prepared for more plugin features

Source/Builder.csproj

@@ -315,6 +315,7 @@
     <Compile Include="Map\SidedefPart.cs" />
     <Compile Include="Map\Thing.cs" />
     <Compile Include="Map\Vertex.cs" />
+    <Compile Include="Plugins\Plug.cs" />
     <Compile Include="Plugins\Plugin.cs" />
     <Compile Include="Plugins\PluginManager.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />

Source/BuilderModes/BuilderModes.csproj

@@ -37,9 +37,10 @@
     <Compile Include="ClassicModes\DragSectorsMode.cs" />
     <Compile Include="ClassicModes\DragGeometryMode.cs" />
     <Compile Include="ClassicModes\DrawGeometryMode.cs" />
+    <Compile Include="General\BuilderPlug.cs" />
     <Compile Include="Testing\TriangulatorMode.cs" />
     <Compile Include="ClassicModes\DragThingsMode.cs" />
-    <Compile Include="Tools\LineLengthLabel.cs" />
+    <Compile Include="General\LineLengthLabel.cs" />
     <Compile Include="VisualModes\BaseVisualMode.cs" />
     <Compile Include="VisualModes\BaseVisualSector.cs" />
     <Compile Include="ClassicModes\DragVerticesMode.cs" />

Source/BuilderModes/Tools/LineLengthLabel.cs

@@ -1,123 +0,0 @@
-
-#region ================== Copyright (c) 2007 Pascal vd Heiden
-
-/*
- * Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
- * This program is released under GNU General Public License
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- */
-
-#endregion
-
-#region ================== Namespaces
-
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.Globalization;
-using System.Text;
-using System.Windows.Forms;
-using System.IO;
-using System.Reflection;
-using CodeImp.DoomBuilder.Interface;
-using CodeImp.DoomBuilder.IO;
-using CodeImp.DoomBuilder.Map;
-using CodeImp.DoomBuilder.Rendering;
-using CodeImp.DoomBuilder.Geometry;
-using System.Drawing;
-using CodeImp.DoomBuilder.Editing;
-
-#endregion
-
-namespace CodeImp.DoomBuilder.BuilderModes
-{
-	public class LineLengthLabel : IDisposable
-	{
-		#region ================== Constants
-
-		private const int TEXT_CAPACITY = 10;
-		private const float TEXT_SCALE = 14f;
-		private const string VALUE_FORMAT = "0";
-
-		#endregion
-
-		#region ================== Variables
-
-		private TextLabel label;
-		private Vector2D start;
-		private Vector2D end;
-		
-		#endregion
-
-		#region ================== Properties
-
-		public TextLabel TextLabel { get { return label; } }
-		public Vector2D Start { get { return start; } set { start = value; Update(); } }
-		public Vector2D End { get { return end; } set { end = value; Update(); } }
-
-		#endregion
-
-		#region ================== Constructor / Disposer
-
-		// Constructor
-		public LineLengthLabel()
-		{
-			// Initialize
-			Initialize();
-		}
-
-		// Constructor
-		public LineLengthLabel(Vector2D start, Vector2D end)
-		{
-			// Initialize
-			Initialize();
-			Move(start, end);
-		}
-
-		// Initialization
-		private void Initialize()
-		{
-			label = new TextLabel(TEXT_CAPACITY);
-			label.AlignX = TextAlignmentX.Center;
-			label.AlignY = TextAlignmentY.Middle;
-			label.Color = General.Colors.Highlight;
-			label.Backcolor = General.Colors.Background;
-			label.Scale = TEXT_SCALE;
-			label.TransformCoords = true;
-		}
-		
-		// Disposer
-		public void Dispose()
-		{
-			label.Dispose();
-		}
-
-		#endregion
-		
-		#region ================== Methods
-
-		// This updates the text
-		private void Update()
-		{
-			Vector2D delta = end - start;
-			float length = delta.GetLength();
-			label.Text = length.ToString(VALUE_FORMAT);
-			label.Rectangle = new RectangleF(start.x + delta.x * 0.5f, start.y + delta.y * 0.5f, 0f, 0f);
-		}
-
-		// This moves the label
-		public void Move(Vector2D start, Vector2D end)
-		{
-			this.start = start;
-			this.end = end;
-			Update();
-		}
-		
-		#endregion
-	}
-}

Source/Editing/EditModeInfo.cs

@@ -91,7 +91,7 @@ namespace CodeImp.DoomBuilder.Editing
 			// Make button info
 			if((attr.ButtonImage != null) && (attr.ButtonDesc != null))
 			{
-				buttonimagestream = plugin.FindResource(attr.ButtonImage);
+				buttonimagestream = plugin.GetResourceStream(attr.ButtonImage);
 				if(buttonimagestream != null)
 				{
 					buttonimage = Image.FromStream(buttonimagestream);

Source/Plugins/Plug.cs

@@ -0,0 +1,106 @@
+#region ================== Namespaces
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Text;
+using System.IO;
+
+#endregion
+
+namespace CodeImp.DoomBuilder.Plugins
+{
+	/// <summary>
+	/// This is the key link between the Doom Builder core and the plugin.
+	/// Every plugin must expose a single class that inherits this class.
+	/// </summary>
+	public class Plug : IDisposable
+	{
+		#region ================== Constants
+
+		#endregion
+
+		#region ================== Variables
+
+		// Internals
+		private Plugin plugin;
+		
+		// Disposing
+		private bool isdisposed = false;
+
+		#endregion
+
+		#region ================== Properties
+
+		// Internals
+		internal Plugin Plugin { get { return plugin; } set { plugin = value; } }
+		
+		/// <summary>
+		/// Indicates if the plugin has been disposed.
+		/// </summary>
+		public bool IsDisposed { get { return isdisposed; } }
+
+		#endregion
+
+		#region ================== Constructor / Disposer
+
+		/// <summary>
+		/// This is the key link between the Doom Builder core and the plugin.
+		/// Every plugin must expose a single class that inherits this class.
+		/// <para>
+		/// NOTE: Some methods cannot be used in this constructor, because the plugin
+		/// is not yet fully initialized. Instead, use the Initialize method to do
+		/// your initializations.
+		/// </para>
+		/// </summary>
+		public Plug()
+		{
+			// Initialize
+
+			// We have no destructor
+			GC.SuppressFinalize(this);
+		}
+
+		/// <summary>
+		/// This is called by the Doom Builder core when the plugin is being disposed.
+		/// </summary>
+		public virtual void Dispose()
+		{
+			// Not already disposed?
+			if(!isdisposed)
+			{
+				// Clean up
+				plugin = null;
+				
+				// Done
+				isdisposed = true;
+			}
+		}
+
+		#endregion
+
+		#region ================== Methods
+
+		/// <summary>
+		/// This is called after the constructor to allow a plugin to initialize.
+		/// </summary>
+		public virtual void Initialize()
+		{
+		}
+
+		/// <summary>
+		/// This finds the embedded resource with the specified name in the plugin and creates
+		/// a Stream from it. Returns null when the embedded resource cannot be found.
+		/// </summary>
+		/// <param name="resourcename">Name of the resource in the plugin.</param>
+		/// <returns>Returns a Stream of the embedded resource,
+		/// or null when the resource cannot be found.</returns>
+		public Stream GetResourceStream(string resourcename)
+		{
+			return plugin.GetResourceStream(resourcename);
+		}
+		
+		#endregion
+	}
+}

Source/Plugins/Plugin.cs

@@ -29,7 +29,7 @@ using CodeImp.DoomBuilder.Controls;
 
 namespace CodeImp.DoomBuilder.Plugins
 {
-	internal class Plugin
+	internal class Plugin : IDisposable
 	{
 		#region ================== Constants
 
@@ -40,6 +40,9 @@ namespace CodeImp.DoomBuilder.Plugins
 		// The plugin assembly
 		private Assembly asm;
 		
+		// The plug
+		private Plug plug;
+		
 		// Unique name used to refer to this assembly
 		private string name;
 		
@@ -51,6 +54,7 @@ namespace CodeImp.DoomBuilder.Plugins
 		#region ================== Properties
 
 		public Assembly Assembly { get { return asm; } }
+		public Plug Plug { get { return plug; } }
 		public string Name { get { return name; } }
 		public bool IsDisposed { get { return isdisposed; } }
 
@@ -68,6 +72,29 @@ namespace CodeImp.DoomBuilder.Plugins
 			// Load assembly
 			asm = Assembly.LoadFile(filename);
 
+			// Find the class that inherits from Plugin
+			Type t = FindSingleClass(typeof(Plug));
+			if(t != null)
+			{
+				// Are the multiple plug classes?
+				if(FindClasses(typeof(Plug)).Length > 1)
+				{
+					// Show a warning
+					General.WriteLogLine("WARNING: Plugin '" + name + "' has more than one plug!");
+				}
+				
+				// Make plug instance
+				plug = CreateObject<Plug>(t);
+				plug.Plugin = this;
+				plug.Initialize();
+			}
+			else
+			{
+				// How can we plug something in without a plug?
+				General.WriteLogLine("ERROR: Could not load plugin '" + name + "', plugin is missing the plug!");
+				throw new Exception();
+			}
+			
 			// Load actions
 			General.Actions.LoadActions(asm);
 			
@@ -94,7 +121,7 @@ namespace CodeImp.DoomBuilder.Plugins
 		#region ================== Methods
 
 		// This creates a stream to read a resource or returns null when not found
-		public Stream FindResource(string resourcename)
+		public Stream GetResourceStream(string resourcename)
 		{
 			string[] resnames;
 			

Source/Plugins/PluginManager.cs

@@ -76,8 +76,21 @@ namespace CodeImp.DoomBuilder.Plugins
 			{
 				// Load plugin from this file
 				General.MainWindow.DisplayStatus("Loading plugin '" + Path.GetFileName(fn) + "'...");
+				try
+				{
 					p = new Plugin(fn);
-				if(!p.IsDisposed) this.plugins.Add(p);
+				}
+				catch(Exception)
+				{
+					General.WriteLogLine("WARNING: Plugin file '" + Path.GetFileName(fn) + "' was not loaded.");
+					p = null;
+				}
+
+				// Continue if no errors
+				if((p != null) && (!p.IsDisposed))
+				{
+					// Add to plugins
+					this.plugins.Add(p);
 
 					// For all classes that inherit from EditMode
 					editclasses = p.FindClasses(typeof(EditMode));
@@ -93,6 +106,7 @@ namespace CodeImp.DoomBuilder.Plugins
 						}
 					}
 				}
+			}
 
 			// Sort the list in order for buttons
 			editmodes.Sort();