Infrastructure for drawing status lines of more than one line in height,

still only one is allowed but this lets tmux draw bigger ones.

resize.c

@@ -49,11 +49,11 @@ recalculate_sizes(void)
 	struct client		*c;
 	struct window		*w;
 	struct window_pane	*wp;
-	u_int			 ssx, ssy, has, limit;
+	u_int			 ssx, ssy, has, limit, lines;
-	int			 flag, has_status, is_zoomed, forced;
+	int			 flag, is_zoomed, forced;
 
 	RB_FOREACH(s, sessions, &sessions) {
-		has_status = options_get_number(s->options, "status");
+		lines = status_line_size(s);
 
 		s->attached = 0;
 		ssx = ssy = UINT_MAX;
@@ -66,10 +66,14 @@ recalculate_sizes(void)
 			if (c->session == s) {
 				if (c->tty.sx < ssx)
 					ssx = c->tty.sx;
-				if (has_status &&
+				c->flags &= ~CLIENT_STATUSOFF;
+				if (lines != 0 && lines + PANE_MINIMUM > c->tty.sy)
+					c->flags |= CLIENT_STATUSOFF;
+				if ((~c->flags & CLIENT_STATUSOFF) &&
 				    !(c->flags & CLIENT_CONTROL) &&
-				    c->tty.sy > 1 && c->tty.sy - 1 < ssy)
+				    c->tty.sy > lines &&
-					ssy = c->tty.sy - 1;
+				    c->tty.sy - lines < ssy)
+					ssy = c->tty.sy - lines;
 				else if (c->tty.sy < ssy)
 					ssy = c->tty.sy;
 				s->attached++;
@@ -81,8 +85,8 @@ recalculate_sizes(void)
 		}
 		s->flags &= ~SESSION_UNATTACHED;
 
-		if (has_status && ssy == 0)
+		if (lines != 0 && ssy == 0)
-			ssy = 1;
+			ssy = lines;
 
 		if (s->sx == ssx && s->sy == ssy)
 			continue;

screen-redraw.c

@@ -33,11 +33,11 @@ static int 	screen_redraw_make_pane_status(struct client *, struct window *,
 		    struct window_pane *);
 static void	screen_redraw_draw_pane_status(struct client *, int);
 
-static void	screen_redraw_draw_borders(struct client *, int, int, u_int);
+static void	screen_redraw_draw_borders(struct client *, int, u_int, u_int);
-static void	screen_redraw_draw_panes(struct client *, u_int);
+static void	screen_redraw_draw_panes(struct client *, u_int, u_int);
-static void	screen_redraw_draw_status(struct client *, u_int);
+static void	screen_redraw_draw_status(struct client *, u_int, u_int);
 static void	screen_redraw_draw_number(struct client *, struct window_pane *,
-		    u_int);
+		    u_int, u_int);
 
 #define CELL_INSIDE 0
 #define CELL_LEFTRIGHT 1
@@ -377,36 +377,38 @@ screen_redraw_screen(struct client *c, int draw_panes, int draw_status,
 	struct tty		*tty = &c->tty;
 	struct window		*w = c->session->curw->window;
 	struct options		*wo = w->options;
-	u_int			 top;
+	u_int			 top, lines;
-	int	 		 status, pane_status, spos;
+	int	 		 position, pane_status;
 
-	/* Suspended clients should not be updated. */
 	if (c->flags & CLIENT_SUSPENDED)
 		return;
 
-	/* Get status line, er, status. */
+	if (c->flags & CLIENT_STATUSOFF)
-	spos = options_get_number(oo, "status-position");
+		lines = 0;
-	if (c->message_string != NULL || c->prompt_string != NULL)
-		status = 1;
 	else
-		status = options_get_number(oo, "status");
+		lines = status_line_size(c->session);
-	top = 0;
+	if (c->message_string != NULL || c->prompt_string != NULL)
-	if (status && spos == 0)
+		lines = (lines == 0) ? 1 : lines;
+
+	position = options_get_number(oo, "status-position");
+	if (lines != 0 && position == 0)
 		top = 1;
-	if (!status)
+	else
+		top = 0;
+
+	if (lines == 0)
 		draw_status = 0;
 
-	/* Draw the elements. */
 	if (draw_borders) {
 		pane_status = options_get_number(wo, "pane-border-status");
-		screen_redraw_draw_borders(c, status, pane_status, top);
+		screen_redraw_draw_borders(c, pane_status, lines, top);
 		if (pane_status != CELL_STATUS_OFF)
 			screen_redraw_draw_pane_status(c, pane_status);
 	}
 	if (draw_panes)
-		screen_redraw_draw_panes(c, top);
+		screen_redraw_draw_panes(c, lines, top);
 	if (draw_status)
-		screen_redraw_draw_status(c, top);
+		screen_redraw_draw_status(c, lines, top);
 	tty_reset(tty);
 }
 
@@ -421,7 +423,7 @@ screen_redraw_pane(struct client *c, struct window_pane *wp)
 
 	yoff = wp->yoff;
 	if (status_at_line(c) == 0)
-		yoff++;
+		yoff += status_line_size(c->session);
 
 	log_debug("%s: redraw pane %%%u (at %u,%u)", c->name, wp->id,
 	    wp->xoff, yoff);
@@ -433,7 +435,7 @@ screen_redraw_pane(struct client *c, struct window_pane *wp)
 
 /* Draw the borders. */
 static void
-screen_redraw_draw_borders(struct client *c, int status, int pane_status,
+screen_redraw_draw_borders(struct client *c, int pane_status, u_int lines,
     u_int top)
 {
 	struct session		*s = c->session;
@@ -449,7 +451,7 @@ screen_redraw_draw_borders(struct client *c, int status, int pane_status,
 	const char		*tmp;
 	size_t			 msglen = 0;
 
-	small = (tty->sy - status + top > w->sy) || (tty->sx > w->sx);
+	small = (tty->sy - lines + top > w->sy) || (tty->sx > w->sx);
 	if (small) {
 		flags = w->flags & (WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT);
 		if (flags == (WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT))
@@ -458,18 +460,20 @@ screen_redraw_draw_borders(struct client *c, int status, int pane_status,
 			tmp = "force-width";
 		else if (flags == WINDOW_FORCEHEIGHT)
 			tmp = "force-height";
+		else if (c->flags & CLIENT_STATUSOFF)
+			tmp = "status line";
 		else
 			tmp = "a smaller client";
 		xsnprintf(msg, sizeof msg, "(size %ux%u from %s)",
 		    w->sx, w->sy, tmp);
 		msglen = strlen(msg);
 
-		if (tty->sy - 1 - status + top > w->sy && tty->sx >= msglen) {
+		if (tty->sy - 1 - lines + top > w->sy && tty->sx >= msglen) {
 			msgx = tty->sx - msglen;
-			msgy = tty->sy - 1 - status + top;
+			msgy = tty->sy - 1 - lines + top;
 		} else if (tty->sx - w->sx > msglen) {
 			msgx = tty->sx - msglen;
-			msgy = tty->sy - 1 - status + top;
+			msgy = tty->sy - 1 - lines + top;
 		} else
 			small = 0;
 	}
@@ -483,7 +487,7 @@ screen_redraw_draw_borders(struct client *c, int status, int pane_status,
 	memcpy(&m_active_gc, &active_gc, sizeof m_active_gc);
 	m_active_gc.attr ^= GRID_ATTR_REVERSE;
 
-	for (j = 0; j < tty->sy - status; j++) {
+	for (j = 0; j < tty->sy - lines; j++) {
 		for (i = 0; i < tty->sx; i++) {
 			type = screen_redraw_check_cell(c, i, j, pane_status,
 			    &wp);
@@ -505,7 +509,10 @@ screen_redraw_draw_borders(struct client *c, int status, int pane_status,
 				tty_attributes(tty, &active_gc, NULL);
 			else
 				tty_attributes(tty, &other_gc, NULL);
-			tty_cursor(tty, i, top + j);
+			if (top)
+				tty_cursor(tty, i, lines + j);
+			else
+				tty_cursor(tty, i, j);
 			tty_putc(tty, CELL_BORDERS[type]);
 		}
 	}
@@ -520,38 +527,47 @@ screen_redraw_draw_borders(struct client *c, int status, int pane_status,
 
 /* Draw the panes. */
 static void
-screen_redraw_draw_panes(struct client *c, u_int top)
+screen_redraw_draw_panes(struct client *c, u_int lines, u_int top)
 {
 	struct window		*w = c->session->curw->window;
 	struct tty		*tty = &c->tty;
 	struct window_pane	*wp;
-	u_int		 	 i;
+	u_int		 	 i, y;
+
+	if (top)
+		y = lines;
+	else
+		y = 0;
 
 	TAILQ_FOREACH(wp, &w->panes, entry) {
 		if (!window_pane_visible(wp))
 			continue;
 		for (i = 0; i < wp->sy; i++)
-			tty_draw_pane(tty, wp, i, wp->xoff, top + wp->yoff);
+			tty_draw_pane(tty, wp, i, wp->xoff, y + wp->yoff);
 		if (c->flags & CLIENT_IDENTIFY)
-			screen_redraw_draw_number(c, wp, top);
+			screen_redraw_draw_number(c, wp, lines, top);
 	}
 }
 
 /* Draw the status line. */
 static void
-screen_redraw_draw_status(struct client *c, u_int top)
+screen_redraw_draw_status(struct client *c, u_int lines, u_int top)
 {
 	struct tty	*tty = &c->tty;
+	u_int		 i, y;
 
 	if (top)
-		tty_draw_line(tty, NULL, &c->status, 0, 0, 0);
+		y = 0;
 	else
-		tty_draw_line(tty, NULL, &c->status, 0, 0, tty->sy - 1);
+		y = tty->sy - lines;
+	for (i = 0; i < lines; i++)
+		tty_draw_line(tty, NULL, &c->status, i, 0, y);
 }
 
 /* Draw number on a pane. */
 static void
-screen_redraw_draw_number(struct client *c, struct window_pane *wp, u_int top)
+screen_redraw_draw_number(struct client *c, struct window_pane *wp,
+    u_int lines, u_int top)
 {
 	struct tty		*tty = &c->tty;
 	struct session		*s = c->session;
@@ -576,7 +592,7 @@ screen_redraw_draw_number(struct client *c, struct window_pane *wp, u_int top)
 	xoff = wp->xoff; yoff = wp->yoff;
 
 	if (top)
-		yoff++;
+		yoff += lines;
 
 	if (wp->sx < len * 6 || wp->sy < 5) {
 		tty_cursor(tty, xoff + px - len / 2, yoff + py);

server-client.c

@@ -1201,7 +1201,7 @@ server_client_reset_state(struct client *c)
 	struct window_pane	*wp = w->active, *loop;
 	struct screen		*s = wp->screen;
 	struct options		*oo = c->session->options;
-	int			 status, mode, o;
+	int			 lines, mode;
 
 	if (c->flags & (CLIENT_CONTROL|CLIENT_SUSPENDED))
 		return;
@@ -1209,13 +1209,14 @@ server_client_reset_state(struct client *c)
 	tty_region_off(&c->tty);
 	tty_margin_off(&c->tty);
 
-	status = options_get_number(oo, "status");
+	if (status_at_line(c) != 0)
-	if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
+		lines = 0;
+	else
+		lines = status_line_size(c->session);
+	if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - lines)
 		tty_cursor(&c->tty, 0, 0);
-	else {
+	else
-		o = status && options_get_number(oo, "status-position") == 0;
+		tty_cursor(&c->tty, wp->xoff + s->cx, lines + wp->yoff + s->cy);
-		tty_cursor(&c->tty, wp->xoff + s->cx, o + wp->yoff + s->cy);
-	}
 
 	/*
 	 * Set mouse mode if requested. To support dragging, always use button

status.c

@@ -210,9 +210,24 @@ status_at_line(struct client *c)
 {
 	struct session	*s = c->session;
 
+	if (c->flags & CLIENT_STATUSOFF)
+		return (-1);
 	if (s->statusat != 1)
 		return (s->statusat);
-	return (c->tty.sy - 1);
+	return (c->tty.sy - status_line_size(s));
+}
+
+/*
+ * Get size of status line for session. 0 means off. Note that status line may
+ * be forced off for an individual client if it is too small (the
+ * CLIENT_STATUSOFF flag is set for this).
+ */
+u_int
+status_line_size(struct session *s)
+{
+	if (s->statusat == -1)
+		return (0);
+	return (1);
 }
 
 /* Retrieve options for left string. */
@@ -296,7 +311,7 @@ status_redraw(struct client *c)
 	time_t			 t;
 	char			*left, *right;
 	const char		*sep;
-	u_int			 offset, needed;
+	u_int			 offset, needed, lines;
 	u_int			 wlstart, wlwidth, wlavailable, wloffset, wlsize;
 	size_t			 llen, rlen, seplen;
 	int			 larrow, rarrow;
@@ -309,7 +324,8 @@ status_redraw(struct client *c)
 	}
 
 	/* No status line? */
-	if (c->tty.sy == 0 || !options_get_number(s->options, "status"))
+	lines = status_line_size(s);
+	if (c->tty.sy == 0 || lines == 0)
 		return (1);
 	left = right = NULL;
 	larrow = rarrow = 0;
@@ -322,14 +338,13 @@ status_redraw(struct client *c)
 
 	/* Create the target screen. */
 	memcpy(&old_status, &c->status, sizeof old_status);
-	screen_init(&c->status, c->tty.sx, 1, 0);
+	screen_init(&c->status, c->tty.sx, lines, 0);
 	screen_write_start(&ctx, NULL, &c->status);
-	for (offset = 0; offset < c->tty.sx; offset++)
+	screen_write_clearscreen(&ctx, stdgc.bg);
-		screen_write_putc(&ctx, &stdgc, ' ');
 	screen_write_stop(&ctx);
 
-	/* If the height is one line, blank status line. */
+	/* If the height is too small, blank status line. */
-	if (c->tty.sy <= 1)
+	if (c->tty.sy < lines)
 		goto out;
 
 	/* Work out left and right strings. */
@@ -637,11 +652,17 @@ status_message_redraw(struct client *c)
 	struct screen		        old_status;
 	size_t			        len;
 	struct grid_cell		gc;
+	u_int				lines;
 
 	if (c->tty.sx == 0 || c->tty.sy == 0)
 		return (0);
 	memcpy(&old_status, &c->status, sizeof old_status);
+
+	lines = status_line_size(c->session);
+	if (lines <= 1)
 		screen_init(&c->status, c->tty.sx, 1, 0);
+	else
+		screen_init(&c->status, c->tty.sx, lines, 0);
 
 	len = screen_write_strlen("%s", c->message_string);
 	if (len > c->tty.sx)
@@ -650,12 +671,9 @@ status_message_redraw(struct client *c)
 	style_apply(&gc, s->options, "message-style");
 
 	screen_write_start(&ctx, NULL, &c->status);
-
+	screen_write_clearscreen(&ctx, gc.bg);
-	screen_write_cursormove(&ctx, 0, 0);
+	screen_write_cursormove(&ctx, 0, lines - 1);
 	screen_write_nputs(&ctx, len, &gc, "%s", c->message_string);
-	for (; len < c->tty.sx; len++)
-		screen_write_putc(&ctx, &gc, ' ');
-
 	screen_write_stop(&ctx);
 
 	if (grid_compare(c->status.grid, old_status.grid) == 0) {
@@ -782,12 +800,24 @@ status_prompt_redraw(struct client *c)
 	struct session		*s = c->session;
 	struct screen		 old_status;
 	u_int			 i, offset, left, start, pcursor, pwidth, width;
+	u_int			 lines;
+	size_t			 len, off;
 	struct grid_cell	 gc, cursorgc;
 
 	if (c->tty.sx == 0 || c->tty.sy == 0)
 		return (0);
 	memcpy(&old_status, &c->status, sizeof old_status);
+
+	lines = status_line_size(c->session);
+	if (lines <= 1)
 		screen_init(&c->status, c->tty.sx, 1, 0);
+	else
+		screen_init(&c->status, c->tty.sx, lines, 0);
+
+	len = screen_write_strlen("%s", c->prompt_string);
+	if (len > c->tty.sx)
+		len = c->tty.sx;
+	off = 0;
 
 	if (c->prompt_mode == PROMPT_COMMAND)
 		style_apply(&gc, s->options, "message-command-style");
@@ -802,11 +832,10 @@ status_prompt_redraw(struct client *c)
 		start = c->tty.sx;
 
 	screen_write_start(&ctx, NULL, &c->status);
-	screen_write_cursormove(&ctx, 0, 0);
+	screen_write_clearscreen(&ctx, gc.bg);
+	screen_write_cursormove(&ctx, 0, lines - 1);
 	screen_write_nputs(&ctx, start, &gc, "%s", c->prompt_string);
-	while (c->status.cx < screen_size_x(&c->status))
+	screen_write_cursormove(&ctx, start, lines - 1);
-		screen_write_putc(&ctx, &gc, ' ');
-	screen_write_cursormove(&ctx, start, 0);
 
 	left = c->tty.sx - start;
 	if (left == 0)

tmux.h

@@ -1381,6 +1381,7 @@ struct client {
 #define CLIENT_DOUBLECLICK 0x100000
 #define CLIENT_TRIPLECLICK 0x200000
 #define CLIENT_SIZECHANGED 0x400000
+#define CLIENT_STATUSOFF 0x800000
 	int		 flags;
 	struct key_table *keytable;
 
@@ -1928,6 +1929,7 @@ void	 status_timer_start(struct client *);
 void	 status_timer_start_all(void);
 void	 status_update_saved(struct session *s);
 int	 status_at_line(struct client *);
+u_int	 status_line_size(struct session *);
 struct window *status_get_window_at(struct client *, u_int);
 int	 status_redraw(struct client *);
 void printflike(2, 3) status_message_set(struct client *, const char *, ...);

tty.c

@@ -1038,7 +1038,7 @@ tty_write(void (*cmdfn)(struct tty *, const struct tty_ctx *),
 		ctx->xoff = wp->xoff;
 		ctx->yoff = wp->yoff;
 		if (status_at_line(c) == 0)
-			ctx->yoff++;
+			ctx->yoff += status_line_size(c->session);
 
 		cmdfn(&c->tty, ctx);
 	}