void IMauiContainerElementHandler.AddChild(MC.Element child, int physicalSiblingIndex)
{
var index = Math.Min(physicalSiblingIndex, Elements.Count);
Elements.Insert(index, child);
ChildAdded?.Invoke(child);
}
public virtual void RemoveChild(MC.Element child)
{
if (ContentPageControl.Content == child)
{
ContentPageControl.Content = null;
}
}
public virtual void RemoveChild(MC.Element child)
{
if (ShellContentControl.Content == child)
{
ShellContentControl.Content = null;
}
}
public virtual void AddChild(MC.Element child, int physicalSiblingIndex)
{
if (child is null)
{
throw new ArgumentNullException(nameof(child));
}
MC.ShellItem itemToAdd = child switch
{
MC.TemplatedPage childAsTemplatedPage => childAsTemplatedPage, // Implicit conversion
MC.ShellContent childAsShellContent => childAsShellContent, // Implicit conversion
MC.ShellSection childAsShellSection => childAsShellSection, // Implicit conversion
MC.MenuItem childAsMenuItem => childAsMenuItem, // Implicit conversion
MC.ShellItem childAsShellItem => childAsShellItem,
_ => throw new NotSupportedException($"Handler of type '{GetType().FullName}' representing element type '{TargetElement?.GetType().FullName ?? "<null>"}' doesn't support adding a child (child type is '{child.GetType().FullName}').")
};
if (ShellControl.Items.Count >= physicalSiblingIndex)
{
ShellControl.Items.Insert(physicalSiblingIndex, itemToAdd);
}
else
{
Debug.WriteLine($"WARNING: {nameof(AddChild)} called with {nameof(physicalSiblingIndex)}={physicalSiblingIndex}, but ShellControl.Items.Count={ShellControl.Items.Count}");
ShellControl.Items.Add(itemToAdd);
}
}
public void RemoveChild(MC.Element child)
{
if (ScrollViewControl.Content == child)
{
ScrollViewControl.Content = null;
}
}
private MC.ShellContent GetContentForChild(MC.Element child)
{
return(child switch
{
MC.TemplatedPage childAsTemplatedPage => GetContentForTemplatePage(childAsTemplatedPage),
MC.ShellContent childAsShellContent => childAsShellContent,
_ => null
});
public override void SetParent(MC.Element parent)
{
if (ElementControl.Parent == null)
{
// The Parent should already be set
throw new InvalidOperationException("Shouldn't need to set parent here...");
}
}
public int GetChildIndex(MC.Element child)
{
// Not sure whether elements "order" matters here
return(child switch
{
_ when child == FlyoutPageControl.Flyout => 0,
_ when child == FlyoutPageControl.Detail => 1,
_ => - 1
});
public int GetChildIndex(MC.Element child)
{
if (!(child is MC.View childView))
{
return(-1);
}
return(_children.IndexOf(childView));
}
public void RemoveChild(MC.Element child)
{
if (!(child is MC.GradientStop gradientStopChild))
{
throw new ArgumentException($"GradientBrush support GradientStop child elements only, but {child?.GetType()} found instead.", nameof(child));
}
GradientBrushControl.GradientStops.Remove(gradientStopChild);
}
private MC.ShellSection GetSectionForElement(MC.Element child)
{
return(child switch
{
MC.TemplatedPage childAsTemplatedPage => GetSectionForTemplatedPage(childAsTemplatedPage),
MC.ShellContent childAsShellContent => GetSectionForContent(childAsShellContent),
MC.ShellSection childAsShellSection => childAsShellSection,
_ => null
});
void IMauiContainerElementHandler.AddChild(MC.Element child, int physicalSiblingIndex)
{
if (!(child is TItemType typedChild))
{
throw new NotSupportedException($"Cannot add item of type {child?.GetType().Name} to a {typeof(TItemType)} collection.");
}
_propertyItems.Insert(physicalSiblingIndex, typedChild);
}
public int GetChildIndex(MC.Element child)
{
if (!(child is MC.GradientStop gradientStopChild))
{
throw new ArgumentException($"GradientBrush support GradientStop child elements only, but {child?.GetType()} found instead.", nameof(child));
}
return(GradientBrushControl.GradientStops.IndexOf(gradientStopChild));
}
public void RemoveChild(MC.Element child)
{
if (!(child is MC.View childView))
{
throw new ArgumentException($"Expected parent to be of type {typeof(MC.View).FullName} but it is of type {child?.GetType().FullName}.", nameof(child));
}
_children.Remove(childView);
_parentGrid.Children.Remove(childView);
}
private MC.ShellItem GetItemForElement(MC.Element child)
{
return(child switch
{
MC.TemplatedPage childAsTemplatedPage => GetItemForTemplatedPage(childAsTemplatedPage),
MC.ShellContent childAsShellContent => GetItemForContent(childAsShellContent),
MC.ShellSection childAsShellSection => GetItemForSection(childAsShellSection),
MC.MenuItem childAsMenuItem => GetItemForMenuItem(childAsMenuItem),
MC.ShellItem childAsShellItem => childAsShellItem,
_ => null
});
public Task <TComponent> AddComponent <TComponent>(MC.Element parent, Dictionary <string, object> parameters = null) where TComponent : IComponent
{
if (parent is MC.Application app)
{
app.MainPage ??= new MC.ContentPage();
}
var handler = CreateHandler(parent, this);
return(AddComponent <TComponent>(handler, parameters));
}
public virtual void RemoveChild(MC.Element child)
{
if (child is null)
{
throw new ArgumentNullException(nameof(child));
}
var itemToRemove = GetItemForElement(child)
?? throw new NotSupportedException($"Handler of type '{GetType().FullName}' representing element type '{TargetElement?.GetType().FullName ?? "<null>"}' doesn't support removing a child (child type is '{child.GetType().FullName}').");
ShellControl.Items.Remove(itemToRemove);
}
public int GetChildIndex(MC.Element child)
{
// There are two cases to consider:
// 1. A Xamarin.Forms Label can have only 1 child (a FormattedString), so the child's index is always 0.
// 2. But to simplify things, in MobileBlazorBindings a Label can contain a Span directly, so if the child
// is a Span, we have to compute its sibling index.
return(child switch
{
MC.Span span => LabelControl.FormattedText?.Spans.IndexOf(span) ?? -1,
MC.FormattedString formattedString when LabelControl.FormattedText == formattedString => 0,
_ => - 1
});
public virtual void AddChild(MC.Element child, int physicalSiblingIndex)
{
var childAsView = child as IView;
if (physicalSiblingIndex <= LayoutControl.Children.Count)
{
LayoutControl.Children.Insert(physicalSiblingIndex, childAsView);
}
else
{
Debug.WriteLine($"WARNING: {nameof(AddChild)} called with {nameof(physicalSiblingIndex)}={physicalSiblingIndex}, but layoutControlOfView.Children.Count={LayoutControl.Children.Count}");
LayoutControl.Children.Add(childAsView);
}
}
public virtual void AddChild(MC.Element child, int physicalSiblingIndex)
{
var childAsPage = child as MC.Page;
if (physicalSiblingIndex <= TabbedPageControl.Children.Count)
{
TabbedPageControl.Children.Insert(physicalSiblingIndex, childAsPage);
}
else
{
Debug.WriteLine($"WARNING: {nameof(AddChild)} called with {nameof(physicalSiblingIndex)}={physicalSiblingIndex}, but TabbedPageControl.Children.Count={TabbedPageControl.Children.Count}");
TabbedPageControl.Children.Add(childAsPage);
}
}
public void AddChild(MC.Element child, int physicalSiblingIndex)
{
if (!(child is MC.View childView))
{
throw new ArgumentException($"Expected parent to be of type {typeof(MC.View).FullName} but it is of type {child?.GetType().FullName}.", nameof(child));
}
MC.Grid.SetColumn(childView, Column);
MC.Grid.SetColumnSpan(childView, ColumnSpan);
MC.Grid.SetRow(childView, Row);
MC.Grid.SetRowSpan(childView, RowSpan);
_children.Add(childView);
_parentGrid.Children.Add(childView);
}
private static ElementHandler CreateHandler(MC.Element parent, MobileBlazorBindingsRenderer renderer)
{
return(parent switch
{
MC.ContentPage contentPage => new ContentPageHandler(renderer, contentPage),
MC.ContentView contentView => new ContentViewHandler(renderer, contentView),
MC.Label label => new LabelHandler(renderer, label),
MC.FlyoutPage flyoutPage => new FlyoutPageHandler(renderer, flyoutPage),
MC.ScrollView scrollView => new ScrollViewHandler(renderer, scrollView),
MC.ShellContent shellContent => new ShellContentHandler(renderer, shellContent),
MC.Shell shell => new ShellHandler(renderer, shell),
MC.ShellItem shellItem => new ShellItemHandler(renderer, shellItem),
MC.ShellSection shellSection => new ShellSectionHandler(renderer, shellSection),
MC.TabbedPage tabbedPage => new TabbedPageHandler(renderer, tabbedPage),
_ => new ElementHandler(renderer, parent),
});
public virtual void AddChild(MC.Element child, int physicalSiblingIndex)
{
var childAsSpan = child as MC.Span;
var formattedString = GetFormattedString();
if (physicalSiblingIndex <= formattedString.Spans.Count)
{
formattedString.Spans.Insert(physicalSiblingIndex, childAsSpan);
}
else
{
Debug.WriteLine($"WARNING: {nameof(AddChild)} called with {nameof(physicalSiblingIndex)}={physicalSiblingIndex}, but Label.FormattedText.Spans.Count={LabelControl.FormattedText.Spans.Count}");
formattedString.Spans.Add(childAsSpan);
}
}
public void AddChild(MC.Element child, int physicalSiblingIndex)
{
if (!(child is MC.GradientStop gradientStopChild))
{
throw new ArgumentException($"GradientBrush support GradientStop child elements only, but {child?.GetType()} found instead.", nameof(child));
}
if (physicalSiblingIndex <= GradientBrushControl.GradientStops.Count)
{
GradientBrushControl.GradientStops.Insert(physicalSiblingIndex, gradientStopChild);
}
else
{
Debug.WriteLine($"WARNING: {nameof(AddChild)} called with {nameof(physicalSiblingIndex)}={physicalSiblingIndex}, but GradientBrushControl.GradientStops.Count={GradientBrushControl.GradientStops}");
GradientBrushControl.GradientStops.Add(gradientStopChild);
}
}
public virtual void AddChild(MC.Element child, int physicalSiblingIndex)
{
if (child is null)
{
throw new ArgumentNullException(nameof(child));
}
if (child is FlyoutFlyoutPageContentPage masterPage)
{
FlyoutPageControl.Flyout = masterPage;
}
else if (child is FlyoutDetailPageContentPage detailPage)
{
FlyoutPageControl.Detail = detailPage;
}
else
{
throw new InvalidOperationException($"Unknown child type {child.GetType().FullName} being added to parent element type {GetType().FullName}.");
}
}
public virtual void RemoveChild(MC.Element child)
{
if (child is null)
{
throw new ArgumentNullException(nameof(child));
}
if (child == FlyoutPageControl.Flyout)
{
FlyoutPageControl.Flyout = new MC.Page()
{
Title = "Title"
};
}
else if (child == FlyoutPageControl.Detail)
{
FlyoutPageControl.Detail = new MC.Page();
}
else
{
throw new InvalidOperationException($"Unknown child type {child.GetType().FullName} being removed from parent element type {GetType().FullName}.");
}
}
public virtual void SetParent(MC.Element parent)
{
ElementControl.Parent = parent;
}
public virtual bool IsParentedTo(MC.Element parent)
{
return(ElementControl.Parent == parent);
}
public ElementHandler(NativeComponentRenderer renderer, MC.Element elementControl)
{
Renderer = renderer ?? throw new ArgumentNullException(nameof(renderer));
ElementControl = elementControl ?? throw new ArgumentNullException(nameof(elementControl));
}
void IMauiElementHandler.SetParent(MC.Element parent)
{
}
