uri, FrameworkElement source = null, string parameter = null)
{
if (uri == null)
{
throw new ArgumentNullException("uri");
}
// first check if uri refers to a command
ICommand command;
if (Commands != null && Commands.TryGetValue(uri, out command))
{
// note: not executed within BBCodeBlock context, Hyperlink instance has Command and CommandParameter set
if (command.CanExecute(parameter))
{
command.Execute(parameter);
}
}
else if (uri.IsAbsoluteUri && ExternalSchemes != null &&
ExternalSchemes.Any(s => uri.Scheme.Equals(s, StringComparison.OrdinalIgnoreCase)))
{
// uri is external, load in default browser
Process.Start(uri.AbsoluteUri);
}
else
{
// perform frame navigation
if (source == null)
{
// source required
throw new ArgumentException(string.Format(CultureInfo.CurrentUICulture,
Resources.NavigationFailedSourceNotSpecified, uri));
}
// use optional parameter as navigation target to identify target frame (_self, _parent, _top or named target frame)
ModernFrame frame = NavigationHelper.FindFrame(parameter, source);
if (frame == null)
{
throw new ArgumentException(string.Format(CultureInfo.CurrentUICulture,
Resources.NavigationFailedFrameNotFound, uri, parameter));
}
// delegate navigation to the frame
frame.Source = uri;
}
}
/// <summary>
/// Performs navigation to specified link.
/// </summary>
/// <param name="uri">The uri to navigate to.</param>
/// <param name="source">The source element that triggers the navigation. Required for frame navigation.</param>
/// <param name="parameter">An optional command parameter or navigation target.</param>
public virtual void Navigate(Uri uri, FrameworkElement source = null, string parameter = null)
{
if (uri == null)
{
throw new ArgumentNullException(nameof(uri));
}
var args = new NavigateEventArgs(uri);
PreviewNavigate?.Invoke(this, args);
if (args.Cancel)
{
return;
}
// first check if uri refers to a command
if (Commands != null)
{
ICommand command;
if (Commands.TryGetValue(uri, out command))
{
// note: not executed within BbCodeBlock context, Hyperlink instance has Command and CommandParameter set
if (command.CanExecute(parameter))
{
command.Execute(parameter);
}
return;
}
if (uri.IsAbsoluteUri)
{
var original = uri.AbsoluteUri;
var index = original.IndexOf('?');
if (index != -1)
{
var subUri = new Uri(original.Substring(0, index), UriKind.Absolute);
if (Commands.TryGetValue(subUri, out command))
{
parameter = uri.GetQueryParam("param");
if (command.CanExecute(parameter))
{
command.Execute(parameter);
}
return;
}
}
}
}
if (uri.IsAbsoluteUri && ExternalSchemes != null && ExternalSchemes.Any(s => uri.Scheme.Equals(s, StringComparison.OrdinalIgnoreCase)))
{
// uri is external, load in default browser
Process.Start(uri.AbsoluteUri);
}
else
{
// perform frame navigation
if (source == null) // source required
{
throw new ArgumentException(string.Format(CultureInfo.CurrentUICulture, UiStrings.NavigationFailedSourceNotSpecified, uri));
}
// use optional parameter as navigation target to identify target frame (_self, _parent, _top or named target frame)
var frame = NavigationHelper.FindFrame(parameter, source);
if (frame == null)
{
throw new ArgumentException(string.Format(CultureInfo.CurrentUICulture, UiStrings.NavigationFailedFrameNotFound, uri, parameter));
}
var window = Window.GetWindow(frame) as INavigateUriHandler;
if (window == null || frame.GetParent <ModernFrame>() != null || window.HandleUri(uri) != true)
{
// delegate navigation to the frame
frame.Source = uri;
}
}
}
