Merge branch 'master' into local_windows

CHANGES

@@ -1,3 +1,165 @@
+CHANGES FROM 3.7b TO 3.8
+
+* Many improvements to floating panes:
+
+  - new-pane and split-window can now set the title with -T and border lines
+    with -B, and new-pane -W waits for the pane command to exit;
+
+  - dragging with Ctrl now creates a new floating pane;
+
+  - modal panes may be created with new-pane -O; a window can have one modal
+    pane and it prevents interaction with the other panes while it is active.
+    A modal pane is now used for the editor in buffer mode;
+
+  - move-pane and resize-pane can now move and resize floating panes, including
+    mouse dragging;
+
+  - split-window in a floating pane creates a new floating pane that does not
+    overlap the active pane, if possible;
+
+  - break-pane can float a tiled pane, join-pane can tile a floating pane, and
+    swap-pane works with floating panes;
+
+  - choose-tree -h and choose-client -h hide the pane containing the mode, and
+    -k for choose commands kills the pane when the mode exits, which is useful
+    for modes in floating panes;
+
+  - pane-border-status has top-floating and bottom-floating, and there are new
+    default bindings under C-b g for common move and resize operations;
+
+  - floating panes are unzoomed before creation to avoid a crash.
+
+* Add support for themes and improve default colours:
+
+  - tmux now has builtin light and dark colour themes for terminals with 256 or
+    more colours; a new theme option controls whether tmux detects the terminal
+    theme, uses terminal colours, or forces light or dark (set to terminal for
+    the old colours);
+
+  - styles can use new theme colour names such as themeblack, themewhite and
+    themegreen, and colours in styles are expanded as formats;
+
+  - the terminal's own theme is reported to panes instead of being guessed from
+    the background, and inferred more accurately when theme reporting is not
+    supported (Ayman Bagabas, issue 5343);
+
+  - tree-mode-selection-style has been added, tree mode selection styling now
+    covers the whole line, and built-in modes use improved theme colours.
+
+* Improvements to customize mode:
+
+  - hooks and environment variables are now shown;
+
+  - e opens the selected value in an editor;
+
+  - C toggles showing only changed items;
+
+  - array item keys can now be changed.
+
+* Hooks (and control mode notifications) are now handled internally by using
+  events, each of which may carry keys and values as a payload. The control
+  mode subscriptions mechanism has been extended to allow general-purpose
+  "monitors" which check a format every second and trigger a hook when it
+  changes or becomes true:
+
+  - set-hook -B adds a monitor hook using the same subscription syntax as
+    refresh-client -B, and show-hooks -B lists them. -T runs the hook only when
+    the format is true;
+
+  - wait-for -E waits for hooks, notifications or user events, and set-hook -E
+    fires an event immediately;
+
+  - hooks have additional keys available. wait-for -v can be used to see the
+    keys sent with a hook event;
+
+  - new hooks to cover areas including client create and destroy, pane
+    activity, pane mode and prompt changes, pane movement and resizing, session
+    group changes and window creation, close and zoom;
+
+  - OSC 133 escape sequences now trigger events: pane-command-started,
+    pane-command-finished and pane-shell-prompt.
+
+* Add switch-mode, a fast switcher bound by default to Tab for windows and BTab
+  (S-Tab) for sessions.
+
+* Pane scrollbars now support auto-hide. This replaces the previous modal
+  behaviour where the pane was resized. With auto-hide, the scrollbar appears
+  while scrolling or while hovered and disappears after pane-scrollbars-timeout
+  (Michael Grant).
+
+* Change command templates so %% is escaped for single quotes while %1 remains
+  unquoted, preventing single quotes in session or target names from
+  terminating quoted command sections (reported by Aliz Hammond).
+
+* display-panes is now a mode rather than an overlay, and can be run inside
+  another pane. The -b flag has been removed.
+
+* Add new-window -E, respawn-pane -E and respawn-window -E as more convenient
+  methods to create an empty pane (rather than using '' for the command).
+
+* Menus now belong to the window, so appear on all clients.
+
+* Dragging over an existing copy mode selection now adjusts it (Michael Grant).
+
+* Rectangle selection in copy mode may extend past the end of the current line
+  to match vi's virtualedit=block behaviour (Mark Kelly, issue 5227).
+
+* With mode-keys set to vi, scrolling in copy mode now keeps the cursor in the
+  same position relative to the text (Arseniy Simonov, issue 5216).
+
+* Copy mode no longer exits at the bottom while a selection is in progress
+  (issue 5349).
+
+* Fix scrollbar initial state so scrollbars appear on new windows (issue 5339).
+
+* Add style attributes for dimming colours (dim=) and for hyperlinks (link= and
+  nolink) (issues 4842 and 4280 from Moritz Angermann).
+
+* New format modifiers: O: loops over options, V: loops over environments,
+  the I modifier reports client terminal information, t/d gives a time
+  difference in seconds, c/f and c/b emit colours, and the m operator supports
+  multiple terms and fuzzy matching.
+
+* Add or improve format variables including client_colours,
+  pane_start_command_list, window_manual_width, window_manual_height,
+  pane_last_output_time, pane_modal_flag and window_modal_pane.
+
+* Add additional pane sort orders, and a z sort order for choose-tree so
+  floating panes can be sorted by z-index.
+
+* Add -f filters to kill-pane -a, kill-window -a and kill-session -a (issue
+  4782).
+
+* Allow server ACLs to use groups as well as users (issue 4917).
+
+* The mouse option now defaults to on.
+
+* Fix send-keys -K so keys are inserted in the correct place in the input
+  queue, like keys from key bindings (issue 3476).
+
+* Fix control mode clients hanging on exit if pty data was still queued (Ben
+  Maurer, issue 5356), and avoid sending notifications to clients which are
+  already exiting (Ben Maurer, issue 5357).
+
+* Fix grouped sessions sometimes being left as unusable command targets while
+  they are being killed (Bryce Miller, issue 5180).
+
+* Fix choose mode filtering when more than one pane exists (issue 5326), and
+  fix an infinite loop in customize mode when a filter does not match.
+
+* Fix regsub when the pattern is anchored at the start (issue 5341).
+
+* Fix redraw issues around synchronized updates, copy mode, tabs, padding,
+  status lines, menus, popups, wide characters and floating panes. This
+  includes fixes for flicker with alternate screen applications and scrollbars
+  (Michael Grant, issue 5351; Noam Stolero, issue 5350; Aung Myo Kyaw, issue
+  5098).
+
+* Do not crash looking for the next or previous session (issue 5344), or when
+  no client is available.
+
+* Check time periodically in loops rather than for every item (issue 5367).
+
 CHANGES FROM 3.7a TO 3.7b
 
 * Fix so that the end of a synchronized update again triggers a redraw.

cmd-capture-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-capture-pane.c,v 1.67 2026/07/02 10:34:14 nicm Exp $ */
+/* $OpenBSD: cmd-capture-pane.c,v 1.68 2026/07/20 11:16:33 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Jonathan Alvarado <radobobo@users.sourceforge.net>
@@ -134,6 +134,7 @@ cmd_capture_pane_grid(struct window_pane *wp, size_t *len)
 	struct screen		*s = &wp->base;
 	struct grid		*gd = s->grid;
 	struct grid_line	*gl;
+	struct osc133_data	*od;
 	char			*buf = xstrdup(""), *line;
 	char			 p[11];
 	u_int			 yy, xx, total = gd->hsize + gd->sy;
@@ -149,9 +150,20 @@ cmd_capture_pane_grid(struct window_pane *wp, size_t *len)
 			snprintf(p, sizeof p, "-");
 		else
 			snprintf(p, sizeof p, "%u", yy - gd->hsize);
-		xasprintf(&line, "\tL %u (%s) flags=%s[%x] %u/%u\n", yy,
+		od = &gl->osc133_data;
-		    p, grid_line_flags_string(gl->flags), gl->flags,
+		if (gl->flags & GRID_LINE_OSC133_FLAGS) {
-		    gl->cellused, gl->cellsize);
+			xasprintf(&line, "\tL %u (%s) flags=%s[%x] "
+			    "%u/%u osc133=%u,%u,%u,%u,%u\n", yy, p,
+			    grid_line_flags_string(gl->flags), gl->flags,
+			    gl->cellused, gl->cellsize, od->prompt_col,
+			    od->cmd_col, od->out_start_col,
+			    od->out_end_col, od->exit_status);
+		} else {
+			xasprintf(&line, "\tL %u (%s) flags=%s[%x] "
+			    "%u/%u\n", yy, p,
+			    grid_line_flags_string(gl->flags), gl->flags,
+			    gl->cellused, gl->cellsize);
+		}
 		buf = cmd_capture_pane_append(buf, len, line, strlen(line));
 		free(line);
 

cmd-join-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-join-pane.c,v 1.72 2026/07/15 13:02:33 nicm Exp $ */
+/* $OpenBSD: cmd-join-pane.c,v 1.73 2026/07/17 15:24:30 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 George Nachman <tmux@georgester.com>
@@ -186,6 +186,7 @@ cmd_join_pane_place(struct cmdq_item *item, struct winlink *wl,
 		lc->g.yoff = yoff;
 		layout_fix_panes(w, NULL);
 	}
+	redraw_invalidate_scene(w);
 	events_fire_window("window-layout-changed", w);
 	server_redraw_window(w);
 
@@ -358,6 +359,7 @@ cmd_join_pane_zindex(struct cmdq_item *item, struct winlink *wl,
 	else
 		TAILQ_INSERT_TAIL(&w->z_index, wp, zentry);
 
+	redraw_invalidate_scene(w);
 	events_fire_window("window-layout-changed", w);
 	server_redraw_window(w);
 
@@ -397,6 +399,7 @@ cmd_join_pane_tile(struct cmdq_item *item, struct args *args, struct window *w,
 		window_set_active_pane(w, wp, 1);
 	layout_fix_offsets(w);
 	layout_fix_panes(w, NULL);
+	redraw_invalidate_scene(w);
 	events_fire_window("window-layout-changed", w);
 	server_redraw_window(w);
 

format.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: format.c,v 1.405 2026/07/15 13:02:33 nicm Exp $ */
+/* $OpenBSD: format.c,v 1.407 2026/07/20 07:42:13 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -2578,6 +2578,79 @@ format_cb_pane_tty(struct format_tree *ft)
 	return (NULL);
 }
 
+/* Callback for pane_unzoomed_height. */
+static void *
+format_cb_pane_unzoomed_height(struct format_tree *ft)
+{
+	struct window_pane	*wp = ft->wp;
+	struct window		*w;
+	struct layout_cell	*lc, *root;
+	int			 status, floating;
+	u_int			 sy;
+
+	if (wp == NULL)
+		return (NULL);
+	w = wp->window;
+
+	lc = wp->saved_layout_cell;
+	if (lc == NULL)
+		lc = wp->layout_cell;
+	if (lc == NULL)
+		return (NULL);
+	sy = lc->g.sy;
+	floating = (lc->flags & LAYOUT_CELL_FLOATING);
+
+	root = w->saved_layout_root;
+	if (root == NULL)
+		root = w->layout_root;
+	if (lc == wp->saved_layout_cell && !floating)
+		status = window_get_pane_status(w);
+	else
+		status = window_pane_get_pane_status(wp);
+	if (!floating &&
+	    root != NULL &&
+	    layout_add_horizontal_border(root, lc, status) &&
+	    sy > 1)
+		sy--;
+
+	return (format_printf("%u", sy));
+}
+
+/* Callback for pane_unzoomed_width. */
+static void *
+format_cb_pane_unzoomed_width(struct format_tree *ft)
+{
+	struct window_pane	*wp = ft->wp;
+	struct layout_cell	*lc;
+	int			 sb_w, sb_pad;
+	u_int			 sx;
+
+	if (wp == NULL)
+		return (NULL);
+
+	lc = wp->saved_layout_cell;
+	if (lc == NULL)
+		lc = wp->layout_cell;
+	if (lc == NULL)
+		return (NULL);
+	sx = lc->g.sx;
+
+	if (window_pane_scrollbar_reserve(wp)) {
+		sb_w = wp->scrollbar_style.width;
+		sb_pad = wp->scrollbar_style.pad;
+		if (sb_w < 1)
+			sb_w = 1;
+		if (sb_pad < 0)
+			sb_pad = 0;
+		if ((int)sx - sb_w - sb_pad < PANE_MINIMUM)
+			sx = PANE_MINIMUM;
+		else
+			sx -= sb_w + sb_pad;
+	}
+
+	return (format_printf("%u", sx));
+}
+
 /* Callback for pane_width. */
 static void *
 format_cb_pane_width(struct format_tree *ft)
@@ -3813,6 +3886,12 @@ static const struct format_table_entry format_table[] = {
 	{ "pane_unseen_changes", FORMAT_TABLE_STRING,
 	  format_cb_pane_unseen_changes
 	},
+	{ "pane_unzoomed_height", FORMAT_TABLE_STRING,
+	  format_cb_pane_unzoomed_height
+	},
+	{ "pane_unzoomed_width", FORMAT_TABLE_STRING,
+	  format_cb_pane_unzoomed_width
+	},
 	{ "pane_width", FORMAT_TABLE_STRING,
 	  format_cb_pane_width
 	},

grid.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: grid.c,v 1.153 2026/07/02 08:51:05 nicm Exp $ */
+/* $OpenBSD: grid.c,v 1.154 2026/07/20 11:16:33 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -233,6 +233,25 @@ grid_get_line(struct grid *gd, u_int line)
 	return (&gd->linedata[line]);
 }
 
+/* Get line time. */
+time_t
+grid_line_time(const struct grid_line *gl)
+{
+	if (gl->time == 0)
+		return (0);
+	return (start_time.tv_sec + gl->time - 1);
+}
+
+/* Set line time. */
+static void
+grid_line_set_time(struct grid_line *gl)
+{
+	if (current_time == 0)
+		gl->time = 0;
+	else
+		gl->time = current_time - start_time.tv_sec + 1;
+}
+
 /* Adjust number of lines. */
 void
 grid_adjust_lines(struct grid *gd, u_int lines)
@@ -486,7 +505,7 @@ grid_scroll_history(struct grid *gd, u_int bg)
 
 	gd->hscrolled++;
 	grid_compact_line(&gd->linedata[gd->hsize]);
-	gd->linedata[gd->hsize].time = current_time;
+	grid_line_set_time(&gd->linedata[gd->hsize]);
 	gd->hsize++;
 	gd->scroll_added++;
 }
@@ -528,7 +547,7 @@ grid_scroll_history_region(struct grid *gd, u_int upper, u_int lower, u_int bg)
 
 	/* Move the line into the history. */
 	memcpy(gl_history, gl_upper, sizeof *gl_history);
-	gl_history->time = current_time;
+	grid_line_set_time(gl_history);
 
 	/* Then move the region up and clear the bottom line. */
 	memmove(gl_upper, gl_upper + 1, (lower - upper) * sizeof *gl_upper);
@@ -1701,8 +1720,14 @@ grid_line_flags_string(int flags)
 		strlcat(s, "DEAD,", sizeof s);
 	if (flags & GRID_LINE_START_PROMPT)
 		strlcat(s, "START_PROMPT,", sizeof s);
+	if (flags & GRID_LINE_SECOND_PROMPT)
+		strlcat(s, "SECOND_PROMPT,", sizeof s);
+	if (flags & GRID_LINE_START_COMMAND)
+		strlcat(s, "START_COMMAND,", sizeof s);
 	if (flags & GRID_LINE_START_OUTPUT)
 		strlcat(s, "START_OUTPUT,", sizeof s);
+	if (flags & GRID_LINE_END_OUTPUT)
+		strlcat(s, "END_OUTPUT,", sizeof s);
 	if (flags & GRID_LINE_HYPERLINK)
 		strlcat(s, "HYPERLINK,", sizeof s);
 	if (*s == '\0')

input.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: input.c,v 1.268 2026/07/13 15:03:03 nicm Exp $ */
+/* $OpenBSD: input.c,v 1.269 2026/07/20 11:16:33 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -174,8 +174,6 @@ static void	input_osc_110(struct input_ctx *, const char *);
 static void	input_osc_111(struct input_ctx *, const char *);
 static void	input_osc_112(struct input_ctx *, const char *);
 static void	input_osc_133(struct input_ctx *, const char *);
-static void	input_fire_pane_title_changed(struct window_pane *,
-		    const char *);
 
 /* Transition entry/exit handlers. */
 static void	input_clear(struct input_ctx *);
@@ -212,21 +210,6 @@ static int	input_end_bel(struct input_ctx *);
 /* Command table comparison function. */
 static int	input_table_compare(const void *, const void *);
 
-static void
-input_fire_pane_title_changed(struct window_pane *wp, const char *title)
-{
-	struct event_payload	*ep;
-	struct cmd_find_state	 fs;
-
-	ep = event_payload_create();
-	cmd_find_from_pane(&fs, wp, 0);
-	event_payload_set_target(ep, &fs);
-	event_payload_set_pane(ep, "pane", wp);
-	event_payload_set_window(ep, "window", wp->window);
-	event_payload_set_string(ep, "new_title", "%s", title);
-	events_fire("pane-title-changed", ep);
-}
-
 /* Command table entry. */
 struct input_table_entry {
 	int		ch;
@@ -809,6 +792,22 @@ input_stop_utf8(struct input_ctx *ictx)
 	ictx->utf8started = 0;
 }
 
+/* Fire a title changed event. */
+static void
+input_fire_pane_title_changed(struct window_pane *wp, const char *title)
+{
+	struct event_payload	*ep;
+	struct cmd_find_state	 fs;
+
+	ep = event_payload_create();
+	cmd_find_from_pane(&fs, wp, 0);
+	event_payload_set_target(ep, &fs);
+	event_payload_set_pane(ep, "pane", wp);
+	event_payload_set_window(ep, "window", wp->window);
+	event_payload_set_string(ep, "new_title", "%s", title);
+	events_fire("pane-title-changed", ep);
+}
+
 /*
  * Timer - if this expires then have been waiting for a terminator for too
  * long, so reset to ground.
@@ -3192,6 +3191,35 @@ input_osc_112(struct input_ctx *ictx, const char *p)
 		screen_set_cursor_colour(ictx->ctx.s, -1);
 }
 
+/* Parse the OSC 133 D exit status. */
+static int
+input_osc_133_exit_status(const char *p)
+{
+	const char	*end;
+	char		*copy;
+	const char	*errstr;
+	long long	 status;
+
+	if (p[1] != ';' || p[2] == '\0' || strchr(p + 2, '=') == p + 2)
+		return (0);
+	end = strchr(p + 2, ';');
+	if (end == p + 2)
+		return (0);
+	if (end == NULL)
+		copy = xstrdup(p + 2);
+	else
+		copy = xstrndup(p + 2, end - (p + 2));
+	if (strchr(copy, '=') != NULL) {
+		free(copy);
+		return (0);
+	}
+	status = strtonum(copy, 0, 255, &errstr);
+	free(copy);
+	if (errstr != NULL)
+		return (255);
+	return (status);
+}
+
 /* Fire an OSC 133 command event. */
 static void
 input_fire_command_event(struct window_pane *wp, const char *name)
@@ -3237,27 +3265,51 @@ static void
 input_osc_133(struct input_ctx *ictx, const char *p)
 {
 	struct window_pane	*wp = ictx->wp;
-	struct grid		*gd = ictx->ctx.s->grid;
+	struct screen		*s = ictx->ctx.s;
-	u_int			 line = ictx->ctx.s->cy + gd->hsize;
+	struct grid		*gd = s->grid;
+	u_int			 line = s->cy + gd->hsize;
 	struct grid_line	*gl = NULL;
-	const char		*errstr;
+	const char		*cp;
 	int			 status;
 
-	if (line <= gd->hsize + gd->sy - 1)
+	if (line < gd->hsize + gd->sy)
 		gl = grid_get_line(gd, line);
 
 	switch (*p) {
 	case 'A':
-		if (gl != NULL)
+	case 'N':
+		if (gl != NULL) {
+			memset(&gl->osc133_data, 0, sizeof gl->osc133_data);
+			gl->osc133_data.prompt_col = s->cx;
 			gl->flags |= GRID_LINE_START_PROMPT;
+		}
 		if (wp != NULL) {
 			wp->last_prompt_time = time(NULL);
 			events_fire_pane("pane-shell-prompt", wp);
 		}
 		break;
+	case 'P':
+		if (gl != NULL) {
+			cp = strstr(p, ";k=s");
+			if (cp != NULL && (cp[4] == ';' || cp[4] == '\0'))
+				gl->flags |= GRID_LINE_SECOND_PROMPT;
+			else
+				gl->flags |= GRID_LINE_START_PROMPT;
+			gl->osc133_data.prompt_col = s->cx;
+		}
+		break;
+	case 'B':
+	case 'I':
+		if (gl != NULL) {
+			gl->flags |= GRID_LINE_START_COMMAND;
+			gl->osc133_data.cmd_col = s->cx;
+		}
+		break;
 	case 'C':
-		if (gl != NULL)
+		if (gl != NULL) {
 			gl->flags |= GRID_LINE_START_OUTPUT;
+			gl->osc133_data.out_start_col = s->cx;
+		}
 		if (wp != NULL) {
 			wp->cmd_start_time = time(NULL);
 			wp->cmd_end_time = 0;
@@ -3267,17 +3319,18 @@ input_osc_133(struct input_ctx *ictx, const char *p)
 		}
 		break;
 	case 'D':
+		status = input_osc_133_exit_status(p);
 		if (wp != NULL) {
 			wp->cmd_end_time = time(NULL);
 			wp->flags &= ~PANE_CMDRUNNING;
-			wp->cmd_status = -1;
+			wp->cmd_status = status;
-			if (p[1] == ';' && p[2] != '\0') {
-				status = strtonum(p + 2, 0, INT_MAX, &errstr);
-				if (errstr == NULL)
-					wp->cmd_status = status;
-			}
 			input_fire_command_event(wp, "pane-command-finished");
 		}
+		if (gl != NULL) {
+			gl->flags |= GRID_LINE_END_OUTPUT;
+			gl->osc133_data.out_end_col = s->cx;
+			gl->osc133_data.exit_status = status;
+		}
 		break;
 	}
 }

options-table.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: options-table.c,v 1.238 2026/07/15 13:02:33 nicm Exp $ */
+/* $OpenBSD: options-table.c,v 1.239 2026/07/19 17:36:38 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1349,7 +1349,8 @@ const struct options_table_entry options_table[] = {
 	{ .name = "display-panes-format",
 	  .type = OPTIONS_TABLE_STRING,
 	  .scope = OPTIONS_TABLE_WINDOW,
-	  .default_str = "#[align=right]#{pane_width}x#{pane_height}",
+	  .default_str = "#[align=right]"
+	                 "#{pane_unzoomed_width}x#{pane_unzoomed_height}",
 	  .text = "Format of text shown by 'display-panes', expanded for each "
 		  "pane."
 	},

regress/display-panes.sh

@@ -73,11 +73,14 @@ $TMUX new-session -d -s m -x 80 -y 24 'cat' || exit 1
 $TMUX split-window -t m:0 'cat' || exit 1
 p0=$($TMUX display-message -p -t m:0.0 '#{pane_id}')
 p1=$($TMUX display-message -p -t m:0.1 '#{pane_id}')
-$TMUX set -g display-panes-format 'P#{pane_index}' ||
+$TMUX set -g display-panes-format \
+    'P#{pane_index}:#{pane_unzoomed_width}x#{pane_unzoomed_height}' ||
 	fail "set display-panes-format failed"
 
 $TMUX2 new-session -d -s out -x 80 -y 24 "$TMUX attach -t m" || exit 1
 wait_clients 1
+p0_size=$($TMUX display-message -p -t "$p0" '#{pane_width}x#{pane_height}')
+p1_size=$($TMUX display-message -p -t "$p1" '#{pane_width}x#{pane_height}')
 
 capture()
 {
@@ -100,11 +103,38 @@ wait_capture()
 $TMUX display-panes -d 0 -t "$p0" || fail "display-panes failed"
 wait_format "$p0" '#{pane_mode}' 'panes-mode'
 wait_format "$p0" '#{window_zoomed_flag}' '1'
-wait_capture 'P0'
+wait_format "$p0" '#{pane_unzoomed_width}x#{pane_unzoomed_height}' \
-wait_capture 'P1'
+    "$p0_size"
+wait_capture "P0:$p0_size"
+wait_capture "P1:$p1_size"
 $TMUX send-keys -t "$p0" q || fail "exit panes mode failed"
 wait_format "$p0" '#{pane_in_mode}' '0'
 wait_format "$p0" '#{window_zoomed_flag}' '0'
+$TMUX set -g display-panes-format 'P#{pane_index}' ||
+	fail "reset display-panes-format failed"
+
+# Unzoomed sizes match the visible pane size when scrollbars reserve space.
+$TMUX set -w -t m:0 pane-scrollbars on ||
+	fail "set pane-scrollbars failed"
+$TMUX set -w -t m:0 pane-scrollbars-style "width=2,pad=1" ||
+	fail "set pane-scrollbars-style failed"
+p0_size=$($TMUX display-message -p -t "$p0" '#{pane_width}x#{pane_height}')
+p1_size=$($TMUX display-message -p -t "$p1" '#{pane_width}x#{pane_height}')
+$TMUX set -g display-panes-format \
+    'S#{pane_index}:#{pane_unzoomed_width}x#{pane_unzoomed_height}' ||
+	fail "set scrollbar display-panes-format failed"
+$TMUX display-panes -d 0 -t "$p0" || fail "display-panes scrollbar failed"
+wait_format "$p0" '#{window_zoomed_flag}' '1'
+wait_format "$p0" '#{pane_unzoomed_width}x#{pane_unzoomed_height}' \
+    "$p0_size"
+wait_capture "S0:$p0_size"
+wait_capture "S1:$p1_size"
+$TMUX send-keys -t "$p0" q || fail "exit scrollbar panes mode failed"
+wait_format "$p0" '#{pane_in_mode}' '0'
+$TMUX set -w -t m:0 pane-scrollbars off ||
+	fail "reset pane-scrollbars failed"
+$TMUX set -g display-panes-format 'P#{pane_index}' ||
+	fail "reset display-panes-format after scrollbars failed"
 
 # -Z starts unzoomed.
 $TMUX display-panes -Zd 0 -t "$p0" || fail "display-panes -Z failed"
@@ -192,13 +222,21 @@ $TMUX set -g display-panes-format 'P#{pane_index}' ||
 # pane content into the status row.
 $TMUX set -w -t m:0 pane-border-status top ||
 	fail "set pane-border-status failed"
-$TMUX set -g display-panes-format '' || fail "clear display-panes-format failed"
+status_p0_size=$($TMUX display-message -p -t "$p0" \
+    '#{pane_width}x#{pane_height}')
+status_p1_size=$($TMUX display-message -p -t "$p1" \
+    '#{pane_width}x#{pane_height}')
+$TMUX set -g display-panes-format \
+    '#[align=right]T#{pane_index}:#{pane_unzoomed_width}x#{pane_unzoomed_height}' ||
+	fail "set status display-panes-format failed"
 $TMUX respawn-pane -k -t "$p0" 'printf "STATUS-TOP\n"; exec cat' ||
 	fail "write status marker failed"
 wait_capture 'STATUS-TOP'
 $TMUX display-panes -d 0 -t "$p0" || fail "display-panes status failed"
 wait_format "$p0" '#{pane_mode}' 'panes-mode'
 wait_capture 'STATUS-TOP'
+wait_capture "T0:$status_p0_size"
+wait_capture "T1:$status_p1_size"
 CAPTURED=$(capture)
 first=$(printf '%s\n' "$CAPTURED" | sed -n '1p')
 second=$(printf '%s\n' "$CAPTURED" | sed -n '2p')
@@ -230,13 +268,18 @@ wait_format "$fp" '#{pane_mode}' 'panes-mode'
 wait_format "$fp" '#{window_zoomed_flag}' '1'
 wait_capture '┌'
 wait_capture '┘'
+fp_size=$($TMUX display-message -p -t "$fp" \
+    '#{pane_unzoomed_width}x#{pane_unzoomed_height}')
+[ "$fp_size" = "30x8" ] ||
+	fail "expected floating unzoomed size 30x8, got $fp_size"
 $TMUX send-keys -t "$fp" q || fail "exit zoomed floating panes mode failed"
 wait_format "$fp" '#{pane_in_mode}' '0'
 wait_format "$fp" '#{window_zoomed_flag}' '0'
 
 $TMUX resize-pane -t "$fp" -x 48 -y 14 ||
 	fail "resize floating pane larger failed"
-$TMUX set -g display-panes-format '#[align=right]FP#{pane_width}x#{pane_height}' ||
+$TMUX set -g display-panes-format \
+    '#[align=right]FP#{pane_unzoomed_width}x#{pane_unzoomed_height}' ||
 	fail "set floating display-panes-format failed"
 $TMUX display-panes -Zd 0 -t "$fp" || fail "display-panes floating format failed"
 wait_format "$fp" '#{pane_mode}' 'panes-mode'

regress/input-modes.sh

@@ -5,11 +5,20 @@
 start_pane alternate 10 3 'MAIN\033[?1049hALT\033[?1049lZ\n'
 check_capture alternate 'MAINZ'
 
-start_pane osc133 10 4 '\033]133;A\007prompt\n\033]133;C\007output\n'
+start_pane osc133 20 8 'xx\033]133;A\007p>\033]133;B\007cmd\nxy\033]133;P;k=s\007more\nzz\033]133;C\007out\033]133;D;7\007\nq\033]133;C\007bad\033]133;D;-1\007\nqq\033]133;C\007big\033]133;D;300\007\nzzz\033]133;C\007ok\033]133;D\007\n'
-check_capture osc133 'prompt
+check_capture osc133 'xxp>cmd
-output'
+xymore
-check_flags osc133 'P prompt
+zzout
-O output'
+qbad
+qqbig
+zzzok'
+check_raw_matches osc133 \
+	'L 0 \(0\) flags=START_PROMPT,START_COMMAND\[[0-9a-f]+\].* osc133=2,4,0,0,0' \
+	'L 1 \(1\) flags=SECOND_PROMPT\[[0-9a-f]+\].* osc133=2,0,0,0,0' \
+	'L 2 \(2\) flags=START_OUTPUT,END_OUTPUT\[[0-9a-f]+\].* osc133=0,0,2,5,7' \
+	'L 3 \(3\) flags=START_OUTPUT,END_OUTPUT\[[0-9a-f]+\].* osc133=0,0,1,4,255' \
+	'L 4 \(4\) flags=START_OUTPUT,END_OUTPUT\[[0-9a-f]+\].* osc133=0,0,2,5,255' \
+	'L 5 \(5\) flags=START_OUTPUT,END_OUTPUT\[[0-9a-f]+\].* osc133=0,0,3,5,0'
 
 $TMUX kill-server 2>/dev/null
 exit $exit_status

regress/tty-keys.sh

@@ -21,7 +21,7 @@ exit_status=0
 format_string () {
 	case $1 in
 		*\')
-			printf '"%%%%"'
+			printf '"%%%%%%"'
 			;;
 		*)
 			printf "'%%%%'"

screen-write.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: screen-write.c,v 1.283 2026/07/09 07:35:05 nicm Exp $ */
+/* $OpenBSD: screen-write.c,v 1.284 2026/07/20 11:16:33 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1606,6 +1606,7 @@ screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
 	struct grid_line		*gl;
 	u_int				 sx = screen_size_x(s);
 	struct screen_write_citem	*ci = ctx->item;
+	struct osc133_data		 od;
 	u_int				 flags;
 
 	gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
@@ -1617,10 +1618,12 @@ screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
 
-	flags = gl->flags & (GRID_LINE_START_PROMPT|GRID_LINE_START_OUTPUT);
+	flags = gl->flags & GRID_LINE_OSC133_FLAGS;
+	memcpy(&od, &gl->osc133_data, sizeof od);
 	grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
 	gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
 	gl->flags |= flags;
+	memcpy(&gl->osc133_data, &od, sizeof gl->osc133_data);
 
 	screen_write_collect_clear(ctx, s->cy, 1);
 	ci->x = 0;

tmux.1

@@ -1,4 +1,4 @@
-.\" $OpenBSD: tmux.1,v 1.1143 2026/07/17 12:42:51 nicm Exp $
+.\" $OpenBSD: tmux.1,v 1.1144 2026/07/19 17:36:38 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: July 17 2026 $
+.Dd $Mdocdate: July 19 2026 $
 .Dt TMUX 1
 .Os
 .Sh NAME
@@ -6610,7 +6610,7 @@ shows the subscriptions installed with
 .Sh MOUSE SUPPORT
 If the
 .Ic mouse
-option is on (the default is off),
+option is on,
 .Nm
 allows mouse events to be bound as keys.
 The name of each key is made up of a mouse event (such as
@@ -7348,6 +7348,8 @@ The following variables are available, where appropriate:
 .It Li "pane_top" Ta "" Ta "Top of pane"
 .It Li "pane_tty" Ta "" Ta "Pseudo terminal of pane"
 .It Li "pane_unseen_changes" Ta "" Ta "1 if there were changes in pane while in mode"
+.It Li "pane_unzoomed_height" Ta "" Ta "Height of pane when not zoomed"
+.It Li "pane_unzoomed_width" Ta "" Ta "Width of pane when not zoomed"
 .It Li "pane_width" Ta "" Ta "Width of pane"
 .It Li "pane_x" Ta "" Ta "X position of pane"
 .It Li "pane_y" Ta "" Ta "Y position of pane"

tmux.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.c,v 1.221 2026/06/29 18:17:28 nicm Exp $ */
+/* $OpenBSD: tmux.c,v 1.222 2026/07/19 19:09:30 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -375,7 +375,7 @@ find_home(void)
 	if (home == NULL || *home == '\0') {
 		pw = getpwuid(getuid());
 		if (pw != NULL)
-			home = pw->pw_dir;
+			home = xstrdup(pw->pw_dir);
 		else
 			home = NULL;
 	}

tmux.h

@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.1408 2026/07/17 12:42:51 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.1411 2026/07/20 11:16:33 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -809,8 +809,19 @@ struct colour_palette {
 #define GRID_LINE_EXTENDED 0x2
 #define GRID_LINE_DEAD 0x4
 #define GRID_LINE_START_PROMPT 0x8
-#define GRID_LINE_START_OUTPUT 0x10
+#define GRID_LINE_SECOND_PROMPT 0x10
-#define GRID_LINE_HYPERLINK 0x20
+#define GRID_LINE_START_COMMAND 0x20
+#define GRID_LINE_START_OUTPUT 0x40
+#define GRID_LINE_END_OUTPUT 0x80
+#define GRID_LINE_HYPERLINK 0x100
+
+/* All OSC 133 flags. */
+#define GRID_LINE_OSC133_FLAGS \
+	(GRID_LINE_START_PROMPT| \
+	 GRID_LINE_SECOND_PROMPT| \
+	 GRID_LINE_START_COMMAND| \
+	 GRID_LINE_START_OUTPUT| \
+	 GRID_LINE_END_OUTPUT)
 
 /* Grid string flags. */
 #define GRID_STRING_WITH_SEQUENCES 0x1
@@ -879,17 +890,27 @@ struct grid_cell_entry {
 	u_char			flags;
 } __packed;
 
+/* OSC 133 data for a grid line. */
+struct osc133_data {
+	u_short			 prompt_col;
+	u_short			 cmd_col;
+	u_short			 out_start_col;
+	u_short			 out_end_col;
+	u_char			 exit_status;
+};
+
 /* Grid line. */
 struct grid_line {
 	struct grid_cell_entry	*celldata;
-	u_int			 cellused;
-	u_int			 cellsize;
-
 	struct grid_extd_entry	*extddata;
+
+	u_short			 cellused;
+	u_short			 cellsize;
 	u_int			 extdsize;
 
-	int			 flags;
+	u_int			 time;
-	time_t			 time;
+	struct osc133_data	 osc133_data;
+	u_short			 flags;
 };
 
 /* Entire grid of cells. */
@@ -3477,6 +3498,7 @@ int	 grid_compare(struct grid *, struct grid *);
 const char *grid_line_flags_string(int);
 const char *grid_cell_flags_string(int);
 const char *grid_cell_attr_string(int);
+time_t	 grid_line_time(const struct grid_line *);
 void	 grid_collect_history(struct grid *, int);
 void	 grid_remove_history(struct grid *, u_int );
 void	 grid_scroll_history(struct grid *, u_int);

window-copy.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: window-copy.c,v 1.421 2026/07/14 17:17:18 nicm Exp $ */
+/* $OpenBSD: window-copy.c,v 1.422 2026/07/20 11:16:33 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1107,9 +1107,11 @@ window_copy_formats(struct window_mode_entry *wme, struct format_tree *ft)
 	u_int				 hsize = screen_hsize(data->backing);
 	u_int				 position, limit;
 	struct grid_line		*gl;
+	time_t				 t;
 
 	gl = grid_get_line(data->backing->grid, hsize - data->oy);
-	format_add(ft, "top_line_time", "%llu", (unsigned long long)gl->time);
+	t = grid_line_time(gl);
+	format_add(ft, "top_line_time", "%llu", (unsigned long long)t);
 
 	format_add(ft, "scroll_position", "%d", data->oy);
 	if (window_copy_line_number_is_absolute(wme)) {

window-panes.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: window-panes.c,v 1.1 2026/07/14 17:17:18 nicm Exp $ */
+/* $OpenBSD: window-panes.c,v 1.3 2026/07/19 19:53:11 nicm Exp $ */
 
 /*
  * Copyright (c) 2026 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -57,6 +57,7 @@ struct window_panes_modedata {
 	u_int				 source_session;
 	u_int				 source_window;
 	struct screen			 screen;
+	struct screen			*preview;
 
 	struct event			 timer;
 
@@ -103,6 +104,24 @@ window_panes_get_source(struct window_panes_modedata *data, struct session **sp,
 	return (1);
 }
 
+static void
+window_panes_set_preview(struct window_panes_modedata *data)
+{
+	struct window_pane	*wp = data->wp;
+	struct screen		*src = &wp->base, *dst;
+	struct screen_write_ctx	 ctx;
+	u_int			 sx = screen_size_x(src), sy = screen_size_y(src);
+
+	data->preview = dst = xmalloc(sizeof *data->preview);
+	screen_init(dst, sx, sy, 0);
+	screen_write_start(&ctx, dst);
+	screen_write_fast_copy(&ctx, src, 0, src->grid->hsize, sx, sy);
+	screen_write_stop(&ctx);
+	dst->mode = src->mode;
+	dst->cx = src->cx;
+	dst->cy = src->cy;
+}
+
 static void
 window_panes_free_areas(struct window_panes_modedata *data)
 {
@@ -379,7 +398,7 @@ window_panes_mark_pane_status_borders(u_char *map, struct window *w,
 }
 
 static int
-window_panes_get_floating_frame(struct window_pane *wp, u_int osx, u_int osy,
+window_panes_get_floating_borders(struct window_pane *wp, u_int osx, u_int osy,
     u_int dsx, u_int dsy, int *xp, int *yp, int *x2p, int *y2p)
 {
 	struct layout_cell	*lc;
@@ -404,12 +423,12 @@ window_panes_get_floating_frame(struct window_pane *wp, u_int osx, u_int osy,
 }
 
 static int
-window_panes_clip_floating_body(struct window_pane *wp, u_int osx, u_int osy,
+window_panes_clip_floating_pane(struct window_pane *wp, u_int osx, u_int osy,
     u_int dsx, u_int dsy, u_int *xp, u_int *yp, u_int *sxp, u_int *syp)
 {
 	int	x, y, x2, y2, bx, by, bx2, by2;
 
-	if (!window_panes_get_floating_frame(wp, osx, osy, dsx, dsy, &x, &y,
+	if (!window_panes_get_floating_borders(wp, osx, osy, dsx, dsy, &x, &y,
 	    &x2, &y2))
 		return (1);
 
@@ -601,7 +620,7 @@ window_panes_draw_floating_border(struct screen_write_ctx *ctx,
 
 	if (dsx == 0 || dsy == 0)
 		return;
-	if (!window_panes_get_floating_frame(wp, osx, osy, dsx, dsy, &x, &y,
+	if (!window_panes_get_floating_borders(wp, osx, osy, dsx, dsy, &x, &y,
 	    &x2, &y2))
 		return;
 
@@ -634,7 +653,7 @@ window_panes_clear_floating_area(struct screen_write_ctx *ctx,
 	struct grid_cell	gc;
 	int			x, y, x2, y2, xx, yy;
 
-	if (!window_panes_get_floating_frame(wp, osx, osy, dsx, dsy, &x, &y,
+	if (!window_panes_get_floating_borders(wp, osx, osy, dsx, dsy, &x, &y,
 	    &x2, &y2))
 		return;
 
@@ -778,6 +797,7 @@ window_panes_draw_pane(struct window_panes_modedata *data,
     struct screen_write_ctx *ctx, struct window_pane *wp,
     struct layout_cell *root, u_int osx, u_int osy, u_int dsx, u_int dsy)
 {
+	struct screen		*s = &wp->base;
 	u_int			 pane, x, y, sx, sy;
 
 	if (!window_panes_pane_visible(wp))
@@ -785,7 +805,7 @@ window_panes_draw_pane(struct window_panes_modedata *data,
 	if (!window_panes_get_geometry(wp, root, osx, osy, dsx, dsy, &x, &y,
 	    &sx, &sy))
 		return;
-	if (!window_panes_clip_floating_body(wp, osx, osy, dsx, dsy, &x, &y,
+	if (!window_panes_clip_floating_pane(wp, osx, osy, dsx, dsy, &x, &y,
 	    &sx, &sy))
 		return;
 	if (window_pane_index(wp, &pane) != 0)
@@ -793,11 +813,15 @@ window_panes_draw_pane(struct window_panes_modedata *data,
 	window_panes_add_area(data, wp, x, y, sx, sy);
 
 	screen_write_cursormove(ctx, x, y, 0);
+	if (data->preview != NULL &&
+	    wp == data->wp &&
+	    sx <= screen_size_x(data->preview) &&
+	    sy <= screen_size_y(data->preview))
+		s = data->preview;
 	if (osx <= dsx && osy <= dsy)
-		screen_write_fast_copy(ctx, &wp->base, 0, wp->base.grid->hsize,
+		screen_write_fast_copy(ctx, s, 0, s->grid->hsize, sx, sy);
-		    sx, sy);
 	else
-		screen_write_preview(ctx, &wp->base, sx, sy);
+		screen_write_preview(ctx, s, sx, sy);
 	window_panes_draw_number(data, ctx, wp, pane, x, y, sx, sy);
 }
 
@@ -917,6 +941,8 @@ window_panes_init(struct window_mode_entry *wme, struct cmdq_item *item,
 		data->zoomed = -1;
 	else {
 		data->zoomed = (w->flags & WINDOW_ZOOMED);
+		if (!data->zoomed)
+			window_panes_set_preview(data);
 		if (!data->zoomed && window_zoom(wp) == 0)
 			server_redraw_window(w);
 	}
@@ -949,6 +975,10 @@ window_panes_free(struct window_mode_entry *wme)
 	if (data->state != NULL)
 		args_make_commands_free(data->state);
 	window_panes_free_areas(data);
+	if (data->preview != NULL) {
+		screen_free(data->preview);
+		free(data->preview);
+	}
 	screen_free(&data->screen);
 	free(data);
 }

window-visible.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: window-visible.c,v 1.4 2026/06/29 19:03:34 nicm Exp $ */
+/* $OpenBSD: window-visible.c,v 1.5 2026/07/19 17:25:38 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -81,7 +81,7 @@ window_visible_ranges(struct window_pane *base_wp, int px, int py, u_int width,
 	}
 
 	w = base_wp->window;
-	if ((u_int)py >= w->sy)
+	if ((u_int)py >= w->sy || (u_int)px >= w->sx)
 		goto empty;
 	if (px + width > w->sx)
 		width = w->sx - px;

window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: window.c,v 1.364 2026/07/15 13:02:33 nicm Exp $ */
+/* $OpenBSD: window.c,v 1.366 2026/07/19 19:53:11 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>