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using System;
using System.Linq;
using AppKit;
using Foundation;
namespace Xamarin.PropertyEditing.Mac
{
internal class BindingResourceOutlineView : BaseSelectorOutlineView
{
private ILookup<ResourceSource, Resource> itemsSource;
public ILookup<ResourceSource, Resource> ItemsSource
{
get => this.itemsSource;
set
{
if (this.itemsSource != value) {
this.itemsSource = value;
DataSource = new BindingResourceOutlineViewDataSource (this.itemsSource);
Delegate = new BindingResourceOutlineViewDelegate ();
}
ReloadData ();
ExpandItem (null, true);
}
}
}
internal class BindingResourceOutlineViewDelegate : NSOutlineViewDelegate
{
private const string ResourceIdentifier = "resource";
public override NSView GetView (NSOutlineView outlineView, NSTableColumn tableColumn, NSObject item)
{
var labelContainer = (UnfocusableTextField)outlineView.MakeView (ResourceIdentifier, this);
if (labelContainer == null) {
labelContainer = new UnfocusableTextField {
Identifier = ResourceIdentifier,
};
}
var target = (item as NSObjectFacade).Target;
switch (target) {
case IGrouping<ResourceSource, Resource> kvp:
labelContainer.StringValue = kvp.Key.Name;
break;
case Resource resource:
labelContainer.StringValue = resource.Name;
break;
default:
labelContainer.StringValue = Properties.Resources.ResourceNotSupported;
break;
}
return labelContainer;
}
public override bool ShouldSelectItem (NSOutlineView outlineView, NSObject item)
{
var target = (item as NSObjectFacade).Target;
switch (target) {
case IGrouping<ResourceSource, Resource> kvp:
return false;
case Resource resource:
return true;
default:
return false;
}
}
}
internal class BindingResourceOutlineViewDataSource : NSOutlineViewDataSource
{
public ILookup<ResourceSource, Resource> ItemsSource { get; }
internal BindingResourceOutlineViewDataSource (ILookup<ResourceSource, Resource> itemsSource)
{
if (itemsSource == null)
throw new ArgumentNullException (nameof (itemsSource));
ItemsSource = itemsSource;
}
public override nint GetChildrenCount (NSOutlineView outlineView, NSObject item)
{
if (item == null) {
return ItemsSource != null ? ItemsSource.Count : 0;
} else {
var target = (item as NSObjectFacade).Target;
switch (target) {
case IGrouping<ResourceSource, Resource> kvp:
return kvp.Count ();
case Resource resource:
return 0;
default:
return 0;
}
}
}
public override NSObject GetChild (NSOutlineView outlineView, nint childIndex, NSObject item)
{
object element;
if (item == null) {
element = ItemsSource.ElementAt ((int)childIndex);
} else {
var target = (item as NSObjectFacade).Target;
switch (target) {
case IGrouping<ResourceSource, Resource> kvp:
element = kvp.ElementAt ((int)childIndex);
break;
case Resource resource:
element = resource;
break;
default:
return null;
}
}
return new NSObjectFacade (element);
}
public override bool ItemExpandable (NSOutlineView outlineView, NSObject item)
{
var target = (item as NSObjectFacade).Target;
switch (target) {
case IGrouping<ResourceSource, Resource> kvp:
return kvp.Any ();
case Resource resource:
return false;
default:
return false;
}
}
}
}
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