From 4f2a8a15cae2711a098e90eed399e72bde2d880c Mon Sep 17 00:00:00 2001
From: sphere <spherallic@gmail.com>
Date: Wed, 10 Nov 2021 01:26:41 +0100
Subject: [PATCH] Visual Mode: first attempt at handling multitags

---
 .../VisualModes/BaseVisualMode.cs             | 107 ++++++++++++++++--
 1 file changed, 100 insertions(+), 7 deletions(-)

diff --git a/Source/Plugins/BuilderModes/VisualModes/BaseVisualMode.cs b/Source/Plugins/BuilderModes/VisualModes/BaseVisualMode.cs
index 11f03a8..99156b7 100644
--- a/Source/Plugins/BuilderModes/VisualModes/BaseVisualMode.cs
+++ b/Source/Plugins/BuilderModes/VisualModes/BaseVisualMode.cs
@@ -996,7 +996,76 @@ namespace CodeImp.DoomBuilder.BuilderModes
                 }
 
                 if (General.Map.SRB2)
-                {
+				{
+					//sphere: Multi-tagging
+					if (l.Action == 96)
+					{
+						int[] tags = new int[5];
+
+						tags[0] = l.Tag;
+						if (l.IsFlagSet("8192"))
+						{
+							tags[1] = l.Front.OffsetX;
+							tags[2] = l.Front.OffsetY;
+						}
+						if (l.IsFlagSet("32768") && l.Back != null)
+						{
+							tags[3] = l.Back.OffsetX;
+							tags[4] = l.Back.OffsetY;
+						}
+
+						if (!sectortags.ContainsKey(l.Front.Sector.Tag)) sectortags[l.Front.Sector.Tag] = new List<Sector>();
+
+						if (l.IsFlagSet("1024"))
+						{
+							for (int i = 0; i <= 4; i++)
+							{
+								if (tags[i] == 0 || !sectortags.ContainsKey(tags[i])) continue;
+
+								foreach (Sector s in sectortags[tags[i]])
+									sectortags[l.Front.Sector.Tag].Add(s);
+							}
+						}
+						else
+						{
+							foreach (Sector s in sectortags[l.Tag])
+							{
+								sectortags[l.Front.Sector.Tag].Add(s);
+								for (int i = 1; i <= 4; i++) // only iterate over offset/extra tags
+								{
+									if (tags[i] != 0) continue;
+									if (!sectortags.ContainsKey(tags[i])) sectortags[tags[i]] = new List<Sector>();
+									sectortags[tags[i]].Add(s);
+								}
+							}
+						}
+					}
+
+					if (l.Action == 97 || l.Action == 98 || l.Action == 99)
+					{
+						int[] tags = new int[5];
+
+						tags[0] = l.Tag;
+						if (l.IsFlagSet("8192"))
+						{
+							tags[1] = l.Front.OffsetX;
+							tags[2] = l.Front.OffsetY;
+						}
+						if (l.IsFlagSet("32768") && l.Back != null)
+						{
+							tags[3] = l.Back.OffsetX;
+							tags[4] = l.Back.OffsetY;
+						}
+
+						foreach (int tag in tags)
+						{
+							if (tag == 0) continue;
+							if (!sectortags.ContainsKey(tag)) sectortags[tag] = new List<Sector>();
+							if (l.Action == 97 || l.Action == 99) sectortags[tag].Add(l.Front.Sector);
+							if (l.Action == 98 || l.Action == 99) sectortags[tag].Add(l.Back.Sector);
+						}
+					}
+
 					//MascaraSnake: Flat alignment
 					//With flat offset/rotation fixes by Justburner
 					if (l.IsFlatAlignment)
@@ -1029,9 +1098,9 @@ namespace CodeImp.DoomBuilder.BuilderModes
 								ApplyFlatAlignment(l, s, alignfloor, alignceiling, offset, rotation);
 						}
 					}
-					
-                    //MascaraSnake: Colormap
-                    if (l.IsColormap && l.Front != null && General.Settings.ShowColormaps)
+
+					//MascaraSnake: Colormap
+					if (l.IsColormap && l.Front != null && General.Settings.ShowColormaps)
                     {
                         int sectortag = l.Tag;
                         int color;
@@ -3829,7 +3898,6 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			RebuildElementData();
 			UpdateChangedObjects();
 			General.Interface.DisplayStatus(StatusType.Action, "Reset actions and tags for " + selection.Count + (selection.Count == 1 ? " surface." : " surfaces."));
-			ClearSelection();
 			ShowTargetInfo();
 		}
 
@@ -3873,7 +3941,6 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			//update changed geometry
 			RebuildElementData();
 			UpdateChangedObjects();
-			ClearSelection();
 			ShowTargetInfo();
 			General.Interface.DisplayStatus(StatusType.Action, "Reset flags for " +
 				selection.Count + (selection.Count == 1 ? " surface and " : " surfaces and ") +
@@ -4215,7 +4282,6 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			{
 				RebuildElementData();
 				UpdateChangedObjects();
-				ClearSelection();
 				ShowTargetInfo();
 			}
 
@@ -4245,6 +4311,13 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		{
 			int counter = 0;
 			List<IVisualEventReceiver> selected = GetSelectedObjects(true, true, true, true);
+
+			if (selected.Count == 0)
+			{
+				General.Interface.DisplayStatus(StatusType.Warning, "Selecting single-sided lines only requires selected surfaces!");
+				return;
+			}
+
 			foreach (IVisualEventReceiver i in selected)
 				if (i is BaseVisualGeometrySidedef)
 				{
@@ -4269,6 +4342,13 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		{
 			int counter = 0;
 			List<IVisualEventReceiver> selected = GetSelectedObjects(true, true, true, true);
+
+			if (selected.Count == 0)
+			{
+				General.Interface.DisplayStatus(StatusType.Warning, "Selecting double-sided lines only requires selected surfaces!");
+				return;
+			}
+
 			foreach (IVisualEventReceiver i in selected)
 				if (i is BaseVisualGeometrySidedef)
 				{
@@ -4292,6 +4372,12 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		{
 			int counter = 0;
 			List<IVisualEventReceiver> selected = GetSelectedObjects(true, true, true, true);
+
+			if (selected.Count == 0)
+			{
+				General.Interface.DisplayStatus(StatusType.Warning, "Selecting floors only requires selected surfaces!");
+				return;
+			}
 			foreach (IVisualEventReceiver i in selected)
 				if (i is VisualFloor)
 					counter++;
@@ -4312,6 +4398,13 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		{
 			int counter = 0;
 			List<IVisualEventReceiver> selected = GetSelectedObjects(true, true, true, true);
+
+			if (selected.Count == 0)
+			{
+				General.Interface.DisplayStatus(StatusType.Warning, "Selecting ceilings only requires selected surfaces!");
+				return;
+			}
+
 			foreach (IVisualEventReceiver i in selected)
 				if (i is VisualCeiling)
 					counter++;