add parent directory button

src/AppWidget.cpp

@@ -14,11 +14,13 @@ void AppWidget::on_init() {
 
     top_bar->on_action = [directory_view](TopBar::Action action) {
         if (action == TopBar::Action::Back) {
-            directory_view->back();
+            directory_view->go_back();
         } else if (action == TopBar::Action::Forward) {
-            directory_view->forward();
+            directory_view->go_forward();
         } else if (action == TopBar::Action::Home) {
-            directory_view->home();
+            directory_view->navigate_home();
+        } else if (action == TopBar::Action::ParentDirectory) {
+            directory_view->navigate_parent_directory();
         }
     };
 

src/DirectoryView.cpp

@@ -34,18 +34,22 @@ void DirectoryView::on_init() {
 
     m_target = make_target();
     m_target->set_layout<Raven::DocumentLayout>(12.0);
-    home();
+    navigate_home();
     set_did_init(true);
 }
 
-void DirectoryView::back() {
+void DirectoryView::go_back() {
     m_checkpoint_stack.undo();
 }
 
-void DirectoryView::forward() {
+void DirectoryView::go_forward() {
     m_checkpoint_stack.redo();
 }
 
-void DirectoryView::home() {
+void DirectoryView::navigate_home() {
     navigate(get_home_directory());
 }
+
+void DirectoryView::navigate_parent_directory() {
+    navigate(m_current_path.parent_path());
+}

src/DirectoryView.hpp

@@ -18,9 +18,10 @@ public:
 
     void navigate(std::string path);
     void navigate_relative(std::string path);
-    void back();
-    void forward();
-    void home();
+    void go_back();
+    void go_forward();
+    void navigate_home();
+    void navigate_parent_directory();
 protected:
     void set_current_path(std::filesystem::path path);
 

src/TopBar.cpp

@@ -9,7 +9,7 @@ void TopBar::on_init() {
     set_style(&Raven::accent_widget_style);
 
     auto layout = set_layout<Raven::BoxLayout>(Raven::Direction::Horizontal);
-    layout->slot_pixel(24, 3);
+    layout->slot_pixel(24, 4);
     layout->set_margin(4);
     layout->set_spacing(8);
 
@@ -17,6 +17,8 @@ void TopBar::on_init() {
     back_button->set_style(&Raven::default_button_style);
     auto forward_button = add<Raven::SvgWidget>("/usr/share/icons/Papirus/24x24/actions/next.svg");
     forward_button->set_style(&Raven::default_button_style);
+    auto parent_button = add<Raven::SvgWidget>("/usr/share/icons/Papirus/24x24/actions/up.svg");
+    parent_button->set_style(&Raven::default_button_style);
     auto home_button = add<Raven::SvgWidget>("/usr/share/icons/Papirus/24x24/actions/go-home.svg");
     home_button->set_style(&Raven::default_button_style);
 
@@ -29,6 +31,9 @@ void TopBar::on_init() {
     home_button->on_click = [this]() {
         on_action(Action::Home);
     };
+    parent_button->on_click = [this]() {
+        on_action(Action::ParentDirectory);
+    };
 
     set_did_init(true);
 }

src/TopBar.hpp

@@ -8,7 +8,8 @@ public:
 enum class Action {
     Back = 0,
     Forward,
-    Home
+    Home,
+    ParentDirectory
 };
 public:
     TopBar()