From df303770eadd8e3564cdfc26b5df2645d064acc7 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Mon, 21 Oct 2024 12:39:49 +0000
Subject: [PATCH] Add function to get current offset from copy mode, from
 Michael Grant.

---
 tmux.h        |  2 ++
 window-copy.c | 17 +++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/tmux.h b/tmux.h
index 52fb13ad..0e8d600e 100644
--- a/tmux.h
+++ b/tmux.h
@@ -3245,6 +3245,8 @@ void		 window_copy_pagedown(struct window_pane *, int, int);
 void		 window_copy_start_drag(struct client *, struct mouse_event *);
 char		*window_copy_get_word(struct window_pane *, u_int, u_int);
 char		*window_copy_get_line(struct window_pane *, u_int);
+int		 window_copy_get_current_offset(struct window_pane *, u_int *,
+		     u_int *);
 
 /* window-option.c */
 extern const struct window_mode window_customize_mode;
diff --git a/window-copy.c b/window-copy.c
index 7c8436f1..b271d5bb 100644
--- a/window-copy.c
+++ b/window-copy.c
@@ -4188,6 +4188,23 @@ window_copy_write_one(struct window_mode_entry *wme,
 	}
 }
 
+int
+window_copy_get_current_offset(struct window_pane *wp, u_int *offset,
+    u_int *size)
+{
+	struct window_mode_entry	*wme = TAILQ_FIRST(&wp->modes);
+	struct window_copy_mode_data	*data = wme->data;
+	u_int				 hsize;
+
+	if (data == NULL)
+		return (0);
+	hsize = screen_hsize(data->backing);
+
+	*offset = hsize - data->oy;
+	*size = hsize;
+	return (1);
+}
+
 static void
 window_copy_write_line(struct window_mode_entry *wme,
     struct screen_write_ctx *ctx, u_int py)