Ensure file view length is never returned as -1

This was causing issues when obtaining selected items

2 files changed, 7 insertions, 1 deletions

diff --git a/pkg/gui/filetree/file_tree.go b/pkg/gui/filetree/file_tree.go
index 9d3bb580d..b80499cfd 100644
--- a/pkg/gui/filetree/file_tree.go
+++ b/pkg/gui/filetree/file_tree.go
@@ -5,6 +5,7 @@ import (
 
 	"github.com/jesseduffield/lazygit/pkg/commands/models"
 	"github.com/jesseduffield/lazygit/pkg/gui/types"
+	"github.com/jesseduffield/lazygit/pkg/utils"
 	"github.com/samber/lo"
 	"github.com/sirupsen/logrus"
 )
@@ -138,7 +139,8 @@ func (self *FileTree) GetAllItems() []*FileNode {
 }
 
 func (self *FileTree) Len() int {
-	return self.tree.Size(self.collapsedPaths) - 1 // ignoring root
+	// -1 because we're ignoring the root
+	return utils.Max(self.tree.Size(self.collapsedPaths)-1, 0)
 }
 
 func (self *FileTree) GetItem(index int) types.HasUrn {
diff --git a/pkg/gui/filetree/file_tree_view_model.go b/pkg/gui/filetree/file_tree_view_model.go
index 05cc9cb89..439471b01 100644
--- a/pkg/gui/filetree/file_tree_view_model.go
+++ b/pkg/gui/filetree/file_tree_view_model.go
@@ -54,6 +54,10 @@ func (self *FileTreeViewModel) GetSelectedItemId() string {
 }
 
 func (self *FileTreeViewModel) GetSelectedItems() ([]*FileNode, int, int) {
+	if self.Len() == 0 {
+		return nil, 0, 0
+	}
+
 	startIdx, endIdx := self.GetSelectionRange()
 
 	nodes := []*FileNode{}