New window options: force-width and force-height. This will force a window to

an arbitrary width and height (0 for the default unlimited). This is neat for
  emacs which doesn't have a sensible way to force hard wrapping at 80
  columns. Also, don't try to be clever and use clr_eol when redrawing the
  whole screen, it causes trouble since the redraw functions are used to draw
  the blank areas too.

CHANGES

@@ -1,5 +1,13 @@
 14 June 2008
 
+* New window options: force-width and force-height. This will force a window
+  to an arbitrary width and height (0 for the default unlimited). This is
+  neat for emacs which doesn't have a sensible way to force hard wrapping at 80
+  columns. Also, don't try to be clever and use clr_eol when redrawing the
+  whole screen, it causes trouble since the redraw functions are used to draw
+  the blank areas too.
+* Clear the blank area below windows properly when they are smaller than client,
+  also add an indicator line to show the vertical limit.
 * Don't die on empty strings in config file, reported by Will Maier.
 
 08 June 2008
@@ -464,4 +472,4 @@
   (including mutt, emacs). No status bar yet and no key remapping or other
   customisation.
 
-$Id: CHANGES,v 1.118 2008-06-14 08:11:16 nicm Exp $
+$Id: CHANGES,v 1.119 2008-06-14 16:47:20 nicm Exp $

TODO

@@ -75,4 +75,7 @@
 - test and fix wsvt25
 - activity/bell should be per-window not per-link? what if it is cur win in
   session not being watched?
-- empty strings in config causes crash (lt_kije)
+- man page:
+      set-window-option
+      explanation of -t format
+      config file

cmd-set-window-option.c

@@ -1,4 +1,4 @@
-/* $Id: cmd-set-window-option.c,v 1.6 2008-06-06 20:02:27 nicm Exp $ */
+/* $Id: cmd-set-window-option.c,v 1.7 2008-06-14 16:47:20 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -166,6 +166,34 @@ cmd_set_window_option_exec(struct cmd *self, struct cmd_ctx *ctx)
 		}
 
 		recalculate_sizes();
+	} else if (strcmp(data->option, "force-width") == 0) {
+		if (data->value == NULL || number == -1) {
+			ctx->error(ctx, "invalid value");
+			return;
+		}
+		if (errstr != NULL) {
+			ctx->error(ctx, "force-width %s", errstr);
+			return;
+		}
+		if (number == 0)
+			wl->window->limitx = UINT_MAX;
+		else
+			wl->window->limitx = number;
+		recalculate_sizes();
+	} else if (strcmp(data->option, "force-height") == 0) {
+		if (data->value == NULL || number == -1) {
+			ctx->error(ctx, "invalid value");
+			return;
+		}
+		if (errstr != NULL) {
+			ctx->error(ctx, "force-height %s", errstr);
+			return;
+		}
+		if (number == 0)
+			wl->window->limity = UINT_MAX;
+		else
+			wl->window->limity = number;
+		recalculate_sizes();
 	} else {
 		ctx->error(ctx, "unknown option: %s", data->option);
 		return;

resize.c

@@ -1,4 +1,4 @@
-/* $Id: resize.c,v 1.14 2008-06-14 12:05:06 nicm Exp $ */
+/* $Id: resize.c,v 1.15 2008-06-14 16:47:20 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -114,6 +114,11 @@ recalculate_sizes(void)
 		}
 		w->flags &= ~WINDOW_HIDDEN;
 
+		if (ssx > w->limitx)
+			ssx = w->limitx;
+		if (ssy > w->limity)
+			ssy = w->limity;
+
 		if (screen_size_x(&w->base) == ssx &&
 		    screen_size_y(&w->base) == ssy)
 			continue;

screen-redraw.c

@@ -1,4 +1,4 @@
-/* $Id: screen-redraw.c,v 1.5 2008-06-14 12:05:06 nicm Exp $ */
+/* $Id: screen-redraw.c,v 1.6 2008-06-14 16:47:20 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -181,19 +181,12 @@ screen_redraw_area(
 void
 screen_redraw_lines(struct screen_redraw_ctx *ctx, u_int py, u_int ny)
 {
-	u_int	i, cx, sx;
-
-	sx = screen_size_x(ctx->s);
-	for (i = py; i < py + ny; i++) {
-		cx = ctx->s->grid_size[screen_y(ctx->s, i)];
-		if (ctx->s->sel.flag || sx < 5 || cx >= sx - 5) {
-			screen_redraw_area(ctx, 0, i, screen_size_x(ctx->s), 1);
-			continue;
-		}
-		screen_redraw_area(ctx, 0, i, cx, 1);
-		screen_redraw_move_cursor(ctx, cx, i);
-		screen_redraw_set_attributes(
-		    ctx, SCREEN_DEFATTR, SCREEN_DEFCOLR);
-		ctx->write(ctx->data, TTY_CLEARENDOFLINE);
-	}
+	screen_redraw_area(ctx, 0, py, screen_size_x(ctx->s), py + ny);
+}
+
+/* Draw set of columns. */
+void
+screen_redraw_columns(struct screen_redraw_ctx *ctx, u_int px, u_int nx)
+{
+	screen_redraw_area(ctx, px, 0, px + nx, screen_size_y(ctx->s));
 }

server-fn.c

@@ -1,4 +1,4 @@
-/* $Id: server-fn.c,v 1.40 2008-06-07 07:13:08 nicm Exp $ */
+/* $Id: server-fn.c,v 1.41 2008-06-14 16:47:20 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -183,6 +183,6 @@ server_write_message(struct client *c, const char *fmt, ...)
 		screen_redraw_stop(&ctx);
 	} else {
 		screen_redraw_stop(&ctx);
-		status_write_client(c);
+		server_status_client(c);
 	}
 }

server.c

@@ -1,4 +1,4 @@
-/* $Id: server.c,v 1.62 2008-06-14 12:05:06 nicm Exp $ */
+/* $Id: server.c,v 1.63 2008-06-14 16:47:20 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -312,31 +312,34 @@ server_check_redraw(struct client *c)
 	if (c->flags & CLIENT_REDRAW) {
 		sx = screen_size_x(c->session->curw->window->screen);
 		sy = screen_size_y(c->session->curw->window->screen);
-		if (sy < yy) {
+		if (sx < xx || sy < yy) {
 			/*
-			 * Fake up a blank(ish) screen and use it. NOTE: because
-			 * this uses tty_write_client but doesn't write the
-			 * client's screen, this can't use anything which
-			 * relies on cursor position. This is icky and might
-			 * break if we try to optimise redrawing later :-/.
+			 * Fake up a blank(ish) screen and use it to draw the 
+			 * empty regions. NOTE: because this uses
+			 * tty_write_client but doesn't write the client's
+			 * screen, this can't use anything which relies on
+			 * cursor position.
 			 */
 			screen_create(&screen, xx, yy, 0);
-			screen_fill_area(&screen, 0, 0, xx, yy, ' ', 0, 0x70);
-			screen_fill_area(&screen, 0, sy, sx, 1, '-', 0, 0x70);
-
 			screen_redraw_start(&ctx, &screen, tty_write_client, c);
-			screen_redraw_lines(&ctx, sy, yy - sy);
+			if (sx < xx)
+				screen_redraw_columns(&ctx, sx, xx - sx);
+			if (sy < yy)  {
+				screen_fill_area(&screen, 
+				    0, sy, xx, 1, '-', 0, 0x70);
+				screen_redraw_lines(&ctx, sy, yy - sy);
+			}
 			screen_redraw_stop(&ctx);
-
 			screen_destroy(&screen);
 		}
 
 		screen_redraw_start_client(&ctx, c);
 		screen_redraw_lines(&ctx, 0, screen_size_y(ctx.s));
 		screen_redraw_stop(&ctx);
-		status_write_client(c);	
+
+		status_redraw(c);
 	} else if (c->flags & CLIENT_STATUS)
-		status_write_client(c);	
+		status_redraw(c);
 
 	c->flags &= ~(CLIENT_CLEAR|CLIENT_REDRAW|CLIENT_STATUS);
 }

status.c

@@ -1,4 +1,4 @@
-/* $Id: status.c,v 1.24 2008-06-07 07:27:28 nicm Exp $ */
+/* $Id: status.c,v 1.25 2008-06-14 16:47:20 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -24,18 +24,17 @@
 
 #include "tmux.h"
 
-void printflike3 status_print(struct buffer *, size_t *, const char *, ...);
-
+/* Draw status for client on the last lines of given context. */
 void
-status_write_client(struct client *c)
+status_redraw(struct client *c)
 {
 	struct screen_redraw_ctx	ctx;
-	struct winlink	       	       *wl;
-	char				flag, *left, *right;
-	char			        lbuf[BUFSIZ], rbuf[BUFSIZ];
+	struct winlink		       *wl;
+	char		 		flag, *left, *right;
+	char				lbuf[BUFSIZ], rbuf[BUFSIZ];
 	size_t				llen, rlen;
-	u_char				scolour;
-	u_int				slines;
+	u_char		 		scolour;
+	u_int		 		slines;
 
 	scolour = options_get_number(&c->session->options, "status-colour");
 	slines = options_get_number(&c->session->options, "status-lines");
@@ -78,10 +77,10 @@ status_write_client(struct client *c)
 			screen_redraw_set_attributes(&ctx, 0, scolour);
 		screen_redraw_write_string(&ctx, " ");
 		
-		if (ctx.s->cx > screen_size_x(ctx.s) - rlen)
+		if (ctx.s->cx > c->sx - rlen)
 			break;
 	}
-	while (ctx.s->cx < screen_size_x(ctx.s) - rlen) {
+	while (ctx.s->cx < c->sx - rlen) {
 		ctx.write(ctx.data, TTY_CHARACTER, ' ');
 		ctx.s->cx++;
 	}
@@ -89,46 +88,8 @@ status_write_client(struct client *c)
 	screen_redraw_move_cursor(&ctx, 0, c->sy - slines);
 	screen_redraw_write_string(&ctx, "%s ", lbuf);
 
-	screen_redraw_move_cursor(
-	    &ctx, screen_size_x(ctx.s) - rlen, c->sy - slines);
+	screen_redraw_move_cursor(&ctx, c->sx - rlen, c->sy - slines);
 	screen_redraw_write_string(&ctx, " %s", rbuf);
 
 	screen_redraw_stop(&ctx);
 }
-
-void
-status_write_window(struct window *w)
-{
-	struct client	*c;
-	u_int		 i;
-
-	if (w->flags & WINDOW_HIDDEN)
-		return;
-
-	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
-		c = ARRAY_ITEM(&clients, i);
-		if (c == NULL || c->session == NULL)
-			continue;
-		if (c->session->curw->window != w)
-			continue;
-
-		status_write_client(c);
-	}
-}
-
-void
-status_write_session(struct session *s)
-{
-	struct client	*c;
-	u_int		 i;
-
-	if (s->flags & SESSION_UNATTACHED)
-		return;
-
-	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
-		c = ARRAY_ITEM(&clients, i);
-		if (c == NULL || c->session != s)
-			continue;
-		status_write_client(c);
-	}
-}

tmux.h

@@ -1,4 +1,4 @@
-/* $Id: tmux.h,v 1.140 2008-06-14 12:05:06 nicm Exp $ */
+/* $Id: tmux.h,v 1.141 2008-06-14 16:47:20 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -529,6 +529,9 @@ struct window {
 #define WINDOW_MONITOR 0x8
 #define WINDOW_AGGRESSIVE 0x10
 
+	u_int		 limitx;
+	u_int		 limity;
+
 	struct screen	*screen;
 	struct screen	 base;
 
@@ -918,9 +921,7 @@ void	 server_status_window(struct window *);
 void printflike2 server_write_message(struct client *, const char *, ...);
 
 /* status.c */
-void	 status_write_client(struct client *);
-void	 status_write_session(struct session *);
-void	 status_write_window(struct window *);
+void	 status_redraw(struct client *c);
 
 /* resize.c */
 void	 recalculate_sizes(void);
@@ -1005,6 +1006,7 @@ void	screen_redraw_cell(struct screen_redraw_ctx *, u_int, u_int);
 void	screen_redraw_area(
     	    struct screen_redraw_ctx *, u_int, u_int, u_int, u_int);
 void	screen_redraw_lines(struct screen_redraw_ctx *, u_int, u_int);
+void	screen_redraw_columns(struct screen_redraw_ctx *, u_int, u_int);
 
 /* screen.c */
 const char *screen_colourstring(u_char);

window.c

@@ -1,4 +1,4 @@
-/* $Id: window.c,v 1.40 2008-06-04 20:17:25 nicm Exp $ */
+/* $Id: window.c,v 1.41 2008-06-14 16:47:20 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -202,6 +202,7 @@ window_create(const char *name,
 	w->out = buffer_create(BUFSIZ);
 	w->mode = NULL;
 	w->flags = 0;
+	w->limitx = w->limity = UINT_MAX;
 	screen_create(&w->base, sx, sy, hlimit);
 	w->screen = &w->base;
 	input_init(w);