[server] Handle viewport updates sent by clients

Nibriboard/Client/Messages/ViewportUpdateMessage.cs

@@ -0,0 +1,21 @@
+using System;
+using SBRL.Utilities;
+
+namespace Nibriboard.Client.Messages
+{
+	/// <summary>
+	/// Represents an update from the client on the new size of their viewport.
+	/// </summary>
+	public class ViewportUpdateMessage : Message
+	{
+		/// <summary>
+		/// The new dimensions of the client's viewport.
+		/// </summary>
+		public Rectangle NewViewport { get; set; }
+
+		public ViewportUpdateMessage()
+		{
+			
+		}
+	}
+}

Nibriboard/Client/NibriClient.cs

@@ -57,7 +57,8 @@ namespace Nibriboard.Client
 			["ChunkUpdateRequest"] = typeof(ChunkUpdateRequestMessage),
 			["LineStart"] = typeof(LineStartMessage),
 			["LinePart"] = typeof(LinePartMessage),
-			["LineComplete"] = typeof(LineCompleteMessage)
+			["LineComplete"] = typeof(LineCompleteMessage),
+			["ViewportUpdate"] = typeof(ViewportUpdateMessage)
 		};
 
 		/// <summary>
@@ -386,6 +387,16 @@ namespace Nibriboard.Client
 			return Task.CompletedTask;
 		}
 
+		/// <summary>
+		/// Handles viewport updates from the remote client.
+		/// </summary>
+		/// <param name="message">The viewport update message to handle.</param>
+		protected Task handleViewportUpdateMessage(ViewportUpdateMessage message) {
+			CurrentViewPort = message.NewViewport;
+
+			return Task.CompletedTask;
+		}
+
 		/// <summary>
 		/// Handles line start events from the client.
 		/// These messages are currently only required to let other clients know about

Nibriboard/Nibriboard.csproj

@@ -110,6 +110,7 @@
     <Compile Include="Utilities\CalcPaths.cs" />
     <Compile Include="RippleSpace\PlaneInfo.cs" />
     <Compile Include="Utilities\BinaryIO.cs" />
+    <Compile Include="Client\Messages\ViewportUpdateMessage.cs" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="ClientFiles\index.html" />