feat: 添加 PathIndex 属性以支持提交路径索引的计算

Author: heartacker

src/Models/Commit.cs

@@ -61,6 +61,8 @@ public static double OpacityForNotMerged
         /// </summary>
         public int Index { get; set; } = 0;
 
+        public int PathIndex { get; set; } = 0;
+
         public int Color { get; set; } = 0;
         public double Opacity => IsMerged ? 1 : OpacityForNotMerged;
         public FontWeight FontWeight => IsCurrentHead ? FontWeight.Bold : FontWeight.Regular;

src/Models/CommitGraph.cs

@@ -149,6 +149,9 @@ public static CommitGraph Parse(List<Commit> commits, bool firstParentOnlyEnable
                     temp.Paths.Add(major.Path);
                 }
 
+                if (major != null)
+                    commit.PathIndex = temp.Paths.IndexOf(major.Path);
+
                 // Calculate link position of this commit.
                 var position = new Point(major?.LastX ?? offsetX, offsetY);
                 var dotColor = major?.Path.Color ?? 0;