protected override void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
if (disposing)
{
var viewsToLookAt = new FormsStack <NSView>(Subviews);
while (viewsToLookAt.Count > 0)
{
var view = viewsToLookAt.Pop();
var viewCellRenderer = view as ViewCellNSView;
if (viewCellRenderer != null)
{
viewCellRenderer.RemoveFromSuperview();
viewCellRenderer.Dispose();
}
else
{
foreach (var child in view.Subviews)
{
viewsToLookAt.Push(child);
}
}
}
}
_disposed = true;
base.Dispose(disposing);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (NavigationController != null)
{
NavigationController.PushRequested -= OnPushRequested;
NavigationController.PopRequested -= OnPopRequested;
NavigationController.PopToRootRequested -= OnPopToRootRequested;
NavigationController.RemovePageRequested -= OnRemovedPageRequested;
NavigationController.InsertPageBeforeRequested -= OnInsertPageBeforeRequested;
}
_toolbarTracker = null;
if (_currentPage != null)
{
_currentPage.PropertyChanged -= OnCurrentPagePropertyChanged;
_currentPage = null;
}
if (_currentStack != null)
{
_currentStack.ForEach(s => s.Dispose());
_currentStack = null;
}
}
base.Dispose(disposing);
}
protected override void Dispose(bool disposing)
{
if (disposing && _insetTracker != null)
{
_insetTracker.Dispose();
_insetTracker = null;
var viewsToLookAt = new FormsStack <UIView>(Subviews);
while (viewsToLookAt.Count > 0)
{
var view = viewsToLookAt.Pop();
var viewCellRenderer = view as ViewCellRenderer.ViewTableCell;
if (viewCellRenderer != null)
{
viewCellRenderer.Dispose();
}
else
{
foreach (var child in view.Subviews)
{
viewsToLookAt.Push(child);
}
}
}
}
base.Dispose(disposing);
}
void ClearChildren(ViewGroup group)
{
if (group == null)
{
return;
}
int count = group.ChildCount;
for (var i = 0; i < count; i++)
{
AView child = group.GetChildAt(i);
var g = child as ViewGroup;
if (g != null)
{
ClearChildren(g);
}
Type childType = child.GetType();
FormsStack <AView> stack;
if (!_freeViews.TryGetValue(childType, out stack))
{
_freeViews[childType] = stack = new FormsStack <AView>();
}
stack.Push(child);
}
group.RemoveAllViews();
}
void InsertPageBefore(Page page, Page before)
{
if (before == null)
{
throw new ArgumentNullException(nameof(before));
}
if (page == null)
{
throw new ArgumentNullException(nameof(page));
}
var currentList = _currentStack.Reverse().ToList();
var beforePageIndex = currentList.IndexOf(p => p.Page == before);
var pageWrapper = new NavigationChildPageWrapper(page);
currentList.Insert(beforePageIndex, pageWrapper);
_currentStack = new FormsStack <NavigationChildPageWrapper>(currentList);
var vc = CreateViewControllerForPage(page);
vc.SetElementSize(new Size(View.Bounds.Width, View.Bounds.Height));
page.Layout(new Rectangle(0, 0, View.Bounds.Width, View.Frame.Height));
vc.NativeView.WantsLayer = true;
var beforeRenderer = Platform.GetRenderer(before);
var beforeControllerIndex = ChildViewControllers.IndexOf(beforeRenderer.ViewController);
InsertChildViewController(vc.ViewController, beforeControllerIndex);
View.AddSubview(vc.NativeView, NSWindowOrderingMode.Below, beforeRenderer.NativeView);
}
void PushRenderer(IVisualElementRenderer renderer)
{
var reflectableType = renderer as System.Reflection.IReflectableType;
var rendererType = reflectableType != null?reflectableType.GetTypeInfo().AsType() : renderer.GetType();
FormsStack <IVisualElementRenderer> renderers;
if (!_freeRenderers.TryGetValue(rendererType, out renderers))
{
_freeRenderers[rendererType] = renderers = new FormsStack <IVisualElementRenderer>();
}
renderers.Push(renderer);
}
void RemovePage(Page page, bool removeFromStack)
{
page?.SendDisappearing();
var target = Platform.GetRenderer(page);
target?.NativeView?.RemoveFromSuperview();
target?.ViewController?.RemoveFromParentViewController();
target?.Dispose();
if (removeFromStack)
{
var newSource = _currentStack.Reverse().Where(w => w.Page != page);
_currentStack = new FormsStack <NavigationChildPageWrapper>(newSource);
}
}
protected override void Dispose(bool disposing)
{
if (!_disposed && disposing)
{
if (Element != null)
{
if (NavigationPage != null)
{
NavigationPage.PushRequested -= OnPushRequested;
NavigationPage.PopRequested -= OnPopRequested;
NavigationPage.PopToRootRequested -= OnPopToRootRequested;
NavigationPage.RemovePageRequested -= OnRemovedPageRequested;
NavigationPage.InsertPageBeforeRequested -= OnInsertPageBeforeRequested;
NavigationPage.Popped -= OnPopped;
NavigationPage.PoppedToRoot -= OnPoppedToRoot;
NavigationPage.SendDisappearing();
}
((Element as IPageContainer <Page>)?.CurrentPage as Page)?.SendDisappearing();
Element.PropertyChanged -= OnElementPropertyChanged;
Platform.SetRenderer(Element, null);
Element = null;
}
_tracker?.Dispose();
_tracker = null;
_events?.Dispose();
_events = null;
if (_currentStack != null)
{
foreach (var childPageWrapper in _currentStack)
{
childPageWrapper.Dispose();
}
_currentStack.Clear();
_currentStack = null;
}
Platform.NativeToolbarTracker.Navigation = null;
_disposed = true;
}
base.Dispose(disposing);
}
public NavigationPageRenderer()
{
_currentStack = new FormsStack <NavigationChildPage>();
_toolbarTracker = new GtkToolbarTracker();
}