From 8fc7445a7a68dbc869d957bba6a5c75bf477f619 Mon Sep 17 00:00:00 2001
From: Brent Simmons <brent@ranchero.com>
Date: Sun, 19 Nov 2017 21:01:16 -0800
Subject: [PATCH] Disallow selecting group items. Fix #193.

---
 .../Sidebar/SidebarViewController.swift           | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Evergreen/MainWindow/Sidebar/SidebarViewController.swift b/Evergreen/MainWindow/Sidebar/SidebarViewController.swift
index e22cfae7a..38a7c3ec3 100644
--- a/Evergreen/MainWindow/Sidebar/SidebarViewController.swift
+++ b/Evergreen/MainWindow/Sidebar/SidebarViewController.swift
@@ -151,6 +151,21 @@ import RSCore
 		return node.isGroupItem
 	}
 
+	func outlineView(_ outlineView: NSOutlineView, selectionIndexesForProposedSelection proposedSelectionIndexes: IndexSet) -> IndexSet {
+
+		// Don’t allow selecting group items.
+		// If any index in IndexSet contains a group item,
+		// return the current selection (not a modified version of the proposed selection).
+
+		for index in proposedSelectionIndexes {
+			if let node = nodeForRow(index), node.isGroupItem {
+				return outlineView.selectedRowIndexes
+			}
+		}
+
+		return proposedSelectionIndexes
+	}
+
     func outlineViewSelectionDidChange(_ notification: Notification) {
 
 		// TODO: support multiple selection