Remove the layout undo/redo code which never really worked.

cmd-resize-pane.c

@@ -103,7 +103,6 @@ cmd_resize_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 		}
 	}
 
-	layout_list_add(wp->window);
 	if (args_has(self->args, 'L'))
 		layout_resize_pane(wp, LAYOUT_LEFTRIGHT, -adjust);
 	else if (args_has(self->args, 'R'))

cmd-select-layout.c

@@ -29,8 +29,8 @@ enum cmd_retval	 cmd_select_layout_exec(struct cmd *, struct cmd_ctx *);
 
 const struct cmd_entry cmd_select_layout_entry = {
 	"select-layout", "selectl",
-	"nprut:", 0, 1,
-	"[-npUu] " CMD_TARGET_WINDOW_USAGE " [layout-name]",
+	"npt:", 0, 1,
+	"[-np] " CMD_TARGET_WINDOW_USAGE " [layout-name]",
 	0,
 	cmd_select_layout_key_binding,
 	NULL,
@@ -76,14 +76,6 @@ cmd_select_layout_key_binding(struct cmd *self, int key)
 	case '5' | KEYC_ESCAPE:
 		self->args = args_create(1, "tiled");
 		break;
-	case 'u':
-		self->args = args_create(0);
-		args_set(self->args, 'u', NULL);
-		break;
-	case 'U':
-		self->args = args_create(0);
-		args_set(self->args, 'U', NULL);
-		break;
 	default:
 		self->args = args_create(0);
 		break;
@@ -110,21 +102,6 @@ cmd_select_layout_exec(struct cmd *self, struct cmd_ctx *ctx)
 	if (args_has(self->args, 'p'))
 		previous = 1;
 
-	layout_list_add(w);
-	if (args_has(self->args, 'U')) {
-		if ((layoutname = layout_list_redo(w)) == NULL) {
-			ctx->info(ctx, "no more layout history");
-			return (CMD_RETURN_ERROR);
-		}
-		goto set_layout;
-	} else if (args_has(self->args, 'u')) {
-		if ((layoutname = layout_list_undo(w)) == NULL) {
-			ctx->info(ctx, "no more layout history");
-			return (CMD_RETURN_ERROR);
-		}
-		goto set_layout;
-	}
-
 	if (next || previous) {
 		if (next)
 			layout = layout_set_next(wl->window);
@@ -146,16 +123,14 @@ cmd_select_layout_exec(struct cmd *self, struct cmd_ctx *ctx)
 		return (CMD_RETURN_NORMAL);
 	}
 
-	if (args->argc == 0)
-		return (CMD_RETURN_NORMAL);
-	layoutname = args->argv[0];
-
-set_layout:
-	if (layout_parse(wl->window, layoutname) == -1) {
-		ctx->error(ctx, "can't set layout: %s", layoutname);
-		return (CMD_RETURN_ERROR);
+	if (args->argc != 0) {
+		layoutname = args->argv[0];
+		if (layout_parse(wl->window, layoutname) == -1) {
+			ctx->error(ctx, "can't set layout: %s", layoutname);
+			return (CMD_RETURN_ERROR);
+		}
+		server_redraw_window(wl->window);
+		ctx->info(ctx, "arranging in: %s", layoutname);
 	}
-	server_redraw_window(wl->window);
-	ctx->info(ctx, "arranging in: %s", layoutname);
 	return (CMD_RETURN_NORMAL);
 }

key-bindings.c

@@ -130,7 +130,6 @@ key_bindings_init(void)
 		{ '?', 			  0, &cmd_list_keys_entry },
 		{ 'D',			  0, &cmd_choose_client_entry },
 		{ 'L',			  0, &cmd_switch_client_entry },
-		{ 'U',			  1, &cmd_select_layout_entry },
 		{ '[', 			  0, &cmd_copy_mode_entry },
 		{ '\'',			  0, &cmd_command_prompt_entry },
 		{ '\002', /* C-b */	  0, &cmd_send_prefix_entry },
@@ -149,7 +148,6 @@ key_bindings_init(void)
 		{ 'r', 			  0, &cmd_refresh_client_entry },
 		{ 's', 			  0, &cmd_choose_tree_entry },
 		{ 't', 			  0, &cmd_clock_mode_entry },
-		{ 'u',			  1, &cmd_select_layout_entry },
 		{ 'w', 			  0, &cmd_choose_window_entry },
 		{ 'x', 			  0, &cmd_confirm_before_entry },
 		{ '{',			  0, &cmd_swap_pane_entry },

layout.c

@@ -19,7 +19,6 @@
 #include <sys/types.h>
 
 #include <stdlib.h>
-#include <string.h>
 
 #include "tmux.h"
 
@@ -747,74 +746,3 @@ layout_close_pane(struct window_pane *wp)
 	}
 	notify_window_layout_changed(wp->window);
 }
-
-/* Add layout to list. */
-void
-layout_list_add(struct window *w)
-{
-	struct last_layout	*ll, *ll_last;
-	char			*layout;
-	u_int			 limit;
-
-	layout = layout_dump(w);
-
-	ll_last = w->layout_list_last;
-	if (ll_last != NULL && strcmp(ll_last->layout, layout) == 0) {
-		free(layout);
-		return;
-	}
-
-	ll = xmalloc(sizeof *ll);
-	ll->layout = layout;
-	if (ll_last == NULL)
-		TAILQ_INSERT_TAIL(&w->layout_list, ll, entry);
-	else
-		TAILQ_INSERT_AFTER(&w->layout_list, ll_last, ll, entry);
-	w->layout_list_size++;
-	w->layout_list_last = ll;
-
-	limit = options_get_number(&w->options, "layout-history-limit");
-	while (w->layout_list_size > limit) {
-		ll = TAILQ_LAST(&w->layout_list, last_layouts);
-		if (ll == w->layout_list_last)
-			ll = TAILQ_FIRST(&w->layout_list);
-
-		TAILQ_REMOVE(&w->layout_list, ll, entry);
-		w->layout_list_size--;
-
-		free(ll->layout);
-		free(ll);
-	}
-}
-
-/* Apply next layout from list. */
-const char *
-layout_list_redo(struct window *w)
-{
-	struct last_layout	*ll, *ll_last;
-
-	ll_last = w->layout_list_last;
-	if (ll_last == NULL)
-		return (NULL);
-	ll = TAILQ_NEXT(ll_last, entry);
-	if (ll == NULL)
-		return (NULL);
-	w->layout_list_last = ll;
-	return (ll->layout);
-}
-
-/* Apply previous layout from list. */
-const char *
-layout_list_undo(struct window *w)
-{
-	struct last_layout	*ll, *ll_last;
-
-	ll_last = w->layout_list_last;
-	if (ll_last == NULL)
-		return (NULL);
-	ll = TAILQ_PREV(ll_last, last_layouts, entry);
-	if (ll == NULL)
-		return (NULL);
-	w->layout_list_last = ll;
-	return (ll->layout);
-}

options-table.c

@@ -517,13 +517,6 @@ const struct options_table_entry window_options_table[] = {
 	  .default_num = 0
 	},
 
-	{ .name = "layout-history-limit",
-	  .type = OPTIONS_TABLE_NUMBER,
-	  .minimum = 1,
-	  .maximum = USHRT_MAX,
-	  .default_num = 20
-	},
-
 	{ .name = "main-pane-height",
 	  .type = OPTIONS_TABLE_NUMBER,
 	  .minimum = 1,

tmux.1

@@ -1601,7 +1601,7 @@ lower) with
 .Fl U
 or downward (numerically higher).
 .It Xo Ic select-layout
-.Op Fl npUu
+.Op Fl np
 .Op Fl t Ar target-window
 .Op Ar layout-name
 .Xc
@@ -1618,13 +1618,6 @@ are equivalent to the
 and
 .Ic previous-layout
 commands.
-.Pp
-.Fl U
-and
-.Fl u
-step forward and back through previous layouts, up to the maximum set by the
-.Ic layout-history-limit
-option.
 .It Xo Ic select-pane
 .Op Fl lDLRU
 .Op Fl t Ar target-pane
@@ -2677,13 +2670,6 @@ or
 .Ar height .
 A value of zero restores the default unlimited setting.
 .Pp
-.It Ic layout-history-limit Ar limit
-Set the number of previous layouts stored for recovery with
-.Ic select-layout
-.Fl U
-and
-.Fl u .
-.Pp
 .It Ic main-pane-height Ar height
 .It Ic main-pane-width Ar width
 Set the width or height of the main (left or top) pane in the

tmux.h

@@ -974,13 +974,6 @@ struct window_pane {
 TAILQ_HEAD(window_panes, window_pane);
 RB_HEAD(window_pane_tree, window_pane);
 
-/* Window last layout. */
-struct last_layout {
-	char	*layout;
-
-	TAILQ_ENTRY(last_layout) entry;
-};
-
 /* Window structure. */
 struct window {
 	u_int		 id;
@@ -994,9 +987,6 @@ struct window {
 
 	int		 lastlayout;
 	struct layout_cell *layout_root;
-	TAILQ_HEAD(last_layouts, last_layout) layout_list;
-	u_int		 layout_list_size;
-	struct last_layout *layout_list_last;
 
 	u_int		 sx;
 	u_int		 sy;
@@ -2179,8 +2169,7 @@ u_int		 layout_count_cells(struct layout_cell *);
 struct layout_cell *layout_create_cell(struct layout_cell *);
 void		 layout_free_cell(struct layout_cell *);
 void		 layout_print_cell(struct layout_cell *, const char *, u_int);
-void		 layout_destroy_cell(
-		     struct layout_cell *, struct layout_cell **);
+void		 layout_destroy_cell(struct layout_cell *, struct layout_cell **);
 void		 layout_set_size(
 		     struct layout_cell *, u_int, u_int, u_int, u_int);
 void		 layout_make_leaf(
@@ -2201,9 +2190,6 @@ void		 layout_assign_pane(struct layout_cell *, struct window_pane *);
 struct layout_cell *layout_split_pane(
 		     struct window_pane *, enum layout_type, int, int);
 void		 layout_close_pane(struct window_pane *);
-void		 layout_list_add(struct window *);
-const char	*layout_list_redo(struct window *);
-const char	*layout_list_undo(struct window *);
 
 /* layout-custom.c */
 char		*layout_dump(struct window *);

window.c

@@ -286,7 +286,6 @@ window_create1(u_int sx, u_int sy)
 
 	w->lastlayout = -1;
 	w->layout_root = NULL;
-	TAILQ_INIT(&w->layout_list);
 
 	w->sx = sx;
 	w->sy = sy;