core: set terminal title using curses emulation of termcap (WIP)

This is work in progress and it does not even compile because of the include of
term.h.

src/gui/curses/gui-curses-window.c

@@ -2568,8 +2568,8 @@ gui_window_set_title (const char *title)
 {
     char *new_title, *envterm, *envshell, *shell, *shellname;
 
-    envterm = getenv ("TERM");
-    if (!envterm)
+    /* check if term has status line support */
+    if (!tgetflag ("hs"))
         return;
 
     new_title = (title && title[0]) ?
@@ -2577,57 +2577,8 @@ gui_window_set_title (const char *title)
     if (!new_title)
         return;
 
-    if (strcmp (envterm, "sun-cmd") == 0)
-    {
-        printf ("\033]l%s\033\\", new_title);
-    }
-    else if (strcmp (envterm, "hpterm") == 0)
-    {
-        printf ("\033&f0k%dD%s", (int)(strlen (new_title) + 1), new_title);
-    }
-    /* the following terminals support the xterm escape codes */
-    else if ((strncmp (envterm, "xterm", 5) == 0)
-             || (strncmp (envterm, "rxvt", 4) == 0)
-             || (strncmp (envterm, "alacritty", 9) == 0)
-             || (strcmp (envterm, "Eterm") == 0)
-             || (strcmp (envterm, "aixterm") == 0)
-             || (strcmp (envterm, "iris-ansi") == 0)
-             || (strcmp (envterm, "dtterm") == 0))
-    {
-        printf ("\33]0;%s\7", new_title);
-    }
-    else if ((strncmp (envterm, "screen", 6) == 0)
-             || (strncmp (envterm, "tmux", 4) == 0))
-    {
-        if (title && title[0])
-        {
-            printf ("\033k%s\033\\", new_title);
-        }
-        else
-        {
-            envshell = getenv ("SHELL");
-            if (envshell)
-            {
-                shell  = strdup (envshell);
-                if (shell)
-                {
-                    shellname = basename (shell);
-                    printf ("\033k%s\033\\", (shellname) ? shellname : shell);
-                    free (shell);
-                }
-                else
-                {
-                    printf ("\033k%s\033\\", envterm);
-                }
-            }
-            else
-            {
-                printf ("\033k%s\033\\", envterm);
-            }
-        }
-        /* trying to set the title of a backgrounded xterm like terminal */
-        printf ("\33]0;%s\7", new_title);
-    }
+    printf ("%s%s%s", tgetstr ("ts"), new_title, tgetstr ("fs"));
+
     fflush (stdout);
 
     free (new_title);

src/gui/curses/gui-curses.h

@@ -28,10 +28,13 @@
 #define NCURSES_WIDECHAR 1
 #ifdef HAVE_NCURSESW_CURSES_H
 #include <ncursesw/ncurses.h>
+#include <term.h>
 #elif HAVE_NCURSES_H
 #include <ncurses.h>
+#include <term.h>
 #else
 #include <curses.h>
+#include <term.h>
 #endif /* HAVE_NCURSESW_CURSES_H */
 #endif /* WEECHAT_HEADLESS */