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using System;
using System.Collections.Generic;
using AppKit;
using Foundation;
using Xamarin.PropertyEditing.ViewModels;
namespace Xamarin.PropertyEditing.Mac
{
internal class PathOutlineView : BaseSelectorOutlineView
{
private IReadOnlyCollection<object> itemsSource;
private PropertyTreeRoot propertyTreeRoot;
private void SetItemsSource (IReadOnlyCollection<object> value, string targetName)
{
if (this.itemsSource != value) {
this.itemsSource = value;
DataSource = new PathOutlineViewDataSource (this.itemsSource, targetName); ;
Delegate = new PathOutlineViewDelegate ();
ReloadData ();
ExpandItem (ItemAtRow (0));
}
}
public PropertyTreeRoot PropertyTreeRoot
{
get { return this.propertyTreeRoot; }
internal set
{
if (this.propertyTreeRoot != value) {
this.propertyTreeRoot = value;
if (this.propertyTreeRoot != null) {
SetItemsSource (this.propertyTreeRoot.Children, this.propertyTreeRoot.TargetType.Name);
} else {
SetItemsSource (null, string.Empty);
}
}
}
}
}
internal class PathOutlineViewDelegate : NSOutlineViewDelegate
{
private const string PathIdentifier = "path";
public override NSView GetView (NSOutlineView outlineView, NSTableColumn tableColumn, NSObject item)
{
var labelContainer = (UnfocusableTextField)outlineView.MakeView (PathIdentifier, this);
if (labelContainer == null) {
labelContainer = new UnfocusableTextField {
Identifier = PathIdentifier,
};
}
var target = (item as NSObjectFacade).Target;
switch (target) {
case PropertyTreeElement propertyTreeElement:
labelContainer.StringValue = string.Format ("{0}: ({1})", propertyTreeElement.Property.Name, propertyTreeElement.Property.RealType.Name);
break;
case string targetName:
labelContainer.StringValue = targetName;
break;
default:
labelContainer.StringValue = Properties.Resources.TypeNotSupported;
break;
}
return labelContainer;
}
public override bool ShouldSelectItem (NSOutlineView outlineView, NSObject item)
{
if (item is NSObjectFacade facade) {
switch (facade.Target) {
case PropertyTreeElement propertyTreeElement:
var propertyTreeResult = propertyTreeElement.Children.Task.Result;
return propertyTreeResult.Count == 0;
default:
return false;
}
} else {
return false;
}
}
}
internal class PathOutlineViewDataSource : NSOutlineViewDataSource
{
private readonly IReadOnlyCollection<object> itemsSource;
private readonly string targetName;
internal PathOutlineViewDataSource (IReadOnlyCollection<object> itemsSource, string targetName)
{
this.itemsSource = itemsSource;
this.targetName = targetName;
}
public override nint GetChildrenCount (NSOutlineView outlineView, NSObject item)
{
if (item == null) {
return this.itemsSource != null ? this.itemsSource.Count + 1 : 0;
} else {
var target = (item as NSObjectFacade).Target;
switch (target) {
case PropertyTreeElement propertyTreeElement:
IReadOnlyCollection<PropertyTreeElement> propertyTrees = propertyTreeElement.Children.Task.Result;
return propertyTrees.Count;
case string targetName:
return this.itemsSource.Count;
default:
return 0;
}
}
}
public override NSObject GetChild (NSOutlineView outlineView, nint childIndex, NSObject item)
{
if (childIndex == 0 && item == null) {
return new NSObjectFacade (targetName);
}
if (item is NSObjectFacade objectFacade) {
var target = objectFacade.Target;
switch (target) {
case PropertyTreeElement propertyTreeElement:
IReadOnlyCollection<PropertyTreeElement> propertyTrees = propertyTreeElement.Children.Task.Result;
return new NSObjectFacade (propertyTrees.ElementAt ((int)childIndex));
case string targetName:
return new NSObjectFacade (this.itemsSource.ElementAt ((int)childIndex));
default:
return null;
}
}
return null;
}
public override bool ItemExpandable (NSOutlineView outlineView, NSObject item)
{
if (item is NSObjectFacade objectFacade) {
var target = objectFacade.Target;
switch (target) {
case PropertyTreeElement propertyTreeElement:
IReadOnlyCollection<PropertyTreeElement> propertyTrees = propertyTreeElement.Children.Task.Result;
return propertyTrees.Count > 0;
case string targetName:
return true;
default:
return false;
}
}
return false;
}
}
}
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