Reveal file in the middle of Project Navigator

CodeEdit/Features/NavigatorSidebar/ProjectNavigator/OutlineView/ProjectNavigatorViewController.swift

@@ -86,6 +86,10 @@ final class ProjectNavigatorViewController: NSViewController {
         fatalError()
     }
 
+    @objc func revealFile(_ sender: Any) {
+        updateSelection(itemID: workspace?.tabManager.activeTabGroup.selected?.id)
+    }
+
     /// Updates the selection of the ``outlineView`` whenever it changes.
     ///
     /// Most importantly when the `id` changes from an external view.
@@ -290,6 +294,10 @@ extension ProjectNavigatorViewController: NSOutlineViewDelegate {
         else {
             return
         }
+        /// update outline selection only if the parent of selected item match with expanded item
+        guard item.parent === notification.userInfo?["NSObject"] as? CEWorkspaceFile else {
+            return
+        }
         /// select active file under collapsed folder only if its parent is expanding
         if outlineView.isItemExpanded(item.parent) {
             updateSelection(itemID: item.id)
@@ -350,7 +358,21 @@ extension ProjectNavigatorViewController: NSOutlineViewDelegate {
             alert.runModal()
             return
         } else {
+            let visibleRect = scrollView.contentView.visibleRect
+            let visibleRows = outlineView.rows(in: visibleRect)
+            guard !visibleRows.contains(row) else {
+                /// in case that the selected file is not fully visible (some parts are out of the visible rect),
+                /// `scrollRowToVisible(_:)` method brings the file where it can be fully visible.
+                outlineView.scrollRowToVisible(row)
+                return
+            }
+            let rowRect = outlineView.rect(ofRow: row)
+            let centerY = rowRect.midY - (visibleRect.height / 2)
+            let center = NSPoint(x: 0, y: centerY)
+            /// `scroll(_:)` method alone doesn't bring the selected file to the center in some cases.
+            /// calling `scrollRowToVisible(_:)` method before it makes the file reveal in the center more correctly.
             outlineView.scrollRowToVisible(row)
+            outlineView.scroll(center)
         }
     }
 

CodeEdit/Features/WindowCommands/NavigateCommands.swift

@@ -12,7 +12,7 @@ struct NavigateCommands: Commands {
         CommandMenu("Navigate") {
             Group {
                 Button("Reveal in Project Navigator") {
-
+                    NSApp.sendAction(#selector(ProjectNavigatorViewController.revealFile(_:)), to: nil, from: nil)
                 }
                 .keyboardShortcut("j", modifiers: [.shift, .command])