TextEditor: Add option to open the current file in File Manager

This change adds functionality to open the current file in the File
Manager from the File menu or through a button on the toolbar. If
there is no saved data then the functionality is disabled.

Userland/Applications/TextEditor/MainWidget.cpp

@@ -312,12 +312,24 @@ MainWidget::MainWidget()
         }
     });
 
+    auto file_manager_icon = Gfx::Bitmap::try_load_from_file("/res/icons/16x16/app-file-manager.png"sv).release_value_but_fixme_should_propagate_errors();
+    m_open_folder_action = GUI::Action::create("Open Containing Folder", { Mod_Ctrl | Mod_Shift, Key_O }, file_manager_icon, [&](auto&) {
+        auto lexical_path = LexicalPath(m_path);
+        Desktop::Launcher::open(URL::create_with_file_scheme(lexical_path.dirname(), lexical_path.basename()));
+    });
+    m_open_folder_action->set_enabled(!m_path.is_empty());
+    m_open_folder_action->set_status_tip("Open the current file location in File Manager");
+
     m_toolbar->add_action(*m_new_action);
     m_toolbar->add_action(*m_open_action);
     m_toolbar->add_action(*m_save_action);
 
     m_toolbar->add_separator();
 
+    m_toolbar->add_action(*m_open_folder_action);
+
+    m_toolbar->add_separator();
+
     m_toolbar->add_action(m_editor->cut_action());
     m_toolbar->add_action(m_editor->copy_action());
     m_toolbar->add_action(m_editor->paste_action());
@@ -360,6 +372,8 @@ void MainWidget::initialize_menubar(GUI::Window& window)
     file_menu.add_action(*m_save_action);
     file_menu.add_action(*m_save_as_action);
     file_menu.add_separator();
+    file_menu.add_action(*m_open_folder_action);
+    file_menu.add_separator();
     file_menu.add_action(GUI::CommonActions::make_quit_action([this](auto&) {
         if (!request_close())
             return;
@@ -717,6 +731,7 @@ void MainWidget::set_path(StringView path)
             set_preview_mode(PreviewMode::None);
     }
 
+    m_open_folder_action->set_enabled(!path.is_empty());
     update_title();
 }
 

Userland/Applications/TextEditor/MainWidget.h

@@ -71,6 +71,7 @@ private:
     RefPtr<GUI::Action> m_open_action;
     RefPtr<GUI::Action> m_save_action;
     RefPtr<GUI::Action> m_save_as_action;
+    RefPtr<GUI::Action> m_open_folder_action;
     RefPtr<GUI::Action> m_find_replace_action;
     RefPtr<GUI::Action> m_vim_emulation_setting_action;