/// <summary>
/// Creates a new navigation data structure for a new media navigation step.
/// </summary>
/// <param name="parent">Parent navigation data, this navigation data is derived from.</param>
/// <param name="navigationContextName">Name, which is used for the corresponding workflow navigation context.</param>
/// <param name="currentWorkflowStateId">Id of the workflow state which corresponds to the new media navigation step.</param>
/// <param name="parentWorkflowStateId">Id of the workflow state to which the workflow navigation should be reverted when
/// another filter is choosen.</param>
/// <param name="baseViewSpecification">View specification for the media items of the new media navigation step.</param>
/// <param name="defaultScreen">Screen which should present the new navigation step by default.</param>
/// <param name="availableScreens">Available set of screen descriptions which can present the new media navigation step.</param>
/// <param name="currentSorting">Denotes the current sorting for the items to be shown. If this is set to <c>null</c>,
/// default sorting will be applied.</param>
public NavigationData(NavigationData parent, string navigationContextName, Guid parentWorkflowStateId, Guid currentWorkflowStateId,
ViewSpecification baseViewSpecification, AbstractScreenData defaultScreen, ICollection<AbstractScreenData> availableScreens,
Sorting.Sorting currentSorting) :
this(parent, navigationContextName, parentWorkflowStateId, currentWorkflowStateId, baseViewSpecification, defaultScreen, availableScreens,
currentSorting, false) { }
// If the suppressActions parameter is set to <c>true</c>, no actions will be built. Instead, they will be inherited from
// the parent navigation step. That is used for subview navigation where the navigation step doesn't produce own
// workflow actions.
protected NavigationData(NavigationData parent, string navigationContextName, Guid parentWorkflowStateId, Guid currentWorkflowStateId,
ViewSpecification baseViewSpecification, AbstractScreenData defaultScreen, ICollection<AbstractScreenData> availableScreens,
Sorting.Sorting currentSorting, bool suppressActions)
{
_parent = parent;
_navigationContextName = navigationContextName;
_currentWorkflowStateId = currentWorkflowStateId;
_baseWorkflowStateId = parentWorkflowStateId;
_baseViewSpecification = baseViewSpecification;
_currentScreenData = defaultScreen;
_availableScreens = availableScreens ?? new List<AbstractScreenData>();
_currentSorting = currentSorting;
if (suppressActions)
_dynamicWorkflowActions = null;
else
BuildWorkflowActions();
}
/// <summary>
/// Enters a new media navigation context by inheriting all currently available screens. This is used for
/// presenting the contents of a media items or filter group, where the current menu should remain available.
/// Only the currently visible screen can be exchanged to configure another presentation mode for the group to
/// be stepped-in.
/// </summary>
/// <remarks>
/// Actually, we mix two different concerns in this method:
/// <list type="number">
/// <item>The setting that the new navigation context will be subordinated, i.e. it will be removed/exchanged by a filter action</item>
/// <item>The setting that all menu actions will be adopted from the parent navigation context</item>
/// </list>
/// But in fact, filter actions are only used together with the concept that there exist two different kind of navigation contexts;
/// autonomous contexts and subordinated contexts.
/// If there are no filter actions present (like in the browse media navigation modes), the only difference between the methods
/// <see cref="StackSubordinateNavigationContext"/> and <see cref="StackAutonomousNavigationContext"/> is the inheritance of the menu.
/// </remarks>
/// <param name="subViewSpecification">Specification for the sub view to be shown in the new navigation context.</param>
/// <param name="visibleScreen">Screen which should be visible in the new navigation context.</param>
/// <param name="navbarDisplayLabel">Display label to be shown in the navigation bar for the new navigation context.</param>
/// <returns>Newly created navigation data.</returns>
public NavigationData StackSubordinateNavigationContext(ViewSpecification subViewSpecification, AbstractScreenData visibleScreen,
string navbarDisplayLabel)
{
WorkflowState newState = WorkflowState.CreateTransientState(
"View: " + subViewSpecification.ViewDisplayName, subViewSpecification.ViewDisplayName,
false, null, true, WorkflowType.Workflow);
NavigationData newNavigationData = new NavigationData(this, subViewSpecification.ViewDisplayName,
_baseWorkflowStateId, newState.StateId, subViewSpecification, visibleScreen, _availableScreens, _currentSorting, true);
PushNewNavigationWorkflowState(newState, navbarDisplayLabel, newNavigationData);
return newNavigationData;
}
protected void BuildWorkflowActions()
{
_dynamicWorkflowActions = new List<WorkflowAction>(_availableScreens.Count);
int ct = 0;
foreach (AbstractScreenData screen in _availableScreens)
{
AbstractScreenData newScreen = screen; // Necessary to be used in closure
WorkflowAction action = new MethodDelegateAction(Guid.NewGuid(),
_navigationContextName + "->" + newScreen.MenuItemLabel, new Guid[] {_currentWorkflowStateId},
LocalizationHelper.CreateResourceString(newScreen.MenuItemLabel), () =>
{
_currentScreenData.ReleaseScreenData();
_currentScreenData = newScreen;
IWorkflowManager workflowManager = ServiceRegistration.Get<IWorkflowManager>();
// The last screen could have stepped into a deeper media navigation context when it had produced
// sub views. So we first have to revert our workflow to the base workflow id before moving to the new screen.
if (workflowManager.CurrentNavigationContext.WorkflowState.StateId == _baseWorkflowStateId)
{ // If we're already in the correct the state, update the screen manually
_currentScreenData.CreateScreenData(this);
SwitchToCurrentScreen();
}
else
// WF-Manager updates the screen for us
workflowManager.NavigatePopToState(_baseWorkflowStateId, false);
})
{
DisplayCategory = Consts.FILTERS_WORKFLOW_CATEGORY,
SortOrder = ct++.ToString(), // Sort in the order we have built up the filters
};
_dynamicWorkflowActions.Add(action);
}
}
/// <summary>
/// Gets a list of available screens ("filters") of the current <see cref="NavigationData"/>. This method can return either filtering screens that are showing
/// results of predefined query (<paramref name="onlySearchScreens"/>=<c>false</c>), or custom search screens that allow user input for searching (<paramref name="onlySearchScreens"/>=<c>true</c>).
/// </summary>
/// <param name="onlySearchScreens"><c>true</c> to return only search screens.</param>
/// <returns>List of workflow actions</returns>
public IList<WorkflowAction> GetWorkflowActions(bool onlySearchScreens = false)
{
IList<WorkflowAction> actions = new List<WorkflowAction>(_availableScreens.Count);
int ct = 0;
foreach (AbstractScreenData screen in _availableScreens)
{
if (onlySearchScreens && !(screen is AbstractSearchScreenData))
continue;
if (!onlySearchScreens && (screen is AbstractSearchScreenData))
continue;
AbstractScreenData newScreen = screen; // Necessary to be used in closure
WorkflowAction action = new MethodDelegateAction(Guid.NewGuid(),
_navigationContextName + "->" + newScreen.MenuItemLabel, new Guid[] { _currentWorkflowStateId },
LocalizationHelper.CreateResourceString(newScreen.MenuItemLabel), () =>
{
_currentScreenData.ReleaseScreenData();
_currentScreenData = newScreen;
string parent = Parent == null ? _navigationContextName : Parent.CurrentScreenData.GetType().ToString();
// Do not save search screens as selection, they are only a "transient" state.
if (!(newScreen is AbstractSearchScreenData))
SaveScreenHierarchy(parent, newScreen.GetType().ToString());
IWorkflowManager workflowManager = ServiceRegistration.Get<IWorkflowManager>();
// The last screen could have stepped into a deeper media navigation context when it had produced
// sub views. So we first have to revert our workflow to the base workflow id before moving to the new screen.
if (workflowManager.CurrentNavigationContext.WorkflowState.StateId == _baseWorkflowStateId)
{ // If we're already in the correct the state, update the screen manually
_currentScreenData.CreateScreenData(this);
SwitchToCurrentScreen();
}
else
// WF-Manager updates the screen for us
workflowManager.NavigatePopToState(_baseWorkflowStateId, false);
})
{
DisplayCategory = Consts.FILTERS_WORKFLOW_CATEGORY,
SortOrder = ct++.ToString(), // Sort in the order we have built up the filters
};
actions.Add(action);
}
return actions;
}
/// <summary>
/// Enters a new media navigation context by inheriting all currently available screens. This is used for
/// presenting the contents of a media items or filter group, where the current menu should remain available.
/// Only the currently visible screen can be exchanged to configure another presentation mode for the group to
/// be stepped-in.
/// </summary>
/// <remarks>
/// Actually, we mix two different concerns in this method:
/// <list type="number">
/// <item>The setting that the new navigation context will be subordinated, i.e. it will be removed/exchanged by a filter action</item>
/// <item>The setting that all menu actions will be adopted from the parent navigation context</item>
/// </list>
/// But in fact, filter actions are only used together with the concept that there exist two different kind of navigation contexts;
/// autonomous contexts and subordinated contexts.
/// If there are no filter actions present (like in the browse media navigation modes), the only difference between the methods
/// <see cref="StackSubordinateNavigationContext"/> and <see cref="StackAutonomousNavigationContext"/> is the inheritance of the menu.
/// </remarks>
/// <param name="subViewSpecification">Specification for the sub view to be shown in the new navigation context.</param>
/// <param name="visibleScreen">Screen which should be visible in the new navigation context.</param>
/// <param name="navbarDisplayLabel">Display label to be shown in the navigation bar for the new navigation context.</param>
/// <returns>Newly created navigation data.</returns>
public NavigationData StackSubordinateNavigationContext(ViewSpecification subViewSpecification, AbstractScreenData visibleScreen,
string navbarDisplayLabel)
{
WorkflowState newState = WorkflowState.CreateTransientState(
"View: " + subViewSpecification.ViewDisplayName, subViewSpecification.ViewDisplayName,
false, null, true, WorkflowType.Workflow);
ScreenConfig nextScreenConfig;
LoadLayoutSettings(visibleScreen.ToString(), out nextScreenConfig);
Sorting.Sorting nextSortingMode = AvailableSortings.FirstOrDefault(sorting => sorting.GetType().ToString() == nextScreenConfig.Sorting) ?? _currentSorting;
NavigationData newNavigationData = new NavigationData(this, subViewSpecification.ViewDisplayName,
_baseWorkflowStateId, newState.StateId, subViewSpecification, visibleScreen, _availableScreens, nextSortingMode, true)
{
LayoutType = nextScreenConfig.LayoutType,
LayoutSize = nextScreenConfig.LayoutSize
};
PushNewNavigationWorkflowState(newState, navbarDisplayLabel, newNavigationData);
return newNavigationData;
}
/// <summary>
/// Whether this screen can filter items shown by the <paramref name="parentScreen"/>.
/// The default implementation checks whether at least one of the <see cref="FilteredMias"/> is present in the <paramref name="parentScreen"/>'s <see cref="FilteredMias"/>
/// or whether <see cref="FilteredMias"/> is null on this or the parent screen.
/// Can be overriden in derived classes.
/// </summary>
/// <param name="parentScreen">The screen that is currently shown.</param>
/// <returns>True if this screen can handle items shown by the <paramref name="parentScreen"/></returns>
public virtual bool CanFilter(AbstractScreenData parentScreen)
{
return(_filteredMias == null || parentScreen == null || parentScreen.FilteredMias == null || _filteredMias.Intersect(parentScreen.FilteredMias).Count() > 0);
}
//Special case for series screen, it can support series filters and episode filters
public override bool CanFilter(AbstractScreenData parentScreen)
{
return(base.CanFilter(parentScreen) || parentScreen.FilteredMias.Contains(SeriesAspect.ASPECT_ID));
}
/// <summary>
/// Switches to browsing by MediaLibray shares, limited to restricted MediaCategories.
/// </summary>
protected void SetBrowseMode()
{
_availableScreens = null;
_defaultScreen = new BrowseMediaNavigationScreenData(_genericPlayableItemCreatorDelegate);
_customRootViewSpecification = new BrowseMediaRootProxyViewSpecification(_viewName, _necessaryMias, null, _restrictedMediaCategories);
}
