Re: GDB 9 TUI mode broken

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sat, 22 Feb 2020 20:23:29 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> CC: midenok@gmail.com, gdb-patches@sourceware.org
> 
> > Your patch looks reasonable to me.
> 
> Thanks, I will finish it off as suggested, and submit a full patch for
> review.

The below seems to DTRT.  OK to commit?

2020-02-22  Eli Zaretskii  <eliz@gnu.org>

	* tui/tui-win.c (new_height_ok, tui_adjust_win_heights): Rename
	'locator' to 'status_line', to better match terminology in the
	manual.
	(tui_adjust_win_heights): Resize the status_line window to match
	the new dimensions of the command and source/disassembly windows.
	Reported by Aleksey Midenkov <midenok@gmail.com>.

--- gdb/tui/tui-win.c~0	2020-02-08 14:50:14.000000000 +0200
+++ gdb/tui/tui-win.c	2020-02-22 20:39:24.847375000 +0200
@@ -1067,7 +1067,7 @@ tui_adjust_win_heights (struct tui_win_i
 	{
 	  int diff;
 	  struct tui_win_info *win_info;
-	  struct tui_locator_window *locator = tui_locator_win_info_ptr ();
+	  struct tui_locator_window *status_line = tui_locator_win_info_ptr ();
 	  enum tui_layout_type cur_layout = tui_current_layout ();
 	  int width = tui_term_width ();
 
@@ -1077,21 +1077,30 @@ tui_adjust_win_heights (struct tui_win_i
 	    {
 	      struct tui_win_info *src_win_info;
 
-	      primary_win_info->resize (new_height, width,
-					0, primary_win_info->origin.y);
 	      if (primary_win_info->type == CMD_WIN)
 		{
 		  win_info = *(tui_source_windows ().begin ());
 		  src_win_info = win_info;
+		  primary_win_info->resize (new_height, width,
+					    0,
+					    primary_win_info->origin.y + diff);
+		  win_info->resize (win_info->height + diff, width,
+				    0, win_info->origin.y);
+		  status_line->resize (1, width, 0,
+				       win_info->origin.y + win_info->height);
 		}
 	      else
 		{
 		  win_info = tui_win_list[CMD_WIN];
 		  src_win_info = primary_win_info;
-		}
+		  primary_win_info->resize (new_height, width,
+					    0, primary_win_info->origin.y);
 	      win_info->resize (win_info->height + diff, width,
-				0, win_info->origin.y);
-	      TUI_CMD_WIN->origin.y = locator->origin.y + 1;
+				    0, win_info->origin.y - diff);
+		  status_line->resize (1, width, 0,
+				       primary_win_info->origin.y
+				       + primary_win_info->height);
+		}
 	      if ((src_win_info->type == SRC_WIN
 		   || src_win_info->type == DISASSEM_WIN))
 		{
@@ -1122,7 +1131,7 @@ tui_adjust_win_heights (struct tui_win_i
 	      if (primary_win_info == TUI_CMD_WIN)
 		{ /* Split the change in height across the 1st & 2nd
 		     windows, adjusting them as well.  */
-		  /* Subtract the locator.  */
+		  /* Subtract the status_line.  */
 		  int first_split_diff = diff / 2;
 		  int second_split_diff = first_split_diff;
 
@@ -1160,12 +1169,12 @@ tui_adjust_win_heights (struct tui_win_i
 		  second_win->resize (second_win->height + second_split_diff,
 				      width,
 				      0, first_win->height - 1);
-		  locator->resize (1, width,
+		  status_line->resize (1, width,
 				   0, (second_win->origin.y
 				       + second_win->height + 1));
 
 		  TUI_CMD_WIN->resize (new_height, width,
-				       0, locator->origin.y + 1);
+				       0, status_line->origin.y + 1);
 		}
 	      else
 		{
@@ -1196,15 +1205,16 @@ tui_adjust_win_heights (struct tui_win_i
 		  else
 		    second_win->resize (second_win->height, width,
 					0, first_win->height - 1);
-		  locator->resize (1, width,
+		  status_line->resize (1, width,
 				   0, (second_win->origin.y
 				       + second_win->height + 1));
-		  TUI_CMD_WIN->origin.y = locator->origin.y + 1;
+		  TUI_CMD_WIN->origin.y = status_line->origin.y + 1;
 		  if ((TUI_CMD_WIN->height + diff) < 1)
-		    TUI_CMD_WIN->resize (1, width, 0, locator->origin.y + 1);
+		    TUI_CMD_WIN->resize (1, width, 0,
+					 status_line->origin.y + 1);
 		  else
 		    TUI_CMD_WIN->resize (TUI_CMD_WIN->height + diff, width,
-					 0, locator->origin.y + 1);
+					 0, status_line->origin.y + 1);
 		}
 	      if (src1 != nullptr && src1->content.empty ())
 		src1->erase_source_content ();
@@ -1272,13 +1282,14 @@ new_height_ok (struct tui_win_info *prim
 	  /* We could simply add all the heights to obtain the same
 	     result but below is more explicit since we subtract 1 for
 	     the line that the first and second windows share, and add
-	     one for the locator.  */
+	     one for the status_line.  */
 	  total_height = cur_total_height =
 	    (first_win->height + second_win->height - 1)
-	    + TUI_CMD_WIN->height + 1;	/* Locator. */
+	    + TUI_CMD_WIN->height + 1;	/* Status_line. */
 	  if (primary_win_info == TUI_CMD_WIN)
 	    {
-	      /* Locator included since first & second win share a line.  */
+	      /* Status_line included since first and second window
+		 share a line.  */
 	      ok = ((first_win->height +
 		     second_win->height + diff) >=
 		    (MIN_WIN_HEIGHT * 2)