From 55cf883581debc8bf31d4ecb07966603af6ac226 Mon Sep 17 00:00:00 2001
From: ChristianVisintin <christian.visintin1997@gmail.com>
Date: Sat, 28 Nov 2020 12:05:15 +0100
Subject: [PATCH] FileExplorer dirstack

---
 src/ui/activities/filetransfer_activity.rs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/ui/activities/filetransfer_activity.rs b/src/ui/activities/filetransfer_activity.rs
index 334bde5..668277e 100644
--- a/src/ui/activities/filetransfer_activity.rs
+++ b/src/ui/activities/filetransfer_activity.rs
@@ -120,6 +120,7 @@ enum InputMode {
 struct FileExplorer {
     pub index: usize,
     pub files: Vec<FsEntry>,
+    dirstack: VecDeque<PathBuf>,
 }
 
 impl FileExplorer {
@@ -130,8 +131,29 @@ impl FileExplorer {
         FileExplorer {
             index: 0,
             files: Vec::new(),
+            dirstack: VecDeque::with_capacity(16)
         }
     }
+
+    /// ### pushd
+    /// 
+    /// push directory to stack
+    pub fn pushd(&mut self, dir: &Path) {
+        // Check if stack overflows the size
+        if self.dirstack.len() + 1 > 16 {
+            self.dirstack.pop_back(); // Start cleaning events from back
+        }
+        // Eventually push front the new record
+        self.dirstack.push_front(PathBuf::from(dir));
+    }
+
+    /// ### popd
+    /// 
+    /// Pop directory from the stack and return the directory
+    pub fn popd(&mut self) -> Option<PathBuf> {
+        self.dirstack.pop_front()
+    }
+
 }
 
 /// ## FileExplorerTab