Added support for only enabling editing modes when the current game configuration supports the features. Currently only applies to 3D Floor Mode, Slope Mode, and Draw Slope Mode. Fixes #463

Build/Configurations/Includes/ZDoom_common.cfg

@@ -230,6 +230,10 @@ mapformat_hexen
 
 	// When this is set to true, sectors with the same tag will light up when a line is highlighted
 	linetagindicatesectors = false;
+	
+	// Enables support for 3D floors (not really, since support for 3D floors is pretty much hard-coded, but
+	// this tells plugins that the game supports 3D floors)
+	effect3dfloorsupport = true;	
 
 	// Special linedefs
 	include("ZDoom_misc.cfg", "speciallinedefs_doomhexen");
@@ -347,6 +351,13 @@ mapformat_udmf
 	// Enables support for individual offsets of upper/middle/lower sidedef textures
 	localsidedeftextureoffsets = true;
 	
+	// Enables support for 3D floors (not really, since support for 3D floors is pretty much hard-coded, but
+	// this tells plugins that the game supports 3D floors)
+	effect3dfloorsupport = true;
+	
+	// Enables support for plane equation slopes
+	planeequationsupport = true;
+	
 	// Default nodebuilder configurations
 	defaultsavecompiler = "zdbsp_udmf_normal";
 	defaulttestcompiler = "zdbsp_udmf_fast";

Source/Core/Config/GameConfiguration.cs

@@ -21,6 +21,8 @@ using System.Collections;
 using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
+using System.Reflection;
+using System.Runtime.CompilerServices;
 using CodeImp.DoomBuilder.IO;
 using CodeImp.DoomBuilder.Map;
 using CodeImp.DoomBuilder.Editing;
@@ -92,7 +94,9 @@ namespace CodeImp.DoomBuilder.Config
 		private readonly string thingclasshelp; //mxd
 		private readonly bool sidedefcompressionignoresaction; //mxd
 		private readonly bool localsidedeftextureoffsets; //MaxW
-		
+		private readonly bool effect3dfloorsupport;
+		private readonly bool planeequationsupport;
+
 		// Skills
 		private readonly List<SkillInfo> skills;
 
@@ -243,6 +247,8 @@ namespace CodeImp.DoomBuilder.Config
 		public bool DOOM { get { return doommapformat; } }
 
 		public bool UseLocalSidedefTextureOffsets { get { return localsidedeftextureoffsets; } } //MaxW
+		public bool Effect3DFloorSupport { get { return effect3dfloorsupport; } }
+		public bool PlaneEquationSupport { get { return planeequationsupport; } }
 
 		// Texture/flat/voxel sources
 		public IDictionary TextureRanges { get { return textureranges; } }
@@ -409,7 +415,9 @@ namespace CodeImp.DoomBuilder.Config
 			sidedefcompressionignoresaction = cfg.ReadSetting("sidedefcompressionignoresaction", false); //mxd
 			defaultlinedefactivation = cfg.ReadSetting("defaultlinedefactivation", ""); //mxd
 			localsidedeftextureoffsets = (cfg.ReadSetting("localsidedeftextureoffsets", false)); //MaxW
-			for(int i = 0; i < Linedef.NUM_ARGS; i++) makedoorargs[i] = cfg.ReadSetting("makedoorarg" + i.ToString(CultureInfo.InvariantCulture), 0);
+			effect3dfloorsupport = cfg.ReadSetting("effect3dfloorsupport", false);
+			planeequationsupport = cfg.ReadSetting("planeequationsupport", false);
+			for (int i = 0; i < Linedef.NUM_ARGS; i++) makedoorargs[i] = cfg.ReadSetting("makedoorarg" + i.ToString(CultureInfo.InvariantCulture), 0);
 
 			//mxd. Update map format flags
 			universalmapformat = (formatinterface == "UniversalMapSetIO");
@@ -1235,6 +1243,37 @@ namespace CodeImp.DoomBuilder.Config
 		{
 			return maplumps.Values.Count(o => o.ScriptBuild || o.Script != null) > 0;
 		}
+
+		/// <summary>
+		/// Checks if this game configuration supports the requested map feature(s)
+		/// </summary>
+		/// <param name="features">Array of strings of property names of the GameConfiguration class</param>
+		/// <returns></returns>
+		public bool SupportsMapFeatures(string[] features, [CallerMemberName] string callername = "")
+		{
+			bool supported = true;
+
+			foreach (string rmf in features)
+			{
+				PropertyInfo pi = GetType().GetProperty(rmf);
+
+				if (pi == null)
+				{
+					General.ErrorLogger.Add(ErrorType.Error, "Check for supported map features (" + string.Join(", ", features) + ") was requested my " + callername + ", but property \"" + rmf + "\" does not exist.");
+					return false;
+				}
+
+				object value = pi.GetValue(this);
+
+				if (value is bool && (bool)value == false)
+				{
+					supported = false;
+					break;
+				}
+			}
+
+			return supported;
+		}
 		
 		#endregion
 	}

Source/Core/Editing/EditModeAttribute.cs

@@ -43,6 +43,7 @@ namespace CodeImp.DoomBuilder.Editing
 		private bool usebydefault;
 		private bool safestartmode;
 		private string[] supportedmapformats; //mxd
+		private string[] requiredmapfeatures;
 		private bool isdeprecated = false;
 		private string deprecationmessage = string.Empty;
 		
@@ -117,6 +118,11 @@ namespace CodeImp.DoomBuilder.Editing
 		/// </summary>
 		public string[] SupportedMapFormats { get { return supportedmapformats; } set { supportedmapformats = value; } }
 
+		/// <summary>
+		/// List of required map features to make the mode usable. Uses strings of GameConfiguration class properties
+		/// </summary>
+		public string[] RequiredMapFeatures { get { return requiredmapfeatures; } set { requiredmapfeatures = value; } }
+
 		/// <summary>
 		/// When set to true the DeprecationMessage will be shown as a warning in the errors and warnings dialog
 		/// </summary>

Source/Core/Editing/EditingManager.cs

@@ -248,9 +248,10 @@ namespace CodeImp.DoomBuilder.Editing
 			{
 				foreach(EditModeInfo emi in allmodes)
 				{
-					// Include the mode if it supports current map format (mxd)
+					// Include the mode if it supports current map format (mxd) and map features
 					// Also include the mode when it is listed and enabled or when it's not optional
 					if( (emi.Attributes.SupportedMapFormats == null || Array.IndexOf(emi.Attributes.SupportedMapFormats, General.Map.Config.FormatInterface) != -1) &&
+						(emi.Attributes.RequiredMapFeatures == null || General.Map.Config.SupportsMapFeatures(emi.Attributes.RequiredMapFeatures)) &&
 						((General.Map.ConfigSettings.EditModes.ContainsKey(emi.Type.FullName) && 
 						General.Map.ConfigSettings.EditModes[emi.Type.FullName] ) 
 						 || !emi.IsOptional) )

Source/Core/Windows/ConfigForm.cs

@@ -20,6 +20,7 @@ using System;
 using System.Collections.Generic;
 using System.Drawing;
 using System.IO;
+using System.Reflection;
 using System.Windows.Forms;
 using CodeImp.DoomBuilder.Config;
 using CodeImp.DoomBuilder.Data;
@@ -196,15 +197,24 @@ namespace CodeImp.DoomBuilder.Windows
 					EditModeInfo emi = (lvi.Tag as EditModeInfo);
 
 					//mxd. Disable item if the mode does not support current map format
-					if(emi.Attributes.SupportedMapFormats != null &&
-					    Array.IndexOf(emi.Attributes.SupportedMapFormats, gameconfig.FormatInterface) == -1) 
+					if (emi.Attributes.SupportedMapFormats != null &&
+						Array.IndexOf(emi.Attributes.SupportedMapFormats, gameconfig.FormatInterface) == -1)
 					{
 						lvi.Text = emi.Attributes.DisplayName + " (map format not supported" + (emi.Attributes.IsDeprecated ? ", deprecated" : "") + ")";
 						lvi.ForeColor = SystemColors.GrayText;
 						lvi.BackColor = SystemColors.InactiveBorder;
 						lvi.Checked = false;
-					} 
-					else 
+
+						continue;
+					}
+					else if (emi.Attributes.RequiredMapFeatures != null && !gameconfig.SupportsMapFeatures(emi.Attributes.RequiredMapFeatures))
+					{
+						lvi.Text = emi.Attributes.DisplayName + " (map feature not supported)";
+						lvi.ForeColor = SystemColors.GrayText;
+						lvi.BackColor = SystemColors.InactiveBorder;
+						lvi.Checked = false;
+					}
+					else
 					{
 						lvi.Text = emi.Attributes.DisplayName + (emi.Attributes.IsDeprecated ? " (deprecated)" : "");
 						lvi.ForeColor = SystemColors.WindowText;

Source/Plugins/3DFloorMode/DrawSlopesMode.cs

@@ -48,6 +48,7 @@ namespace CodeImp.DoomBuilder.ThreeDFloorMode
 			  ButtonGroup = "000_editing",
 			  AllowCopyPaste = false,
 			  SupportedMapFormats = new[] { "UniversalMapSetIO" },
+			  RequiredMapFeatures = new[] { "PlaneEquationSupport" },
 			  Volatile = true,
 			  UseByDefault = true,
 			  Optional = false,

Source/Plugins/3DFloorMode/SlopeMode.cs

@@ -62,7 +62,8 @@ namespace CodeImp.DoomBuilder.ThreeDFloorMode
               ButtonOrder = int.MinValue + 501,	// Position of the button (lower is more to the left)
               ButtonGroup = "000_editing",
 			  SupportedMapFormats = new[] { "UniversalMapSetIO" },
-              UseByDefault = true,
+			  RequiredMapFeatures = new[] { "PlaneEquationSupport" },
+			  UseByDefault = true,
               SafeStartMode = true,
               IsDeprecated = true,
               DeprecationMessage = "Please use the visual sloping functionality instead.")]

Source/Plugins/3DFloorMode/ThreeDFloorMode.cs

@@ -53,6 +53,7 @@ namespace CodeImp.DoomBuilder.ThreeDFloorMode
 			  ButtonOrder = int.MinValue + 501,	// Position of the button (lower is more to the left)
 			  ButtonGroup = "000_editing",
 			  SupportedMapFormats = new[] { "HexenMapSetIO", "UniversalMapSetIO" },
+			  RequiredMapFeatures = new[] { "Effect3DFloorSupport" },
 			  UseByDefault = true,
 			  SafeStartMode = false,
 			  Volatile = false)]