Start adding FindVisiblePositions

Redth · Jun 7, 2024 · 65366cc · 65366cc
1 parent 79e5718
commit 65366cc
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Showing 3 changed files with 30 additions and 0 deletions.
diff --git a/VirtualListView/Apple/VirtualListViewHandler.ios.maccatalyst.cs b/VirtualListView/Apple/VirtualListViewHandler.ios.maccatalyst.cs
@@ -255,4 +255,17 @@ public void InvalidateData()
 		});
 
 	}
+
+	public IReadOnlyList<IPositionInfo> FindVisiblePositions()
+	{
+		var positions = new List<PositionInfo>();
+
+		foreach (var cell in PlatformView.VisibleCells)
+		{
+			if (cell is CvCell cvCell)
+				positions.Add(cvCell.PositionInfo);
+		}
+
+		return positions;
+	}
 }
diff --git a/VirtualListView/IVirtualListView.cs b/VirtualListView/IVirtualListView.cs
@@ -49,6 +49,8 @@ public interface IVirtualListView : IView
 	void ClearSelectedItems();
 
 	void ScrollToItem(ItemPosition path, bool animated);
+
+	IReadOnlyList<IPositionInfo> FindVisiblePositions();
 }
 
 public enum ListOrientation

diff --git a/VirtualListView/Platforms/Android/VirtualListViewHandler.android.cs b/VirtualListView/Platforms/Android/VirtualListViewHandler.android.cs
@@ -195,4 +195,19 @@ void UpdateHorizontalScrollbarVisibility(ScrollBarVisibility scrollBarVisibility
 
 		recyclerView.HorizontalScrollBarEnabled = newHorizontalScrollVisiblility == ScrollBarVisibility.Always;
 	}
+
+	public IReadOnlyList<IPositionInfo> FindVisiblePositions()
+	{
+		var positions = new List<IPositionInfo>();
+
+		var firstVisibleItemPosition = layoutManager.FindFirstVisibleItemPosition();
+		var lastVisibleItemPosition = layoutManager.FindLastVisibleItemPosition();
+
+		for (var p = firstVisibleItemPosition; p <= lastVisibleItemPosition; p++)
+		{
+			positions.Add(PositionalViewSelector.GetInfo(p));
+		}
+
+		return positions;
+	}
 }