Support "alternate screen" mode (terminfo smcup/rmcup) typically used by full

screen interactive programs to preserve the screen contents. When activated, it
saves a copy of the visible grid and disables scrolling into and resizing out
of the history; when deactivated the visible data is restored and the history
reenabled.

1 files changed, 10 insertions, 0 deletions

diff --git a/tmux.h b/tmux.h
index 28778e9f..481b0ca7 100644
--- a/tmux.h
+++ b/tmux.h
@@ -443,6 +443,9 @@ struct grid_utf8 {
 
 /* Entire grid of cells. */
 struct grid {
+	int	flags;
+#define GRID_HISTORY 0x1	/* scroll lines into history */
+
 	u_int	sx;
 	u_int	sy;
 
@@ -614,6 +617,11 @@ struct window_pane {
 	struct screen	*screen;
 	struct screen	 base;
 
+	/* Saved in alternative screen mode. */
+ 	u_int		 saved_cx;
+ 	u_int		 saved_cy;
+	struct grid	*saved_grid;
+
 	const struct window_mode *mode;
 	void		*modedata;
 
@@ -1328,6 +1336,8 @@ void	 grid_clear_lines(struct grid *, u_int, u_int);
 void	 grid_move_lines(struct grid *, u_int, u_int, u_int);
 void	 grid_move_cells(struct grid *, u_int, u_int, u_int, u_int);
 char	*grid_string_cells(struct grid *, u_int, u_int, u_int);
+void	 grid_duplicate_lines(
+    	     struct grid *, u_int, struct grid *, u_int, u_int);
 
 /* grid-view.c */
 const struct grid_cell *grid_view_peek_cell(struct grid *, u_int, u_int);