1 files changed, 94 insertions, 0 deletions
diff --git a/src/line/input.cc b/src/line/input.cc
new file mode 100644
index 0000000..9c593f7
--- /dev/null
+++ b/src/line/input.cc
@@ -0,0 +1,94 @@
+#include "line/input.h"
+
+#include <print>
+#include <string>
+#include <unistd.h>
+
+#include "line/cursor.h"
+#include "history.h"
+#include "line/getter.h"
+
+using namespace std;
+
+namespace ov4
+{
+
+void clear_below()
+{
+    print("\x1b[0J");
+}
+
+string readline()
+{
+    update_window_size();
+    history_vec.push_back("");
+    history_index = get_last_index();
+    reset_editor();
+
+    T_position pos = get_cursor_position();
+    prompt_pos = pos.col;
+    char c;
+    while (read(STDIN_FILENO, &c, 1) == 1)
+    {
+        if (iscntrl(c))
+        {
+            //print("control: {}\r\n", static_cast<unsigned char>(c));
+            //fflush(stdout);
+            if (c == 0x0A || c == 0x0D) // \n OR \r
+            {
+                //print("line: {}\r\n", line_buffer);
+                if (line_buffer.empty())
+                {
+                    history_index--;
+                    history_vec.pop_back();
+                }
+                else
+                {
+                    history_vec[get_last_index()] = line_buffer;
+                }
+                return line_buffer;
+            }
+
+            else if (c == 0x03) // control C
+            {
+                history_index--;
+                history_vec.pop_back();
+                return "";
+            }
+
+            // ESC sequence
+            else if (c == '\x1b')
+            {
+                char seq[10];
+                // eat [
+                if (read(STDIN_FILENO, seq + 0, 1) != 1)
+                    continue;
+
+                if (read(STDIN_FILENO, seq + 1, 1) != 1)
+                    continue;
+
+                move_cursor(seq[1]);
+            }
+        }
+
+        // normal char
+        else
+        {
+            cursor_input_char(c);
+            print_override(line_buffer);
+        }
+    }
+
+    if (line_buffer.empty())
+    {
+        history_index--;
+        history_vec.pop_back();
+    }
+    else
+    {
+        history_vec[get_last_index()] = line_buffer;
+    }
+    return line_buffer;
+}
+
+}
+\ No newline at end of file