From b08732f9c11abfdb630e6620c108c65f5301ee8b Mon Sep 17 00:00:00 2001
From: Michele Bini <michele.bini@gmail.com>
Date: Mon, 8 Jan 2024 02:21:56 +0100
Subject: Ctrl-_ for seek to line by number, or random line Improve support of
 pipe mode


diff --git a/nanobox.c b/nanobox.c
index fec354c..2242d04 100644
--- a/nanobox.c
+++ b/nanobox.c
@@ -179,6 +179,7 @@
 //config:	  This option makes the HOME and RETURN key behave differently
 //config:         depending on the current indentation level.
 //config:
+#define ENABLE_FEATURE_NANO_GOTO_LINE 1
 #define ENABLE_FEATURE_NANO_DEVTTY 1
 #define ENABLE_FEATURE_NANO_STDIO 1
 //config:config FEATURE_NANO_STDIO_C
@@ -234,6 +235,7 @@
 #include <sys/stat.h>
 #include <sys/poll.h>
 #include <sys/ioctl.h>
+#include <sys/time.h
 #if 1
 #include "platform.h"
 #define FALSE 0
@@ -606,6 +608,7 @@ static void screen_erase(void);
 static void clear_to_eol(void);
 static void clear_to_eos(void);
 static void go_bottom_and_clear_to_eol(void);
+static void go_to_line(char*);
 static void standout_start(void);	// send "start reverse video" sequence
 static void standout_end(void);	// send "end reverse video" sequence
 static void show_status_line(void);	// put a message on the bottom line
@@ -889,7 +892,18 @@ static void edit_file(char *fn)
 	offset = 0;			// no horizontal offset
 	c = '\0';
 
-	redraw(FALSE);			// dont force every col re-draw
+        if (nano_stdio_mode) {
+          dot = end;
+          redraw(FALSE);			// dont force every col re-draw
+          dot_left();
+          // dot_left();
+          // dot_left();
+          refresh(FALSE);
+          // fprintf(stderr, "%s\n", "XXXXXXXXXXXXXXXXXXXXX");
+          // show_status_line();
+        } else {
+          redraw(FALSE);			// dont force every col re-draw
+        }
 	//------This is the main Nano cmd handling loop -----------------------
 	while (editing > 0) {
 #if ENABLE_FEATURE_NANO_CRASHME
@@ -922,7 +936,9 @@ static void edit_file(char *fn)
 	}
 	//-------------------------------------------------------------------
 
-	go_bottom_and_clear_to_eol();
+        if (!nano_stdio_mode) {
+          go_bottom_and_clear_to_eol();
+        }
 	cookmode();
 #undef cur_line
 }
@@ -2465,6 +2481,21 @@ static void not_implemented(const char *s)
 static char last_key_code = 0;
 #endif
 
+static void go_to_line(char*line)
+{
+  int lineno;
+  if (strcmp(line, "!") == 0) {
+    srand(time(NULL));
+    lineno = rand() % count_lines(text, end - 1);
+  } else {
+    lineno = atoi(line);
+    if (!(lineno > 1)) return;
+    lineno--;
+  }
+  for (dot = text; lineno > 0 && dot < end; lineno--) dot = next_line(dot);
+}
+
+
 // show file status on status line
 static int format_edit_status(void)
 {
@@ -2518,7 +2549,7 @@ static int format_edit_status(void)
 #if 0
 		" %ld"
 #endif
-		"   ^X=Exit ^O=Save ^W=Search ^K=Cut ^U=Paste M-u=Undo",
+		"   ^X=Exit ^O=Save ^W=Search ^K=Cut ^U=Paste ^_=GoTo M-u=Undo",
 		(current_filename != NULL ? current_filename : ""),
 #if ENABLE_FEATURE_NANO_READONLY
 		(readonly_mode ? " [Readonly]" : ""),
@@ -2974,6 +3005,14 @@ static void do_cmd(int c)
 		editing = 0;
  continue_editing:
 		break;
+#if ENABLE_FEATURE_NANO_GOTO_LINE
+	case CTRL_CODE('_'):
+		// p = get_input_line("Jump to line [!=random]: ", buf);
+		p = get_input_line("Go to line [!=random]: ", buf);
+		strcpy(buf, p);
+                go_to_line(p);
+                break;
+#endif
 #if ENABLE_FEATURE_NANO_SEARCH
 	case CTRL_CODE('W'):
 #define buf search__buf
-- 
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