Move Client responsibilities to InputHandler

InputHandler owns it's UserInterface, and is directly stored by the ClientManager.

src/client_manager.cc

@@ -11,16 +11,6 @@
 namespace Kakoune
 {
 
-Client::Client(std::unique_ptr<UserInterface>&& ui,
-               Window& window, String name)
-    : m_user_interface(std::move(ui)),
-      m_input_handler(*m_user_interface),
-      m_name(std::move(name))
-{
-    kak_assert(not m_name.empty());
-    context().change_editor(window);
-}
-
 ClientManager::ClientManager() = default;
 ClientManager::~ClientManager() = default;
 
@@ -43,11 +33,11 @@ String ClientManager::generate_name() const
     }
 }
 
-Client* ClientManager::create_client(std::unique_ptr<UserInterface>&& ui,
+InputHandler* ClientManager::create_client(std::unique_ptr<UserInterface>&& ui,
                                            const String& init_commands)
 {
     Buffer& buffer = **BufferManager::instance().begin();
-    Client* client = new Client{std::move(ui), get_unused_window_for_buffer(buffer),
+    InputHandler* client = new InputHandler{std::move(ui), get_unused_window_for_buffer(buffer),
                                             generate_name()};
     m_clients.emplace_back(client);
     try
@@ -66,11 +56,11 @@ Client* ClientManager::create_client(std::unique_ptr<UserInterface>&& ui,
         return nullptr;
     }
 
-    client->m_user_interface->set_input_callback([client, this]() {
+    client->ui().set_input_callback([client, this]() {
         try
         {
-            while (client->m_user_interface->is_key_available())
+            while (client->ui().is_key_available())
-                client->m_input_handler.handle_key(client->m_user_interface->get_key());
+                client->handle_key(client->ui().get_key());
             client->context().window().forget_timestamp();
         }
         catch (Kakoune::runtime_error& error)
@@ -90,7 +80,7 @@ Client* ClientManager::create_client(std::unique_ptr<UserInterface>&& ui,
     return client;
 }
 
-void ClientManager::remove_client(Client& client)
+void ClientManager::remove_client(InputHandler& client)
 {
     for (auto it = m_clients.begin(); it != m_clients.end(); ++it)
     {
@@ -111,7 +101,7 @@ Window& ClientManager::get_unused_window_for_buffer(Buffer& buffer)
            continue;
 
         auto it = std::find_if(m_clients.begin(), m_clients.end(),
-                               [&](const std::unique_ptr<Client>& client)
+                               [&](const std::unique_ptr<InputHandler>& client)
                                { return &client->context().window() == w.get(); });
         if (it == m_clients.end())
         {
@@ -155,16 +145,16 @@ void ClientManager::ensure_no_client_uses_buffer(Buffer& buffer)
     m_windows.erase(end, m_windows.end());
 }
 
-void ClientManager::set_client_name(Client& client, String name)
+void ClientManager::set_client_name(InputHandler& client, String name)
 {
-    auto it = find_if(m_clients, [&name](std::unique_ptr<Client>& client)
+    auto it = find_if(m_clients, [&name](std::unique_ptr<InputHandler>& client)
                                  { return client->m_name == name; });
     if (it != m_clients.end() and it->get() != &client)
         throw runtime_error("name not unique: " + name);
     client.m_name = std::move(name);
 }
 
-Client& ClientManager::get_client(const Context& context)
+InputHandler& ClientManager::get_client(const Context& context)
 {
     for (auto& client : m_clients)
     {
@@ -174,7 +164,7 @@ Client& ClientManager::get_client(const Context& context)
     throw runtime_error("no client for current context");
 }
 
-Client& ClientManager::get_client(const String& name)
+InputHandler& ClientManager::get_client(const String& name)
 {
     for (auto& client : m_clients)
     {
@@ -184,7 +174,7 @@ Client& ClientManager::get_client(const String& name)
     throw runtime_error("no client named: " + name);
 }
 
-static DisplayLine generate_status_line(Client& client)
+static DisplayLine generate_status_line(InputHandler& client)
 {
     auto& context = client.context();
     auto pos = context.editor().main_selection().last();

src/client_manager.hh

@@ -9,33 +9,13 @@ namespace Kakoune
 
 struct client_removed{};
 
-class Client
-{
-public:
-    Context& context() { return m_input_handler.context(); }
-    const String& name() const { return m_name; }
-
-private:
-    friend class ClientManager;
-
-    Client(std::unique_ptr<UserInterface>&& ui,
-           Window& window, String name);
-    Client(Client&&) = delete;
-    Client& operator=(Client&& other) = delete;
-
-    const std::unique_ptr<UserInterface> m_user_interface;
-    InputHandler  m_input_handler;
-    String        m_name;
-};
-
-
 class ClientManager : public Singleton<ClientManager>
 {
 public:
     ClientManager();
     ~ClientManager();
 
-    Client* create_client(std::unique_ptr<UserInterface>&& ui,
+    InputHandler* create_client(std::unique_ptr<UserInterface>&& ui,
                                 const String& init_cmd);
 
     bool   empty() const { return m_clients.empty(); }
@@ -46,15 +26,15 @@ public:
 
     void redraw_clients() const;
 
-    Client&  get_client(const Context& context);
+    InputHandler& get_client(const Context& context);
-    Client&  get_client(const String& name);
+    InputHandler&  get_client(const String& name);
-    void set_client_name(Client& client, String name);
+    void set_client_name(InputHandler& client, String name);
-    void remove_client(Client& client);
+    void remove_client(InputHandler& client);
 
 private:
     String generate_name() const;
 
-    std::vector<std::unique_ptr<Client>> m_clients;
+    std::vector<std::unique_ptr<InputHandler>> m_clients;
     std::vector<std::unique_ptr<Window>> m_windows;
 };
 

src/commands.cc

@@ -537,6 +537,26 @@ void declare_option(CommandParameters params, Context& context)
         opt->set_from_string(params[2]);
 }
 
+class DraftUI : public UserInterface
+{
+public:
+    void print_status(const DisplayLine&) override {}
+
+    void menu_show(memoryview<String>, DisplayCoord, ColorPair, ColorPair, MenuStyle) override {}
+    void menu_select(int) override {}
+    void menu_hide() override {}
+
+    void info_show(const String&, DisplayCoord, ColorPair, MenuStyle) override {}
+    void info_hide() override {}
+
+    void draw(const DisplayBuffer&, const DisplayLine&) override {}
+    DisplayCoord dimensions() override { return {0,0}; }
+    bool is_key_available() override { return false; }
+    Key  get_key() override { return 'a'; }
+
+    void set_input_callback(InputCallback) override {}
+};
+
 template<typename Func>
 void context_wrap(CommandParameters params, Context& context, Func func)
 {
@@ -549,9 +569,10 @@ void context_wrap(CommandParameters params, Context& context, Func func)
 
     if (parser.has_option("draft"))
     {
-        InputHandler input_handler(real_context.ui());
         Editor& editor = real_context.editor();
-        input_handler.context().change_editor(editor);
+        InputHandler input_handler(std::unique_ptr<UserInterface>(new DraftUI()), editor,
+                                   real_context.has_input_handler() ?
+                                   real_context.input_handler().name() : "");
         DynamicSelectionList sels{editor.buffer(), editor.selections()};
         auto restore_sels = on_scope_end([&]{ editor.select(sels); });
         func(parser, input_handler.context());

src/context.cc

@@ -12,8 +12,8 @@ Context::Context() = default;
 Context::Context(Editor& editor)
     : m_editor(&editor) {}
 
-Context::Context(InputHandler& input_handler, UserInterface& ui)
+Context::Context(InputHandler& input_handler, Editor& editor)
-    : m_input_handler(&input_handler), m_ui(&ui) {}
+    : m_input_handler(&input_handler), m_editor(&editor) {}
 
 Context::~Context() = default;
 
@@ -54,7 +54,7 @@ UserInterface& Context::ui() const
 {
     if (not has_ui())
         throw runtime_error("no user interface in context");
-    return *m_ui;
+    return m_input_handler->ui();
 }
 
 OptionManager& Context::options() const

src/context.hh

@@ -23,7 +23,7 @@ struct Context
 {
     Context();
     explicit Context(Editor& editor);
-    Context(InputHandler& input_handler, UserInterface& ui);
+    Context(InputHandler& input_handler, Editor& editor);
     ~Context();
 
     Context(const Context&) = delete;
@@ -42,7 +42,7 @@ struct Context
     bool has_input_handler() const { return (bool)m_input_handler; }
 
     UserInterface& ui() const;
-    bool has_ui() const { return (bool)m_ui; }
+    bool has_ui() const { return (bool)m_input_handler; }
 
     void change_editor(Editor& editor);
 
@@ -60,7 +60,6 @@ struct Context
 private:
     safe_ptr<Editor>        m_editor;
     safe_ptr<InputHandler>  m_input_handler;
-    safe_ptr<UserInterface> m_ui;
 
     int m_numeric_param = 0;
 

src/input_handler.cc

@@ -914,8 +914,8 @@ InputMode& InputMode::reset_normal_mode()
 }
 
 
-InputHandler::InputHandler(UserInterface& ui)
+InputHandler::InputHandler(std::unique_ptr<UserInterface>&& ui, Editor& editor, String name)
-    : m_context(*this, ui), m_mode(new InputModes::Normal(*this))
+    : m_ui(std::move(ui)), m_context(*this, editor), m_mode(new InputModes::Normal(*this)), m_name(name)
 {
 }
 

src/input_handler.hh

@@ -37,7 +37,7 @@ enum class InsertMode : unsigned;
 class InputHandler : public SafeCountable
 {
 public:
-    InputHandler(UserInterface& ui);
+    InputHandler(std::unique_ptr<UserInterface>&& ui, Editor& editor, String name);
     ~InputHandler();
 
     // switch to insert mode
@@ -72,12 +72,19 @@ public:
     void stop_recording();
 
     Context& context() { return m_context; }
+    const String& name() const { return m_name; }
+
+    UserInterface& ui() const { return *m_ui; }
 private:
     Context m_context;
     friend class InputMode;
+    friend class ClientManager;
+    std::unique_ptr<UserInterface> m_ui;
     std::unique_ptr<InputMode> m_mode;
     std::vector<std::unique_ptr<InputMode>> m_mode_trash;
 
+    String m_name;
+
     using Insertion = std::pair<InsertMode, std::vector<Key>>;
     Insertion m_last_insert = {InsertMode::Insert, {}};
 

src/main.cc

@@ -150,7 +150,7 @@ void create_local_client(const String& init_command)
     };
 
     UserInterface* ui = new LocalNCursesUI{};
-    static Client* client = ClientManager::instance().create_client(
+    static InputHandler* client = ClientManager::instance().create_client(
         std::unique_ptr<UserInterface>{ui}, init_command);
     signal(SIGHUP, [](int) {
         if (client)