Change scroll/pane redraws to only redraw the single pane affected rather than

the entire window.

CHANGES

@@ -1,12 +1,12 @@
 02 April 2009
 
+* Change scroll/pane redraws to only redraw the single pane affected rather
+  than the entire window.
 * If redrawing the region would mean redrawing > half the pane, just schedule
   to redraw the entire window. Also add a flag to skip updating the window any
   further if it is scheduled to be redrawn. This has the effect of batching
   multiple redraws together.
 
-  Redraws should be moved to the pane level later.
-
 01 April 2009
 
 * Basic horizontal splitting and layout management. Still some redraw and other
@@ -1194,7 +1194,7 @@
   (including mutt, emacs). No status bar yet and no key remapping or other
   customisation.
 
-$Id: CHANGES,v 1.269 2009-04-02 20:30:17 nicm Exp $
+$Id: CHANGES,v 1.270 2009-04-02 21:08:13 nicm Exp $
 
  LocalWords:  showw utf UTF fulvio ciriaco joshe OSC APC gettime abc DEF OA clr
  LocalWords:  rivo nurges lscm Erdely eol smysession mysession ek dstname RB ms

screen-redraw.c

@@ -1,4 +1,4 @@
-/* $Id: screen-redraw.c,v 1.33 2009-04-01 21:09:01 nicm Exp $ */
+/* $Id: screen-redraw.c,v 1.34 2009-04-02 21:08:13 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -123,14 +123,24 @@ screen_redraw_screen(struct client *c)
 		}
 
 		/* Draw the pane. */
-		for (i = 0; i < sy; i++)
+		screen_redraw_pane(c, wp);
-			tty_draw_line(tty, s, i, wp->xoff, wp->yoff);
 	}
 	
 	/* Draw the status line. */
 	screen_redraw_status(c);
 }
 
+/* Draw a single pane. */
+void
+screen_redraw_pane(struct client *c, struct window_pane *wp)
+{
+	u_int	i;
+
+	for (i = 0; i < wp->sy; i++)
+		tty_draw_line(&c->tty, wp->screen, i, wp->xoff, wp->yoff);
+}
+	
+
 /* Draw the status line. */
 void
 screen_redraw_status(struct client *c)

server.c

@@ -1,4 +1,4 @@
-/* $Id: server.c,v 1.135 2009-04-02 20:30:20 nicm Exp $ */
+/* $Id: server.c,v 1.136 2009-04-02 21:08:13 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -481,6 +481,7 @@ void
 server_check_redraw(struct client *c)
 {
 	struct session		*s;
+	struct window_pane	*wp;
 	char		 	 title[512];
 	int		 	 flags, redraw;
 
@@ -520,6 +521,11 @@ server_check_redraw(struct client *c)
 		else
  			screen_redraw_screen(c);
 		c->flags &= ~CLIENT_STATUS;
+	} else {
+		TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
+			if (wp->flags & PANE_REDRAW)
+				screen_redraw_pane(c, wp);
+		}
 	}
 
 	if (c->flags & CLIENT_STATUS)
@@ -603,6 +609,8 @@ void
 server_fill_clients(struct pollfd **pfd)
 {
 	struct client		*c;
+	struct window		*w;
+	struct window_pane	*wp;
 	u_int		 	 i;
 
 	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
@@ -632,6 +640,20 @@ server_fill_clients(struct pollfd **pfd)
 		}
 		(*pfd)++;
 	}
+	
+	/*
+	 * Clear any window redraw flags (will have been redrawn as part of *
+	 * client).
+	 */
+	for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
+		w = ARRAY_ITEM(&windows, i);
+		if (w == NULL)
+			continue;
+		
+		w->flags &= ~WINDOW_REDRAW;
+		TAILQ_FOREACH(wp, &w->panes, entry)
+			wp->flags &= ~PANE_REDRAW;
+	}
 }
 
 /* Handle client pollfds. */
@@ -921,8 +943,6 @@ server_check_window(struct window *w)
 		wp = wq;
 	} 
 
-	w->flags &= ~WINDOW_REDRAW; /* redrawn as part of client */
-
 	if (!destroyed)
 		return;
 

tmux.h

@@ -1,4 +1,4 @@
-/* $Id: tmux.h,v 1.296 2009-04-02 20:30:20 nicm Exp $ */
+/* $Id: tmux.h,v 1.297 2009-04-02 21:08:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -656,6 +656,7 @@ struct window_pane {
 	int		 flags;
 #define PANE_HIDDEN 0x1
 #define PANE_RESTART 0x2
+#define PANE_REDRAW 0x4
 	
 	char		*cmd;
 	char		*cwd;
@@ -1466,6 +1467,7 @@ void	 screen_write_cell(
 
 /* screen-redraw.c */
 void	 screen_redraw_screen(struct client *);
+void	 screen_redraw_pane(struct client *, struct window_pane *);
 void	 screen_redraw_status(struct client *);
 
 /* screen.c */

tty.c

@@ -1,4 +1,4 @@
-/* $Id: tty.c,v 1.91 2009-04-02 20:30:23 nicm Exp $ */
+/* $Id: tty.c,v 1.92 2009-04-02 21:08:15 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -395,11 +395,9 @@ tty_redraw_region(struct tty *tty, struct window_pane *wp)
 	 * most cases, this is likely to be followed by some more scrolling -
 	 * without this, the entire pane ends up being redrawn many times which
 	 * can be much more data.
-	 *
-	 * XXX Should just schedule to redraw this pane...
 	 */
 	if (s->old_rupper - s->old_rlower >= screen_size_y(s) / 2) {
-		server_redraw_window(wp->window);
+		wp->flags |= PANE_REDRAW;
 		return;
 	}