[PATCH] Truncate long TUI window titles

[Tom Tromey]

If a TUI window has a long title, it can overflow the title line.
This changes the TUI to use just the tail part of the title in this
case.

gdb/ChangeLog
2019-08-30  Tom Tromey  <tom@tromey.com>

	* tui/tui-wingeneral.c (box_win): Truncate long window titles.

gdb/testsuite/ChangeLog
2019-08-30  Tom Tromey  <tom@tromey.com>

	* gdb.tui/resize.exp: Remove setup_xfail.
	* gdb.tui/regs.exp: Remove setup_xfail.
	* gdb.tui/basic.exp: Remove setup_xfail.
---
 gdb/ChangeLog                    |  4 ++++
 gdb/testsuite/ChangeLog          |  6 ++++++
 gdb/testsuite/gdb.tui/basic.exp  |  6 ------
 gdb/testsuite/gdb.tui/regs.exp   |  3 ---
 gdb/testsuite/gdb.tui/resize.exp |  2 --
 gdb/tui/tui-wingeneral.c         | 16 +++++++++++++++-
 6 files changed, 25 insertions(+), 12 deletions(-)

diff --git a/gdb/testsuite/gdb.tui/basic.exp b/gdb/testsuite/gdb.tui/basic.exp
index f60011c386a..716c52f68a6 100644
--- a/gdb/testsuite/gdb.tui/basic.exp
+++ b/gdb/testsuite/gdb.tui/basic.exp
@@ -35,9 +35,6 @@ gdb_assert {![string match "No Source Available" $text]} \
 Term::command "list main"
 Term::check_contents "list main" "21 *return 0"
 
-# This check fails because the file name in the title overwrites the
-# box.
-setup_xfail *-*-*
 Term::check_box "source box" 0 0 80 15
 
 Term::command "layout asm"
@@ -48,8 +45,5 @@ Term::check_box "asm box" 0 0 80 15
 Term::command "layout split"
 Term::check_contents "split layout contents" "21 *return 0.*$hex <main>"
 
-# This check fails because the file name in the title overwrites the
-# box.
-setup_xfail *-*-*
 Term::check_box "source box in split layout" 0 0 80 8
 Term::check_box "asm box in split layout" 0 7 80 8
diff --git a/gdb/testsuite/gdb.tui/regs.exp b/gdb/testsuite/gdb.tui/regs.exp
index f17b1db8d40..1af943dd152 100644
--- a/gdb/testsuite/gdb.tui/regs.exp
+++ b/gdb/testsuite/gdb.tui/regs.exp
@@ -38,9 +38,6 @@ Term::check_contents "source at startup" ">|21 *return 0"
 
 Term::command "layout regs"
 Term::check_box "register box" 0 0 80 8
-# This check fails because the file name in the title overwrites the
-# box.
-setup_xfail *-*-*
 Term::check_box "source box in regs layout" 0 7 80 8
 
 set text [Term::get_line 1]
diff --git a/gdb/testsuite/gdb.tui/resize.exp b/gdb/testsuite/gdb.tui/resize.exp
index 8484e03c717..3b885e1198e 100644
--- a/gdb/testsuite/gdb.tui/resize.exp
+++ b/gdb/testsuite/gdb.tui/resize.exp
@@ -37,6 +37,4 @@ if {![Term::enter_tui]} {
 Term::check_contents "source at startup" ">|21 *return 0"
 
 Term::resize 40 90
-# Resizing seems to be somewhat broken.
-setup_xfail *-*-*
 Term::check_box "source box after resize" 0 0 90 23
diff --git a/gdb/tui/tui-wingeneral.c b/gdb/tui/tui-wingeneral.c
index f900eab0133..0291bf1a335 100644
--- a/gdb/tui/tui-wingeneral.c
+++ b/gdb/tui/tui-wingeneral.c
@@ -74,7 +74,21 @@ box_win (struct tui_win_info *win_info,
   box (win, tui_border_vline, tui_border_hline);
 #endif
   if (!win_info->title.empty ())
-    mvwaddstr (win, 0, 3, win_info->title.c_str ());
+    {
+      /* 2 chars for the corners, plus 3 more for the indent that's
+	 used below.  */
+      int max_len = win_info->width - 2 - 3;
+
+      if (win_info->title.size () <= max_len)
+	mvwaddstr (win, 0, 3, win_info->title.c_str ());
+      else
+	{
+	  std::string truncated
+	    = "..." + win_info->title.substr (win_info->title.size ()
+					      - max_len + 3);
+	  mvwaddstr (win, 0, 3, truncated.c_str ());
+	}
+    }
   wattroff (win, attrs);
 }
 
-- 
2.17.2