(redisplay_internal): If considering all windows on all

frames, update the display for each frame as soon as possible,
instead of first building all desired matrices for all frames, and
then updating them all.
(try_cursor_movement): Handle case that last_cursor.vpos is -1.

src/ChangeLog

+2000-08-25  Gerd Moellmann  <gerd@gnu.org>
+
+	* xdisp.c (redisplay_internal): If considering all windows on all
+	frames, update the display for each frame as soon as possible,
+	instead of first building all desired matrices for all frames, and
+	then updating them all.
+	(try_cursor_movement): Handle case that last_cursor.vpos is -1.
+
 2000-08-24  Gerd Moellmann  <gerd@gnu.org>
 
 	* bytecode.c (mark_byte_stack): Add a comment.

src/xdisp.c

@@ -7513,7 +7513,7 @@ redisplay_internal (preserve_echo_area)
   ++redisplaying_p;
   
  retry:
-
+  pause = 0;
   reconsider_clip_changes (w, current_buffer);
 
   /* If new fonts have been loaded that make a glyph matrix adjustment
@@ -7867,9 +7867,9 @@ redisplay_internal (preserve_echo_area)
   ++clear_face_cache_count;
 
   
-  /* Build desired matrices.  If consider_all_windows_p is non-zero,
-     do it for all windows on all frames.  Otherwise do it for
-     selected_window, only.  */
+  /* Build desired matrices, and update the display.  If
+     consider_all_windows_p is non-zero, do it for all windows on all
+     frames.  Otherwise do it for selected_window, only.  */
 
   if (consider_all_windows_p)
     {
@@ -7889,6 +7889,7 @@ redisplay_internal (preserve_echo_area)
       FOR_EACH_FRAME (tail, frame)
 	{
 	  struct frame *f = XFRAME (frame);
+	  
 	  if (FRAME_WINDOW_P (f) || f == sf)
 	    {
 	      /* Mark all the scroll bars to be removed; we'll redeem
@@ -7903,81 +7904,60 @@ redisplay_internal (preserve_echo_area)
 		 nuked should now go away.  */
 	      if (judge_scroll_bars_hook)
 		(*judge_scroll_bars_hook) (f);
+
+	      /* If fonts changed, display again.  */
+	      if (fonts_changed_p)
+		goto retry;
+	      
+	      if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f))
+		{
+		  /* See if we have to hscroll.  */
+		  if (hscroll_windows (f->root_window))
+		    goto retry;
+
+		  /* Prevent various kinds of signals during display
+		     update.  stdio is not robust about handling
+		     signals, which can cause an apparent I/O
+		     error.  */
+		  if (interrupt_input)
+		    unrequest_sigio ();
+		  stop_polling ();
+
+		  /* Update the display.  */
+		  set_window_update_flags (XWINDOW (f->root_window), 1);
+		  pause |= update_frame (f, 0, 0);
+		  if (pause)
+		    break;
+
+		  mark_window_display_accurate (f->root_window, 1);
+		  if (frame_up_to_date_hook)
+		    frame_up_to_date_hook (f);
+		}
 	    }
 	}
     }
-  else if (FRAME_VISIBLE_P (sf)
-	   && !FRAME_OBSCURED_P (sf))
-    redisplay_window (selected_window, 1);
+  else if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf))
+    {
+      Lisp_Object mini_window;
+      struct frame *mini_frame;
 
+      redisplay_window (selected_window, 1);
   
-  /* Compare desired and current matrices, perform output.  */
-  
-update:
+      /* Compare desired and current matrices, perform output.  */
+    update:
   
-  /* If fonts changed, display again.  */
-  if (fonts_changed_p)
-    goto retry;
-
-  /* Prevent various kinds of signals during display update.
-     stdio is not robust about handling signals,
-     which can cause an apparent I/O error.  */
-  if (interrupt_input)
-    unrequest_sigio ();
-  stop_polling ();
-
-  if (consider_all_windows_p)
-    {
-      Lisp_Object tail;
-      struct frame *f;
-      int hscrolled_p;
-
-      pause = 0;
-      hscrolled_p = 0;
-
-      /* See if we have to hscroll.  */
-      for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail))
-	if (FRAMEP (XCAR (tail)))
-	  {
-	    f = XFRAME (XCAR (tail));
-	    
-	    if ((FRAME_WINDOW_P (f)
-		 || f == sf)
-		&& FRAME_VISIBLE_P (f)
-		&& !FRAME_OBSCURED_P (f)
-		&& hscroll_windows (f->root_window))
-	      hscrolled_p = 1;
-	  }
-
-      if (hscrolled_p)
+      /* If fonts changed, display again.  */
+      if (fonts_changed_p)
 	goto retry;
 
-      for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail))
-	{
-	  if (!FRAMEP (XCAR (tail)))
-	    continue;
-
-	  f = XFRAME (XCAR (tail));
+      /* Prevent various kinds of signals during display update.
+	 stdio is not robust about handling signals,
+	 which can cause an apparent I/O error.  */
+      if (interrupt_input)
+	unrequest_sigio ();
+      stop_polling ();
 
-	  if ((FRAME_WINDOW_P (f) || f == sf)
-	      && FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f))
-	    {
-	      /* Mark all windows as to be updated.  */
-	      set_window_update_flags (XWINDOW (f->root_window), 1);
-	      pause |= update_frame (f, 0, 0);
-	      if (!pause)
-		{
-		  mark_window_display_accurate (f->root_window, 1);
-		  if (frame_up_to_date_hook != 0)
-		    (*frame_up_to_date_hook) (f);
-		}
-	    }
-	}
-    }
-  else
-    {
-      if (FRAME_VISIBLE_P (sf)
-	  && !FRAME_OBSCURED_P (sf))
+      if (FRAME_VISIBLE_P (sf) && !FRAME_OBSCURED_P (sf))
 	{
 	  if (hscroll_windows (selected_window))
 	    goto retry;
@@ -7985,29 +7965,22 @@ redisplay_internal (preserve_echo_area)
 	  XWINDOW (selected_window)->must_be_updated_p = 1;
 	  pause = update_frame (sf, 0, 0);
 	}
-      else
-	pause = 0;
 
       /* We may have called echo_area_display at the top of this
 	 function.  If the echo area is on another frame, that may
 	 have put text on a frame other than the selected one, so the
 	 above call to update_frame would not have caught it.  Catch
 	 it here.  */
-      {
-	Lisp_Object mini_window;
-	struct frame *mini_frame;
-
-	mini_window = FRAME_MINIBUF_WINDOW (sf);
-	mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window)));
+      mini_window = FRAME_MINIBUF_WINDOW (sf);
+      mini_frame = XFRAME (WINDOW_FRAME (XWINDOW (mini_window)));
 	
-	if (mini_frame != sf && FRAME_WINDOW_P (mini_frame))
-	  {
-	    XWINDOW (mini_window)->must_be_updated_p = 1;
-	    pause |= update_frame (mini_frame, 0, 0);
-	    if (!pause && hscroll_windows (mini_window))
-	      goto retry;
-	  }
-      }
+      if (mini_frame != sf && FRAME_WINDOW_P (mini_frame))
+	{
+	  XWINDOW (mini_window)->must_be_updated_p = 1;
+	  pause |= update_frame (mini_frame, 0, 0);
+	  if (!pause && hscroll_windows (mini_window))
+	    goto retry;
+	}
     }
 
   /* If display was paused because of pending input, make sure we do a
@@ -8843,7 +8816,8 @@ try_cursor_movement (window, startp, scroll_step)
 
       /* Start with the row the cursor was displayed during the last
 	 not paused redisplay.  Give up if that row is not valid.  */
-      if (w->last_cursor.vpos >= w->current_matrix->nrows)
+      if (w->last_cursor.vpos < 0
+	  || w->last_cursor.vpos >= w->current_matrix->nrows)
 	rc = -1;
       else
 	{