//=====================================================================
/// <summary>
/// Constructor
/// </summary>
public TopicPreviewerControl()
{
if (MamlToFlowDocumentConverter.CodeColorizer == null)
{
try
{
string colorizerPath = Path.Combine(ComponentUtilities.ToolsFolder,
@"PresentationStyles\Colorizer");
MamlToFlowDocumentConverter.CodeColorizer = new CodeColorizer(Path.Combine(colorizerPath,
"highlight.xml"), Path.Combine(colorizerPath, "highlight_flowDoc.xsl"))
{
OutputFormat = OutputFormat.FlowDocument
};
MamlToFlowDocumentConverter.ColorizerFlowDocumentTemplate = Path.Combine(colorizerPath,
"DocumentTemplate.xaml");
}
catch (Exception ex)
{
MessageBox.Show("Unable to create code block colorizer. Reason: " + ex.Message,
Constants.AppName, MessageBoxButton.OK, MessageBoxImage.Exclamation);
}
}
converter = new MamlToFlowDocumentConverter();
browserHistory = new List <Uri>();
historyLocation = -1;
// Merge the shared resources
this.Resources.MergedDictionaries.Add(SharedResources.SplitButtonStyleResources);
InitializeComponent();
}
/// <summary>
/// This is used to locate a topic by ID and display it
/// </summary>
/// <param name="link">The link to the topic</param>
/// <returns>True if found and displayed, false if not</returns>
private bool NavigateToTopic(Uri link)
{
bool wasFound = false;
// If there's a topic ID, try to find it
if (!String.IsNullOrEmpty(link.Host))
{
var topics = tableOfContents.Find(
t => t.Id.Equals(link.Host, StringComparison.OrdinalIgnoreCase), true);
if (topics.Any())
{
var topic = topics.First();
// If already selected, force it to reload to reflect changes made to the topic
if (topic.IsSelected)
{
tvContent_SelectedItemChanged(this, new RoutedPropertyChangedEventArgs <object>(null, null));
}
else
{
topic.IsSelected = true;
}
wasFound = true;
}
}
// If there's a fragment, try to find the named element and bring it into view
if (!String.IsNullOrEmpty(link.Fragment) && link.Fragment.Length > 1)
{
var element = fdViewer.Document.FindByName(MamlToFlowDocumentConverter.ToElementName(
link.Fragment.Substring(1))).FirstOrDefault();
if (element != null)
{
element.BringIntoView();
wasFound = true;
}
else
{
wasFound = false;
}
}
return(wasFound);
}
/// <summary>
/// This is used to locate a topic by ID and display it
/// </summary>
/// <param name="link">The link to the topic</param>
/// <returns>True if found and displayed, false if not</returns>
private bool NavigateToTopic(Uri link)
{
bool wasFound = false;
// If there's a topic ID, try to find it
if (!String.IsNullOrEmpty(link.Host))
{
var topics = tableOfContents.Find(
t => t.Id.Equals(link.Host, StringComparison.OrdinalIgnoreCase), true);
if (topics.Any())
{
var topic = topics.First();
// If already selected, force it to reload to reflect changes made to the topic
if (topic.IsSelected)
{
tvContent_SelectedItemChanged(this, new RoutedPropertyChangedEventArgs <object>(null, null));
}
else
{
topic.IsSelected = true;
// We need to force the SelectedItemChanged event to run so that the document instance is
// updated before we get to the fragment check below. Haven't found a better way to do
// this but it works.
if (Application.Current != null && Application.Current.Dispatcher != null)
{
Application.Current.Dispatcher.Invoke(DispatcherPriority.Background,
new ThreadStart(delegate { }));
}
}
wasFound = true;
}
}
// If there's a fragment, try to find the named element and bring it into view
if (!String.IsNullOrEmpty(link.Fragment) && link.Fragment.Length > 1)
{
var element = fdViewer.Document.FindByName(MamlToFlowDocumentConverter.ToElementName(
link.Fragment.Substring(1))).FirstOrDefault();
if (element != null)
{
// Scroll the element into view. BringIntoView() doesn't work on the flow document element
// so we need to find the scroll viewer that contains it and scroll that instead.
DependencyObject child = fdViewer;
if (VisualTreeHelper.GetChildrenCount(child) != 0)
{
while (!(child is ScrollViewer))
{
child = VisualTreeHelper.GetChild(child as Visual, 0);
}
((ScrollViewer)child).ScrollToVerticalOffset(element.ContentStart.GetCharacterRect(
LogicalDirection.Forward).Top);
}
wasFound = true;
}
else
{
wasFound = false;
}
}
return(wasFound);
}
