Show Step buttons/menu items based on whether it is implemented in the current core

BizHawk.Client.EmuHawk/tools/Debugger/GenericDebugger.IToolForm.cs

@@ -10,7 +10,7 @@ namespace BizHawk.Client.EmuHawk
 	public partial class GenericDebugger : IToolForm
 	{
 		[RequiredService]
-		private IDebuggable Core { get; set; }
+		private IDebuggable Debuggable { get; set; }
 		[OptionalService]
 		private IDisassemblable Disassembler { get; set; }
 		[OptionalService]
@@ -23,7 +23,7 @@ namespace BizHawk.Client.EmuHawk
 		private int PC
 		{
 			// TODO: is this okay for N64?
-			get { return (int)Core.GetCpuFlagsAndRegisters()[Disassembler.PCRegisterName].Value; }
+			get { return (int)Debuggable.GetCpuFlagsAndRegisters()[Disassembler.PCRegisterName].Value; }
 		}
 
 		#region Implementation checking
@@ -66,6 +66,51 @@ namespace BizHawk.Client.EmuHawk
 			}
 		}
 
+		private bool CanStepInto
+		{
+			get
+			{
+				try
+				{
+					return Debuggable.CanStep(StepType.Into);
+				}
+				catch (NotImplementedException)
+				{
+					return false;
+				}
+			}
+		}
+
+		private bool CanStepOver
+		{
+			get
+			{
+				try
+				{
+					return Debuggable.CanStep(StepType.Over);
+				}
+				catch (NotImplementedException)
+				{
+					return false;
+				}
+			}
+		}
+
+		private bool CanStepOut
+		{
+			get
+			{
+				try
+				{
+					return Debuggable.CanStep(StepType.Out);
+				}
+				catch (NotImplementedException)
+				{
+					return false;
+				}
+			}
+		}
+
 		#endregion
 
 		public void UpdateValues()

BizHawk.Client.EmuHawk/tools/Debugger/GenericDebugger.cs

@@ -132,22 +132,26 @@ namespace BizHawk.Client.EmuHawk
 				});
 			}
 
-			RegisterPanel.Core = Core;
+			RegisterPanel.Core = Debuggable;
 			RegisterPanel.ParentDebugger = this;
 			RegisterPanel.GenerateUI();
 
-			BreakPointControl1.Core = Core;
+			BreakPointControl1.Core = Debuggable;
 			BreakPointControl1.MCS = MCS;
 			BreakPointControl1.ParentDebugger = this;
 			BreakPointControl1.GenerateUI();
+
+			StepIntoMenuItem.Enabled = StepIntoBtn.Enabled = CanStepInto;
+			StepOutMenuItem.Enabled = StepOutBtn.Enabled = CanStepOut;
+			StepOverMenuItem.Enabled = StepOverBtn.Enabled = CanStepOver;
 		}
 
 		private void DisengageDebugger()
 		{
 			SaveConfigSettings();
-			if (Core.Tracer != null)
+			if (Debuggable.Tracer != null)
 			{
-				Core.Tracer.Enabled = false;
+				Debuggable.Tracer.Enabled = false;
 			}
 
 			BreakPointControl1.Shutdown();