right key open directory, left key gets back (when input is empty)

Fix #179

4 files changed, 30 insertions, 12 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index bbe5aba..6741221 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,5 @@
 ### master
+- right key open directory, left key gets back (when input is empty)
 - replace ~ in path arguments with user home dir
 - use $XDG_CONFIG_HOME/git/ignore when the normal core.excludesFile git setting is missing
 
diff --git a/src/browser_states.rs b/src/browser_states.rs
index 1181ee3..3dd0af3 100644
--- a/src/browser_states.rs
+++ b/src/browser_states.rs
@@ -166,6 +166,24 @@ impl BrowserState {
         }
     }
 
+    pub fn go_to_parent(
+        &mut self,
+        screen: &mut Screen,
+    ) -> AppStateCmdResult {
+        match &self.displayed_tree().selected_line().path.parent() {
+            Some(path) => AppStateCmdResult::from_optional_state(
+                BrowserState::new(
+                    path.to_path_buf(),
+                    self.displayed_tree().options.without_pattern(),
+                    screen,
+                    &Dam::unlimited(),
+                ),
+                Command::new(),
+            ),
+            None => AppStateCmdResult::DisplayError("no parent found".to_string()),
+        }
+    }
+
     fn normal_status_message(&self, has_pattern: bool) -> Composite<'static> {
         let tree = self.displayed_tree();
         if tree.selection == 0 {
diff --git a/src/browser_verbs.rs b/src/browser_verbs.rs
index 61d3f8f..291b6d3 100644
--- a/src/browser_verbs.rs
+++ b/src/browser_verbs.rs
@@ -89,18 +89,7 @@ impl VerbExecutor for BrowserState {
                 }
                 AppStateCmdResult::Keep
             }
-            ":parent" => match &self.displayed_tree().selected_line().path.parent() {
-                Some(path) => AppStateCmdResult::from_optional_state(
-                    BrowserState::new(
-                        path.to_path_buf(),
-                        self.displayed_tree().options.without_pattern(),
-                        screen,
-                        &Dam::unlimited(),
-                    ),
-                    Command::new(),
-                ),
-                None => AppStateCmdResult::DisplayError("no parent found".to_string()),
-            },
+            ":parent" => self.go_to_parent(screen),
             ":print_path" => {
                 external::print_path(&self.displayed_tree().selected_line().target(), con)?
             }
diff --git a/src/commands.rs b/src/commands.rs
index b7dd44f..b2b8675 100644
--- a/src/commands.rs
+++ b/src/commands.rs
@@ -244,6 +244,16 @@ impl Command {
                     return;
                 }
 
+                if *key == keys::LEFT && self.raw.is_empty() {
+                    self.set_action(Action::Back);
+                    return;
+                }
+
+                if *key == keys::RIGHT && self.raw.is_empty() {
+                    self.set_action(Action::OpenSelection);
+                    return;
+                }
+
                 if *key == keys::BACK_TAB {
                     // should probably be a normal verb instead of an action with a special
                     // handling here