Make synchronize-panes a pane option and add -U flag to set-option to

unset an option on all panes. GitHub issue 2491 from Rostislav Nesin.

cmd-set-option.c

@@ -33,8 +33,8 @@ const struct cmd_entry cmd_set_option_entry = {
 	.name = "set-option",
 	.alias = "set",
 
-	.args = { "aFgopqst:uw", 1, 2 },
+	.args = { "aFgopqst:uUw", 1, 2 },
-	.usage = "[-aFgopqsuw] " CMD_TARGET_PANE_USAGE " option [value]",
+	.usage = "[-aFgopqsuUw] " CMD_TARGET_PANE_USAGE " option [value]",
 
 	.target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
 
@@ -74,8 +74,9 @@ cmd_set_option_exec(struct cmd *self, struct cmdq_item *item)
 	struct args			*args = cmd_get_args(self);
 	int				 append = args_has(args, 'a');
 	struct cmd_find_state		*target = cmdq_get_target(item);
+	struct window_pane		*loop;
 	struct options			*oo;
-	struct options_entry		*parent, *o;
+	struct options_entry		*parent, *o, *po;
 	char				*name, *argument, *value = NULL, *cause;
 	int				 window, idx, already, error, ambiguous;
 	int				 scope;
@@ -148,7 +149,19 @@ cmd_set_option_exec(struct cmd *self, struct cmdq_item *item)
 	}
 
 	/* Change the option. */
-	if (args_has(args, 'u')) {
+	if (args_has(args, 'U') && scope == OPTIONS_TABLE_WINDOW) {
+		TAILQ_FOREACH(loop, &target->w->panes, entry) {
+			po = options_get_only(loop->options, name);
+			if (po == NULL)
+				continue;
+			if (options_remove_or_default(po, idx, &cause) != 0) {
+				cmdq_error(item, "%s", cause);
+				free(cause);
+				goto fail;
+			}
+		}
+	}
+	if (args_has(args, 'u') || args_has(args, 'U')) {
 		if (o == NULL)
 			goto out;
 		if (options_remove_or_default(o, idx, &cause) != 0) {

format.c

@@ -3085,7 +3085,7 @@ format_defaults_pane(struct format_tree *ft, struct window_pane *wp)
 	format_add_cb(ft, "pane_in_mode", format_cb_pane_in_mode);
 
 	format_add(ft, "pane_synchronized", "%d",
-	    !!options_get_number(w->options, "synchronize-panes"));
+	    !!options_get_number(wp->options, "synchronize-panes"));
 	if (wp->searchstr != NULL)
 		format_add(ft, "pane_search_string", "%s", wp->searchstr);
 

options-table.c

@@ -958,7 +958,7 @@ const struct options_table_entry options_table[] = {
 
 	{ .name = "synchronize-panes",
 	  .type = OPTIONS_TABLE_FLAG,
-	  .scope = OPTIONS_TABLE_WINDOW,
+	  .scope = OPTIONS_TABLE_WINDOW|OPTIONS_TABLE_PANE,
 	  .default_num = 0,
 	  .text = "Whether typing should be sent to all panes simultaneously."
 	},

tmux.1

@@ -3136,7 +3136,7 @@ abc123
 Commands which set options are as follows:
 .Bl -tag -width Ds
 .It Xo Ic set-option
-.Op Fl aFgopqsuw
+.Op Fl aFgopqsuUw
 .Op Fl t Ar target-pane
 .Ar option Ar value
 .Xc
@@ -3169,6 +3169,11 @@ flag unsets an option, so a session inherits the option from the global
 options (or with
 .Fl g ,
 restores a global option to the default).
+.Fl U
+unsets an option (like
+.Fl u )
+but if the option is a pane option also unsets the option on any panes in the
+window.
 .Ar value
 depends on the option and may be a number, a string, or a flag (on, off, or
 omitted to toggle).
@@ -4062,12 +4067,6 @@ see the
 section.
 Attributes are ignored.
 .Pp
-.It Xo Ic synchronize-panes
-.Op Ic on | off
-.Xc
-Duplicate input to any pane to all other panes in the same window (only
-for panes that are not in any special mode).
-.Pp
 .It Ic window-status-activity-style Ar style
 Set status line style for windows with an activity alert.
 For how to specify
@@ -4190,6 +4189,12 @@ The pane may be reactivated with the
 .Ic respawn-pane
 command.
 .Pp
+.It Xo Ic synchronize-panes
+.Op Ic on | off
+.Xc
+Duplicate input to all other panes in the same window where this option is also
+on (only for panes that are not in any mode).
+.Pp
 .It Ic window-active-style Ar style
 Set the pane style when it is the active pane.
 For how to specify

window.c

@@ -1145,12 +1145,27 @@ window_pane_reset_mode_all(struct window_pane *wp)
 		window_pane_reset_mode(wp);
 }
 
+static void
+window_pane_copy_key(struct window_pane *wp, key_code key)
+{
+ 	struct window_pane	*loop;
+
+	TAILQ_FOREACH(loop, &wp->window->panes, entry) {
+		if (loop != wp &&
+		    TAILQ_EMPTY(&loop->modes) &&
+		    loop->fd != -1 &&
+		    (~loop->flags & PANE_INPUTOFF) &&
+		    window_pane_visible(loop) &&
+		    options_get_number(loop->options, "synchronize-panes"))
+			input_key_pane(loop, key, NULL);
+	}
+}
+
 int
 window_pane_key(struct window_pane *wp, struct client *c, struct session *s,
     struct winlink *wl, key_code key, struct mouse_event *m)
 {
 	struct window_mode_entry	*wme;
-	struct window_pane		*wp2;
 
 	if (KEYC_IS_MOUSE(key) && m == NULL)
 		return (-1);
@@ -1172,16 +1187,8 @@ window_pane_key(struct window_pane *wp, struct client *c, struct session *s,
 
 	if (KEYC_IS_MOUSE(key))
 		return (0);
-	if (options_get_number(wp->window->options, "synchronize-panes")) {
+	if (options_get_number(wp->options, "synchronize-panes"))
-		TAILQ_FOREACH(wp2, &wp->window->panes, entry) {
+		window_pane_copy_key(wp, key);
-			if (wp2 != wp &&
-			    TAILQ_EMPTY(&wp2->modes) &&
-			    wp2->fd != -1 &&
-			    (~wp2->flags & PANE_INPUTOFF) &&
-			    window_pane_visible(wp2))
-				input_key_pane(wp2, key, NULL);
-		}
-	}
 	return (0);
 }