extract InputHandler to input_handler.{cc,hh}

1 files changed, 100 insertions, 0 deletions

diff --git a/src/input_handler.hh b/src/input_handler.hh
new file mode 100644
index 00000000..a1a461a4
--- /dev/null
+++ b/src/input_handler.hh
@@ -0,0 +1,100 @@
+#ifndef input_handler_hh_INCLUDED
+#define input_handler_hh_INCLUDED
+
+#include "color.hh"
+#include "completion.hh"
+#include "context.hh"
+#include "editor.hh"
+#include "keys.hh"
+#include "string.hh"
+#include "utils.hh"
+
+namespace Kakoune
+{
+
+class Editor;
+
+enum class MenuEvent
+{
+    Select,
+    Abort,
+    Validate
+};
+using MenuCallback = std::function<void (int, MenuEvent, Context&)>;
+
+enum class PromptEvent
+{
+    Change,
+    Abort,
+    Validate
+};
+using PromptCallback = std::function<void (const String&, PromptEvent, Context&)>;
+using KeyCallback = std::function<void (Key, Context&)>;
+
+class InputMode;
+enum class InsertMode : unsigned;
+
+class InputHandler : public SafeCountable
+{
+public:
+    InputHandler(Editor& editor, String name = "");
+    ~InputHandler();
+
+    // switch to insert mode
+    void insert(InsertMode mode);
+    // repeat last insert mode key sequence
+    void repeat_last_insert();
+
+    // enter prompt mode, callback is called on each change,
+    // abort or validation with corresponding PromptEvent value
+    // returns to normal mode after validation if callback does
+    // not change the mode itself
+    void prompt(const String& prompt, ColorPair prompt_colors,
+                Completer completer, PromptCallback callback);
+    void set_prompt_colors(ColorPair prompt_colors);
+
+    // enter menu mode, callback is called on each selection change,
+    // abort or validation with corresponding MenuEvent value
+    // returns to normal mode after validation if callback does
+    // not change the mode itself
+    void menu(memoryview<String> choices,
+              MenuCallback callback);
+
+    // execute callback on next keypress and returns to normal mode
+    // if callback does not change the mode itself
+    void on_next_key(KeyCallback callback);
+
+    // process the given key
+    void handle_key(Key key);
+
+    void start_recording(char reg);
+    bool is_recording() const;
+    void stop_recording();
+    char recording_reg() const { return m_recording_reg; }
+
+    void reset_normal_mode();
+
+    Context& context() { return m_context; }
+    const Context& context() const { return m_context; }
+
+    String mode_string() const;
+    void clear_mode_trash();
+private:
+    Context m_context;
+
+    friend class InputMode;
+    std::unique_ptr<InputMode> m_mode;
+    std::vector<std::unique_ptr<InputMode>> m_mode_trash;
+
+    void change_input_mode(InputMode* new_mode);
+
+    using Insertion = std::pair<InsertMode, std::vector<Key>>;
+    Insertion m_last_insert = {InsertMode::Insert, {}};
+
+    char   m_recording_reg = 0;
+    String m_recorded_keys;
+};
+
+}
+
+#endif // input_handler_hh_INCLUDED