prepare for page

1 files changed, 16 insertions, 2 deletions

diff --git a/include/line/cursor.h b/include/line/cursor.h
index cdea934..7cae165 100644
--- a/include/line/cursor.h
+++ b/include/line/cursor.h
@@ -13,6 +13,12 @@ struct T_position
     int col;
 };
 
+enum class T_cursor_movement_direction
+{
+    LEFT,
+    RIGHT,
+};
+
 // 1-based
 inline int cursor_row;
 inline int cursor_col;
@@ -23,17 +29,23 @@ inline int window_size_row;
 inline int window_size_col;
 
 // 0-based index
-inline int line_buffer_index;
+inline int line_buffer_index_cursor;
+// index [begin, end] is displayed
+// NB: CLOSE interval
+inline int line_buffer_index_begin;
+inline int line_buffer_index_end;
 
 inline int buffer_len;
 
+inline std::string line_buffer;
+
 T_position get_cursor_position();
 
 void print_override(const std::string &s);
 
 void move_cursor(char c);
 
-void cursor_input(char c, std::string &buffer);
+void cursor_input_char(char c);
 
 int get_cursor_real_pos();
 
@@ -41,5 +53,7 @@ void update_window_size();
 
 void update_line_end_pos();
 
+void move_cursor(T_cursor_movement_direction d);
+
 }