/// <summary>
/// Checks if the navigation source is registered.
/// </summary>
/// <param name="navigationSource">The navigation source</param>
/// <returns>True if registered</returns>
public bool IsRegistered(NavigationSource navigationSource)
{
if (navigationSource == null)
{
throw new ArgumentNullException(nameof(navigationSource));
}
return(this.navigationSources.Contains(navigationSource));
}
/// <summary>
/// Creates the <see cref="NavigationSourceCommands"/>.
/// </summary>
/// <param name="navigationSource">The navigation source</param>
public NavigationSourceCommands(NavigationSource navigationSource)
{
if (navigationSource == null)
{
throw new ArgumentNullException(nameof(navigationSource));
}
this.navigationSource = navigationSource;
this.navigationSource.CanMoveToPreviousChanged += OnCanMoveToPreviousChanged;
this.navigationSource.CanMoveToNextChanged += OnCanMoveToNextChanged;
}
/// <summary>
/// Removes the <see cref="NavigationSource"/>.
/// </summary>
/// <param name="navigationSource">The navigation source</param>
public bool Unregister(NavigationSource navigationSource)
{
if (navigationSource == null)
{
throw new ArgumentNullException(nameof(navigationSource));
}
if (this.navigationSources.Contains(navigationSource))
{
return(this.navigationSources.Remove(navigationSource));
}
return(false);
}
/// <summary>
/// Adds the <see cref="NavigationSource"/>.
/// </summary>
/// <param name="navigationSource">The navigation source</param>
public void Register(NavigationSource navigationSource)
{
if (navigationSource == null)
{
throw new ArgumentNullException(nameof(navigationSource));
}
if (navigationSources.Count > 0)
{
navigationSource.Sync(navigationSources[0]);
}
this.navigationSources.Add(navigationSource);
}
/// <summary>
/// Removes the <see cref="NavigationSource"/> from the <see cref="NavigationSourceContainer"/>.
/// </summary>
/// <param name="sourceName">The source name</param>
/// <param name="navigationSource">The navigation source</param>
/// <returns>True if removed</returns>
public static bool RemoveNavigationSource(string sourceName, NavigationSource navigationSource)
{
if (sourceName == null)
{
throw new ArgumentNullException(nameof(sourceName));
}
if (navigationSource == null)
{
throw new ArgumentNullException(nameof(navigationSource));
}
if (allNavigationSources.TryGetValue(sourceName, out NavigationSourceContainer navigationSourceContainer))
{
if (navigationSourceContainer.IsRegistered(navigationSource))
{
return(navigationSourceContainer.Unregister(navigationSource));
}
}
return(false);
}
/// <summary>
/// Adds the <see cref="NavigationSource"/>. The <see cref="NavigationSourceContainer"/> is created if the <see cref="AllNavigationSources"/> does not contain the source name.
/// </summary>
/// <param name="sourceName">The source name</param>
/// <param name="navigationSource">The navigation source</param>
public static void AddNavigationSource(string sourceName, NavigationSource navigationSource)
{
if (sourceName == null)
{
throw new ArgumentNullException(nameof(sourceName));
}
if (navigationSource == null)
{
throw new ArgumentNullException(nameof(navigationSource));
}
if (allNavigationSources.TryGetValue(sourceName, out NavigationSourceContainer navigationSourceContainer))
{
navigationSourceContainer.Register(navigationSource);
}
else
{
navigationSourceContainer = new NavigationSourceContainer();
navigationSourceContainer.Register(navigationSource);
allNavigationSources[sourceName] = navigationSourceContainer;
}
}
/// <summary>
/// Synchronizes the navigation source with the navigation source provided.
/// </summary>
public void Sync(NavigationSource navigationSource)
{
this.ClearSources();
var entries = navigationSource.Entries;
var sources = navigationSource.Sources;
var currentIndex = navigationSource.CurrentIndex;
object currentSource = null;
object currentParameter = null;
int index = 0;
foreach (var entry in entries)
{
var originalSource = sources.ElementAt(index);
var source = NavigationHelper.EnsureNewView(originalSource);
this.InsertSourceInternal(index, entry.SourceType, source, entry.Parameter);
if (index == currentIndex)
{
currentSource = source;
currentParameter = entry.Parameter;
}
index++;
}
if (currentIndex != -1)
{
this.UpdateEntryParameter(currentIndex, currentParameter);
this.SetCurrentIndex(currentIndex);
this.SetCurrent(currentSource);
CheckCanMoveTo(false, false);
}
}
