From a84c1096041f486c1d160fbc507008bb27095c8d Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Mon, 26 Aug 2024 07:14:40 +0000
Subject: [PATCH] Add window_pane_mode helper function to tell if a pane is in
 copy mode, from Michael Grant.

---
 format.c |  6 ++----
 tmux.h   |  6 ++++++
 window.c | 12 ++++++++++++
 3 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/format.c b/format.c
index 91d78f89..70ca142d 100644
--- a/format.c
+++ b/format.c
@@ -1136,8 +1136,7 @@ format_cb_mouse_word(struct format_tree *ft)
 		return (NULL);
 
 	if (!TAILQ_EMPTY(&wp->modes)) {
-		if (TAILQ_FIRST(&wp->modes)->mode == &window_copy_mode ||
-		    TAILQ_FIRST(&wp->modes)->mode == &window_view_mode)
+		if (window_pane_mode(wp) != WINDOW_PANE_NO_MODE)
 			return (window_copy_get_word(wp, x, y));
 		return (NULL);
 	}
@@ -1181,8 +1180,7 @@ format_cb_mouse_line(struct format_tree *ft)
 		return (NULL);
 
 	if (!TAILQ_EMPTY(&wp->modes)) {
-		if (TAILQ_FIRST(&wp->modes)->mode == &window_copy_mode ||
-		    TAILQ_FIRST(&wp->modes)->mode == &window_view_mode)
+		if (window_pane_mode(wp) != WINDOW_PANE_NO_MODE)
 			return (window_copy_get_line(wp, y));
 		return (NULL);
 	}
diff --git a/tmux.h b/tmux.h
index 4145fe8c..3394fecd 100644
--- a/tmux.h
+++ b/tmux.h
@@ -966,6 +966,11 @@ enum pane_lines {
 #define PANE_BORDER_ARROWS 2
 #define PANE_BORDER_BOTH 3
 
+/* Mode returned by window_pane_mode function. */
+#define WINDOW_PANE_NO_MODE 0
+#define WINDOW_PANE_COPY_MODE 1
+#define WINDOW_PANE_VIEW_MODE 2
+
 /* Screen redraw context. */
 struct screen_redraw_ctx {
 	struct client	*c;
@@ -3112,6 +3117,7 @@ void		 window_pane_update_used_data(struct window_pane *,
 		     struct window_pane_offset *, size_t);
 void		 window_set_fill_character(struct window *);
 void		 window_pane_default_cursor(struct window_pane *);
+int		 window_pane_mode(struct window_pane *);
 
 /* layout.c */
 u_int		 layout_count_cells(struct layout_cell *);
diff --git a/window.c b/window.c
index 4171df9f..be54ad02 100644
--- a/window.c
+++ b/window.c
@@ -1662,3 +1662,15 @@ window_pane_default_cursor(struct window_pane *wp)
 	s->default_mode = 0;
 	screen_set_cursor_style(c, &s->default_cstyle, &s->default_mode);
 }
+
+int
+window_pane_mode(struct window_pane *wp)
+{
+	if (TAILQ_FIRST(&wp->modes) != NULL) {
+		if (TAILQ_FIRST(&wp->modes)->mode == &window_copy_mode)
+			return (WINDOW_PANE_COPY_MODE);
+		if (TAILQ_FIRST(&wp->modes)->mode == &window_view_mode)
+			return (WINDOW_PANE_VIEW_MODE);
+	}
+	return (WINDOW_PANE_NO_MODE);
+}