Ticket #???? (clock support)

Initial step for the clock support. Based on Olegarch (olegarch@linuxinside.com) patches.

Signed-off-by: Ilia Maslakov <il.smind@gmail.com>

lib/global.c

@@ -1,3 +1,4 @@
+
 /*
    Global structure for some library-related variables
 
@@ -46,6 +47,17 @@
 
 /*** global variables ****************************************************************************/
 
+#ifdef SIGACT
+struct sigaction clock_new, clock_old, clock_dummy;
+#else
+void (*clock_alarm) (int);
+#endif
+
+unsigned int clock_remain;
+int op_clock_type = HOUR_MIN_SEC;
+int clock_ticks;
+int clock_type;
+
 /* *INDENT-OFF* */
 mc_global_t mc_global = {
     .mc_run_mode = MC_RUN_FULL,

lib/global.h

@@ -146,6 +146,10 @@
 
 /*** enums ***************************************************************************************/
 
+#define NO_CLOCK      0
+#define HOUR_MIN_SEC  1
+#define HOUR_MIN      2
+
 /* run mode and params */
 typedef enum
 {
@@ -274,7 +278,17 @@ typedef struct
 
 /*** global variables defined in .c file *********************************************************/
 
+extern unsigned int clock_remain;
 extern mc_global_t mc_global;
+extern int op_clock_type;
+extern int clock_ticks;
+extern int clock_type;
+
+#ifdef SIGACT
+struct sigaction clock_new, clock_old, clock_dummy;
+#else
+void (*clock_alarm) (int);
+#endif
 
 /*** declarations of public functions ************************************************************/
 

lib/tty/tty-ncurses.c

@@ -205,6 +205,7 @@ tty_init (gboolean mouse_enable, gboolean is_xterm)
     noecho ();
     keypad (stdscr, TRUE);
     nodelay (stdscr, FALSE);
+    clock_init ();
 
     tty_setup_sigwinch (sigwinch_handler);
 }

lib/tty/tty-slang.c

@@ -342,6 +342,7 @@ tty_init (gboolean mouse_enable, gboolean is_xterm)
     do_enter_ca_mode ();
     tty_keypad (TRUE);
     tty_nodelay (FALSE);
+    clock_init ();
 
     tty_setup_sigwinch (sigwinch_handler);
 }

lib/tty/tty.c

@@ -78,6 +78,139 @@ sigintr_handler (int signo)
 /*** public functions ****************************************************************************/
 /* --------------------------------------------------------------------------------------------- */
 
+void
+show_clock (void)
+{
+    int lngstr;
+    time_t curtime;
+    int yt, xt;
+
+    char timestr[11] = "";
+
+    clock_type = op_clock_type;
+
+    if (clock_type)
+    {
+        curtime = time (0);
+
+        if (clock_type == HOUR_MIN)
+        {
+            lngstr = 6;
+            if (!(strftime (timestr, lngstr, "%R", localtime (&curtime))))
+                strcpy (timestr, "??:??");
+        }
+        else if (clock_type == HOUR_MIN_SEC)
+        {
+            lngstr = 9;
+            if (!(strftime (timestr, lngstr, "%X", localtime (&curtime))))
+                strcpy (timestr, "??:??:??");
+        }
+
+        tty_getyx (&yt, &xt);
+        tty_gotoyx (0, COLS - lngstr);
+        tty_print_string (timestr);
+        tty_gotoyx (yt, xt);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+clock_interrupt_handler (void)
+{
+    if (clock_type)
+    {
+        show_clock ();
+
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__bsdi__)
+        mc_refresh ();
+#endif
+
+#ifdef SIGACT
+        sigaction (SIGALRM, &clock_new, &clock_dummy);
+#else
+        signal (SIGALRM, clock_interrupt_handler);
+#endif
+        alarm (clock_ticks);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+set_clock_type (int ct)
+{
+    if (ct == HOUR_MIN_SEC)
+    {
+        /* update every seconds */
+        clock_type = ct;
+        clock_ticks = 1;
+    }
+    else if (ct == HOUR_MIN)
+    {
+        /* update every minits */
+        clock_type = ct;
+        clock_ticks = 60;
+    }
+    else
+    {
+        /* no clock at all */
+        clock_type = 0;
+        clock_ticks = 0;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+clock_init (void)
+{
+    if (op_clock_type)
+    {
+        set_clock_type (op_clock_type);
+        show_clock ();
+#ifdef SIGACT
+        clock_new.sa_handler = clock_interrupt_handler;
+        sigemptyset (&clock_new.sa_mask);
+        clock_new.sa_flags = 0;
+        sigaction (SIGALRM, &clock_new, &clock_old);
+#else
+        clock_alarm = signal (SIGALRM, clock_interrupt_handler);
+#endif
+        clock_remain = alarm (clock_ticks);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+clock_cancel (void)
+{
+    if (clock_type)
+    {
+#ifdef SIGACT
+        sigaction (SIGALRM, &clock_old, &clock_dummy);
+        if (clock_old.sa_handler != SIG_IGN)
+            alarm (clock_remain);
+#else
+        signal (SIGALRM, clock_alarm);
+        if (clock_alarm != SIG_IGN)
+            alarm (clock_remain);
+#endif
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+clock_resume (void)
+{
+    if (clock_type)
+        clock_interrupt_handler ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
 /**
  * Check terminal type. If $TERM is not set or value is empty, mc finishes with EXIT_FAILURE.
  *

lib/tty/tty.h

@@ -71,6 +71,13 @@ extern int reset_hp_softkeys;
 
 /*** declarations of public functions ************************************************************/
 
+void clock_interrupt_handler (void);
+void set_clock_type (int ct);
+void clock_init (void);
+void clock_cancel (void);
+void clock_resume (void);
+void show_clock (void);
+
 extern void tty_beep (void);
 
 /* {{{ Input }}} */

lib/widget/menu.c

@@ -226,6 +226,12 @@ menubar_draw (WMenuBar * menubar)
 
         tty_print_char (' ');
     }
+    if (op_clock_type != NO_CLOCK)
+    {
+        mc_log ("show_clock\n");
+        clock_resume ();
+        show_clock ();
+    }
 
     if (menubar->is_dropped)
         menubar_draw_drop (menubar);