From cd55aa462b112896240ab736bf60035fdb30ca2d Mon Sep 17 00:00:00 2001
From: _ov4 <ov4@ov4.org>
Date: Sun, 18 Oct 2026 14:47:46 +0000
Subject: adapt line editor

---
 include/line/line_editor.h | 69 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 include/line/line_editor.h

(limited to 'include/line')

diff --git a/include/line/line_editor.h b/include/line/line_editor.h
new file mode 100644
index 0000000..a97b09c
--- /dev/null
+++ b/include/line/line_editor.h
@@ -0,0 +1,69 @@
+#pragma once
+
+#include <termios.h>
+#include <string>
+
+#include "line/type.h"
+
+namespace ov4
+{
+
+// mode
+inline termios attr;
+inline bool raw_enabled = false;
+
+void disable_raw();
+void enable_raw();
+void editor_exit(int code);
+
+class T_line_editor
+{
+public:
+    // cursor
+
+    // 1-based
+    int cursor_row = 1;
+    int cursor_col = 1;
+    int prompt_pos = 1;
+    int window_size_row = 24;
+    int window_size_col = 80;
+
+    // 0-based index
+    int buffer_index_cursor = 0;
+    // index [begin, end] is displayed
+    // NB: CLOSE interval
+    int _buffer_index_display_begin = 0;
+    //int buffer_index_display_end;
+
+    std::string line_buffer;
+
+    void print_override(const std::string &s);
+    void move_cursor(char c);
+    void cursor_input_char(char c);
+    void update_window_size();
+    void move_cursor(T_cursor_movement_direction d);
+    void switch_history(T_cursor_movement_direction d);
+    void reset_editor();
+    void cursor_skip_prompt();
+    void check_window_update();
+
+
+    // getter
+    bool windows_size_changed = false;
+
+    int get_terminal_pos_cursor();
+    int get_buffer_index_display_begin();
+    int get_buffer_index_display_end();
+    int get_terminal_pos_line_end();
+
+    //void update_line_end_pos();
+
+    T_position get_cursor_position();
+
+
+    // input
+    void clear_below();
+    std::string readline();
+};
+
+}
\ No newline at end of file
-- 
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