From febb3c2f720678e077b2d23316e1bfa7664861a3 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Tue, 7 Jul 2020 21:49:44 +0000
Subject: Added cut/copy/paste.  Hopefully fixed up code to get current view
 controller.

---
 SpriteEd/AppDelegate.cs    | 71 +++++++++++++++++++++++++++++++++-----
 SpriteEd/NSSpriteEdit.cs   |  5 +++
 SpriteEd/ViewController.cs | 86 +++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 152 insertions(+), 10 deletions(-)

diff --git a/SpriteEd/AppDelegate.cs b/SpriteEd/AppDelegate.cs
index 3756e70..c213a25 100644
--- a/SpriteEd/AppDelegate.cs
+++ b/SpriteEd/AppDelegate.cs
@@ -24,34 +24,46 @@ namespace SpriteEd
     [Register("AppDelegate")]
     public class AppDelegate : NSApplicationDelegate
     {
+        private Sprite m_copy;
+
+        /// <summary>
+        /// Default constructor.
+        /// </summary>
         public AppDelegate()
         {
         }
 
+        /// <summary>
+        /// Initialise the application/
+        /// </summary>
+        /// <param name="notification">The notification.</param>
         public override void DidFinishLaunching(NSNotification notification)
         {
-            // Insert code here to initialize your application
         }
 
+        /// <summary>
+        /// Tear-down the application.
+        /// </summary>
+        /// <param name="notification">The notification.</param>
         public override void WillTerminate(NSNotification notification)
         {
-            // Insert code here to tear down your application
         }
 
+        /// <summary>
+        /// Get the current view controller.
+        /// </summary>
         private ViewController ViewController
         {
             get
             {
-                NSWindowController controller = NSApplication.SharedApplication.KeyWindow.WindowController as NSWindowController;
-                return controller.ContentViewController as ViewController;
+                return NSApplication.SharedApplication.KeyWindow.ContentViewController as ViewController;
             }
         }
 
-        [Export("newDocument:")]
-        private void OnNewDocument(NSObject sender)
-        {
-        }
-
+        /// <summary>
+        /// Handle Save Document As.
+        /// </summary>
+        /// <param name="sender">The event sender.</param>
         [Export("saveDocumentAs:")]
         private void OnSaveDocumentAs(NSObject sender)
         {
@@ -80,6 +92,10 @@ namespace SpriteEd
             }
         }
 
+        /// <summary>
+        /// Handle Save Document.
+        /// </summary>
+        /// <param name="sender">The event sender.</param>
         [Export("saveDocument:")]
         private void OnSaveDocument(NSObject sender)
         {
@@ -104,6 +120,10 @@ namespace SpriteEd
             }
         }
 
+        /// <summary>
+        /// Handle Open Document.
+        /// </summary>
+        /// <param name="sender">The event sender.</param>
         [Export("openDocument:")]
         private void OnOpenDocument(NSObject sender)
         {
@@ -136,5 +156,38 @@ namespace SpriteEd
                 }
             }
         }
+
+        /// <summary>
+        /// Handle Cut.
+        /// </summary>
+        /// <param name="sender">The event sender.</param>
+        [Export("cut:")]
+        private void OnCut(NSObject sender)
+        {
+            m_copy = ViewController.CutOrCopy(true);
+        }
+
+        /// <summary>
+        /// Handle Copy.
+        /// </summary>
+        /// <param name="sender">The event sender.</param>
+        [Export("copy:")]
+        private void OnCopy(NSObject sender)
+        {
+            m_copy = ViewController.CutOrCopy(false);
+        }
+
+        /// <summary>
+        /// Handle Paste.
+        /// </summary>
+        /// <param name="sender">The event sender.</param>
+        [Export("paste:")]
+        private void OnPaste(NSObject sender)
+        {
+            if (m_copy != null)
+            {
+                ViewController.Paste(m_copy);
+            }
+        }
     }
 }
diff --git a/SpriteEd/NSSpriteEdit.cs b/SpriteEd/NSSpriteEdit.cs
index f5d5dc5..8d9a41f 100644
--- a/SpriteEd/NSSpriteEdit.cs
+++ b/SpriteEd/NSSpriteEdit.cs
@@ -99,6 +99,11 @@ namespace SpriteEd
                 ClearUndo();
                 NeedsDisplay = true;
             }
+
+            get
+            {
+                return m_sprite;
+            }
         }
 
         /// <summary>
diff --git a/SpriteEd/ViewController.cs b/SpriteEd/ViewController.cs
index 43fdc64..588f9d8 100644
--- a/SpriteEd/ViewController.cs
+++ b/SpriteEd/ViewController.cs
@@ -22,14 +22,22 @@ namespace SpriteEd
 {
     public partial class ViewController : NSViewController
     {
+        private static int m_Untitled = 1;
+
         private SpriteSet m_SpriteSet;
         private NSUrl m_Url;
-        private static int m_Untitled = 1;
 
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        /// <param name="handle">The handle.</param>
         public ViewController(IntPtr handle) : base(handle)
         {
         }
 
+        /// <summary>
+        /// Called when view loaded.
+        /// </summary>
         public override void ViewDidLoad()
         {
             base.ViewDidLoad();
@@ -43,6 +51,9 @@ namespace SpriteEd
             SpriteSet = new SpriteSet(SpriteSet.SetType.C64CharacterSet, 8, 8, palette, false, false, CodePoints.C64);
         }
 
+        /// <summary>
+        /// Called when view appears on screen.  I think.
+        /// </summary>
         public override void ViewDidAppear()
         {
             base.ViewDidAppear();
@@ -63,6 +74,9 @@ namespace SpriteEd
             }
         }
 
+        /// <summary>
+        /// Get/set the represented object.
+        /// </summary>
         public override NSObject RepresentedObject
         {
             get
@@ -76,6 +90,9 @@ namespace SpriteEd
             }
         }
 
+        /// <summary>
+        /// Get/set the SpriteSet being edited.
+        /// </summary>
         public SpriteSet SpriteSet
         {
             get
@@ -99,6 +116,9 @@ namespace SpriteEd
             }
         }
 
+        /// <summary>
+        /// Get/set the file URL associated with the sprite set.
+        /// </summary>
         public NSUrl Url
         {
             get
@@ -114,8 +134,15 @@ namespace SpriteEd
             }
         }
 
+        /// <summary>
+        /// Whether the view is untitled.
+        /// </summary>
         public bool Untitled {get;set;}
 
+        /// <summary>
+        /// Called when the sprite stepper is pressed.
+        /// </summary>
+        /// <param name="sender">The event sender.</param>
         partial void OnSpriteStepper(NSObject sender)
         {
             NSStepper stepper = sender as NSStepper;
@@ -136,6 +163,10 @@ namespace SpriteEd
             }
         }
 
+        /// <summary>
+        /// Called when the colour stepper is pressed.
+        /// </summary>
+        /// <param name="sender">The event sender.</param>
         partial void OnColourStepper(NSObject sender)
         {
             NSStepper stepper = sender as NSStepper;
@@ -152,12 +183,20 @@ namespace SpriteEd
             }
         }
 
+        /// <summary>
+        /// Called when the colour well is interacted with.
+        /// </summary>
+        /// <param name="sender">The event sender.</param>
         partial void OnColourWell(NSObject sender)
         {
             m_SpriteSet.Palette[(uint)m_ColourStepper.IntValue] = Util.ColourNS(m_ColourWell.Color);
             m_SpriteEdit.NeedsDisplay = true;
         }
 
+        /// <summary>
+        /// Called when the drawing mode pop-up button is interacted with.
+        /// </summary>
+        /// <param name="sender">The event sender.</param>
         partial void OnDrawingMode(NSObject sender)
         {
             NSPopUpButton button = sender as NSPopUpButton;
@@ -167,5 +206,50 @@ namespace SpriteEd
                 m_SpriteEdit.Mode = (NSSpriteEdit.DrawingMode)(int)button.SelectedTag;
             }
         }
+
+        /// <summary>
+        /// Called to perform a cut or copy operation on the sprite.
+        /// </summary>
+        /// <param name="cut">True if it's a cut.</param>
+        /// <returns>The sprite data.</returns>
+        public Sprite CutOrCopy(bool cut)
+        {
+            Sprite copy = new Sprite(m_SpriteEdit.Sprite);
+
+            if (cut)
+            {
+                for(uint x = 0; x < m_SpriteEdit.Sprite.Width; x++)
+                {
+                    for(uint y = 0; y < m_SpriteEdit.Sprite.Height; y++)
+                    {
+                        m_SpriteEdit.Sprite[x,y] = 0;
+                    }
+                }
+
+                m_SpriteEdit.NeedsDisplay = true;
+            }
+
+            return copy;
+        }
+
+        /// <summary>
+        /// Called to perform a paste operation on the sprite from the passed sprite.
+        /// </summary>
+        /// <param name="paste">The sprite to paste from.</param>
+        public void Paste(Sprite paste)
+        {
+            uint mw = Math.Min(paste.Width, m_SpriteEdit.Sprite.Width);
+            uint mh = Math.Min(paste.Height, m_SpriteEdit.Sprite.Height);
+
+            for(uint x = 0; x < mw; x++)
+            {
+                for(uint y = 0; y < mh; y++)
+                {
+                    m_SpriteEdit.Sprite[x,y] = paste[x,y];
+                }
+            }
+
+            m_SpriteEdit.NeedsDisplay = true;
+        }
     }
 }
-- 
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