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using System;
using System.ComponentModel.Composition;
using AppKit;
using Microsoft.VisualStudio.Text.Editor;
using Microsoft.VisualStudio.Text.Editor.DragDrop;
using Microsoft.VisualStudio.Utilities;
using MonoDevelop.DesignerSupport;
using MonoDevelop.DesignerSupport.Toolbox;
using MonoDevelop.Ide.Gui.Documents;
namespace MonoDevelop.TextEditor
{
[Export (typeof (IDropHandlerProvider))]
[DropFormat (ToolboxPad.ToolBoxDragDropFormat)]
[Name (nameof(MonoDevelopToolBoxDropHandlerProvider))]
sealed class MonoDevelopToolBoxDropHandlerProvider : IDropHandlerProvider
{
public IDropHandler GetAssociatedDropHandler (ICocoaTextView cocoaTextView)
{
return new MonoDevelopToolBoxDropHandler (cocoaTextView);
}
}
sealed class MonoDevelopToolBoxDropHandler : IDropHandler
{
private ICocoaTextView cocoaTextView;
public MonoDevelopToolBoxDropHandler (ICocoaTextView cocoaTextView)
{
this.cocoaTextView = cocoaTextView;
}
private bool TryGetConsumer (out IToolboxConsumer toolboxConsumer)
{
if (cocoaTextView.Properties.TryGetProperty<DocumentController> (typeof (DocumentController), out var controller)) {
if (controller.GetContent<IToolboxConsumer> () is IToolboxConsumer consumer) {
var selectedItem = DesignerSupport.DesignerSupport.Service.ToolboxService.SelectedItem;
if (DesignerSupport.DesignerSupport.Service.ToolboxService.IsSupported (selectedItem, consumer)) {
toolboxConsumer = consumer;
return true;
}
}
}
toolboxConsumer = null;
return false;
}
public DragDropPointerEffects HandleDataDropped (DragDropInfo dragDropInfo)
{
if (TryGetConsumer (out var consumer)) {
cocoaTextView.Caret.MoveTo (dragDropInfo.VirtualBufferPosition);
consumer.ConsumeItem (DesignerSupport.DesignerSupport.Service.ToolboxService.SelectedItem);
return DragDropPointerEffects.Move | DragDropPointerEffects.Track;
}
return DragDropPointerEffects.None;
}
public void HandleDragCanceled ()
{
}
public DragDropPointerEffects HandleDraggingOver (DragDropInfo dragDropInfo)
{
if (TryGetConsumer (out var _))
return DragDropPointerEffects.Move | DragDropPointerEffects.Track;
else
return DragDropPointerEffects.None;
}
public DragDropPointerEffects HandleDragStarted (DragDropInfo dragDropInfo)
{
if (TryGetConsumer (out var _))
return DragDropPointerEffects.Move | DragDropPointerEffects.Track;
else
return DragDropPointerEffects.None;
}
public bool IsDropEnabled (DragDropInfo dragDropInfo)
{
return true;
}
}
}
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