Fix of mouse and ca capabilities check.

Based on patch from Andrey V. Malyshev <amal krasn ru>
http://mail.gnome.org/archives/mc-devel/2005-November/msg00052.html

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

lib/tty/tty-internal.h

@@ -36,6 +36,10 @@ extern gboolean ugly_line_drawing;
 /* The mouse is currently: TRUE - enabled, FALSE - disabled */
 extern gboolean mouse_enabled;
 
+/* terminal ca capabilities */
+extern char *smcup;
+extern char *rmcup;
+
 /*** declarations of public functions ************************************************************/
 
 char *mc_tty_normalize_from_utf8 (const char *);

lib/tty/tty.c

@@ -298,8 +298,19 @@ tty_init_xterm_support (gboolean is_xterm)
 
     termvalue = getenv ("TERM");
 
-    /* Check mouse capabilities */
+    /* Check mouse and ca capabilities */
+    /* terminfo/termcap structures have been already initialized,
+       in slang_init() or/and init_curses()  */
+    /* Check terminfo at first, then check termcap */
+    xmouse_seq = tty_tgetstr ("kmous");
+    if (xmouse_seq == NULL)
         xmouse_seq = tty_tgetstr ("Km");
+    smcup = tty_tgetstr ("smcup");
+    if (smcup == NULL)
+        smcup = tty_tgetstr ("ti");
+    rmcup = tty_tgetstr ("rmcup");
+    if (rmcup == NULL)
+        rmcup = tty_tgetstr ("te");
 
     if (strcmp (termvalue, "cygwin") == 0)
     {

lib/tty/win.c

@@ -34,6 +34,7 @@
 
 #include "lib/global.h"
 #include "lib/util.h"           /* is_printable() */
+#include "tty-internal.h"
 #include "tty.h"                /* tty_gotoyx, tty_print_char */
 #include "win.h"
 
@@ -43,6 +44,9 @@
 /* It is used by function view_other_cmd() */
 gboolean xterm_flag = FALSE;
 
+char *smcup = NULL;
+char *rmcup = NULL;
+
 /*** file scope macro definitions ****************************************************************/
 
 /*** file scope type declarations ****************************************************************/
@@ -92,7 +96,7 @@ anything_ready (void)
 void
 do_enter_ca_mode (void)
 {
-    if (xterm_flag)
+    if (xterm_flag && smcup != NULL)
     {
         fprintf (stdout, /* ESC_STR ")0" */ ESC_STR "7" ESC_STR "[?47h");
         fflush (stdout);
@@ -104,7 +108,7 @@ do_enter_ca_mode (void)
 void
 do_exit_ca_mode (void)
 {
-    if (xterm_flag)
+    if (xterm_flag && rmcup != NULL)
     {
         fprintf (stdout, ESC_STR "[?47l" ESC_STR "8" ESC_STR "[m");
         fflush (stdout);