[gdb/tui] Fix wrapping strings

I noticed that after resizing to a narrow window, I got:
...
┌────────────────┐
│                │
│[ No Source Avail
able ]           │
│                │
└────────────────┘
...

Fix this by adding two new functions:
- tui_win_info::display_string (int y, int x, const char *str)
- tui_win_info::display_string (const char *str)
that make sure that borders are not overwritten, which get us instead:
...
┌────────────────┐
│                │
│[ No Source Avai│
│                │
│                │
└────────────────┘
...

Tested on x86_64-linux.

1 files changed, 15 insertions, 0 deletions

diff --git a/gdb/testsuite/lib/tuiterm.exp b/gdb/testsuite/lib/tuiterm.exp
index 854fde5..e668fe2 100644
--- a/gdb/testsuite/lib/tuiterm.exp
+++ b/gdb/testsuite/lib/tuiterm.exp
@@ -1102,6 +1102,21 @@ namespace eval Term {
 	}
     }
 
+    # Wait until a box appears at the given coordinates.
+    proc wait_for_box {test_name x y width height} {
+	while 1 {
+	    if { [accept_gdb_output] == 0 } {
+		return 0
+	    }
+
+	    set why [_check_box $x $y $width $height]
+	    if {$why == ""} {
+		pass $test_name
+		break
+	    }
+	}
+    }
+
     # Check whether the text contents of the terminal match the
     # regular expression.  Note that text styling is not considered.
     proc check_contents {test_name regexp} {