--- lbbs/include/screen.h	2025/04/30 09:19:42	1.1
+++ lbbs/include/screen.h	2025/06/08 09:25:24	1.14
@@ -1,8 +1,7 @@
 /***************************************************************************
                             screen.h  -  description
                              -------------------
-    begin                : Mon Oct 18 2004
-    copyright            : (C) 2004 by Leaflet
+    copyright            : (C) 2004-2025 by Leaflet
     email                : leaflet@leafok.com
  ***************************************************************************/
 
@@ -10,7 +9,7 @@
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation; either version 2 of the License, or     *
+ *   the Free Software Foundation; either version 3 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
@@ -18,14 +17,27 @@
 #ifndef _SCREEN_H_
 #define _SCREEN_H_
 
-extern void moveto(int row, int col);
+#include <stddef.h>
 
-extern void clrtoeol();
+#define CTRL_SEQ_CLR_LINE "\033[K"
+#define MSG_EXT_MAX_LEN 200
 
-extern void clrline(int line_begin, int line_end);
+struct display_ctx_t
+{
+	int reach_begin; // of data
+	int reach_end; // of data
+   long line_top; // current screen
+   long line_bottom; // current screen
+   char msg[MSG_EXT_MAX_LEN];
+};
+typedef struct display_ctx_t DISPLAY_CTX;
 
-extern void clrtobot(int line_begin);
+typedef int (*display_data_key_handler)(int *p_key, DISPLAY_CTX *p_ctx);
 
+extern void moveto(int row, int col);
+extern void clrtoeol();
+extern void clrline(int line_begin, int line_end);
+extern void clrtobot(int line_begin);
 extern void clearscr();
 
 extern int press_any_key();
@@ -33,16 +45,17 @@ extern int press_any_key();
 extern void set_input_echo(int echo);
 
 extern int str_input(char *buffer, int buffer_length, int echo_mode);
-
 extern int get_data(int row, int col, char *prompt, char *buffer, int buffer_length, int echo_mode);
 
-extern int display_file(const char *filename);
-
-extern int display_file_ex(const char *filename, int begin_line, int wait);
-
-extern int show_top(char *status);
+// eof_exit = 0 : Do not exit at EOF
+//            1 : Prompt for any key at EOF, then exit
+//            2 : Exit at EOF without prompt
+extern int display_data(const void *p_data, long display_line_total, const long *p_line_offsets, int eof_exit,
+                        display_data_key_handler key_handler, const char *help_filename);
+extern int display_file(const char *filename, int eof_exit);
 
-extern int show_bottom(char *msg);
+extern int show_top(const char *str_left, const char *str_center, const char *str_right);
+extern int show_bottom(const char *msg);
 
 extern int show_active_board();