Spreadsheet: Allow importing sheets into an existing workbook

Userland/Applications/Spreadsheet/SpreadsheetWidget.cpp

@@ -130,6 +130,14 @@ SpreadsheetWidget::SpreadsheetWidget(GUI::Window& parent_window, NonnullRefPtrVe
         load_file(*response.value());
     });
 
+    m_import_action = GUI::Action::create("Import sheets...", [&](auto&) {
+        auto response = FileSystemAccessClient::Client::the().try_open_file(window());
+        if (response.is_error())
+            return;
+
+        import_sheets(*response.value());
+    });
+
     m_save_action = GUI::CommonActions::make_save_action([&](auto&) {
         if (current_filename().is_empty()) {
             m_save_as_action->activate();
@@ -448,6 +456,30 @@ void SpreadsheetWidget::load_file(Core::File& file)
     update_window_title();
 }
 
+void SpreadsheetWidget::import_sheets(Core::File& file)
+{
+    auto result = m_workbook->import_file(file);
+    if (result.is_error()) {
+        GUI::MessageBox::show_error(window(), result.error());
+        return;
+    }
+
+    if (!result.value())
+        return;
+
+    window()->set_modified(true);
+
+    m_cell_value_editor->on_change = nullptr;
+    m_current_cell_label->set_text("");
+    m_should_change_selected_cells = false;
+    while (auto* widget = m_tab_widget->active_widget()) {
+        m_tab_widget->remove_tab(*widget);
+    }
+
+    setup_tabs(m_workbook->sheets());
+    update_window_title();
+}
+
 bool SpreadsheetWidget::request_close()
 {
     if (!undo_stack().is_current_modified())
@@ -553,6 +585,8 @@ void SpreadsheetWidget::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_import_action);
+    file_menu.add_separator();
     file_menu.add_action(*m_quit_action);
 
     auto& edit_menu = window.add_menu("&Edit");

Userland/Applications/Spreadsheet/SpreadsheetWidget.h

@@ -25,6 +25,7 @@ public:
 
     void save(Core::File&);
     void load_file(Core::File&);
+    void import_sheets(Core::File&);
     bool request_close();
     void add_sheet();
     void add_sheet(NonnullRefPtr<Sheet>&&);
@@ -83,6 +84,8 @@ private:
     RefPtr<GUI::Action> m_save_as_action;
     RefPtr<GUI::Action> m_quit_action;
 
+    RefPtr<GUI::Action> m_import_action;
+
     RefPtr<GUI::Action> m_cut_action;
     RefPtr<GUI::Action> m_copy_action;
     RefPtr<GUI::Action> m_paste_action;

Userland/Applications/Spreadsheet/Workbook.cpp

@@ -76,4 +76,15 @@ Result<bool, String> Workbook::write_to_file(Core::File& file)
     return true;
 }
 
+Result<bool, String> Workbook::import_file(Core::File& file)
+{
+    auto mime = Core::guess_mime_type_based_on_filename(file.filename());
+
+    auto sheets = TRY(ImportDialog::make_and_run_for(m_parent_window, mime, file, *this));
+    auto has_any_changes = !sheets.is_empty();
+    m_sheets.extend(move(sheets));
+
+    return has_any_changes;
+}
+
 }

Userland/Applications/Spreadsheet/Workbook.h

@@ -20,6 +20,8 @@ public:
     Result<bool, String> open_file(Core::File&);
     Result<bool, String> write_to_file(Core::File&);
 
+    Result<bool, String> import_file(Core::File&);
+
     String const& current_filename() const { return m_current_filename; }
     bool set_filename(String const& filename);
     bool dirty() { return m_dirty; }