Merge remote-tracking branch 'refs/remotes/tmux-openbsd/master'

* refs/remotes/tmux-openbsd/master:
  Preserve pixel sizes with manual sizing.
  Add kittygraphics terminal feature.
  Add Kitty feature detection and sixel to WezTerm.
  Add image_support to replace sixel_support variable.
  Fail an integer format expression with a NaN or out-of-range value, from someone in GitHub issue 5725.
  Keep the row RM 1049 restores inside the saved grid, from someone in GitHub issue 5724.
  Ignore a resize from a client whose tty is closed, from someone in GitHub issue 5723.
  Do not use a dead pane when redrawing a menu, from someone in GitHub issue 5722.

format.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: format.c,v 1.425 2026/10/05 10:59:37 nicm Exp $ */
+/* $OpenBSD: format.c,v 1.427 2026/10/12 12:22:42 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -3070,9 +3070,9 @@ format_cb_version(__unused struct format_tree *ft)
 	return (xstrdup(getversion()));
 }
 
-/* Callback for sixel_support. */
+/* Callback for image_support. */
 static void *
-format_cb_sixel_support(__unused struct format_tree *ft)
+format_cb_image_support(__unused struct format_tree *ft)
 {
 #ifdef ENABLE_IMAGES
 	return (xstrdup("1"));
@@ -3753,6 +3753,9 @@ static const struct format_table_entry format_table[] = {
 	{ "host_short", FORMAT_TABLE_STRING,
 	  format_cb_host_short
 	},
+	{ "image_support", FORMAT_TABLE_STRING,
+	  format_cb_image_support
+	},
 	{ "insert_flag", FORMAT_TABLE_STRING,
 	  format_cb_insert_flag
 	},
@@ -4090,7 +4093,7 @@ static const struct format_table_entry format_table[] = {
 	  format_cb_session_windows
 	},
 	{ "sixel_support", FORMAT_TABLE_STRING,
-	  format_cb_sixel_support
+	  format_cb_image_support
 	},
 	{ "socket_path", FORMAT_TABLE_STRING,
 	  format_cb_socket_path
@@ -5803,6 +5806,17 @@ format_loop_clients(struct format_expand_state *es, const char *fmt)
 	return (value);
 }
 
+/* Truncate a value to a long long, failing if it is NaN or out of range. */
+static int
+format_truncate_integer(double *v)
+{
+	/* (double)LLONG_MAX is 2^63, which does not fit; -2^63 does. */
+	if (isnan(*v) || *v >= (double)LLONG_MAX || *v < (double)LLONG_MIN)
+		return (-1);
+	*v = (long long)*v;
+	return (0);
+}
+
 static char *
 format_replace_expression(struct format_modifier *mexp,
     struct format_expand_state *es, const char *copy)
@@ -5888,9 +5902,11 @@ format_replace_expression(struct format_modifier *mexp,
 		goto fail;
 	}
 
-	if (!use_fp) {
+	if (!use_fp &&
-		mleft = (long long)mleft;
+	    (format_truncate_integer(&mleft) != 0 ||
-		mright = (long long)mright;
+	    format_truncate_integer(&mright) != 0)) {
+		format_log(es, "expression side is out of range");
+		goto fail;
 	}
 	format_log(es, "expression left side is: %.*f", prec, mleft);
 	format_log(es, "expression right side is: %.*f", prec, mright);
@@ -5930,10 +5946,11 @@ format_replace_expression(struct format_modifier *mexp,
 		result = (mleft <= mright);
 		break;
 	}
-	if (use_fp)
+	if (!use_fp && format_truncate_integer(&result) != 0) {
-		xasprintf(&value, "%.*f", prec, result);
+		format_log(es, "expression result is out of range");
-	else
+		goto fail;
-		xasprintf(&value, "%.*f", prec, (double)(long long)result);
+	}
+	xasprintf(&value, "%.*f", prec, result);
 	format_log(es, "expression result is %s", value);
 
 	free(right);

menu.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: menu.c,v 1.71 2026/09/21 12:14:32 nicm Exp $ */
+/* $OpenBSD: menu.c,v 1.72 2026/10/12 10:46:12 nicm Exp $ */
 
 /*
  * Copyright (c) 2019 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -194,10 +194,19 @@ static void
 menu_reapply_styles(struct menu_data *md)
 {
 	struct options		*o = md->w->options;
+	struct session		*s = NULL;
+	struct winlink		*wl = NULL;
+	struct window_pane	*wp = NULL;
 	struct format_tree	*ft;
 	struct style		 sytmp;
 
-	ft = format_create_defaults(NULL, NULL, md->fs.s, md->fs.wl, md->fs.wp);
+	/* The pane (or session) the menu was opened for may be gone. */
+	if (cmd_find_valid_state(&md->fs)) {
+		s = md->fs.s;
+		wl = md->fs.wl;
+		wp = md->fs.wp;
+	}
+	ft = format_create_defaults(NULL, NULL, s, wl, wp);
 
 	/* Reapply menu style from options. */
 	memcpy(&md->style_gc, &grid_default_cell, sizeof md->style_gc);

resize.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: resize.c,v 1.59 2026/08/20 09:19:24 nicm Exp $ */
+/* $OpenBSD: resize.c,v 1.60 2026/10/12 13:08:19 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -152,7 +152,13 @@ clients_calculate_size(int type, int current, struct client *c,
 		*sx = UINT_MAX;
 		*sy = UINT_MAX;
 	}
-	*xpixel = *ypixel = 0;
+	if (w != NULL && type == WINDOW_SIZE_MANUAL) {
+		*xpixel = w->xpixel;
+		*ypixel = w->ypixel;
+	} else {
+		*xpixel = 0;
+		*ypixel = 0;
+	}
 
 	/*
 	 * For latest, count the number of clients with this window. We only
@@ -380,16 +386,30 @@ recalculate_size(struct window *w, int now)
 	/* Look for a suitable client and get the new size. */
 	changed = clients_calculate_size(type, current, NULL, NULL, w,
 	    recalculate_size_skip_client, &sx, &sy, &xpixel, &ypixel);
+	if (xpixel == 0)
+		xpixel = DEFAULT_XPIXEL;
+	if (ypixel == 0)
+		ypixel = DEFAULT_YPIXEL;
 
 	/*
 	 * Make sure the size has actually changed. If the window has already
 	 * got a resize scheduled, then use the new size; otherwise the old.
 	 */
 	if (w->flags & WINDOW_RESIZE) {
-		if (!now && changed && w->new_sx == sx && w->new_sy == sy)
+		if (!now &&
+		    changed &&
+		    w->new_sx == sx &&
+		    w->new_sy == sy &&
+		    w->new_xpixel == xpixel &&
+		    w->new_ypixel == ypixel)
 			changed = 0;
 	} else {
-		if (!now && changed && w->sx == sx && w->sy == sy)
+		if (!now &&
+		    changed &&
+		    w->sx == sx &&
+		    w->sy == sy &&
+		    w->xpixel == xpixel &&
+		    w->ypixel == ypixel)
 			changed = 0;
 	}
 

screen.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: screen.c,v 1.107 2026/07/26 09:20:54 nicm Exp $ */
+/* $OpenBSD: screen.c,v 1.108 2026/10/12 10:50:06 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -759,6 +759,10 @@ screen_alternate_off(struct screen *s, struct grid_cell *gc, int cursor)
 		return 0;
 	}
 
+	/* Clamp cursor to the current screen size. */
+	if (s->cy > screen_size_y(s) - 1)
+		s->cy = screen_size_y(s) - 1;
+
 	/* Restore the saved grid. */
 	grid_duplicate_lines(s->grid, screen_hsize(s), s->saved_grid, 0,
 	    s->saved_grid->sy);

server-client.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: server-client.c,v 1.519 2026/10/09 10:16:02 nicm Exp $ */
+/* $OpenBSD: server-client.c,v 1.520 2026/10/12 10:48:05 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -2599,7 +2599,7 @@ server_client_dispatch(struct imsg *imsg, void *arg)
 		if (datalen != 0)
 			goto bad;
 
-		if (c->flags & CLIENT_CONTROL)
+		if ((c->flags & CLIENT_CONTROL) || (~c->tty.flags & TTY_OPENED))
 			break;
 		server_client_update_latest(c);
 		old_sx = c->tty.sx;

tmux.1

@@ -1,4 +1,4 @@
-.\" $OpenBSD: tmux.1,v 1.1182 2026/10/09 13:12:14 nicm Exp $
+.\" $OpenBSD: tmux.1,v 1.1184 2026/10/12 12:35:03 nicm Exp $
 .\"
 .\" Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 .\"
@@ -14,7 +14,7 @@
 .\" IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 .\" OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: October 9 2026 $
+.Dd $Mdocdate: October 12 2026 $
 .Dt TMUX 1
 .Os
 .Sh NAME
@@ -5200,6 +5200,8 @@ Ignore function keys from
 and use the
 .Nm
 internal set only.
+.It kittygraphics
+Supports the Kitty graphics protocol with Unicode placeholders.
 .It margins
 Supports DECSLRM margins.
 .It mouse
@@ -7469,6 +7471,7 @@ The following variables are available, where appropriate:
 .It Li "hook_window_name" Ta "" Ta "Name of window where hook was run, if any"
 .It Li "host" Ta "#H" Ta "Hostname of local host"
 .It Li "host_short" Ta "#h" Ta "Hostname of local host (no domain name)"
+.It Li "image_support" Ta "" Ta "1 if server has support for images"
 .It Li "insert_flag" Ta "" Ta "Pane insert flag"
 .It Li "key_string" Ta "" Ta "String representation of the key binding"
 .It Li "key_repeat" Ta "" Ta "1 if key binding is repeatable"
@@ -7623,7 +7626,6 @@ The following variables are available, where appropriate:
 .It Li "session_stack" Ta "" Ta "Window indexes in most recent order"
 .It Li "session_windows" Ta "" Ta "Number of windows in session"
 .It Li "socket_path" Ta "" Ta "Server socket path"
-.It Li "sixel_support" Ta "" Ta "1 if server has support for SIXEL"
 .It Li "start_time" Ta "" Ta "Server start time"
 .It Li "synchronized_output_flag" Ta "" Ta "1 if pane has synchronized output enabled"
 .It Li "uid" Ta "" Ta "Server UID"

tmux.h

@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.1456 2026/10/12 10:39:05 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.1457 2026/10/12 12:35:03 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1765,6 +1765,7 @@ struct tty_term {
 #define TERM_SIXEL 0x40
 #define TERM_INVALIDMS 0x80
 #define TERM_NOREPLACE 0x100
+#define TERM_KITTYGRAPHICS 0x200
 	int		 flags;
 
 	LIST_ENTRY(tty_term) entry;

tty-features.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: tty-features.c,v 1.46 2026/09/24 08:16:13 nicm Exp $ */
+/* $OpenBSD: tty-features.c,v 1.48 2026/10/12 12:35:03 nicm Exp $ */
 
 /*
  * Copyright (c) 2020 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -369,6 +369,13 @@ static const struct tty_feature tty_feature_sixel = {
 	TERM_SIXEL
 };
 
+/* Terminal supports Kitty graphics Unicode placeholders. */
+static const struct tty_feature tty_feature_kittygraphics = {
+	"kittygraphics",
+	NULL,
+	TERM_KITTYGRAPHICS
+};
+
 /* Terminal supports the OSC 9;4 progress bar. */
 static const char *const tty_feature_progressbar_capabilities[] = {
 	"Spb=\\E]9;4;%p1%d;%p2%d\\E\\\\",
@@ -399,6 +406,7 @@ static const struct tty_feature *const tty_features[] = {
 	&tty_feature_extkeys,
 	&tty_feature_focus,
 	&tty_feature_ignorefkeys,
+	&tty_feature_kittygraphics,
 	&tty_feature_margins,
 	&tty_feature_mouse,
 	&tty_feature_osc7,
@@ -638,6 +646,7 @@ tty_default_features(struct client *c, const char *name, u_int version)
 			      "focus,"
 		  	      "hyperlinks,"
 			      "margins,"
+			      "sixel,"
 			      "usstyle"
 		},
 		{ .name = "ghostty",
@@ -652,7 +661,20 @@ tty_default_features(struct client *c, const char *name, u_int version)
 			      "osc7,"
 			      "sync,"
 			      "usstyle,"
-			      "progressbar"
+			      "progressbar,"
+			      "kittygraphics"
+		},
+		{ .name = "kitty",
+		  .features = TTY_FEATURES_BASE_MODERN_XTERM ","
+			      "ccolour,"
+			      "cstyle,"
+			      "extkeys,"
+			      "focus,"
+			      "hyperlinks,"
+			      "osc7,"
+			      "sync,"
+			      "usstyle,"
+			      "kittygraphics"
 		},
 		{ .name = "Rio",
 		  .features = TTY_FEATURES_BASE_MODERN_XTERM ","

tty-keys.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: tty-keys.c,v 1.216 2026/10/06 17:49:45 nicm Exp $ */
+/* $OpenBSD: tty-keys.c,v 1.217 2026/10/12 12:26:46 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1675,6 +1675,8 @@ tty_keys_extended_device_attributes(struct tty *tty, const char *buf,
 		tty_default_features(c, "mintty", 0);
 	else if (strncmp(tmp, "foot(", 5) == 0)
 		tty_default_features(c, "foot", 0);
+	else if (strncmp(tmp, "kitty(", 6) == 0)
+		tty_default_features(c, "kitty", 0);
 	else if (strncmp(tmp, "WezTerm ", 7) == 0)
 		tty_default_features(c, "WezTerm", 0);
 	else if (strncmp(tmp, "ghostty ", 8) == 0)

window-client.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: window-client.c,v 1.49 2026/08/31 12:41:03 kirill Exp $ */
+/* $OpenBSD: window-client.c,v 1.50 2026/10/12 12:35:03 nicm Exp $ */
 
 /*
  * Copyright (c) 2017 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -89,19 +89,20 @@ static const char *window_client_info_lines[] = {
 	"              #[#{E:tree-mode-border-style},acs]x#[default] "
 	WINDOW_CLIENT_FEATURE(hyperlinks) " "
 	WINDOW_CLIENT_FEATURE(ignorefkeys) " "
-	WINDOW_CLIENT_FEATURE(margins) " "
+	WINDOW_CLIENT_FEATURE(kittygraphics) " "
-	WINDOW_CLIENT_FEATURE(mouse),
+	WINDOW_CLIENT_FEATURE(margins),
 	"              #[#{E:tree-mode-border-style},acs]x#[default] "
+	WINDOW_CLIENT_FEATURE(mouse) " "
 	WINDOW_CLIENT_FEATURE(osc7) " "
 	WINDOW_CLIENT_FEATURE(overline) " "
-	WINDOW_CLIENT_FEATURE(progressbar) " "
+	WINDOW_CLIENT_FEATURE(progressbar),
-	WINDOW_CLIENT_FEATURE(rectfill),
 	"              #[#{E:tree-mode-border-style},acs]x#[default] "
+	WINDOW_CLIENT_FEATURE(rectfill) " "
 	WINDOW_CLIENT_FEATURE(sixel) " "
 	WINDOW_CLIENT_FEATURE(strikethrough) " "
-	WINDOW_CLIENT_FEATURE(sync) " "
+	WINDOW_CLIENT_FEATURE(sync),
-	WINDOW_CLIENT_FEATURE(title),
 	"              #[#{E:tree-mode-border-style},acs]x#[default] "
+	WINDOW_CLIENT_FEATURE(title) " "
 	WINDOW_CLIENT_FEATURE(usstyle) " "
 	WINDOW_CLIENT_FEATURE(utf8),
 	"#[#{E:tree-mode-border-style},acs]qqqqqqqqqqqqqqn#{R:q,#{window_width}}#[default]",