Beginnings of cursor support.

OpenRa.Game/Graphics/CursorSequence.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Xml;
+
+namespace OpenRa.Game.Graphics
+{
+	class CursorSequence
+	{
+		readonly int start, length;
+
+		public int Start { get { return start; } }
+		public int End { get { return start + length; } }
+		public int Length { get { return length; } }
+
+		Sprite[] sprites;
+		public CursorSequence(string cursorSrc, XmlElement e)
+		{
+			sprites = CursorSheetBuilder.LoadAllSprites(cursorSrc, ".shp");
+			
+			start = int.Parse(e.GetAttribute("start"));
+
+			if (e.GetAttribute("length") == "*" || e.GetAttribute("end") == "*")
+				length = sprites.Length - start;
+			else if (e.HasAttribute("length"))
+				length = int.Parse(e.GetAttribute("length"));
+			else if (e.HasAttribute("end"))
+				length = int.Parse(e.GetAttribute("end")) - start;
+			else
+				length = 1;
+		}
+
+		public Sprite GetSprite(int frame)
+		{
+			return sprites[(frame % length) + start];
+		}
+	}
+}

OpenRa.Game/Graphics/SequenceProvider.cs

@@ -9,6 +9,8 @@ namespace OpenRa.Game.Graphics
 		static Dictionary<string, Dictionary<string, Sequence>> units =
 			new Dictionary<string, Dictionary<string, Sequence>>();
 
+		static Dictionary<string, CursorSequence> cursors = new Dictionary<string, CursorSequence>();
+
 		static SequenceProvider()
 		{
 			XmlDocument document = new XmlDocument();
@@ -16,6 +18,17 @@ namespace OpenRa.Game.Graphics
 
 			foreach (XmlElement eUnit in document.SelectNodes("/sequences/unit"))
 				LoadSequencesForUnit(eUnit);
+
+			foreach (XmlElement eCursor in document.SelectNodes("/sequences/cursor"))
+				LoadSequencesForCursor(eCursor);
+		}
+
+		static void LoadSequencesForCursor(XmlElement eCursor)
+		{
+			string cursorSrc = eCursor.GetAttribute("src");
+
+			foreach (XmlElement eSequence in eCursor.SelectNodes("./sequence"))
+				cursors.Add(eSequence.GetAttribute("name"), new CursorSequence(cursorSrc, eSequence));
 		}
 
 		public static void ForcePrecache() { }	// force static ctor to run
@@ -35,5 +48,10 @@ namespace OpenRa.Game.Graphics
 		{
 			return units[unitName][sequenceName];
 		}
+
+		public static CursorSequence GetCursorSequence(string cursor)
+		{
+			return cursors[cursor];
+		}
 	}
 }