Add new tile-pane and float-pane commands.

Makefile.am

@@ -147,6 +147,7 @@ dist_tmux_SOURCES = \
 	cmd-source-file.c \
 	cmd-split-window.c \
 	cmd-swap-pane.c \
+	cmd-tile-float-pane.c \
 	cmd-swap-window.c \
 	cmd-switch-client.c \
 	cmd-unbind-key.c \

cmd.c

@@ -69,6 +69,7 @@ extern const struct cmd_entry cmd_load_buffer_entry;
 extern const struct cmd_entry cmd_lock_client_entry;
 extern const struct cmd_entry cmd_lock_server_entry;
 extern const struct cmd_entry cmd_lock_session_entry;
+extern const struct cmd_entry cmd_float_pane_entry;
 extern const struct cmd_entry cmd_minimise_pane_entry;
 extern const struct cmd_entry cmd_move_pane_entry;
 extern const struct cmd_entry cmd_move_window_entry;
@@ -118,6 +119,7 @@ extern const struct cmd_entry cmd_swap_window_entry;
 extern const struct cmd_entry cmd_switch_client_entry;
 extern const struct cmd_entry cmd_unbind_key_entry;
 extern const struct cmd_entry cmd_unlink_window_entry;
+extern const struct cmd_entry cmd_tile_pane_entry;
 extern const struct cmd_entry cmd_unminimise_pane_entry;
 extern const struct cmd_entry cmd_wait_for_entry;
 
@@ -164,6 +166,7 @@ const struct cmd_entry *cmd_table[] = {
 	&cmd_lock_client_entry,
 	&cmd_lock_server_entry,
 	&cmd_lock_session_entry,
+	&cmd_float_pane_entry,
 	&cmd_minimise_pane_entry,
 	&cmd_move_pane_entry,
 	&cmd_move_window_entry,
@@ -213,6 +216,7 @@ const struct cmd_entry *cmd_table[] = {
 	&cmd_switch_client_entry,
 	&cmd_unbind_key_entry,
 	&cmd_unlink_window_entry,
+	&cmd_tile_pane_entry,
 	&cmd_unminimise_pane_entry,
 	&cmd_wait_for_entry,
 	NULL

key-bindings.c

@@ -364,6 +364,7 @@ key_bindings_init(void)
 		"bind -N 'Kill current window' & { confirm-before -p\"kill-window #W? (y/n)\" kill-window }",
 		"bind -N 'Prompt for window index to select' \"'\" { command-prompt -T window-target -pindex { select-window -t ':%%' } }",
 		"bind -N 'New floating pane' * { new-pane }",
+		"bind -N 'Toggle pane between floating and tiled' @ { if -F '#{pane_floating_flag}' { tile-pane } { float-pane } }",
 		"bind -N 'Switch to previous client' ( { switch-client -p }",
 		"bind -N 'Switch to next client' ) { switch-client -n }",
 		"bind -N 'Rename current window' , { command-prompt -I'#W' { rename-window -- '%%' } }",

screen-redraw.c

@@ -730,8 +730,7 @@ screen_redraw_draw_pane_status(struct screen_redraw_ctx *ctx)
 			width = size - x;
 		}
 
-		r = tty_check_overlay_range(&c->tty, x, yoff, width);
-		r = screen_redraw_get_visible_ranges(wp, x, yoff, width, r);
+		r = screen_redraw_get_visible_ranges(wp, x, yoff, width, NULL);
 
 		if (ctx->statustop)
 			yoff += ctx->statuslines;

tmux.1

@@ -292,6 +292,8 @@ Rename the current session.
 Split the current pane into two, left and right.
 .It &
 Kill the current window.
+.It @
+Toggle the current pane between floating and tiled.
 .It \[aq]
 Prompt for a window index to select.
 .It \&(
@@ -2971,6 +2973,41 @@ The default is
 zooms the pane.
 .Pp
 This command works only if at least one client is attached.
+.Tg floatp
+.It Xo Ic float\-pane
+.Op Fl h Ar height
+.Op Fl w Ar width
+.Op Fl x Ar x
+.Op Fl y Ar y
+.Op Fl t Ar target\-pane
+.Xc
+Lift
+.Ar target\-pane
+out of the tiled layout and make it a floating pane.
+The
+.Fl w
+and
+.Fl h
+options set the width and height of the floating pane in columns and lines
+respectively; the default is half the window width and height.
+The
+.Fl x
+and
+.Fl y
+options set the position of the upper-left corner of the pane;
+if omitted, new floating panes are cascaded from the top-left of the window.
+If
+.Fl x ,
+.Fl y ,
+.Fl w ,
+and
+.Fl h
+are all omitted and the pane was previously returned to the tiled layout
+with
+.Ic tile\-pane ,
+its last floating position and size are restored.
+The pane must not already be floating or minimised, and the window must not
+be zoomed.
 .Tg joinp
 .It Xo Ic join\-pane
 .Op Fl bdfhv
@@ -3782,6 +3819,20 @@ is omitted and a marked pane is present (see
 .Ic select\-pane
 .Fl m ) ,
 the window containing the marked pane is used rather than the current window.
+.Tg tilep
+.It Xo Ic tile\-pane
+.Op Fl t Ar target\-pane
+.Xc
+Insert a floating
+.Ar target\-pane
+back into the tiled layout.
+The pane is placed by splitting the active tiled pane (or the most recently
+active tiled pane, or any visible tiled pane if none is active).
+The current floating position and size are saved so they can be restored by
+a subsequent
+.Ic float\-pane
+command with no geometry options.
+The pane must be floating and the window must not be zoomed.
 .Tg unlinkw
 .It Xo Ic unlink\-window
 .Op Fl k

tmux.h

@@ -1231,6 +1231,13 @@ struct window_pane {
 #define PANE_FLOATING 0x10000
 #define PANE_MINIMISED 0x20000
 #define PANE_ZOOMED 0x40000
+#define PANE_SAVED_FLOAT 0x80000	/* saved_float_* fields are valid */
+
+	/* Last floating position/size, saved when the pane is tiled. */
+	int		 saved_float_xoff;
+	int		 saved_float_yoff;
+	u_int		 saved_float_sx;
+	u_int		 saved_float_sy;
 
 	u_int		 sb_slider_y;
 	u_int		 sb_slider_h;