create placeholder when folder is empty when hiding files

src/files.rs

@@ -342,7 +342,12 @@ impl Files {
     }
 
     pub fn toggle_hidden(&mut self) {
-        self.show_hidden = !self.show_hidden
+        self.show_hidden = !self.show_hidden;
+        self.set_dirty();
+
+        if self.show_hidden == true {
+            self.remove_placeholder();
+        }
     }
 
     pub fn replace_file(&mut self,

src/fscache.rs

@@ -130,6 +130,7 @@ impl FsCache {
         let files = self.get_files(&dir, Stale::new())?.1;
         let mut files = files.wait()?;
         FsCache::apply_settingss(&self, &mut files).ok();
+        let files = FsCache::ensure_not_empty(files)?;
         Ok(files)
     }
 
@@ -230,6 +231,7 @@ impl FsCache {
             }
 
             files.sort();
+            let files = FsCache::ensure_not_empty(files)?;
             Ok(files)
         }));
 
@@ -265,6 +267,15 @@ impl FsCache {
         Ok(())
     }
 
+    pub fn ensure_not_empty(mut files: Files) -> HResult<Files> {
+        if files.len() == 0 {
+            let path = &files.directory.path;
+            let placeholder = File::new_placeholder(&path)?;
+            files.files.push(placeholder);
+        }
+        Ok(files)
+    }
+
 
     fn extract_tab_settings(files: &Files, selection: Option<File>) -> TabSettings {
         TabSettings {

src/listview.rs

@@ -35,6 +35,12 @@ impl Listable for ListView<Files> {
     }
 
     fn on_refresh(&mut self) -> HResult<()> {
+        if self.content.len() == 0 {
+            let path = &self.content.directory.path;
+            let placeholder = File::new_placeholder(&path)?;
+            self.content.files.push(placeholder);
+        }
+
         let sender = self.core.get_sender();
 
         let visible_files = self.core.coordinates.size_u().1 + self.offset + 1;