protected NavigationPageCollection GetNonRemovedDescendants(NavigationPageCollection removedNodes)
{
if (removedNodes == null)
{
throw new ArgumentNullException("removedNodes");
}
bool alwaysIncludeChildrenOfRemovedNodes = this.IncludeChildrenOfRemovedNodesMode.Equals(IncludeChildrenOfRemovedNodesMode.Always);
var nonRemovedDescendants = new NavigationPageCollection();
foreach (var removedNode in removedNodes)
{
if (alwaysIncludeChildrenOfRemovedNodes || this.IsPageInSelectedPath(this.RootPage, removedNode, this.SelectedNavigationPage))
{
foreach (var child in this.GetChildren(removedNode))
{
if (alwaysIncludeChildrenOfRemovedNodes || this.IsPageInSelectedPath(this.RootPage, child, this.SelectedNavigationPage))
{
nonRemovedDescendants.Add(child);
}
}
var removedChildNodes = new NavigationPageCollection();
nonRemovedDescendants = this.FilterNavigation(nonRemovedDescendants, removedChildNodes);
nonRemovedDescendants.AddRange(GetNonRemovedDescendants(removedChildNodes));
}
}
return(nonRemovedDescendants);
}
protected virtual bool VisibleInNavigation(INavigationPage page)
{
if (page == null)
{
throw new ArgumentNullException("page");
}
var pdc = new NavigationPageCollection();
pdc.Add(page);
pdc = this.FilterNavigation(pdc, null);
return(pdc.Count > 0);
}
public override void DataBind()
{
this.hedHeadline.InnerSpan = this.HeadingInnerSpan;
this.hedHeadline.Level = this.HeadingLevel;
if (this.HeaderTemplate == null)
{
this.HeaderTemplate = new DefaultHeaderTemplate(this.RenderId ? this.ID : null, this.CssClass);
}
if (this.ItemTemplate == null)
{
this.ItemTemplate = new DefaultItemTemplate();
}
if (this.FooterTemplate == null)
{
this.FooterTemplate = new DefaultFooterTemplate();
}
if (this.PopulateNavigationItemDelegate == null)
{
this.PopulateNavigationItemDelegate = PopulateNavigationItem;
}
if (this.GetNavigationItemNameDelegate == null)
{
this.GetNavigationItemNameDelegate = GetNavigationItemName;
}
if (this.GetNavigationItemLinkDelegate == null)
{
this.GetNavigationItemLinkDelegate = GetNavigationItemLink;
}
if (this.GetNavigationItemDelegate == null)
{
this.GetNavigationItemDelegate = GetNavigationItem;
}
if (this.GetNavigationAnchorDelegate == null)
{
this.GetNavigationAnchorDelegate = GetNavigationAnchor;
}
if (this.CreateWebNavigationControlDelegate == null)
{
this.CreateWebNavigationControlDelegate = this.CreateWebNavigationControl;
}
this.OnDataBinding(EventArgs.Empty);
if (this.StartLevelFromRoot < 0)
{
this.StartLevelFromRoot = this.ExpandAll ? 0 : 1;
}
if (this.SelectedNavigationPage == null)
{
this.SelectedNavigationPage = this.CurrentPage;
}
if (this.RootPage == null || this.RootPage.Id == null)
{
this.RootPage = this.SiteRoot;
}
if (!this.HeadingVisible && !this.HeadingAlwaysVisible)
{
hedHeadline.Visible = false;
}
if (this.NavPage == null)
{
this.NavPage = GetPageToExpand(this.RootPage, this.SelectedNavigationPage, this.StartLevelFromRoot);
}
if (this.NavPage == null && this.FallbackStartLevel >= 0)
{
this.NavPage = GetPageToExpand(this.RootPage, this.SelectedNavigationPage, this.FallbackStartLevel);
}
if (this.NavPage != null)
{
var npa = new WebNavigationPageArgs(this.NavPage);
ancHeadline.Text = this.GetNavigationItemNameDelegate(npa);
if (this.HeadingClickable)
{
ancHeadline.NavigateUrl = this.GetNavigationItemLinkDelegate(npa);
}
else
{
ancHeadline.NoLink = true;
}
NavigationPageCollection childNodes;
if (this.IncludeRootLevelInList)
{
childNodes = new NavigationPageCollection();
childNodes.Add(this.NavPage);
}
else if (this.NavPage.Id.Equals(this.RootPage.Id) ||
this.IncludeChildrenOfRemovedNodesMode.Equals(IncludeChildrenOfRemovedNodesMode.Always) ||
this.FilterNavigation(new NavigationPageCollection(new[] { this.NavPage }), null).Count.Equals(1))
{
childNodes = this.GetChildren(this.NavPage);
}
else
{
childNodes = new NavigationPageCollection();
if (this.IncludeChildrenOfRemovedNodesMode.Equals(IncludeChildrenOfRemovedNodesMode.OnlyInSelectedPath))
{
foreach (var child in this.GetChildren(this.NavPage))
{
if (this.IsPageInSelectedPath(this.RootPage, child, this.SelectedNavigationPage))
{
childNodes.Add(child);
}
}
}
}
var removedChildNodes =
!this.IncludeRootLevelInList && this.IncludeChildrenOfRemovedNodesMode > IncludeChildrenOfRemovedNodesMode.Never ?
new NavigationPageCollection() : null;
childNodes = FilterNavigation(childNodes, removedChildNodes);
if (!this.IncludeRootLevelInList &&
this.IncludeChildrenOfRemovedNodesMode > IncludeChildrenOfRemovedNodesMode.Never)
{
var nonRemovedDescendants = GetNonRemovedDescendants(removedChildNodes);
if (this.IncludeChildrenOfRemovedNodesMode.Equals(IncludeChildrenOfRemovedNodesMode.OnlyInSelectedPath))
{
foreach (var descendant in nonRemovedDescendants)
{
if (this.IsPageInSelectedPath(this.RootPage, descendant, this.SelectedNavigationPage))
{
childNodes.Add(descendant);
}
}
}
else
{
childNodes.AddRange(nonRemovedDescendants);
}
}
rptNavigation.DataSource = childNodes;
rptNavigation.DataBind();
}
if (this.visibleChildren == 0)
{
if (this.HeadingAlwaysVisible && ancHeadline.Text.Length > 0)
{
rptNavigation.Visible = false;
}
else
{
this.Visible = false;
}
}
else
{
this.visibleLevels++;
}
OnDataBound(EventArgs.Empty);
}
protected NavigationPageCollection GetSelectedPath(INavigationPage navigationRoot, INavigationPage currentPageReference, NavigationPageCollection pageDataCollection)
{
if (pageDataCollection == null)
{
throw new ArgumentNullException("pageDataCollection");
}
var subPage = this.GetNavigationPage(currentPageReference);
if (subPage != null)
{
var count = pageDataCollection.Count;
pageDataCollection.Insert(0, subPage);
if (count == 0) // Remove all non visible pages unitl if there already isn't a visible page in the path
{
pageDataCollection = this.FilterNavigation(pageDataCollection, null);
}
}
var parent = subPage != null?this.GetNavigationPage(subPage.ParentId) : null;
if (subPage == null || subPage.Id.Equals(navigationRoot.Id) || parent == null)
{
return(pageDataCollection);
}
return(this.GetSelectedPath(navigationRoot, parent, pageDataCollection));
}
protected abstract NavigationPageCollection FilterNavigation(NavigationPageCollection childNodes, NavigationPageCollection removedChildNodes);
